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− | == | + | ==개요== |
* chain rule | * chain rule | ||
* gradient descent | * gradient descent | ||
− | * | + | * neural network architectures |
* backpropagation | * backpropagation | ||
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==memo== | ==memo== | ||
14번째 줄: | 11번째 줄: | ||
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− | * [[ | + | == 노트 == |
+ | * Artificial neural networks (ANN) are a buzzword in machine learning right now — both for the technical expert and the everyday user.<ref name="ref_31c4">[https://medium.com/capital-one-tech/artificial-neural-networks-for-machine-learning-79c67d0681e9 Artificial Neural Networks for Machine Learning]</ref> | ||
+ | * Today, ANNs are growing in popularity due to the increased amount of data and computing power available.<ref name="ref_31c4" /> | ||
+ | * The input layer represents the data that we feed the ANN.<ref name="ref_31c4" /> | ||
+ | * ANNs are used in not only cutting edge machine learning applications, but in situations and applications that have been around for decades.<ref name="ref_31c4" /> | ||
+ | * An ANN with the name of MADALINE was actually the first one ever applied to a real world problem back in 1959.<ref name="ref_31c4" /> | ||
+ | * For this application, the ANN must be trained to accurately understand what people with different voices and accents are saying.<ref name="ref_31c4" /> | ||
+ | * Today, there are multiple programs that can build out ANNs for you.<ref name="ref_31c4" /> | ||
+ | * ANNs depend highly on activation functions, which allow them to follow a non-linear model and learn data very quickly.<ref name="ref_31c4" /> | ||
+ | * A deep understanding of these concepts is needed to build and implement an ANN.<ref name="ref_31c4" /> | ||
+ | * A typical artificial neural network will likely only have two or three hidden layers of nodes.<ref name="ref_9707">[https://www.thinkautomation.com/eli5/eli5-what-is-an-artificial-neural-network/ ELI5: what is an artificial neural network?]</ref> | ||
+ | * Artificial neural networks don’t use task-specific rules or linear reasoning.<ref name="ref_9707" /> | ||
+ | * So, the ANN gets lots of input along with the answers it should come up with.<ref name="ref_9707" /> | ||
+ | * Asking ‘what is an artificial neural network’ invites a host of complex answers.<ref name="ref_9707" /> | ||
+ | * Unlike other machine learning algorithms, which may organize data or crunch numbers, neural networks learn from experience.<ref name="ref_99c7">[https://marketinginsidergroup.com/content-marketing/artificial-neural-networks-every-marketer-know/ Artificial Neural Networks: What Every Marketer Should Know]</ref> | ||
+ | * Remember the single hidden layer in the artificial neural network?<ref name="ref_99c7" /> | ||
+ | * Many of the biggest advances in AI are driven by artificial neural networks.<ref name="ref_193a">[https://www.unite.ai/what-are-neural-networks/ What are Neural Networks?]</ref> | ||
+ | * These ANNs are capable of extracting complex patterns from data, applying these patterns to unseen data to classify/recognize the data.<ref name="ref_193a" /> | ||
+ | * Deep neural networks take the basic form of the MLP and make it larger by adding more hidden layers in the middle of the model.<ref name="ref_193a" /> | ||
+ | * The multiple hidden layers of a deep neural network are able to interpret more complex patterns than the traditional multilayer perceptron.<ref name="ref_193a" /> | ||
+ | * Different layers of the deep neural network learn the patterns of different parts of the data.<ref name="ref_193a" /> | ||
+ | * A Convolutional Neural Network is a special type of neural network that is adept at interpreting the patterns found within images.<ref name="ref_193a" /> | ||
+ | * On the other hand, artificial neural networks are built on the principle of bio-mimicry.<ref name="ref_ffd0">[https://www.ovh.com/blog/what-does-training-neural-networks-mean/ What does Training Neural Networks mean?]</ref> | ||
+ | * The development of new algorithms to model such processes is needed, and ANNs can play a major role.<ref name="ref_c920">[https://www.routledge.com/Artificial-Neural-Networks-in-Biological-and-Environmental-Analysis/Hanrahan/p/book/9781138112933 Artificial Neural Networks in Biological and Environmental Analysis]</ref> | ||
+ | * The main topic of this article will be the extended version of neural networks, known as deep learning.<ref name="ref_bd19">[https://towardsdatascience.com/artificial-neural-networks-ann-21637869b306 Artificial Neural Networks (ANN)]</ref> | ||
+ | * ANNs consist of many interconnected computing units, called neurons, and are functional approximates that map inputs to outputs.<ref name="ref_bd19" /> | ||
+ | * An artificial neural network (ANN) is similar, but a computing network in science that resembles the properties of the human brain.<ref name="ref_bd19" /> | ||
+ | * Most neural networks today are organized in layers of nodes, and each node moves meaningfully within and outside the network.<ref name="ref_bd19" /> | ||
+ | * ANNs are function approximators, mapping inputs to outputs, and are composed of many interconnected computational units, called neurons.<ref name="ref_0137">[http://uc-r.github.io/ann_fundamentals Artificial Neural Network Fundamentals · UC Business Analytics R Programming Guide]</ref> | ||
+ | * This tutorial provides an introduction to ANNs and discusses a few key features to consider.<ref name="ref_0137" /> | ||
+ | * This tutorial provides a high level overview of ANNs, an analytic technique that is currently undergoing rapid development and research.<ref name="ref_0137" /> | ||
+ | * A brief description of the biologic neuron, which ANNs attempt to mimic.<ref name="ref_0137" /> | ||
+ | * How ANNs learn: Introducing the back-propagation algorithm.<ref name="ref_0137" /> | ||
+ | * The output signal then moves to a raw output or other neurons depending on specific ANN architecture.<ref name="ref_0137" /> | ||
+ | * ANNs are often described as having an Input layer, Hidden layer, and Output layer.<ref name="ref_0137" /> | ||
+ | * Within the hidden layer is where a majority of the ‘learning’ takes place, and the output layer displays the results of the ANN.<ref name="ref_0137" /> | ||
+ | * Each of the black lines with correspond to a weight, , and describe how artificial neurons are connections to one another within the ANN.<ref name="ref_0137" /> | ||
+ | * top-left and top-right plots show two possible ANN configurations.<ref name="ref_0137" /> | ||
+ | * In the top-right ANN we have a network with two hidden layers.<ref name="ref_0137" /> | ||
+ | * Activation functions enable the ANN to learn non-linear properties present in the data.<ref name="ref_0137" /> | ||
+ | * The output ( ) can feed into the output layer of a neural network, or in deeper architectures may feed into additional hidden layers.<ref name="ref_0137" /> | ||
+ | * The choice of the activation function governs the required data scaling necessary for ANN analysis.<ref name="ref_0137" /> | ||
+ | * We have described the structure of ANNs, however, we have not touched on how these networks learn.<ref name="ref_0137" /> | ||
+ | * To begin training our notional single-layer one-neuron neural network we initially randomly assign weights.<ref name="ref_0137" /> | ||
+ | * We then run the neural network with the random weights and record the outputs generated.<ref name="ref_0137" /> | ||
+ | * Once we have our ANN output values ( ) we can compare them to the data set output values ( ).<ref name="ref_0137" /> | ||
+ | * Recall that our neural network is simply a function, .<ref name="ref_0137" /> | ||
+ | * Once the weights are updated, we can re-run the neural network with the update weight values.<ref name="ref_0137" /> | ||
+ | * The back-propagation algorithm (described in the previous paragraphs) is the fundamental process by which an ANN learns.<ref name="ref_0137" /> | ||
+ | * Given a ANN, back-propagation requires operations for -hidden layers, and operations for the number of input weights.<ref name="ref_0137" /> | ||
+ | * ANN hyperparameters are settings used to control how a neural network performs.<ref name="ref_0137" /> | ||
+ | * Hyperparameters dictate how well neural networks are able to learn the underlying functions they approximate.<ref name="ref_0137" /> | ||
+ | * Generally, when ANNs are developed they are evaluated against one data set that has been split into a training data set and a test data set.<ref name="ref_0137" /> | ||
+ | * When testing ANN hyperparameters we generally see multiple ANNs created with different hyperparameters trained on the training data set.<ref name="ref_0137" /> | ||
+ | * When testing ANNs we are concerned with two types of error, under-fitting and over-fitting.<ref name="ref_0137" /> | ||
+ | * An ANN exhibiting under-fitting is a neural network in which the error rate of the training data set is very high.<ref name="ref_0137" /> | ||
+ | * An ANN exhibiting over-fitting has a large gap between the error rates on the training data set and the error rates on the test data set.<ref name="ref_0137" /> | ||
+ | * Adjusting these ANN hyperparameters is an adjustment of the neural networks capacity.<ref name="ref_0137" /> | ||
+ | * An over-capacity ANN is likely to show over-fitting when tested against the test data set.<ref name="ref_0137" /> | ||
