Institution: | 1.Department of Mathematics and Information Engineering, Dongchang College, Liaocheng University, 105 Huanghe Road, Liaocheng Economic Development Zone, Liaocheng, 252000, Shandong, China ;2.Software College, Shenyang Normal University, No.253, HuangHe Bei Street, HuangGu District, Shenyang, 110034, Liaoning, China ; |