similar to the dimensionality reduction) method. Maximum pooling divides the input image into overlapping image matrix blocks, and each sub-region outputs its maximum value. The two reasons why the maximum pooling method is very effective in the visual processing problem are:(1) Reduce the computational complexity of the upper level by reducing the non-maximum value.(2) The result of pooling supports translation invariance. In the convolution layer, each pixel point has 8 orientations that can
ReproducedUser-awareLinks: https://www.zhihu.com/question/24827633/answer/91489990Source: KnowCopyright belongs to the author. Commercial reprint please contact the author for authorization, non-commercial reprint please specify the source.is usually explained by the chain rules .such as the following neural network
Forward propagation
For nodes, the net input is as follows:
This tutorial uses lasagne, a tool based on Theano to quickly build a neural network:1, the realization of several neural network construction2, Discussion data augmentation method3, discuss the importance of learning "potential"4, Pre-discussion training (pre-training)The a
http://cv-tricks.com/tensorflow-tutorial/save-restore-tensorflow-models-quick-complete-tutorial/What is a TF model:
After training a neural network model, you will save the model for future use or deployment to the product. So, what is the TF model. The TF model basically contains
Reference Pengliang Teacher's video tutorial: Reprint please indicate the source and Pengliang teacher OriginalVideo Tutorials: Http://pan.baidu.com/s/1kVNe5EJ
1. About the nonlinear transformation equation (non-linear transformation function)The sigmoid function (the S-curve) is used as activation functions:1.1 Hyperbolic function (TANH) 1.2 logical functions (logistic function) 2. Implement a simple neural
outputLength. Training instances that has inputs longer than I or outputsLonger than O'll be pushed to the next bucket and padded accordingly.We assume the list is sorted, e.g., [(2, 4), (8, 16)].
Size:number of units in each layer of the model.
Num_layers:number of layers in the model.
Max_gradient_norm:gradients'll is clipped to maximally this norm.
Batch_size:the size of the batches used during training;The model construction is independent of batch_size, so it can beChanged
Activation function:1) sigmoid function-domain value (0,1)2) Tanh Function-domain value ( -1,1)Two functions are extended to a vector representation:-Number of network layers-Number of nodes in layer L (excluding offset units)-The connection parameter between unit J of section L and Unit I of section l+1, size-Offset of unit I of section l+1-Activation value of layer L-L unit input weighted sum (including offset unit)-SampleM-Number of samplesα-Learni
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