{"id":67112,"date":"2026-01-28T09:56:49","date_gmt":"2026-01-28T01:56:49","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/67112.html"},"modified":"2026-01-28T09:56:49","modified_gmt":"2026-01-28T01:56:49","slug":"%e4%bc%98%e5%8c%96%e5%99%a8%e4%b8%ad%e7%9a%84%e5%ad%a6%e4%b9%a0%e7%8e%87%ef%bc%88learning-rate-lr%ef%bc%89%ef%bc%9a%e5%85%a8%e9%9d%a2%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/67112.html","title":{"rendered":"\u4f18\u5316\u5668\u4e2d\u7684\u5b66\u4e60\u7387\uff08Learning Rate, lr\uff09\uff1a\u5168\u9762\u8be6\u89e3"},"content":{"rendered":"<h3>\u4e00\u3001\u4ec0\u4e48\u662f\u5b66\u4e60\u7387\uff1f<\/h3>\n<h4>1.1 \u57fa\u672c\u5b9a\u4e49<\/h4>\n<p>\u5b66\u4e60\u7387\uff08lr\uff09 \u662f\u6df1\u5ea6\u5b66\u4e60\u4f18\u5316\u8fc7\u7a0b\u4e2d\u63a7\u5236\u53c2\u6570\u66f4\u65b0\u6b65\u957f\u5927\u5c0f\u7684\u8d85\u53c2\u6570\u3002\u5b83\u51b3\u5b9a\u4e86\u6a21\u578b\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u6cbf\u7740\u635f\u5931\u51fd\u6570\u68af\u5ea6\u53cd\u65b9\u5411\u79fb\u52a8\u7684\u201c\u8ddd\u79bb\u201d\u3002<\/p>\n<p>\u4ee5\u6700\u7b80\u5355\u7684\u968f\u673a\u68af\u5ea6\u4e0b\u964d\uff08SGD\uff09\u4e3a\u4f8b\uff0c\u53c2\u6570\u66f4\u65b0\u516c\u5f0f\u4e3a\uff1a<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\">\u03b8t+1=\u03b8t\u2212lr\u22c5\u2207\u03b8L(\u03b8t) \\\\theta_{t+1} = \\\\theta_t &#8211; \\\\text{lr} \\\\cdot \\\\nabla_\\\\theta \\\\mathcal{L}(\\\\theta_t) <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.9028em;vertical-align: -0.2083em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.0278em\">\u03b8<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3011em\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u4ec0\u4e48\u662f\u5b66\u4e60\u7387\uff1f<br \/>\n1.1 \u57fa\u672c\u5b9a\u4e49<br \/>\n\u5b66\u4e60\u7387\uff08lr\uff09 \u662f\u6df1\u5ea6\u5b66\u4e60\u4f18\u5316\u8fc7\u7a0b\u4e2d\u63a7\u5236\u53c2\u6570\u66f4\u65b0\u6b65\u957f\u5927\u5c0f\u7684\u8d85\u53c2\u6570\u3002\u5b83\u51b3\u5b9a\u4e86\u6a21\u578b\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\u6cbf\u7740\u635f\u5931\u51fd\u6570\u68af\u5ea6\u53cd\u65b9\u5411\u79fb\u52a8\u7684\u201c\u8ddd\u79bb\u201d\u3002<br \/>\n\u4ee5\u6700\u7b80\u5355\u7684\u968f\u673a\u68af\u5ea6\u4e0b\u964d\uff08SGD\uff09\u4e3a\u4f8b\uff0c\u53c2\u6570\u66f4\u65b0\u516c\u5f0f\u4e3a\uff1a<br \/>\n\u03b8t+1=\u03b8t\u2212lr\u22c5\u2207\u03b8L(\u03b8t) \\\\theta_{t+1} = \\\\theta_t &#8211; \\\\text{lr} \\\\cdot \\\\nabla_\\\\theta \\\\mathcal{L}(\\\\theta_t) \u03b8<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[371],"topic":[],"class_list":["post-67112","post","type-post","status-publish","format-standard","hentry","category-server","tag-371"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - 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