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xn]-&gt;Y\uff08\u5bf9\u4e8e\u5355\u4e2a\u795e\u7ecf\u5143\u6765\u8bb2\uff0c\u8f93\u51fa\u90fd\u662f\u4e00\u4e2a\u6570\u503c\uff09\u3002\u591a\u4e2a\u795e\u7ecf\u5143\u76f8\u4e92\u8fde\u63a5\u8d77\u6765\uff0c\u5c31\u5f62\u6210\u4e86\u795e\u7ecf\u7f51\u7edc\uff0c\u795e\u7ecf\u5143\u7684\u8f93\u5165\u53ef\u4ee5\u662f\u6765\u81ea\u5176\u4ed6\u591a\u4e2a\u795e\u7ecf\u5143\u7684\u8f93\u51fa\uff0c\u8be5\u795e\u7ecf\u5143\u7684\u8f93\u51fa\u53c8\u53ef\u4ee5\u4f5c\u4e3a\u5176\u4ed6\u795e\u7ecf\u5143\u7684\u8f93\u5165\uff08\u7684\u4e00\u90e8\u5206\uff09\u3002\u4e0b\u56fe\u4e3a\u4e00\u4e2a\u795e\u7ecf\u5143\u7684\u7ed3\u6784\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150512816-220424090.png\" width=\"391\" height=\"324\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u4e00\u4e2a\u795e\u7ecf\u5143\u63a5\u6536[x1, x2, &#8230;, xn]\u4f5c\u4e3a\u8f93\u5165\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u8f93\u5165Xi\uff0c\u90fd\u4f1a\u4e58\u4ee5\u4e00\u4e2a\u6743\u91cdWi\uff0c\u5c06\u4e58\u79ef\u7ed3\u679c\u76f8\u52a0\u518d\u7ecf\u8fc7\u51fd\u6570f\u4f5c\u7528\u540e\uff0c\u4ea7\u751f\u8f93\u51faY\u3002\u591a\u4e2a\u795e\u7ecf\u5143\u76f8\u4e92\u8fde\u63a5\u4e4b\u540e\uff0c\u5f97\u5230\u795e\u7ecf\u7f51\u7edc\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150543218-1858558800.png\" width=\"453\" height=\"333\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\uff0c\u591a\u4e2a\u795e\u7ecf\u5143\u76f8\u4e92\u8fde\u63a5\u8d77\u6765\u7ec4\u6210\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\uff08\u56fe\u4e2d\u53ea\u5305\u542bw\u53c2\u6570\uff0c\u7701\u7565\u4e86b\uff09\uff0c\u56fe\u4e2d\u795e\u7ecf\u7f51\u7edc\u4e00\u5171\u5305\u542b3\u5c42\uff08Layer1\uff0cLayer2\u548cLayer3\uff09\uff0c\u4e0a\u4e00\u5c42\u6bcf\u4e2a\u795e\u7ecf\u5143\u7684\u8f93\u51fa\u5168\u90e8\u4f5c\u4e3a\u540e\u4e00\u5c42\u6bcf\u4e2a\u795e\u7ecf\u5143\u7684\u8f93\u5165\uff0c\u8fd9\u79cd\u7f51\u7edc\u53eb\u201c\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u201d\uff08\u987e\u540d\u601d\u4e49\uff0c\u5168\u8fde\u63a5\u7684\u610f\u601d\uff09\u3002\u56fe\u4e2d\u9ec4\u8272\u90e8\u5206\u5c31\u662f\u4e24\u4e2a\u5b8c\u6574\u7684\u795e\u7ecf\u5143\u7ed3\u6784\uff0c\u7b2c\u4e00\u4e2a\u795e\u7ecf\u5143\u6709\u4e09\u4e2a\u8f93\u5165\uff08x1\uff0cx2\u548cx3\uff09\uff0c\u5206\u522b\u4e58\u4ee5\u5bf9\u5e94\u7684\u6743\u91cdw31\uff0cw32\u548cw33\uff0c\u7b2c\u4e8c\u4e2a\u795e\u7ecf\u5143\u6709\u56db\u4e2a\u8f93\u5165\uff08\u5206\u522b\u6765\u81ea\u4e8eLayer1\u5c42\u4e2d\u76844\u4e2a\u8f93\u51fa\uff09\u3002\u8be5\u795e\u7ecf\u7f51\u7edc\u53ef\u4ee5\u63a5\u53d7\u4e00\u4e2a3\u7ef4\u5411\u91cf\u4f5c\u4e3a\u8f93\u5165\uff08\u683c\u5f0f\u4e3a[x1, x2, x3]\uff09\uff0c\u4ece\u5de6\u5f80\u53f3\u8ba1\u7b97\uff0c\u6700\u540e\u8f93\u51fa\u4e00\u4e2a2\u7ef4\u5411\u91cf\uff08\u683c\u5f0f\u4e3a[y1, y2]\uff09\u3002\u5bf9\u5e94\u5b83\u5b66\u4e60\u5230\u7684\u7ecf\u9a8c\uff0c\u53ef\u4ee5\u7528\u6765\u5904\u7406\u7b26\u5408\u5982\u4e0b\u6620\u5c04\u5173\u7cfb\u7684\u201c\u5206\u7c7b\u201d\u6216\u8005\u201c\u56de\u5f52\u201d\u95ee\u9898\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150613210-1448106771.png\" width=\"320\" height=\"94\" 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loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150703426-1024675176.png\" width=\"471\" height=\"176\" \/><\/p>\n<p><strong>\uff082\uff09\u77e9\u9635\u76f8\u4e58<\/strong><\/p>\n<p>\u77e9\u9635\u76f8\u4e58\u8981\u6c42\u7b2c\u4e00\u4e2a\u77e9\u9635\u5305\u542b\u7684\u5217\u6570\u548c\u7b2c\u4e8c\u4e2a\u77e9\u9635\u5305\u542b\u7684\u884c\u6570\u76f8\u540c\uff0cM*N\u7684\u77e9\u9635\u4e58\u4ee5N*T\u7684\u77e9\u9635\uff0c\u5f97\u5230M*T\u7684\u4e00\u4e2a\u65b0\u77e9\u9635\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150732398-2027306113.png\" width=\"554\" height=\"184\" 