{"id":44897,"date":"2023-12-11T15:04:17","date_gmt":"2023-12-11T07:04:17","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=44897"},"modified":"2023-12-11T15:04:17","modified_gmt":"2023-12-11T07:04:17","slug":"lr%e7%9a%84%e6%8e%a8%e5%af%bc%ef%bc%8c%e6%8d%9f%e5%a4%b1%e5%87%bd%e6%95%b0-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/lr%e7%9a%84%e6%8e%a8%e5%af%bc%ef%bc%8c%e6%8d%9f%e5%a4%b1%e5%87%bd%e6%95%b0-2\/","title":{"rendered":"LR\u7684\u63a8\u5bfc\uff0c\u635f\u5931\u51fd\u6570"},"content":{"rendered":"

“`” \u53c2\u8003\u56de\u7b54\uff1a<\/p>\n

\u903b\u8f91\u56de\u5f52\u672c\u8d28\u4e0a\u662f\u7ebf\u6027\u56de\u5f52\uff0c\u53ea\u662f\u5728\u7279\u5f81\u5230\u7ed3\u679c\u7684\u6620\u5c04\u4e2d\u52a0\u5165\u4e86\u4e00\u5c42\u903b\u8f91\u51fd\u6570g(z)\uff0c\u5373\u5148\u628a\u7279\u5f81\u7ebf\u6027\u6c42\u548c\uff0c\u7136\u540e\u4f7f\u7528\u51fd\u6570g(z)\u4f5c\u4e3a\u5047\u8bbe\u51fd\u6570\u6765\u9884\u6d4b\u3002g(z)\u53ef\u4ee5\u5c06\u8fde\u7eed\u503c\u6620\u5c04\u52300 \u548c1\u3002g(z)\u4e3asigmoid function.<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624496085_D1F8D559AD0B1647C9E649FA50B39FD5""><\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624515555_CD7A7F1EB697B6A426309625DA70B3D5""><\/p>\n

sigmoid function \u7684\u5bfc\u6570\u5982\u4e0b\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624538937_0A25A5C85582136D5594B5DB8D2843C3""><\/p>\n

\u903b\u8f91\u56de\u5f52\u7528\u6765\u5206\u7c7b0\/1 \u95ee\u9898\uff0c\u4e5f\u5c31\u662f\u9884\u6d4b\u7ed3\u679c\u5c5e\u4e8e0 \u6216\u80051 \u7684\u4e8c\u503c\u5206\u7c7b\u95ee\u9898\u3002\u8fd9\u91cc\u5047\u8bbe\u4e86\u4e8c\u503c\u6ee1\u8db3\u4f2f\u52aa\u5229\u5206\u5e03\uff0c\u4e5f\u5c31\u662f<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624569787_E0D1F95F611F2EC3F60A50C4C15142B0""><\/p>\n

\u5176\u4e5f\u53ef\u4ee5\u5199\u6210\u5982\u4e0b\u7684\u5f62\u5f0f\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624594643_E93A29EB20ACC002B029EC6C72EAEB63""><\/p>\n

\u5bf9\u4e8e\u8bad\u7ec3\u6570\u636e\u96c6\uff0c\u7279\u5f81\u6570\u636ex={x1, x2, \u2026 , xm}\u548c\u5bf9\u5e94\u7684\u5206\u7c7b\u6807\u7b7ey={y1, y2, \u2026 , ym}\uff0c\u5047\u8bbem\u4e2a\u6837\u672c\u662f\u76f8\u4e92\u72ec\u7acb\u7684\uff0c\u90a3\u4e48\uff0c\u6781\u5927\u4f3c\u7136\u51fd\u6570\u4e3a\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624621836_DA393122CE8478496EF5861E50F78608""><\/p>\n

log\u4f3c\u7136\u4e3a\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624648674_DDCED485DA7922600950A0307AA81C6A""><\/p>\n

\u5982\u4f55\u4f7f\u5176\u6700\u5927\u5462\uff1f\u4e0e\u7ebf\u6027\u56de\u5f52\u7c7b\u4f3c\uff0c\u6211\u4eec\u4f7f\u7528\u68af\u5ea6\u4e0a\u5347\u7684\u65b9\u6cd5\uff08\u6c42\u6700\u5c0f\u4f7f\u7528\u68af\u5ea6\u4e0b\u964d\uff09\uff0c\u90a3\u4e48<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624677927_95A786E76A89AFC93B6F5A0A9C1949B2""><\/p>\n

\u3002<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624696084_F78C10EA74B7B867CFA197218DF16721""><\/p>\n

\u5982\u679c\u53ea\u7528\u4e00\u4e2a\u8bad\u7ec3\u6837\u4f8b\uff08x\uff0cy\uff09\uff0c\u91c7\u7528\u968f\u673a\u68af\u5ea6\u4e0a\u5347\u89c4\u5219\uff0c\u90a3\u4e48\u968f\u673a\u68af\u5ea6\u4e0a\u5347\u66f4\u65b0\u89c4\u5219\u4e3a\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624763963_28162A4F6097A0DAF664BAD4CFD880DB""><\/p>\n

\u635f\u5931\u51fd\u6570\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552624785400_A2C32CA41E62BA2128FE312663C9B685""><\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” \u53c2\u8003\u56de\u7b54\uff1a \u903b\u8f91\u56de\u5f52\u672c\u8d28\u4e0a\u662f\u7ebf\u6027\u56de\u5f52\uff0c\u53ea\u662f\u5728\u7279\u5f81\u5230\u7ed3\u679c\u7684\u6620\u5c04\u4e2d\u52a0\u5165\u4e86\u4e00\u5c42\u903b\u8f91\u51fd […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-44897","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=44897"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44897\/revisions"}],"predecessor-version":[{"id":44898,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44897\/revisions\/44898"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=44897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=44897"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=44897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}