Integrating factors and conservation theorems for variable mass nonholonomic Vacco dynamical systems;

Mei symmetry, Noether symmetry and Lie symmetry of a Vacco system;

Simulation of water quality for Songhua river water pollution accident using a one-dimensional water quality simulation model based system dynamics.;

Study on the Simulation Model of System Dynamics for Mining Areas' Economy;

Dynamic model of sustainable development of coal industry based on system dynamics;