Integrating BM25 & BM25F into Lucene1
Integrating BM25 & BM25F into Lucene JoaquÃn Pérez-Iglesias Introduction This document describes the BM25 and BM25F implementation using the Lucene Java Framework. The implementation described here can be downloaded from http://nlp.uned.es/~jperezi/Lucene-BM25/jar/models.jar. Both models have stood out at TREC by their performance and are considered as state-of-the-art in the IR community. BM25 i
Solr Boot Camp Instructor: Erik Hatcher [email protected] 1Wednesday, November 5, 2008 Prerequisites • Solr 1.3 (and Java5) • These slides • Web browser open to: http://wiki.apache.org/solr 2Wednesday, November 5, 2008 Solr Story 3W
Solr Boot Camp Instructor: Erik Hatcher [email protected] 1Wednesday, November 5, 2008 Prerequisites • Solr 1.3 (and Java5) • These slides • Web browser open to: http://wiki.apache.org/solr 2Wednesday, November 5, 2008 Solr Story 3Wednesday, November 5, 2008 • Created byYonik Seeley for CNET • Contributed to Apache in January 2006 • December 2006:Version 1.1 released • June 2007:V
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Local Lucene Geographical Search
by Patrick O'Leary (pjaol at pjaol.com) There are 3 components to how local lucene performs a geographical search. Create a bounding area. Query that areas document set for a text match. Reduce the document set to a precise distance from a center point. Geographical text searching can take multiple formats, inclusion or reductionism. Inclusion is applying text searching over a document set and ver
Lucene 2.4ã¨Lucene 2.0ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹æ§‹ç¯‰é€Ÿåº¦æ¯”較 - kaisehã®ãƒ–ãƒã‚°
Luceneã¯ã€ã“ã¡ã‚‰ã®ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ãªã©ã‚’見るé™ã‚Šã€Sennaãªã©ä»–ã®å…¨æ–‡æ¤œç´¢ã‚¨ãƒ³ã‚¸ãƒ³ã«æ¯”ã¹ã¦ç›¸å½“é…ã„ã¨ã•ã‚Œã¦ã„るよã†ã§ã™ã€‚ 上記ページã®ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã§ã¯Lucene 2.0ãŒä½¿ã‚ã‚Œã¦ã„ã¾ã™ã€‚僕も数年å‰ã«Lucene 2.0を使ã£ãŸã“ã¨ãŒã‚ã£ã¦ã€ãれ以é™ã¯Luceneã«è§¦ã‚Œã¦ã„ãªã‹ã£ãŸã‚“ã§ã™ãŒã€æœ€è¿‘ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯ãƒ‘フォーマンスãŒå¤§å¹…ã«æ”¹å–„ã•ã‚Œã¦ã„ã‚‹ãã†ãªã®ã§ã€ã©ã‚Œãらã„速ããªã£ãŸã®ã‹ã€ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ä½œæˆé€Ÿåº¦ã‚’比較ã—ã¦ã¿ã¾ã—ãŸã€‚ 比較ã«ä½¿ã£ãŸã®ã¯Lucene 2.4.1（2009/03）ã¨Lucene 2.0.0（2006/05）ã§ã™ã€‚以下ã®æ¡ä»¶ã§ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ä½œæˆæ™‚間を計測ã—ã¾ã—ãŸã€‚ データ: 日本語版Wikipediaã®ãƒ€ãƒ³ãƒ—ã‹ã‚‰å…ˆé 20万記事 インデックス形å¼: 記事タイトル: Store.YES, Index.ANALYZED（元文å—列＋インデックス） 記事本文: Store.COMPR
