Affiliation: | 1. State Key Laboratory of Enhanced Oil Recovery, Beijing, 100083, China 2. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China 3. Department of Mathematics, Penn State University, University Park, USA 4. School of Mathematics and Computational Science, Xiangtan University, Xiangtan, Hunan, 411105, China 5. Academy of Mathematics and System Sciences, Beijing, 100190, China
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