{"id":45148,"date":"2023-12-11T15:04:59","date_gmt":"2023-12-11T07:04:59","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=45148"},"modified":"2023-12-11T15:04:59","modified_gmt":"2023-12-11T07:04:59","slug":"l1%e3%80%81l2%e6%ad%a3%e5%88%99%e5%8c%96","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/l1%e3%80%81l2%e6%ad%a3%e5%88%99%e5%8c%96\/","title":{"rendered":"L1\u3001L2\u6b63\u5219\u5316"},"content":{"rendered":"<p>&#8220;`&#8221;                    <a class=\"\"url\"\" href=\"\"https:\/\/blog.csdn.net\/jinping_shi\/article\/details\/52433975\"\" target=\"\"_blank\"\">https:\/\/blog.csdn.net\/jinping_shi\/article\/details\/52433975<\/a><\/p>\n<p>L1\u6b63\u5219\u5316\u548cL2\u6b63\u5219\u5316\u53ef\u4ee5\u770b\u505a\u662f\u635f\u5931\u51fd\u6570\u7684\u60e9\u7f5a\u9879\u3002\u6240\u8c13\u300e\u60e9\u7f5a\u300f\u662f\u6307\u5bf9\u635f\u5931\u51fd\u6570\u4e2d\u7684\u67d0\u4e9b\u53c2\u6570\u505a\u4e00\u4e9b\u9650\u5236\u3002\u5bf9\u4e8e\u7ebf\u6027\u56de\u5f52\u6a21\u578b\uff0c\u4f7f\u7528L1\u6b63\u5219\u5316\u7684\u6a21\u578b\u5efa\u53eb\u505aLasso\u56de\u5f52\uff0c\u4f7f\u7528L2\u6b63\u5219\u5316\u7684\u6a21\u578b\u53eb\u505aRidge\u56de\u5f52\uff08\u5cad\u56de\u5f52\uff09\u3002<\/p>\n<p>L1\u6b63\u5219\u5316\u662f\u6307\u6743\u503c\u5411\u91cfw\u4e2d\u5404\u4e2a\u5143\u7d20\u7684\u7edd\u5bf9\u503c\u4e4b\u548c\uff0c\u901a\u5e38\u8868\u793a\u4e3a||w||_1<\/p>\n<p>L2\u6b63\u5219\u5316\u662f\u6307\u6743\u503c\u5411\u91cfw\u4e2d\u5404\u4e2a\u5143\u7d20\u7684\u5e73\u65b9\u548c\u7136\u540e\u518d\u6c42\u5e73\u65b9\u6839\uff08\u53ef\u4ee5\u770b\u5230Ridge\u56de\u5f52\u7684L2\u6b63\u5219\u5316\u9879\u6709\u5e73\u65b9\u7b26\u53f7\uff09\uff0c\u901a\u5e38\u8868\u793a\u4e3a||w||_2<\/p>\n<p>L1\u6b63\u5219\u5316\u53ef\u4ee5\u4ea7\u751f\u7a00\u758f\u6743\u503c\u77e9\u9635\uff0c\u5373\u4ea7\u751f\u4e00\u4e2a\u7a00\u758f\u6a21\u578b\uff0c\u53ef\u4ee5\u7528\u4e8e\u7279\u5f81\u9009\u62e9<\/p>\n<p>L2\u6b63\u5219\u5316\u53ef\u4ee5\u9632\u6b62\u6a21\u578b\u8fc7\u62df\u5408\uff08overfitting\uff09\uff1b\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\uff0cL1\u4e5f\u53ef\u4ee5\u9632\u6b62\u8fc7\u62df\u5408<\/p>\n<p>&lt;pre&gt;&lt;code&gt;            &quot;&#8220;`<br \/>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; https:\/\/blog.csdn.net\/jinping_shi\/artic [&hellip;]<\/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-45148","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45148","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=45148"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45148\/revisions"}],"predecessor-version":[{"id":45149,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/45148\/revisions\/45149"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=45148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=45148"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=45148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}