{"id":41352,"date":"2023-11-20T06:12:10","date_gmt":"2023-11-29T05:54:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%b0%9d%e8%af%95%e5%9c%a8elasticsearch%e4%b8%ad%e4%bd%bf%e7%94%a8learning-to-rank%ef%bc%81\/"},"modified":"2024-05-04T09:56:34","modified_gmt":"2024-05-04T01:56:34","slug":"%e6%88%91%e5%b0%9d%e8%af%95%e5%9c%a8elasticsearch%e4%b8%ad%e4%bd%bf%e7%94%a8learning-to-rank%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%b0%9d%e8%af%95%e5%9c%a8elasticsearch%e4%b8%ad%e4%bd%bf%e7%94%a8learning-to-rank%ef%bc%81\/","title":{"rendered":"\u6211\u5c1d\u8bd5\u5728Elasticsearch\u4e2d\u4f7f\u7528Learning-to-Rank\uff01"},"content":{"rendered":"<p>\u6b64\u6587\u662f\u300a\u96c6\u4f53 AdventCalendar 2019\u300b\u7684\u7b2c21\u5929\u6587\u7ae0\u3002<\/p>\n<h2>\u9996\u5148<\/h2>\n<p>\u56e0\u4e3a\u5728\u6700\u8fd1\u7684\u4e00\u5929\u91cc\uff0c\u6211\u88ab\u59d4\u6258\u8d1f\u8d23&#8221;\u6211\u60f3\u5728Elasticsearch\u4e0a\u8fdb\u884cLearning-to-rank\uff0c\u6240\u4ee5\u8bf7\u603b\u7ed3\u4e00\u4e0b\u73af\u5883\u642d\u5efa\u7684\u6b65\u9aa4\u548c\u4f7f\u7528\u65b9\u6cd5\u3002\u62dc\u6258\u4e86\uff01&#8221;\u6240\u4ee5\u8fd9\u6b21\u6211\u5c06\u4ecb\u7ecdElasticsearch\u4e0elearning-to-rank\u7684\u6784\u5efa\u6b65\u9aa4\u548c\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<p>\u8fd9\u6b21\u5236\u4f5c\u7684\u662f\u8fd9\u4e2a\u3002<\/p>\n<h2>\u5b66\u4e60\u6392\u5e8f\u662f\u6307<\/h2>\n<p>\u5728\u641c\u7d22\u5f15\u64ce\u4e2d\uff0c\u5b66\u4e60\u6392\u5e8f\u662f\u4e00\u79cd\u5229\u7528\u673a\u5668\u5b66\u4e60\u548c\u641c\u7d22\u6570\u636e\u6765\u6539\u5584\u641c\u7d22\u7ed3\u679c\u6392\u540d\u987a\u5e8f\u7684\u65b9\u6cd5\u3002\u5b83\u4e5f\u88ab\u79f0\u4e3a\u987a\u5e8f\u5b66\u4e60\u6216\u6392\u5e8f\u5b66\u4e60\u3002<\/p>\n<p>\u8fd9\u6b21\uff0c\u6211\u4eec\u5c06\u4f7f\u7528 Elasticsearch \u7684 learning-to-rank \u63d2\u4ef6\u3002\u6211\u60f3\u901a\u8fc7\u4f7f\u7528 learning-to-rank \u4ed3\u5e93\u4e2d\u7684\u793a\u4f8b\uff0c\u4f53\u9a8c\u4e00\u4e0b\u6392\u5e8f\u7684\u6539\u5584\u3002<\/p>\n<h2>\u73af\u5883\u5efa\u8bbe<\/h2>\n<p>\u4e3a\u4e86\u6d4b\u8bd5demo\uff0c\u6211\u4eec\u9700\u8981\u4e8b\u5148\u8fdb\u884c\u4ee5\u4e0b\u73af\u5883\u642d\u5efa\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java \u306e\u5b9f\u884c\u74b0\u5883<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Python3 \u306e\u5b9f\u884c\u74b0\u5883<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Elasticsearch \u306b learning-to-rank \u30d7\u30e9\u30b0\u30a4\u30f3\u3092\u5c0e\u5165<\/ul>\n<\/li>\n<\/ul>\n<p>https:\/\/github.com\/elastic\/elasticsearch<br \/>\nhttps:\/\/github.com\/o19s\/elasticsearch-learning-to-rank<\/p>\n<p>\u4f7f\u7528\u5e26\u6709\u63d2\u4ef6\u7684 