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X2, X3&#8230;\uff09\uff0c\u90a3\u4e48\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u4e2d\u6bcf\u4e00\u5c42\uff08\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u795e\u7ecf\u5143\uff09\u7684\u8ba1\u7b97\u8fc7\u7a0b\u53ef\u4ee5\u7528\u77e9\u9635\u8868\u793a\u6210\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150756751-234726334.png\" width=\"554\" height=\"352\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\uff0c\u4f7f\u7528\u77e9\u9635\u6211\u4eec\u53ef\u4ee5\u6279\u91cf\u64cd\u4f5c\u3002\u5bf9\u4e8e\u56fe4\u4e2d\u7b2c\u4e00\u5c42\uff08Layer1\uff09\u6240\u6709\u795e\u7ecf\u5143\u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u56fe8\u4e00\u6b21\u6027\u8ba1\u7b97\u5b8c\u6210\u3002\u56fe\u4e2dW\u77e9\u9635\u5148\u548cX\u77e9\u9635\u76f8\u4e58\uff0c\u518d\u52a0\u4e0a\u504f\u79fb\u503cB\u77e9\u9635\uff0c\u5f97\u5230\u4e00\u4e2a\u4e2d\u95f4\u7ed3\u679c\uff08\u4e5f\u662f\u4e00\u4e2a\u77e9\u9635\uff09\uff0c\u7136\u540e\u518d\u5c06\u4e2d\u95f4\u7ed3\u679c\u4f20\u7ed9\u51fd\u6570f\uff0c\u8f93\u51fa\u53e6\u5916\u4e00\u4e2a\u65b0\u77e9\u9635Y\uff0c\u90a3\u4e48\u8fd9\u4e2aY\u5c31\u662f\u795e\u7ecf\u7f51\u7edc\u7b2c\u4e00\u5c42Layer1\u7684\u8f93\u51fa\uff0c\u5b83\u4f1a\u4f5c\u4e3a\u4e0b\u4e00\u5c42Layer2\u7684\u8f93\u5165\uff0c\u540e\u9762\u4ee5\u6b64\u7c7b\u63a8\u3002\u6ce8\u610f\uff0c\u51fd\u6570f\u63a5\u53d7\u4e00\u4e2a\u77e9\u9635\u4e3a\u53c2\u6570\uff0c\u5e76\u4f5c\u7528\u4e8e\u77e9\u9635\u4e2d\u6bcf\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u7ef4\u5ea6\u4e00\u6837\u7684\u65b0\u77e9\u9635\uff0c\u540e\u9762\u4f1a\u63d0\u5230\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u4e4b\u524d\u9700\u8981\u8ba1\u7b974\u6b21f(w*x+b)\uff0c\u73b0\u5728\u53ea\u9700\u8981\u4e00\u6b21\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u901a\u8fc7\u524d\u9762\u7684\u4ecb\u7ecd\uff0c\u53ef\u4ee5\u5f97\u77e5\uff0c\u795e\u7ecf\u7f51\u7edc\u7684\u8bad\u7ec3\u8fc7\u7a0b\u5c31\u662f\u627e\u5230\u6700\u5408\u9002\u7684W\u77e9\u9635\uff08\u591a\u4e2a\uff09\u548c\u6700\u5408\u9002\u7684b\u77e9\u9635\uff08\u591a\u4e2a\uff09\u4f7f\u5f97\u795e\u7ecf\u7f51\u7edc\u7684\u8f93\u51fa\u4e0e\u771f\u5b9e\u503c\uff08\u6807\u7b7e\uff09\u6700\u63a5\u8fd1\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e5f\u53eb\u505a\u6a21\u578b\u8bad\u7ec3\u6216\u8005\u8c03\u53c2\uff08\u5f53\u7136\u6a21\u578b\u8bad\u7ec3\u8fdc\u4e0d\u6b62\u8fd9\u6837\uff0c\u8fd8\u6709\u5176\u4ed6\u8bf8\u5982\u8d85\u53c2\u6570\u7684\u786e\u5b9a\uff09\u3002<\/p>\n<h2><strong>\u975e\u7ebf\u6027\u53d8\u6362<\/strong><\/h2>\n<p>\u5373\u4f7f\u8f93\u5165\u662f\u9ad8\u7ef4\u5411\u91cf\uff0c\u7ecf\u8fc7\u7b80\u5355\u7684W*X+b\u8fd9\u6837\u5904\u7406\u4e4b\u540e\uff0c\u8f93\u51fa\u548c\u8f93\u5165\u4ecd\u7136\u5448\u7ebf\u6027\u5173\u7cfb\u3002\u4f46\u662f\u73b0\u5b9e\u573a\u666f\u4e2d\u5927\u90e8\u5206\u5f85\u89e3\u51b3\u7684\u95ee\u9898\u90fd\u4e0d\u662f\u7ebf\u6027\u6a21\u578b\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5728\u8f93\u5165\u548c\u8f93\u51fa\u4e4b\u95f4\u589e\u52a0\u4e00\u4e2a\u975e\u7ebf\u6027\u53d8\u6362\uff0c\u4e5f\u5c31\u662f\u524d\u9762\u591a\u6b21\u63d0\u5230\u7684f\u51fd\u6570\uff08\u53c8\u79f0\u4e3a\u6fc0\u6d3b\u51fd\u6570\uff09\u3002<strong>\u7531\u4e8e\u5404\u79cd\u539f\u56e0\uff08\u8fd9\u91cc\u6d89\u53ca\u5230\u795e\u7ecf\u7f51\u7edc\u5177\u4f53\u7684\u8bad\u7ec3\u8fc7\u7a0b\uff0c\u53cd\u5411\u4f20\u64ad\u8ba1\u7b97\u6743\u91cd\u503c\uff0c\u6682\u4e0d\u8fc7\u591a\u89e3\u91ca\uff09<\/strong>\uff0c\u5e38\u89c1\u53ef\u7528\u7684\u6fc0\u6d3b\u51fd\u6570\u5e76\u4e0d\u591a\uff0c\u8fd9\u91cc\u4e3e\u4e24\u4e2a\u51fd\u6570\u4e3a\u4f8b\uff1a<\/p>\n<p><strong>\uff081\uff09Sigmoid\u51fd\u6570<\/strong><\/p>\n<p>Sigmoid\u51fd\u6570\u80fd\u5c06\u4efb\u610f\u5b9e\u6570\u6620\u5c04\u5230(0, 