这是一本系统讲述离散事件系统仿真与建模的专业电子书籍，对于从事随机系统的仿真，比如电梯群控算法的仿真设计，有很大帮助．-This is a system on the discrete event system simulation and modeling of professional e-books, for the simulation of stochastic systems, such as the elevator group control algorithm simulati

一种混凝土骨料三维随机投放模型，为混凝土细观力学研究提供一种快捷的三维建模源代码。(A three-dimensional random delivery model of concrete aggregate provides a fast 3D modeling source code for concrete micromechanics research.)