{"id":1657,"date":"2026-10-11T09:19:15","date_gmt":"2026-10-11T01:19:15","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1657"},"modified":"2026-10-10T09:23:42","modified_gmt":"2026-10-10T01:23:42","slug":"%e3%80%90ai%e3%80%91embedding-%e4%b8%8e%e6%b7%b7%e5%90%88%e6%a3%80%e7%b4%a2%ef%bc%9arag-%e7%9a%84%e8%af%ad%e4%b9%89%e6%a3%80%e7%b4%a2%e9%93%be%e8%b7%af","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1657","title":{"rendered":"\u3010AI\u3011Embedding \u4e0e\u6df7\u5408\u68c0\u7d22\uff1aRAG \u7684\u8bed\u4e49\u68c0\u7d22\u94fe\u8def"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u4e00\u3001\u5f00\u7bc7\uff1aRAG \u68c0\u7d22\u94fe\u8def\u662f\u4ec0\u4e48<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u68c0\u7d22\u589e\u5f3a\u751f\u6210\uff08RAG\uff09\u8981\u8ba9\u5927\u6a21\u578b\u56de\u7b54\u524d\uff0c\u5148\u4ece\u8d44\u6599\u5e93\u4e2d\u627e\u5230\u76f8\u5173\u5185\u5bb9\u3002\u8fd9\u6761\u94fe\u8def\u7684\u57fa\u77f3\u662f <strong>Embedding \u5411\u91cf<\/strong>\u4e0e <strong>\u5411\u91cf\u68c0\u7d22<\/strong>\uff0c\u518d\u914d\u5408\u5173\u952e\u8bcd\u68c0\u7d22\u4e0e\u878d\u5408\u6392\u5e8f\uff0c\u6784\u6210\u5b8c\u6574\u7684\u53ec\u56de\u94fe\u8def\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e8c\u3001Embedding\uff08\u5d4c\u5165\uff09<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 \u4ec0\u4e48\u662f Embedding<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Embedding\uff08\u5d4c\u5165\uff09\u628a\u4eba\u7c7b\u53ef\u8bfb\u7684\u6587\u672c\u3001\u8bcd\u8bed\uff0c\u901a\u8fc7 Embedding \u6a21\u578b\u6620\u5c04\u6210\u4e00\u4e32\u56fa\u5b9a\u7ef4\u5ea6\u7684\u6d6e\u70b9\u6570\u5411\u91cf\u3002<\/strong>\u6587\u672c\u662f\u4eba\u7406\u89e3\u7684\uff1b\u5411\u91cf\u662f\u8ba1\u7b97\u673a\u53ef\u4ee5\u505a\u6570\u5b66\u8ba1\u7b97\u7684\u8868\u8fbe\u3002\u4f8b\u5982\u4e00\u53e5\u8bdd\u8f93\u51fa 1024 \u7ef4\u5411\u91cf\uff0c\u5c31\u662f 1024 \u4e2a\u5c0f\u6570\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 \u6587\u672c\u600e\u4e48\u53d8\u6210\u56fa\u5b9a\u7ef4\u5ea6\u5411\u91cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d41\u7a0b\u4e3a\uff1a\u8f93\u5165\u6587\u672c\u7ecf\u8fc7\u5206\u8bcd\uff0c\u8f6c\u4e3a\u6a21\u578b\u8ba4\u8bc6\u7684 token \u5e8f\u5217 \u2192 \u9001\u5165\u9884\u8bad\u7ec3\u597d\u7684 Embedding \u6a21\u578b \u2192 \u6a21\u578b\u7ecf\u8fc7\u591a\u5c42\u795e\u7ecf\u7f51\u7edc\u8ba1\u7b97\uff0c\u5bf9\u6574\u6bb5\u6587\u672c\u505a\u805a\u5408\uff08\u6c60\u5316\uff09\u2192 \u8f93\u51fa\u56fa\u5b9a\u957f\u5ea6\u7684\u6d6e\u70b9\u6570\u5411\u91cf\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5173\u952e\u70b9\uff1a\u4e0d\u7ba1\u8f93\u5165\u662f 5 \u4e2a\u5b57\u8fd8\u662f\u4e00\u5927\u6bb5\u6587\u5b57\uff0c\u8f93\u51fa\u5411\u91cf\u7ef4\u5ea6\u4e0d\u53d8\uff08\u4f8b\u5982 