Chunrui Zhang received her Ph.D. degree in mathematics from the Harbin Institute of Technology. She is a professor in the Department of Mathematics, Northeast Forestry University. Her current research interests include differential equations, dynamical systems and mathematical biology. Correspondence address: School of Science, Northeast Forestry University. No. 26 of Hexing Road, Harbin City, Heilongjiang Province, China.
Chunrui Zhang received her Ph.D. degree in mathematics from the Harbin Institute of Technology. She is a professor in the Department of Mathematics, Northeast Forestry University. Her current research interests include differential equations, dynamical systems and mathematical biology. Correspondence address: School of Science, Northeast Forestry University. No. 26 of Hexing Road, Harbin City, Heilongjiang Province, China.