{"id":3343,"date":"2022-02-27T15:14:46","date_gmt":"2022-02-27T07:14:46","guid":{"rendered":"https:\/\/egonlin.com\/?p=3343"},"modified":"2022-02-27T15:14:46","modified_gmt":"2022-02-27T07:14:46","slug":"%e7%ac%ac%e5%85%ab%e7%af%87%ef%bc%9a%e6%8b%89%e6%a0%bc%e6%9c%97%e6%97%a5%e5%af%b9%e5%81%b6%e6%80%a7","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=3343","title":{"rendered":"\u7b2c\u516b\u7bc7\uff1a\u62c9\u683c\u6717\u65e5\u5bf9\u5076\u6027"},"content":{"rendered":"<h1>\u62c9\u683c\u6717\u65e5\u5bf9\u5076\u6027<\/h1>\n<p>&emsp;&emsp;\u5728\u7ea6\u675f\u6700\u4f18\u5316\u95ee\u9898\u4e2d\uff0c\u62c9\u683c\u6717\u65e5\u5bf9\u5076\u6027(Lagrange duality)\u53ef\u4ee5\u5c06\u539f\u59cb\u95ee\u9898\u8f6c\u6362\u4e3a\u5bf9\u5076\u95ee\u9898\uff0c\u7136\u540e\u901a\u8fc7\u6c42\u89e3\u5bf9\u5076\u95ee\u9898\u7684\u89e3\u5f97\u5230\u539f\u59cb\u95ee\u9898\u7684\u89e3\u3002<\/p>\n<h1>\u539f\u59cb\u95ee\u9898<\/h1>\n<h2>\u7ea6\u675f\u6700\u4f18\u5316\u95ee\u9898<\/h2>\n<p>&emsp;&emsp;\u5047\u8bbe$f(x),c_i(x),h<em>j(x)$\u662f\u5b9a\u4e49\u5728$R^n$\u4e0a\u7684\u8fde\u7eed\u53ef\u5fae\u51fd\u6570\uff0c\u5219\u7ea6\u675f\u6700\u4f18\u5316\u95ee\u9898\u7684\u539f\u59cb\u95ee\u9898\u4e3a<br \/>\n$$<br \/>\n\\begin{align}<br \/>\n&amp; \\underbrace{min}<\/em>{x\\in{R^n}}f(x) \\<br \/>\n&amp; s.t. \\, c_i(x)\\leq0,\\quad{i=1,2,\\cdots,k} \\<br \/>\n&amp; h<em>j(x)=0,\\quad{j=1,2,\\cdots,l}<br \/>\n\\end{align}<br \/>\n$$<br \/>\n&emsp;&emsp;\u5982\u679c\u4e0d\u8003\u8651\u7ea6\u675f\u6761\u4ef6\uff0c\u7ea6\u675f\u95ee\u9898\u5c31\u662f<br \/>\n$$<br \/>\n\\underbrace{min}<\/em>{x\\in{R^n}}f(x)<br \/>\n$$<br \/>\n&emsp;&emsp;\u56e0\u4e3a\u5df2\u7ecf\u5047\u8bbe$f(x),c_i(x),h_j(x)$\u8fde\u7eed\u53ef\u5fae\uff0c\u76f4\u63a5\u5bf9$f(x)$\u6c42\u5bfc\u53d60\uff0c\u5373\u53ef\u6c42\u51fa\u6700\u4f18\u89e3\uff0c\u4f46\u662f\u8fd9\u91cc\u6709\u7ea6\u675f\u6761\u4ef6\uff0c\u56e0\u6b64\u5f97\u60f3\u529e\u6cd5\u53bb\u6389\u7ea6\u675f\u6761\u4ef6\uff0c\u800c\u62c9\u683c\u6717\u65e5\u51fd\u6570\u6b63\u662f\u5e72\u8fd9\u4e2a\u7684\u3002<\/p>\n<h2>\u5e7f\u4e49\u62c9\u683c\u6717\u65e5\u51fd\u6570<\/h2>\n<p>&emsp;&emsp;\u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u539f\u59cb\u95ee\u9898\uff0c\u5f15\u5165\u5e7f\u4e49\u62c9\u683c\u6717\u65e5\u51fd\u6570(generalized Lagrange function)<br \/>\n$$<br \/>\nL(x,\\alpha,\\beta)=f(x)+\\sum_{i=1}^k\\alpha_ic<em>i(x)+\\sum<\/em>{j=1}^l\\beta_jh_j(x)<br \/>\n$$<br \/>\n\u5176\u4e2d$x=(x^{(1)},x^{(2)},\\cdots,x^{(n)})^T\\in{R^n}$\uff0c$\\alpha_i\\geq0,\\beta_j$\u662f\u62c9\u683c\u6717\u65e5\u4e58\u5b50\u3002<\/p>\n<p>&emsp;&emsp;\u5982\u679c\u628a$L(x,\\alpha,\\beta)$\u770b\u4f5c\u662f\u5173\u4e8e$\\alpha_i,\\beta<em>j$\u7684\u51fd\u6570\uff0c\u6c42\u5176\u6700\u5927\u503c\uff0c\u5373<br \/>\n$$<br \/>\n\\underbrace{max}<\/em>{\\alpha,\\beta}L(x,\\alpha,\\beta)<br \/>\n$$<br \/>\n&emsp;&emsp;\u7531\u4e8e$\\alpha_i,\\beta_j$\u4f5c\u4e3a\u62c9\u683c\u6717\u65e5\u4e58\u5b50\u5df2\u7ecf\u53ef\u77e5\uff0c\u56e0\u6b64\u53ef\u4ee5\u628a$L(x,\\alpha,\\beta)$\u770b\u4f5c\u662f\u5173\u4e8e$x$\u7684\u51fd\u6570<br \/>\n$$<br \/>\n\\theta<em>P(x)=\\underbrace{max}<\/em>{\\alpha,\\beta}L(x,\\alpha,\\beta)<br \/>\n$$<br \/>\n\u5176\u4e2d\u4e0b\u6807$P$\u8868\u793a\u539f\u59cb\u95ee\u9898\u3002<\/p>\n<h2>\u7ea6\u675f\u6761\u4ef6\u7684\u8003\u8651<\/h2>\n<p><\/p><div id=\"rml_readmorelogin_placeholder\" style=\"position:relative;\"><div id=\"rml_fade_content\" 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href=\"https:\/\/egonlin.com\/wp-login.php?action=lostpassword\">Forgotten username or password?<\/a><\/div><div id=\"StatusBarFooter\"><\/div><\/div><\/div><div id=aru_remaining_content><\/div>","protected":false},"excerpt":{"rendered":"<p>\u62c9\u683c\u6717\u65e5\u5bf9\u5076\u6027 &emsp;&emsp;\u5728\u7ea6\u675f\u6700\u4f18\u5316\u95ee\u9898\u4e2d\uff0c\u62c9\u683c\u6717\u65e5\u5bf9\u5076\u6027(Lagrange duality) [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[276,303,304],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/3343"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3343"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/3343\/revisions"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}