1)\u4e4b\u95f4\uff0c\u5177\u4f53\u51fd\u6570\u56fe\u50cf\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150836014-1363818336.png\" width=\"400\" height=\"400\" \/><\/p>\n<p>\u4e0a\u56fe\u4e2dSigmoid\u51fd\u6570\u5c06\u4efb\u610f\u8f93\u5165\u6620\u5c04\u5230(0, 1)\u4e4b\u95f4\u7684\u503c\uff0c\u56e0\u6b64Sigmoid\u51fd\u6570\u53c8\u7ecf\u5e38\u88ab\u79f0\u4e3a\u903b\u8f91\u51fd\u6570\uff0c\u5e38\u7528\u4e8e\u4e8c\u5206\u7c7b\u9884\u6d4b\u95ee\u9898\uff0c\u5047\u8bbe\u6709\u4e24\u4e2a\u5206\u7c7bA\u548cB\uff0c\u5bf9\u4e8e\u4efb\u4f55\u8f93\u5165\u7279\u5f81X\uff0cSigmoid\u8fd4\u56de\u503c\u8d8a\u8d8b\u8fd1\u4e8e1\uff0c\u90a3\u4e48\u9884\u6d4b\u5206\u7c7b\u4e3aA\uff0c\u53cd\u4e4b\u5219\u4e3aB\u3002<\/p>\n<p><strong>\uff082\uff09ReLu\u51fd\u6570<\/strong><\/p>\n<p>ReLu\u51fd\u6570\u5f88\u7b80\u5355\uff0c\u8fd4\u56de\u503c\u4e3amax(x, 0)\uff0c\u5177\u4f53\u51fd\u6570\u56fe\u50cf\u4e3a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104150904798-1288725006.png\" width=\"391\" height=\"249\" 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loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151040945-850152127.png\" width=\"917\" height=\"584\" \/><\/p>\n<p>\u4e0a\u56fe\u663e\u793a\u4e00\u4e2a\u548c\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u540c\u6837\u7ed3\u6784\u7684\u7ba1\u9053\u7f51\u72b6\u7ed3\u6784\uff0c\u4ece\u4e0a\u5230\u4e0b\u6709\u591a\u4e2a\u9600\u95e8\u53ef\u4ee5\u8c03\u8282\u63a7\u5236\u6db2\u4f53\u8d70\u5411\uff08\u56fe\u4e2d\u2460\uff09\uff0c\u7ecf\u8fc7\u4e8b\u5148\u591a\u6b21\u6837\u672c\u6db2\u4f53\u8bad\u7ec3\uff08\u4f7f\u7528\u4e0d\u540c\u54c1\u724c\u3001\u4e0d\u540c\u9152\u7cbe\u5ea6\u3001\u4e0d\u540c\u5b50\u578b\u53f7\u7684\u767d\u9152\uff09\uff0c\u6211\u4eec\u5c06\u9600\u95e8\u8c03\u8282\u5230\u6700\u4f73\u72b6\u6001\u3002\u968f\u540e\u5c06\u4e00\u676f\u767d\u9152\u4ece\u6700\u9876\u90e8\u5012\u5165\u7f51\u72b6\u7ed3\u6784\uff0c\u6700\u540e\u7ecf\u8fc7\u7ba1\u9053\u6240\u6709\u6db2\u4f53\u4f1a\u5206\u522b\u6d41\u8fdb\u4e09\u4e2a\u73bb\u7483\u676f\u4e2d\uff08\u56fe\u4e2d\u2462\uff09\u3002\u5982\u679c\u6211\u4eec\u5c06\u4e00\u676f\u4e94\u7cae\u6db2\u5012\u5165\u7ba1\u9053\uff0c\u7406\u8bba\u60c5\u51b5\u6240\u6709\u7684\u6db2\u4f53\u5e94\u8be5\u5b8c\u5168\u6d41\u8fdb\u7b2c\u4e00\u4e2a\u73bb\u7483\u676f\u4e2d\uff08\u56fe\u4e2d\u5de6\u4fa7\uff09\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u7531\u4e8e\u795e\u7ecf\u7f51\u7edc\u5177\u5907\u6cdb\u5316\u80fd\u529b\uff0c\u5bf9\u4e8e\u4efb\u4f55\u8f93\u5165\uff08\u5305\u62ec\u8bad\u7ec3\u6837\u672c\uff09\uff0c\u5927\u90e8\u5206\u65f6\u5019\u4e0d\u4f1a\u8ddf\u6b63\u786e\u7ed3\u679c100%\u4e00\u81f4\uff0c\u6700\u7ec8\u53ea\u4f1a\u4fdd\u8bc1\u7b2c\u4e00\u4e2a\u73bb\u7483\u676f\u4e2d\u7684\u6db2\u4f53\u6700\u591a\uff08\u6bd4\u5982\u536085%\uff09\uff0c\u5176\u4f59\u4e24\u4e2a\u73bb\u7483\u676f\u540c\u6837\u5b58\u5728\u5c11\u91cf\u6db2\u4f53\uff08\u56fe\u4e2d\u53f3\u4fa7\uff09\u3002<\/p>\n<p>\u90a3\u4e48\u73b0\u5728\u6709\u4e2a\u95ee\u9898\uff0c\u795e\u7ecf\u7f51\u7edc\u6700\u540e\u8f93\u51fa\u7684\u662f\u6570\u503c\uff08\u6216\u591a\u7ef4\u5411\u91cf\uff0c\u5411\u91cf\u5305\u542b\u5177\u4f53\u6570\u503c\uff09\uff0c\u7ed3\u679c\u662f\u5982\u4f55\u4f53\u73b0\u201c\u5206\u7c7b\u201d\u7684\u6982\u5ff5\u5462\uff1f\u672c\u6587\u6700\u5f00\u59cb\u8bb2\u5230\u8fc7\uff0c\u5206\u7c7b\u95ee\u9898\u6700\u540e\u90fd\u662f\u901a\u8fc7\u6982\u7387\u6765\u4f53\u73b0\uff0c\u67d0\u4e2a\u5206\u7c7b\u7684\u6982\u7387\u6700\u9ad8\uff0c\u90a3\u4e48\u5c31\u5c5e\u4e8e\u8be5\u5206\u7c7b\uff0c\u4e0b\u56fe\u663e\u793a\u5982\u4f55\u5c06\u6570\u503c\u8f6c\u6362\u6210\u6982\u7387\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151124337-535649708.png\" width=\"526\" height=\"340\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