{"id":3083,"date":"2025-08-10T10:31:38","date_gmt":"2025-08-10T02:31:38","guid":{"rendered":"https:\/\/www.leexinghai.com\/aic\/?p=3083"},"modified":"2025-08-17T10:40:49","modified_gmt":"2025-08-17T02:40:49","slug":"2-6%e6%a0%b8%e5%87%bd%e6%95%b0%e7%9a%84%e5%ae%9a%e4%b9%89","status":"publish","type":"post","link":"https:\/\/www.leexinghai.com\/aic\/2-6%e6%a0%b8%e5%87%bd%e6%95%b0%e7%9a%84%e5%ae%9a%e4%b9%89\/","title":{"rendered":"2.6\u6838\u51fd\u6570\u7684\u5b9a\u4e49"},"content":{"rendered":"\n<p>SVM\u5185\u6838\u603b\u7ed3\uff08\u89c6\u9891P66\uff09<\/p>\n\n\n\n<p>\u56db\u79cd\u7ecf\u5178\u6838\u51fd\u6570\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Linear\uff08\u7ebf\u6027\u5185\u6838\uff09<\/li>\n\n\n\n<li>Ploy\uff08\u591a\u9879\u5f0f\u6838\uff09<\/li>\n\n\n\n<li>Rbf\uff08\u9ad8\u65af\u5f84\u5411\u57fa\u51fd\u6570\u6838\uff09<\/li>\n\n\n\n<li>Tanh\u6838<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe9 1. Linear \u6838\uff08\u7ebf\u6027\u6838\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcd0 \u6570\u5b66\u5f62\u5f0f\uff1a<\/h3>\n\n\n\n<p>K(x,x\u2032)=x<sup>\u22a4<\/sup>x\u2032<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5c31\u662f\u4e24\u4e2a\u6837\u672c\u5411\u91cf\u7684\u70b9\u79ef<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d \u89e3\u91ca\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u8fdb\u884c\u4efb\u4f55\u201c\u5347\u7ef4\u53d8\u6362\u201d\uff0c\u76f4\u63a5\u5728\u7ebf\u6027\u7a7a\u95f4\u627e\u5206\u9694\u8d85\u5e73\u9762<\/li>\n\n\n\n<li>\u4e0e\u539f\u59cb\u7a7a\u95f4\u5b8c\u5168\u4e00\u81f4 \u21d2 \u4e0d\u9002\u7528\u4e8e\u975e\u7ebf\u6027\u95ee\u9898<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7279\u5f81\u6570\u8fdc\u5927\u4e8e\u6837\u672c\u6570\uff08\u5982\u6587\u672c\u5206\u7c7b\u3001\u57fa\u56e0\u6570\u636e\uff09<\/li>\n\n\n\n<li>\u6570\u636e\u672c\u8eab\u5c31\u662f\u7ebf\u6027\u53ef\u5206\u7684\u6216\u8fd1\u4f3c\u7ebf\u6027<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u4e0d\u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u5b58\u5728\u590d\u6742\u8fb9\u754c\u6216\u975e\u7ebf\u6027\u7ed3\u6784<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe6 2. Polynomial \u6838\uff08\u591a\u9879\u5f0f\u6838\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcd0 \u6570\u5b66\u5f62\u5f0f\uff1a<\/h3>\n\n\n\n<p>K(x,x\u2032)=(x<sup>\u22a4<\/sup>x\u2032+c)<sup>d<\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>d\uff1a\u591a\u9879\u5f0f\u7684\u6b21\u6570\uff08degree\uff09<em>#d\u8d8a\u5927\uff0c\u7ef4\u5ea6\u8d8a\u9ad8\u8d8a\u590d\u6742\u3002<\/em><\/li>\n\n\n\n<li>c\uff1a\u5e38\u6570\u9879\u504f\u79fb\uff08\u5e38\u4e3a 0 \u6216 1\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d \u89e3\u91ca\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9e\u73b0\u201c\u975e\u7ebf\u6027\u5347\u7ef4\u201d\uff0c\u76f8\u5f53\u4e8e\u628a\u539f\u59cb\u7a7a\u95f4\u6620\u5c04\u5230\u4e86\u9ad8\u7ef4\u591a\u9879\u5f0f\u7a7a\u95f4<\/li>\n\n\n\n<li>\u53ef\u4ee5\u6355\u6349\u4ea4\u53c9\u7279\u5f81\u3001\u9ad8\u9636\u76f8\u5173\u6027\uff08\u6bd4\u5982 x<sub>1<\/sub>x<sub>2<\/sub>,x<sub>1<\/sub><sup>2<\/sup>\u7b49\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7279\u5f81\u4e4b\u95f4\u6709\u201c\u4e58\u6cd5\u201d\u5173\u7cfb\u6216\u590d\u6742\u4ea4\u4e92\u9879<\/li>\n\n\n\n<li>\u7ed3\u6784\u6bd4\u7ebf\u6027\u7a0d\u590d\u6742\uff0c\u4f46\u4e0d\u81f3\u4e8e\u9700\u8981\u65e0\u9650\u7ef4<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u4e0d\u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u7ef4 + \u9ad8\u6b21\u6570\u65f6\u5bb9\u6613\u8fc7\u62df\u5408<\/li>\n\n\n\n<li>\u76f8\u6bd4 RBF \u901a\u7528\u6027\u7a0d\u5dee<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe8 3. RBF \u6838\uff08\u9ad8\u65af\u5f84\u5411\u57fa\u51fd\u6570\u6838\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcd0 \u6570\u5b66\u5f62\u5f0f\uff1a<\/h3>\n\n\n\n<p>K(x,x\u2032)=exp\u2061(\u2212\u03b3||x\u2212x\u2032||<sup>2<\/sup>)<\/p>\n\n\n\n<p>\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u03b3=1\/2\u03c3<sup>2<\/sup>\u200b\uff0c\u63a7\u5236\u6838\u51fd\u6570\u201c\u5bbd\u5ea6\u201d<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d \u89e3\u91ca\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u628a\u6bcf\u4e2a\u6837\u672c\u6620\u5c04\u5230\u4e00\u4e2a\u201c\u9ad8\u65af\u5c71\u201d\uff0c\u7c7b\u4f3c\u4e8e\u201c\u65e0\u9650\u7ef4\u201d\u53d8\u6362<\/li>\n\n\n\n<li>\u975e\u5e38\u5f3a\u5927\uff0c\u80fd\u5904\u7406\u51e0\u4e4e\u4efb\u610f\u590d\u6742\u7684\u975e\u7ebf\u6027\u7ed3\u6784<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u5206\u5e03\u590d\u6742\u6216\u6ca1\u6709\u660e\u663e\u7ed3\u6784<\/li>\n\n\n\n<li>\u51e0\u4e4e\u662f<strong>\u9ed8\u8ba4\u6700\u901a\u7528\u6838<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u4e0d\u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u53c2\u6570 \u03b3 \u548c C \u8f83\u654f\u611f \u21d2 \u9700\u8981\u8c03\u53c2<\/li>\n\n\n\n<li>\u5728\u7279\u5f81\u6570\u8fdc\u5927\u4e8e\u6837\u672c\u6570\u573a\u666f\u4e0b\u53ef\u80fd\u8fc7\u62df\u5408<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udfe5 4. Tanh \u6838\uff08\u53cc\u66f2\u6b63\u5207\u6838 \/ Sigmoid \u6838\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcd0 \u6570\u5b66\u5f62\u5f0f\uff1a<\/h3>\n\n\n\n<p>K(x,x\u2032)=tanh\u2061(\u03ba\u22c5x<sup>\u22a4<\/sup>x\u2032+c\uff09<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u03ba\u3001c\uff1a\u53ef\u8c03\u53c2\u6570<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd0d \u89e3\u91ca\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53d7\u5230\u795e\u7ecf\u7f51\u7edc\u4e2d<strong>\u6fc0\u6d3b\u51fd\u6570 tanh()<\/strong> \u542f\u53d1<\/li>\n\n\n\n<li>\u65e9\u671f\u7528\u6765\u6a21\u62df\u5355\u9690\u5c42\u795e\u7ecf\u7f51\u7edc\u7684\u6548\u679c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u67d0\u4e9b\u4e8c\u5206\u7c7b\u95ee\u9898<\/li>\n\n\n\n<li>\u4e0e\u795e\u7ecf\u7f51\u7edc\u5bf9\u6bd4\u5b9e\u9a8c\u65f6<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u4e0d\u9002\u5408\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6548\u679c\u5e38\u5e38\u4e0d\u5982 RBF \u6838<\/li>\n\n\n\n<li>\u4e0d\u662f\u4e00\u4e2a\u4e25\u683c\u7684\u201cMercer \u6838\u201d\uff08\u5e76\u975e\u5bf9\u6240\u6709\u53c2\u6570\u90fd\u6ee1\u8db3\u6b63\u5b9a\u6027\uff09<\/li>\n\n\n\n<li>\u8c03\u53c2\u96be\uff0c\u5bb9\u6613\u5bfc\u81f4\u975e\u6536\u655b<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd01 \u5bf9\u6bd4\u603b\u7ed3\u8868\u683c\uff1a<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6838\u51fd\u6570<\/th><th>\u6620\u5c04\u7c7b\u578b<\/th><th>\u662f\u5426\u975e\u7ebf\u6027<\/th><th>\u662f\u5426\u9700\u8981\u8c03\u53c2<\/th><th>\u662f\u5426\u9ed8\u8ba4\u63a8\u8350<\/th><th>\u7279\u70b9<\/th><\/tr><\/thead><tbody><tr><td>Linear<\/td><td>\u65e0\u5347\u7ef4<\/td><td>\u5426<\/td><td>\u5426<\/td><td>\u2705 \u5bf9\u7ebf\u6027\u95ee\u9898\u5f88\u597d<\/td><td>\u7b80\u5355\u5feb\u901f\uff0c\u4e0d\u4f1a\u8fc7\u62df\u5408<\/td><\/tr><tr><td>Polynomial<\/td><td>\u6620\u5c04\u5230\u591a\u9879\u5f0f<\/td><td>\u662f<\/td><td>\u2705 d, c<\/td><td>\u274c<\/td><td>\u80fd\u6355\u6349\u9ad8\u9636\u7279\u5f81\u7ec4\u5408<\/td><\/tr><tr><td>RBF<\/td><td>\u6620\u5c04\u5230\u65e0\u9650\u7ef4<\/td><td>\u662f<\/td><td>\u2705 \u03b3, C<\/td><td>\u2705 \u6700\u5e38\u7528<\/td><td>\u4e07\u80fd\u6838\u51fd\u6570\uff0c\u80fd\u5904\u7406\u590d\u6742\u8fb9\u754c<\/td><\/tr><tr><td>Tanh<\/td><td>\u7c7b\u795e\u7ecf\u7f51\u7edc\u6fc0\u6d3b<\/td><td>\u662f<\/td><td>\u2705 \u03ba, c<\/td><td>\u274c<\/td><td>\u6a21\u62df\u795e\u7ecf\u5143\u6fc0\u6d3b\u6548\u679c\uff0c\u5e38\u4e0d\u7a33\u5b9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc \u9009\u6838\u51fd\u6570\u65f6\u7684\u5efa\u8bae\uff1a<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4f60\u7684\u95ee\u9898<\/th><th>\u63a8\u8350\u6838<\/th><\/tr><\/thead><tbody><tr><td>\u6570\u636e\u8fd1\u4f3c\u7ebf\u6027<\/td><td>Linear \u6838<\/td><\/tr><tr><td>\u6570\u636e\u7279\u5f81\u6709\u4ea4\u4e92\/\u591a\u9879\u5f0f\u5f62\u5f0f<\/td><td>Polynomial \u6838<\/td><\/tr><tr><td>\u6570\u636e\u7ed3\u6784\u590d\u6742\/\u4e0d\u6e05\u695a\u7ed3\u6784<\/td><td>RBF \u6838\uff08\u9996\u9009\uff09<\/td><\/tr><tr><td>\u505a\u7814\u7a76\u3001\u7c7b\u6bd4\u795e\u7ecf\u7f51\u7edc<\/td><td>Tanh \u6838\uff08\u8bd5\u8bd5\u770b\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1622\" height=\"1630\" src=\"https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13.png\" alt=\"\u6b63\u6587\u56fe\u72471\" class=\"wp-image-3084\" srcset=\"https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13.png 1622w, https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13-300x300.png 300w, https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13-1019x1024.png 1019w, https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13-150x150.png 150w, https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13-768x772.png 768w, https:\/\/www.leexinghai.com\/aic\/wp-content\/uploads\/2025\/08\/image-13-1528x1536.png 1528w\" sizes=\"auto, (max-width: 1622px) 100vw, 1622px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>SVM\u5185\u6838\u603b\u7ed3\uff08\u89c6\u9891P66\uff09 \u56db\u79cd\u7ecf\u5178\u6838\u51fd\u6570\uff1a \ud83d\udfe9 1. Linear \u6838\uff08\u7ebf\u6027\u6838\uff09 \ud83d\udcd0 \u6570\u5b66\u5f62\u5f0f\uff1a K(x, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3045,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[],"class_list":["post-3083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mlsh"],"_links":{"self":[{"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/posts\/3083","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/comments?post=3083"}],"version-history":[{"count":7,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/posts\/3083\/revisions"}],"predecessor-version":[{"id":3178,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/posts\/3083\/revisions\/3178"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/media\/3045"}],"wp:attachment":[{"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/media?parent=3083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/categories?post=3083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.leexinghai.com\/aic\/wp-json\/wp\/v2\/tags?post=3083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}