{"id":2195,"date":"2025-10-11T15:55:55","date_gmt":"2025-10-11T07:55:55","guid":{"rendered":"https:\/\/zero-zl.cn\/?p=2195"},"modified":"2025-10-11T15:55:56","modified_gmt":"2025-10-11T07:55:56","slug":"%e2%9c%85%e6%b4%be%e8%81%aa%e6%98%8e-rag-%e7%9f%a5%e8%af%86%e5%ba%93%e6%a3%80%e7%b4%a2%e9%9d%a2%e8%af%95%e9%a2%98%e9%a2%84%e6%b5%8b%ef%bc%8c%e8%a6%86%e7%9b%96-elasticsearch-%e7%9a%84-knn-%e5%92%8c-bm2","status":"publish","type":"post","link":"https:\/\/zero-zl.cn\/index.php\/2025\/10\/11\/%e2%9c%85%e6%b4%be%e8%81%aa%e6%98%8e-rag-%e7%9f%a5%e8%af%86%e5%ba%93%e6%a3%80%e7%b4%a2%e9%9d%a2%e8%af%95%e9%a2%98%e9%a2%84%e6%b5%8b%ef%bc%8c%e8%a6%86%e7%9b%96-elasticsearch-%e7%9a%84-knn-%e5%92%8c-bm2\/","title":{"rendered":"\u2705\u6d3e\u806a\u660e RAG \u77e5\u8bc6\u5e93\u68c0\u7d22\u9762\u8bd5\u9898\u9884\u6d4b\uff0c\u8986\u76d6 ElasticSearch \u7684 KNN \u548c BM25"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"uGydI\">1.\u5f53\u4e00\u4e2a\u7528\u6237\u5728\u641c\u7d22\u6846\u91cc\u8f93\u5165\u4e00\u53e5\u8bdd\u7136\u540e\u70b9\u51fb\u641c\u7d22\uff0c\u7cfb\u7edf\u5927\u81f4\u4f1a\u7ecf\u5386\u4e00\u4e2a\u600e\u6837\u7684\u5904\u7406\u6d41\u7a0b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u7528\u6237\u901a\u8fc7\u524d\u7aef\u9875\u9762\u8f93\u5165\u641c\u7d22\u5185\u5bb9\u5e76\u63d0\u4ea4\uff0c\u524d\u7aef\u4f1a\u5c06\u67e5\u8be2\u8bed\u53e5\u3001\u7528\u6237\u4fe1\u606f\u7b49\u53c2\u6570\u5c01\u88c5\u6210 HTTP \u8bf7\u6c42\u53d1\u9001\u5230\u540e\u7aef\u3002\u540e\u7aef\u63a5\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4f1a\u89e3\u6790\u51fa\u67e5\u8be2\u5173\u952e\u8bcd\u548c\u7528\u6237\u8eab\u4efd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fdb\u5165\u641c\u7d22\u903b\u8f91\u524d\uff0c\u7cfb\u7edf\u9996\u5148\u4f1a\u8c03\u7528\u5916\u90e8\u7684 Embedding \u6a21\u578b\u5c06\u7528\u6237\u7684\u81ea\u7136\u8bed\u8a00\u67e5\u8be2\u8f6c\u5316\u4e3a\u5411\u91cf\u8868\u793a\u3002\u8fd9\u4e00\u6b65\u662f\u5b9e\u73b0\u8bed\u4e49\u76f8\u4f3c\u5ea6\u641c\u7d22\u7684\u57fa\u7840\u3002\u540c\u65f6\uff0c\u7cfb\u7edf\u8fd8\u4f1a\u63d0\u53d6\u51fa\u7528\u6237\u5bf9\u5e94\u7684\u7ec4\u7ec7\u6807\u7b7e\uff0c\u7528\u4e8e\u540e\u7eed\u7684\u6743\u9650\u8fc7\u6ee4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u968f\u540e\uff0c\u7cfb\u7edf\u4f1a\u6784\u9020\u51fa\u4e00\u4e2a Elasticsearch \u6df7\u5408\u67e5\u8be2\u3002\u878d\u5408\u4e86\u4e09\u7c7b\u80fd\u529b\uff1a\u9996\u5148\u662f\u57fa\u4e8e\u67e5\u8be2\u5411\u91cf\u7684 KNN \u8bed\u4e49\u68c0\u7d22\uff0c\u7528\u4e8e\u627e\u51fa\u8bed\u4e49\u4e0a\u6700\u63a5\u8fd1\u7684\u6587\u672c\u5757\uff1b\u5176\u6b21\u662f\u57fa\u4e8e\u5173\u952e\u8bcd\u7684 BM25 \u68c0\u7d22\uff0c\u7528\u4e8e\u5339\u914d\u5173\u952e\u8bcd\u76f8\u4f3c\u7684\u6587\u6863\uff1b\u6700\u540e\u662f\u6743\u9650\u8fc7\u6ee4\u673a\u5236\uff0c\u786e\u4fdd\u8fd4\u56de\u7684\u6587\u6863\u5fc5\u987b\u662f\u516c\u5f00\u7684\u3001\u6216\u5c5e\u4e8e\u8be5\u7528\u6237\u672c\u4eba\uff0c\u6216\u5176\u7ec4\u7ec7\u6807\u7b7e\u5728\u7528\u6237\u7684\u6709\u6548\u6807\u7b7e\u5217\u8868\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u63d0\u9ad8\u7ed3\u679c\u7684\u76f8\u5173\u6027\u548c\u7cbe\u5ea6\uff0c\u6211\u4eec\u8fd8\u4f1a\u4f7f\u7528 Elasticsearch \u7684 rescore \u673a\u5236\uff0c\u6839\u636e BM25 \u4e0e\u5411\u91cf\u5339\u914d\u7684\u5f97\u5206\u5bf9\u521d\u6b65\u53ec\u56de\u7684\u7ed3\u679c\u8fdb\u884c\u91cd\u6392\u5e8f\uff0c\u627e\u5230\u6700\u7ec8\u6392\u540d\u9760\u524d\u7684\u6587\u6863\uff0c\u5e76\u6253\u5206\u540e\u8fd4\u56de\u7ed9\u524d\u7aef\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/4b3ce24a7e39aadb678c00e89716f0cc-scaled.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1509\" height=\"2560\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/4b3ce24a7e39aadb678c00e89716f0cc-scaled.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2196\"  sizes=\"auto, (max-width: 1509px) 100vw, 1509px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ec0\u4e48\u662f KNN\uff1f<a href=\"https:\/\/www.elastic.co\/cn\/what-is\/knn\">https:\/\/www.elastic.co\/cn\/what-is\/knn<\/a><\/li>\n\n\n\n<li>\u4ec0\u4e48\u662f BM25\uff1a<a href=\"https:\/\/www.elastic.co\/cn\/blog\/practical-bm25-part-2-the-bm25-algorithm-and-its-variables\">https:\/\/www.elastic.co\/cn\/blog\/practical-bm25-part-2-the-bm25-algorithm-and-its-variables<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5907\u6ce8\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>kNN \u53c8\u79f0 k \u6700\u8fd1\u90bb\u7b97\u6cd5\uff0c\u4f1a\u4f7f\u7528\u4e34\u8fd1\u5ea6\u6765\u5c06\u4e00\u4e2a\u6570\u636e\u70b9\u4e0e\u8bad\u7ec3\u65f6\u6240\u4f7f\u7528\u5e76\u5df2\u8bb0\u4f4f\u7684\u4e00\u4e2a\u6570\u636e\u96c6\u8fdb\u884c\u5bf9\u6bd4\uff0c\u4ece\u800c\u505a\u51fa\u9884\u6d4b<\/strong>\u3002\u5176\u4e2d\u5b57\u6bcd k \u8868\u793a\u5728\u5206\u7c7b\u6216\u56de\u5f52\u95ee\u9898\u4e2d\u6240\u8003\u8651\u7684\u6700\u8fd1\u90bb\u7684\u6570\u91cf\uff0cNN \u4ee3\u8868 k \u6240\u9009\u6570\u5b57\u7684\u6700\u8fd1\u90bb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9762\u8bd5\u65f6\u53ef\u4ee5\u8fd9\u6837\u56de\u7b54\uff1akNN \u662f Elasticsearch \u7684\u4e00\u4e2a<strong>\u5411\u91cf\u76f8\u4f3c\u5ea6\u641c\u7d22\u529f\u80fd<\/strong>\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u641c\u7d22\u2018\u5185\u5bb9\u8bed\u4e49\u2019\u800c\u4e0d\u4ec5\u4ec5\u662f\u2018\u5173\u952e\u8bcd\u2019\u2014\u2014\u6bd4\u5982\u7528\u95ee\u9898\u5339\u914d\u77e5\u8bc6\u5e93\u7b54\u6848\uff0c\u672c\u8d28\u662f\u8ba9\u641c\u7d22\u5f15\u64ce\u5177\u5907\u2018\u8054\u60f3\u2019\u7684\u80fd\u529b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u60f3\u8c61\u4f20\u7edf\u56fe\u4e66\u9986\u7528\u5173\u952e\u8bcd\u67e5\u4e66\uff08BM25\uff09\uff0c\u800c kNN \u50cf\u4e00\u4f4d\u61c2\u5185\u5bb9\u7684\u56fe\u4e66\u7ba1\u5bb6\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5185\u5bb9\u8f6c\u5bc6\u7801\uff08Embedding\uff09\uff1a\u7ba1\u5bb6\u4f1a\u628a\u6bcf\u672c\u4e66\u7684\u6838\u5fc3\u601d\u60f3\uff08\u6587\u672c \/ \u56fe\u7247 \/ \u97f3\u9891\uff09\u7ffb\u8bd1\u6210\u4e00\u7ec4\u6570\u5b57\u5bc6\u7801\uff08\u5411\u91cf\uff09\uff0c\u6bd4\u5982\u300a\u4e09\u56fd\u6f14\u4e49\u300b\u53ef\u80fd\u7f16\u7801\u4e3a\u00a0<code>[0.8, -0.2, 0.3,...]