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Term Weighting Schemes for Question Categorization

Presenter : Cheng-Han Tsai Authors : Xiaojun Quan , Wenyin Liu, Senior Member, IEEE, and Bite Qiu TPAMI, 2012. Term Weighting Schemes for Question Categorization. Outlines. Motivation Objectives Methodology Experiments Conclusions Comments. Motivation. Text categorization.

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Term Weighting Schemes for Question Categorization

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  1. Presenter : Cheng-Han Tsai Authors : XiaojunQuan, Wenyin Liu, Senior Member, IEEE, and Bite Qiu TPAMI, 2012 Term Weighting Schemes for Question Categorization

  2. Outlines Motivation Objectives Methodology Experiments Conclusions Comments

  3. Motivation Text categorization Questions are usually a piece of short text, can the existing term-weighting methods perform consistently in question categorization as they do in text categorization?

  4. Objectives UIQA This paper proposed new supervised term-weighting methods to deal with the problems that questions are usually a piece of short text

  5. Methodology : :

  6. Methodology

  7. Methodology

  8. Experiments – different values of k 20 Newsgroups Yahoo-natural Yahoo-500 Yahoo-1000

  9. Experiments – different kernels Yahoo-500 Yahoo-1000

  10. Experiments – different scales of data Yahoo-500 Yahoo-1000

  11. Experiments – overall Statistical Significance Test10-fold cross-validation Value of k: 30 Kernel: LINEAR

  12. Conclusions The three new methods, especially iqf*qf*icf, exhibit stable and consistent improvement over most of the previous term-weighting methods mentioned in the experiments.

  13. Comments • Advantages • This paper compares to many well-known methods, and it performs well. • Applications • Question Categorization

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