密度 1.(密集的程度) density; thickness 火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) density 电流密度 current density; 海水密度 seawater density; 水银的密度比水大得多。 mercury has a much greater density than water.; 密度计 densimeter; densitometer; density gage; density indicator; gravitometer
They are expanding model of the bomb body , bursting model of the bomb body and motion model of the fragments . according to the models , the paper gives a detailed algorithm for the whole process of the bomb explosion . ( 7 ) based on the explosion mechanism and the stochastic characteristic of the shell , the paper advances some reasonable hypotheses and supposes that the explosion process of the shell is a markov process , thus constitutes two explosion models of the shell : the imitation model an (刀从爆炸的机理出发,利用合理的假设,将壳体的爆炸过程处理为马尔可夫过程,把爆炸的机理同爆炸的随机性联系在一起,建立了壳体爆炸的两种模型:仿真模型和简化模型,提出了破裂程度的倍密度函数和破裂方向的倍密度函数两个概念,得到了基于半边结构的虚拟壳体爆炸过程中任一条边出现裂缝的概率公式。