<\/code>\u3002<\/li>\n\n\n\n<li>\u76f8\u4f3c\u5373\u90bb\u8fd1\uff08\u5411\u91cf\u7a7a\u95f4\uff09\uff1a\u5185\u5bb9\u76f8\u4f3c\u7684\u4e66\uff0c\u6570\u5b57\u5bc6\u7801\u5728\u5750\u6807\u7cfb\u4e2d\u7684\u8ddd\u79bb\u8d8a\u8fd1\uff08\u6bd4\u5982\u300a\u6c34\u6d52\u4f20\u300b\u9760\u8fd1\u300a\u4e09\u56fd\u6f14\u4e49\u300b\uff0c\u8fdc\u79bb\u300a\u91cf\u5b50\u529b\u5b66\u300b\uff09\u3002<\/li>\n\n\n\n<li>\u6309\u8ddd\u79bb\u63a8\u8350\uff08kNN \u67e5\u8be2\uff09\uff1a\u5f53\u4f60\u95ee\uff1a\u201c\u627e\u548c\u300a\u4e09\u56fd\u6f14\u4e49\u300b\u98ce\u683c\u7c7b\u4f3c\u7684\u4e66\u201d\uff0c\u7ba1\u5bb6\u7acb\u523b\u5728\u5750\u6807\u7cfb\u4e2d\u9501\u5b9a\u79bb\u5b83\u6700\u8fd1\u7684 k \u672c\u4e66\uff08k=5 \u5c31\u662f\u627e\u6700\u76f8\u4f3c\u7684 5 \u672c\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Elasticsearch \u4e2d\uff0ckNN \u901a\u8fc7\u4e24\u7c7b\u65b9\u5f0f\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Exact kNN\uff1a\u66b4\u529b\u8ba1\u7b97\u76ee\u6807\u5411\u91cf\u4e0e\u6240\u6709\u5411\u91cf\u7684\u8ddd\u79bb\uff0c\u8bed\u6cd5\u4e0a\u7528 knn \u67e5\u8be2 + vector \u5b57\u6bb5\u3002<\/li>\n\n\n\n<li>ANN\uff08Approximate Nearest Neighbor\uff09\uff1a\u4f7f\u7528 HNSW \u7b97\u6cd5\uff08\u5206\u5c42\u5bfc\u822a\u5c0f\u4e16\u754c\uff09\u5efa\u7acb\u5411\u91cf\u7d22\u5f15\uff0c\u8bed\u6cd5\u4e0a\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u5b9a\u4e49\u00a0<code>\"type\": \"dense_vector\" + \"index\": true<\/code><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u793a\u4f8b\uff1aHNSW \u7d22\u5f15\u5b9a\u4e49\nPUT my_index\n{\n  \"mappings\": {\n    \"properties\": {\n      \"content_vector\": {\n        \"type\": \"dense_vector\",  \/\/ \u5411\u91cf\u7c7b\u578b\n        \"dims\": 768,             \/\/ \u7ef4\u5ea6\u6570\uff08\u9700\u4e0e\u6a21\u578b\u5339\u914d\uff09\n        \"index\": true,           \/\/ \u542f\u7528ANN\u7d22\u5f15\n        \"similarity\": \"cosine\"   \/\/ \u76f8\u4f3c\u5ea6\u7b97\u6cd5\uff08\u4f59\u5f26\/\u70b9\u79ef\/L2\uff09\n      }\n    }\n  }\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">BM25 \u662f Elasticsearch \u7684\u9ed8\u8ba4\u641c\u7d22\u8bc4\u5206\u7b97\u6cd5\uff0c\u5b83\u7684\u6838\u5fc3\u4efb\u52a1\u662f \u5224\u65ad\u6587\u6863\u548c\u641c\u7d22\u5173\u952e\u8bcd\u7684\u76f8\u5173\u6027\u3002\u53ef\u4ee5\u628a\u5b83\u60f3\u8c61\u6210\u4e00\u4e2a\u516c\u5e73\u7684\u88c1\u5224\u2014\u2014\u4e0d\u4ec5\u770b\u5173\u952e\u8bcd\u51fa\u73b0\u6b21\u6570\uff0c\u8fd8\u8981\u770b\u5173\u952e\u8bcd\u7684\u201c\u542b\u91d1\u91cf\u201d\uff0c\u540c\u65f6\u9632\u6b62\u957f\u6587\u6863\u4f5c\u5f0a\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5173\u952e\u8bcd\u5728 \u5f53\u524d\u6587\u6863 \u51fa\u73b0\u6b21\u6570\u8d8a\u591a\uff0c\u5f97\u5206\u8d8a\u9ad8\u3002<\/li>\n\n\n\n<li>\u5173\u952e\u8bcd\u5728 \u6240\u6709\u6587\u6863\u4e2d\u8d8a\u7a00\u6709\uff08\u6bd4\u5982\u201c\u91cf\u5b50\u8ba1\u7b97\u673a\u201d vs \u201c\u7684\u201d\uff09\uff0c\u542b\u91d1\u91cf\u8d8a\u9ad8\uff0c\u5f97\u5206\u8d8a\u9ad8\u3002<\/li>\n\n\n\n<li>\u60e9\u7f5a\u957f\u6587\u6863\u704c\u6c34 \u2014\u2014 \u6bd4\u5982\u201c\u533a\u5757\u94fe\u201d\u5728 10 \u9875\u7684\u62a5\u544a\u4e2d\u51fa\u73b0 5 \u6b21\uff0c\u6bd4\u5728 100 \u9875\u7684\u6559\u6750\u4e2d\u51fa\u73b0 5 \u6b21\u66f4\u53ef\u4fe1\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7efc\u8ff0\uff1aBM25 \u662f Elasticsearch \u9ed8\u8ba4\u7684\u76f8\u5173\u6027\u6253\u5206\u7b97\u6cd5\uff0c\u5145\u5f53\u4e86\u4e00\u4e2a\u5f88\u806a\u660e\u7684\u88c1\u5224\u2014\u2014\u7528\u4e09\u628a\u5c3a\u5b50\u6765\u91cf\u6587\u6863\uff1a\u8bcd\u9891\uff08TF\uff09\u3001\u5173\u952e\u8bcd\u542b\u91d1\u91cf\uff08IDF\uff09\u3001\u4ee5\u53ca\u6587\u6863\u957f\u5ea6\u60e9\u7f5a\u673a\u5236\u3002\u6bd4\u5982\u641c\u7d22\u2018\u82f9\u679c\u624b\u673a\u2019\u65f6\uff0c\u5b83\u4f1a\u4f18\u5148\u9009\u805a\u7126\u4e3b\u9898\u7684\u77ed\u6587\uff0c\u800c\u975e\u6cdb\u6cdb\u800c\u8c08\u7684\u957f\u6587\uff0c\u540c\u65f6\u6291\u5236\u5806\u780c\u5173\u952e\u8bcd\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u6bd4\u65e7\u7b97\u6cd5\uff0cBM25 \u901a\u8fc7\u53c2\u6570&nbsp;<strong>k1<\/strong>&nbsp;\u548c&nbsp;<strong>b<\/strong>&nbsp;\u5e73\u8861\u4e86\u8bcd\u9891\u9971\u548c\u5ea6\u548c\u957f\u6587\u6863\u5e72\u6270\uff0c\u8ba9\u7ed3\u679c\u66f4\u8d34\u5408\u7528\u6237\u610f\u56fe\u3002<strong>\u7b80\u800c\u8a00\u4e4b\uff1a\u5b83\u8ba9\u641c\u7d22\u5f15\u64ce\u4ece\u2018\u6570\u6570\u2019\u8fdb\u5316\u5230\u4e86\u2018\u7406\u89e3\u5185\u5bb9\u4ef7\u503c\u2019\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Y6mIk\">2.