“Search method”版本间的差异
来自cslt Wiki
(→MERT-4 Method) |
(→MERT-4 Method) |
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第1行: | 第1行: | ||
=MERT-4 Method= | =MERT-4 Method= | ||
− | * [Optimize the parameter in different data source] | + | * [[Optimize the parameter in different data source]] |
=lucene method= | =lucene method= |
2014年11月21日 (五) 01:10的版本
MERT-4 Method
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 |
boost keyword
- boost the query keyword using IDF
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)) [1]
- add the new keyword value from proMe method
our method
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