Elasticsearch \u7684\u6784\u5efa\uff0c\u4f7f\u7528 Docker \u955c\u50cf\u4f1a\u66f4\u65b9\u4fbf\u3002<\/p>\n<ul class=\"post-ul\">https:\/\/hub.docker.com\/_\/elasticsearch<\/ul>\n<p>\u4ee5\u4e0b\u662fElasticsearch\u5e26\u6709Learning-to-Rank Docker\u955c\u50cf\u7684\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">FROM<\/span><span class=\"s\"> elasticsearch:7.4.1<\/span>\r\n\r\n<span class=\"k\">RUN <\/span>bin\/elasticsearch-plugin <span class=\"nb\">install<\/span> <span class=\"nt\">-b<\/span> http:\/\/es-learn-to-rank.labs.o19s.com\/ltr-1.1.2-es7.4.1.zip\r\n<\/code><\/pre>\n<p>\u5728\u73af\u5883\u6784\u5efa\u5b8c\u6210\u540e\uff0c\u5c06 Learning-to-Rank \u5b58\u50a8\u5e93\u514b\u9686\u5e76\u79fb\u52a8\u5230\u6f14\u793a\u76ee\u5f55\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>git clone https:\/\/github.com\/o19s\/elasticsearch-learning-to-rank.git\r\n<span class=\"nv\">$ <\/span><span class=\"nb\">cd <\/span>elasticsearch-learning-to-rank\/demo\r\n<\/code><\/pre>\n<p>\u5728\u8fdb\u5165demo\u6587\u4ef6\u5939\u540e\uff0c\u6309\u987a\u5e8f\u6267\u884c\u811a\u672c\u6765\u4f53\u9a8cLearning-to-Rank\uff01<\/p>\n<h2>\u51c6\u5907\u6570\u636e\u548c\u5e93\u3002<\/h2>\n<p>\u8fd0\u884cprepare.py\uff0c\u4e0b\u8f7d\u7528\u4e8e\u521b\u5efa\u641c\u7d22\u6570\u636e\u548c\u5b66\u4e60\u6a21\u578b\u7684\u5e93\uff08Ranklib\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python prepare.py\r\n<\/code><\/pre>\n<p>\u4e0b\u8f7d\u540e, \u4f1a\u4e0b\u8f7d\u7535\u5f71\u6570\u636e\uff08tmdb.json\uff09\u548c\u6392\u540d\u5b66\u4e60\u5e93\uff08RankLibPlus-0.1.0.jar\uff09\u3002\u8bf7\u6ce8\u610f\uff0c\u7531\u4e8etmdb.json\u6587\u4ef6\u8f83\u5927\uff0c\u4e0b\u8f7d\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u65f6\u95f4\u3002<br \/>\n\u4e0b\u8f7d\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u5c06\u51c6\u5907Elasticsearch\u73af\u5883\u3002<\/p>\n<h2>\u8bbe\u7f6eElasticsearch\u73af\u5883<\/h2>\n<p>\u542f\u52a8\u5b89\u88c5\u4e86Learning-to-Rank\u63d2\u4ef6\u7684Elasticsearch\uff0c\u5e76\u5c06\u6570\u636e\u8f93\u5165\u5176\u4e2d\u3002\u5728Elasticsearch\u542f\u52a8\u540e\uff0c\u6267\u884cindex_ml_tmdb.py\u811a\u672c\u8fdb\u884c\u7d22\u5f15\u8bbe\u7f6e\u548c\u6570\u636e\u63d2\u5165\u3002\u6267\u884c\u4ee5\u4e0b\u811a\u672c\u5c06tmdb.json\u63d2\u5165Elasticsearch\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python index_ml_tmdb.py\r\n<\/code><\/pre>\n<p>\u5b8c\u6210\u8bbe\u7f6e\u7d22\u5f15\u548c\u63d2\u5165\u6570\u636e\u540e\uff0c\u63a5\u4e0b\u6765\u9700\u8981\u8bbe\u7f6e\u7528\u4e8e\u5b66\u4e60\u7684\u7279\u5f81\u8f6c\u6362\u67e5\u8be2\u3002\u6267\u884c\u4ee5\u4e0b\u811a\u672c\u53ef\u8bbe\u7f6e\u7528\u4e8e\u5b66\u4e60\u7684\u5b57\u6bb5\u3002\uff08\u8bbe\u7f6e\u7684\u5b57\u6bb5\u53ef\u53c2\u8003 