Shanghai Key Laboratory of Trustworthy Computing, East China Normal University, Shanghai 200062;
Department of Mathematics, The University of Texas-Pan American, Edinburg TX 78541, USA;
Shanghai Key Laboratory of Trustworthy Computing, East China Normal University, Shanghai 200062;
Department of Mathematics, The University of Texas-Pan American, Edinburg TX 78541, USA;
Suzhou Institute of Trade and Commerce, Suzhou 215000;