PyTorch

25秋深度学习训练营-第3周：MobileNet_ShuffleNet

第3周：MobileNet_ShuffleNet 1.1 MobileNet V1 & V2 MobileNet_V1_V2⽹络讲解 https://www.bilibili.com/video/BV1yE411p7L7/ 参考PPT mobilenet.pdf 传统卷积神经网络，内存需求大、运算量大导致无法在移动设备以及嵌入式设备上运行核心：相比传统卷积神经网络，在准确率小幅降低的前提下大大减少模型参数与运算量。网络中的亮点： Depthwise Convolution(大大减少运算量和参数数量) 增加超参数α、β 传统卷积： DW(Depthwise)卷积：计算量比较传统卷积总计算量为： $$ D_K·D_K·M·N·D_F·D_F $$ MobileNetV1 DW+PW卷积总计算量为： $$ D_K·D_K·M·D_F·D_F+M·N·D_F·D_F $$

25秋深度学习训练营-第2周：卷积神经网络

第2周：卷积神经网络学习内容：https://oucai.club/classes/dl/week01#第2周-卷积神经网络学习视频：https://www.jianguoyun.com/p/Dde3HS8QrKKIBhi2xpEGIAA 视频学习至1小时06分，包括： CNN的基本结构：卷积、池化、全连接代码练习实验1: 使用 LeNet 对 MNIST 数据集分类代码见https://oucai.club/classes/dl/week02 Epoch [1/10], Step [100/938], Loss: 0.9421, Accuracy: 70.53% Epoch [1/10], Step [200/938], Loss: 0.2978, Accuracy: 80.96% Epoch [1/10], Step [300/938], Loss: 0.1998, Accuracy: 85.28% Epoch [1/10], Step [400/938], Loss: 0.1483, Accuracy: 87.91% Epoch [1/10], Step [500/938], Loss: 0.1318, Accuracy: 89.54% Epoch [1/10], Step [600/938], Loss: 0.1123, Accuracy: 90.72% Epoch [1/10], Step [700/938], Loss: 0.0962, Accuracy: 91.64% Epoch [1/10], Step [800/938], Loss: 0.1050, Accuracy: 92.31% Epoch [1/10], Step [900/938], Loss: 0.0876, Accuracy: 92.84% Test Loss: 0.0854, Test Accuracy: 97.36% Epoch [2/10], Step [100/938], Loss: 0.0724, Accuracy: 97.58% Epoch [2/10], Step [200/938], Loss: 0.0759, Accuracy: 97.56% Epoch [2/10], Step [300/938], Loss: 0.0701, Accuracy: 97.63% Epoch [2/10], Step [400/938], Loss: 0.0674, Accuracy: 97.72% Epoch [2/10], Step [500/938], Loss: 0.0710, Accuracy: 97.73% Epoch [2/10], Step [600/938], Loss: 0.0669, Accuracy: 97.77% Epoch [2/10], Step [700/938], Loss: 0.0625, Accuracy: 97.82% Epoch [2/10], Step [800/938], Loss: 0.0561, Accuracy: 97.88% Epoch [2/10], Step [900/938], Loss: 0.0608, Accuracy: 97.91% Test Loss: 0.0484, Test Accuracy: 98.39% Epoch [3/10], Step [100/938], Loss: 0.0442, Accuracy: 98.55% Epoch [3/10], Step [200/938], Loss: 0.0591, Accuracy: 98.39% Epoch [3/10], Step [300/938], Loss: 0.0406, Accuracy: 98.51% Epoch [3/10], Step [400/938], Loss: 0.0455, Accuracy: 98.55% Epoch [3/10], Step [500/938], Loss: 0.0498, Accuracy: 98.51% Epoch [3/10], Step [600/938], Loss: 0.0424, Accuracy: 98.51% Epoch [3/10], Step [700/938], Loss: 0.0452, Accuracy: 98.52% Epoch [3/10], Step [800/938], Loss: 0.0542, Accuracy: 98.49% Epoch [3/10], Step [900/938], Loss: 0.0410, Accuracy: 98.50% Test Loss: 0.0415, Test Accuracy: 98.62% Epoch [4/10], Step [100/938], Loss: 0.0353, Accuracy: 98.89% Epoch [4/10], Step [200/938], Loss: 0.0337, Accuracy: 98.92% Epoch [4/10], Step [300/938], Loss: 0.0398, Accuracy: 98.90% Epoch [4/10], Step [400/938], Loss: 0.0357, Accuracy: 98.89% Epoch [4/10], Step [500/938], Loss: 0.0416, Accuracy: 98.84% Epoch [4/10], Step [600/938], Loss: 0.0442, Accuracy: 98.80% Epoch [4/10], Step [700/938], Loss: 0.0336, Accuracy: 98.80% Epoch [4/10], Step [800/938], Loss: 0.0319, Accuracy: 98.85% Epoch [4/10], Step [900/938], Loss: 0.0400, Accuracy: 98.84% Test Loss: 0.0440, Test Accuracy: 98.60% Epoch [5/10], Step [100/938], Loss: 0.0287, Accuracy: 99.17% Epoch [5/10], Step [200/938], Loss: 0.0251, Accuracy: 99.23% Epoch [5/10], Step [300/938], Loss: 0.0291, Accuracy: 99.18% Epoch [5/10], Step [400/938], Loss: 0.0275, Accuracy: 99.18% Epoch [5/10], Step [500/938], Loss: 0.0351, Accuracy: 