\u8fd9\u548c\u6211\u4eec\u5e73\u65f6\u7528\u7684\u767e\u5ea6\u641c\u7d22\u4e00\u6837\u5417\uff1f\u8fd8\u662f\u6709\u4ec0\u4e48\u7279\u522b\u4e4b\u5904\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u76f8\u4f3c\u4e4b\u5904\uff0c\u4f46\u53c8\u4e0d\u592a\u4e00\u6837\u3002\u6211\u4eec\u8fd9\u5957\u641c\u7d22\u903b\u8f91\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u5728\u4f20\u7edf\u7684\u5173\u952e\u8bcd\u641c\u7d22\u7684\u57fa\u7840\u4e0a\u5f15\u5165\u4e86\u8bed\u4e49\u7406\u89e3\u7684\u80fd\u529b\uff0c\u5b83\u65e2\u4fdd\u7559\u4e86\u50cf\u767e\u5ea6\u90a3\u6837\u7684\u5173\u952e\u8bcd\u5339\u914d\u673a\u5236\uff0c\u4e5f\u878d\u5408\u4e86\u5411\u91cf\u68c0\u7d22\u8fd9\u79cd\u66f4\u667a\u80fd\u7684\u8bed\u4e49\u641c\u7d22\u80fd\u529b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7528\u6237\u53d1\u8d77\u67e5\u8be2\u65f6\uff0c\u7cfb\u7edf\u9996\u5148\u4f1a\u901a\u8fc7 embedding \u6a21\u578b\u628a\u8fd9\u53e5\u8bdd\u8f6c\u6210\u9ad8\u7ef4\u5411\u91cf\u3002\u8fd9\u4e2a\u5411\u91cf\u53ef\u4ee5\u7406\u89e3\u4e3a\u8fd9\u53e5\u8bdd\u7684\u201c\u8bed\u4e49\u7279\u5f81\u201d\uff0c\u540e\u7eed\u6211\u4eec\u4f1a\u7528\u8fd9\u4e2a\u7279\u5f81\u53bb\u505a KNN \u68c0\u7d22\uff0c\u627e\u5230\u8bed\u4e49\u4e0a\u76f8\u4f3c\u7684\u6587\u672c\u5757\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/2540c079d754110c409857f7e92cc2f8.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1966\" height=\"1168\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/2540c079d754110c409857f7e92cc2f8.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2211\"  sizes=\"auto, (max-width: 1966px) 100vw, 1966px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u5149\u6709\u8bed\u4e49\u76f8\u4f3c\u5ea6\u8fd8\u4e0d\u591f\uff0c\u6211\u4eec\u8fd8\u5f15\u5165\u4e86 BM25 \u7684\u5173\u952e\u8bcd\u5339\u914d\u3002\u56e0\u4e3a\u6709\u4e9b\u65f6\u5019\u7528\u6237\u4f1a\u8f93\u5165\u4e00\u4e2a\u4e13\u6709\u540d\u8bcd\uff0c\u6216\u8005\u7ec4\u7ec7\u5185\u90e8\u7684\u4e00\u4e9b\u672f\u8bed\uff0c\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u5173\u952e\u8bcd\u5339\u914d\u53cd\u800c\u6bd4\u8bed\u4e49\u66f4\u51c6\u3002\u6240\u4ee5\u6211\u4eec\u662f\u5148\u7528\u5411\u91cf\u53bb\u505a\u521d\u7b5b\uff0c\u518d\u901a\u8fc7 BM25 \u7684 rescore \u5bf9\u521d\u7b5b\u7ed3\u679c\u518d\u6392\u5e8f\uff0c\u8fd9\u6837\u80fd\u628a\u90a3\u4e9b\u201c\u8bed\u4e49\u5339\u914d + \u5173\u952e\u8bcd\u547d\u4e2d\u201d\u7684\u9ad8\u8d28\u91cf\u7ed3\u679c\u6392\u5230\u524d\u9762\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u505a\u4e86\u6743\u9650\u63a7\u5236\uff0c\u6bd4\u5982\u8bf4\u7528\u6237\u67e5\u8be2\u7684\u6587\u6863\u5fc5\u987b\u662f\u5728\u7528\u6237\u6240\u5728\u7684\u7ec4\u7ec7\u6807\u7b7e\u4e0b\uff0c\u6216\u8005\u5fc5\u987b\u662f\u516c\u5f00\u7684\u8d44\u6599\uff0c\u6216\u8005\u5fc5\u987b\u662f\u672c\u4eba\u4e0a\u4f20\u7684\u6587\u6863\u7b49\u7b49\uff0c\u8fd9\u4e9b\u4fe1\u606f\u6211\u4eec\u4f1a\u901a\u8fc7 filter \u7684\u65b9\u5f0f\u4e00\u5e76\u4f20\u7ed9 Elasticsearch\uff0c\u907f\u514d\u8fd4\u56de\u7528\u6237\u65e0\u6743\u9650\u67e5\u770b\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/04e75489e38df30a330ee859bc57b7d8-scaled.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"670\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/04e75489e38df30a330ee859bc57b7d8-scaled.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2209\"  sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4f53\u6765\u770b\uff0c\u4f20\u7edf\u641c\u7d22\u504f\u5411\u7684\u662f\u201c\u4f60\u8bf4\u4e86\u4ec0\u4e48\uff0c\u6211\u5c31\u627e\u4ec0\u4e48\u201d\uff0c\u800c RAG 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class=\"wp-image-2197\"  sizes=\"auto, (max-width: 1070px) 100vw, 1070px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u67b6\u6784\u89d2\u5ea6\u8bb2\uff0c\u8fd9\u79cd\u6df7\u5408\u68c0\u7d22\u4e5f\u662f\u6807\u51c6\u7684 RAG \u65b9\u6848\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"NhYlN\">3.\u4e3a\u4ec0\u4e48\u8981\u7528\u2018\u6df7\u5408\u68c0\u7d22\u2019\uff1f\u53ea\u7528\u5173\u952e\u8bcd\u6216\u8005\u53ea\u7528\u8bed\u4e49\uff0c\u5404\u81ea\u6709\u4ec0\u4e48\u5c40\u9650\u6027\u5417\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5173\u952e\u8bcd\u68c0\u7d22\uff0c\u6bd4\u5982\u4f20\u7edf\u7684 BM25\uff0c\u5b83\u7684\u4f18\u52bf\u5728\u4e8e\u76f4\u63a5\u3001\u9ad8\u6548\uff0c\u9002\u5408\u5904\u7406\u90a3\u4e9b\u6bd4\u8f83\u660e\u786e\u3001\u89c4\u8303\u7684\u67e5\u8be2\u8bcd\uff0c\u6bd4\u5982\u4ea7\u54c1\u7f16\u53f7\u3001\u9519\u8bef\u7801\u3001ID 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href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/89be37ffbfdc82a4b1ce8b7fb98315dc.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"864\" height=\"264\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/89be37ffbfdc82a4b1ce8b7fb98315dc.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2198\"  sizes=\"auto, (max-width: 864px) 100vw, 864px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f8\u53cd\uff0c\u8bed\u4e49\u68c0\u7d22\u6070\u597d\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u6211\u4eec\u901a\u8fc7\u8c46\u5305\u7684 embedding 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data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/63609c7a1d7a89c7fec858a4f25623d9.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/63609c7a1d7a89c7fec858a4f25623d9.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2203\"  sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u662f\u57fa\u4e8e\u8fd9\u4e9b\u8003\u8651\uff0c\u6d3e\u806a\u660e\u91c7\u7528\u4e86\u201c\u6df7\u5408\u68c0\u7d22\u201d\u7684\u7b56\u7565\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/b75994235c9d8dc82bb852e33648d782.