In this paper , by using monte carlo method with irregular grid random walk in time - space domain the problem of mass concrete transient temperature field was solved 摘要利用求偏微分方程的蒙特卡罗算法，通过在时空域中不规则网格随机游动来求解大体积混凝土不稳定温度场。
Frb had abandoned the traditional random walk and simple rules , but carried out the neutral rules to achieve the economy growth and price stability with casual steps 美联储摒弃传统的相机抉择或简单单一规则，选择以严谨的方式来实现经济增长与物价稳定的“中性货币政策” 。
Solomon ( 1975 ) introduced the concept of random walk in a random environment , proved the existence of the model on the set of integers , and obtained its limit theorems Solomon ( 1975 )引进了随机环境中随机游动的概念，在整数集上证明了该模型的存在性，并得到了它的极限定理。
These measures include random walk model , industry model , mean - reverting model , jones and modified - jones models , k - s model , margin model and so on 应计利润模型主要包括随机游走预期模型、行业模型、平均数回复模型、琼斯及其扩展模型、 k - s模型、边际模型和营运资金模型等。
Time series from stock exchange has the following characteristics . first , it appears to be a random walk but may be not totally random . second , it is easily and almost costlessly available 股市时间序列具有以下两个特性：首先，它貌似随机但又好像不完全随机；其次，它非常容易获得。
