1.School of Information Engineering, Southwest University of Science and Technology, Mianyang 621000, China; 2.Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Mianyang 621000,China; 3.School of Information Engineering, Mianyang Teachers’ College, Mianyang 621000, China; 4.Sichuan HYHZ Tech. Co., Ltd., Mianyang 621000, China
TP391.41;TN05