+ | * Next you’ll learn how to apply ANNs to predict continuous and categorical outcomes.<ref name="ref_0137" /> | ||
+ | * The first artificial neural network was invented in 1958 by psychologist Frank Rosenblatt.<ref name="ref_5573">[https://www.computerworld.com/article/2591759/artificial-neural-networks.html Artificial Neural Networks]</ref> | ||
+ | * Artificial neural networks typically start out with randomized weights for all their neurons.<ref name="ref_5573" /> | ||
+ | * A back-propagation ANN, conversely, is trained by humans to perform specific tasks.<ref name="ref_5573" /> | ||
+ | * During the training period, the teacher evaluates whether the ANN's output is correct.<ref name="ref_5573" /> | ||
+ | * Implemented on a single computer, an artificial neural network is typically slower than a more traditional algorithmic solution.<ref name="ref_5573" /> | ||
+ | * The parallel architecture also allows ANNs to process very large amounts of data very efficiently.<ref name="ref_5573" /> | ||
+ | * Artificial neural networks have proved useful in a variety of real-world applications that deal with complex, often incomplete data.<ref name="ref_5573" /> | ||
+ | * In addition, recent programs for text-to-speech have utilized ANNs.<ref name="ref_5573" /> | ||
+ | * ANNs are used to discover other kinds of crime, too.<ref name="ref_5573" /> | ||
+ | * Bomb detectors in many U.S. airports use ANNs to analyze airborne trace elements to sense the presence of explosive chemicals.<ref name="ref_5573" /> | ||
+ | * A neural network breaks down the input into layers of abstraction.<ref name="ref_d713">[https://kr.mathworks.com/discovery/neural-network.html What Is a Neural Network?]</ref> | ||
+ | * Understanding the human brain is critical for understanding ANN.<ref name="ref_525d">[https://www.fierceelectronics.com/electronics/what-artificial-neural-network What is an artificial neural network?]</ref> | ||
+ | * With ANN, artificial systems mimic the same functionality of the human brain.<ref name="ref_525d" /> | ||
+ | * ANNs are used in a number of applications today.<ref name="ref_525d" /> | ||
+ | * These artificial neural networks try to replicate only the most basic elements of this complicated, versatile, and powerful organism.<ref name="ref_e63d">[http://www2.psych.utoronto.ca/users/reingold/courses/ai/cache/neural2.html What are Artificial Neural Networks]</ref> | ||
+ | * They are significantly more complex than the existing artificial neurons that are built into today's artificial neural networks.<ref name="ref_e63d" /> | ||
+ | * To do this, the basic unit of neural networks, the artificial neurons, simulate the four basic functions of natural neurons.<ref name="ref_e63d" /> | ||
+ | * All artificial neural networks are constructed from this basic building block - the processing element or the artificial neuron.<ref name="ref_e63d" /> | ||
+ | * Basically, all artificial neural networks have a similar structure or topology as shown in Figure 2.4.1.<ref name="ref_e63d" /> | ||
+ | * Definition - What does Artificial Neural Network (ANN) mean?<ref name="ref_7b63">[https://www.techopedia.com/definition/5967/artificial-neural-network-ann What is an Artificial Neural Network (ANN)?]</ref> | ||
+ | * For a more detailed introduction to neural networks, Michael Nielsen’s Neural Networks and Deep Learning is a good place to start.<ref name="ref_6223">[https://playground.tensorflow.org/ A Neural Network Playground]</ref> | ||
+ | * We’ve open sourced it on GitHub with the hope that it can make neural networks a little more accessible and easier to learn.<ref name="ref_6223" /> | ||
+ | * Artificial neural networks (ANNs) are comprised of a node layers, containing an input layer, one or more hidden layers, and an output layer.<ref name="ref_7b88">[https://www.ibm.com/cloud/learn/neural-networks What are Neural Networks?]</ref> | ||
+ | * Most deep neural networks are feedforward, meaning they flow in one direction only, from input to output.<ref name="ref_7b88" /> | ||
+ | * The perceptron is the oldest neural network, created by Frank Rosenblatt in 1958.<ref name="ref_7b88" /> | ||
+ | * Feedforward neural networks, or multi-layer perceptrons (MLPs), are what we’ve primarily been focusing on within this article.<ref name="ref_7b88" /> | ||
+ | * As a result, it’s worth noting that the “deep” in deep learning is just referring to the depth of layers in a neural network.<ref name="ref_7b88" /> | ||
+ | * The history of neural networks is longer than most people think.<ref name="ref_7b88" /> | ||
+ | * Neural network, a computer program that operates in a manner inspired by the natural neural network in the brain.<ref name="ref_a4fe">[https://www.britannica.com/technology/neural-network Neural network | computing]</ref> | ||
+ | * The objective of such artificial neural networks is to perform such cognitive functions as problem solving and machine learning.<ref name="ref_a4fe" /> | ||
+ | * In 1954 Belmont Farley and Wesley Clark of the Massachusetts Institute of Technology succeeded in running the first simple neural network.<ref name="ref_a4fe" /> | ||
+ | * The primary appeal of neural networks is their ability to emulate the brain’s pattern-recognition skills.<ref name="ref_a4fe" /> | ||
+ | * The output of a neural network depends on the weights of the connections between neurons in different layers.<ref name="ref_a4fe" /> | ||
+ | * Artificial neural networks can also be thought of as learning algorithms that model the input-output relationship.<ref name="ref_4b98">[https://developer.nvidia.com/discover/artificial-neural-network Artificial Neural Network]</ref> | ||
+ | * An artificial neural network transforms input data by applying a nonlinear function to a weighted sum of the inputs.<ref name="ref_4b98" /> | ||
+ | * For example, a neural network performing lane detection in a car needs to have low latency and a small runtime application.<ref name="ref_4b98" /> | ||
+ | * Connectionist models of human perception and cognition utilize artificial neural networks.<ref name="ref_4b98" /> | ||
+ | * The first, middle, and last layers of a neural network are called the input layer, hidden layer, and output layer respectively.<ref name="ref_4b98" /> | ||
+ | * Artificial neural networks use different layers of mathematical processing to make sense of the information it’s fed.<ref name="ref_c333">[https://bernardmarr.com/default.asp?contentID=1568 What Are Artificial Neural Networks - A Simple Explanation For Absolutely Anyone]</ref> | ||
+ | * The majority of neural networks are fully connected from one layer to another.<ref name="ref_c333" /> | ||
+ | * In order for ANNs to learn, they need to have a tremendous amount of information thrown at them called a training set.<ref name="ref_c333" /> | ||
+ | * There are several ways artificial neural networks can be deployed including to classify information, predict outcomes and cluster data.<ref name="ref_c333" /> | ||
+ | * Google uses a 30-layered neural network to power Google Photos as well as to power its “watch next” recommendations for YouTube videos.<ref name="ref_c333" /> | ||
+ | * Facebook uses artificial neural networks for its DeepFace algorithm, which can recognise specific faces with 97% accuracy.<ref name="ref_c333" /> | ||
+ | * Generally, the working of a human brain by making the right connections is the idea behind ANNs.<ref name="ref_2614">[https://data-flair.training/blogs/artificial-neural-network/ What is Artificial Neural Network]</ref> | ||
+ | * Basically, we can consider ANN as nonlinear statistical data.<ref name="ref_2614" /> | ||
+ | * ANN stands for Artificial Neural Networks.<ref name="ref_2614" /> | ||
+ | * Although, the structure of the ANN affected by a flow of information.<ref name="ref_2614" /> | ||
+ | * In this ANN Tutorial, we will learn Artificial Neural Network.<ref name="ref_2614" /> | ||
+ | * Here, we will explore the working and structures of ANN.<ref name="ref_2614" /> | ||
+ | * As a result, we can say that ANNs are composed of multiple nodes.<ref name="ref_2614" /> | ||
+ | * In this particular Artificial Neural Network, it allows feedback loops.<ref name="ref_2614" /> | ||
+ | * Artificial Neural Network used to perform a various task.<ref name="ref_2614" /> | ||
+ | * Aerospace Generally, we use ANN a for Autopilot aircrafts.<ref name="ref_2614" /> | ||
+ | * In various ways, we use ANN an in the military.<ref name="ref_2614" /> | ||
+ | * Basically , we use an Artificial neural network in electronics in many ways.<ref name="ref_2614" /> | ||
+ | * Thus, we use an Artificial neural network in many ways.<ref name="ref_2614" /> | ||
+ | * Generally, we use an Artificial neural network in transportation in many ways.<ref name="ref_2614" /> | ||
+ | * It also uses an ANN in pattern Recognition.<ref name="ref_2614" /> | ||
+ | * Yes, that’s why there is a need to use big data in training neural networks.<ref name="ref_4945">[https://theconversation.com/what-is-a-neural-network-a-computer-scientist-explains-151897 What is a neural network? A computer scientist explains]</ref> | ||
+ | * A neural network is a network of artificial neurons programmed in software.<ref name="ref_4945" /> | ||
+ | * Let’s take an example of a neural network that is trained to recognize dogs and cats.<ref name="ref_4945" /> | ||
