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layer elements, and the output mode is as equal as the input mode.Therefore, the value of the hidden layer neuron and the corresponding weight vector can output a vector that is the same as the original input pattern.When the number of neurons in the hidden layer is small, it means that the hidden layer can represent the input pattern with fewer numbers, which is actually compression.The first layer is the input layer, the middle layer is the hidden layer, and the
regression, and then the parameters are calculated by the gradient descent algorithm.1,error Back propagation algorithm:We know that the gradient descent algorithm consists of two steps:(1), the partial derivative of the parameter theta is obtained for cost function;(2), the parameter theta is updated and adjusted according to the partial derivative;Error Back propagation algorithm provides an efficient method for partial derivative.For example, in the neur
ilsvrc champion? In the vggnet, 2014 ilsvrc competition model, image recognition is slightly inferior to googlenet, but it has a great effect in many image conversion learning problems (such as object detection ).
Fine-tuning of Convolutional Neural Networks
What is fine-tuning?Fine-tuning is to use the weights or partial weights that have been used for other targets, pre-trained models, and start training as the initial values.
So why don't we rando
placed in 10 folders, the folder name corresponds to the number of the handwritten digital image, each number 500, each image pixel is 28*28. Samples:
Identification process:
First, we need to process the data. This is mainly the process of reading images and Feature Extraction in batches. There are many feature extraction methods. Here we only select the simplest method to achieve this, then a neural netwo
formula to update the weights, after the update of the new weights will be iterated to calculate the network output error, and then the reverse transmission of the error, update the weight, so it can continue.The following is the pseudo code of the algorithm (just the structure of the two-layer network, multilayer words have to increase the cycle):This has been in the
Neural network and support vector machine for deep learningIntroduction: Neural Networks (neural network) and support vector machines (SVM MACHINES,SVM) are the representative methods of statistical learning. It can be thought that neura
processor can be much faster than other libraries that do not support fixed-point operations.Although FANN is a pure C language, but according to the object-oriented thinking framework, interface design is very good. Have more detailed documentation, easy to use. and has been supported in more than 20 programming language environments, such as C #, JAVA, Delphi, PYTHON, PHP, PERL, RUBY, Javascript, Matlab, R and so on.The following is a very simple e
With the neural network of small partners know that the data needs to be normalized, but why to do normalization, the problem has always been ambiguous, and there is no more than the answer on the net, the small series spent a period of time, made some research, give us a careful analysis, why do normalization:
1. Numerical problems.
There is no doubt that normalization can indeed avoid some unnecessary n
://www.cs.toronto.edu /~ Graves/preprinthistory.
The development of recurrent neural networks.
VanillaRNN-> Enhanced the hidden layer function-> Simple RNN-> GRU-> LSTM-> CW-RNN-> Bidirectional deepening Network-> Bidirectional RNN-> Keep Bidrectional RNN-> Combination of the two: DBLSTMRecurrent Neural Networks, Part 1-Introduction to RNNs http://www.wildml.com/
rate can reach 97% +The above can be UFLDL on the implementation of CNN, the most important thing is to figure out each layer in each process needs to be done, I summarize in the article at the beginning of the table ~matlab give me a big feeling is the matrix of demension match, sometimes know the formula is what kind of, However, to consider the dimensions of the matrix, the two-dimensional match matrix can be multiplied or added, but the benefit i
This chapter does not involve too many neural network principles, but focuses on how to use the Torch7 neural networkFirst require (equivalent to the C language include) NN packet, the packet is a dependency of the neural network, remember to add ";" at the end of the statem
convolutional Neural Network Primer (1)
Original address : http://blog.csdn.net/hjimce/article/details/47323463
Author : HJIMCE
convolutional Neural Network algorithm is an n-year-old algorithm, only in recent years because of deep learning related algorithms for the training of multi-layered networks to provide a new
A course of recurrent neural Network (1)-RNN Introduction
source:http://www.wildml.com/2015/09/recurrent-neural-networks-tutorial-part-1-introduction-to-rnns/
As a popular model, recurrent neural Network (Rnns) has shown great app
Dnns." ARIXV preprint, Arxiv:1608.04493v1, 2016.
[3] Yu, Kai. "A tutorial on the deep learning." China Workshop on machine learning and applications, 2012.
Lei Feng Network Note: This article by the Deep Learning journal ER authorized Lei Feng Network (search "Lei Feng Network" public attention) released, if
weight is updated with the formula: 6, the offset update offset formula is:
Implicit layer-to-output layer offset update
Then the offset's update formula is:
Bias update for input layer to hidden layer
Where the offset of the update formula is: 7, to determine whether the algorithm iteration end there are many ways to determine whether the algorithm has been convergent, the common has a specified iteration of algebra, to determine whether the difference between the a
, we can directly use the full connection of the neural network, to carry out the follow-up of these 120 neurons, the following specific how to do, as long as the knowledge of multi-layer sensors understand, do not explain.
The above structure, is only a reference, in the real use, each layer feature map needs how many, volume kernel size selection, as well as the pool when the sample rate to how much, and
Hopfield Neural network usage instructions.There are two characteristics of this neural network:1, output value is only 0, 12,hopfield not entered (input)Here's a second feature, what do you mean no input? Because in the use of Hopfield network, more used for image simulatio
://www.ibm.com/developerworks/cn/java/j-lo-robocode3/index.html
Artificial Intelligence Java tank robot series: neural networks, lower
Http://www.ibm.com/developerworks/cn/java/j-lo-robocode4/
Constructing a neural network using Python-the CNN can reconstruct distorted patterns and eliminate noise.
Http://www.ibm.com/developerworks/cn/linux/l-neurnet/
Provide bas
chooses the S-type tangent function Tansig as the excitation function of the hidden-layer neurons. As the output of the network is within the range of [-1, 1], the predictive model chooses the S-type logarithmic function Tansig as the excitation function of the output layer neuron.Implementation of 4.4.2.2.3 ModelThis prediction selects the Neural Network Toolbo
BP (backward propogation) neural networkSimple to understand, neural network is a high-end fitting technology. There are a lot of tutorials, but in fact, I think it is enough to look at Stanford's relevant learning materials, and there are better translations at home: Introduction to Artificial neural
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