stochastic variable造句

• Dependent stochastic variable
  相依随机变量
• A new approach to prove the expectancy formula on the sum of stochastic variables
  随机多个随机变量之和的期望公式的一种新证法
• Computer simulation is known as an efficient method for dealing with stochastic variables in the inventory system
  仿真被认为是处理复杂库存系统中随机变量的有效方法。
• Firstly , the article introduces the theory of system simulation and the stochastic numeral and the stochastic variable
  本文首先介绍了系统模拟理论，以及产生随机数从而生成需要的随机变量的方法。
• By contrast , the paper calculated the reliability index of the abutment after changing variable quotiety of the stochastic variable
  作为对比，本文还在改变各随机变量变异系数的前提下，计算了坝肩岩体各高程的可靠指标。
• The theory of reliability is based on the probability . it considers the variability of all stochastic variable and use taut probability to measure
  可靠度理论是建立在概率论基础上，考虑了影响滑坡体稳定的各项随机变量的变异性，并用严格的概率来度量。
• The waste load is regarded as a stochastic variable following the log - normal probability distribution based on statistical data , and the constrains on water quality levels are expressed in a probability form
  假设排污量是服从对数正态分布的随机变量，并且以潮周期内水质达标的概率作为衡量控制点达标的依据。
• But as the ship structure system is very big and complicated , and there are many stochastic variables , not much progress have been made in application the structural reliability base on sfem to the ship structure
  但由于船舶结构体系庞大，随机变量众多，基于随机有限元的可靠度分析在船舶结构中应用缓慢。
• Under the consideration of the uncertainty of the water environmental system , both the observed data of the river water quality and the parameters for the river water quality model are processed as the stochastic variables herein
  摘要考虑到水环境系统的不确定性，把河流水质观测数据和水质模型参数都作为随机变量来处理。
• This paper is mainly concerned with the dynamic reliability of massive - head dam under earthquake . during the analyses , it considers the effect of variability 、 relevance and truncate of the stochastic variable
  本文主要研究在地震作用下大头坝的动力可靠性，在计算中还考虑了随机变量的变异，相关，截尾对其可靠度的影响。
• Then combined with reliability computation , the stochastic finite element method is used to establish the relationship between the load effect ( stress or force ) and basic stochastic variable dealing with statistical features of variables
  再与可靠度理论相结合，考虑变量的随机特性，通过随机有限元法建立荷载效应（如应力、内力等）与基本随机变量之间的关系。
• The equation of the structural limiting state can be expressed : z = r - s , thereinto r and s respectively are structural resistance and load response expressed with stochastic variables , we ca
  结构的极限状态方程可以表示为： z = r ? s ，其中r和s分别为用随机变量表示的结构的抗力和荷载响应，通过极限状态方程就可以得出结构的失效概率，或者是用可靠指标表示的结构的可靠度。
• For the uncertain character of material function , the intensity of spray concrete and concrete lining is uncertain too . it can describe quality character better by probability model and statistic parameter of stochastic variable
  由于材料性能具有不确定性，喷混凝土和二次衬砌的强度亦同样具有不确定性，一般用随机变量的概率模型和统计参数来描述，能更好地描述其质量特征。
• This paper proved that in the optimal models with stochastic variables , if the parameter estimation and the optimal solution are separated , the optimal result in practice is bound to be less than that in theory
  摘要证明了在涉及随机变量的最优化模型中，如果将参数估计和最优化求解过程分离，实际得到的最优化结果必然低于理论值，即参数估计在最优化模型中总是造成低效的结果。
• A class of strong convergence theorem for an arbitrarily adapted stochastic sequence without the non - decrease condition was established by using the truncation method of stochastic variables and the stop time
  摘要引入了随机变量的截尾和停时的概念，在定理条件及其证明过程中适当地定义随机变量的截尾和停时，并通过定义鞅差序列和利用鞅差序列的收敛定理，得到了一类关于任意随机适应序列的强收敛定理。
• A necessary and sufficient condition with ergodic of 1 - order probability distribution function of stochastic process ( theorem 1 and corollary 1 ) and extended the general distribution theorem of stochastic variable under the case of weakly condition ( theorem2 ) are presented
  摘要提出了随机过程一阶概率分布函数具有遍历性的一个充分必要条件（定理1和推论1 ） ，并在较弱条件下，对一般的关于随机变量函数分布定理作了进一步的推广（定理2 ） 。
• Define a random route , which pass through all the grid node , on the condition of given n conditional datum , get a value on the first grid node from the conditional distribution of stochastic variable , add the new value into the conditional datum as a new conditional data . on the condition of current n + 1 conditional datum , get a new value from conditional distribution of stochastic variable on the next node again . then continue until all the nodes gets own value
  定义一个经过所有网格节点的随机路径，在给定n个条件数据的情况下，在第一个网格节点处从随机变量的条件分布中抽取一个值，将这个新值加入到条件数据集中，在给定的n + 1个条件数据的情况下，在节点处从随机变量的条件分布中抽取一个值，重新进行，直到所有节点被模拟完为止。
• It has shown by the uncertainty of the data of fatigue experimentation and the size deviation of machine accessory and structure component and the original defect of materials that all of the stress and intensity and the factors that affect them are stochastic variables , so we should deal with the problem of fatigue by the method of probability and statistics to making the engineering life deduced by fatigue intensity to be the reliable life under a certain probability
  疲劳试验数据的离散性，零件和构件加工允许的尺寸偏差，材料中分布的原始缺陷，以及受载零件危险部位应力响应的分布特性等，都说明应力和强度以及影响它们的因素都是随机变量，它们有各自的分布形式，应该用概率统计理论和方法来处理，才能使疲劳强度在工程中所确定的寿命，成为保证某一概率下的可靠寿命。
• Based on the theory of stochastic finite element , the structural parameters of frame - shear structure including stiffness and mass and damping are simulated to be stochastic variables . by solving recurrence equation of stochastic finite element , the duration curve of mean value and standard deviation of seismic response can be obtained for every floor of frame - shear structure . an analysis is thus given to the effects of independent variation and simultaneous variation of structural parameters on the seismic dynamic response of frame - shear structure . as shown by the results , with regard to frame - shear structure , the effect of variation of strucural parameters on the change of mean value are chiefly the increase of standard deviation of response . variation of stiffness will cause the response of frame - shear structure to variate greatly ; variation of mass shows less effect ; and variation of damping shows insignificant effect . the effects of simultaneous variation of various structral parametres on seismic response are only slightly greater than the effect of stiffness variation alone
  以随机有限元理论为基础，将框剪结构的刚度、质量、阻尼等结构参数为随机变量.通过求解随机有限元的递推方程，得到框剪结构各层的地震动力响应均值和标准差历时曲线.分析结构参数单独变异，以及同时变异对框剪结构地震响应的影响.研究结果表明,对框剪结构而言，结构参数的变异对响应的均值变化影响都不大，主要是增大响应的标准差.刚度的变异性将引起框剪结构的响应发生大幅度变异，质量的变异性影响稍小，阻尼的变异性影响不显著.结构各参数的同时变异，对框剪结构地震响应的影响，仅比刚度单独变异的影响稍大