矩阵分解及应用.pptx

Deng Cai (蔡登)
College puter ScienceZhejiang University
dengcai@
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Matrix Factorization
What Is Matrix Factorization?
Why Matrix Factorization?
Image Recovery
mendation
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The Matrix
Star Wars
Roman Holiday
Titanic
Shrek
Madagascar
Alice
Bob
Tracy
Steven
John
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Search: Information Retrival
Machine Learning
Search: Information Retrival
Language Model Paradigm in IR
Probabilistic relevance model
Random variables
Bayes’ rule
prior probability of relevance for document d (. quality, popularity)
probability of generating a query q to ask for relevant d
probability that document d is relevant for query q
J. Ponte and . Croft, A Language Model Approach to Information Retrieval, ACM SIGIR, 1998.