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这里没有巫术！通过逆协方差估计学习离散图形模型No voodoo here! Learning discrete graphical models via inverse covariance estimation |
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| 课程网址: | http://videolectures.net/nips2012_loh_estimation/ |
| 主讲教师: | Po-Ling Loh |
| 开课单位: | 加利福尼亚大学 |
| 开课时间: | 2013-01-16 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | We investigate the relationship between the support of the inverses of generalized covariance matrices and the structure of a discrete graphical model. We show that for certain graph structures, the support of the inverse covariance matrix of indicator variables on the vertices of a graph reflects the conditional independence structure of the graph. Our work extends results which were previously established only for multivariate Gaussian distributions, and partially answers an open question about the meaning of the inverse covariance matrix of a non-Gaussian distribution. We propose graph selection methods for a general discrete graphical model with bounded degree based on possibly corrupted observations, and verify our theoretical results via simulations. Along the way, we also establish new results for support recovery in the setting of sparse high-dimensional linear regression based on corrupted and missing observations. |
| 关 键 词: | 图形模型; 离散图形模型; 多元高斯分布 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-07-17：yumf |
| 阅读次数: | 56 |