Daniel Valcarce

recommender systems collaborative filtering information retrieval language models relevance-based language models discriminative power robustness evaluation recsys 2015 ecir2016 doctoral symposium pseudo-relevance feedback phd thesis matrix factorization linear methods borda count metasearch condorcet copeland rank aggregation idf effect additive smoothing relevance models axiomatic analysis hadoop distributed systems mapreduce big data memcached mysql cluster varnish cassandra solr smoothing methods prior probability recsys2015 neighbourhoods query expansion rocchio's model