Hello! I'd like to ask if this approach: construct a complex query consisting of a boosted "specialized" part and an "ordinary" part with no boost, - doesn't [necessarily] cause a significant performance degradation compared to a "custom query", specialized for a particular need.
Thanks in advance, Alexey Morozov 26.01.2015 14:57, Michael McCandless пишет: > Well you could have ordinary term queries, and then a SHOULD SpanFirstQuery > clause with a boost, to give higher scores to those docs that also had the > term(s) close to the start of the document. > > > Mike McCandless > > http://blog.mikemccandless.com > > On Sun, Jan 25, 2015 at 5:44 PM, Luis A Lastras <lastr...@us.ibm.com> wrote: > >> Thanks I didn't know about SpanFirstQuery. I can likely get something >> going with that. I was still hoping that we could affect the scoring >> formula with the position itself, but maybe this is not feasible. >> >> Luis >> >> >> >> ------------------------------ >> >> >> >> *Luis A Lastras, Ph.D. Research Staff Member & Manager, Concept Analytics, >> IBM Watson* >> *Member of the iBM Academy of Technology* >> >> *IBM Master Inventor email: **lastr...@us.ibm.com* <em...@region.ibm.com> >> * | Tel: 914-945-3613 <914-945-3613> | Cell: 914-382-1879 <914-382-1879> >> address: 1101 Kitchawan Rd, Office 28-132, Yorktown Heights, NY, 10598* >> >> >> >> >> <http://www.facebook.com/ibmwatson> >> >> >> ------------------------------ >> >> >> >> [image: Inactive hide details for Michael McCandless ---01/25/2015 >> 08:12:18 AM---Maybe SpanFirstQuery? Mike McCandless]Michael McCandless >> ---01/25/2015 08:12:18 AM---Maybe SpanFirstQuery? Mike McCandless >> >> From: Michael McCandless <luc...@mikemccandless.com> >> To: Lucene Users <java-user@lucene.apache.org> >> Date: 01/25/2015 08:12 AM >> Subject: Re: Absolute term position in scoring >> ------------------------------ >> >> >> >> Maybe SpanFirstQuery? >> >> >> Mike McCandless >> >> http://blog.mikemccandless.com >> >> On Sat, Jan 24, 2015 at 9:34 PM, Luis A Lastras <lastr...@us.ibm.com> >> wrote: >> >>> Is it possible to incorporate in Lucene's scoring function the position >> of >>> a matching term (say as measured from the top of the document). The >>> scenario is, if the set of documents tend to lk about the most important >>> stuff at the beginning of the document, then we would like to give >>> preference to documents that mention a term close to the top. >>> >>> Thanks, >>> >>> Luis >>> >>> >>> >>> ------------------------------ >>> >>> >>> >>> *Luis A Lastras, Ph.D. Research Staff Member & Manager, Concept >> Analytics, >>> IBM Watson* >>> *Member of the iBM Academy of Technology* >>> >>> *IBM Master Inventor email: **lastr...@us.ibm.com* <em...@region.ibm.com >>> >>> * | Tel: 914-945-3613 <914-945-3613> | Cell: 914-382-1879 <914-382-1879> >>> address: 1101 Kitchawan Rd, Office 28-132, Yorktown Heights, NY, >> 10598* >>> >>> >>> >>> <http://www.facebook.com/ibmwatson> >>> >>> >>> ------------------------------ >>> >>> >>> >> --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