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1974\" height=\"1194\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/b75994235c9d8dc82bb852e33648d782.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2199\"  sizes=\"auto, (max-width: 1974px) 100vw, 1974px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"UFUAT\">4.`topK`\u53c2\u6570\u662f\u7528\u6765\u505a\u4ec0\u4e48\u7684\uff1f\u7cfb\u7edf\u662f\u6309\u7167\u4ec0\u4e48\u6807\u51c6\u6765\u6392\u5e8f\u7684\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">topK \u7528\u6765\u63a7\u5236\u6700\u540e\u8fd4\u56de\u7ed9\u524d\u7aef\u7684\u7ed3\u679c\u6570\u91cf\uff0c\u9ed8\u8ba4\u662f 10 \u6761\u3002\u4f46\u771f\u6b63\u6709\u610f\u601d\u7684\u662f\uff0c\u8fd9\u4e2a topK \u5e76\u4e0d\u662f\u7b80\u5355\u5730\u201c\u67e510\u6761\u5c31\u7ed3\u675f\u201d\uff0c\u800c\u662f\u7ecf\u8fc7\u4e86\u4e24\u4e2a\u9636\u6bb5\u7684\u6df7\u5408\u6392\u5e8f\u6d41\u7a0b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u9636\u6bb5\u662f\u5411\u91cf\u53ec\u56de\uff0c\u4e3b\u8981\u770b\u8bed\u4e49\u76f8\u4f3c\u5ea6\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c\u7528\u6237\u95ee\u7684\u662f\u201c\u5982\u4f55\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u201d\uff0c\u90a3\u5373\u4fbf\u77e5\u8bc6\u5e93\u91cc\u6ca1\u6709\u5b8c\u5168\u4e00\u6837\u7684\u95ee\u9898\uff0c\u4f46\u53ea\u8981\u6709\u6587\u7ae0\u8ba8\u8bba\u7684\u662f\u201c\u65f6\u95f4\u7ba1\u7406\u6280\u5de7\u201d\u6216\u201c\u6548\u7387\u5de5\u5177\u63a8\u8350\u201d\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u8bed\u4e49\u7a7a\u95f4\u4e0a\u5f88\u63a5\u8fd1\uff0c\u4e5f\u80fd\u88ab\u53ec\u56de\u3002\u8fd9\u4e00\u6b65\u6211\u4eec\u4e00\u822c\u4f1a\u653e\u5bbd\u8303\u56f4\uff0c\u6bd4\u5982\u53ec\u56de topK \u7684 30 \u500d\uff0c\u8fd9\u6837\u80fd\u6700\u5927\u5316\u5730\u8986\u76d6\u8bed\u4e49\u76f8\u5173\u5185\u5bb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/9cc7d3acdb1768287a75e315039d246b.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1460\" height=\"1339\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/9cc7d3acdb1768287a75e315039d246b.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2202\"  sizes=\"auto, (max-width: 1460px) 100vw, 1460px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u4f1a\u8fdb\u5165\u7b2c\u4e8c\u9636\u6bb5\uff1a\u5173\u952e\u8bcd\u91cd\u6392\u3002\u6211\u4eec\u4f1a\u5bf9\u4e0a\u4e00\u6b65\u7684\u7ed3\u679c\u518d\u8dd1\u4e00\u6b21 BM25 \u7684\u5173\u952e\u8bcd\u5339\u914d\uff0c\u8fd9\u65f6\u5019\u5c31\u628a\u90a3\u4e9b\u65e2\u6709\u8bed\u4e49\u76f8\u5173\uff0c\u53c8\u5728\u5b57\u9762\u4e0a\u51fa\u73b0\u4e86\u5173\u952e\u8bcd\u7684\u6587\u6863\u5f80\u524d\u9762\u6392\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7ec8\uff0c\u7cfb\u7edf\u4f1a\u6839\u636e\u8fd9\u4e2a\u7efc\u5408\u5f97\u5206\uff0c\u4e5f\u5c31\u662f\u5411\u91cf\u5f97\u5206\u52a0\u5173\u952e\u8bcd\u5f97\u5206\u7684\u52a0\u6743\u7ed3\u679c\uff0c\u6392\u4e2a\u5e8f\uff0c\u7136\u540e\u8fd4\u56de topK \u6761\u7ed9\u524d\u7aef\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lUJbT\">5.\u4f60\u7528\u4ec0\u4e48\u5de5\u5177\u6765\u5b9e\u73b0\u8fd9\u4e2a\u2018\u6df7\u5408\u68c0\u7d22\u2019\u7684\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u7528\u7684\u662f Elasticsearch\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/aad302d648f9e1b418358a4b6f2748fb.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"900\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/aad302d648f9e1b418358a4b6f2748fb.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2206\"  sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u9009\u62e9 Elasticsearch \u7684\u4e3b\u8981\u539f\u56e0\u5728\u4e8e\u5b83\u7684\u5f00\u7bb1\u5373\u7528\u3002\u5b83\u4e0d\u4ec5\u662f\u4e00\u4e2a\u975e\u5e38\u6210\u719f\u7684\u7528\u4e8e\u5173\u952e\u8bcd\u5339\u914d\u7684\u5168\u6587\u641c\u7d22\u5f15\u64ce\uff0c\u4e5f\u652f\u6301\u7528\u4e8e\u8bed\u4e49\u76f8\u4f3c\u5ea6\u5339\u914d\u7684\u5411\u91cf\u68c0\u7d22\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"bHuvp\">6.\u8be6\u7ec6\u8bf4\u660e\u6df7\u5408\u68c0\u7d22\u7684\u5b9e\u73b0\u539f\u7406&#8230;\u5404\u81ea\u7684\u6743\u91cd\u662f\u5982\u4f55\u786e\u5b9a\u7684\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5e76\u4e0d\u662f\u7b80\u5355\u5730\u628a\u5173\u952e\u8bcd\u68c0\u7d22\u548c\u8bed\u4e49\u68c0\u7d22\u8fd9\u4e24\u79cd\u65b9\u5f0f\u201c\u5404\u81ea\u6267\u884c\u4e00\u6b21\uff0c\u7136\u540e\u628a\u7ed3\u679c\u5408\u5e76\u4e00\u4e0b\u201d\u3002\u6211\u4eec\u7528\u7684\u662f Elasticsearch \u5b98\u65b9\u63a8\u8350\u7684**\u201c\u53ec\u56de + \u91cd\u6392\u5e8f\uff08Recall + Rescore\uff09\u201d\u4e24\u9636\u6bb5\u7b56\u7565**\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7b2c\u4e00\u9636\u6bb5<\/strong>\uff0c\u6211\u4eec\u4f1a\u901a\u8fc7\u5411\u91cf\u68c0\u7d22\u5148\u4ece\u77e5\u8bc6\u5e93\u4e2d\u201c\u635e\u201d\u51fa\u4e00\u4e2a\u6bd4\u8f83\u5927\u7684\u5019\u9009\u96c6\uff0c\u6bd4\u5982\u662f topK \u7684 30 \u500d\u3002\u8fd9\u4e2a\u9636\u6bb5\u7684\u76ee\u6807\u5f88\u660e\u786e\uff0c\u5c31\u662f\u201c\u6c42\u5168\u201d\u3002\u4e0d\u7ba1\u641c\u7d22\u7684\u5185\u5bb9\u6807\u4e0d\u6807\u51c6\u3001\u610f\u601d\u7cbe\u4e0d\u7cbe\u51c6\uff0c\u53ea\u8981\u8bed\u4e49\u4e0a\u8ddf\u7528\u6237\u7684\u95ee\u9898\u76f8\u5173\uff0c\u6211\u4eec\u5c31\u90fd\u62ff\u51fa\u6765\uff0c\u4e0d\u653e\u8fc7\u4efb\u4f55\u4e00\u4e2a\u6f5c\u5728\u7684\u597d\u7ed3\u679c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7b2c\u4e8c\u9636\u6bb5<\/strong>\uff0c\u6211\u4eec\u7528\u8c03\u7528 