{"id":54729,"date":"2025-08-13T10:39:38","date_gmt":"2025-08-13T02:39:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54729.html"},"modified":"2025-08-13T10:39:38","modified_gmt":"2025-08-13T02:39:38","slug":"%e7%ac%ac10%e7%ab%a0-%e8%ae%a1%e7%ae%97%e6%9c%ba%e8%a7%86%e8%a7%89%e9%a1%b9%e7%9b%ae%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54729.html","title":{"rendered":"\u7b2c10\u7ae0 \u8ba1\u7b97\u673a\u89c6\u89c9\u9879\u76ee\u5b9e\u6218"},"content":{"rendered":"<h3>10.1 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L-LE-G2\"><\/span>\u6a21\u578b\u8f6c\u6362\u4e0e\u4f18\u5316\u90e8\u7f72\u5230\u4e91\/\u8fb9\/\u7aef\u6027\u80fd\u76d1\u63a7\u6536\u96c6\u65b0\u6570\u636e\u9009\u62e9\u57fa\u7840\u6a21\u578b\u8bbe\u8ba1\u7f51\u7edc\u67b6\u6784\u6570\u636e\u91c7\u96c6\u6570\u636e\u6e05\u6d17\u6570\u636e\u6807\u6ce81. \u95ee\u9898\u5b9a\u4e492. \u6570\u636e\u6536\u96c6\u4e0e\u51c6\u59073. \u6a21\u578b\u9009\u578b\u4e0e\u8bbe\u8ba14. \u6a21\u578b\u8bad\u7ec3\u4e0e\u8c03\u4f185. \u6a21\u578b\u8bc4\u4f306. \u6a21\u578b\u90e8\u7f727. \u76d1\u63a7\u4e0e\u8fed\u4ee3<\/p>\n<h3>10.2 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(\u57fa\u4e8e\u9aa8\u9abc\u70b9)&#xff1a;\u5bf9\u6bcf\u4e2a\u4eba\u7684\u56fe\u50cf\u5757\u8fd0\u884c\u59ff\u6001\u4f30\u8ba1\u7b97\u6cd5&#xff08;\u5982OpenPose&#xff09;&#xff0c;\u63d0\u53d6\u9aa8\u9abc\u70b9\u5e8f\u5217\u3002\u5c06\u8be5\u5e8f\u5217\u8f93\u5165\u5230\u9884\u8bad\u7ec3\u597d\u7684LSTM\u6216GNN\u6a21\u578b\u4e2d&#xff0c;\u5224\u65ad\u5176\u884c\u4e3a\u7c7b\u522b\u3002<\/li>\n<li>\u65b9\u6cd5B (\u57fa\u4e8e3D CNN)&#xff1a;\u5c06\u6bcf\u4e2a\u4eba\u7684\u56fe\u50cf\u5757\u5e8f\u5217\u76f4\u63a5\u8f93\u5165\u5230\u8f7b\u91cf\u7ea7\u76843D CNN&#xff08;\u5982MobileNet3D&#xff09;\u4e2d\u8fdb\u884c\u5206\u7c7b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u7cfb\u7edf\u96c6\u6210\u4e0e\u8b66\u62a5&#xff1a;\u5f53\u884c\u4e3a\u8bc6\u522b\u6a21\u5757\u68c0\u6d4b\u5230\u5f02\u5e38\u884c\u4e3a\u65f6&#xff0c;\u7cfb\u7edf\u8bb0\u5f55\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u95f4\u3001\u5730\u70b9\u548c\u76f8\u5173\u89c6\u9891\u7247\u6bb5&#xff0c;\u5e76\u901a\u8fc7API\u3001\u77ed\u4fe1\u6216\u90ae\u4ef6\u7b49\u65b9\u5f0f\u89e6\u53d1\u8b66\u62a5\u3002<\/li>\n<li>\u90e8\u7f72&#xff1a;\u5c06\u6574\u4e2a\u5904\u7406\u6d41\u7a0b\u5c01\u88c5\u6210\u670d\u52a1&#xff0c;\u90e8\u7f72\u5728\u670d\u52a1\u5668\u4e0a&#xff0c;\u63a5\u6536\u6765\u81ea\u6444\u50cf\u5934\u7684\u5b9e\u65f6\u89c6\u9891\u6d41\u8fdb\u884c\u5206\u6790\u3002<\/li>\n<h3>10.3 \u5b9e\u6218\u6848\u4f8b\u4e8c&#xff1a;\u533b\u5b66\u5f71\u50cf\u667a\u80fd\u5206\u6790<\/h3>\n<p>\u76ee\u6807&#xff1a;\u5f00\u53d1\u4e00\u4e2a\u8f85\u52a9\u533b\u751f\u8bca\u65ad\u80ba\u90e8\u7ed3\u8282\u7684\u7cfb\u7edf&#xff0c;\u80fd\u591f\u81ea\u52a8\u5728CT\u626b\u63cf\u56fe\u50cf\u4e0a\u68c0\u6d4b\u548c\u5206\u5272\u51fa\u7591\u4f3c\u7ed3\u8282\u7684\u533a\u57df\u3002<\/p>\n<p>\u6280\u672f\u6808&#xff1a;<\/p>\n<ul>\n<li>\u6570\u636e\u683c\u5f0f&#xff1a;DICOM (\u533b\u5b66\u6570\u5b57\u6210\u50cf\u548c\u901a\u4fe1\u6807\u51c6)\u3002<\/li>\n<li>\u6838\u5fc3\u7b97\u6cd5&#xff1a;\u56fe\u50cf\u5206\u5272 (U-Net)\u3002<\/li>\n<\/ul>\n<p>\u5b9e\u73b0\u6b65\u9aa4&#xff1a;<\/p>\n<li>\u6570\u636e\u51c6\u5907&#xff1a;\u83b7\u53d6\u516c\u5f00\u7684\u533b\u5b66\u5f71\u50cf\u6570\u636e\u96c6&#xff08;\u5982LUNA16&#xff09;&#xff0c;\u8fd9\u4e9b\u6570\u636e\u901a\u5e38\u5df2\u7ecf\u7531\u4e13\u4e1a\u533b\u751f\u6807\u6ce8\u597d\u4e86\u7ed3\u8282\u7684\u4f4d\u7f6e\u548c\u8f6e\u5ed3\u3002<\/li>\n<li>\u6570\u636e\u9884\u5904\u7406&#xff1a;\n<ul>\n<li>\u8bfb\u53d6DICOM\u6587\u4ef6&#xff0c;\u63d0\u53d6\u50cf\u7d20\u6570\u636e\u548c\u5143\u4fe1\u606f\u3002<\/li>\n<li>\u8fdb\u884c\u7a97\u5bbd\u7a97\u4f4d\u8c03\u6574&#xff0c;\u4ee5\u7a81\u51fa\u80ba\u90e8\u7ec4\u7ec7\u3002<\/li>\n<li>\u5c063D\u7684CT\u626b\u63cf\u5207\u7247\u5904\u7406\u62102D\u56fe\u50cf&#xff0c;\u6216\u4fdd\u63013D\u6570\u636e\u5757\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u6a21\u578b\u8bad\u7ec3&#xff1a;\n<ul>\n<li>\u9009\u62e9U-Net\u6216\u5176\u53d8\u4f53&#xff08;\u5982U-Net&#043;&#043;, Attention