“Optimize the parameter in different data source”版本间的差异
来自cslt Wiki
（→boost some specific field） |
（→boost some specific field） |
||
| 第4行： | 第4行： | ||
:* data source: q:standard question, q-a:standard question and answer, q-e: standard question and extracted question, q-w:standard question with weight. | :* data source: q:standard question, q-a:standard question and answer, q-e: standard question and extracted question, q-w:standard question with weight. | ||
:* lucent result: q: q1 ,q2 ,q3 ,q4,q5, q-a:k1,k2,k3,k4,k5, q-e:m1,m2,m3,m4,m5 | :* lucent result: q: q1 ,q2 ,q3 ,q4,q5, q-a:k1,k2,k3,k4,k5, q-e:m1,m2,m3,m4,m5 | ||
| − | ==boost some specific field== | + | ==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] | ||
Query titleQuery, viewsQuery; | Query titleQuery, viewsQuery; | ||
| 第13行： | 第13行： | ||
query.add(viewsQuery, Occur.SHOULD); // or Occur.MUST if this clause is required | query.add(viewsQuery, Occur.SHOULD); // or Occur.MUST if this clause is required | ||
// use query to search documents | // 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. | ||
2014年11月21日 (五) 01:52的版本
method
Definition
- formula
- data source: q:standard question, q-a:standard question and answer, q-e: standard question and extracted question, q-w:standard question with weight.
- lucent result: q: q1 ,q2 ,q3 ,q4,q5, q-a:k1,k2,k3,k4,k5, q-e:m1,m2,m3,m4,m5
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.