u5bf9\u4e8e2\u5206\u7c7b\u95ee\u9898\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528\u524d\u9762\u63d0\u5230\u7684Sigmoid\u51fd\u6570\u5c06\u5176\u8f6c\u6362\u6210(0,1)\u4e4b\u95f4\u7684\u6982\u7387\u503c\uff0c\u7136\u540e\u518d\u6839\u636e\u6982\u7387\u503c\u5212\u5206\u7c7b\u522b\u3002\u5bf9\u4e8eN\u5206\u7c7b\uff08N\u4e5f\u53ef\u4ee5\u4e3a2\uff09\uff0c\u6211\u4eec\u8981\u4f7f\u7528\u53e6\u5916\u4e00\u4e2a\u51fd\u6570Softmax\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u5411\u91cf\u4f5c\u4e3a\u53c2\u6570\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u5411\u91cf\uff0c\u7ef4\u5ea6\u8ddf\u8f93\u5165\u4e00\u81f4\uff0c\u65b0\u5411\u91cf\u7684\u6bcf\u4e2a\u503c\u5747\u5206\u5e03\u5728\u5728(0, 1)\u4e4b\u524d\uff0c\u5e76\u4e14\u6240\u6709\u6982\u7387\u4e4b\u548c\u4e3a1\u3002\u6ce8\u610f\u8be5\u51fd\u6570\u4f5c\u7528\u5728\u6574\u4e2a\u5411\u91cf\u4e0a\uff0c\u5411\u91cf\u4e2d\u7684\u6bcf\u4e2a\u503c\u4e4b\u95f4\u76f8\u4e92\u6709\u5f71\u54cd\uff0c\u611f\u5174\u8da3\u7684\u540c\u5b66\u4e0a\u7f51\u67e5\u4e00\u4e0b\u516c\u5f0f\u3002<\/p>\n<h2><strong>\u56fe\u50cf\u5206\u7c7b\u4efb\u52a1<\/strong><\/h2>\n<p>\u56fe\u50cf\u5206\u7c7b\u53c8\u79f0\u4e3a\u56fe\u50cf\u8bc6\u522b\uff0c\u7ed9\u5b9a\u4e00\u5f20\u56fe\uff0c\u8981\u6c42\u8f93\u51fa\u56fe\u4e2d\u5305\u542b\u7684\u76ee\u6807\u7c7b\u578b\uff0c\u6bd4\u5982\u6211\u4eec\u5e38\u89c1\u7684\u201c\u5fae\u8f6f\u8bc6\u82b1\u201d\u3001\u201c\u8bc6\u522b\u732b\u8fd8\u662f\u72d7\u201d\u7b49\u7b49\uff0c\u8fd9\u662f\u8ba1\u7b97\u673a\u89c6\u89c9\u4e2d\u6700\u5178\u578b\u7684\u201c\u5206\u7c7b\u201d\u95ee\u9898\u3002\u56fe\u50cf\u5206\u7c7b\u662f\u5176\u4ed6\u8bf8\u5982\u201c\u76ee\u6807\u68c0\u6d4b\u201d\u3001\u201c\u76ee\u6807\u5206\u5272\u201d\u7684\u57fa\u7840\u3002<\/p>\n<p><strong>\uff081\uff09\u56fe\u50cf\u7684\u5b9a\u4e49<\/strong><\/p>\n<p>\u6570\u5b57\u56fe\u50cf\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u591a\u7ef4\u77e9\u9635\uff0c\u5e38\u89c1\u7684RGB\u56fe\u50cf\u53ef\u4ee5\u770b\u4f5c\u662f3\u4e2a\u4e8c\u7ef4\u77e9\u9635\uff0c\u77e9\u9635\u4e2d\u6bcf\u4e2a\u503c\u8868\u793a\u5bf9\u5e94\u989c\u8272\u901a\u9053\u4e0a\u7684\u503c\uff080~255\uff09\uff0c\u8fd8\u6709\u5176\u4ed6\u6bd4\u5982\u7070\u5ea6\u56fe\uff0c\u53ef\u4ee5\u770b\u4f5c\u662f\u662f1\u4e2a\u4e8c\u7ef4\u77e9\u9635\uff0c\u77e9\u9635\u4e2d\u6bcf\u4e2a\u503c\u8868\u793a\u989c\u8272\u7684\u50cf\u7d20\u503c\uff080~255\uff09\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151210873-828151681.png\" width=\"554\" height=\"233\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u4e00\u5f20RGB\u5168\u5f69\u6570\u5b57\u56fe\u7247\u5927\u5c0f\u4e3a180*200\uff0c\u5bf9\u5e943\u4e2a\u77e9\u9635\uff0c\u5927\u5c0f\u90fd\u662f180*200\uff0c\u77e9\u9635\u4e2d\u7684\u6570\u503c\u8303\u56f4\u90fd\u57280~255\u3002\u5bf9\u4e8e\u5355\u901a\u9053\u7070\u5ea6\u56fe\u800c\u8a00\uff0c\u5bf9\u5e941\u4e2a\u77e9\u9635\uff0c\u5927\u5c0f\u4e5f\u662f180*200\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151230961-595978671.png\" width=\"554\" height=\"214\" \/><\/p>\n<p><strong>\uff082\uff09\u4f7f\u7528\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u505a\u56fe\u50cf\u5206\u7c7b<\/strong><\/p>\n<p>\u524d\u9762\u5df2\u7ecf\u8bb2\u5230\u5982\u4f55\u4f7f\u7528\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u89e3\u51b3\u201c\u5206\u7c7b\u201d\u7684\u95ee\u9898\uff0c\u56fe\u50cf\u5206\u7c7b\u540c\u6837\u5c5e\u4e8e\u5206\u7c7b\u95ee\u9898\uff0c\u56e0\u6b64\u4e5f\u53ef\u4ee5\u4f7f\u7528\u795e\u7ecf\u7f51\u7edc\u7684\u65b9\u5f0f\u89e3\u51b3\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u524d\u9762\u63d0\u5230\u7684\u90fd\u662f\u6570\u503c\u7279\u5f81\u8f93\u5165[x1, x2, x3, 