“Search method”版本间的差异
来自cslt Wiki
(→synonyms method) |
(→lucene method) |
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第23行: | 第23行: | ||
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|} | |} | ||
+ | |||
+ | * TFIDF Formula | ||
+ | :* coord(q,d)*query_boost*query_norm*sum(idf^2 * tf * term_boost * norm(t,d)) | ||
==our method== | ==our method== |
2014年11月5日 (三) 13:08的版本
lucene method
- data set
- jiangkaipeng:
- different method result
method | Default | BM25 | LMDirichlet | DFR | LMJelinekMercer | IB |
---|---|---|---|---|---|---|
Accary | 0.66228 | 0.66228 | 0.4091 | 0.65476 | 0.65476 | 0.6666 |
- add boost keyword
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
:* coord(q,d)*query_boost*query_norm*sum(idf^2 * tf * term_boost * norm(t,d))
our method
method | lucene | BM25 | VSM |
---|---|---|---|
Accary | 0.6184 | 0.614 | 0.377 |
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[1]) 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[2]