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机构:
E China Univ Sci & Technol, Sch Sci, Dept Math, Shanghai 200237, Peoples R China
E China Univ Sci & Technol, Sch Business, Dept Finance, Shanghai 200237, Peoples R China
E China Univ Sci & Technol, Res Ctr Econophys, Shanghai 200237, Peoples R China E China Univ Sci & Technol, Sch Sci, Dept Math, Shanghai 200237, Peoples R China