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loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151311585-1106788097.png\" width=\"483\" height=\"381\" \/><\/p>\n<p>\u4e0a\u56fe\u663e\u793a4\u5f20\u624b\u5199\u6570\u5b57\u56fe\u7247\uff0c\u5206\u522b\u4e3a\u201c5\u201d\u3001\u201c0\u201d\u3001\u201c4\u201d\u3001\u201c1\u201d\uff0c\u6bcf\u5f20\u56fe\u7247\u5927\u5c0f\u4e3a28*28\uff0c\u5373\u957f\u5bbd\u90fd\u4e3a28\u50cf\u7d20\uff0c\u56fe\u7247\u90fd\u662f\u7070\u5ea6\u56fe\u50cf\uff0c\u4e5f\u5c31\u662f\u8bf4\u6bcf\u5f20\u56fe\u7247\u5bf9\u5e941\u4e2a28*28\u7ef4\u77e9\u9635\uff0c\u5c06\u8be5\u77e9\u9635\u5c55\u5f00\u5f97\u5230\u4e00\u4e2a28*28\u7ef4\u5411\u91cf\uff0c\u76f4\u63a5\u8f93\u5165\u5230\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u4e2d\u3002\u4ece0\u52309\u4e00\u517110\u4e2a\u5206\u7c7b\uff0c\u56e0\u6b64\u795e\u7ecf\u7f51\u7edc\u7684\u8f93\u51fa\u662f\u4e00\u4e2a10\u7ef4\u5411\u91cf\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151335406-1907444773.png\" width=\"554\" height=\"264\" 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href=\"https:\/\/www.cnblogs.com\/xiaozhi_5638\/p\/11512260.html\">https:\/\/www.cnblogs.com\/xiaozhi_5638\/p\/11512260.html<\/a><\/p>\n<p>\u5728\u4f7f\u7528\u795e\u7ecf\u7f51\u7edc\u5bf9\u56fe\u7247\u8fdb\u884c\u5206\u7c7b\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u63d0\u53d6\u56fe\u50cf\u7279\u5f81\uff0c\u7136\u540e\u518d\u5c06\u63d0\u53d6\u5230\u7684\u7279\u5f81\u8f93\u5165\u5230\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u4e2d\u8fdb\u884c\u5206\u7c7b\uff0c\u56e0\u6b64\u89e3\u51b3\u56fe\u50cf\u5206\u7c7b\u95ee\u9898\u7684\u6b63\u786e\u795e\u7ecf\u7f51\u7edc\u7ed3\u6784\u5e94\u8be5\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151416063-813287344.png\" width=\"554\" height=\"179\" 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decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104152444809-1895088259.gif\" width=\"480\" height=\"272\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u4e00\u5f20\u539f\u59cb\u56fe\u7247\u7ecf\u8fc7\u4e00\u6b21\u5377\u79ef\u5904\u7406\u4e4b\u540e\uff0c\u751f\u6210\u7684feature map\u4ee5\u56fe\u7247\u7684\u65b9\u5f0f\u663e\u793a\u51fa\u6765\u4e4b\u540e\u4f3c\u4e4e\u8fd8\u662f\u53ef\u4ee5\u4eba\u773c\u8bc6\u522b\u51fa\u6765\u3002\u4f46\u662f\uff0c\u5982\u679c\u7ecf\u8fc7\u591a\u6b21\u5377\u79ef\u5904\u7406\u4e4b\u540e\uff0c\u90a3\u4e48\u6700\u7ec8\u7684feature map\u5c31\u65e0\u6cd5\u4eba\u773c\u8bc6\u522b\u4e86\u3002\u4e0a\u56fe\u8fd8\u53ef\u4ee5\u770b\u51fa\uff0c\u4e0d\u540c\u7684\u5377\u79ef\u6838\u5904\u7406\u540c\u4e00\u5f20\u8f93\u5165\u56fe\u7247\u540e\uff0c\u751f\u6210\u7684feature map\u4e4b\u95f4\u6709\u5dee\u522b\u3002<\/p>\n<p>\u8fd9\u91cc\u518d\u6b21\u5f3a\u8c03\uff0c\u867d\u7136\u7ecf\u8fc7\u5377\u79ef\u64cd\u4f5c\u5f97\u5230\u7684feature maps\u4ecd\u7136\u53ef\u4ee5\u4ee5\u56fe\u7247\u7684\u5f62\u5f0f\u663e\u793a\u51fa\u6765\uff0c\u4f46\u662f\u5b83\u4e0d\u5728\u662f\u6211\u4eec\u901a\u5e38\u7406\u89e3\u4e2d\u7684\u201c\u56fe\u7247\u201d\u4e86\u3002\u867d\u7136\u4eba\u773c\u770b\u4e0d\u518d\u6709\u4efb\u4f55\u610f\u4e49\uff0c\u4f46\u662f\u5bf9\u4e8e\u8ba1\u7b97\u673a\u6765\u8bb2\uff0c\u610f\u4e49\u975e\u5e38\u91cd\u5927\u3002\u5377\u79ef\u5c42\u53ef\u4ee5\u5b58\u5728\u591a\u4e2a\uff0c\u4e00\u4e2a\u5377\u79ef\u5c42\u540e\u9762\u53ef\u4ee5\u7d27\u8ddf\u53e6\u5916\u4e00\u4e2a\u5377\u79ef\u5c42\uff0c\u524d\u4e00\u5c42\u7684\u8f93\u51fa\u662f\u4e0b\u4e00\u5c42\u7684\u8f93\u5165\u3002\u5377\u79ef\u5c42\u4e2d\u7684\u4e00\u4e9b\u53c2\u6570\uff0c\u6bd4\u5982\u5377\u79ef\u6838\u77e9\u9635\u4e2d\u7684\u5177\u4f53\u6570\u503c\uff0c\u90fd\u9700\u8981\u901a\u8fc7\u8bad\u7ec3\u5f97\u5230\uff0c\u8fd9\u4e2a\u9053\u7406\u8ddf\u524d\u9762\u63d0\u5230\u7684W\u548cb\u53c2\u6570\u4e00\u6837\uff0c\u4e5f\u662f\u9700\u8981\u901a\u8fc7\u8bad\u7ec3\u53bb\u62df\u5408\u3002<\/p>\n<p><strong>\uff082\uff09\u975e\u7ebf\u6027\u53d8\u6362\uff08\u6fc0\u6d3b\u51fd\u6570\uff09<\/strong><\/p>\n<p>\u548c\u524d\u9762\u8bb2\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u4e00\u6837\uff0c\u7ecf\u8fc7\u5377\u79ef\u5c42\u5904\u7406\u4e4b\u540e\u751f\u6210\u7684feature