U-Net&#xff09;\u4f5c\u4e3a\u5206\u5272\u6a21\u578b\u3002U-Net\u7684\u7f16\u7801\u5668-\u89e3\u7801\u5668\u7ed3\u6784\u548c\u8df3\u8dc3\u8fde\u63a5\u7279\u522b\u9002\u5408\u4e8e\u533b\u5b66\u5f71\u50cf\u5206\u5272\u4efb\u52a1&#xff0c;\u56e0\u4e3a\u5b83\u80fd\u5f88\u597d\u5730\u878d\u5408\u591a\u5c3a\u5ea6\u7684\u7279\u5f81\u3002<\/li>\n<li>\u4f7f\u7528\u6807\u6ce8\u597d\u7684\u6570\u636e\u5bf9\u6a21\u578b\u8fdb\u884c\u8bad\u7ec3\u3002\u635f\u5931\u51fd\u6570\u901a\u5e38\u4f7f\u7528Dice Loss\u6216\u5176\u7ec4\u5408&#xff0c;\u56e0\u4e3a\u5b83\u4eec\u5bf9\u7c7b\u522b\u4e0d\u5e73\u8861\u95ee\u9898&#xff08;\u7ed3\u8282\u533a\u57df\u8fdc\u5c0f\u4e8e\u80cc\u666f&#xff09;\u66f4\u9c81\u68d2\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u6a21\u578b\u8bc4\u4f30&#xff1a;\u4f7f\u7528Dice\u7cfb\u6570\u3001IOU\u7b49\u6307\u6807\u8bc4\u4f30\u6a21\u578b\u5206\u5272\u7ed3\u679c\u4e0e\u533b\u751f\u6807\u6ce8\u7684\u543b\u5408\u7a0b\u5ea6\u3002<\/li>\n<li>\u53ef\u89c6\u5316\u4e0e\u96c6\u6210&#xff1a;\u5f00\u53d1\u4e00\u4e2a\u7b80\u5355\u7684\u7528\u6237\u754c\u9762&#xff0c;\u5141\u8bb8\u533b\u751f\u4e0a\u4f20CT\u5f71\u50cf&#xff0c;\u7cfb\u7edf\u8fd0\u884c\u6a21\u578b\u540e&#xff0c;\u5728\u539f\u59cb\u5f71\u50cf\u4e0a\u9ad8\u4eae\u663e\u793a\u51fa\u68c0\u6d4b\u5230\u7684\u7ed3\u8282\u533a\u57df&#xff0c;\u5e76\u7ed9\u51fa\u7f6e\u4fe1\u5ea6\u5206\u6570&#xff0c;\u4f9b\u533b\u751f\u53c2\u8003\u3002<\/li>\n<h3>10.4 \u9879\u76ee\u90e8\u7f72\u4e0e\u4f18\u5316<\/h3>\n<p>\u5c06\u6a21\u578b\u4ece\u5b9e\u9a8c\u5ba4\u73af\u5883\u63a8\u5411\u751f\u4ea7\u73af\u5883&#xff0c;\u9700\u8981\u5173\u6ce8\u6027\u80fd\u548c\u6548\u7387\u3002<\/p>\n<ul>\n<li>\u6a21\u578b\u8f6c\u6362&#xff1a;\u5c06PyTorch\u6216TensorFlow\u6a21\u578b\u8f6c\u6362\u4e3a\u66f4\u9002\u5408\u90e8\u7f72\u7684\u683c\u5f0f\u3002\n<ul>\n<li>ONNX (Open Neural Network Exchange)&#xff1a;\u4e00\u4e2a\u5f00\u653e\u7684\u6a21\u578b\u8868\u793a\u683c\u5f0f&#xff0c;\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u6846\u67b6\u95f4\u7684\u6a21\u578b\u8f6c\u6362\u3002<\/li>\n<li>TensorRT (NVIDIA)&#xff1a;\u4e00\u4e2a\u7528\u4e8eNVIDIA GPU\u7684\u9ad8\u6027\u80fd\u6df1\u5ea6\u5b66\u4e60\u63a8\u7406\u4f18\u5316\u5668\u548c\u8fd0\u884c\u65f6&#xff0c;\u53ef\u4ee5\u5bf9\u6a21\u578b\u8fdb\u884c\u91cf\u5316\u3001\u5c42\u878d\u5408\u7b49\u4f18\u5316&#xff0c;\u663e\u8457\u63d0\u5347\u63a8\u7406\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u670d\u52a1\u5316&#xff1a;\u4f7f\u7528Flask\u3001FastAPI&#xff08;Python&#xff09;\u6216Triton Inference Server&#xff08;NVIDIA&#xff09;\u7b49\u5de5\u5177\u5c06\u6a21\u578b\u5c01\u88c5\u6210API\u670d\u52a1&#xff0c;\u4f7f\u5176\u53ef\u4ee5\u88ab\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528\u3002<\/li>\n<li>\u5bb9\u5668\u5316&#xff1a;\u4f7f\u7528Docker\u5c06\u5e94\u7528\u7a0b\u5e8f\u53ca\u5176\u6240\u6709\u4f9d\u8d56\u9879\u6253\u5305\u5230\u4e00\u4e2a\u5bb9\u5668\u4e2d&#xff0c;\u786e\u4fdd\u5728\u4e0d\u540c\u73af\u5883\u4e2d\u7684\u4e00\u81f4\u6027&#xff0c;\u5e76\u7b80\u5316\u90e8\u7f72\u6d41\u7a0b\u3002\u4f7f\u7528Kubernetes\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7ba1\u7406\u548c\u7f16\u6392\u5bb9\u5668\u5316\u7684\u670d\u52a1\u3002<\/li>\n<\/ul>\n<h3>10.5 \u5b9e\u6218\u6848\u4f8b\u4e09&#xff1a;\u4ece\u96f6\u6784\u5efa\u56fe\u50cf\u5206\u7c7b\u5668<\/h3>\n<p>\u76ee\u6807&#xff1a;\u901a\u8fc7\u4e00\u4e2a\u5b8c\u6574\u7684\u9879\u76ee&#xff0c;\u6765\u5b9e\u8df5\u524d\u9762\u6240\u5b66\u7684\u8ba1\u7b97\u673a\u89c6\u89c9\u77e5\u8bc6\u3002\u6211\u4eec\u7684\u76ee\u6807\u662f\u6784\u5efa\u4e00\u4e2a\u80fd\u591f\u5bf9CIFAR-10\u6570\u636e\u96c6\u4e2d\u7684\u56fe\u50cf\u8fdb\u884c\u5206\u7c7b\u7684\u5206\u7c7b\u5668\u3002<\/p>\n<p>CIFAR-10\u6570\u636e\u96c6: \u5305\u542b10\u4e2a\u7c7b\u522b\u768460000\u5f2032&#215;32\u5f69\u8272\u56fe\u50cf&#xff0c;\u6bcf\u4e2a\u7c7b\u522b\u67096000\u5f20\u56fe\u50cf\u3002<\/p>\n<p>\u9879\u76ee\u6d41\u7a0b<\/p>\n<li>\u6570\u636e\u52a0\u8f7d\u4e0e\u9884\u5904\u7406&#xff1a;\u4f7f\u7528torchvision\u52a0\u8f7d\u5e76\u6807\u51c6\u5316CIFAR-10\u6570\u636e\u96c6\u3002<\/li>\n<li>\u5b9a\u4e49\u5377\u79ef\u795e\u7ecf\u7f51\u7edc (CNN)&#xff1a;\u8bbe\u8ba1\u4e00\u4e2a\u7b80\u5355\u7684CNN\u67b6\u6784\u3002<\/li>\n<li>\u5b9a\u4e49\u635f\u5931\u51fd\u6570\u548c\u4f18\u5316\u5668&#xff1a;\u4f7f\u7528\u4ea4\u53c9\u71b5\u635f\u5931\u548c\u968f\u673a\u68af\u5ea6\u4e0b\u964d (SGD)\u3002<\/li>\n<li>\u8bad\u7ec3\u6a21\u578b&#xff1a;\u5728\u8bad\u7ec3\u6570\u636e\u96c6\u4e0a\u8fed\u4ee3\u8bad\u7ec3\u7f51\u7edc\u3002<\/li>\n<li>\u6d4b\u8bd5\u6a21\u578b&#xff1a;\u5728\u6d4b\u8bd5\u6570\u636e\u96c6\u4e0a\u8bc4\u4f30\u6a21\u578b\u7684\u6027\u80fd\u3002<\/li>\n<p>\u4ee3\u7801\u5b9e\u6218<\/p>\n<p><span class=\"token keyword\">import<\/span> torch<br \/>\n<span class=\"token keyword\">import<\/span> torchvision<br \/>\n<span class=\"token keyword\">import<\/span> torchvision<span class=\"token punctuation\">.<\/span>transforms <span class=\"token keyword\">as<\/span> transforms<br \/>\n<span class=\"token keyword\">import<\/span> torch<span class=\"token punctuation\">.<\/span>nn <span class=\"token keyword\">as<\/span> nn<br \/>\n<span class=\"token keyword\">import<\/span> torch<span class=\"token punctuation\">.<\/span>nn<span class=\"token punctuation\">.<\/span>functional <span class=\"token keyword\">as<\/span> F<br \/>\n<span class=\"token keyword\">import<\/span> torch<span class=\"token punctuation\">.<\/span>optim <span class=\"token keyword\">as<\/span> optim<br \/>\n<span class=\"token keyword\">import<\/span> matplotlib<span class=\"token punctuation\">.<\/span>pyplot <span class=\"token keyword\">as<\/span> plt<br \/>\n<span class=\"token keyword\">import<\/span> numpy <span class=\"token keyword\">as<\/span> np<\/p>\n<p><span class=\"token comment\"># &#8212; 1. \u6570\u636e\u52a0\u8f7d\u4e0e\u9884\u5904\u7406 &#8212;<\/span><\/p>\n<p><span class=\"token comment\"># \u5bf9\u56fe\u50cf\u8fdb\u884c\u53d8\u6362&#xff1a;\u6807\u51c6\u5316\u5230[-1, 1]\u8303\u56f4<\/span><br \/>\ntransform <span class=\"token operator\">&#061;<\/span> transforms<span class=\"token punctuation\">.<\/span>Compose<span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token punctuation\">[<\/span>transforms<span class=\"token punctuation\">.<\/span>ToTensor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n     transforms<span class=\"token punctuation\">.<\/span>Normalize<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">0.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0.5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u4e0b\u8f7d\u5e76\u52a0\u8f7d\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6<\/span><br \/>\ntrainset <span class=\"token operator\">&#061;<\/span> torchvision<span class=\"token punctuation\">.<\/span>datasets<span class=\"token punctuation\">.<\/span>CIFAR10<span class=\"token punctuation\">(<\/span>root<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;.