提出了可以考虑初始缝隙和切向剪切滑动的“剪切滑移模型”，可以用于模拟结构与相邻物体之间接触面的力学特性。
A model named shear slide model is presented, which can be used to simulate the mechanical property of the contact surface between the structure and its adjacent object.
变异操作模拟自然界生物体进化中染色体上某位基因发生的突变现象，从而改变染色体的结构和物理性状。
The mutation operator is to produce a child from a parent individual by change the value of the specific position.
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