+ | * Another common question I see floating around – neural networks require a ton of computing power, so is it really worth using them?<ref name="ref_b540">[https://www.analyticsvidhya.com/blog/2020/02/cnn-vs-rnn-vs-mlp-analyzing-3-types-of-neural-networks-in-deep-learning/ Types of Neural Networks]</ref> | ||
+ | * As you can see here, ANN consists of 3 layers – Input, Hidden and Output.<ref name="ref_b540" /> | ||
+ | * Artificial Neural Network is capable of learning any nonlinear function.<ref name="ref_b540" /> | ||
+ | * ANN loses the spatial features of an image.<ref name="ref_b540" /> | ||
+ | * In this article, I have discussed the importance of deep learning and the differences among different types of neural networks.<ref name="ref_b540" /> | ||
+ | * The input layer is where rules are predetermined and representative examples are given to show the ANN what the output should look like.<ref name="ref_cc2e">[https://www.cybiant.com/resources/artificial-neural-networks/ Artificial Neural Networks]</ref> | ||
+ | * Looking at an analogy may be helpful in understanding neural networks better.<ref name="ref_cc2e" /> | ||
+ | * Most deep learning methods use neural network architectures, which is why it is often referred to as deep neural networks.<ref name="ref_cc2e" /> | ||
+ | * These inputs create electric impulses, which quickly travel through the neural network.<ref name="ref_4d31">[https://www.tutorialspoint.com/artificial_intelligence/artificial_intelligence_neural_networks.htm Artificial Intelligence]</ref> | ||
+ | * ANNs are composed of multiple nodes, which imitate biological neurons of human brain.<ref name="ref_4d31" /> | ||
+ | * ANNs are capable of learning, which takes place by altering weight values.<ref name="ref_4d31" /> | ||
+ | * It involves a teacher that is scholar than the ANN itself.<ref name="ref_4d31" /> | ||
+ | * The ANN comes up with guesses while recognizing.<ref name="ref_4d31" /> | ||
+ | * Then the teacher provides the ANN with the answers.<ref name="ref_4d31" /> | ||
+ | * The ANN makes a decision by observing its environment.<ref name="ref_4d31" /> | ||
+ | * The first trainable neural network, the Perceptron, was demonstrated by the Cornell University psychologist Frank Rosenblatt in 1957.<ref name="ref_36aa">[https://news.mit.edu/2017/explained-neural-networks-deep-learning-0414 Explained: Neural networks]</ref> | ||
+ | * The recent resurgence in neural networks — the deep-learning revolution — comes courtesy of the computer-game industry.<ref name="ref_36aa" /> | ||
+ | * Artificial neural networks (ANNs) are computational models that are loosely inspired by their biological counterparts.<ref name="ref_06ca">[https://www.frontiersin.org/research-topics/4817/artificial-neural-networks-as-models-of-neural-information-processing Artificial Neural Networks as Models of Neural Information Processing]</ref> | ||
+ | * In recent years, major breakthroughs in ANN research have transformed the machine learning landscape from an engineering perspective.<ref name="ref_06ca" /> | ||
+ | * At the same time, scientists have started to revisit ANNs as models of neural information processing in biological agents.<ref name="ref_06ca" /> | ||
+ | * We welcome contributions that are of direct relevance to neuroscientists that use ANNs as a model of neural information processing.<ref name="ref_06ca" /> | ||
+ | * As you can see, with neural networks, we’re moving towards a world of fewer surprises.<ref name="ref_49b6">[https://wiki.pathmind.com/neural-network A Beginner's Guide to Neural Networks and Deep Learning]</ref> | ||
+ | * This is because a neural network is born in ignorance.<ref name="ref_49b6" /> | ||
+ | * Now, that form of multiple linear regression is happening at every node of a neural network.<ref name="ref_49b6" /> | ||
+ | * While neural networks working with labeled data produce binary output, the input they receive is often continuous.<ref name="ref_49b6" /> | ||
+ | * Artificial intelligence (AI) pyramid illustrates the evolution of ML approach to ANN and leading to deep learning (DL).<ref name="ref_d220">[https://www.intechopen.com/online-first/data-processing-using-artificial-neural-networks Data Processing Using Artificial Neural Networks]</ref> | ||
+ | * The basic concept of node and neutron has been explained, with the help of diagrams, leading to the ANN model and its operation.<ref name="ref_d220" /> | ||
+ | * Literature depicts that ML, ANN and deep learning (DL) falls under the pyramid of AI and shown in Figure 1.<ref name="ref_d220" /> | ||
+ | * Under ANN, DL has gained much importance among researchers.<ref name="ref_d220" /> | ||
+ | * DL is a complex network set of ANN with various layers of processing, which improves the results by developing high levels of insight.<ref name="ref_d220" /> | ||
+ | * The origins of all the work on ANN are in neurobiological studies that date back to about a century ago.<ref name="ref_d220" /> | ||
+ | * A brief overview of evolution in ANN and significant milestones are shown in the timeline, as shown in Figures 3 and 4.<ref name="ref_d220" /> | ||
+ | * Literature depicts that, in the 1980s, very few researchers were working on deep NNs, and it gained popularity in the early 1990s.<ref name="ref_d220" /> | ||
+ | * Since then, a large number of research articles have been published on applications of ANN and this journey is on-going.<ref name="ref_d220" /> | ||
+ | * The architecture of ANN is stimulated by the framework of biological neurons, like in the human brain.<ref name="ref_d220" /> | ||
+ | * Likewise, the ANN is a framework of interlinked nodes, similar to neurons, forming a network model.<ref name="ref_d220" /> | ||
+ | * ANN operations are not based on explicit rules and outputs are generated by trial and error procedures through sequential computations.<ref name="ref_d220" /> | ||
+ | * To comprehend the basic structure of ANN, firstly, the understanding of ‘node’ is necessary.<ref name="ref_d220" /> | ||
+ | * Figure 6 represents the general model of ANN, which is stimulated by a biological neuron.<ref name="ref_d220" /> | ||
+ | * Figure 6 shows that there are three layers in ANN called the input layer, the output layer and the hidden layer.<ref name="ref_d220" /> | ||
+ | * In the ANN, the processing part is performed in the hidden layer.<ref name="ref_d220" /> | ||
+ | * Generally speaking, each ANN has three main components, i.e., node character, network topology and the learning rules.<ref name="ref_d220" /> | ||
+ | * The interconnecting network model, between the nodes of ANN, with each other, is called the topology (or architecture).<ref name="ref_d220" /> | ||
+ | * ANN is composed of input layers, hidden layers and output layers, as already discussed in Figure 6.<ref name="ref_d220" /> | ||
+ | * A single-layer ANN, with a single output, is known as Perceptron.<ref name="ref_d220" /> | ||
+ | * A conceptual model for layers and ANN topology is shown in Figure 7.<ref name="ref_d220" /> | ||
+ | * Also, it can be seen that there is L number of hidden layers in the ANN model.<ref name="ref_d220" /> | ||
+ | * ‘i’ as node number, i.e., from 1 to i. Y is the output for the mentioned ANN model.<ref name="ref_d220" /> | ||
+ | * 3.2.1 Perceptron and multi-layer architectures A single-layered ANN, with a single output, is known as the perceptron.<ref name="ref_d220" /> | ||
+ | * Multi-layer perceptrons (MLPs) are the most commonly used architecture for ANN.<ref name="ref_d220" /> | ||
+ | * Figure 9 shows the ANN model for feedback network connections.<ref name="ref_d220" /> | ||
+ | * The training of the ANN is accomplished through a learning process.<ref name="ref_d220" /> | ||
+ | * In this process, the ANN model adjusts its weights, against the supplied inputs, thus producing outputs similar to inputs.<ref name="ref_d220" /> | ||
+ | * Unsupervised ANN models are used in diagnosing diseases, image segmentation and many more.<ref name="ref_d220" /> | ||
+ | * The primary reason for ANN popularity is due to approximated data output.<ref name="ref_d220" /> | ||
+ | * There are five main steps for the approximation function in the ANN model, as given below.<ref name="ref_d220" /> | ||
+ | * During the training process, ANN might suffer from the overfitting and underfitting.<ref name="ref_d220" /> | ||
+ | * 5.4 Simulation Simulation is the ultimate goal of applying ANN networks.<ref name="ref_d220" /> | ||
+ | * It is the representation of predicted output data for an ANN model.<ref name="ref_d220" /> | ||
+ | * The validation set is used to inform the ANN when training is to be terminated (when the minimum error point is achieved).<ref name="ref_d220" /> | ||
+ | * The test set provides an entirely independent way of examining the precision of the ANN.<ref name="ref_d220" /> | ||
+ | * The test set is a set of sample data that is used for the evaluation of the ANN model.<ref name="ref_d220" /> | ||
+ | * The biases and weights are the parameters of the network that are required to be adjusted before operating an ANN.<ref name="ref_d220" /> | ||
+ | * These parameters can be modified by using either supervised or unsupervised approach for any ANN model.<ref name="ref_d220" /> | ||
+ | * For training purpose, the supervised learning process is generally considered for determining biases and weights of an ANN network.<ref name="ref_d220" /> | ||
