{"id":931,"date":"2025-04-03T19:35:13","date_gmt":"2025-04-03T11:35:13","guid":{"rendered":"http:\/\/heqiwei.cn\/?p=931"},"modified":"2025-04-03T19:35:13","modified_gmt":"2025-04-03T11:35:13","slug":"%e5%bd%92%e4%b8%80%e5%8c%96%e8%be%93%e5%85%a5","status":"publish","type":"post","link":"https:\/\/heqiwei.cn\/index.php\/2025\/04\/03\/%e5%bd%92%e4%b8%80%e5%8c%96%e8%be%93%e5%85%a5\/","title":{"rendered":"\u5f52\u4e00\u5316\u8f93\u5165"},"content":{"rendered":"\n<p>\u5047\u8bbe\u8bad\u7ec3\u96c6\u539f\u59cb\u6570\u636e\u5206\u5e03\u5982\u4e0b\uff1a<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"253\" height=\"169\" data-original=\"http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-937\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u7b2c\u4e00\u6b65\uff1a\u96f6\u5747\u503c\u5316<\/strong><\/p>\n\n\n\n<p>[math]\\mu=\\frac{1}{m} \\sum_{i=1}^{m} x^{(i)}[\/math]<\/p>\n\n\n\n<p>[math]x = x &#8211; \\mu[\/math]<\/p>\n\n\n\n<p>\u5373\u8ba1\u7b97\u6570\u636e\u7684\u5747\u503c\uff0c\u7136\u540e\u5e73\u79fb\u5750\u6807\u7cfb\uff0c\u53e6\u5747\u503c\u5f52\u96f6\u3002<\/p>\n\n\n\n<p>\u96f6\u5747\u503c\u5316\u540e\uff0c\u6570\u636e\u5206\u5e03\u53d8\u4e3a\u5982\u4e0b\u60c5\u51b5\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-6.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"158\" data-original=\"http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-6.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-938\"\/><\/div><\/figure>\n\n\n\n<p><strong>\u7b2c\u4e8c\u6b65\uff1a\u5f52\u4e00\u5316\u65b9\u5dee<\/strong><\/p>\n\n\n\n<p>[math]x = x &#8211; \\mu [\/math]<\/p>\n\n\n\n<p>[math]\\sigma^{2}=\\frac{1}{m} \\sum_{i=1}^{m}\\left(x^{(i)}\\right)^{2}[\/math]<\/p>\n\n\n\n<p>\u5c06\u8f93\u5165\u6570\u636e\u5404\u7ef4\u5ea6\u7684\u65b9\u5dee\u8c03\u6574\u81f3\u5747\u8861\uff0c\u65b9\u4fbf\u540e\u7eed\u7684\u68af\u5ea6\u4e0b\u964d\u3002<\/p>\n\n\n\n<p>\u65b9\u5dee\u5f52\u4e00\u5316\u540e\uff0c\u6570\u636e\u5206\u5e03\u53d8\u4e3a\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"265\" height=\"164\" data-original=\"http:\/\/heqiwei.cn\/wp-content\/uploads\/2025\/04\/image-7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-939\"\/><\/div><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u6570\u636e\u66f4\u52a0\u5206\u6563\uff0c\u5e76\u4e14\u4e24\u4e2a\u7ef4\u5ea6\u7684\u5206\u5e03\u8f83\u5747\u5300\u3002<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color 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\u7b2c\u4e00\u6b65\uff1a\u96f6\u5747\u503c\u5316 [math]\\mu=\\frac{1}{m} \\sum_{i=1 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