{"id":16469,"date":"2023-12-05T10:34:58","date_gmt":"2023-12-05T02:34:58","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=16469"},"modified":"2023-12-16T10:58:23","modified_gmt":"2023-12-16T02:58:23","slug":"elasticsearch-zhong-de-xiang-guan-xing-he-de-fen","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/05\/elasticsearch-zhong-de-xiang-guan-xing-he-de-fen\/","title":{"rendered":"Elasticsearch\u4e2d\u7684\u76f8\u5173\u6027\u548c\u5f97\u5206\uff1f"},"content":{"rendered":"<p>\u5728Elasticsearch\u4e2d\uff0c\u76f8\u5173\u6027\uff08Relevance\uff09\u548c\u5f97\u5206\uff08Score\uff09\u662f\u641c\u7d22\u7ed3\u679c\u6392\u5e8f\u7684\u5173\u952e\u56e0\u7d20\uff0c\u7528\u4e8e\u8861\u91cf\u67e5\u8be2\u4e0e\u6587\u6863\u7684\u5339\u914d\u7a0b\u5ea6\u3002\u4ee5\u4e0b\u662f\u76f8\u5173\u6027\u548c\u5f97\u5206\u7684\u57fa\u672c\u6982\u5ff5\uff1a<\/p>\n<h3><a id=\"%E7%9B%B8%E5%85%B3%E6%80%A7%EF%BC%88relevance%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u76f8\u5173\u6027\uff08Relevance\uff09\uff1a<\/h3>\n<p>\u76f8\u5173\u6027\u662f\u6307\u641c\u7d22\u5f15\u64ce\u6839\u636e\u67e5\u8be2\u6761\u4ef6\u548c\u6587\u6863\u4e4b\u95f4\u7684\u5339\u914d\u7a0b\u5ea6\u6765\u8bc4\u4f30\u548c\u6392\u5e8f\u641c\u7d22\u7ed3\u679c\u7684\u8fc7\u7a0b\u3002\u76f8\u5173\u6027\u5206\u6570\u8861\u91cf\u4e86\u6587\u6863\u4e0e\u67e5\u8be2\u7684\u5339\u914d\u7a0b\u5ea6\uff0c\u4ee5\u4fbf\u5c06\u6700\u76f8\u5173\u7684\u6587\u6863\u6392\u5728\u524d\u9762\u3002<\/p>\n<h3><a id=\"%E5%BE%97%E5%88%86%EF%BC%88score%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5f97\u5206\uff08Score\uff09\uff1a<\/h3>\n<p>\u5f97\u5206\u662f\u4e00\u4e2a\u6570\u503c\uff0c\u7528\u4e8e\u8868\u793a\u6587\u6863\u4e0e\u67e5\u8be2\u7684\u76f8\u5173\u6027\u7a0b\u5ea6\u3002Elasticsearch \u4f7f\u7528\u590d\u6742\u7684\u7b97\u6cd5\u6765\u8ba1\u7b97\u6587\u6863\u7684\u5f97\u5206\uff0c\u8be5\u7b97\u6cd5\u8003\u8651\u4e86\u591a\u4e2a\u56e0\u7d20\uff0c\u5305\u62ec\u8bcd\u9891\u3001\u5b57\u6bb5\u957f\u5ea6\u3001\u6587\u6863\u9891\u7387\u7b49\u3002\u6587\u6863\u7684\u5f97\u5206\u8d8a\u9ad8\uff0c\u8868\u793a\u5b83\u4e0e\u67e5\u8be2\u8d8a\u5339\u914d\uff0c\u4ece\u800c\u5728\u641c\u7d22\u7ed3\u679c\u4e2d\u6392\u540d\u8d8a\u9760\u524d\u3002<\/p>\n<h3><a id=\"%E5%BE%97%E5%88%86%E8%AE%A1%E7%AE%97%E8%A6%81%E7%B4%A0%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u5f97\u5206\u8ba1\u7b97\u8981\u7d20\uff1a<\/h3>\n<ol>\n<li>\n<strong>\u8bcd\u9891\uff08Term 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Length\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u8861\u91cf\u6587\u6863\u4e2d\u5b57\u6bb5\u7684\u957f\u5ea6\u3002\u76f8\u540c\u8bcd\u9891\u60c5\u51b5\u4e0b\uff0c\u8f83\u77ed\u7684\u5b57\u6bb5\u53ef\u80fd\u5f97\u5206\u66f4\u9ad8\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u6587\u6863\u9891\u7387\uff08Document