Elasticsearch \u7684 rescore \u673a\u5236\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6211\u4eec\u4e0d\u518d\u5bf9\u6240\u6709\u6587\u6863\u505a\u5173\u952e\u8bcd\u5339\u914d\uff0c\u800c\u53ea\u662f\u5bf9\u521a\u521a\u53ec\u56de\u7684\u90a3\u4e00\u6279\u5019\u9009\u96c6\uff0c\u518d\u505a\u4e00\u6b21 BM25 \u7684\u5173\u952e\u8bcd\u6253\u5206\u3002\u8fd9\u4e2a\u9636\u6bb5\u7684\u76ee\u6807\u662f\u201c\u6c42\u51c6\u201d\u4e86\u2014\u2014 \u90a3\u4e9b\u8ddf\u7528\u6237\u5173\u952e\u8bcd\u5b8c\u5168\u5339\u914d\u7684\u7ed3\u679c\uff0c\u6216\u8005\u8bf4\u90a3\u4e9b\u201c\u8bf4\u5230\u70b9\u5b50\u4e0a\u201d\u7684\u7ed3\u679c\uff0c\u4f1a\u88ab\u8c03\u9ad8\u6392\u540d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u201c\u5148\u53ec\u56de\u3001\u540e\u91cd\u6392\u201d\u7684\u65b9\u5f0f\uff0c\u65e2\u5229\u7528\u4e86\u5411\u91cf\u68c0\u7d22\u7684\u5e7f\u5ea6\uff0c\u53c8\u5229\u7528\u4e86\u5173\u952e\u8bcd\u68c0\u7d22\u7684\u7cbe\u5ea6\uff0c\u5e76\u4e14\u6027\u80fd\u4e5f\u5f88\u9ad8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6743\u91cd\u8c03\u6574\u8fd9\u5757\u4e5f\u975e\u5e38\u7075\u6d3b\uff0c\u5411\u91cf\u67e5\u8be2\u6211\u4eec\u6682\u5b9a\u4e3a 0.2\uff0c\u91cd\u6392\u5e8f\u67e5\u8be2\u6211\u4eec\u6682\u5b9a\u4e3a\u5411\u91cf\u67e5\u8be2\u7684 5 \u500d\uff0c\u8fd9\u6837\u505a\u53ef\u4ee5\u4fdd\u7559\u4e00\u90e8\u5206\u5411\u91cf\u5206\u6570\uff0c\u540c\u65f6\uff0c\u53ef\u4ee5\u9632\u6b62\u90a3\u4e9b\u867d\u7136\u8bed\u4e49\u9ad8\u5ea6\u76f8\u5173\u4f46\u5173\u952e\u8bcd\u5339\u914d\u7a0d\u5dee\u7684\u4f18\u8d28\u7ed3\u679c\u88ab\u6392\u5230\u540e\u9762\u3002\u4ece\u5927\u91cf\u7684\u68c0\u7d22\u7ed3\u679c\u6765\u770b\uff0c\u76ee\u524d\u8fd9\u4e2a\u6743\u91cd\u662f\u6bd4\u8f83\u7b26\u5408\u9884\u671f\u7ed3\u679c\u7684\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.queryWeight(0.2d)            \/\/ KNN \u5206\u6570\u6743\u91cd\n.rescoreQueryWeight(1.0d)     \/\/ BM25 \u5206\u6570\u6743\u91cd\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Xn4W1\">7.\u5982\u4f55\u8bc4\u4f30\u4f60\u8fd9\u5957\u6df7\u5408\u68c0\u7d22\u7684\u7ed3\u679c\u8d28\u91cf\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u6784\u5efa\u4e00\u4e2a\u8bc4\u6d4b\u96c6\uff0c\u6bcf\u6761\u6837\u672c\u4f1a\u5305\u542b\u4e00\u4e2a\u7528\u6237\u7684\u67e5\u8be2\uff0c\u4e00\u7ec4\u6211\u4eec\u4eba\u5de5\u5224\u5b9a\u9ad8\u5ea6\u76f8\u5173\u7684\u6587\u6863\uff0c\u4ee5\u53ca\u4e00\u4e9b\u4e0d\u76f8\u5173\u7684\u6587\u6863\u4f5c\u4e3a\u5e72\u6270\u56e0\u5b50\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/af773ece7792abd72261bb5a3151a73a.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1972\" height=\"1174\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/af773ece7792abd72261bb5a3151a73a.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2201\"  sizes=\"auto, (max-width: 1972px) 100vw, 1972px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u7740\uff0c\u6211\u4eec\u901a\u8fc7\u8fd9\u4e9b\u7ef4\u5ea6\u6765\u8bc4\u6d4b\u68c0\u7d22\u7684\u7ed3\u679c\u8d28\u91cf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u770b topK \u91cc\u9762\u771f\u6b63\u76f8\u5173\u7684\u6bd4\u4f8b\uff1b<\/li>\n\n\n\n<li>\u770b\u6211\u4eec\u6709\u6ca1\u6709\u6f0f\u6389\u5173\u952e\u7684\u6587\u6863\uff1b<\/li>\n\n\n\n<li>\u7528\u6237\u662f\u5426\u80fd\u5728\u5f88\u524d\u9762\u5c31\u770b\u5230\u6ee1\u610f\u7b54\u6848\uff1b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0c\u53ef\u4ee5\u505a\u4e00\u4e2a&nbsp;<strong>A\/B \u6d4b\u8bd5<\/strong>\u3002\u6bd4\u5982\u8bf4\u653e\u51fa\u4e00\u4e2a\u65b0\u7684\u5b9e\u9a8c\u7248\u672c\uff0c\u8ba9 5% \u7684\u7528\u6237\u4f7f\u7528\u65b0\u7248\u641c\u7d22\u7b56\u7565\uff0c\u5176\u4ed6 95% \u7ee7\u7eed\u7528\u65e7\u7684\uff0c\u7136\u540e\u5bf9\u6bd4\u4e24\u7ec4\u7528\u6237\u7684\u884c\u4e3a\u6570\u636e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u70b9\u51fb\u7387<\/strong>\uff1a\u65b0\u7b97\u6cd5\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e0d\u662f\u66f4\u5438\u5f15\u7528\u6237\u53bb\u70b9\u51fb\uff1b<\/li>\n\n\n\n<li><strong>\u9996\u4e2a\u70b9\u51fb\u65f6\u957f<\/strong>\uff1a\u7528\u6237\u662f\u4e0d\u662f\u80fd\u66f4\u5feb\u5730\u627e\u5230\u6ee1\u610f\u7684\u7ed3\u679c\uff1b<\/li>\n\n\n\n<li><strong>\u7528\u6237\u505c\u7559\u65f6\u957f\u548c\u6ee1\u610f\u5ea6\u53cd\u9988<\/strong>\uff1a\u5224\u65ad\u7528\u6237\u662f\u4e0d\u662f\u89c9\u5f97\u201c\u8fd9\u4e2a\u7ed3\u679c\u9760\u8c31\u201d\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"EHW4E\">8.