{"id":188,"date":"2023-02-03T16:05:22","date_gmt":"2023-02-03T08:05:22","guid":{"rendered":"http:\/\/39.104.58.144\/?p=188"},"modified":"2023-02-25T20:50:10","modified_gmt":"2023-02-25T12:50:10","slug":"357198717-1","status":"publish","type":"post","link":"http:\/\/www.algmain.com\/index.php\/2023\/02\/03\/357198717-1\/","title":{"rendered":"\u76f8\u5173\u7cfb\u6570\u2014\u2014\u7075\u611f\u6765\u6e90"},"content":{"rendered":"\n<p>\u76f8\u5173\u7cfb\u6570\u7684\u7075\u611f\u6765\u6e90\uff0c\u4e0e\u6982\u7387\u6ca1\u4ec0\u4e48\u5173\u7cfb\uff0c\u5012\u662f\u4e0e\u7269\u7406\u4e0a\u7684\u7535\u8def\u6709\u4e00\u70b9\u5173\u7cfb\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"143\" height=\"109\" src=\"http:\/\/39.104.58.144\/wp-content\/uploads\/2023\/02\/v2-6865aac5c96475b5946c7747cd91aeb5_1440w.png\" alt=\"\" class=\"wp-image-189\"\/><\/figure>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u7535\u963b\\(R_1\\)\u548c\u7535\u963b\\(R_2\\)\u4e32\u8054\u540e\uff0c\u518d\u4e0e\u7535\u963b\\(R_3\\)\u5e76\u8054\u3002\u7535\u963b\\(R_3\\)\u4e24\u7aef\u4e0e\u7535\u963b\\(R_1\\)\u548c\u7535\u963b\\(R_2\\)\u4e32\u8054\u7684\u7535\u8def\u5177\u6709\u76f8\u540c\u7684\u7535\u538b\u3002\u5982\u679c\u9700\u8981\u6d41\u7ecf\u7535\u963b\\(R_3\\)\u7684\u7535\u6d41\u6bd4\u8f83\u5927\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7535\u963b\u4e4b\u95f4\u7684\u963b\u503c\u5e94\u5f53\u6ee1\u8db3\uff1a\\(R_3 \\le R_1 + R_2 \\)\u3002<\/p>\n\n\n\n<p>\u5982\u679c<strong>\u628a\u7535\u963b\u201c\u7c7b\u6bd4\u201d\u6210\u5b57\u7b26\u4e32\uff1a\u7535\u963b\\(R_i\\)\u5bf9\u5e94\u4e8e\u5b57\u7b26\u4e32\\(s_i\\)\uff0c\u5176\u7535\u5bfc\u7387\\({\\sigma _i} = \\frac{1}{{{R_i}}}\\)\u5bf9\u5e94\u4e8e\u5b57\u7b26\u4e32\u7684\u7edf\u8ba1\u8bcd\u9891\\(f_i\\)\u3002\u5176\u7edf\u8ba1\u8bcd\u9891<strong>\\(f_i\\)<\/strong>\u8d8a\u5927\uff0c\u610f\u5473\u7740\u7535\u5bfc\u7387<strong>\\(\\sigma _i\\)<\/strong>&nbsp;\u8d8a\u5927\uff0c\u7535\u963b<strong>\\(R_i\\)<\/strong>\u7684\u963b\u503c\u8d8a\u5c0f\u3002\u540c\u7b49\u9605\u8bfb\u201c\u538b\u529b\u201d\u4e0b\uff08\u5373\u540c\u7b49\u7535\u538b\u4e0b\uff09\uff0c\u201c\u7535\u6d41\u201d\u5c31\u4f1a\u8d8a\u5927\uff0c\u9605\u8bfb\u5c31\u4f1a\u8d8a\u987a\u7545\u3002<\/strong><\/p>\n\n\n\n<p>\u5bf9\u4e8e\u56fe\u4e2d\u7684\u7535\u8def\uff0c\u7535\u963b\\(R_3\\)\u53ef\u4ee5\u5bf9\u5e94\u4e8e\u7531\u5b57\u7b26\u4e32\\(s_1\\)\u548c\\(s_2\\)\u62fc\u63a5\u800c\u6210\u7684\u5b57\u7b26\u4e32\\(s_3\\)\u3002\u5982\u679c\u5b57\u7b26\u4e32\\(s_1\\)\u548c\\(s_2\\)\u6709\u7ec4\u5408\u6210\u65b0\u8bcd\u6c47\u7684\u503e\u5411\uff0c\u90a3\u4e48\u7535\u963b\\(R_3\\)\u7684\u963b\u503c\uff0c\u5c31\u4e0d\u5e94\u5f53\u8d85\u8fc7\u4e32\u8054\u7535\u8def\u7684\u963b\u503c\u3002\u7531\u7535\u8def\u5e76\u4e32\u8054\u89c4\u5f8b\u53ef\u77e5\uff0c\u5982\u679c\u9700\u8981\u6d41\u7ecf\u7535\u963b\\(R_3\\)\u7684\u7535\u6d41\u6bd4\u8f83\u5927\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7535\u963b\u4e4b\u95f4\u7684\u963b\u503c\u5e94\u5f53\u6ee1\u8db3\uff1a\\(R_3 \\le R_1 + R_2 \\)\u3002<\/p>\n\n\n\n<p>\u5373\uff1a\\( \\frac{1}{{{f_3}}} \\le \\frac{1}{{{f_1}}} + \\frac{1}{{{f_2}}} \\)<\/p>\n\n\n\n<p>\u56e0\u6b64\u53ef\u4ee5\u5b9a\u4e49\uff1a<\/p>\n\n\n\n<p>\\[ \\gamma \\propto \\frac{{{\\sigma _1} + {\\sigma _2}}}{{{\\sigma _3}}} = \\frac{{\\frac{1}{{{f_1}}} + \\frac{1}{{{f_2}}}}}{{\\frac{1}{{{f_3}}}}} = {f_3}(\\frac{1}{{{f_1}}} + \\frac{1}{{{f_2}}}) \\]<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4f1a\u53d1\u73b0\u5176\u5b9e\u7531\u5b57\u7b26\u4e32\\(s_1\\)\u548c\\(s_2\\)\u62fc\u63a5\u800c\u6210\u7684\u5b57\u7b26\u4e32\\(s_3\\)\u7684\u7edf\u8ba1\u8bcd\u9891\\(f_3\\)\u4e00\u822c\u662f\u8fdc\u5c0f\u4e8e\u671f\u671b\u503c\u3002<\/li>\n\n\n\n<li>\u6b64\u65f6\\( \\gamma \\)\u7684\u53d6\u503c\u8303\u56f4\u8fd8\u4e0e\u53c2\u6570\u4e2a\u6570\u6709\u4e00\u5b9a\u5173\u7cfb\u3002\u53ef\u4ee5\u901a\u8fc7\u9664\u4ee5\u53c2\u6570\u4e2a\u6570\uff08\u5373\\( \\gamma ^* = \\frac{\\gamma}{2}  \\)\uff09\u5c06\u53d6\u503c\u8303\u56f4\u5f52\u4e00\u5316\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6700\u7ec8\u53ef\u4ee5\u5f97\u5230\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p>\\[ \\gamma = \\frac{{{f_3}}}{2}(\\frac{1}{{{f_1}}} + \\frac{1}{{{f_2}}}) \\]<\/p>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7\u4f8b\u4e3e\u66f4\u591a\u7535\u963b\u4e32\u8054\u7684\u60c5\u51b5\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u6700\u7ec8\u7684\u76f8\u5173\u7cfb\u6570\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p>\\[ \\gamma (s|s_1,s_2,&#8230;&#8230;,s_N) = \\frac{f}{N}\\sum\\limits_{i = 1}^N {\\frac{1}{{{f_i}}}} \\]<\/p>\n\n\n\n<p>\u867d\u7136\u8fd9\u6837\u5f97\u5230\u516c\u5f0f\u6709\u70b9\u7275\u5f3a\u9644\u4f1a\uff0c\u4e0d\u8fc7\u6700\u7ec8\u53ef\u4ee5\u901a\u8fc7\u6570\u5b66\u89d2\u5ea6\u5206\u6790\uff0c\u5f97\u51fa\u5408\u7406\u7684\u89e3\u91ca\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76f8\u5173\u7cfb\u6570\u7684\u7075\u611f\u6765\u6e90\uff0c\u4e0e\u6982\u7387\u6ca1\u4ec0\u4e48\u5173\u7cfb\uff0c\u5012\u662f\u4e0e\u7269\u7406\u4e0a\u7684\u7535\u8def\u6709\u4e00\u70b9\u5173\u7cfb\u3002 \u5982\u56fe\u6240\u793a\uff0c\u7535\u963b\u548c\u7535\u963b\u4e32\u8054\u540e\uff0c\u518d\u4e0e\u7535\u963b\u5e76\u8054 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[5,19,18,55],"class_list":["post-188","post","type-post","status-publish","format-standard","hentry","category-theory","tag-nlp","tag-19","tag-18","tag-55"],"_links":{"self":[{"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/posts\/188"}],"collection":[{"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/comments?post=188"}],"version-history":[{"count":17,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/posts\/188\/revisions"}],"predecessor-version":[{"id":414,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/posts\/188\/revisions\/414"}],"wp:attachment":[{"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/media?parent=188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/categories?post=188"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.algmain.com\/index.php\/wp-json\/wp\/v2\/tags?post=188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}