maps\u4ecd\u7136\u9700\u8981\u8fdb\u884c\u975e\u7ebf\u6027\u8f6c\u6362\uff0c\u8fd9\u91cc\u7684\u65b9\u5f0f\u8ddf\u524d\u9762\u4e00\u6837\uff0c\u4f7f\u7528\u5e38\u89c1\u7684\u6fc0\u6d3b\u51fd\u6570\uff0c\u6bd4\u5982ReLu\u51fd\u6570\u4f5c\u7528\u5728feature map\u4e0a\u7684\u6548\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151519881-1660579627.png\" width=\"513\" height=\"192\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\uff0cfeature map\u7ecf\u8fc7\u6fc0\u6d3b\u51fd\u6570\u5904\u7406\u4e4b\u540e\uff0c\u5f97\u5230\u53e6\u5916\u4e00\u4e2a\u77e9\u9635\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a Rectified feature map\u3002\u6839\u636e\u524d\u9762\u4ecb\u7ecdReLu\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u77e5\uff0c\u8be5\u6fc0\u6d3b\u51fd\u6570\uff08max(0, x)\uff09\u5c06\u539ffeature map\u77e9\u9635\u4e2d\u7684\u6240\u6709\u8d1f\u6570\u5168\u90e8\u53d8\u6210\u4e860\u3002<\/p>\n<p><strong>\uff083\uff09\u6c60\u5316\u5c42<\/strong><\/p>\n<p>\u53ea\u6709\u5377\u79ef\u64cd\u4f5c\u548c\u6fc0\u6d3b\u5904\u7406\u8fd8\u662f\u4e0d\u591f\uff0c\u56e0\u4e3a\u5230\u76ee\u524d\u4e3a\u6b62\uff0c(Rectified) feature maps\u5305\u542b\u7684\u7279\u5f81\u6570\u636e\u8fd8\u662f\u592a\u5927\uff0c\u4e3a\u4e86\u8ba9\u6a21\u578b\u5177\u5907\u4e00\u5b9a\u7684\u6cdb\u5316\u80fd\u529b\uff0c\u6211\u4eec\u9700\u8981\u5bf9feature maps\u8fdb\u884c\u964d\u7ef4\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e4b\u4e3a\u6c60\u5316\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151544075-926406481.png\" width=\"395\" height=\"336\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\uff0c\u6c60\u5316\u5c42\u5728\u539f\u59cbfeature maps\u4e0a\u8fdb\u884c\u64cd\u4f5c\uff0c\u8fd8\u662f\u6309\u7167\u201c\u4ece\u5de6\u5f80\u53f3\u4ece\u4e0a\u5230\u4e0b\u201d\u7684\u987a\u5e8f\uff0c\u9009\u62e9\u4e00\u4e2a\u5b50\u77e9\u9635\uff08\u56fe\u4e2d\u5706\u5708\u90e8\u52062*2\uff0c\u7c7b\u4f3c\u524d\u9762\u7684\u5377\u79ef\u6838\uff09\uff0c\u9009\u53d6\u8be5\u5b50\u77e9\u9635\u8303\u56f4\u5185\u6700\u5927\u7684\u503c\u4f5c\u4e3a\u65b0\u77e9\u9635\u4e2d\u7684\u503c\uff0c\u4f9d\u6b21\u5904\u7406\u540e\u6700\u540e\u7ec4\u6210\u4e00\u4e2a\u5168\u65b0\u77e9\u9635\uff0c\u8fd9\u4e2a\u5168\u65b0\u77e9\u9635\u5c3a\u5bf8\u6bd4\u539f\u6765\u7684\u5c0f\u3002\u9664\u4e86\u53d6\u6700\u5927\u503c\u5916\uff0c\u8fd8\u6709\u53d6\u5e73\u5747\u503c\u548c\u6c42\u548c\u7684\u505a\u6cd5\uff0c\u4f46\u662f\u7ecf\u8fc7\u524d\u4eba\u5b9e\u8df5\u8bc1\u660e\uff0c\u53d6\u6700\u5927\u503c\uff08\u6700\u5927\u6c60\u5316\uff09\u6548\u679c\u6700\u597d\u3002<\/p>\n<p>\u7ecf\u8fc7\u6c60\u5316\u5c42\u5904\u7406\u4e4b\u540e\u7684feature maps\u4ecd\u7136\u53ef\u4ee5\u4ee5\u56fe\u7247\u7684\u65b9\u5f0f\u663e\u793a\u51fa\u6765\uff0c\u8fd8\u662f\u548c\u524d\u9762\u4e00\u6837\uff0c\u4eba\u773c\u5df2\u7ecf\u5206\u4e0d\u6e05\u662f\u5565\u4e86\uff0c\u4f46\u662f\u5bf9\u4e8e\u8ba1\u7b97\u673a\u6765\u8bb2\u610f\u4e49\u91cd\u5927\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104151600000-106876273.png\" width=\"554\" height=\"229\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u4e00\u5f20feature