\u4f60\u7684ES\u7d22\u5f15Mapping\u91cc\u90fd\u5b9a\u4e49\u4e86\u54ea\u4e9b\u5173\u952e\u5b57\u6bb5\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u7684\u7d22\u5f15\u540d\u4e3a knowledge_base\uff0c\u5176\u6838\u5fc3\u5b57\u6bb5\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4e09\u7c7b\uff1a<strong>\u5185\u5bb9\u5b57\u6bb5\u3001\u5411\u91cf\u5b57\u6bb5\u3001\u6743\u9650\u5b57\u6bb5\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u662f\u5185\u5bb9\u5b57\u6bb5\uff0c\u6211\u4eec\u5b9a\u4e49\u4e3a textContent\uff0c\u5b83\u7684\u7c7b\u578b\u662f text\uff0c\u5e95\u5c42\u914d\u7684\u662f ik \u4e2d\u6587\u5206\u8bcd\u5668\u3002\u8fd9\u4e2a\u5b57\u6bb5\u662f\u7528\u6765\u652f\u6301\u5173\u952e\u8bcd\u68c0\u7d22\u7684\uff0c\u50cf BM25\u3001match \u67e5\u8be2\u90fd\u662f\u4f5c\u7528\u5728\u8fd9\u4e2a\u5b57\u6bb5\u4e0a\u3002\u901a\u8fc7\u4e2d\u6587\u5206\u8bcd\u5668\uff0c\u6211\u4eec\u80fd\u628a\u4e00\u53e5\u8bdd\u62c6\u5f97\u6bd4\u8f83\u7ec6\uff0c\u8fd9\u6837\u7528\u6237\u7528\u81ea\u7136\u8bed\u8a00\u8f93\u5173\u952e\u8bcd\u7684\u65f6\u5019\uff0c\u5339\u914d\u7684\u53ec\u56de\u7387\u548c\u51c6\u786e\u7387\u4f1a\u6bd4\u8f83\u597d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u662f\u5411\u91cf\u5b57\u6bb5\uff0c\u540d\u53eb vector\uff0c\u6211\u4eec\u5b9a\u4e49\u4e3a dense_vector \u7c7b\u578b\uff0c\u7ef4\u5ea6\u662f 2048\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u6211\u4eec\u7528\u7684\u5411\u91cf\u6a21\u578b\u662f \u8c46\u5305\u7684 2048 \u7ef4 embedding \u6a21\u578b\u3002\u8fd9\u4e2a\u5b57\u6bb5\u662f\u7528\u6765\u505a\u8bed\u4e49\u68c0\u7d22\u7684\uff0c\u6211\u4eec\u4f1a\u628a\u6bcf\u4e2a\u6587\u6863\u7247\u6bb5\u505a embedding\uff0c\u7136\u540e\u5b58\u5230\u8fd9\u4e2a\u5b57\u6bb5\u91cc\u3002\u5f53\u7528\u6237\u53d1\u8d77\u67e5\u8be2\u65f6\uff0c\u6211\u4eec\u4e5f\u4f1a\u628a\u67e5\u8be2\u7684\u5185\u5bb9\u8f6c\u6210\u5411\u91cf\uff0c\u518d\u7528 KNN \u7b97\u6cd5\u53bb\u6bd4\u76f8\u4f3c\u5ea6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u7740\u5c31\u662f\u6743\u9650\u76f8\u5173\u7684\u5b57\u6bb5\uff0c\u8fd9\u662f\u6211\u4eec\u5728\u505a B \u7aef\u591a\u79df\u6237\u573a\u666f\u65f6\u975e\u5e38\u91cd\u89c6\u7684\u4e00\u5757\u3002\u4e3b\u8981\u6709\u4e09\u4e2a\u5b57\u6bb5\uff1auserId\u3001orgTag \u548c isPublic\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>userId \u662f keyword \u7c7b\u578b\uff0c\u6807\u8bb0\u8fd9\u4e2a\u6587\u6863\u7247\u6bb5\u5c5e\u4e8e\u54ea\u4e2a\u7528\u6237\uff0c\u7528\u4e8e\u5b9e\u73b0\u79c1\u6709\u6587\u6863\u7684\u6743\u9650\u9694\u79bb\uff1b<\/li>\n\n\n\n<li>orgTag \u540c\u6837\u662f keyword \u7c7b\u578b\uff0c\u8868\u793a\u6587\u6863\u6240\u5c5e\u7684\u7ec4\u7ec7\u6807\u7b7e\uff0c\u7528\u6765\u63a7\u5236\u7ec4\u7ec7\u5185\u7684\u6388\u6743\u8bbf\u95ee\uff1b<\/li>\n\n\n\n<li>isPublic \u662f boolean \u7c7b\u578b\uff0c\u6807\u8bb0\u6587\u6863\u662f\u5426\u5bf9\u6240\u6709\u4eba\u516c\u5f00\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\uff0c\u6211\u4eec\u5728\u6267\u884c\u6df7\u5408\u68c0\u7d22\u7684\u65f6\u5019\uff0c\u4e0d\u4f46\u53ef\u4ee5\u5bf9 textContent \u505a\u5173\u952e\u8bcd\u5339\u914d\u3001\u5bf9 vector \u505a\u8bed\u4e49\u68c0\u7d22\uff0c\u540c\u65f6\u8fd8\u80fd\u5728\u67e5\u8be2\u8fc7\u6ee4\u65f6\u52a0\u5165 userId\u3001orgTag\u3001isPublic \u7b49\u6761\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5907\u6ce8\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u901a\u8fc7&nbsp;<code>curl -k -u \"\u4f60\u7684 ES \u5bc6\u7801\" -X GET \"[https:\/\/localhost:9200\/knowledge_base\/_mapping\"](https:\/\/localhost:9200\/knowledge_base\/_mapping\") | jq '.'<\/code>\u547d\u4ee4\u83b7\u53d6\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5\u4fe1\u606f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/884fbc31fd8e5aa5aee3e5242f90e9cc.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"2156\" height=\"1494\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/884fbc31fd8e5aa5aee3e5242f90e9cc.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2208\"  sizes=\"auto, (max-width: 2156px) 100vw, 2156px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6211\u7528 warp \u505a\u7684\u4e00\u4e2a\u5b8c\u6574\u5b57\u6bb5\u89e3\u91ca\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/6351a0e7a69f7c44b355dc4a793ea43e.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1828\" height=\"1568\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/6351a0e7a69f7c44b355dc4a793ea43e.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2207\"  sizes=\"auto, (max-width: 1828px) 100vw, 1828px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"dxHjs\">9.\u5047\u8bbe\u4f60\u7684\u68c0\u7d22\u63a5\u53e3\u54cd\u5e94\u5f88\u6162&#8230;\u4f60\u662f\u5982\u4f55\u4e00\u6b65\u6b65\u628a\u5b83\u4f18\u5316\u7684\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u53d1\u73b0\u641c\u7d22\u63a5\u53e3\u53d8\u6162\u7684\u65f6\u5019\uff0c\u6211\u901a\u5e38\u4f1a\u4ece\u4e09\u4e2a\u5c42\u9762\u53bb\u6392\u67e5\uff1a<strong>Elasticsearch \u672c\u8eab\u7684\u67e5\u8be2\u6548\u7387<\/strong>\u3001<strong>\u670d\u52a1\u7aef\u7684\u4ee3\u7801\u903b\u8f91<\/strong>\uff0c\u8fd8\u6709\u5c31\u662f\u80fd\u4e0d\u80fd\u52a0<strong>\u7f13\u5b58<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Elasticsearch<\/strong>&nbsp;\u662f\u5f71\u54cd\u6027\u80fd\u6700\u5173\u952e\u7684\u56e0\u7d20\u3002\u5982\u679c ES \u672c\u8eab\u67e5\u8be2\u6162\uff0c\u4e0a\u5c42\u518d\u600e\u4e48\u505a\u90fd\u6551\u4e0d\u56de\u6765\u3002\u6211\u4f1a\u5148\u770b\u770b\u7d22\u5f15\u8bbe\u8ba1\u662f\u5426\u5408\u7406\uff0c\u6bd4\u5982\u6709\u6ca1\u6709\u8bbe\u7f6e\u592a\u591a\u5b57\u6bb5\u53c2\u4e0e\u68c0\u7d22\uff1f\u6709\u6ca1\u6709\u5b57\u6bb5\u7c7b\u578b\u8bbe\u7f6e\u9519\u4e86\uff1fES \u5360\u7528\u7684\u5185\u5b58\u662f\u5426\u8db3\u591f\u7528\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u5c42\u662f<strong>\u4ee3\u7801\u903b\u8f91<\/strong>\u3002\u6211\u4f1a\u91cd\u70b9\u770b\uff1aES \u7684\u67e5\u8be2\u8bed\u53e5\u5199\u5f97\u662f\u5426\u4f18\u96c5\uff0c\u6bd4\u5982\u80fd\u4e0d\u80fd\u7528 filter \u66ff\u4ee3 query \u6765\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u76f8\u5173\u5ea6\u8ba1\u7b97\uff1f\u662f\u4e0d\u662f\u6bcf\u6b21\u90fd\u67e5\u4e86\u592a\u591a\u5b57\u6bb5\u8fd4\u56de\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u5c31\u662f<strong>\u7f13\u5b58\u8fd9\u5757<\/strong>\u3002\u6211\u4f1a\u9488\u5bf9\u4e00\u4e9b\u9ad8\u9891\u7684\u67e5\u8be2\uff0c\u5bf9 embedding \u7ed3\u679c\u505a\u4e00\u6b21\u7f13\u5b58\uff0c\u907f\u514d\u7528\u6237\u6bcf\u6b21\u67e5\u8be2\u90fd\u8981\u91cd\u65b0\u8dd1\u5411\u91cf\u6a21\u578b\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5bf9\u4e8e\u4e00\u4e9b\u70ed\u70b9\u67e5\u8be2\uff0c\u53ef\u4ee5\u628a ES \u8fd4\u56de\u7684\u7ed3\u679c\u6574\u4f53\u7f13\u5b58\u4e0b\u6765\uff0c\u8fd9\u6837\u540e\u7eed\u76f8\u540c\u7684\u67e5\u8be2\u8bf7\u6c42\u53ef\u4ee5\u76f4\u63a5\u4ece\u7f13\u5b58\u8fd4\u56de\uff0c\u5b8c\u5168\u7ed5\u8fc7 ES\uff0c\u4ece\u800c\u51cf\u8f7b ES \u7684\u8d1f\u62c5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"rImBX\">10.