在机车车辆动力学中，用matlab获得轮轨接触点-get the contact point of wheel and rail

重力四子棋程序，通过人工智能中的alpha-beta剪枝实现，AI的实力至少高于一般人的水平，人比较难下赢。通过调用getPoint函数获得下一个落子点的坐标-Gravity four chess program, through the realization of artificial intelligence in the alpha-beta pruning, the strength of AI at least a greater than average level, people