{"id":1659,"date":"2020-09-03T15:23:56","date_gmt":"2020-09-03T07:23:56","guid":{"rendered":"http:\/\/home.wangjianshuo.com\/cn\/?p=1659"},"modified":"2020-09-03T15:23:56","modified_gmt":"2020-09-03T07:23:56","slug":"%e5%bd%b1%e5%93%8d%e5%8a%9b%e5%85%ac%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/home.wangjianshuo.com\/cn\/20200903_%e5%bd%b1%e5%93%8d%e5%8a%9b%e5%85%ac%e5%bc%8f.htm","title":{"rendered":"\u5f71\u54cd\u529b\u516c\u5f0f"},"content":{"rendered":"
\n

\u5728\u5de5\u4f5c\u4e2d\u6700\u6709\u7528\u7684\u4e00\u79cd\u5206\u7c7b\u6cd5\u5c31\u662f\u628a\u4eba\u5206\u4e3a\u5f71\u54cd\u529b\u9ad8\u7684\u548c\u5f71\u54cd\u529b\u4f4e\u7684\u3002\u5f71\u54cd\u529b\u5728\u6211\u7684\u5b9a\u4e49\u91cc\u9762\u4e25\u683c\u7b49\u4e8e\u201c\u8ba9\u4e8b\u60c5\u53d1\u751f\u7684\u80fd\u529b\u201d (The ability to make things happen)\u3002<\/p>\n

\u4f5c\u4e3a\u4e00\u4e2a\u7406\u79d1\u751f\uff0c\u5982\u679c\u4e0d\u80fd\u62ff\u6570\u5b66\u8868\u8fbe\u4e00\u4e2a\u6982\u5ff5\u603b\u89c9\u7684\u81ea\u5df1\u6ca1\u60f3\u6e05\u695a\u3002\u6240\u4ee5\u6211\u505a\u4e86\u5982\u4e0b\u7684\u516c\u5f0f\u6765\u5206\u6790\u5f71\u54cd\u529b\u3002<\/p>\n

\u6211\u4eec\u5b9a\u4e49Y\u662f\u4e8b\u60c5\u53d1\u751f\u7684\u7a0b\u5ea6\uff0c\u6216\u8005\u53ef\u4ee5\u4e5f\u53ef\u4ee5\u7b80\u5355\u7684\u5b9a\u4e49\u4e3a\u4e8b\u60c5\u662f\u5426\u53d1\u751f\uff081\u6216\u80050\uff09\u3002 Y\u662f\u5f88\u591a\u56e0\u7d20\u7684\u51fd\u6570\uff1a<\/p>\n

Y = <\/p>\n

x0\u5230xn\u5206\u522b\u4ee3\u8868\u8981\u8ba9\u4e8b\u60c5\u6210\u529f\u7684\u6240\u6709\u7684\u56e0\u7d20\u3002<\/p>\n

x0\u5b9a\u4e49\u4e3a\u6211\u4eec\u6240\u5173\u6ce8\u7684\u90a3\u4e2a\u4eba\u7684\u56e0\u7d20\uff0c\u5176\u4ed6\u7684\u53ef\u4ee5\u662f\u4efb\u4f55\u5f71\u54cd\u6210\u529f\u7684\u56e0\u7d20\uff0c\u6bd4\u5982x1\u5b9a\u4e49\u4e3a\u6240\u5728\u7684\u516c\u53f8\uff0cx2\u5b9a\u4e49\u4e3a\u4ed6\u7684\u7ecf\u7406\uff0cx3\u5b9a\u4e49\u4e3a\u4ed6\u7684\u56e2\u961f\uff0cx4\u5b9a\u4e49\u4e3a\u5b8f\u89c2\u73af\u5883\uff0cx5\u5b9a\u4e49\u4e3a\u7ade\u4e89\u5bf9\u624b\uff0cx100\u5b9a\u4e49\u4e3a\u5929\u6c14\uff0cx101\u5b9a\u4e49\u4e3a\u662f\u5426\u6709\u6050\u6016\u88ad\u51fb\u7b49\u7b49\u3002\u8fd9\u4e2a\u6982\u5ff5\u7684\u8868\u8fbe\u5f0f\u5c31\u662f\u5728\u8868\u8fbe\u4e00\u4e2a\u4e8b\u60c5\u7684\u6210\u529f\u771f\u7684\u662f\u7531\u5f88\u591a\u7684\u56e0\u7d20\u51b3\u5b9a\u7684\u3002<\/p>\n

