{"id":188828,"date":"2024-11-12T02:13:26","date_gmt":"2024-11-11T18:13:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188828\/"},"modified":"2024-11-12T02:13:27","modified_gmt":"2024-11-11T18:13:27","slug":"%e6%8e%a2%e7%b4%a2%e6%ad%a3%e6%85%8b%e6%9b%b2%e7%b7%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%87%89%e7%94%a8%e8%88%87%e5%af%a6%e7%8f%be-%e6%ad%a3%e6%85%8b%e6%9b%b2%e7%b7%9a%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188828\/","title":{"rendered":"\u63a2\u7d22\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u7684\u61c9\u7528\u8207\u5be6\u73fe (\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e6%8e%a2%e7%b4%a2%e6%ad%a3%e6%85%8b%e6%9b%b2%e7%b7%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%87%89%e7%94%a8%e8%88%87%e5%af%a6%e7%8f%be-ukHypJBbQQ\">\u63a2\u7d22\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u7684\u61c9\u7528\u8207\u5be6\u73fe<\/h1>\n<p>\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\uff08Normal Distribution Database\uff09\u662f\u4e00\u7a2e\u57fa\u65bc\u6b63\u614b\u5206\u4f48\u7684\u6578\u64da\u5b58\u5132\u548c\u7ba1\u7406\u7cfb\u7d71\u3002\u6b63\u614b\u5206\u4f48\u662f\u7d71\u8a08\u5b78\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u9818\u57df\uff0c\u5305\u62ec\u793e\u6703\u79d1\u5b78\u3001\u81ea\u7136\u79d1\u5b78\u548c\u5de5\u7a0b\u5b78\u7b49\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u7684\u61c9\u7528\u3001\u5be6\u73fe\u65b9\u5f0f\u4ee5\u53ca\u5176\u5728\u6578\u64da\u5206\u6790\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e6%ad%a3%e6%85%8b%e5%88%86%e4%bd%88%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ukHypJBbQQ\">\u6b63\u614b\u5206\u4f48\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6b63\u614b\u5206\u4f48\uff0c\u53c8\u7a31\u9ad8\u65af\u5206\u4f48\uff0c\u662f\u4e00\u7a2e\u9023\u7e8c\u6982\u7387\u5206\u4f48\uff0c\u5176\u6982\u7387\u5bc6\u5ea6\u51fd\u6578\u5448\u9418\u5f62\u66f2\u7dda\u3002\u5176\u6578\u5b78\u8868\u9054\u5f0f\u70ba\uff1a<\/p>\n<pre><code>f(x) = (1 \/ (\u03c3\u221a(2\u03c0))) * e^(-((x - \u03bc)\u00b2 \/ (2\u03c3\u00b2)))<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c\u03bc\u70ba\u5747\u503c\uff0c\u03c3\u70ba\u6a19\u6e96\u5dee\u3002\u6b63\u614b\u5206\u4f48\u7684\u7279\u6027\u4f7f\u5176\u5728\u6578\u64da\u5206\u6790\u4e2d\u5177\u6709\u91cd\u8981\u610f\u7fa9\uff0c\u56e0\u70ba\u8a31\u591a\u81ea\u7136\u73fe\u8c61\u548c\u793e\u6703\u73fe\u8c61\u90fd\u9075\u5faa\u9019\u4e00\u5206\u4f48\u3002<\/p>\n<h2 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id=\"%e6%ad%a3%e6%85%8b%e6%9b%b2%e7%b7%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%af%a6%e7%8f%be-ukHypJBbQQ\">\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u7684\u5be6\u73fe<\/h2>\n<p>\u5be6\u73fe\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u9700\u8981\u8003\u616e\u6578\u64da\u7684\u6536\u96c6\u3001\u5b58\u5132\u548c\u5206\u6790\u7b49\u591a\u500b\u65b9\u9762\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5be6\u73fe\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e6%94%b6%e9%9b%86-ukHypJBbQQ\">1. 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\u6578\u64da\u5b58\u5132<\/h3>\n<p>\u6536\u96c6\u5230\u7684\u6578\u64da\u9700\u8981\u5b58\u5132\u5728\u6578\u64da\u5eab\u4e2d\u3002\u53ef\u4ee5\u9078\u64c7\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\uff09\u6216\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MongoDB\uff09\u4f86\u5b58\u5132\u6578\u64da\u3002\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u985e\u578b\u53d6\u6c7a\u65bc\u6578\u64da\u7684\u7279\u6027\u548c\u61c9\u7528\u9700\u6c42\u3002<\/p>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e5%88%86%e6%9e%90-ukHypJBbQQ\">3. \u6578\u64da\u5206\u6790<\/h3>\n<p>\u6578\u64da\u5b58\u5132\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u7d71\u8a08\u5206\u6790\u5de5\u5177\uff08\u5982R\u3001Python\u7684Pandas\u5eab\uff09\u5c0d\u6578\u64da\u9032\u884c\u5206\u6790\u3002\u901a\u904e\u8a08\u7b97\u5747\u503c\u3001\u6a19\u6e96\u5dee\u7b49\u7d71\u8a08\u6307\u6a19\uff0c\u53ef\u4ee5\u5224\u65b7\u6578\u64da\u662f\u5426\u7b26\u5408\u6b63\u614b\u5206\u4f48\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u53ef\u8996\u5316\u5c55\u793a\u3002<\/p>\n<pre><code>import pandas as pd\nimport numpy as np\nimport matplotlib.pyplot as plt\nfrom scipy import stats\n\n# \u751f\u6210\u96a8\u6a5f\u6578\u64da\ndata = np.random.normal(loc=0, scale=1, size=1000)\n\n# \u7e6a\u88fd\u76f4\u65b9\u5716\nplt.hist(data, bins=30, density=True, alpha=0.6, color='g')\n\n# \u7e6a\u88fd\u6b63\u614b\u66f2\u7dda\nmu, std = stats.norm.fit(data)\nxmin, xmax = plt.xlim()\nx = np.linspace(xmin, xmax, 100)\np = stats.norm.pdf(x, mu, std)\nplt.plot(x, p, 'k', linewidth=2)\nplt.title('\u6b63\u614b\u5206\u4f48\u793a\u4f8b')\nplt.show()\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ukHypJBbQQ\">\u7d50\u8ad6<\/h2>\n<p>\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u5728\u6578\u64da\u5206\u6790\u4e2d\u5177\u6709\u91cd\u8981\u7684\u61c9\u7528\u50f9\u503c\uff0c\u7121\u8ad6\u662f\u5728\u5546\u696d\u3001\u88fd\u9020\u9084\u662f\u91ab\u5b78\u9818\u57df\u3002\u901a\u904e\u5408\u7406\u7684\u6578\u64da\u6536\u96c6\u3001\u5b58\u5132\u548c\u5206\u6790\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5229\u7528\u6b63\u614b\u5206\u4f48\u7684\u7279\u6027\u4f86\u89e3\u6c7a\u5be6\u969b\u554f\u984c\u3002\u96a8\u8457\u6578\u64da\u79d1\u5b78\u7684\u767c\u5c55\uff0c\u6b63\u614b\u66f2\u7dda\u6578\u64da\u5eab\u7684\u61c9\u7528\u5c07\u6703\u66f4\u52a0\u5ee3\u6cdb\uff0c\u70ba\u5404\u884c\u5404\u696d\u63d0\u4f9b\u66f4\u70ba\u7cbe\u78ba\u7684\u6578\u64da\u652f\u6301\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> 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