768\u30011024 \u7ef4\uff09\u3002<\/strong>\u957f\u6587\u672c\u4e0d\u662f\u5411\u91cf\u53d8\u957f\uff0c\u800c\u662f\u5185\u90e8\u505a\u805a\u5408\u538b\u7f29\u4fe1\u606f\u5230\u56fa\u5b9a\u7ef4\u5ea6\u7a7a\u95f4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.3 \u4e3a\u4ec0\u4e48\u8bed\u4e49\u76f8\u4f3c\u7684\u6587\u672c\uff0c\u5411\u91cf\u7a7a\u95f4\u8ddd\u79bb\u66f4\u8fd1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u6e90\u6765\u81ea Embedding \u6a21\u578b\u7684\u8bad\u7ec3\u76ee\u6807\u3002\u8bad\u7ec3\u65f6\u6784\u9020<strong>\u6b63\u6837\u672c<\/strong>\uff08\u8bed\u4e49\u76f8\u8fd1\u7684\u53e5\u5b50\uff09\u4e0e<strong>\u8d1f\u6837\u672c<\/strong>\uff08\u8bed\u4e49\u65e0\u5173\u7684\u53e5\u5b50\uff09\uff0c\u635f\u5931\u51fd\u6570\u7ea6\u675f\u8bed\u4e49\u76f8\u8fd1\u2192\u5411\u91cf\u8ddd\u79bb\u5c3d\u91cf\u5c0f\u3001\u8bed\u4e49\u5dee\u522b\u5927\u2192\u5411\u91cf\u8ddd\u79bb\u5c3d\u91cf\u62c9\u5927\u3002\u6a21\u578b\u5728\u6d77\u91cf\u6587\u672c\u4e0a\u5b66\u4e60\u8bcd\u8bed\u3001\u53e5\u5b50\u4e4b\u95f4\u7684\u8bed\u4e49\u5173\u8054\uff0c\u628a\u8bed\u4e49\u5173\u7cfb\u7f16\u7801\u5230\u5411\u91cf\u6bcf\u4e00\u7ef4\u6570\u503c\u91cc\u9762\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bad\u7ec3\u6536\u655b\u540e\u5373\u5f62\u6210\u8be5\u7279\u6027\uff1a<code>\u201c\u732b\u559c\u6b22\u5403\u9c7c\u201d<\/code> \u4e0e <code>\u201c\u732b\u54aa\u7231\u5403\u9c7c\u201d<\/code> \u8bed\u4e49\u63a5\u8fd1\uff0c\u5411\u91cf\u8ddd\u79bb\u5f88\u5c0f\uff1b<code>\u201c\u732b\u559c\u6b22\u5403\u9c7c\u201d<\/code> \u4e0e <code>\u201c\u6c7d\u8f66\u8dd1\u5728\u9a6c\u8def\u4e0a\u201d<\/code> \u8bed\u4e49\u65e0\u5173\uff0c\u5411\u91cf\u8ddd\u79bb\u5f88\u5927\u3002\u5411\u91cf\u6bcf\u4e00\u7ef4\u6570\u5b57\u6ca1\u6709\u5355\u72ec\u7684\u4eba\u7c7b\u53ef\u8bfb\u542b\u4e49\uff0c\u662f\u6574\u4f53\u7a7a\u95f4\u4f53\u73b0\u8bed\u4e49\u76f8\u4f3c\u5ea6\uff0c<strong>\u5e38\u7528\u4f59\u5f26\u76f8\u4f3c\u5ea6<\/strong>\u8861\u91cf\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"821\" height=\"733\" src=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-9.png\" alt=\"\" class=\"wp-image-1658\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-9.png 821w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-9-300x268.png 300w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-9-767x685.png 767w\" sizes=\"(max-width: 821px) 100vw, 821px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2.4 Embedding \u5728 RAG \u4e2d\u7684\u4f5c\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u6863\u5207\u7247\u5168\u90e8\u8f6c\u4e3a embedding \u5411\u91cf\u5b58\u5165\u5411\u91cf\u5e93\uff1b\u7528\u6237 query \u4e5f\u8f6c\u6210\u540c\u7ef4\u5ea6\u5411\u91cf\uff1b\u505a\u5411\u91cf\u76f8\u4f3c\u5ea6\u68c0\u7d22\uff0c\u53ec\u56de\u8bed\u4e49\u5339\u914d\u7684\u6587\u6863\u7247\u6bb5\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.5 \u5c40\u9650\uff08\u9762\u8bd5\u52a0\u5206\uff09<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bed\u4e49\u76f8\u8fd1\u4e0d\u7b49\u4e8e\u5b57\u9762\u5173\u952e\u8bcd\u76f8\u540c\uff1a\u4f1a\u51fa\u73b0\u8bed\u4e49\u76f8\u4f3c\u4f46\u5173\u952e\u8bcd\u5b8c\u5168\u4e0d\u4e00\u6837\u7684\u53ec\u56de\uff0c\u4e5f\u4f1a\u51fa\u73b0\u5b57\u9762\u76f8\u8fd1\u8bed\u4e49\u4e0d\u4e00\u6837\u7684\u60c5\u51b5\u3002<\/li>\n\n\n\n<li>\u5bf9\u6b67\u4e49\u3001\u591a\u4e49\u8bcd\u5904\u7406\u6709\u9650\u3002<\/li>\n\n\n\n<li>embedding \u8d28\u91cf\u9ad8\u5ea6\u4f9d\u8d56\u8bad\u7ec3\u6570\u636e\u548c\u6a21\u578b\u672c\u8eab\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e09\u3001\u5411\u91cf\u68c0\u7d22\u3001ANN\u3001HNSW<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">3.1 \u5411\u91cf\u68c0\u7d22\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">RAG \u4e2d\uff0c\u6587\u6863\u5207\u7247\u548c\u7528\u6237 Query \u90fd\u88ab\u8f6c\u4e3a\u56fa\u5b9a\u7ef4\u5ea6 Embedding \u5411\u91cf\u3002<strong>\u5411\u91cf\u68c0\u7d22\uff1a\u7ed9\u5b9a\u67e5\u8be2\u5411\u91cf\uff0c\u5728\u6d77\u91cf\u5411\u91cf\u5e93\u4e2d\uff0c\u627e\u51fa\u548c\u5b83\u76f8\u4f3c\u5ea6\u6700\u9ad8\uff08\u8ddd\u79bb\u6700\u8fd1\uff09\u7684 Top-N \u5411\u91cf\uff0c\u62ff\u5230\u5bf9\u5e94\u7684\u539f\u59cb\u6587\u672c\u3002<\/strong>\u76f8\u4f3c\u5ea6\u5e38\u7528\u4f59\u5f26\u76f8\u4f3c\u5ea6\uff0c\u8ddd\u79bb\u5e38\u7528\u6b27\u5f0f\u8ddd\u79bb\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.2 \u66b4\u529b\u68c0\u7d22\uff08\u7cbe\u786e KNN\uff09\u7684\u95ee\u9898<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u904d\u5386\u5e93\u91cc\u5168\u90e8\u5411\u91cf\uff0c\u9010\u4e2a\u8ba1\u7b97\u548c\u67e5\u8be2\u5411\u91cf\u7684\u8ddd\u79bb\uff0c\u6392\u5e8f\u53d6 TopN\u3002<strong>\u7ed3\u679c 100% \u51c6\u786e\uff0c\u4f46\u6570\u636e\u91cf\u5927\u65f6\u901f\u5ea6\u6781\u6162\uff0c\u5411\u91cf\u767e\u4e07\u3001\u5343\u4e07\u7ea7\u522b\u5b8c\u5168\u4e0d\u53ef\u7528\u3002<\/strong>\u6240\u4ee5\u751f\u4ea7\u73af\u5883\u4e0d\u7528 KNN\uff0c\u7528 ANN \u8fd1\u4f3c\u6700\u8fd1\u90bb\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.3 ANN \u8fd1\u4f3c\u6700\u8fd1\u90bb\u7b97\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ANN \u5168\u79f0 Approximate Nearest Neighbor\uff0c\u6838\u5fc3\u601d\u60f3\u662f<strong>\u727a\u7272\u4e00\u5c0f\u90e8\u5206\u53ec\u56de\u51c6\u786e\u7387\uff0c\u6362\u53d6\u5de8\u5927\u7684\u68c0\u7d22\u901f\u5ea6\u63d0\u5347<\/strong>\u3002\u4e0d\u904d\u5386\u5168\u90e8\u6570\u636e\uff0c\u53ea\u641c\u7d22\u4e00\u90e8\u5206\u5019\u9009\uff0c\u8fd4\u56de\u8fd1\u4f3c\u6700\u76f8\u4f3c\u7ed3\u679c\uff0c\u4e0d\u9700\u8981\u7edd\u5bf9\u5168\u5c40\u6700\u63a5\u8fd1\uff0c\u4e1a\u52a1\u4e0a\u591f\u7528\u5373\u53ef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u6d41 