{"id":44208,"date":"2023-12-11T15:02:10","date_gmt":"2023-12-11T07:02:10","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=44208"},"modified":"2023-12-11T15:02:10","modified_gmt":"2023-12-11T07:02:10","slug":"dnn%e7%9a%84%e6%a2%af%e5%ba%a6%e6%9b%b4%e6%96%b0%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/dnn%e7%9a%84%e6%a2%af%e5%ba%a6%e6%9b%b4%e6%96%b0%e6%96%b9%e5%bc%8f\/","title":{"rendered":"DNN\u7684\u68af\u5ea6\u66f4\u65b0\u65b9\u5f0f"},"content":{"rendered":"

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

1\uff09\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5BGD<\/p>\n

\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5\uff08Batch Gradient Descent\uff0c\u7b80\u79f0BGD\uff09\u662f\u68af\u5ea6\u4e0b\u964d\u6cd5\u6700\u539f\u59cb\u7684\u5f62\u5f0f\uff0c\u5b83\u7684\u5177\u4f53\u601d\u8def\u662f\u5728\u66f4\u65b0\u6bcf\u4e00\u53c2\u6570\u65f6\u90fd\u4f7f\u7528\u6240\u6709\u7684\u6837\u672c\u6765\u8fdb\u884c\u66f4\u65b0\uff0c\u5176\u6570\u5b66\u5f62\u5f0f\u5982\u4e0b\uff1a<\/p>\n

(1) \u5bf9\u4e0a\u8ff0\u7684\u80fd\u91cf\u51fd\u6570\u6c42\u504f\u5bfc\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190318\/311436_1552884062866_4E715D0E1C4617CBE8F212947964BC27""><\/p>\n

(2) \u7531\u4e8e\u662f\u6700\u5c0f\u5316\u98ce\u9669\u51fd\u6570\uff0c\u6240\u4ee5\u6309\u7167\u6bcf\u4e2a\u53c2\u6570\u7684\u68af\u5ea6\u8d1f\u65b9\u5411\u6765\u66f4\u65b0\u6bcf\u4e2a\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190318\/311436_1552884047122_960241992B0CE1D42A90F4D908F000B8""><\/p>\n

2\uff09\u968f\u673a\u68af\u5ea6\u4e0b\u964d\u6cd5SGD<\/p>\n

\u7531\u4e8e\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5\u5728\u66f4\u65b0\u6bcf\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u90fd\u9700\u8981\u6240\u6709\u7684\u8bad\u7ec3\u6837\u672c\uff0c\u6240\u4ee5\u8bad\u7ec3\u8fc7\u7a0b\u4f1a\u968f\u7740\u6837\u672c\u6570\u91cf\u7684\u52a0\u5927\u800c\u53d8\u5f97\u5f02\u5e38\u7684\u7f13\u6162\u3002\u968f\u673a\u68af\u5ea6\u4e0b\u964d\u6cd5\uff08Stochastic Gradient Descent\uff0c\u7b80\u79f0SGD\uff09\u6b63\u662f\u4e3a\u4e86\u89e3\u51b3\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5\u8fd9\u4e00\u5f0a\u7aef\u800c\u63d0\u51fa\u7684\u3002<\/p>\n

\u5c06\u4e0a\u9762\u7684\u80fd\u91cf\u51fd\u6570\u5199\u4e3a\u5982\u4e0b\u5f62\u5f0f\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190318\/311436_1552884030295_CAEC35FD55855FA9FBF041489C41AE04""><\/p>\n

\u5229\u7528\u6bcf\u4e2a\u6837\u672c\u7684\u635f\u5931\u51fd\u6570\u5bf9\u6c42\u504f\u5bfc\u5f97\u5230\u5bf9\u5e94\u7684\u68af\u5ea6\uff0c\u6765\u66f4\u65b0\uff1a<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20190318\/311436_1552884017945_47F8FE1B87BB9BAF08A32A9F44E5C67E""><\/p>\n

3\uff09\u5c0f\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5MBGD<\/p>\n

\u6709\u4e0a\u8ff0\u7684\u4e24\u79cd\u68af\u5ea6\u4e0b\u964d\u6cd5\u53ef\u4ee5\u770b\u51fa\uff0c\u5176\u5404\u81ea\u5747\u6709\u4f18\u7f3a\u70b9\uff0c\u90a3\u4e48\u80fd\u4e0d\u80fd\u5728\u4e24\u79cd\u65b9\u6cd5\u7684\u6027\u80fd\u4e4b\u95f4\u53d6\u5f97\u4e00\u4e2a\u6298\u8877\u5462\uff1f\u5373\uff0c\u7b97\u6cd5\u7684\u8bad\u7ec3\u8fc7\u7a0b\u6bd4\u8f83\u5feb\uff0c\u800c\u4e14\u4e5f\u8981\u4fdd\u8bc1\u6700\u7ec8\u53c2\u6570\u8bad\u7ec3\u7684\u51c6\u786e\u7387\uff0c\u800c\u8fd9\u6b63\u662f\u5c0f\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5\uff08Mini-batch Gradient Descent\uff0c\u7b80\u79f0MBGD\uff09\u7684\u521d\u8877\u3002<\/p>\n

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

“`” \u53c2\u8003\u56de\u7b54\uff1a 1\uff09\u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5BGD \u6279\u91cf\u68af\u5ea6\u4e0b\u964d\u6cd5\uff08Batch Gradie […]<\/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-44208","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44208","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=44208"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44208\/revisions"}],"predecessor-version":[{"id":44209,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44208\/revisions\/44209"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=44208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=44208"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=44208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}