map\u7ecf\u8fc7\u4e24\u79cd\u65b9\u5f0f\u6c60\u5316\uff0c<strong>\u53d6\u6700\u5927\u503c<\/strong>\u548c<strong>\u6c42\u548c<\/strong>\uff0c\u5206\u522b\u5f97\u5230\u4e0d\u540c\u7684\u65b0\u77e9\u9635\uff0c\u7136\u540e\u5c06\u65b0\u77e9\u9635\u4ee5\u56fe\u7247\u7684\u65b9\u5f0f\u663e\u793a\u51fa\u6765\uff0c\u53ef\u4ee5\u770b\u5230\u5dee\u522b\u8fd8\u662f\u975e\u5e38\u5927\uff08\u867d\u7136\u4eba\u773c\u5df2\u7ecf\u5206\u4e0d\u6e05\u5185\u5bb9\uff09\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5377\u79ef\u5c42\u540e\u9762\u4e0d\u9700\u8981\u90fd\u7d27\u8ddf\u4e00\u4e2a\u6c60\u5316\u5c42\uff0c\u53ef\u4ee5\u7ecf\u8fc7\u591a\u4e2a\u5377\u79ef\u5c42\u4e4b\u540e\u518d\u52a0\u4e00\u4e2a\u6c60\u5316\u5c42\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5377\u79ef\u548c\u6c60\u5316\u53ef\u4ee5\u4e0d\u6309\u71671:1\u7684\u6bd4\u4f8b\u8fdb\u884c\u7ec4\u5408\u3002\u5377\u79ef\u795e\u7ecf\u7f51\u7edc\u4e2d\u7279\u5f81\u63d0\u53d6\u90e8\u5206\u5c31\u662f\u4f7f\u7528\u5377\u79ef\u5c42\u3001\u6fc0\u6d3b\u5904\u7406\u3001\u6c60\u5316\u5c42\u7b49\u7ec4\u5408\u800c\u6210\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4fee\u6539\u76f8\u5e94\u7f51\u7edc\u5c42\u7684\u6570\u91cf\uff08\u901a\u5e38\u6240\u8bf4\u7684\u201c\u8c03\u6574\u7f51\u7edc\u7ed3\u6784\u201d\uff09\u3002\u6700\u540e\u4e00\u4e2a\u6c60\u5316\u5c42\u8f93\u51fa\u7684\u7ed3\u679c\u5c31\u662f\u6211\u4eec\u63d0\u53d6\u5f97\u5230\u7684\u56fe\u50cf\u7279\u5f81\uff0c\u6bd4\u5982\u6700\u540e\u4e00\u4e2a\u6c60\u5316\u5c42\u8f93\u51faT\u4e2a\u77e9\u9635\uff08feature maps\uff09\uff0c\u6bcf\u4e2a\u5927\u5c0f\u4e3aM*N\uff0c\u90a3\u4e48\u5c06\u5176\u5c55\u5f00\u540e\u5f97\u5230\u4e00\u4e2aT*M*N\u7ef4\u5411\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5411\u91cf\u5c31\u662f\u56fe\u50cf\u7279\u5f81\u3002\u5230\u8fd9\u91cc\u5e94\u8be5\u5c31\u5f88\u6e05\u695a\u4e86\uff0c\u6211\u4eec\u5982\u679c\u5c06\u8fd9\u4e2a\u7279\u5f81\u5411\u91cf\u4f20\u5230\u4e00\u4e2a\u201c\u5206\u7c7b\u5668\u201d\u4e2d\uff0c\u901a\u8fc7\u5206\u7c7b\u5668\u5c31\u53ef\u4ee5\u5f97\u5230\u6700\u7ec8\u7684\u5206\u7c7b\u7ed3\u679c\uff0c\u5206\u7c7b\u5668\u53ef\u4ee5\u4f7f\u7528\u524d\u9762\u8bb2\u5230\u7684\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u3002<\/p>\n<p><strong>\uff084\uff09\u5168\u8fde\u63a5\u5c42\uff08\u5206\u7c7b\u5668\uff09<\/strong><\/p>\n<p>\u5176\u5b9e\u770b\u5230\u8fd9\u91cc\u7684\u540c\u5b66\uff0c\u5982\u679c\u524d\u9762\u7684\u5185\u5bb9\u90fd\u770b\u61c2\u4e86\uff0c\u8fd9\u5757\u5c31\u4e0d\u96be\u4e86\u3002\u56fe\u50cf\u7279\u5f81\u5df2\u7ecf\u5f97\u5230\u4e86\uff0c\u76f4\u63a5\u5c06\u5b83\u8f93\u5165\u5230\u5168\u8fde\u63a5\u795e\u7ecf\u7f51\u7edc\u4e2d\u53bb\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u6700\u7ec8\u5206\u7c7b\u7ed3\u679c\u3002\u4e0b\u56fe\u663e\u793a\u5c06\u4e00\u4e2a\u624b\u5199\u6570\u5b57\u56fe\u7247\u4f20\u5165\u5377\u79ef\u795e\u7ecf\u7f51\u7edc\u4e2d\u7684\u8fc7\u7a0b\uff0c\u5148\u5206\u522b\u7ecf\u8fc7\u4e24\u4e2a\u5377\u79ef\u5c42\u548c\u4e24\u4e2a\u6c60\u5316\u5c42\uff08\u4ea4\u53c9\u76f8\u8fde\u800c\u6210\uff0c\u56fe\u4e2d\u5ffd\u7565\u4e86\u6fc0\u6d3b\u5904\u7406\u7b49\u5176\u4ed6\u64cd\u4f5c\uff09\uff0c\u7136\u540e\u5c06\u6700\u540e\u4e00\u4e2a\u6c60\u5316\u5c42\u7684\u8f93\u51fa\u5148\u5c55\u5f00\u518d\u4f5c\u4e3a\u5168\u8fde\u63a5\u7f51\u7edc\u7684\u8f93\u5165\uff0c\u7ecf\u8fc7\u4e24\u4e2a\u5168\u8fde\u63a5\u5c42\uff0c\u6700\u7ec8\u5f97\u5230\u4e00\u4e2a10*1\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191104160235286-858654644.png\" width=\"742\" height=\"420\" \/><\/p>\n<p>\u5173\u4e8e\u5377\u79ef\u795e\u7ecf\u7f51\u7edc\u7684\u914d\u56fe\u5747\u6765\u81ea\uff1a<a href=\"https:\/\/ujjwalkarn.me\/2016\/08\/11\/intuitive-explanation-convnets\/\" rel=\"noopener nofollow\">https:\/\/ujjwalkarn.me\/2016\/08\/11\/intuitive-explanation-convnets\/<\/a><\/p>\n<h2><strong>\u5173\u4e8e\u6a21\u578b\u8bad\u7ec3<\/strong><\/h2>\n<p>\u4e00\u4e9b\u6df1\u5ea6\u5b66\u4e60\u6846\u67b6\u4f1a\u5e2e\u6211\u4eec\u53bb\u505a\u6a21\u578b\u8bad\u7ec3\u7684\u5177\u4f53\u5de5\u4f5c\uff0c\u6bd4\u5982\u4e0a\u9762\u63d0\u5230\u7684w\u548cb\u7684\u786e\u5b9a\uff0c\u627e\u51fa\u6700\u5408\u9002\u7684w\u548cb\u5c3d\u91cf\u4f7f\u9884\u6d4b\u503c\u4e0e\u771f\u5b9e\u503c\u4e4b\u95f4\u7684\u8bef\u5dee\u6700\u5c0f\u3002\u4e0b\u9762\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f7f\u7528tensorflow\u6765\u4f18\u5316 