ANN \u5b9e\u73b0\u5305\u62ec HNSW\u3001IVF-FLAT\u3001FAISS-IVF\u3001PQ \u4e58\u79ef\u91cf\u5316\u7b49\uff0c<strong>\u5de5\u4e1a\u5411\u91cf\u6570\u636e\u5e93\u6700\u5e38\u7528 HNSW<\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.4 HNSW \u7d22\u5f15\u57fa\u672c\u601d\u60f3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HNSW\uff08Hierarchical Navigable Small-World\uff0c\u5206\u5c42\u53ef\u5bfc\u822a\u5c0f\u4e16\u754c\u56fe\uff09\u6838\u5fc3\u662f\u5206\u5c42\u56fe\u7ed3\u6784\uff0c\u7528\u591a\u5c42\u6709\u5411\u56fe\u52a0\u901f\u5411\u91cf\u67e5\u627e\u3002<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u591a\u5c42\u56fe\u7ed3\u6784<\/strong>\uff1a\u6700\u4e0a\u5c42\u8282\u70b9\u6570\u91cf\u5f88\u5c11\u3001\u7a00\u758f\u3001\u4ee3\u8868\u7c97\u7c92\u5ea6\uff1b\u5f80\u4e0b\u6bcf\u4e00\u5c42\u8282\u70b9\u8d8a\u6765\u8d8a\u591a\u3001\u56fe\u8d8a\u6765\u8d8a\u7a20\u5bc6\uff1b\u6700\u5e95\u5c42\u5b58\u653e\u5168\u90e8\u5411\u91cf\uff0c\u662f\u5b8c\u6574\u7684\u5c0f\u4e16\u754c\u56fe\u3002<\/li>\n\n\n\n<li><strong>\u68c0\u7d22\u6d41\u7a0b<\/strong>\uff1a\u4ece\u6700\u9876\u5c42\u968f\u673a\u8282\u70b9\u5f00\u59cb \u2192 \u5f53\u524d\u5c42\u4e0d\u65ad\u627e\u6bd4\u5f53\u524d\u8282\u70b9\u66f4\u8fd1\u7684\u90bb\u5c45\u8d2a\u5fc3\u524d\u8fdb\uff0c\u627e\u4e0d\u5230\u66f4\u8fd1\u5c31\u505c\u6b62 \u2192 \u4e0b\u964d\u5230\u4e0b\u4e00\u5c42\uff0c\u4ee5\u4e0a\u5c42\u505c\u70b9\u505a\u8d77\u70b9\u7ee7\u7eed \u2192 \u9010\u5c42\u5411\u4e0b\u5230\u5e95\u5c42 \u2192 \u5e95\u5c42\u6536\u96c6\u5019\u9009\u70b9\uff0c\u6392\u5e8f\u8f93\u51fa Top-N\u3002<\/li>\n\n\n\n<li><strong>\u4e0a\u5c42\u4f5c\u7528<\/strong>\uff1a\u5feb\u901f\u8df3\u5230\u76ee\u6807\u5411\u91cf\u5927\u81f4\u6240\u5728\u533a\u57df\uff08\u7c97\u5b9a\u4f4d\uff09\uff1b\u5e95\u5c42\u518d\u505a\u7cbe\u7ec6\u67e5\u627e\uff0c\u7c7b\u4f3c\u5750\u98de\u673a\u5148\u5230\u76ee\u6807\u57ce\u5e02\uff0c\u518d\u6253\u8f66\u5230\u5177\u4f53\u8857\u9053\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HNSW \u7279\u70b9<\/strong>\uff1a\u67e5\u8be2\u5feb\u3001\u53ec\u56de\u597d\u3001\u63d2\u5165\u53cb\u597d\uff0c\u4f46\u5185\u5b58\u5f00\u9500\u504f\u5927\u3002\u53c2\u6570 ef_construction\u3001ef_search \u5f71\u54cd\u6784\u5efa\u901f\u5ea6\u3001\u68c0\u7d22\u901f\u5ea6\u548c\u53ec\u56de\u7387\u2014\u2014<strong>ef_search \u8d8a\u5927\uff0c\u63a2\u7d22\u90bb\u5c45\u8d8a\u591a\uff0c\u53ec\u56de\u8d8a\u9ad8\u3001\u901f\u5ea6\u8d8a\u6162<\/strong>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"860\" height=\"678\" src=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-10.png\" alt=\"\" class=\"wp-image-1659\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-10.png 