Affiliation: | (1) Geomathematical Research Institute, China University of Geosciences (Wuhan), 430074 Wuhan, China;(2) Present address: Department of Fundament, Xi'an Petroleum Institute, 710061 Xian, China;(3) Department of Computer Science, Xi'an Petroleum Institute, 710061 Xian, China;(4) Department of Mineral Resources, China University of Geosciences (Wuhan), 430074 Wuhan, China |