99.09% Epoch [5/10], Step [600/938], Loss: 0.0325, Accuracy: 99.07% Epoch [5/10], Step [700/938], Loss: 0.0320, Accuracy: 99.05% Epoch [5/10], Step [800/938], Loss: 0.0337, Accuracy: 99.03% Epoch [5/10], Step [900/938], Loss: 0.0245, Accuracy: 99.06% Test Loss: 0.0468, Test Accuracy: 98.52% Epoch [6/10], Step [100/938], Loss: 0.0277, Accuracy: 99.05% Epoch [6/10], Step [200/938], Loss: 0.0258, Accuracy: 99.11% Epoch [6/10], Step [300/938], Loss: 0.0264, Accuracy: 99.14% Epoch [6/10], Step [400/938], Loss: 0.0229, Accuracy: 99.18% Epoch [6/10], Step [500/938], Loss: 0.0194, Accuracy: 99.23% Epoch [6/10], Step [600/938], Loss: 0.0277, Accuracy: 99.19% Epoch [6/10], Step [700/938], Loss: 0.0233, Accuracy: 99.20% Epoch [6/10], Step [800/938], Loss: 0.0238, Accuracy: 99.20% Epoch [6/10], Step [900/938], Loss: 0.0288, Accuracy: 99.18% Test Loss: 0.0554, Test Accuracy: 98.28% Epoch [7/10], Step [100/938], Loss: 0.0193, Accuracy: 99.28% Epoch [7/10], Step [200/938], Loss: 0.0249, Accuracy: 99.28% Epoch [7/10], Step [300/938], Loss: 0.0211, Accuracy: 99.33% Epoch [7/10], Step [400/938], Loss: 0.0196, Accuracy: 99.37% Epoch [7/10], Step [500/938], Loss: 0.0257, Accuracy: 99.30% Epoch [7/10], Step [600/938], Loss: 0.0226, Accuracy: 99.30% Epoch [7/10], Step [700/938], Loss: 0.0212, Accuracy: 99.30% Epoch [7/10], Step [800/938], Loss: 0.0267, Accuracy: 99.29% Epoch [7/10], Step [900/938], Loss: 0.0181, Accuracy: 99.30% Test Loss: 0.0441, Test Accuracy: 98.65% Epoch [8/10], Step [100/938], Loss: 0.0145, Accuracy: 99.50% Epoch [8/10], Step [200/938], Loss: 0.0164, Accuracy: 99.48% Epoch [8/10], Step [300/938], Loss: 0.0179, Accuracy: 99.46% Epoch [8/10], Step [400/938], Loss: 0.0161, Accuracy: 99.44% Epoch [8/10], Step [500/938], Loss: 0.0165, Accuracy: 99.44% Epoch [8/10], Step [600/938], Loss: 0.0177, Accuracy: 99.45% Epoch [8/10], Step [700/938], Loss: 0.0211, Accuracy: 99.43% Epoch [8/10], Step [800/938], Loss: 0.0210, Accuracy: 99.41% Epoch [8/10], Step [900/938], Loss: 0.0194, Accuracy: 99.41% Test Loss: 0.0316, Test Accuracy: 99.08% Epoch [9/10], Step [100/938], Loss: 0.0100, Accuracy: 99.69% Epoch [9/10], Step [200/938], Loss: 0.0136, Accuracy: 99.63% Epoch [9/10], Step [300/938], Loss: 0.0176, Accuracy: 99.56% Epoch [9/10], Step [400/938], Loss: 0.0210, Accuracy: 99.50% Epoch [9/10], Step [500/938], Loss: 0.0144, Accuracy: 99.52% Epoch [9/10], Step [600/938], Loss: 0.0167, Accuracy: 99.50% Epoch [9/10], Step [700/938], Loss: 0.0228, Accuracy: 99.46% Epoch [9/10], Step [800/938], Loss: 0.0197, Accuracy: 99.46% Epoch [9/10], Step [900/938], Loss: 0.0136, Accuracy: 99.46% Test Loss: 0.0403, Test Accuracy: 98.86% Epoch [10/10], Step [100/938], Loss: 0.0097, Accuracy: 99.66% Epoch [10/10], Step [200/938], Loss: 0.0141, Accuracy: 99.59% Epoch [10/10], Step [300/938], Loss: 0.0089, Accuracy: 99.63% Epoch [10/10], Step [400/938], Loss: 0.0187, Accuracy: 99.59% Epoch [10/10], Step [500/938], Loss: 0.0182, Accuracy: 99.56% Epoch [10/10], Step [600/938], Loss: 0.0150, Accuracy: 99.55% Epoch [10/10], Step [700/938], Loss: 0.0113, Accuracy: 99.55% Epoch [10/10], Step [800/938], Loss: 0.0200, Accuracy: 99.51% Epoch [10/10], Step [900/938], Loss: 0.0195, Accuracy: 99.50% Test Loss: 0.0391, Test Accuracy: 98.93% Best Test Accuracy: 99.08% 经过多轮训练尝试，我们发现第十次的准确度并非最高，反而是第九次的准确度达到了99%以上 ...