demo\/1.json \u548c demo\/2.json\u3002\u5728 demo \u4e2d\uff0c\u5c06\u6807\u9898\u548c\u6982\u8ff0\u7684\u641c\u7d22\u5206\u6570\u8bbe\u7f6e\u4e3a\u7279\u5f81\u3002\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python load_features.py\r\n<\/code><\/pre>\n<p>\u7576\u5c07\u6578\u64da\u6e96\u5099\u597d\u8f49\u63db\u70ba\u7279\u5fb5\u6b04\u4f4d\u6642\uff0c\u6211\u5011\u5c07\u958b\u59cb\u5efa\u7acb\u6a21\u578b\u3002<\/p>\n<h2>\u5c06\u6a21\u578b\u90e8\u7f72\u5230Elasticsearch\u4e2d<\/h2>\n<p>\u8fd0\u884c train.py \u811a\u672c\u4ee5\u521b\u5efa\u6a21\u578b\uff0c\u5e76\u5c06\u5176\u90e8\u7f72\u5230 Elasticsearch \u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python train.py\r\n<\/code><\/pre>\n<p>\u5728train.py\u6587\u4ef6\u4e2d\uff0c\u5c06\u6267\u884c\u4ee5\u4e0b\u5904\u7406\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u524d\u51e6\u7406<\/ul>\n<\/li>\n<\/ul>\n<p>sample_judgements.txt \u3092\u30d1\u30fc\u30b9\u3057\u3066\u3001ranklib format \u306b\u5909\u63db\u3059\u308b\u3002<\/p>\n<p>\u30e2\u30c7\u30eb\u751f\u6210<\/p>\n<p>Ranklib \u3092\u5b9f\u884c\u3057\u3066\u3001\u30e2\u30c7\u30eb\u4f5c\u6210\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u30e2\u30c7\u30eb\u306e\u30c7\u30d7\u30ed\u30a4<\/p>\n<p>Easticsearch \u306b\u30e2\u30c7\u30eb\u3092\u5c0e\u5165\u3059\u308b\u3002<\/p>\n<h3>\u6570\u636e\u9884\u5904\u7406 (Data preprocessing)<\/h3>\n<p>\u5728demo\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528sample_judgements.txt\u8fdb\u884c\u5b66\u4e60\uff0c\u4ee5\u6539\u5584\u641c\u7d22\u7ed3\u679c\u7684\u6392\u540d\u3002sample_judgements.txt\u5305\u542b\u4e86\u9488\u5bf9\u641c\u7d22\u67e5\u8be2\uff08qid\uff09\u7684\u641c\u7d22\u7ed3\u679c\uff08#7555 Rambo\uff0c#1370 Rambo III\uff0c&#8230;\uff09\uff0c\u5e76\u4e3a\u6bcf\u4e2a\u641c\u7d22\u67e5\u8be2\u548c\u641c\u7d22\u7ed3\u679c\u7684\u7ec4\u5408\u8bbe\u7f6e\u4e86\u8bc4\u5206\uff08grade\uff09\u3002demo\u4e2d\u5305\u542b\u4ee5\u4e0b\u4e09\u79cd\u67e5\u8be2\u3002<\/p>\n<pre class=\"post-pre\"><code># qid:1: rambo\r\n# qid:2: rocky\r\n# qid:3: bullwinkle\r\n<\/code><\/pre>\n<p>\u5bf9\u4e8e\u6bcf\u4e2a\u67e5\u8be2\u7684\u641c\u7d22\u7ed3\u679c\uff0c\u8bf7\u8bbe\u7f6e\u4e00\u4e2a\u7b49\u7ea7\uff08\u6570\u5b57\u8d8a\u5927\u8d8a\u597d\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code># grade (0-4)   queryid docId   title\r\n4   qid:1 # 7555    Rambo\r\n3   qid:1 # 1370    Rambo III\r\n3   qid:1 # 1369    Rambo: First Blood Part II\r\n3   qid:1 # 1368    First Blood\r\n0   qid:1 # 136278  Blood\r\n0   qid:1 # 102947  First Daughter\r\n0   qid:1 # 13969   First