860w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-10-300x237.png 300w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-10-767x605.png 767w\" sizes=\"(max-width: 860px) 100vw, 860px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">3.5 KNN \/ ANN \/ HNSW \u4e09\u8005\u5173\u7cfb<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>KNN<\/strong>\uff1a\u66b4\u529b\u7cbe\u786e\u641c\u7d22\uff0c\u5168\u91cf\u904d\u5386\uff0c\u6162\u3001\u51c6\u3002<\/li>\n\n\n\n<li><strong>ANN<\/strong>\uff1a\u4e00\u7c7b\u7b97\u6cd5\u603b\u79f0\uff0c\u8fd1\u4f3c\u641c\u7d22\uff0c\u4ee5\u7cbe\u5ea6\u6362\u901f\u5ea6\u3002<\/li>\n\n\n\n<li><strong>HNSW<\/strong>\uff1aANN \u91cc\u7684\u4e00\u79cd\u5177\u4f53\u5b9e\u73b0\uff0c\u5206\u5c42\u56fe\u7d22\u5f15\uff0c\u5411\u91cf\u6570\u636e\u5e93\u4e3b\u6d41\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">\u56db\u3001\u6df7\u5408\u68c0\u7d22\uff08\u5411\u91cf\u68c0\u7d22 + BM25\uff09<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">4.1 \u7eaf\u5411\u91cf\u68c0\u7d22\u7684\u95ee\u9898<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5411\u91cf\u68c0\u7d22\u4f9d\u9760\u8bed\u4e49\u76f8\u4f3c\u5ea6\u5339\u914d\uff0c\u80fd\u627e\u5230\u8bed\u4e49\u76f8\u8fd1\u4f46\u5b57\u9762\u7528\u8bcd\u4e0d\u540c\u7684\u5185\u5bb9\uff0c\u4f46\u5b58\u5728\u660e\u663e\u77ed\u677f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5173\u952e\u8bcd\u5b8c\u5168\u5339\u914d\u4e5f\u4f1a\u6f0f\u53ec\u56de<\/strong>\uff1a\u4e13\u6709\u540d\u8bcd\u3001\u7f16\u53f7\u3001\u4eba\u540d\u3001\u8bbe\u5907\u578b\u53f7\u3001\u6587\u6863 ID \u7b49\u8981\u6c42\u5b57\u9762\u4e25\u683c\u547d\u4e2d\u3002\u5411\u91cf\u770b\u6574\u4f53\u8bed\u4e49\uff0c\u5373\u4fbf\u5173\u952e\u8bcd\u5b8c\u5168\u4e00\u81f4\uff0c\u82e5\u4e0a\u4e0b\u6587\u8bed\u4e49\u4e0d\u5f3a\uff0c\u5411\u91cf\u76f8\u4f3c\u5ea6\u4e0d\u4e00\u5b9a\u9ad8\uff0c\u4f1a\u6f0f\u6389\u5b57\u9762\u5b8c\u5168\u5339\u914d\u7684\u6587\u6863\u3002\u793a\u4f8b\uff1a\u641c\u201c\u8ba2\u5355\u53f7 A123456\u201d\uff0c\u6587\u6863\u91cc\u6b63\u597d\u6709\u8be5\u8ba2\u5355\u53f7\uff0c\u4f46\u5411\u91cf\u6a21\u578b\u770b\u6574\u4f53\u4e0a\u4e0b\u6587\u4e0e query \u8bed\u4e49\u76f8\u4f3c\u5ea6\u4e0d\u9ad8\uff0c\u5c31\u53ec\u56de\u4e0d\u5230\u3002<\/li>\n\n\n\n<li><strong>\u5bb9\u6613\u51fa\u73b0\u201c\u8bed\u4e49\u76f8\u4f3c\u4f46\u4e8b\u5b9e\u65e0\u5173\u201d\u7684\u7ed3\u679c<\/strong>\uff1a\u8bed\u4e49\u4e0a\u63a5\u8fd1\uff0c\u4f46\u4e0d\u5305\u542b\u7528\u6237\u8981\u7684\u4e13\u6709\u5b9e\u4f53\uff0c\u4ea7\u751f\u566a\u58f0\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u7ed3\uff1a\u5411\u91cf\u68c0\u7d22\u64c5\u957f\u8bed\u4e49\u76f8\u4f3c\uff0c\u4e0d\u64c5\u957f\u7cbe\u786e\u5b9e\u4f53\u3001\u4e13\u6709\u540d\u8bcd\u3001\u5173\u952e\u8bcd\u5b57\u9762\u547d\u4e2d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.2 