Abstract : in this paper , monte - carlo method is applied in the probability analysis of settlement for the first time . some specific problem in this method are discussed , and the settlement probability results are also analysed . this is meaningful for the probability analysis problem of settlement and the application of monte - carlo method in other engineering 文摘:在沉降概率分析中首次引入的蒙特卡罗法，对计算过程中的一些具体问题进行了较详细的阐述，对沉降计算结果进行了分析，它们对沉降问题的概率分析以及其它工程问题的蒙特卡罗计算有一定的意义
The theoretical analysis of large cryocondensation pump for nbi was mainly concerned . this paper emphasized on analyzing and calculating the heat load of cryocondensation pump , simulating thermal transmission coefficient and molecule transmission coefficient of radiation baffle according to monte carlo method , analyzing the process on cryo - surface and the factor of affecting pumping speed and hydrogen layer thickness of influencing cryo - parameter , etc . finally by verifying the pumping speed on large cryocondensation pump for neutral beam injection system , the pumping speed of 4 . 0x105l / s ( for h2 ) was proven to be reasonable 本文首先介绍了中性束注入系统的国内外发展状况，阐述了中科院等离子体所ht - 7中性束注入系统的构成，主要对用于中性束注入系统的大型低温冷凝泵的特性进行了理论分析；对冷凝抽气面的热负载进行了分析计算；用蒙特卡罗法对辐射挡板的分子传输几率与热传输几率进行了模拟计算；研究了低温表面的处理方法对抽速的影响以及氢层厚度对各低温参数的影响；最后对用于中性束注入系统的大型低温冷凝泵的抽速进行了验证，得出的结论是：选取40万升秒的抽速是合理的。