Daughter\r\n0   qid:1 # 61645   First Love\r\n0   qid:1 # 14423   First Sunday\r\n0   qid:1 # 54156   First Desires\r\n4   qid:2 # 1366    Rocky\r\n3   qid:2 # 1246    Rocky Balboa\r\n3   qid:2 # 60375   Rocky VI\r\n3   qid:2 # 1371    Rocky III\r\n3   qid:2 # 1375    Rocky V\r\n3   qid:2 # 1374    Rocky IV\r\n0   qid:2 # 110123  Incredible Rocky Mountain Race\r\n0   qid:2 # 17711   The Adventures of Rocky &amp; Bullwinkle\r\n0   qid:2 # 36685   The Rocky Horror Picture Show\r\n4   qid:3 # 17711   The Adventures of Rocky &amp; Bullwinkle\r\n0   qid:3 # 1246    Rocky Balboa\r\n0   qid:3 # 60375   Rocky VI\r\n0   qid:3 # 1371    Rocky III\r\n0   qid:3 # 1375    Rocky V\r\n0   qid:3 # 1374    Rocky IV\r\n<\/code><\/pre>\n<p>\u5c06\u8fd9\u4e2a\u6570\u636e\u8f6c\u6362\u4e3a Ranklib \u683c\u5f0f\uff0c\u5c06\u4f1a\u5f97\u5230\u4ee5\u4e0b\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code>4       qid:1   1:12.318474     2:10.573917 # 7555      rambo\r\n3       qid:1   1:10.357875     2:11.950391 # 1370      rambo\r\n3       qid:1   1:7.010513      2:11.220095 # 1369      rambo\r\n3       qid:1   1:0.0   2:11.220095 # 1368      rambo\r\n0       qid:1   1:0.0   2:0.0 # 136278  rambo\r\n0       qid:1   1:0.0   2:0.0 # 102947  rambo\r\n0       qid:1   1:0.0   2:0.0 # 13969   rambo\r\n0       qid:1   1:0.0   2:0.0 # 61645   rambo\r\n0       qid:1   1:0.0   2:0.0 # 14423   rambo\r\n0       qid:1   1:0.0   2:0.0 # 54156   rambo\r\n4       qid:2   1:10.686391     2:8.814846 # 1366       rocky\r\n3       qid:2   1:8.985554      2:9.984511 # 1246       rocky\r\n3       qid:2   1:8.985554      2:8.067703 # 60375      rocky\r\n3       qid:2   1:8.985554      2:5.660549 # 1371       rocky\r\n3       qid:2   1:8.985554      2:7.300772 # 1375       rocky\r\n3       qid:2   1:8.985554      2:8.814846 # 1374       rocky\r\n0       qid:2   1:6.815921      2:0.0 # 110123  rocky\r\n0       qid:2   1:6.0816855     2:8.725066 # 17711      rocky\r\n0       qid:2   1:6.0816855     2:5.9764795 # 36685     rocky\r\n4       qid:3   1:7.6720834     2:12.722421 # 17711     bullwinkle\r\n0       qid:3   1:0.0   2:0.0 # 1246    bullwinkle\r\n0       qid:3   1:0.0   2:0.0 # 60375   bullwinkle\r\n0       qid:3   1:0.0   2:0.0 # 1371    bullwinkle\r\n0       qid:3   1:0.0   2:0.0 # 1375    bullwinkle\r\n0       qid:3   1:0.0   2:0.0 # 1374    bullwinkle\r\n<\/code><\/pre>\n<p>\u6211\u5c06\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u6765\u8fdb\u884c\u6a21\u578b\u521b\u5efa\u3002<\/p>\n<h3>\u751f\u6210\u6a21\u578b