| Presentation | 2003/10/30 Modeling Category Structures with a Kernel Function(Natural Language Understanding and Models of Communication) Hiroya Takamura, Yuji Matsumoto, Hiroyasu Yamada, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose one type of TOP (Tangent vector Of the Posterior log-odds) kernels and apply itto text categorization. In a number of categorization tasks including text categorization, negativeexamples are usually more common than positive examples and there may be several differenttypes of negative examples. Therefore, we regard the probabilistic model of negative examples as a mixture of several models respectively corresponding to given categories. Since each model of ours is expressed using a one-dimensional Gaussian-type function, our kernel has an advantage in computational time. In our experiments, our kernel, combined with SVMs, outperformed the linear kernel and the Fisher kernel based on the Probabilistic Latent Semantic Indexing model. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | text categorization / TOP kernel |
| Paper # | NLC2003-32 |
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| Conference Information | |
| Committee | NLC |
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| Conference Date | 2003/10/30(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Natural Language Understanding and Models of Communication (NLC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Modeling Category Structures with a Kernel Function(Natural Language Understanding and Models of Communication) |
| Sub Title (in English) | |
| Keyword(1) | text categorization |
| Keyword(2) | TOP kernel |
| 1st Author's Name | Hiroya Takamura |
| 1st Author's Affiliation | Precision and Intelligence Laboratory, Tokyo Institute of Technology() |
| 2nd Author's Name | Yuji Matsumoto |
| 2nd Author's Affiliation | Graduate School of Information Science, Nara Institute of Science and Technology |
| 3rd Author's Name | Hiroyasu Yamada |
| 3rd Author's Affiliation | Graduate School of Information Science. Japan Institute of Science and Technology |
| Date | 2003/10/30 |
| Paper # | NLC2003-32 |
| Volume (vol) | vol.103 |
| Number (no) | 407 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |