“Optimize the parameter in different data source”版本间的差异
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| − | [http://blog.csdn.net/ict2014/article/details/25307019 | + | *[http://blog.csdn.net/ict2014/article/details/25307019 method-deatil] |
| + | *[http://www.cs.jhu.edu/~ozaidan/zmert/ tool] | ||
=method= | =method= | ||
2014年12月9日 (二) 02:01的最后版本
MERT
method
Definition
problem
boost some specific field in lucene
- Here is how you can do that[1]
Query titleQuery, viewsQuery; titleQuery.setBoost(0.8); viewsQuery.setBoost(0.2); BooleanQuery query = new BooleanQuery(); query.add(titleQuery, Occur.MUST); // or Occur.SHOULD if this clause is optional query.add(viewsQuery, Occur.SHOULD); // or Occur.MUST if this clause is required // use query to search documents
The score will be proportional to 0.8*score(titleQuery) + 0.2*score(viewsQuery) (to a multiplicative constant). To leverage your views field, you will probably need to use a ValueSourceQuery