m\u00f3<\/h3>\n<p>\u521b\u5efa\u6a21\u578b\u3002\u5728\u6f14\u793a\u4e2d\uff0c\u5c06\u751f\u6210\u4ee5\u4e0b\u6a21\u578b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">MART<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">RankNet<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">RankBoost<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">AdaRank<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">coord Ascent<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">LambdaMART<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">ListNET<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Random Forest<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Linear Regression<\/ul>\n<p>\u5173\u4e8e\u5404\u4e2a\u578b\u53f7\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u672c\u6b21\u6211\u4eec\u5c06\u7701\u7565\u4e0d\u63d0\u3002<\/p>\n<h3>\u6a21\u578b\u4e0a\u4f20<\/h3>\n<p>\u5c06\u6a21\u578b\u4e0a\u4f20\u5230Elasticsearch\u3002\u4f7f\u7528POST\u8bf7\u6c42\u4e0a\u4f20\u751f\u6210\u7684\u6a21\u578b\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code>POST _ltr\/_featureset\/movie_features\/_createmodel\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"s2\">\"model\"<\/span>: <span class=\"o\">{<\/span>\r\n        <span class=\"s2\">\"name\"<\/span>: <span class=\"s2\">\"test_9\"<\/span>,\r\n        <span class=\"s2\">\"model\"<\/span>: <span class=\"o\">{<\/span>\r\n            <span class=\"s2\">\"type\"<\/span>: <span class=\"s2\">\"model\/ranklib\"<\/span>,\r\n            <span class=\"s2\">\"definition\"<\/span>: <span class=\"s2\">\"## Linear Regression<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">## Lambda = 1.0E-10<\/span><span class=\"se\">\\n<\/span><span class=\"s2\">0:0.2943936467995844 1:0.2943936467995844 2:0.12167703031808977\"<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5f53\u60a8\u4f7f\u7528\u5df2\u4e0a\u4f20\u7684\u6a21\u578b\u8fdb\u884c\u641c\u7d22\u65f6\uff0c\u8bf7\u6307\u5b9amodel.name\u3002<\/p>\n<h2>\u641c\u7d22<\/h2>\n<p>\u8ba9\u6211\u4eec\u4eb2\u81ea\u641c\u7d22\u4e00\u4e0b\uff0c\u4f53\u9a8c\u4e00\u4e0b\u901a\u8fc7Learning-to-Rank\u6765\u6539\u8fdb\u641c\u7d22\u7ed3\u679c\u7684\u6548\u679c\uff01\u5f53\u8fd0\u884csearch.py\u65f6\uff0c\u5c06\u83b7\u5f97\u4ee5\u4e0b\u641c\u7d22\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python search.py Rambo\r\n<span class=\"o\">{<\/span><span class=\"s2\">\"query\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"multi_match\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"query\"<\/span>: <span class=\"s2\">\"Rambo\"<\/span>, <span class=\"s2\">\"fields\"<\/span>: <span class=\"o\">[<\/span><span class=\"s2\">\"title\"<\/span>, <span class=\"s2\">\"overview\"<\/span><span class=\"o\">]}}<\/span>, <span