\u6211\u4eec\u73b0\u5728\u8fdb\u5165\u68c0\u7d22\u7684\u6838\u5fc3\u3002\u5047\u8bbe\u77e5\u8bc6\u5e93\u91cc\u6709\u6210\u5343\u4e0a\u4e07\u4efd\u6587\u6863\uff0c\u5206\u5c5e\u4e0d\u540c\u7684\u4eba\u548c\u90e8\u95e8\u3002\u5f53\u4e00\u4e2a\u7528\u6237\uff08\u6bd4\u5982\u2018\u738b\u4e8c\u2019\uff09\u53d1\u8d77\u641c\u7d22\u65f6\uff0c\u4f60\u662f\u5982\u4f55\u786e\u4fdd\u4f60\u7684\u68c0\u7d22\u903b\u8f91\uff0c\u4ece\u4e00\u5f00\u59cb\u5c31\u53ea\u5728\u4ed6\u6709\u6743\u9650\u7684\u6570\u636e\u8303\u56f4\u5185\u8fdb\u884c\u7684\uff1f\u8bf7\u8be6\u7ec6\u63cf\u8ff0\u4e00\u4e0b\u8fd9\u4e2a\u6743\u9650\u8fc7\u6ee4\u7684\u5b9e\u73b0\u673a\u5236\u3002<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u5f53\u65f6\u7684\u8bbe\u8ba1\u662f\uff0c\u67e5\u8be2\u5fc5\u987b\u5728 ES \u8fd9\u91cc\u5c31\u8fdb\u884c\u6743\u9650\u8fc7\u6ee4\uff0c\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\uff0c\u5728\u8fdb\u884c\u68c0\u7d22\u7684\u65f6\u5019\uff0c\u53ea\u62ff\u5230\u7528\u6237\u6709\u6743\u9650\u7684\u7ed3\u679c\uff0c\u76f4\u63a5\u5c31\u628a\u6ca1\u6709\u6743\u9650\u7684\u7ed3\u679c\u8fc7\u6ee4\u6389\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7528\u6237\u4e0a\u4f20\u6587\u6863\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5c31\u628a\u6743\u9650\u5199\u5230 ES \u4e2d\uff1b\u5f53\u7528\u6237\u8fdb\u884c\u67e5\u8be2\u65f6\uff0c\u6211\u4eec\u76f4\u63a5\u628a\u4ed6\u7684\u6743\u9650\u5199\u8fdb ES \u7684 filter \u5b57\u53e5\u4e2d\uff0c\u8fd9\u6837\u65e2\u4e0d\u4f1a\u5f71\u54cd\u6392\u5e8f\u76f8\u5173\u6027\u8ba1\u7b97\uff0cES \u4e5f\u80fd\u5bf9 filter \u7684\u7ed3\u679c\u505a\u7f13\u5b58\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u8bf4\u5f53\u4e00\u4e2a\u7528\u6237\uff08\u6bd4\u5982\u201c\u738b\u4e8c\u201d\uff09\u53d1\u8d77\u68c0\u7d22\u8bf7\u6c42\u65f6\uff0c\u8bf7\u6c42\u4f1a\u643a\u5e26\u4ed6\u7684\u8eab\u4efd\u8ba4\u8bc1\u4fe1\u606f\uff08\u4e5f\u5c31\u662f JWT Token\uff09\u3002\u540e\u7aef\u5728\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4f1a\u89e3\u6790\u8fd9\u4e2a Token\uff0c\u62ff\u5230\u7528\u6237\u7684 userid\uff0c\u518d\u4ece Redis \u7f13\u5b58\u4e2d\u53d6\u51fa\u7528\u6237\u7684\u7ec4\u7ec7\u6807\u7b7e\u7b49\u4fe1\u606f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u7740\uff0c\u6211\u4eec\u4f1a\u5c06\u7528\u6237\u7684\u8eab\u4efd\u4fe1\u606f\uff0c\u548c\u7ec4\u7ec7\u6807\u7b7e\u5e26\u5165\u5230 ES \u7684\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u6211\u4eec\u7684\u903b\u8f91\u662f\uff1a\u4e00\u4e2a\u6587\u6863\uff0c\u53ea\u8981\u6ee1\u8db3\u4ee5\u4e0b\u4efb\u610f\u4e00\u4e2a\u6761\u4ef6\uff0c\u5c31\u88ab\u8ba4\u4e3a\u7528\u6237\u662f\u6709\u6743\u8bbf\u95ee\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8be5\u6587\u6863\u662f\u516c\u5f00\u7684 ( isPublic: true )\u3002<\/li>\n\n\n\n<li>\u8be5\u6587\u6863\u7684\u521b\u5efa\u8005\u662f\u5f53\u524d\u7528\u6237 ( userId: &#8220;\u738b\u4e8c\u7684 userId&#8221; )\u3002<\/li>\n\n\n\n<li>\u8be5\u6587\u6863\u7684\u6743\u9650\u6807\u7b7e\uff08orgTag\uff09\u4e0e\u7528\u6237\u7684\u6743\u9650\u6807\u7b7e\u6709\u4ea4\u96c6\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5728\u67e5\u8be2\u65f6\u4f1a\u628a\u8fd9\u4e09\u4e2a\u6761\u4ef6\u90fd\u52a0\u8fdb\u53bb\uff0cES \u5c31\u4f1a\u81ea\u52a8\u8fdb\u884c\u8fc7\u6ee4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ ...\nBoolQuery.Builder permissionBoolQuery = new BoolQuery.Builder();\n\n\/\/ \u6761\u4ef61: \u516c\u5f00\u6587\u6863\npermissionBoolQuery.should(s -&gt; s.term(t -&gt; t.field(\"isPublic\").value(true)));\n\n\/\/ \u83b7\u53d6\u5f53\u524d\u7528\u6237\u4fe1\u606f\nLoginUser loginUser = UserUtils.getLoginUser();\nif (Objects.nonNull(loginUser)) {\n    \/\/ \u6761\u4ef62: \u7528\u6237\u81ea\u5df1\u7684\u6587\u6863\n    permissionBoolQuery.should(s -&gt; s.term(t -&gt; t.field(\"userId\").value(loginUser.getUserId())));\n\n    \/\/ \u6761\u4ef63: \u7528\u6237\u6240\u5728\u7ec4\u7ec7\u7684\u6587\u6863\n    if (CollectionUtils.isNotEmpty(loginUser.getOrgTags())) {\n        permissionBoolQuery.should(s -&gt; s.terms(t -&gt; t\n                .field(\"orgTag\")\n                .terms(new TermsQueryField.Builder().value(\n                        loginUser.getOrgTags().stream().map(FieldValue::of).collect(Collectors.toList())\n                ).build())\n        ));\n    }\n}\n\n\/\/ \u5c06\u6743\u9650\u8fc7\u6ee4\u6761\u4ef6\u6dfb\u52a0\u5230\u4e3b\u67e5\u8be2\u7684filter\u5b50\u53e5\u4e2d\nmainBoolQuery.filter(f -&gt; f.bool(permissionBoolQuery.build()));\n\n\/\/ ... \u7136\u540e\u5c06 mainBoolQuery \u53d1\u9001\u7ed9 Elasticsearch\nSearchResponse&lt;EsKnowledgeBase&gt; response = elasticsearchClient.search(s -&gt; s\n        .index(esConfig.getIndexName())\n        .query(q -&gt; q.bool(mainBoolQuery.build()))\n        \/\/ ... \u5176\u4ed6\u67e5\u8be2\u53c2\u6570\uff0c\u5982knn, rescore, size\u7b49\n, EsKnowledgeBase.class);\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"yDt3D\">11.