davisp's couchdb-lucene at master - GitHub
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3. 検索 (4)
2005.09.12ã€€æ ªå¼ä¼šç¤¾å››æ¬¡å…ƒãƒ‡ãƒ¼ã‚¿ã€€å®®æ¾¤äº†ç¥ Lucene 3ç« ã€€æ¤œç´¢ 3.1. 検索対象ã¨ãªã‚‹æƒ…å ± 3.2. 検索 3.3. 検索çµæžœ 3.4. 検索çµæžœã®çµžè¾¼ã¿ 3.5. 検索çµæžœã®ã‚½ãƒ¼ãƒˆ 3.4. 検索çµæžœã®çµžè¾¼ã¿ 検索çµæžœã®çµžã‚Šã“ã¿ã‚’è¡Œã„ãŸã„å ´åˆã¯ã€BooleanQueryクラスを用ã„ã¾ã™ã€‚ Query newQuery = QueryParser.parse(queryString,"content",analyzer); BooleanQuery bQuery = new BooleanQuery(); bQuery.add(oldQuery, true, false); bQuery.add(newQuery, true, false); Hits hits = indexSearcher.search(bQuery); BooleanQueryã®add()メソッドã§
全文検索システム#2 - Lucene & CJKAnalyzer
今回ã¯ã€å…¨æ–‡æ¤œç´¢ã‚¨ãƒ³ã‚¸ãƒ³ã® Lucene をテストã—ã¦ã¿ã¾ã™ã€‚標準㮠StandardAnalyzer ã¯ã€æ—¥æœ¬èªžã«å¯¾å¿œã—ã¦ã„ã¾ã›ã‚“ãŒã€Sen ã®å½¢æ…‹ç´ 解æžã‚’ã‚‚ã¡ã„㟠JapaneseAnalyzer ã‚„ bi-gram ã«ã‚ˆã‚‹ã€€CJKAnalyzer を使ã†ã“ã¨ã«ã‚ˆã‚Šã€æ—¥æœ¬èªžã«ã‚‚対応ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ Lucene ã®æœ€æ–°ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯ã€2.0.0 ã§ã€contrib ã« CJKAnalyzer ãŒã¯ã„ã£ã¦ã„ã‚‹ã®ã§ã€ä»Šå›žã¯ã“れを使ã†ã“ã¨ã«ã—ã¾ã™ã€‚ ã¾ãšã¯ã€Lucene 2.0.0 をインストールã—ã¾ã™ã€‚ $ cat LuceneTest.java import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.cjk.CJKAnalyzer; import org.apache.lucene.in
ウェブリブãƒã‚°ï¼šã‚µãƒ¼ãƒ“スã¯çµ‚了ã—ã¾ã—ãŸã€‚
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DistributedSearch - Solr - Apache Software Foundation
<!> Solr1.3 What is Distributed Search? When an index becomes too large to fit on a single system, or when a single query takes too long to execute, an index can be split into multiple shards, and Solr can query and merge results across those shards. If single queries are currently fast enough and one simply wishes to expand the capacity (queries/sec) of the search system, then standard whole inde
Lucene technicalities
Concurrency The first DMS document posed a few questions regarding Lucene usage in a multithreaded environment. The DMS must be able to handle concurrent updates and queries. Fortunately, searching and updating of Lucene indexes are non-conflicting operations, which means they can be done at the same time. The result of querying an index which is undergoing updates, is that you will only get resul
Hadoop + Luceneã§åˆ†æ•£ã‚¤ãƒ³ãƒ‡ã‚¯ã‚·ãƒ³ã‚° - moratorium