class=\"s2\">\"rescore\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"query\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"rescore_query\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"sltr\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"params\"<\/span>: <span class=\"o\">{<\/span><span class=\"s2\">\"keywords\"<\/span>: <span class=\"s2\">\"Rambo\"<\/span><span class=\"o\">}<\/span>, <span class=\"s2\">\"model\"<\/span>: <span class=\"s2\">\"test_6\"<\/span><span class=\"o\">}}}}}<\/span>\r\nRambo\r\nRambo III\r\nRambo: First Blood Part II\r\nFirst Blood\r\nIn the Line of Duty: The F.B.I. Murders\r\nSon of Rambow\r\nSpud \r\n<span class=\"err\">$<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u4e3a\u5f88\u96be\u7406\u89e3\uff0c\u6240\u4ee5\u6211\u51c6\u5907\u4e86\u4e00\u4e2a\u6bd4\u8f83\u6709\u65e0Learning-to-Rank\u7684\u7ed3\u679c\u3002\u5206\u522b\u53ef\u4ee5\u5f97\u5230\u4ee5\u4e0b\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code>## search with learning-to-rank\r\n1 Rambo\r\n2 Rambo III\r\n3 Rambo: First Blood Part II\r\n4 First Blood\r\n5 In the Line of Duty: The F.B.I. Murders\r\n6 Son of Rambow\r\n7 Spud\r\n\r\n## search without learning-to-rank\r\n1 Rambo\r\n2 Rambo III\r\n3 First Blood\r\n4 Rambo: First Blood Part II\r\n5 In the Line of Duty: The F.B.I. Murders\r\n6 Son of Rambow\r\n7 Spud\r\n<\/code><\/pre>\n<p>\u4f60\u7684\u5b66\u4e60\u6210\u679c\u6709\u6240\u4f53\u73b0\u554a\uff01<\/p>\n<h2>\u6982\u62ec<\/h2>\n<p>\u8fd9\u6b21\u6211\u4eec\u4ecb\u7ecd\u4e86\u5728 Elasticsearch \u4e2d\u5c1d\u8bd5 Learning-to-rank \u7684\u6b65\u9aa4\uff0c\u5e76\u6210\u529f\u5c06 Learning-to-rank \u5e94\u7528\u5230\u641c\u7d22\u5f15\u64ce\u4e2d\u3002\u4e3a\u4e86\u65b9\u4fbf\u5927\u5bb6\u8bd5\u7528\uff0c\u6211\u4eec\u5c06\u672c\u6b21\u4f7f\u7528\u7684\u5e93\u6574\u7406\u5230\u4e86\u4ed3\u5e93\u4e2d\uff0c\u5e0c\u671b\u60a8\u80fd\u4f7f\u7528\u5b83\u3002<br \/>\n\u53e6\u5916\uff0c\u5728\u672c\u6587\u4e2d\u6211\u4eec\u4ecb\u7ecd\u4e86\u6267\u884c\u6b65\u9aa4\uff0c\u4f46\u5982\u679c\u6709\u673a\u4f1a\u7684\u8bdd\uff0c\u6211\u4e5f\u5e0c\u671b\u80fd\u4ecb\u7ecd\u66f4\u8be6\u7ec6\u7684\u5185\u5bb9\uff0c\u4f8b\u5982 Learning-to-rank \u7684\u5404\u4e2a\u903b\u8f91\u4ee5\u53ca\u672c\u6b21\u4f7f\u7528\u7684\u5e93\u7684\u673a\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6b64\u6587\u662f\u300a\u96c6\u4f53 AdventCalendar 2019\u300b\u7684\u7b2c21\u5929\u6587\u7ae0\u3002 \u9996\u5148 \u56e0\u4e3a\u5728\u6700\u8fd1\u7684\u4e00\u5929\u91cc\uff0c\u6211\u88ab\u59d4\u6258\u8d1f\u8d23 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41352","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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