Institution: | 1. Department of Mathematics, Jinhua Polytechnic, Western Haitang Road 888, 321017 Jinhua, China;2. Department of Mathematics, Zhejiang Normal University, Yingbin Road 688, 321004 Jinhua, China;3. Hangzhou Weike software engineering Co. Ltd., Western Wenyi Road 998, 310012 Hangzhou, China |