Hadoop + Luceneã§åˆ†æ•£ã‚¤ãƒ³ãƒ‡ã‚¯ã‚·ãƒ³ã‚° 2008-08-27 (Wed) 1:07 Hadoop Hadoop (0.17ç³») + Lucene (2.3ç³») ã§æ¤œç´¢ç”¨ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’分散インデクシングã™ã‚‹ã‚³ãƒ¼ãƒ‰ã‚’公開ã—ã¦ã¿ã¾ã™ã€‚HDDã«çœ らã›ã¦ã‚‹ã®ã¯ã¡ã‚‡ã£ã¨ã‚‚ã£ãŸã„ãªã„。 ã„ããªã‚Šã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã€‚ package net.kzk9; import java.io.*; import java.util.*; import org.apache.hadoop.conf.*; import org.apache.hadoop.fs.*; import org.apache.hadoop.io.*; import org.apache.hadoop.mapred.*; import org.apache.hadoop.util.*; import org.apache.lucene.i
Luceneã§åˆ†æ•£ã‚¤ãƒ³ãƒ‡ã‚¯ã‚·ãƒ³ã‚°
最近Luceneを使ã£ã¦ã¿ã¦ã„る。Luceneを使ã£ã¦å®Ÿé¨“用ã®ãƒ–ãƒã‚°æ¤œç´¢ã‚¨ãƒ³ã‚¸ãƒ³ï¼ˆã½ã„ã‚‚ã®ï¼‰ã‚’作ã£ã¦ã„ã‚‹ãŒã€ã¨ã«ã‹ãインデクシングãŒé…ã„。Nutchã§ã¯ã€Luceneã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’ã„ãã¤ã‚‚ã®ãƒžã‚·ãƒ³ã«ä½œæˆã—ã¦ã€ã‚¤ãƒ³ãƒ‡ã‚¯ã‚·ãƒ³ã‚°/検索共ã«åˆ†æ•£ã—ã¦ã‚„ã‚‹ã“ã¨ãŒæŽ¨å¥¨ã•ã‚Œã¦ã„るよã†ã ãŒã€æ®‹å¿µãªãŒã‚‰å¸¸æ™‚å 有ã§ãるマシンãŒãŸãã•ã‚“ã‚ã£ãŸã‚Šã¯ã—ãªã„。 Luceneã®æœ¬ã«ã‚ˆã‚Œã°ã€ãƒžãƒ«ãƒã‚¹ãƒ¬ãƒƒãƒ‰ã§ãƒ¡ãƒ¢ãƒªä¸Šã«ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’作æˆã—ã¦ã€ã‚ã¨ã§ã¾ã¨ã‚ã¦1ã¤ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’ファイルシステム上ã«ä½œã‚‹ã¨ã„ã†ã®ãŒã€Luceneã®ã‚¤ãƒ³ãƒ‡ã‚¯ã‚·ãƒ³ã‚°ã‚’高速化ã™ã‚‹å¸¸å¥—手段らã—ã„。ã—ã‹ã—ã€ãã‚Œã§é«˜é€ŸåŒ–ã§ãã‚‹ã®ã¯æœ€å¤§ã§ã‚‚（インデックスã®ãƒžãƒ¼ã‚¸ã«ã‹ã‹ã‚‹æ™‚é–“ãŒ0ã¨ã—ã¦ã‚‚）1ã¤ã®ãƒžã‚·ãƒ³ä¸Šã®CPUæ•°ã ã‘ã§ã€å¤§å¹…ãªé«˜é€ŸåŒ–ã¯ã§ããªã„。 ãã“ã§ã€è¤‡æ•°ã®ãƒžã‚·ãƒ³ã§ãƒ¡ãƒ¢ãƒªä¸Šã«ã§ãã‚‹ã ã‘大ããªï¼ˆãƒ¡ãƒ¢ãƒªãŽã‚ŠãŽã‚Šã®ï¼‰ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã‚’作æˆã—ã€ãれをファイルã«æ›¸ã出ã—ã¦ãƒ
Luceneã¨Sennaã®æ¯”較：スコア計算 | é–¢å£å®å¸ã®Luceneブãƒã‚°
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BooleanQuerySyntax - Apache Lucene (Java) - Apache Software Foundation
Confusion I found something kind of weird about the way Lucene interprets boolean expressions without parenthesis. when i run the query A AND B OR C, it returns only the documents that have A(in other words as if the query was just the term A). when I run the query A OR B AND C, it returns only the documents that have B AND C(as if the query was just B AND C ). I set the default operator in my app
java.net: QueryParser Rules
QueryParser Rules by Erik Hatcher 11/06/2003 Suppose you are searching the Web for pages that contain both the words java and net but not the word dot. What if search engines made you type in something like the following for this simple query? BooleanQuery query = new BooleanQuery(); query.add(new TermQuery(new Term("contents","java")), true, false); query.add(new TermQuery(new Term("conte
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