+ | * The supervised training process of an ANN network could be attained by using delta rule.<ref name="ref_d220" /> | ||
+ | * The backpropagation algorithm is mostly used for the application of delta rule for the training process of an ANN.<ref name="ref_d220" /> | ||
+ | * The ANN training can be achieved either by batch training or incremental training.<ref name="ref_d220" /> | ||
+ | * CNNs are very much similar to ANN that can be observed as the acyclic graph in the form of a well-arranged collection of neurons.<ref name="ref_d220" /> | ||
+ | * 7.2 Recurrent neural network (RNN) RNNs are used for the tasks that require consecutive sequential inputs for processing.<ref name="ref_d220" /> | ||
+ | * A simple ANN model was developed using Python.<ref name="ref_d220" /> | ||
+ | * Conclusions Operation of the ANN model is the simulation of the human brain, and they fall under the knowledge domain of AI.<ref name="ref_d220" /> | ||
+ | * The popularity of ANN models were increased in the early 1990s, and many studies have been done since.<ref name="ref_d220" /> | ||
+ | * The basic ANN model has three main layers, and the main process is performed in the middle layer known as the hidden layer.<ref name="ref_d220" /> | ||
+ | * The output of the ANN model is very much dependent on the characteristics and function it carries under the hidden layer.<ref name="ref_d220" /> | ||
+ | * The ANN models can perform supervised learning as well as unsupervised learning depending upon the task.<ref name="ref_d220" /> | ||
+ | * Output accuracy of the ANN models is very much dependent on the number of hidden layers and the number of epochs.<ref name="ref_d220" /> | ||
+ | * This ANN technology, combined with other advanced and AI knowledge areas, is making life easier in almost every domain.<ref name="ref_d220" /> | ||
+ | * In other words, the neural network uses the examples to automatically infer rules for recognizing handwritten digits.<ref name="ref_60b4">[http://neuralnetworksanddeeplearning.com/chap1.html Neural networks and deep learning]</ref> | ||
+ | * In this chapter we'll write a computer program implementing a neural network that learns to recognize handwritten digits.<ref name="ref_60b4" /> | ||
+ | * We're focusing on handwriting recognition because it's an excellent prototype problem for learning about neural networks in general.<ref name="ref_60b4" /> | ||
+ | * But how can we devise such algorithms for a neural network?<ref name="ref_60b4" /> | ||
+ | * In the next section I'll introduce a neural network that can do a pretty good job classifying handwritten digits.<ref name="ref_60b4" /> | ||
+ | * Up to now, we've been discussing neural networks where the output from one layer is used as input to the next layer.<ref name="ref_60b4" /> | ||
+ | * Having defined neural networks, let's return to handwriting recognition.<ref name="ref_60b4" /> | ||
+ | * To understand why we do this, it helps to think about what the neural network is doing from first principles.<ref name="ref_60b4" /> | ||
+ | * Now that we have a design for our neural network, how can it learn to recognize digits?<ref name="ref_60b4" /> | ||
+ | * We'll use the test data to evaluate how well our neural network has learned to recognize digits.<ref name="ref_60b4" /> | ||
+ | * So for now we're going to forget all about the specific form of the cost function, the connection to neural networks, and so on.<ref name="ref_60b4" /> | ||
+ | * the biggest neural networks have cost functions which depend on billions of weights and biases in an extremely complicated way.<ref name="ref_60b4" /> | ||
+ | * How can we apply gradient descent to learn in a neural network?<ref name="ref_60b4" /> | ||
+ | * In online learning, a neural network learns from just one training input at a time (just as human beings do).<ref name="ref_60b4" /> | ||
+ | * The centerpiece is a Network class, which we use to represent a neural network.<ref name="ref_60b4" /> | ||
+ | * """Train the neural network using mini-batch stochastic gradient descent.<ref name="ref_60b4" /> | ||
+ | * ""Return the number of test inputs for which the neural network outputs the correct result.<ref name="ref_60b4" /> | ||
+ | * The transcript shows the number of test images correctly recognized by the neural network after each epoch of training.<ref name="ref_60b4" /> | ||
+ | * We might worry not only about the learning rate, but about every other aspect of our neural network.<ref name="ref_60b4" /> | ||
+ | * Or maybe it's impossible for a neural network with this architecture to learn to recognize handwritten digits?<ref name="ref_60b4" /> | ||
+ | * You need to learn that art of debugging in order to get good results from neural networks.<ref name="ref_60b4" /> | ||
+ | * This is a nice data format, but for use in neural networks it's helpful to modify the format of the ``training_data`` a little.<ref name="ref_60b4" /> | ||
+ | * Based on ``load_data``, but the format is more convenient for use in our implementation of neural networks.<ref name="ref_60b4" /> | ||
+ | * Indeed, it means that the SVM is performing roughly as well as our neural networks, just a little worse.<ref name="ref_60b4" /> | ||
+ | * At present, well-designed neural networks outperform every other technique for solving MNIST, including SVMs.<ref name="ref_60b4" /> | ||
+ | * While our neural network gives impressive performance, that performance is somewhat mysterious.<ref name="ref_60b4" /> | ||
+ | * To put these questions more starkly, suppose that a few decades hence neural networks lead to artificial intelligence (AI).<ref name="ref_60b4" /> | ||
+ | * Processing units make up ANNs, which in turn consist of inputs and outputs.<ref name="ref_c796">[https://www.investopedia.com/terms/a/artificial-neural-networks-ann.asp Artificial Neural Network (ANN)]</ref> | ||
+ | * Artificial neural networks are built like the human brain, with neuron nodes interconnected like a web.<ref name="ref_c796" /> | ||
+ | * An ANN has hundreds or thousands of artificial neurons called processing units, which are interconnected by nodes.<ref name="ref_c796" /> | ||
+ | * An ANN initially goes through a training phase where it learns to recognize patterns in data, whether visually, aurally, or textually.<ref name="ref_c796" /> | ||
+ | * Artificial neural networks are paving the way for life-changing applications to be developed for use in all sectors of the economy.<ref name="ref_c796" /> | ||
+ | * Artificial intelligence platforms that are built on ANNs are disrupting the traditional ways of doing things.<ref name="ref_c796" /> | ||
+ | * Artificial neural networks have been applied in all areas of operations.<ref name="ref_c796" /> | ||
+ | * ANNs have been highly efficient in offering solutions to problems, where traditional models have failed or are very complicated to build.<ref name="ref_4855">[https://www.sciencedirect.com/topics/earth-and-planetary-sciences/artificial-neural-network Artificial Neural Network - an overview]</ref> | ||
+ | * Due to the nonlinear nature of the ANNs, they are able to express much more complex phenomena than some linear modeling techniques.<ref name="ref_4855" /> | ||
+ | * One of the most critical aspects of the use of ANN as a modeling tool is the level of knowledge needed.<ref name="ref_4855" /> | ||
+ | * In general, limited expertise exists in modeling with ANN for practical applications.<ref name="ref_4855" /> | ||
+ | * The ANN is one of many versatile tools to meet the demand in drug discovery modeling.<ref name="ref_51e9">[https://link.springer.com/protocol/10.1007/978-1-60327-101-1_2 Overview of Artificial Neural Networks]</ref> | ||
+ | * Compared to a traditional regression approach, the ANN is capable of modeling complex nonlinear relationships.<ref name="ref_51e9" /> | ||
+ | * If you’ve spent any time reading about artificial intelligence, you’ll almost certainly have heard about artificial neural networks.<ref name="ref_ec2d">[https://www.digitaltrends.com/cool-tech/what-is-an-artificial-neural-network/ What is an artificial neural network? Here’s everything you need to know]</ref> | ||
+ | * Artificial neural networks are one of the main tools used in machine learning.<ref name="ref_ec2d" /> | ||
+ | * There are multiple types of neural network, each of which come with their own specific use cases and levels of complexity.<ref name="ref_ec2d" /> | ||
+ | * In the same way that we learn from experience in our lives, neural networks require data to learn.<ref name="ref_ec2d" /> | ||
+ | * In most cases, the more data that can be thrown at a neural network, the more accurate it will become.<ref name="ref_ec2d" /> | ||
+ | * When researchers or computer scientists set out to train a neural network, they typically divide their data into three sets.<ref name="ref_ec2d" /> | ||
+ | * The biggest issue, however, is that neural networks are “black boxes,” in which the user feeds in data and receives answers.<ref name="ref_ec2d" /> | ||
+ | * A hyperparameter is a setting that affects the structure or operation of the neural network.<ref name="ref_9b69">[https://missinglink.ai/guides/neural-network-concepts/complete-guide-artificial-neural-networks/ Complete Guide to Artificial Neural Network Concepts & Models]</ref> | ||
+ | * When training neural networks, like in other machine learning techniques, we try to balance between bias and variance.<ref name="ref_9b69" /> | ||
