| Presentation | 2010-01-19 An Extension of Matrix Factorization to Mixture Model and an Application to Prediction of Movei Ratings Masayoshi NAKAMURA, Takashi TAKENOUCHI, Kazushi IKEDA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recommendation systems suggest items to an user, based on existing history of evaluation for items by the users. In many cases, history information of users is represented as a matrix form, in which most part are missing. Matrix factorization is a well-known method for predicting missing values of the sparse matrix. The cost function of the conventional matrix factorization corresponds to the log-likelihood with a single Gaussian model, whose mean is assumed to be factorizes. However, in real-world datasets, a group of users forms a cluster and each cluster has different characteristic. For the situation the model of single Gaussian is not appropriate. To tackle the situation, in this report, we extend matrix factorization with a mixture model, and investigate our method using a synthetic dataset and a real-world dataset. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Matrix factorization / Mixture model / Missing value prediction / Probabilistic model |
| Paper # | NC2009-86 |
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| Conference Information | |
| Committee | NC |
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| Conference Date | 2010/1/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Neurocomputing (NC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Extension of Matrix Factorization to Mixture Model and an Application to Prediction of Movei Ratings |
| Sub Title (in English) | |
| Keyword(1) | Matrix factorization |
| Keyword(2) | Mixture model |
| Keyword(3) | Missing value prediction |
| Keyword(4) | Probabilistic model |
| 1st Author's Name | Masayoshi NAKAMURA |
| 1st Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology() |
| 2nd Author's Name | Takashi TAKENOUCHI |
| 2nd Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology |
| 3rd Author's Name | Kazushi IKEDA |
| 3rd Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology |
| Date | 2010-01-19 |
| Paper # | NC2009-86 |
| Volume (vol) | vol.109 |
| Number (no) | 363 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |