An approximation algorithm for the spherical k-means problem with outliers by local search
An approximation algorithm for the spherical k-means problem with outliers by local search
复制标题
一种基于局部搜索的异常值球形k均值问题的逼近算法
DOI:
10.1007/s10878-021-00734-0
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发表时间:
2021-04
影响因子:
1
通讯作者:
Zou Juan
中科院分区:
文献类型:
--
作者:
Wang Yishui;Wu Chenchen;Zhang Dongmei;Zou Juan
We consider the spherical k-means problem with outliers, an extension of the k-means problem. In this clustering problem, all sample points are on the unit sphere. Given two integers k and z, we can ignore at most z points (outliers) and need to find at most k cluster centers on the unit sphere and assign remaining points to these centers to minimize the k-means objective. It has been proved that any algorithm with a bounded approximation ratio cannot return a feasible solution for this problem. Our contribution is to present a local search bi-criteria approximation algorithm for the spherical k-means problem.
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