+ | * Another meaning of bias is a “ bias neuron ” which is used in every layer of the neural network.<ref name="ref_9b69" /> | ||
+ | * Source data fed into the neural network, with the goal of making a decision or prediction about the data.<ref name="ref_9b69" /> | ||
+ | * Artificial Neural Networks (ANN) is a supervised learning system built of a large number of simple elements, called neurons or perceptrons.<ref name="ref_9b69" /> | ||
+ | * However, for large neural networks, a training algorithm is needed that is very computationally efficient.<ref name="ref_9b69" /> | ||
+ | * In a neural network, inputs, which are typically real values, are fed into the neurons in the network.<ref name="ref_9b69" /> | ||
+ | * An activation function is a mathematical equation that determines the output of each element (perceptron or neuron) in the neural network.<ref name="ref_9b69" /> | ||
+ | * Classic activation functions used in neural networks include the step function (which has a binary input), sigmoid and tanh.<ref name="ref_9b69" /> | ||
+ | * Underfitting happens when the neural network is not able to accurately predict for the training set, not to mention for the validation set.<ref name="ref_9b69" /> | ||
+ | * A high bias means the neural network is not able to generate correct predictions even for the examples it trained on.<ref name="ref_9b69" /> | ||
+ | * In each layer of the neural network, a bias neuron is added, which simply stores a value of 1.<ref name="ref_9b69" /> | ||
+ | * To understand classification with neural networks let’s cover some other common classification algorithms.<ref name="ref_9b69" /> | ||
+ | * For certain classification problems, neural networks can provide improved performance compared to other algorithms.<ref name="ref_9b69" /> | ||
+ | * Essentially, any regression equation can be modeled by a neural network.<ref name="ref_9b69" /> | ||
+ | * Can you use a neural network to run a regression?<ref name="ref_9b69" /> | ||
+ | * The short answer is yes – neural networks can generate a model that approximates any regression function.<ref name="ref_9b69" /> | ||
+ | * A Recurrent Neural Network (RNN) helps neural networks deal with input data that is sequential in nature.<ref name="ref_9b69" /> | ||
+ | * An artificial neural network is an interconnected group of nodes, inspired by a simplification of neurons in a brain .<ref name="ref_9792">[https://en.wikipedia.org/wiki/Artificial_neural_network Artificial neural network]</ref> | ||
+ | * Successive adjustments will cause the neural network to produce output which is increasingly similar to the target output.<ref name="ref_9792" /> | ||
+ | * An artificial neural network consists of a collection of simulated neurons.<ref name="ref_9792" /> | ||
+ | * ANNs are composed of artificial neurons which are conceptually derived from biological neurons.<ref name="ref_9792" /> | ||
+ | * ANNs have evolved into a broad family of techniques that have advanced the state of the art across multiple domains.<ref name="ref_9792" /> | ||
+ | * Neural architecture search (NAS) uses machine learning to automate ANN design.<ref name="ref_9792" /> | ||
+ | * Because of their ability to reproduce and model nonlinear processes, Artificial neural networks have found applications in many disciplines.<ref name="ref_9792" /> | ||
+ | * The convergence behavior of certain types of ANN architectures are more understood than others.<ref name="ref_9792" /> | ||
+ | * A fundamental objection is that ANNs do not sufficiently reflect neuronal function.<ref name="ref_9792" /> | ||
+ | * A central claim of ANNs is that they embody new and powerful general principles for processing information.<ref name="ref_9792" /> | ||
+ | * This allows simple statistical association (the basic function of artificial neural networks) to be described as learning or recognition.<ref name="ref_9792" /> | ||
+ | * Analyzing what has been learned by an ANN, is much easier than to analyze what has been learned by a biological neural network.<ref name="ref_9792" /> | ||
+ | * A single-layer feedforward artificial neural network with 4 inputs, 6 hidden and 2 outputs.<ref name="ref_9792" /> | ||
+ | * A two-layer feedforward artificial neural network with 8 inputs, 2x8 hidden and 2 outputs.<ref name="ref_9792" /> | ||
+ | ===소스=== | ||
+ | <references /> | ||
+ | |||
[[분류:계산]] | [[분류:계산]] | ||
+ | [[분류:migrate]] |
2020년 12월 23일 (수) 00:30 기준 최신판
개요
- chain rule
- gradient descent
- neural network architectures
- backpropagation
memo
- https://en.wikipedia.org/wiki/Gradient_descent
- https://en.wikipedia.org/wiki/Stochastic_gradient_descent
- http://playground.tensorflow.org/#activation=tanh&batchSize=10&dataset=circle®Dataset=reg-plane&learningRate=0.03®ularizationRate=0&noise=0&networkShape=4,2&seed=0.05287&showTestData=false&discretize=false&percTrainData=50&x=true&y=true&xTimesY=false&xSquared=false&ySquared=false&cosX=false&sinX=false&cosY=false&sinY=false&collectStats=false&problem=classification&initZero=false
노트
- Artificial neural networks (ANN) are a buzzword in machine learning right now — both for the technical expert and the everyday user.[1]
- Today, ANNs are growing in popularity due to the increased amount of data and computing power available.[1]
- The input layer represents the data that we feed the ANN.[1]
- ANNs are used in not only cutting edge machine learning applications, but in situations and applications that have been around for decades.[1]
- An ANN with the name of MADALINE was actually the first one ever applied to a real world problem back in 1959.[1]
- For this application, the ANN must be trained to accurately understand what people with different voices and accents are saying.[1]
- Today, there are multiple programs that can build out ANNs for you.[1]
- ANNs depend highly on activation functions, which allow them to follow a non-linear model and learn data very quickly.[1]
- A deep understanding of these concepts is needed to build and implement an ANN.[1]
- A typical artificial neural network will likely only have two or three hidden layers of nodes.[2]
- Artificial neural networks don’t use task-specific rules or linear reasoning.[2]
- So, the ANN gets lots of input along with the answers it should come up with.[2]
- Asking ‘what is an artificial neural network’ invites a host of complex answers.[2]
- Unlike other machine learning algorithms, which may organize data or crunch numbers, neural networks learn from experience.[3]
- Remember the single hidden layer in the artificial neural network?[3]
- Many of the biggest advances in AI are driven by artificial neural networks.[4]
- These ANNs are capable of extracting complex patterns from data, applying these patterns to unseen data to classify/recognize the data.[4]
- Deep neural networks take the basic form of the MLP and make it larger by adding more hidden layers in the middle of the model.[4]
- The multiple hidden layers of a deep neural network are able to interpret more complex patterns than the traditional multilayer perceptron.[4]
- Different layers of the deep neural network learn the patterns of different parts of the data.[4]
- A Convolutional Neural Network is a special type of neural network that is adept at interpreting the patterns found within images.[4]
- On the other hand, artificial neural networks are built on the principle of bio-mimicry.[5]
- The development of new algorithms to model such processes is needed, and ANNs can play a major role.[6]
- The main topic of this article will be the extended version of neural networks, known as deep learning.[7]
- ANNs consist of many interconnected computing units, called neurons, and are functional approximates that map inputs to outputs.[7]
- An artificial neural network (ANN) is similar, but a computing network in science that resembles the properties of the human brain.[7]
- Most neural networks today are organized in layers of nodes, and each node moves meaningfully within and outside the network.[7]
- ANNs are function approximators, mapping inputs to outputs, and are composed of many interconnected computational units, called neurons.[8]
- This tutorial provides an introduction to ANNs and discusses a few key features to consider.[8]
- This tutorial provides a high level overview of ANNs, an analytic technique that is currently undergoing rapid development and research.[8]
- A brief description of the biologic neuron, which ANNs attempt to mimic.[8]
- How ANNs learn: Introducing the back-propagation algorithm.[8]
- The output signal then moves to a raw output or other neurons depending on specific ANN architecture.[8]
- ANNs are often described as having an Input layer, Hidden layer, and Output layer.[8]
- Within the hidden layer is where a majority of the ‘learning’ takes place, and the output layer displays the results of the ANN.[8]
- Each of the black lines with correspond to a weight, , and describe how artificial neurons are connections to one another within the ANN.[8]
- top-left and top-right plots show two possible ANN configurations.[8]
- In the top-right ANN we have a network with two hidden layers.[8]
- Activation functions enable the ANN to learn non-linear properties present in the data.[8]
- The output ( ) can feed into the output layer of a neural network, or in deeper architectures may feed into additional hidden layers.[8]
- The choice of the activation function governs the required data scaling necessary for ANN analysis.[8]