25秋深度学习训练营-第1周：深度学习基础

第1周：深度学习基础学习内容：https://oucai.club/classes/dl/week01#第1周-深度学习基础学习视频：https://www.jianguoyun.com/p/Dde3HS8QrKKIBhi2xpEGIAA 学习要求：深度学习的入门知识 pytorch 基础练习，螺旋数据分类代码练习 1、视频学习学习视频：深度学习基础，主要内容包括：浅层神经⽹络：⽣物神经元到单层感知器，多层感知器，反向传播和梯度消失神经⽹络到深度学习：逐层预训练，⾃编码器和受限玻尔兹曼机 2、代码练习可以在Google Colaboratory开发Deep Learning Applications，它自带免费的Tesla K80 GPU。 1. PyTorch 基础练习什么是 PyTorch ? PyTorch是一个python库，它主要提供了两个高级功能： GPU加速的张量计算构建在反向自动求导系统上的深度神经网络 1. 定义数据 Tensor支持各种各样类型的数据，包括： torch.float32, torch.float64, torch.float16, torch.uint8, torch.int8, torch.int16, torch.int32, torch.int64 2. 定义操作凡是用Tensor进行各种运算的，都是Function 最终，还是需要用Tensor来进行计算的，计算无非是基本运算，加减乘除，求幂求余布尔运算，大于小于，最大最小线性运算，矩阵乘法，求模，求行列式基本运算包括： abs/sqrt/div/exp/fmod/pow ，及一些三角函数 cos/ sin/ asin/ atan2/ cosh，及 ceil/round/floor/trunc 等布尔运算包括： gt/lt/ge/le/eq/ne，topk, sort, max/min 线性计算包括： trace, diag, mm/bmm，t，dot/cross，inverse，svd 等在对m与v进行矩阵乘法时，报错如下原因在于在前文代码中，m的dtype为float，而v的dtype为Long 因此，将代码m @ v改为m @ v.float()，把矩阵v的dtype转化为float进行乘法操作 ...