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创成二进看点模型证据积累聚类A Generative Dyadic Aspect Model for Evidence Accumulation Clustering |
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| 课程网址: | http://videolectures.net/simbad2011_figueiredo_clustering/ |
| 主讲教师: | Mário A. T. Figueiredo |
| 开课单位: | 里斯本电信学院 |
| 开课时间: | 2011-10-17 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Evidence accumulation clustering (EAC) is a clustering combination method in which a pair-wise similarity matrix (the so-called co-association matrix) is learnt from a clustering ensemble. This co-association matrix counts the co-occurrences (in the same cluster) of pairs of objects, thus avoiding the cluster correspondence problem faced by many other clustering combination approaches. Starting from the observation that co-occurrences are a special type of dyads, we propose to model co-association using a generative aspect model for dyadic data. Under the proposed model, the extraction of a consensus clustering corresponds to solving a maximum likelihood estimation problem, which we address using the expectation-maximization algorithm. We refer to the resulting method as probabilistic ensemble clustering algorithm (PEnCA). Moreover, the fact that the problem is placed in a probabilistic framework allows using model selection criteria to automatically choose the number of clusters. To compare our method with other combination techniques (also based on probabilistic modeling of the clustering ensemble problem), we performed experiments with synthetic and real benchmark data-sets, showing that the proposed approach leads to competitive results. |
| 关 键 词: | 计算机科学; 机器学习; 集群 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2020-06-01：wuyq |
| 阅读次数: | 63 |