Panel data clustering method based on grey convex relation and its application

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机构：
[1] Wu, Li-Feng
[2] Liu, Si-Feng
来源：
Wu, L.-F. (wlf6666@126.com) | 1600年 / Northeast University卷 / 28期
关键词：
Clustering algorithms - System theory;
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摘要：
The clustering method of panel data is studied. The 2nd order difference is used to substitute for the approximate 2nd derivative based on the grey convex relation for two dimension. The half positive characteristic of Hessian matrix is used to define the convexity degree. The similarity degree of objects is characterized by the convexity, the grey convex relation degree for three dimension is presented, and the properties of the grey convex relation degree for three dimension are discussed. An example is given to illustrate that the grey convex relation degree for three dimension can better reflect the correlation degree for three dimension panel data.
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