{"id":352855,"date":"2021-02-21T09:45:00","date_gmt":"2021-02-21T01:45:00","guid":{"rendered":"http:\/\/4563.org\/?p=352855"},"modified":"2021-02-21T09:45:00","modified_gmt":"2021-02-21T01:45:00","slug":"%e6%b1%82%e6%ad%a3%e6%80%81%e5%88%86%e5%b8%83%e6%a0%87%e5%87%86%e5%b7%ae%cf%83","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=352855","title":{"rendered":"\u6c42\u6b63\u6001\u5206\u5e03\u6807\u51c6\u5dee\u03c3"},"content":{"rendered":"
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\u6c42\u6b63\u6001\u5206\u5e03\u6807\u51c6\u5dee\u03c3 <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : fuxinya <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5df2\u77e5\u67d0\u6b63\u6001\u5206\u5e03\u03bc=550, \u843d\u5728 518~560 \u533a\u95f4\u7684\u7d2f\u8ba1\u6982\u7387\u4e3a 80%, \u6c42\u03c3<\/p>\n

\u6709\u6ca1\u6709\u5927\u795e\u7ed9\u51fa\u6c42\u89e3\u516c\u5f0f?<\/p>\n

\u6216\u4f7f\u7528Java<\/code>\u6c42\u89e3<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (12<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Ultraman <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \"\u6c42\u6b63\u6001\u5206\u5e03\u6807\u51c6\u5dee\u03c3\"<\/p>\n

    \u76f4\u63a5\u67e5\u8868\u5012\u7740\u7b97\uff1f<\/p>\n

    https:\/\/zh.wikipedia.org\/zh-cn\/%E6%AD%A3%E6%80%81%E5%88%86%E5%B8%83 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Ultraman <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Ultraman #1 \u5bf9\u4e0d\u8d77\uff0c\uff0c\u8bf7\u5ffd\u7565\u6211 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : fuxinya <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Ultraman \u67e5\u8868\u4e5f\u53ef \u53ea\u8981\u8bef\u5dee\u4e0d\u5927\u5c31\u884c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7ed9\u4e3b\u4e00\u4e2a\u601d\u8def\uff1a\u7528 Erf \u5199\u51fa\u4f60\u7684\u65b9\u7a0b\uff0c\u7136\u540e\u7528\u725b\u987f\u8fed\u4ee3\u6cd5\u89e3\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \"\u6c42\u6b63\u6001\u5206\u5e03\u6807\u51c6\u5dee\u03c3\"<\/p>\n

    \u8fd9\u4e2a\u662f\u8981\u89e3\u7684\u65b9\u7a0b\u3002\u5728\u4f60\u7684\u95ee\u9898\u91cc\uff0cmu=550,l=518,r=560,p=0.8 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u987a\u4fbf\u591a\u8bf4\u4e00\u5634\uff1a\u5982\u679c\u662f\u5355\u8fb9\u6216\u8005\u5bf9\u79f0\u7684\u5c31\u5bb9\u6613\u591a\u4e86\u3002\u56e0\u4e3a\u5355\u8fb9\u7684\u8bdd\uff0c\u628a erf \u51fd\u6570\u653e\u5230\u4e00\u8fb9\uff0c\u7136\u540e\u76f4\u63a5\u7528 erf \u53cd\u51fd\u6570\u5c31\u884c\u4e86\u3002C \u8bed\u8a00\u548c numpy \u90fd\u6709 erf \u548c erf \u53cd\u51fd\u6570\u7684\u6570\u503c\u5b9e\u73b0\u7684\u3002\u3002\u3002\u53ef\u60dc\u4f60\u662f\u53cc\u8fb9\u4e0d\u5bf9\u79f0 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : fuxinya <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ipwx \u611f\u8c22\u89e3\u7b54, \u521a\u67e5\u8d44\u6599\u4e5f\u770b\u89c1\u4e86 erf \u53cd\u51fd\u6570 \u8fd9\u5c31\u53bb\u8bd5\u8bd5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : lcdtyph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u80fd\u8c03 mathematica \u7684\u8bdd\u53ef\u4ee5\u76f4\u63a5\u76f4\u63a5<\/p>\n

    G[x_] := CDF[NormalDistribution[550, sigma], x];
    FindRoot[G[560] – G[518] == 0.8 , {sigma, 1}]<\/p>\n

    \u89e3\u51fa\u6765 sigma=11.7233 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ipwx <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @lcdtyph Mathematica \u679c\u7136\u725b\u903c\uff0c\u81ea\u52a8\u5e2e\u641e\u5b9a\u5404\u79cd\u6c42\u6839\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : lcdtyph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ipwx
    \u662f\u7684\uff0c\u7b26\u53f7\u8fd0\u7b97\u592a\u5f3a\u5927\u4e86
    \u540c\u6837\u529f\u80fd\u7684\u4ee3\u7801\u6211\u7528 matlab \u5199\u8d77\u6765\u8fd9\u4e2a\u522b\u626d <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : fuxinya <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @lcdtyph 666 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : SharkU <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u81ea\u5df1\u5199\u7684 Matlab \u4ee3\u7801
    % main script
    tolerance = 1e-8;
    residual = Inf;
    sigma = 15;
    h = 1e-6;
    while residual > tolerance
    der = (cdfeq(sigma+h) – cdfeq(sigma-h))\/h;
    sigma = sigma -cdfeq(sigma)\/der
    residual = abs(cdfeq(sigma));
    end<\/p>\n

    % cdfeq function
    function output = cdfeq( sigma)
    % \u65b9\u7a0b: f(sigma) – 0.8 = 0
    output = normcdf(560, 550, sigma) – normcdf(518, 550, sigma) – 0.8;
    end <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    \u6c42\u6b63\u6001\u5206\u5e03\u6807\u51c6\u5dee\u03c3 \u8cc7\u6df1\u5927\u4f6c : …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/352855"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=352855"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/352855\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=352855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=352855"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=352855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}