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arXiv cs/0305028cs.AIcs.NE
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基于Potts自旋平均场理论的Dempster-Shafer聚类

Dempster-Shafer clustering using Potts spin mean field theory

Mats Bengtsson, Johan Schubert

摘要:

在这篇文章中,我们研究了Dempster-Shafer理论中的一个问题,其中2**q - 1个证据通过最小化元冲突函数或等价地通过最小化所有聚类上的冲突权重之和而被聚类到q个聚类中。以前,我们中的一个开发了一种基于Hopfield和Tank模型的方法。然而,对于非常大的问题,我们需要一种具有较低计算复杂性的方法。我们证明,证据冲突的重量,作为一个近似,可以线性化,并映射到一个反铁磁Potts自旋模型。这有助于有效的数值解,即使是大的问题大小。最佳或接近最佳的解决方案,发现Dempster-Shafer聚类基准测试的时间复杂度约为O(N**2 log**2 N)。此外,反铁磁Potts自旋模型和图优化问题之间的同构。图模型具有动态变量,这些动态变量存在于链接上,这些动态变量具有与证据之间的成对冲突直接相关的先验概率。因此,三个不同的模型之间的关系。

英文摘要:

In this article we investigate a problem within Dempster-Shafer theory where 2**q - 1 pieces of evidence are clustered into q clusters by minimizing a metaconflict function, or equivalently, by minimizing the sum of weight of conflict over all clusters. Previously one of us developed a method based on a Hopfield and Tank model. However, for very large problems we need a method with lower computational complexity. We demonstrate that the weight of conflict of evidence can, as an approximation, be linearized and mapped to an antiferromagnetic Potts Spin model. This facilitates efficient numerical solution, even for large problem sizes. Optimal or nearly optimal solutions are found for Dempster-Shafer clustering benchmark tests with a time complexity of approximately O(N**2 log**2 N). Furthermore, an isomorphism between the antiferromagnetic Potts spin model and a graph optimization problem is shown. The graph model has dynamic variables living on the links, which have a priori probabilities that are directly related to the pairwise conflict between pieces of evidence. Hence, the relations between three different models are shown.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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