Frequency\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u8861\u91cf\u5305\u542b\u67e5\u8be2\u8bcd\u7684\u6587\u6863\u6570\u91cf\u3002\u6587\u6863\u9891\u7387\u8d8a\u9ad8\uff0cIDF\u8d8a\u4f4e\uff0c\u5f97\u5206\u8d8a\u4f4e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5f52\u4e00\u5316\uff08Normalization\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u901a\u8fc7\u5bf9\u5f97\u5206\u8fdb\u884c\u5f52\u4e00\u5316\uff0c\u786e\u4fdd\u8f83\u77ed\u7684\u6587\u6863\u4e0e\u8f83\u957f\u7684\u6587\u6863\u4e4b\u95f4\u7684\u5f97\u5206\u6bd4\u8f83\u5408\u7406\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3><a id=\"%E7%A4%BA%E4%BE%8B%E6%9F%A5%E8%AF%A2%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u793a\u4f8b\u67e5\u8be2\uff1a<\/h3>\n<pre><code class=\"language-json\">GET \/my_index\/_search\n{\n  &quot;query&quot;: {\n    &quot;match&quot;: {\n      &quot;title&quot;: &quot;elasticsearch tutorial&quot;\n    }\n  }\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cElasticsearch\u4f1a\u4e3a\u6bcf\u4e2a\u6587\u6863\u8ba1\u7b97\u5f97\u5206\uff0c\u7136\u540e\u6839\u636e\u5f97\u5206\u5bf9\u641c\u7d22\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\uff0c\u6700\u76f8\u5173\u7684\u6587\u6863\u6392\u5728\u524d\u9762\u3002<\/p>\n<h3><a id=\"%E8%B0%83%E6%95%B4%E7%9B%B8%E5%85%B3%E6%80%A7%E5%92%8C%E5%BE%97%E5%88%86%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u8c03\u6574\u76f8\u5173\u6027\u548c\u5f97\u5206\uff1a<\/h3>\n<p>\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u67e5\u8be2\u53c2\u6570\u3001\u4f7f\u7528\u66f4\u590d\u6742\u7684\u67e5\u8be2DSL\u3001\u81ea\u5b9a\u4e49\u8bc4\u5206\u811a\u672c\u7b49\u65b9\u5f0f\u6765\u5f71\u54cd\u5f97\u5206\u548c\u76f8\u5173\u6027\u7684\u8ba1\u7b97\uff0c\u4ee5\u6ee1\u8db3\u7279\u5b9a\u7684\u641c\u7d22\u9700\u6c42\u3002<\/p>\n<p>\u603b\u4f53\u800c\u8a00\uff0c\u76f8\u5173\u6027\u548c\u5f97\u5206\u662fElasticsearch\u641c\u7d22\u5f15\u64ce\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u901a\u8fc7\u7efc\u5408\u8003\u8651\u591a\u4e2a\u56e0\u7d20\uff0c\u5b83\u4eec\u786e\u4fdd\u641c\u7d22\u7ed3\u679c\u6309\u7167\u4e0e\u67e5\u8be2\u7684\u5339\u914d\u7a0b\u5ea6\u8fdb\u884c\u6709\u6548\u6392\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Elasticsearch\u4e2d\uff0c\u76f8\u5173\u6027\uff08Relevance\uff09\u548c\u5f97\u5206\uff08Score\uff09\u662f\u641c\u7d22\u7ed3\u679c\u6392\u5e8f\u7684\u5173\u952e\u56e0\u7d20\uff0c\u7528\u4e8e [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[125],"tags":[],"class_list":["post-16469","post","type-post","status-publish","format-standard","hentry","category-elasticsearch"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=16469"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16469\/revisions"}],"predecessor-version":[{"id":48396,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16469\/revisions\/48396"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=16469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=16469"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=16469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}