- We have described the structure of ANNs, however, we have not touched on how these networks learn.[8]
- To begin training our notional single-layer one-neuron neural network we initially randomly assign weights.[8]
- We then run the neural network with the random weights and record the outputs generated.[8]
- Once we have our ANN output values ( ) we can compare them to the data set output values ( ).[8]
- Recall that our neural network is simply a function, .[8]
- Once the weights are updated, we can re-run the neural network with the update weight values.[8]
- The back-propagation algorithm (described in the previous paragraphs) is the fundamental process by which an ANN learns.[8]
- Given a ANN, back-propagation requires operations for -hidden layers, and operations for the number of input weights.[8]
- ANN hyperparameters are settings used to control how a neural network performs.[8]
- Hyperparameters dictate how well neural networks are able to learn the underlying functions they approximate.[8]
- Generally, when ANNs are developed they are evaluated against one data set that has been split into a training data set and a test data set.[8]
- When testing ANN hyperparameters we generally see multiple ANNs created with different hyperparameters trained on the training data set.[8]
- When testing ANNs we are concerned with two types of error, under-fitting and over-fitting.[8]
- An ANN exhibiting under-fitting is a neural network in which the error rate of the training data set is very high.[8]
- An ANN exhibiting over-fitting has a large gap between the error rates on the training data set and the error rates on the test data set.[8]
- Adjusting these ANN hyperparameters is an adjustment of the neural networks capacity.[8]
- An over-capacity ANN is likely to show over-fitting when tested against the test data set.[8]
- Next you’ll learn how to apply ANNs to predict continuous and categorical outcomes.[8]
- The first artificial neural network was invented in 1958 by psychologist Frank Rosenblatt.[9]
- Artificial neural networks typically start out with randomized weights for all their neurons.[9]
- A back-propagation ANN, conversely, is trained by humans to perform specific tasks.[9]
- During the training period, the teacher evaluates whether the ANN's output is correct.[9]
- Implemented on a single computer, an artificial neural network is typically slower than a more traditional algorithmic solution.[9]
- The parallel architecture also allows ANNs to process very large amounts of data very efficiently.[9]
- Artificial neural networks have proved useful in a variety of real-world applications that deal with complex, often incomplete data.[9]
- In addition, recent programs for text-to-speech have utilized ANNs.[9]
- ANNs are used to discover other kinds of crime, too.[9]
- Bomb detectors in many U.S. airports use ANNs to analyze airborne trace elements to sense the presence of explosive chemicals.[9]
- A neural network breaks down the input into layers of abstraction.[10]
- Understanding the human brain is critical for understanding ANN.[11]
- With ANN, artificial systems mimic the same functionality of the human brain.[11]
- ANNs are used in a number of applications today.[11]
- These artificial neural networks try to replicate only the most basic elements of this complicated, versatile, and powerful organism.[12]
- They are significantly more complex than the existing artificial neurons that are built into today's artificial neural networks.[12]
- To do this, the basic unit of neural networks, the artificial neurons, simulate the four basic functions of natural neurons.[12]
- All artificial neural networks are constructed from this basic building block - the processing element or the artificial neuron.[12]
- Basically, all artificial neural networks have a similar structure or topology as shown in Figure 2.4.1.[12]
- Definition - What does Artificial Neural Network (ANN) mean?[13]
- For a more detailed introduction to neural networks, Michael Nielsen’s Neural Networks and Deep Learning is a good place to start.[14]
- We’ve open sourced it on GitHub with the hope that it can make neural networks a little more accessible and easier to learn.[14]
- Artificial neural networks (ANNs) are comprised of a node layers, containing an input layer, one or more hidden layers, and an output layer.[15]
- Most deep neural networks are feedforward, meaning they flow in one direction only, from input to output.[15]
- The perceptron is the oldest neural network, created by Frank Rosenblatt in 1958.[15]
- Feedforward neural networks, or multi-layer perceptrons (MLPs), are what we’ve primarily been focusing on within this article.[15]
- As a result, it’s worth noting that the “deep” in deep learning is just referring to the depth of layers in a neural network.[15]
- The history of neural networks is longer than most people think.[15]
- Neural network, a computer program that operates in a manner inspired by the natural neural network in the brain.[16]
- The objective of such artificial neural networks is to perform such cognitive functions as problem solving and machine learning.[16]
- In 1954 Belmont Farley and Wesley Clark of the Massachusetts Institute of Technology succeeded in running the first simple neural network.[16]
- The primary appeal of neural networks is their ability to emulate the brain’s pattern-recognition skills.[16]
- The output of a neural network depends on the weights of the connections between neurons in different layers.[16]
- Artificial neural networks can also be thought of as learning algorithms that model the input-output relationship.[17]
- An artificial neural network transforms input data by applying a nonlinear function to a weighted sum of the inputs.[17]
- For example, a neural network performing lane detection in a car needs to have low latency and a small runtime application.[17]
- Connectionist models of human perception and cognition utilize artificial neural networks.[17]
- The first, middle, and last layers of a neural network are called the input layer, hidden layer, and output layer respectively.[17]
- Artificial neural networks use different layers of mathematical processing to make sense of the information it’s fed.[18]
- The majority of neural networks are fully connected from one layer to another.[18]
- In order for ANNs to learn, they need to have a tremendous amount of information thrown at them called a training set.[18]
- There are several ways artificial neural networks can be deployed including to classify information, predict outcomes and cluster data.[18]
- Google uses a 30-layered neural network to power Google Photos as well as to power its “watch next” recommendations for YouTube videos.[18]
- Facebook uses artificial neural networks for its DeepFace algorithm, which can recognise specific faces with 97% accuracy.[18]
- Generally, the working of a human brain by making the right connections is the idea behind ANNs.[19]
- Basically, we can consider ANN as nonlinear statistical data.[19]
- ANN stands for Artificial Neural Networks.[19]
- Although, the structure of the ANN affected by a flow of information.[19]
- In this ANN Tutorial, we will learn Artificial Neural Network.[19]
- Here, we will explore the working and structures of ANN.[19]
- As a result, we can say that ANNs are composed of multiple nodes.[19]
- In this particular Artificial Neural Network, it allows feedback loops.[19]
- Artificial Neural Network used to perform a various task.[19]
- Aerospace Generally, we use ANN a for Autopilot aircrafts.[19]
- In various ways, we use ANN an in the military.[19]
- Basically , we use an Artificial neural network in electronics in many ways.[19]
- Thus, we use an Artificial neural network in many ways.[19]
- Generally, we use an Artificial neural network in transportation in many ways.[19]
- It also uses an ANN in pattern Recognition.[19]
- Yes, that’s why there is a need to use big data in training neural networks.[20]
- A neural network is a network of artificial neurons programmed in software.[20]
- Let’s take an example of a neural network that is trained to recognize dogs and cats.[20]
- Another common question I see floating around – neural networks require a ton of computing power, so is it really worth using them?[21]
- As you can see here, ANN consists of 3 layers – Input, Hidden and Output.[21]
- Artificial Neural Network is capable of learning any nonlinear function.[21]
- ANN loses the spatial features of an image.[21]
- In this article, I have discussed the importance of deep learning and the differences among different types of neural networks.[21]
- The input layer is where rules are predetermined and representative examples are given to show the ANN what the output should look like.[22]
- Looking at an analogy may be helpful in understanding neural networks better.[22]
- Most deep learning methods use neural network architectures, which is why it is often referred to as deep neural networks.[22]
- These inputs create electric impulses, which quickly travel through the neural network.[23]
- ANNs are composed of multiple nodes, which imitate biological neurons of human brain.[23]
- ANNs are capable of learning, which takes place by altering weight values.[23]
- It involves a teacher that is scholar than the ANN itself.[23]
- The ANN comes up with guesses while recognizing.[23]
- Then the teacher provides the ANN with the answers.[23]
