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2011 Apr 01
2
New Idea on Ranking in IR
...Europe whom i am going to join for Ph.D about GSoC and
more precisely Xapian.
Generally the ranking is unsupervised, where the rank list is produced based
on the score provided by the ranking function. Ranking functions are
unsupervised like BM25, TF-IDF and so on. So we give the rank list in the
dercreasing order of the score.
Well learning to rank involves supervised learning. If we can extract
features for a query and intial retrieval of documents pairs then we can say
which document should come above which. Basically search engine requires
relevant documents in top order, because user gnerally nev...