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[人脸识别]13_向量化实现逻辑回归的梯度计算更新
13_向量化实现逻辑回归的梯度计算更新
[人工智能]人脸识别-Python13/32
![[人脸识别]12_向量化编程的优势](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/8ee87342a4e84b8e98526410e69c2457~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=Cmvv22P%2BKJGgiUPjZ9AvRKe2s0g%3D)
App10:19![[人脸识别]13_向量化实现逻辑回归的梯度计算更新](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/05463f12c7d543548b6bc9e431998f4c~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=Bs88GhErPED3HIQ%2BRsFRKipTdKA%3D)
App09:39![[人脸识别]14_正向传播与反向传播、作业介绍](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/be2ece9ab62b4427b4344c6f8891d6c5~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=l%2FoYh2QEO0V%2BjAfJ0wR9%2F0aiads%3D)
App06:11![[人脸识别]15_作业讲解题1：实现sigmoid函数与梯度实](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/7e46818c846941a3824c5739b9428c97~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=ovUsgucAyniIraSZEPs8bl9%2B0ks%3D)
App03:39![[人脸识别]16_单神经元神经网络(logistic)分类作业流程介绍](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/2b427277380543dc88bf1e9a0e2aa12b~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=fbdwAl7KYZZ5kRLs%2BQEwAAO76OQ%3D)
App03:50![[人脸识别]17_作业讲解题2：参数初始化与前向传播、反向传播](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/cf6421b148c44256b15e7c574421ec51~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=2wSkq7C0ACfk65DmleWpXKC2%2BNE%3D)
App10:08![[人脸识别]18_作业讲解题2：优化迭代实现、model逻辑实现](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/c6284559eadc492cba05df270fcf72a6~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=YNBDxXst%2FFJJ0xkQC0ANKdtqEA4%3D)
App08:42![[人脸识别]19_总结](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/d7d3198a9fe041738456871b3f77c0ae~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=PTtuoueiQHm9JEem6IFmvY8JIvA%3D)
App05:21![[人脸识别]20.浅层神经网络](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/cc3afacff2f744189d167e523e0ec2f0~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=mgxbUW6Z2AJB2%2FWVCta3NZUURvc%3D)
App00:17![[人脸识别]21_浅层神经网络表示](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/b55e17dd8d3243458c0095a8bbe0faa0~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=cuoSREXPtALyHG9FSRYl0a80rFE%3D)
App08:19![[人脸识别]22_浅层神经网络的前向传播](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/e8362bea70544ab6b1cbec525971afba~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=NCZ6%2FUj0CRdJfBMlH3Mwij4aE1g%3D)
App06:54![[人脸识别]23_激活函数的选择](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/38514f38e996472baafd0454d6f4765f~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=iskQ%2B5RaSd29zFrFPEwnXSYNiBQ%3D)
App11:16![[人脸识别]24_浅层神经网络的反向传播](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/2b1c2e3f7a234c4988b19a4165fd659b~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=Y3Z0rF6YF1qQm6AYxHiYC90d0Pg%3D)
App10:25![[人脸识别]25_作业介绍](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/bb21ab3a34a54c659c8f6e29987272aa~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=f7qSqKJOHQ%2BFLvpaOoytwAFO3yM%3D)
App02:41![[人脸识别]26_作业实现：初始化模型与前向传播](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/ee1534b4123f4f8ab13a39edd0c4e0c5~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=Hbl03bUHg9QJ5BrUtYINckY0law%3D)
App11:59![[人脸识别]27_作业实现：反向传播与更新梯度](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/921360b3adf5466bb67d7bfbded4d045~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=lXW3s4DSK46B0dUnWAOrOPFcXcQ%3D)
App14:14![[人脸识别]28_作业实现：网络模型逻辑实现](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/4e9aa37965cd4a348523b694e270d405~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=QdJE7FBMG0w22cDP69pX9Imba9c%3D)
App05:33![[人脸识别]29_总结](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/4a79f3668c1b47aa89fa58d96cd11615~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=PqX%2B%2BXTZnGFpfJF9aNY7tTFWYjc%3D)
App02:34![[人脸识别]30_深层神经网络表示](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/83716f9a626b40b18fac78a88cf2589e~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=9G%2Fd8qytcOwV9v5qmR9LIyQHw9Y%3D)
App08:16![[人脸识别]31_深层神经网络的反向传播过程](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/d4fffd0d224649828c7f31465bcc6454~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=hOsSB9F5MHF5cc%2BXWTMKvhK07MI%3D)
App05:26![[人脸识别]32_参数初始化与超参数介绍](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/1aa5ca2df4dc4bc3812450ba1c381129~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20240907140127DE428C585A19C574E62F&requestFrom=704&version_code=80402&x-expires=1757224888&x-signature=rEplZvy1wiby%2BTq3ZLCQ4JdEhrE%3D)
App06:19打开App观看
