“`” \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_1552628490936_9D5E76E02B87531758512D79F642D093"">\u5219<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552628603079_E4A3B22C3777267277A22FCB86F16A09""><img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552628624395_1E29A25BBD05C193537EF96F4F367DDB""><\/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_1552628645965_97E3996D719420BD8FD046698495AC8D""><\/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_1552628669311_78F800D5EE77C087FAD8A7ED4D493AD2""><\/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_1552628691243_0E7F39CE64ED9B7B74CB3FD687B5CE2F""><\/p>\n
log\u4f3c\u7136\u4e3a\uff1a<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552628712611_A404F50FEC299DA5F90B0E1D3F6E97BC""><\/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_1552628740669_2879AB5674152443C45A35FA698390A7"">\u3002<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190315\/311436_1552628754920_9124D1BE8521BDD45298192B8F57C46C""><\/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_1552628780880_BCAC67BA50235D5ECBC62002777A1675""><\/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-44961","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44961","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=44961"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44961\/revisions"}],"predecessor-version":[{"id":44962,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44961\/revisions\/44962"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=44961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=44961"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=44961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}