\u6bcf\u4e2a\u4eba\u505a\u4e0d\u6210\u4e00\u4ef6\u4e8b\u60c5\u4e00\u5b9a\u4f1a\u5217\u4e3ex1\u5230xn\u4e2d\u95f4\u7684\u67d0\u4e2a\u539f\u56e0\u3002\u800c\u6211\u8ba4\u4e3a\uff0c\u5f53\u4e00\u4ef6\u4e8b\u60c5\u7684\u6210\u8d25\u548cx0\u5173\u7cfb\u8d8a\u5927\u5c31\u8bf4\u660e\u8fd9\u4e2a\u4eba\u7684\u5f71\u54cd\u529b\u8d8a\u5927\uff0c\u8ddfx0\u4ee5\u5916\u7684\u90e8\u5206\u5173\u7cfb\u8d8a\u5927\u5c31\u8bf4\u660e\u8fd9\u4e2a\u4eba\u7684\u5f71\u54cd\u529b\u8d8a\u5c0f\u3002<\/p>\n

\u82e5\u662f\u7528\u7ebf\u6027\u8868\u8fbe\u5f0f\u6765\u975e\u5e38\u7c97\u7565\u7684\u8868\u8fbe\u51fd\u6570 f( ) \u7684\u8bdd\uff0c\u4e0a\u8ff0\u516c\u5f0f\u53ef\u4ee5\u53d8\u5f62\u4e3a\uff1a<\/p>\n

Y = a0 * x0 + a1 * x1 + a2 * x2 + … + an * xn<\/p>\n

a0 \u5230 an \u662f\u6307\u5b9a\u7684\u56e0\u7d20\u7684\u91cd\u8981\u5ea6\u7684\u56e0\u5b50\u3002<\/p>\n

\u6211\u628a\u4e00\u4e2a\u4eba\u7684\u5f71\u54cd\u529bi0\u5b9a\u4e49\u4e3a\uff1a\u00a0<\/p>\n

i0 = a0 \u00a0\/ ( a0 + a1 + a2 + … + an) * 100%<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u6b64\u4eba\u5bf9\u4e8e\u6210\u529f\u7684\u5f71\u54cd\u5360\u6240\u6709\u56e0\u7d20\u7684\u6bd4\u4f8b\u3002\u6bd4\u4f8b\u8d8a\u9ad8\uff0c\u5f71\u54cd\u529b\u8d8a\u9ad8\uff0c\u6216\u8005\u8bf4\u8ba9\u4e8b\u60c5\u53d1\u751f\u7684\u80fd\u529b\u5c31\u8d8a\u5927\u3002<\/p>\n

\u5373\u4fbf\u662f\u4e00\u4ef6\u4e8b\u60c5\u4e0d\u662f\u7531\u81ea\u5df1\u76f4\u63a5\u63a7\u5236\u7684\uff0c\u5f71\u54cd\u529b\u5f3a\u7684\u4eba\u603b\u6709\u529e\u6cd5\u628ax1\u5230xn\u4e2d\u95f4\u5f71\u54cd\u6bd4\u8f83\u5927\u7684\u56e0\u7d20\u53d8\u6210\u81ea\u5df1\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u6bd4\u5982x1 = f'(x0)\u3002\u82e5\u7528\u7ebf\u6027\u8868\u8fbe\uff0c\u5c31\u662f x1 = b * x0\u3002\u4ee3\u5165\u539f\u6765\u7684\u516c\u5f0f\uff0c\u4e00\u4e2a\u4e0d\u7a33\u5b9a\u7684\u56e0\u7d20\u6d88\u5931\u4e86\uff0ca0\u53d8\u5927\u4e86\uff0c\u4ece a0 \u53d8\u6210\u4e86 (a0 + b * a1)\u3002<\/p>\n