loss=4*(w-1)^2\u8fd9\u4e2a\u51fd\u6570\uff0c\u627e\u5230\u6700\u5408\u9002\u7684w\u4f7floss\u6700\u5c0f\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large\" src=\"http:\/\/videopipe.cool\/wp-content\/uploads\/2024\/11\/104032-20191105165834335-1033700496.jpg\" width=\"312\" height=\"272\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u6211\u4eec\u5b66\u8fc7\u7684\u6570\u5b66\u77e5\u8bc6\u544a\u8bc9\u6211\u4eec\uff0cw\u7b49\u4e8e1\u65f6loss\u6700\u5c0f\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u901a\u8fc7\u6c42\u5bfc\u5f97\u51fa\uff08\u5bfc\u6570\u7b49\u4e8e0\u7684\u65f6\u5019\uff09\u3002\u90a3\u4e48\u4f7f\u7528tensorflow\u6765\u5e2e\u6211\u4eec\u786e\u5b9aw\u8be5\u662f\u600e\u6837\u5462\uff1f\u4e0b\u9762\u662f\u4f7f\u7528tensorflow\u6765\u4f18\u5316\u8be5\u51fd\u6570\uff0c\u786e\u5b9a\u6700\u6709w\u7684\u503c\uff1a<\/p>\n<div>\n<blockquote>\n<div>w = tf.get_variable(&#8220;w&#8221;, initializer = 3.0)<\/div>\n<div>optimizer = tf.train.GradientDescentOptimizer(learning_rate=0.1)<\/div>\n<div>for i in range(5):<\/div>\n<div>\u3000\u3000optimizer.minimize(lambda: 4*(w-1)*(w-1))<\/div>\n<div>\u3000\u3000print(w.numpy())<\/div>\n<\/blockquote>\n<div>\u4f7f\u7528\u68af\u5ea6\u4e0b\u964d\u4f18\u5316\u7b97\u6cd5\u53bb\u5bfb\u627e\u6700\u5408\u9002\u7684w\uff0c\u6700\u540e\u7684\u8f93\u51fa\u662f\uff1a<\/div>\n<div>\n<blockquote><p>1.4<br \/>\n1.0799999<br \/>\n1.016<br \/>\n1.0032<br \/>\n1.00064<\/p><\/blockquote>\n<p>\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u7ecf\u8fc75\u6b21\u5bfb\u627e\uff0c\u6211\u4eec\u5f97\u5230\u6700\u4f18\u7684w\u4e3a1.00064\uff0c\u5df2\u7ecf\u975e\u5e38\u63a5\u8fd11\u4e86\u3002<strong>\u8fd9\u4e2a\u8fc7\u7a0b\u5176\u5b9e\u5c31\u662f\u6df1\u5ea6\u5b66\u4e60\u6846\u67b6\u8bad\u7ec3\u6a21\u578b\u7684\u7b80\u5355\u7248\u672c<\/strong>\u3002<\/p>\n<\/div>\n<\/div>\n<p>\u6ce8\u610f\uff1a<\/p>\n<ol>\n<li>\u672c\u7bc7\u6587\u7ae0\u6ca1\u6709\u6d89\u53ca\u5230\u5177\u4f53\u6a21\u578b\u8bad\u7ec3\u7684\u539f\u7406\uff0c\u4e5f\u5c31\u662f\u6c42W\u548cb\u77e9\u9635\u7684\u5177\u4f53\u8fc7\u7a0b\uff0c\u56e0\u4e3a\u8be5\u8fc7\u7a0b\u6bd4\u8f83\u590d\u6742\u800c\u4e14\u6d89\u53ca\u5230\u5f88\u591a\u6570\u5b66\u516c\u5f0f\uff0c\u8bfb\u8005\u53ea\u9700\u8981\u77e5\u9053\uff1a\u6a21\u578b\u8bad\u7ec3\u7684\u672c\u8d28\u5c31\u662f\u4f7f\u7528\u5927\u91cf\u5e26\u6709\u6807\u7b7e\u7684\u6837\u672c\u6570\u636e\u627e\u5230\u76f8\u5bf9\u6bd4\u8f83\u5408\u9002\u7684W\u548cb\u77e9\u9635\uff0c\u4e4b\u540e\u8fd9\u4e9b\u77e9\u9635\u53c2\u6570\u53ef\u4ee5\u4f5c\u7528\u4e8e\u6837\u672c\u4e4b\u5916\u7684\u6570\u636e\u3002<\/li>\n<li>\u6df1\u5ea6\u5b66\u4e60\u5f88\u591a\u505a\u6cd5\u7f3a\u4e4f\u5b9e\u9645\u7406\u8bba\u4f9d\u636e\uff0c\u5927\u90e8\u5206\u8fd8\u662f\u9760\u7ecf\u9a8c\uff0c\u6bd4\u5982\u5230\u5e95\u591a\u5c11\u5c42\u5408\u9002\uff0c\u5230\u5e95\u7528\u4ec0\u4e48\u6fc0\u6d3b\u51fd\u6570\u6548\u679c\u66f4\u597d\uff0c\u5f88\u591a\u65f6\u5019\u9488\u5bf9\u4e0d\u540c\u7684\u6570\u636e\u96c6\uff08\u6216\u8005\u95ee\u9898\uff09\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u7b54\u6848\u3002<\/li>\n<li>\u9664\u4e86\u540d\u5b57\u76f8\u540c\u5916\uff0c\u6df1\u5ea6\u5b66\u4e60\u4e2d\u7684\u795e\u7ecf\u7f51\u7edc\u8ddf\u4eba\u8111\u795e\u7ecf\u7f51\u7edc\u5de5\u4f5c\u539f\u7406\u6ca1\u6709\u5173\u7cfb\uff0c\u4e4b\u524d\u4ee5\u4e3a\u6709\u5173\u7cfb\uff0c\u6240\u4ee5\u53d6\u4e86\u4e00\u4e2a\u7c7b\u4f3c\u7684\u540d\u5b57\uff0c\u540e\u6765\u79d1\u5b66\u5bb6\u53d1\u73b0\u597d\u50cf\u6ca1\u4ec0\u4e48\u5173\u7cfb\uff0c\u56e0\u4e3a\u4eba\u8111\u592a\u590d\u6742\u3002<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uff082019\u5e74\u6587\u7ae0\uff09 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