图 书 馆
层次主题与Pachinko分配的混合Mixtures of Hierarchical Topics with Pachinko Allo cation |
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| 课程网址: | http://videolectures.net/icml07_mimno_moht/ |
| 主讲教师: | David Mimno |
| 开课单位: | 马萨诸塞大学 |
| 开课时间: | 2007-06-23 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | The four-level pachinko al location model (PAM) (Li & McCallum, 2006) represents correlations among topics using a DAG structure. It does not, however, represent a nested hierarchy of topics, with some topical word distributions representing the vocabulary that is shared among several more specific topics. This paper presents hierarchical PAM -- an enhancement that explicitly represents a topic hierarchy. This model can be seen as combining the advantages of hLD's topical hierarchy representation with PAM's ability to mix multiple leaves of the topic hierarchy. Experimental results show improvements in likelihood of held-out documents, as well as mutual information between automatically-discovered topics and humangenerated categories such as journals. |
| 关 键 词: | 四级弹球位置模型; 主题层次结构; 保留文件 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-05-26：cwx |
| 阅读次数: | 110 |