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[人脸识别]05_逻辑回归损失函数
05_逻辑回归损失函数
[人工智能]人脸识别-Python5/32
![[人脸识别]04_逻辑回归介绍](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/e2d6906475a047ee90086ae0d692a735~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=0AlPdWAKmy9jiLElEkTSoT59nOY%3D)
App13:22![[人脸识别]05_逻辑回归损失函数](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/7fafe457402d4d70956e67186f64fd38~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=tb14bWozosfqi0E9FUCKq8SFQaI%3D)
App07:42![[人脸识别]06_梯度下降算法过程以及公式](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/997f8c9aae5c421394f1393a7ee9ed44~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=UL4QWObklaVtTQ33dW9obGyTfog%3D)
App10:27![[人脸识别]07_导数意义介绍](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/3a21de1409e344cea9d98b9e504a7239~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=zNBUK0NwvBX4J%2BpLZuBLcDPfypw%3D)
App04:12![[人脸识别]08_a^2函数的导数介绍](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/19c25a10c8c6400197206f0430a97ce4~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=BSqx3DIff%2BkyXu5WuAaj6xM%2FpW8%3D)
App10:15![[人脸识别]09_导数计算图与链式法则](http://p26-sign.bdxiguaimg.com/tos-cn-p-0000/0587a1c8af4547a9b8039be192e8efb6~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=KHdcY3ztkH%2FkAgkoVIq6rPF4%2FnY%3D)
App14:15![[人脸识别]10_逻辑回归的导数计算图分析以及参数导数](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/2aace7e576fb4f35b2ba219e90a94c4a~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=7w6xaT7lvOTnDynWi9rqoRK4%2F1M%3D)
App10:59![[人脸识别]11_向量化编程介绍引入](http://p3-sign.bdxiguaimg.com/tos-cn-p-0000/861118497e804ee6b041511b3645c977~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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=hcqEdcOjbnPPYbXWwdMOmJ3JS0A%3D)
App09:49![[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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=c2gTEwdo0%2BQ%2B0uDsmZzXqZZaaKs%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://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=gFm%2FkQ1yziHRh4i5fVTr1StvPow%3D)
App09:39![[人脸识别]14_正向传播与反向传播、作业介绍](http://p26-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=7fkNua3RVV4wNZkoWpc7ZnYQ1pg%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=FA1Wo7h9kCdoghznNBf05U2ej1s%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=ZX9WJ7YcVc6ck2A3MeJO5Z8JO0c%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://p26-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=Wf6EZLToKd%2Fr00INCUTMLUB0x%2BA%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://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=9%2BeP8loNrRVU0pP%2BgafPUru9W40%3D)
App08:42![[人脸识别]19_总结](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=URtqsSVSlAnhCYLDRho5sPHzPDQ%3D)
App05:21![[人脸识别]20.浅层神经网络](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=ZKu0UBq06PdQvzifllo5SH%2FTM38%3D)
App00:17![[人脸识别]21_浅层神经网络表示](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=2rz6WrcrHQt46iWE8lj8Ikspo0c%3D)
App08:19![[人脸识别]22_浅层神经网络的前向传播](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=1ubsy%2FnQGnV3RGWibtMGGPuCaos%3D)
App06:54![[人脸识别]23_激活函数的选择](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=92fCKNNvqot%2BPql0mp3UcQEsLPE%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=sLi6NDTIVDX1NapOdHYZqIxr9Jc%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=yZ3PWx4%2FkhjDaODr1eUmrDluOpM%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=Wft2Ohst2ILEut4IHLaYIyQYFhw%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=fTaD0%2Ff1YM9pD3mrteA%2F8Heq5Ec%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=8lcinIBLNe65LyI9N6raCSb63dw%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=ijUwNmAWIScKmPYbnt8B4yO82BA%3D)
App02:34![[人脸识别]30_深层神经网络表示](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=f57%2FYlkZpOxaO98yypyoE88WXlI%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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=3TDaPSeXKSx335iYLu0ckczDm%2FY%3D)
App05:26![[人脸识别]32_参数初始化与超参数介绍](http://p3-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=20240724094054050079609087BEDABF41&requestFrom=704&version_code=80402&x-expires=1753321254&x-signature=s2IqeOHFw0M5%2BMq2d1wwA0a%2Fiwg%3D)
App06:19