\u4e3a\u4ec0\u4e48\u5148\u7528ES\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u7528FAISS\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e4b\u6240\u4ee5\u9009\u62e9\u4f7f\u7528 Elasticsearch\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u7528 FAISS\uff0c\u6211\u4e5f\u601d\u8003\u4e86\u5f88\u591a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u6211\u5bf9 Elasticsearch \u6bd4\u8f83\u719f\u6089\u3002\u50cf\u6d3e\u806a\u660e\u8fd9\u79cd\u4f01\u4e1a\u7ea7\u7684 RAG \u5e94\u7528\uff0c\u9664\u4e86\u5411\u91cf\u53ec\u56de\u4ee5\u5916\uff0c\u8fd8\u4f1a\u6d89\u53ca\u5173\u952e\u8bcd\u5339\u914d\u3001\u6743\u9650\u8fc7\u6ee4\u7b49\uff0c\u8fd9\u4e9b\u7528 ES \u90fd\u80fd\u4e00\u7ad9\u5f0f\u89e3\u51b3\u3002\u6bd4\u5982\u6211\u4eec\u7528 dense_vector \u5b57\u6bb5\u914d\u5408 HNSW \u505a\u8bed\u4e49\u68c0\u7d22\uff1b\u5173\u952e\u8bcd\u68c0\u7d22\u90e8\u5206\u7528\u7684\u662f BM25\uff1b\u800c\u50cf\u6743\u9650\u63a7\u5236\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5728 ES \u67e5\u8be2\u4e2d\u7528 filter \u8bed\u6cd5\uff0c\u5bf9 userId\u3001orgTag\u3001isPublic \u7b49\u5b57\u6bb5\u505a\u524d\u7f6e\u8fc7\u6ee4\uff0c\u4e0d\u9700\u8981\u62c9\u6570\u636e\u56de\u6765\u518d\u7528 Java \u4ee3\u7801\u505a\u540e\u7f6e\u5904\u7406\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/aad302d648f9e1b418358a4b6f2748fb.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"900\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/aad302d648f9e1b418358a4b6f2748fb.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2206\"  sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u5916\uff0c\u4ece\u8fd0\u7ef4\u548c\u7814\u53d1\u6210\u672c\u4e0a\u770b\uff0cElasticsearch \u751f\u6001\u975e\u5e38\u6210\u719f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0cFAISS \u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u975e\u5e38\u4f18\u79c0\u7684\u5411\u91cf\u641c\u7d22\u5f15\u64ce\uff0c\u5b83\u7684\u7b97\u6cd5\u6027\u80fd\u548c\u5185\u5b58\u6548\u7387\u90fd\u975e\u5e38\u5f3a\u3002\u4e0b\u4e00\u4e2a\u7248\u672c\u6211\u662f\u6253\u7b97\u7528 FAISS \u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"NIWE4\">12.\u4f60\u7684ES\u7d22\u5f15\u662f\u5982\u4f55\u5904\u7406\u9ad8\u7ef4\u5411\u91cf\u7684\uff1f\u6709\u54ea\u4e9b\u7279\u6b8a\u7684\u914d\u7f6e\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u662f\u5411\u91cf\u5b57\u6bb5 vector \u7684\u5b9a\u4e49\uff0c\u5b83\u7684\u7c7b\u578b\u4e3a dense_vector\uff0c\u660e\u786e\u544a\u8bc9 Elasticsearch\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u662f\u7528\u6765\u5b58\u50a8<strong>\u5bc6\u96c6\u5411\u91cf\u7684\u3002<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/13d25127b0cb268936b595c8bf272231.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"812\" height=\"431\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/13d25127b0cb268936b595c8bf272231.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2200\"  sizes=\"auto, (max-width: 812px) 100vw, 812px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4f7f\u7528 Elasticsearch kNN \u641c\u7d22\u7684\u57fa\u7840\uff0c\u53ea\u6709\u5b9a\u4e49\u4e3a dense_vector \u7684\u5b57\u6bb5\u624d\u80fd\u7528\u4e8e\u540e\u7eed\u7684 knn \u67e5\u8be2\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"vector\": {\n          \"type\": \"dense_vector\",\n          \"dims\": 2048,\n          \"index\": true,\n          \"similarity\": \"cosine\"\n        }\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ef4\u5ea6\u548c\u6211\u4eec\u4f7f\u7528\u7684\u8c46\u5305 embedding \u6a21\u578b\u5bf9\u9f50\uff0c\u90fd\u662f 2048 \u7ef4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b58\u50a8\u5355\u4e2a\u5411\u91cf\u6240\u9700\u7684\u7a7a\u95f4\u8d8a\u5927\uff082048 \u4e2a float \u2248 2048 \u00d7 4 bytes = 8KB\uff09\uff0c\u6784\u5efa\u7d22\u5f15\u548c\u8fdb\u884c kNN \u641c\u7d22\u7684\u8ba1\u7b97\u5f00\u9500\u901a\u5e38\u4e5f\u8d8a\u5927\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\uff0c\u6211\u4eec\u4f1a\u8bbe\u7f6e index \u7b49\u4e8e true\uff0c\u8981\u6c42 Elasticsearch \u4e3a\u8fd9\u4e2a\u5411\u91cf\u5b57\u6bb5\u6784\u5efa\u4e13\u95e8\u7684 \u8fd1\u4f3c\u6700\u8fd1\u90bb\uff08ANN\uff09\u7d22\u5f15\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u5305\u542b\u6d77\u91cf\u6587\u6863\u7684\u7d22\u5f15\uff0c\u8fdb\u884c\u7cbe\u786e\u7684 kNN \u641c\u7d22\u662f\u4e0d\u592a\u53ef\u884c\u7684\uff08\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(N)\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6784\u5efa ANN \u7d22\u5f15\u662f\u4e3a\u4e86\u5b9e\u73b0 \u4e9a\u7ebf\u6027\u65f6\u95f4 \u7684\u641c\u7d22\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u80cc\u540e\u7528\u5230\u7684\u662f HNSW \u7b97\u6cd5\uff0c\u8be5\u7b97\u6cd5\u4f1a\u6784\u5efa\u4e00\u4e2a\u591a\u5c42\u56fe\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/c87bff74b69954dc4faf053f7733c757.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1040\" data-original=\"https:\/\/zero-zl.cn\/wp-content\/uploads\/2025\/10\/c87bff74b69954dc4faf053f7733c757.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2205\"  sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/div><\/figure>\n\n\n\n<p 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