- The ANN makes a decision by observing its environment.[23]
- The first trainable neural network, the Perceptron, was demonstrated by the Cornell University psychologist Frank Rosenblatt in 1957.[24]
- The recent resurgence in neural networks — the deep-learning revolution — comes courtesy of the computer-game industry.[24]
- Artificial neural networks (ANNs) are computational models that are loosely inspired by their biological counterparts.[25]
- In recent years, major breakthroughs in ANN research have transformed the machine learning landscape from an engineering perspective.[25]
- At the same time, scientists have started to revisit ANNs as models of neural information processing in biological agents.[25]
- We welcome contributions that are of direct relevance to neuroscientists that use ANNs as a model of neural information processing.[25]
- As you can see, with neural networks, we’re moving towards a world of fewer surprises.[26]
- This is because a neural network is born in ignorance.[26]
- Now, that form of multiple linear regression is happening at every node of a neural network.[26]
- While neural networks working with labeled data produce binary output, the input they receive is often continuous.[26]
- Artificial intelligence (AI) pyramid illustrates the evolution of ML approach to ANN and leading to deep learning (DL).[27]
- The basic concept of node and neutron has been explained, with the help of diagrams, leading to the ANN model and its operation.[27]
- Literature depicts that ML, ANN and deep learning (DL) falls under the pyramid of AI and shown in Figure 1.[27]
- Under ANN, DL has gained much importance among researchers.[27]
- DL is a complex network set of ANN with various layers of processing, which improves the results by developing high levels of insight.[27]
- The origins of all the work on ANN are in neurobiological studies that date back to about a century ago.[27]
- A brief overview of evolution in ANN and significant milestones are shown in the timeline, as shown in Figures 3 and 4.[27]
- Literature depicts that, in the 1980s, very few researchers were working on deep NNs, and it gained popularity in the early 1990s.[27]
- Since then, a large number of research articles have been published on applications of ANN and this journey is on-going.[27]
- The architecture of ANN is stimulated by the framework of biological neurons, like in the human brain.[27]
- Likewise, the ANN is a framework of interlinked nodes, similar to neurons, forming a network model.[27]
- ANN operations are not based on explicit rules and outputs are generated by trial and error procedures through sequential computations.[27]
- To comprehend the basic structure of ANN, firstly, the understanding of ‘node’ is necessary.[27]
- Figure 6 represents the general model of ANN, which is stimulated by a biological neuron.[27]
- Figure 6 shows that there are three layers in ANN called the input layer, the output layer and the hidden layer.[27]
- In the ANN, the processing part is performed in the hidden layer.[27]
- Generally speaking, each ANN has three main components, i.e., node character, network topology and the learning rules.[27]
- The interconnecting network model, between the nodes of ANN, with each other, is called the topology (or architecture).[27]
- ANN is composed of input layers, hidden layers and output layers, as already discussed in Figure 6.[27]
- A single-layer ANN, with a single output, is known as Perceptron.[27]
- A conceptual model for layers and ANN topology is shown in Figure 7.[27]
- Also, it can be seen that there is L number of hidden layers in the ANN model.[27]
- ‘i’ as node number, i.e., from 1 to i. Y is the output for the mentioned ANN model.[27]
- 3.2.1 Perceptron and multi-layer architectures A single-layered ANN, with a single output, is known as the perceptron.[27]
- Multi-layer perceptrons (MLPs) are the most commonly used architecture for ANN.[27]
- Figure 9 shows the ANN model for feedback network connections.[27]
- The training of the ANN is accomplished through a learning process.[27]
- In this process, the ANN model adjusts its weights, against the supplied inputs, thus producing outputs similar to inputs.[27]
- Unsupervised ANN models are used in diagnosing diseases, image segmentation and many more.[27]
- The primary reason for ANN popularity is due to approximated data output.[27]
- There are five main steps for the approximation function in the ANN model, as given below.[27]
- During the training process, ANN might suffer from the overfitting and underfitting.[27]
- 5.4 Simulation Simulation is the ultimate goal of applying ANN networks.[27]
- It is the representation of predicted output data for an ANN model.[27]
- The validation set is used to inform the ANN when training is to be terminated (when the minimum error point is achieved).[27]
- The test set provides an entirely independent way of examining the precision of the ANN.[27]
- The test set is a set of sample data that is used for the evaluation of the ANN model.[27]
- The biases and weights are the parameters of the network that are required to be adjusted before operating an ANN.[27]
- These parameters can be modified by using either supervised or unsupervised approach for any ANN model.[27]
- For training purpose, the supervised learning process is generally considered for determining biases and weights of an ANN network.[27]
- The supervised training process of an ANN network could be attained by using delta rule.[27]
- The backpropagation algorithm is mostly used for the application of delta rule for the training process of an ANN.[27]
- The ANN training can be achieved either by batch training or incremental training.[27]
- CNNs are very much similar to ANN that can be observed as the acyclic graph in the form of a well-arranged collection of neurons.[27]
- 7.2 Recurrent neural network (RNN) RNNs are used for the tasks that require consecutive sequential inputs for processing.[27]
- A simple ANN model was developed using Python.[27]
- Conclusions Operation of the ANN model is the simulation of the human brain, and they fall under the knowledge domain of AI.[27]
- The popularity of ANN models were increased in the early 1990s, and many studies have been done since.[27]
- The basic ANN model has three main layers, and the main process is performed in the middle layer known as the hidden layer.[27]
- The output of the ANN model is very much dependent on the characteristics and function it carries under the hidden layer.[27]
- The ANN models can perform supervised learning as well as unsupervised learning depending upon the task.[27]
- Output accuracy of the ANN models is very much dependent on the number of hidden layers and the number of epochs.[27]
- This ANN technology, combined with other advanced and AI knowledge areas, is making life easier in almost every domain.[27]
- In other words, the neural network uses the examples to automatically infer rules for recognizing handwritten digits.[28]
- In this chapter we'll write a computer program implementing a neural network that learns to recognize handwritten digits.[28]
- We're focusing on handwriting recognition because it's an excellent prototype problem for learning about neural networks in general.[28]
- But how can we devise such algorithms for a neural network?[28]
- In the next section I'll introduce a neural network that can do a pretty good job classifying handwritten digits.[28]
- Up to now, we've been discussing neural networks where the output from one layer is used as input to the next layer.[28]
- Having defined neural networks, let's return to handwriting recognition.[28]
- To understand why we do this, it helps to think about what the neural network is doing from first principles.[28]
- Now that we have a design for our neural network, how can it learn to recognize digits?[28]
- We'll use the test data to evaluate how well our neural network has learned to recognize digits.[28]
- So for now we're going to forget all about the specific form of the cost function, the connection to neural networks, and so on.[28]
- the biggest neural networks have cost functions which depend on billions of weights and biases in an extremely complicated way.[28]
- How can we apply gradient descent to learn in a neural network?[28]
- In online learning, a neural network learns from just one training input at a time (just as human beings do).[28]
- The centerpiece is a Network class, which we use to represent a neural network.[28]
- """Train the neural network using mini-batch stochastic gradient descent.[28]
- ""Return the number of test inputs for which the neural network outputs the correct result.[28]
- The transcript shows the number of test images correctly recognized by the neural network after each epoch of training.[28]
- We might worry not only about the learning rate, but about every other aspect of our neural network.[28]
- Or maybe it's impossible for a neural network with this architecture to learn to recognize handwritten digits?[28]
- You need to learn that art of debugging in order to get good results from neural networks.[28]
- This is a nice data format, but for use in neural networks it's helpful to modify the format of the ``training_data`` a little.[28]
- Based on ``load_data``, but the format is more convenient for use in our implementation of neural networks.[28]
