Affiliation: | 1. Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450011, China;2. Institute of Data and Knowledge Engineering, Henan Key Laboratory of Big Data Analysis and Processing, Henan University, Kaifeng 475004, China;1. School of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350117, China;2. Department of Mathematics and Physics, Fujian Jiangxia University, Fuzhou 350108, China |