BM25 \u5173\u952e\u8bcd\u68c0\u7d22\u662f\u4ec0\u4e48<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BM25 \u662f\u7ecf\u5178\u5173\u952e\u8bcd\u68c0\u7d22\u7b97\u6cd5\uff0c\u57fa\u4e8e\u8bcd\u9891\u3001\u9006\u6587\u6863\u9891\u7387\u6253\u5206<\/strong>\uff0c\u770b\u91cd\u8bcd\u662f\u5426\u51fa\u73b0\u3001\u51fa\u73b0\u6b21\u6570\u3001\u91cd\u8981\u7a0b\u5ea6\uff0c\u53ea\u505a\u5b57\u9762\u5173\u952e\u8bcd\u5339\u914d\uff0c\u4e0d\u7406\u89e3\u8bed\u4e49\u3002<strong>\u4f18\u70b9<\/strong>\uff1a\u4e13\u6709\u540d\u8bcd\u3001\u7f16\u53f7\u3001ID\u3001\u5173\u952e\u8bcd\u7cbe\u51c6\u547d\u4e2d\uff1b<strong>\u7f3a\u70b9<\/strong>\uff1a\u4e0d\u7406\u89e3\u540c\u4e49\u3001\u8f6c\u8ff0\uff0c\u6362\u4e2a\u8bf4\u6cd5\u5c31\u641c\u4e0d\u5230\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.3 \u4e3a\u4ec0\u4e48\u505a\u6df7\u5408\u68c0\u7d22\uff08Hybrid Search\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5411\u91cf\u68c0\u7d22\u8d1f\u8d23\u8bed\u4e49\uff0cBM25 \u5173\u952e\u8bcd\u68c0\u7d22\u8d1f\u8d23\u5b57\u9762\u5b9e\u4f53\uff0c\u4e24\u8005\u4e92\u8865\u3002<\/strong>\u6d41\u7a0b\uff1a\u7528\u6237 query \u540c\u65f6\u8d70\u4e24\u8def\u68c0\u7d22 \u2192 \u5411\u91cf\u68c0\u7d22\u53ec\u56de\u8bed\u4e49\u76f8\u4f3c\u5019\u9009\u3001BM25 \u53ec\u56de\u5173\u952e\u8bcd\u5b57\u9762\u5339\u914d\u5019\u9009 \u2192 \u5c06\u4e24\u8def\u7ed3\u679c\u878d\u5408\uff08\u52a0\u6743\u6253\u5206\u3001RRF \u5012\u6570\u6392\u540d\u878d\u5408\u662f\u5e38\u7528\u65b9\u5f0f\uff09\uff0c\u5408\u5e76\u91cd\u6392\u5f97\u5230\u5019\u9009\u96c6\u5408 \u2192 \u518d\u9001\u5165 Rerank \u91cd\u6392\u5e8f\u6a21\u578b\u505a\u4e8c\u6b21\u8fc7\u6ee4\u63d0\u7eaf\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u89e3\u51b3\u4e24\u7c7b\u95ee\u9898\uff1a\u5f25\u8865\u7eaf\u5411\u91cf\u68c0\u7d22\u6f0f\u6389\u4e13\u6709\u540d\u8bcd\u3001\u7f16\u53f7\u3001\u5173\u952e\u8bcd\u5b8c\u5168\u5339\u914d\u7684\u6587\u6863\uff1b\u5f25\u8865\u7eaf\u5173\u952e\u8bcd\u68c0\u7d22\u65e0\u6cd5\u8bc6\u522b\u540c\u4e49\u8f6c\u8ff0\u7684\u7f3a\u9677\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"825\" height=\"778\" src=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-11.png\" alt=\"\" class=\"wp-image-1660\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-11.png 825w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-11-300x283.png 300w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-11-768x724.png 768w\" sizes=\"(max-width: 825px) 100vw, 825px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4.4 \u5c40\u9650<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6df7\u5408\u68c0\u7d22\u53ea\u662f\u63d0\u5347\u53ec\u56de\u8d28\u91cf\uff0c\u4e0d\u80fd\u4fdd\u8bc1\u7ed3\u679c\u4e00\u5b9a\u6b63\u786e\uff0c\u4f9d\u7136\u4f9d\u8d56\u540e\u7eed Rerank \u505a\u7b5b\u9009\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e94\u3001RRF \u5012\u6570\u6392\u540d\u878d\u5408<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">5.1 \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u628a\u4e24\u8def\u5206\u6570\u76f8\u52a0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5411\u91cf\u68c0\u7d22\u8fd4\u56de\u4f59\u5f26\u76f8\u4f3c\u5ea6\/\u8ddd\u79bb\uff0c\u503c\u57df\u4e0e\u5206\u5e03\u7531 Embedding \u6a21\u578b\u51b3\u5b9a\uff1bBM25 \u8fd4\u56de\u6253\u5206\uff0c\u503c\u57df\u4e0e\u5206\u5e03\u7531\u8bcd\u9891\u7edf\u8ba1\u51b3\u5b9a\u3002<strong>\u4e24\u8005\u5206\u6570\u4e0d\u5728\u540c\u4e00\u4e2a\u91cf\u7eb2\uff0c\u542b\u4e49\u5b8c\u5168\u4e0d\u4e00\u6837\uff0c\u4e0d\u80fd\u76f4\u63a5\u76f8\u52a0\u6392\u5e8f\uff0c\u76f4\u63a5\u76f8\u52a0\u4f1a\u5bfc\u81f4\u67d0\u4e00\u8def\u7ed3\u679c\u6743\u91cd\u88ab\u4e0d\u5408\u7406\u653e\u5927\u3002<\/strong>\u4e8e\u662f\u7528\u5230 RRF \u5012\u6570\u6392\u540d\u878d\u5408\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5.2 RRF \u6838\u5fc3\u601d\u60f3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u629b\u5f03\u539f\u59cb\u5206\u6570\uff0c\u53ea\u4f7f\u7528\u6bcf\u6761\u6587\u6863\u5728\u5404\u8def\u8fd4\u56de\u7ed3\u679c\u91cc\u7684\u6392\u540d\u4f4d\u7f6e\u6765\u8ba1\u7b97\u878d\u5408\u5206\u6570\u3002<\/strong>\u516c\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">RRFScore(d) = \u03a3 1 \/ (rank(d) + k)<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>rank(d)\uff1a\u6587\u6863 d \u5728\u67d0\u4e00\u8def\u68c0\u7d22\u7ed3\u679c\u4e2d\u7684\u6392\u540d\uff0c\u4ece 1 \u5f00\u59cb\uff1b\u6ca1\u6709\u51fa\u73b0\u5728\u8be5\u8def\u7ed3\u679c\u91cc\u5219\u4e0d\u8ba1\u5165\u3002<\/li>\n\n\n\n<li>k\uff1a\u5e73\u6ed1\u5e38\u6570\uff0c\u901a\u5e38\u53d6 60\uff08\u5de5\u4e1a\u5e38\u7528\u9ed8\u8ba4\u503c\uff09\uff0c\u964d\u4f4e\u6392\u540d\u9760\u524d\u548c\u9760\u540e\u7684\u5dee\u8ddd\uff0c\u907f\u514d\u7b2c\u4e00\u540d\u6743\u91cd\u8fc7\u5927\u3002<\/li>\n\n\n\n<li>\u6587\u6863\u51fa\u73b0\u5728\u51e0\u8def\uff0c\u5c31\u7d2f\u52a0\u51e0\u8def\u7684\u5f97\u5206\uff0c\u6700\u540e\u6309 RRFScore \u4ece\u9ad8\u5230\u4f4e\u91cd\u65b0\u6392\u5e8f\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\uff1a\u6587\u6863 A \u5411\u91cf\u7b2c 1\u3001BM25 \u7b2c 10\uff08\u5f97\u5206 1\/61 + 1\/70\uff09\uff1b\u6587\u6863 B \u5411\u91cf\u7b2c 3\u3001BM25 \u7b2c 2\uff08\u5f97\u5206 1\/63 + 