“Optimize the parameter in different data source”版本间的差异

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=mert=
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[detail:http://blog.csdn.net/ict2014/article/details/25307019]
 
=method=
 
=method=
 
==Definition==
 
==Definition==

2014年12月9日 (二) 01:59的版本

mert

[detail:http://blog.csdn.net/ict2014/article/details/25307019]

method

Definition

  • 11.png

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

取自“http://index.cslt.org/mediawiki/index.php?title=Optimize_the_parameter_in_different_data_source&oldid=12881”