n import numpy as np from cs231n.layers import * from cs231n.fast_layers import * from cs231n.layer_utils import * class ThreeLayerConvNet(object): """ A three-layer convolutional network with the following architecture: conv - relu - 2x2 m…

n如果有错误,欢迎指出,不胜感激 import numpy as np from cs231n.layers import * from cs231n.layer_utils import * class TwoLayerNet(object): """ A two-layer fully-connected neural network with ReLU nonlinearity and softmax loss that uses a modular layer des…

如果有错误,欢迎指出,不胜感激. import numpy as np def affine_forward(x, w, b): 第一个最简单的 affine_forward简单的前向传递,返回 out,cache """ Computes the forward pass for an affine (fully-connected) layer. The input x has shape (N, d_1, ..., d_k) and contains a minibat…

n如果有错误,欢迎指出,不胜感激 import numpy as np """ This file implements various first-order update rules that are commonly used for training neural networks. Each update rule accepts current weights and the gradient of the loss with respect to those w…

典型的卷积神经网络. Keras傻瓜式读取数据:自动下载,自动解压,自动加载. # X_train: array([[[[ 0., 0., 0., ..., 0., 0., 0.], [ 0., 0., 0., ..., 0., 0., 0.], [ 0., 0., 0., ..., 0., 0., 0.], ..., [ 0., 0., 0., ..., 0., 0., 0.], [ 0., 0., 0., ..., 0., 0., 0.], [ 0., 0., 0., ..., 0., 0.…

零.说明: 本文的所有代码均可在 DML 找到,欢迎点星星. 注.CNN的这份代码非常慢,基本上没有实际使用的可能,所以我只是发出来,代表我还是实践过而已 一.引入: CNN这个模型实在是有些年份了,最近随着深度学习的兴起又开始焕发青春了,把imagenet测试的准确度提高了非常多,一个是Alex的工作,然后最近好像Zeiler又有突破性的成果,可惜这些我都没看过,主要是imagenet的数据太大了,我根本没有可能跑得动,所以学习的积极性有些打折扣.不说那么多,还是先实现一个最基础的CNN再说吧…

卷积神经网络(CNN)详解与代码实现 本文系作者原创,转载请注明出处:https://www.cnblogs.com/further-further-further/p/10430073.html 目录 1.应用场景 2.卷积神经网络结构 2.1 卷积(convelution) 2.2 Relu激活函数 2.3 池化(pool) 2.4 全连接(full connection) 2.5 损失函数(softmax_loss) 2.6 前向传播(forward propagation) 2.7 反向…

1.工程目录 2.导入data和input_data.py 链接:https://pan.baidu.com/s/1EBNyNurBXWeJVyhNeVnmnA 提取码:4nnl 3.CNN.py import tensorflow as tf import matplotlib.pyplot as plt import input_data mnist = input_data.read_data_sets('data/', one_hot=True) trainimg = mnist.tra…

基于tensorflow使用CNN识别MNIST 参数数量:第一个卷积层5x5x1x32=800个参数,第二个卷积层5x5x32x64=51200个参数,第三个全连接层7x7x64x1024=3211264个参数,第四个输出层1024x10=10240个参数,总量级为330万个参数,单机训练时间约为30分钟. 关于优化算法:随机梯度下降法的learning rate需要逐渐变小,因为随机抽取样本引入了噪音,使得我们在最小点处的随机梯度仍然不为0.对于batch gradient descent不…

原文地址: https://www.cnblogs.com/further-further-further/p/10430073.html --------------------------------------------------------------------------------------------------------------- 目录 1.应用场景 2.卷积神经网络结构 2.1 卷积(convelution) 2.2 Relu激活函数 2.3 池化(pool) 2…