\/data&#039;<\/span><span class=\"token punctuation\">,<\/span> train<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                        download<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span> transform<span class=\"token operator\">&#061;<\/span>transform<span class=\"token punctuation\">)<\/span><br \/>\ntrainloader <span class=\"token operator\">&#061;<\/span> torch<span class=\"token punctuation\">.<\/span>utils<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>DataLoader<span class=\"token punctuation\">(<\/span>trainset<span class=\"token punctuation\">,<\/span> batch_size<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                          shuffle<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span> num_workers<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>testset <span class=\"token operator\">&#061;<\/span> torchvision<span class=\"token punctuation\">.<\/span>datasets<span class=\"token punctuation\">.<\/span>CIFAR10<span class=\"token punctuation\">(<\/span>root<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;.\/data&#039;<\/span><span class=\"token punctuation\">,<\/span> train<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                       download<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span> transform<span class=\"token operator\">&#061;<\/span>transform<span class=\"token punctuation\">)<\/span><br \/>\ntestloader <span class=\"token operator\">&#061;<\/span> torch<span class=\"token punctuation\">.<\/span>utils<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>DataLoader<span class=\"token punctuation\">(<\/span>testset<span class=\"token punctuation\">,<\/span> batch_size<span class=\"token operator\">&#061;<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                                         shuffle<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span><span class=\"token punctuation\">,<\/span> num_workers<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u7c7b\u522b\u6807\u7b7e<\/span><br \/>\nclasses <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;plane&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;car&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;bird&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;cat&#039;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n           <span class=\"token string\">&#039;deer&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;dog&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;frog&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;horse&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;ship&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;truck&#039;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># &#8212; 2. \u5b9a\u4e49\u5377\u79ef\u795e\u7ecf\u7f51\u7edc (CNN) &#8212;<\/span><br \/>\n<span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Net<\/span><span class=\"token punctuation\">(<\/span>nn<span class=\"token punctuation\">.<\/span>Module<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token builtin\">super<\/span><span class=\"token punctuation\">(<\/span>Net<span class=\"token punctuation\">,<\/span> self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>__init__<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>conv1 <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>Conv2d<span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>pool <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>MaxPool2d<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>conv2 <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>Conv2d<span class=\"token punctuation\">(<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>fc1 <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>Linear<span class=\"token punctuation\">(<\/span><span class=\"token number\">16<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">5<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">120<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>fc2 <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>Linear<span class=\"token punctuation\">(<\/span><span class=\"token number\">120<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">84<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>fc3 <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>Linear<span class=\"token punctuation\">(<\/span><span class=\"token number\">84<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">forward<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>pool<span class=\"token punctuation\">(<\/span>F<span class=\"token punctuation\">.<\/span>relu<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>conv1<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>pool<span class=\"token punctuation\">(<\/span>F<span class=\"token punctuation\">.<\/span>relu<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>conv2<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> x<span class=\"token punctuation\">.<\/span>view<span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">5<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> F<span class=\"token punctuation\">.<\/span>relu<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>fc1<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> F<span class=\"token punctuation\">.<\/span>relu<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>fc2<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        x <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>fc3<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> x<\/p>\n<p>net <span class=\"token operator\">&#061;<\/span> Net<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># &#8212; 3. \u5b9a\u4e49\u635f\u5931\u51fd\u6570\u548c\u4f18\u5316\u5668 &#8212;<\/span><br \/>\ncriterion <span class=\"token operator\">&#061;<\/span> nn<span class=\"token punctuation\">.<\/span>CrossEntropyLoss<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\noptimizer <span class=\"token operator\">&#061;<\/span> optim<span class=\"token punctuation\">.<\/span>SGD<span class=\"token punctuation\">(<\/span>net<span class=\"token punctuation\">.<\/span>parameters<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> lr<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0.001<\/span><span class=\"token punctuation\">,<\/span> momentum<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0.9<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># &#8212; 4. \u8bad\u7ec3\u6a21\u578b &#8212;<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u5f00\u59cb\u8bad\u7ec3&#8230;&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">for<\/span> epoch <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>  <span class=\"token comment\"># \u5728\u6570\u636e\u96c6\u4e0a\u5faa\u73af\u591a\u6b21&#xff0c;\u8fd9\u91cc\u53ea\u6f14\u793a2\u6b21<\/span><\/p>\n<p>    running_loss <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.0<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i<span class=\"token punctuation\">,<\/span> data <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">enumerate<\/span><span class=\"token punctuation\">(<\/span>trainloader<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u83b7\u53d6\u8f93\u5165<\/span><br \/>\n        inputs<span class=\"token punctuation\">,<\/span> labels <span class=\"token operator\">&#061;<\/span> data<\/p>\n<p>        <span class=\"token comment\"># \u68af\u5ea6\u6e05\u96f6<\/span><br \/>\n        optimizer<span class=\"token punctuation\">.