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作者:

Liu, Chao (Liu, Chao.) (学者:刘超) | Xie, Jing (Xie, Jing.) | Zhao, Qi (Zhao, Qi.) | Xie, Qiwei (Xie, Qiwei.) (学者:谢启伟) | Liu, Chenqi (Liu, Chenqi.)

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摘要:

The financial liberalization and globalization have increased the need for expert and intelligent systems to deal with credit risk management works. Clustering algorithms are widely used for knowledge acquisition in such systems to assess the credit risk from a data point of view. Conventional clustering algorithms fall short in credit risk assessment because credit datasets are typically high-dimensional, class-imbalanced, and with large sample size. To address these problems, this paper proposes a novel evolutionary multi-objective soft subspace clustering (EMOSSC) algorithm for credit risk assessment. Firstly, we develop a soft subspace clustering validity index for credit risk assessment, by which we can detect the underlying subspace for each cluster from the entire high-dimensional feature space, and we also incorporate the weight of each cluster and the between-cluster separation into the clustering validity index to obtain a comprehensive data structure in the clustering process. Secondly, we propose to optimize the clustering criteria of the new clustering validity index simultaneously by a multi-objective evolutionary algorithm without any predefined weighting coefficients, which guarantees the robustness of the algorithm. We also further provide a local search strategy which significantly accelerates the convergence of the algorithm. Thirdly, we design a GPU-based parallel computation framework for updating the weights of features in our proposed algorithm to improve the computational efficiency on credit datasets with large sample size. Finally, we conduct a comprehensive experiment, with its results demonstrate the superiority of our proposed algorithm in credit risk assessment. (C) 2019 Elsevier Ltd. All rights reserved.

关键词:

High-dimensional data Credit risk assessment Evolutionary multi-objective algorithm ASEA Soft subspace clustering

作者机构:

  • [ 1 ] [Liu, Chao]Beijing Univ Technol, Coll Econ & Management, Beijing 100124, Peoples R China
  • [ 2 ] [Xie, Jing]Beijing Univ Technol, Coll Econ & Management, Beijing 100124, Peoples R China
  • [ 3 ] [Zhao, Qi]Beijing Univ Technol, Coll Econ & Management, Beijing 100124, Peoples R China
  • [ 4 ] [Xie, Qiwei]Beijing Univ Technol, Coll Econ & Management, Beijing 100124, Peoples R China
  • [ 5 ] [Liu, Chao]Modem Mfg Ind Dev Res Base Beijing, Beijing 100124, Peoples R China
  • [ 6 ] [Liu, Chenqi]Dickinson Coll, Dept Math & Comp Sci, Carlisle, PA 17013 USA

通讯作者信息:

  • [Xie, Jing]Beijing Univ Technol, Coll Econ & Management, Beijing 100124, Peoples R China

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来源 :

EXPERT SYSTEMS WITH APPLICATIONS

ISSN: 0957-4174

年份: 2019

卷: 138

8 . 5 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:136

JCR分区:1

被引次数:

WoS核心集被引频次: 15

SCOPUS被引频次:

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 2

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