- Indeed, it means that the SVM is performing roughly as well as our neural networks, just a little worse.[28]
- At present, well-designed neural networks outperform every other technique for solving MNIST, including SVMs.[28]
- While our neural network gives impressive performance, that performance is somewhat mysterious.[28]
- To put these questions more starkly, suppose that a few decades hence neural networks lead to artificial intelligence (AI).[28]
- Processing units make up ANNs, which in turn consist of inputs and outputs.[29]
- Artificial neural networks are built like the human brain, with neuron nodes interconnected like a web.[29]
- An ANN has hundreds or thousands of artificial neurons called processing units, which are interconnected by nodes.[29]
- An ANN initially goes through a training phase where it learns to recognize patterns in data, whether visually, aurally, or textually.[29]
- Artificial neural networks are paving the way for life-changing applications to be developed for use in all sectors of the economy.[29]
- Artificial intelligence platforms that are built on ANNs are disrupting the traditional ways of doing things.[29]
- Artificial neural networks have been applied in all areas of operations.[29]
- ANNs have been highly efficient in offering solutions to problems, where traditional models have failed or are very complicated to build.[30]
- Due to the nonlinear nature of the ANNs, they are able to express much more complex phenomena than some linear modeling techniques.[30]
- One of the most critical aspects of the use of ANN as a modeling tool is the level of knowledge needed.[30]
- In general, limited expertise exists in modeling with ANN for practical applications.[30]
- The ANN is one of many versatile tools to meet the demand in drug discovery modeling.[31]
- Compared to a traditional regression approach, the ANN is capable of modeling complex nonlinear relationships.[31]
- If you’ve spent any time reading about artificial intelligence, you’ll almost certainly have heard about artificial neural networks.[32]
- Artificial neural networks are one of the main tools used in machine learning.[32]
- There are multiple types of neural network, each of which come with their own specific use cases and levels of complexity.[32]
- In the same way that we learn from experience in our lives, neural networks require data to learn.[32]
- In most cases, the more data that can be thrown at a neural network, the more accurate it will become.[32]
- When researchers or computer scientists set out to train a neural network, they typically divide their data into three sets.[32]
- The biggest issue, however, is that neural networks are “black boxes,” in which the user feeds in data and receives answers.[32]
- A hyperparameter is a setting that affects the structure or operation of the neural network.[33]
- When training neural networks, like in other machine learning techniques, we try to balance between bias and variance.[33]
- Another meaning of bias is a “ bias neuron ” which is used in every layer of the neural network.[33]
- Source data fed into the neural network, with the goal of making a decision or prediction about the data.[33]
- Artificial Neural Networks (ANN) is a supervised learning system built of a large number of simple elements, called neurons or perceptrons.[33]
- However, for large neural networks, a training algorithm is needed that is very computationally efficient.[33]
- In a neural network, inputs, which are typically real values, are fed into the neurons in the network.[33]
- An activation function is a mathematical equation that determines the output of each element (perceptron or neuron) in the neural network.[33]
- Classic activation functions used in neural networks include the step function (which has a binary input), sigmoid and tanh.[33]
- Underfitting happens when the neural network is not able to accurately predict for the training set, not to mention for the validation set.[33]
- A high bias means the neural network is not able to generate correct predictions even for the examples it trained on.[33]
- In each layer of the neural network, a bias neuron is added, which simply stores a value of 1.[33]
- To understand classification with neural networks let’s cover some other common classification algorithms.[33]
- For certain classification problems, neural networks can provide improved performance compared to other algorithms.[33]
- Essentially, any regression equation can be modeled by a neural network.[33]
- Can you use a neural network to run a regression?[33]
- The short answer is yes – neural networks can generate a model that approximates any regression function.[33]
- A Recurrent Neural Network (RNN) helps neural networks deal with input data that is sequential in nature.[33]
- An artificial neural network is an interconnected group of nodes, inspired by a simplification of neurons in a brain .[34]
- Successive adjustments will cause the neural network to produce output which is increasingly similar to the target output.[34]
- An artificial neural network consists of a collection of simulated neurons.[34]
- ANNs are composed of artificial neurons which are conceptually derived from biological neurons.[34]
- ANNs have evolved into a broad family of techniques that have advanced the state of the art across multiple domains.[34]
- Neural architecture search (NAS) uses machine learning to automate ANN design.[34]
- Because of their ability to reproduce and model nonlinear processes, Artificial neural networks have found applications in many disciplines.[34]
- The convergence behavior of certain types of ANN architectures are more understood than others.[34]
- A fundamental objection is that ANNs do not sufficiently reflect neuronal function.[34]
- A central claim of ANNs is that they embody new and powerful general principles for processing information.[34]
- This allows simple statistical association (the basic function of artificial neural networks) to be described as learning or recognition.[34]
- Analyzing what has been learned by an ANN, is much easier than to analyze what has been learned by a biological neural network.[34]
- A single-layer feedforward artificial neural network with 4 inputs, 6 hidden and 2 outputs.[34]
- A two-layer feedforward artificial neural network with 8 inputs, 2x8 hidden and 2 outputs.[34]
소스
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Artificial Neural Networks for Machine Learning
- ↑ 2.0 2.1 2.2 2.3 ELI5: what is an artificial neural network?
- ↑ 3.0 3.1 Artificial Neural Networks: What Every Marketer Should Know
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 What are Neural Networks?
- ↑ What does Training Neural Networks mean?
- ↑ Artificial Neural Networks in Biological and Environmental Analysis
- ↑ 7.0 7.1 7.2 7.3 Artificial Neural Networks (ANN)
- ↑ 8.00 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.10 8.11 8.12 8.13 8.14 8.15 8.16 8.17 8.18 8.19 8.20 8.21 8.22 8.23 8.24 8.25 8.26 8.27 8.28 8.29 8.30 8.31 Artificial Neural Network Fundamentals · UC Business Analytics R Programming Guide
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 Artificial Neural Networks
- ↑ What Is a Neural Network?
- ↑ 11.0 11.1 11.2 What is an artificial neural network?
- ↑ 12.0 12.1 12.2 12.3 12.4 What are Artificial Neural Networks
- ↑ What is an Artificial Neural Network (ANN)?
- ↑ 14.0 14.1 A Neural Network Playground
- ↑ 15.0 15.1 15.2 15.3 15.4 15.5 What are Neural Networks?
- ↑ 16.0 16.1 16.2 16.3 16.4 Neural network | computing
- ↑ 17.0 17.1 17.2 17.3 17.4 Artificial Neural Network
- ↑ 18.0 18.1 18.2 18.3 18.4 18.5 What Are Artificial Neural Networks - A Simple Explanation For Absolutely Anyone
- ↑ 19.00 19.01 19.02 19.03 19.04 19.05 19.06 19.07 19.08 19.09 19.10 19.11 19.12 19.13 19.14 What is Artificial Neural Network
- ↑ 20.0 20.1 20.2 What is a neural network? A computer scientist explains
- ↑ 21.0 21.1 21.2 21.3 21.4 Types of Neural Networks
- ↑ 22.0 22.1 22.2 Artificial Neural Networks
- ↑ 23.0 23.1 23.2 23.3 23.4 23.5 23.6 Artificial Intelligence
- ↑ 24.0 24.1 Explained: Neural networks
- ↑ 25.0 25.1 25.2 25.3 Artificial Neural Networks as Models of Neural Information Processing
- ↑ 26.0 26.1 26.2 26.3 A Beginner's Guide to Neural Networks and Deep Learning
- ↑ 27.00 27.01 27.02 27.03 27.04 27.05 27.06 27.07 27.08 27.09 27.10 27.11 27.12 27.13 27.14 27.15 27.16 27.17 27.18 27.19 27.20 27.21 27.22 27.23 27.24 27.25 27.26 27.27 27.28 27.29 27.30 27.31 27.32 27.33 27.34 27.35 27.36 27.37 27.38 27.39 27.40 27.41 27.42 27.43 27.44 27.45 27.46 27.47 27.48 27.49 27.50 27.51 27.52 Data Processing Using Artificial Neural Networks
- ↑ 28.00 28.01 28.02 28.03 28.04 28.05 28.06 28.07 28.08 28.09 28.10 28.11 28.12 28.13 28.14 28.15 28.16 28.17 28.18 28.19 28.20 28.21 28.22 28.23 28.24 28.25 28.26 Neural networks and deep learning
- ↑ 29.0 29.1 29.2 29.3 29.4 29.5 29.6 Artificial Neural Network (ANN)
- ↑ 30.0 30.1 30.2 30.3 Artificial Neural Network - an overview
- ↑ 31.0 31.1 Overview of Artificial Neural Networks
- ↑ 32.0 32.1 32.2 32.3 32.4 32.5 32.6 What is an artificial neural network? Here’s everything you need to know
- ↑ 33.00 33.01 33.02 33.03 33.04 33.05 33.06 33.07 33.08 33.09 33.10 33.11 33.12 33.13 33.14 33.15 33.16 33.17 Complete Guide to Artificial Neural Network Concepts & Models
- ↑ 34.00 34.01 34.02 34.03 34.04 34.05 34.06 34.07 34.08 34.09 34.10 34.11 34.12 34.13 Artificial neural network