1\/62\uff09\u3002\u4e24\u8def\u90fd\u9760\u524d\u7684\u6587\u6863\u7d2f\u52a0\u5f97\u5206\u66f4\u9ad8\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"840\" height=\"688\" src=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-12.png\" alt=\"\" class=\"wp-image-1661\" srcset=\"https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-12.png 840w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-12-300x246.png 300w, https:\/\/yunyanglib.cn\/wp-content\/uploads\/2026\/10\/image-12-768x629.png 768w\" sizes=\"(max-width: 840px) 100vw, 840px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">5.3 RRF \u7684\u4f18\u70b9\u4e0e\u7f3a\u70b9<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4f18\u70b9<\/strong>\uff1a\u4e0d\u9700\u8981\u5f52\u4e00\u5316\u5404\u8def\u539f\u59cb\u5206\u6570\uff0c\u4e0d\u5173\u5fc3\u91cf\u7eb2\u5dee\u5f02\uff1b\u5b9e\u73b0\u7b80\u5355\u3001\u6548\u679c\u7a33\u5b9a\uff0cRAG \u6df7\u5408\u68c0\u7d22\u5de5\u4e1a\u6700\u5e38\u7528\uff1b\u5929\u7136\u652f\u6301 2 \u8def\u30013 \u8def\u591a\u8def\u878d\u5408\u3002<\/li>\n\n\n\n<li><strong>\u7f3a\u70b9<\/strong>\uff1a\u53ea\u770b\u6392\u540d\uff0c\u4e22\u5931\u539f\u59cb\u76f8\u4f3c\u5ea6\u4fe1\u606f\uff1b\u5bf9\u5404\u8def\u53ec\u56de\u5019\u9009\u6761\u6570\u654f\u611f\uff0c\u5404\u8def\u53ec\u56de\u592a\u5c11\u4f1a\u5f71\u54cd\u878d\u5408\u8d28\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">5.4 \u5b8c\u6574\u94fe\u8def\u4f4d\u7f6e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">query \u2192 \u5411\u91cf\u68c0\u7d22 + BM25 \u68c0\u7d22 \u2192 \u4e24\u8def\u5019\u9009 \u2192 RRF \u878d\u5408\u5f97\u5230\u7edf\u4e00\u6392\u5e8f\u5217\u8868 \u2192 Rerank \u91cd\u6392\u5e8f \u2192 \u53d6 top-N \u4e0a\u4e0b\u6587 \u2192 Prompt \u7ec4\u88c5\u3002<strong>RRF \u53ea\u662f\u53ec\u56de\u9636\u6bb5\u7684\u878d\u5408\uff0c\u8f93\u51fa\u540e\u8fd8\u4f1a\u9001\u5165 Rerank \u6a21\u578b\u505a\u7cbe\u7ec6\u6253\u5206\u8fc7\u6ee4\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u5f00\u7bc7\uff1aRAG \u68c0\u7d22\u94fe\u8def\u662f\u4ec0\u4e48 \u68c0\u7d22\u589e\u5f3a\u751f\u6210\uff08RAG\uff09\u8981\u8ba9\u5927\u6a21\u578b\u56de\u7b54\u524d\uff0c\u5148\u4ece\u8d44\u6599\u5e93\u4e2d\u627e\u5230\u76f8\u5173\u5185\u5bb9\u3002\u8fd9\u6761\u94fe\u8def\u7684<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1657\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":1662,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[23,25],"class_list":["post-1657","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai","tag-ai","tag-rag"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1657"}],"version-history":[{"count":1,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1657\/revisions"}],"predecessor-version":[{"id":1663,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1657\/revisions\/1663"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/1662"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}