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

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==Definition==
 
==Definition==
 
* formula  
 
* formula  
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:* data source: q:standard question, q-a:standard question and answer, q-e: standard question and extracted question, q-w:standard question with weight.
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score(q_1,query)=w_1×f_1 (q_1,query,STD)+w_(2×) f_1 (q_1,query,STD+ANS)+w_3×f_1 (q_1,query,STD+EXT)
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:* lucent result: q: q1 ,q2 ,q3 ,q4,q5, q-a:k1,k2,k3,k4,k5, q-e:m1,m2,m3,m4,m5
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==boost some specific field in lucene==
 
==boost some specific field in lucene==
 
* Here is how you can do that[http://stackoverflow.com/questions/9829161/lucene-how-to-boost-some-specific-field]
 
* Here is how you can do that[http://stackoverflow.com/questions/9829161/lucene-how-to-boost-some-specific-field]

2014年11月21日 (五) 02:28的版本

method

Definition

  • formula

score(q_1,query)=w_1×f_1 (q_1,query,STD)+w_(2×) f_1 (q_1,query,STD+ANS)+w_3×f_1 (q_1,query,STD+EXT)

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=12620”