随机

According to the standard and request of mechanical structures for electronic equipment tests, the finite element model of the electronic equipment cabinet was built by using the software of finite element analysis-ANSYS and simulated the tests of random vibrations by loading and calculating. The 3-D isopleths graph of deformation and stress of the cabinet was obtained. It could confirm the maximum of deformation and stress of the cabinet and probability of occurrence. Through more analysis of the frequency response curve reflected directly and clearly the deformation of the cabinet within the particular seismic frequency.

根据电子设备机械结构随机振动试验的标准和要求，采用有限元分析软件ANSYS建立电子设备机柜结构的有限元模型，通过加载求解对其进行随机振动试验的数值模拟，得到机柜有限元模型的三维变形和应力等值线图，进而确定机柜承受应力和变形的最大值及发生概率；通过对频率响应曲线的进一步分析，可以直观明了地反映出机柜承受一定频率范围地震下的变形情况。

The maximum entropy principle is utilized to calculate the probability of stochastic rays undergoing k reflections.Finally,the applications of stochastic rays are investigated: the...

最后介绍使用随机射线建模超宽带室内信道的多径传播轨，在此基础上可以得到信道特性建模的基本随机变量，以及无线电波传播的概率模型等应用。

The general-purpose methods for random-vector generation are presented and then followed by a review of existing methods for generating random vectors with known marginals.

接著，讨论与分析各种通用的随机向量产生方法，并针对仅已知边际分布此特殊情况的随机向量产生方法加以探讨。

Methods According to the random sampling, 100 foot-bath massagists were selected from 30 foot-bath saloons in Changning District, the analysis suggested that hygienic conditions in beauty parlors took a turn for the better, and at the same time, those who work in beauty parlors began to apply hygienic knowledge to their routine duties after the multiple interference.

方法采用随机抽样方法，从长宁区30家足浴房随机抽取100名足浴按摩师进行综合干预，并对他们的卫生知识知晓率及卫生行为合格率作干预前后比较。

Based on the theoretical model coupling Maxwells equation with the rate equation of 4 level inverted population, the numerical simulation is made via the FDTD method and MATLAB programs. The simulation results show that 1. With the increase of the pumping rate, both the localization of the electric field and the spectrum mode numbers will change; 2. The lasing threshold decreases by increasing the size or concentration of the scatters; 3. The lasing threshold also decreases by increasing the size of samples or strengthening the sample randomness.

在理论和实验研究的基础上，利用麦克斯韦方程与四能级反转粒子数的速率方程相耦合的理论模型，采用时域有限差分方法和MATLAB程序对随机激光泵浦阈值特性进行了数值模拟与计算，模拟结果显示：随着泵浦速率的增大，出现了阈值前后电场强度局域态及频谱模式数的改变；随着散射体粒径的增大，浓度的增大，阈值呈现下降的趋势；随着样品长度的增大，随机强度的增强，阈值也呈现下降的趋势。

The mid-position of a plant xj can be given as a fixed parameter or may be altered randomly each time step using the parameter xx to initialise the randomiser see switch "SpatialDistribution" random vs.

植被的中间位置 xj 可作为固定参数给出，或者用参数 xx 初始化随机值，在每个时段随意改变它见开关&空间分布&随机

To sample high speed random signals without drop,a design of O-shaped high speed random signals acquisition card based on the CPLD and its realization are presented.

0引言随着科学技术的发展，人们对随机信号采集的要求越来越高，不仅要求对随机信号不无遗漏的采集，而且要求很高的采集速度，以求获得尽可能多的信号信息。

Monte Carlo is a method that approximately solves mathematic or physical problems by statistical sampling theory. When comes to Bayesian classification, it firstly gets the conditional probability distribution of the unlabelled classes based on the known prior probability. Then, it uses some kind of sampler to get the stochastic data that satisfy the distribution as noted just before one by one. At last, it can obtain the posterior probability distibution of each unlabelled classes by analysing these stochastic data.

蒙特卡罗是一种采用统计抽样理论近似求解数学或物理问题的方法，它在用于解决贝叶斯分类时，首先根据已知的先验概率获得各个类标号未知类的条件概率分布，然后利用某种抽样器，分别得到满足这些条件分布的随机数据，最后统计这些随机数据，就可以得到各个类标号未知类的后验概率分布。

The Doppler effect of moving scatterers causes the radar signals to appear as stochastic processes. Some useful knowledge about the clouds and precipitations can be obtained by analysing the statistical characteristics of these processes.

运动质点的多普勒效应使它们散射的雷达信号呈现为一种随机过程，对这随机过程的统计特性进行分析就能够推断云和降水的微物理或运动学的状况。

The fuzzy-stochastic finite element methods are roundly studied.Based on the different resolvents of fuzzy information,three kinds ofrecursive equations are derived.

全面研究了模糊随机结构的有限元分析方法，并依据不同的模糊信息处理方法推导了三类模糊随机有限元的递归列式。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。