<\/span>zero_grad<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u524d\u5411\u4f20\u64ad -&gt; \u53cd\u5411\u4f20\u64ad -&gt; \u4f18\u5316<\/span><br \/>\n        outputs <span class=\"token operator\">&#061;<\/span> net<span class=\"token punctuation\">(<\/span>inputs<span class=\"token punctuation\">)<\/span><br \/>\n        loss <span class=\"token operator\">&#061;<\/span> criterion<span class=\"token punctuation\">(<\/span>outputs<span class=\"token punctuation\">,<\/span> labels<span class=\"token punctuation\">)<\/span><br \/>\n        loss<span class=\"token punctuation\">.<\/span>backward<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        optimizer<span class=\"token punctuation\">.<\/span>step<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u6253\u5370\u7edf\u8ba1\u4fe1\u606f<\/span><br \/>\n        running_loss <span class=\"token operator\">&#043;&#061;<\/span> loss<span class=\"token punctuation\">.<\/span>item<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">2000<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">1999<\/span><span class=\"token punctuation\">:<\/span>    <span class=\"token comment\"># \u6bcf2000\u4e2amini-batches\u6253\u5370\u4e00\u6b21<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;[%d, %5d] loss: %.3f&#039;<\/span> <span class=\"token operator\">%<\/span><br \/>\n                  <span class=\"token punctuation\">(<\/span>epoch <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> i <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> running_loss <span class=\"token operator\">\/<\/span> <span class=\"token number\">2000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            running_loss <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.0<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\u8bad\u7ec3\u5b8c\u6210&#039;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># &#8212; 5. \u6d4b\u8bd5\u6a21\u578b &#8212;<\/span><br \/>\ncorrect <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><br \/>\ntotal <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><br \/>\n<span class=\"token keyword\">with<\/span> torch<span class=\"token punctuation\">.<\/span>no_grad<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> data <span class=\"token keyword\">in<\/span> testloader<span class=\"token punctuation\">:<\/span><br \/>\n        images<span class=\"token punctuation\">,<\/span> labels <span class=\"token operator\">&#061;<\/span> data<br \/>\n        outputs <span class=\"token operator\">&#061;<\/span> net<span class=\"token punctuation\">(<\/span>images<span class=\"token punctuation\">)<\/span><br \/>\n        _<span class=\"token punctuation\">,<\/span> predicted <span class=\"token operator\">&#061;<\/span> torch<span class=\"token punctuation\">.<\/span><span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>outputs<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        total <span class=\"token operator\">&#043;&#061;<\/span> labels<span class=\"token punctuation\">.<\/span>size<span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        correct <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token punctuation\">(<\/span>predicted <span class=\"token operator\">&#061;&#061;<\/span> labels<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token builtin\">sum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>item<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;Accuracy of the network on the 10000 test images: %d %%&#039;<\/span> <span class=\"token operator\">%<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n    <span class=\"token number\">100<\/span> <span class=\"token operator\">*<\/span> correct <span class=\"token operator\">\/<\/span> total<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>10.6 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