\u4eba\u7684\u5927\u8111\u5176\u5b9e\u90fd\u5728\u505a\u6570\u636e\u6316\u6398\u3002\u5f53\u8db3\u591f\u591a\u7684\u4e8b\u60c5\u7d2f\u79ef\u7684\u65f6\u5019\uff0c\u6211\u4eec\u7528\u6700\u7b80\u5355\u7684\u7ebf\u6027\u56de\u5f52\u5bf9\u90a3\u4e48\u591a\u4e8b\u60c5\u8fdb\u884c\u5206\u6790\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u4eba\u7684a0\u5230\u5e95\u662f\u591a\u5c11\u8fd8\u662f\u5fc3\u91cc\u6709\u6570\u7684\u3002\u4f60\u4f1a\u53d1\u73b0\u5c31\u662f\u6709\u4e00\u7fa4\u4eba\uff0c\u65e0\u8bbax1\u5230xn\u5bf9\u4e8e\u7ed3\u679c\u6709\u591a\u5c11\u9006\u5411\u7684\u5f71\u54cd\uff0c\u4ed6\u603b\u80fd\u6bd4\u8f83\u5927\u6982\u7387\u7684\u505a\u6210\u4e00\u4ef6\u4e8b\u60c5\uff1b\u800c\u53e6\u5916\u4e00\u4e9b\u4eba\uff0c\u5373\u4f7f\u5728\u5916\u754c\u90fd\u987a\u98ce\u987a\u6c34\uff0c\u770b\u8d77\u6765\u4e0d\u5b58\u5728\u4ec0\u4e48\u5927\u7684\u53ef\u53d8\u56e0\u7d20\u7684\u65f6\u5019\u641e\u7838\u4e00\u4ef6\u4e8b\u60c5\u3002<\/p>\n

\u5f53\u4e00\u4ef6\u4e8b\u60c5\u505a\u4e0d\u6210\u7684\u65f6\u5019\uff0c\u6ca1\u5fc5\u8981\u53bb\u82b1\u592a\u591a\u7684\u7cbe\u529b\u53bb\u57cb\u6028x1\u5230xn\u4e0d\u914d\u5408\uff0c\u4ec5\u4ec5\u662f\u56e0\u4e3a\u81ea\u5df1\u7684a0\u4e0d\u591f\u5927\u800c\u5df2\u3002\u82e5\u662f\u6ca1\u6709x1\u5230xn\u8fd9\u4e9b\u56e0\u7d20\u7684\u7f81\u7eca\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u8ba9\u4e8b\u60c5\u53d1\u751f\u7684\u4ebax0\u6765\u505a\u4ec0\u4e48\u5462\uff1f<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u5728\u5de5\u4f5c\u4e2d\u6700\u6709\u7528\u7684\u4e00\u79cd\u5206\u7c7b\u6cd5\u5c31\u662f\u628a\u4eba\u5206\u4e3a\u5f71\u54cd\u529b\u9ad8\u7684\u548c\u5f71\u54cd\u529b\u4f4e\u7684\u3002\u5f71\u54cd\u529b\u5728\u6211\u7684\u5b9a\u4e49\u91cc\u9762\u4e25\u683c\u7b49\u4e8e\u201c\u8ba9\u4e8b\u60c5\u53d1\u751f\u7684\u80fd\u529b\u201d … \u7ee7\u7eed\u9605\u8bfb\u5f71\u54cd\u529b\u516c\u5f0f<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/posts\/1659"}],"collection":[{"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/comments?post=1659"}],"version-history":[{"count":1,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/posts\/1659\/revisions"}],"predecessor-version":[{"id":1660,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/posts\/1659\/revisions\/1660"}],"wp:attachment":[{"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/media?parent=1659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/categories?post=1659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/home.wangjianshuo.com\/cn\/wp-json\/wp\/v2\/tags?post=1659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}