“Search method”版本间的差异

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lucene method
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boost keyword
第6行: 第6行:
  
 
= boost keyword =
 
= boost keyword =
* boost the query keyword using IDF
+
[[boost keyword before search]]
{| border="2px"
+
|+ boost keyword  in lucene
+
|-
+
! method !!Default  !! idf_train !! idf_train_norm!! idf_baidu !! idf_baidu_norm
+
|-
+
! Accary
+
| 0.66228 ||  0.651629 ||0.57644|| 0.647869|| 0.65288
+
|-
+
 
|}
 
|}
 
* TFIDF Formula
 
* TFIDF Formula

2014年11月21日 (五) 01:12的版本

MERT-4 Method

lucene method

different method in lucene

boost keyword

boost keyword before search |}

  • TFIDF Formula
  • coord(q,d)*query_boost*query_norm*sum(idf^2 * tf * term_boost * norm(t,d)) [1]
  • add the new keyword value from proMe method

our method

different result in lucene
method lucene vsm_idf(haiguan) VSM_idf(baidu) vsm_idf(tain) vsm_idf(calculate)
Accary 0.6628 0.6228 0.6197 0.5827 0.5426

synonyms method

  • fuzzy match
  • calculate the similarity value = 1/(5-5*av_value).where av_value = average(word2vec+Synonyms forest+hownet).
  • lucene
  • lucene4.6 already added synonyms method (org.apache.lucene.analysis.synonym[2]) like :(a -> x) (a b -> y) (b c d -> z) or extend the query.

find

  • 采用最细粒度分词(对于标准问题在建立索引时,模板不用),可以提高正确率。61=>66.对于标准问题建索引时.
  • 对输入的问题不应用细粒度分词(细粒度的59%,不用66%)。
  • lucene4.6 已经增加了同义词拓展[3]

bug fix

  • vsm method
  • doesn't clear the pattern before search