查询词典 stochastic

In general, stochastic approximation is guaranteed to converge.

在一般的情况下，随机近似方法的收敛效果是受到肯定的。

In accordance with discrete, non-symmetry and time-delay feedback neural networks, we provide some theoretical criteria to judge the stability for designing the networks. On continuous feedback networks, we built an algorithm to estimate the convergence region. On the HNN feedback networks, an effective optimization algorithm based on the annealing strategy and the chaotic neural network is presented, and some disciplinary conclusions are provided to guide the selection of parameters. Simulation results on benchmark problems demonstrate that the performances of our algorithm are distinctly superior to those of the classic HNN based on gradient descend and stochastic optimization methods based on probabilistic distribution.

针对离散、非对称和时延等三种类型的动态反馈网络，给出了可用于网络设计的稳定性判别准则；针对连续动态反馈网络，建立了其收敛域估计的一个算法；针对以HNN模型描述的动态反馈网络，基于退火策略和混沌神经网络提出了一种高效的优化算法，建立了可用于指导参数选择的一些规律性结论，对典型算例的仿真研究显示，改进算法在各类性能上相对基于梯度下降的传统HNN模型和基于概率分布的随机优化算法，具有明显的优越性。

Chapter 3 studied Monte Carlo methods to four special classes of the stochastic non-smooth convex programming.

第3章研究了四种随机非光滑凸规划问题的Monte Carlo近似法。

In this paper, we consider the optimal control problem of time-delayed forward-backward stochastic system when control set is convex.

本文研究了在控制集为凸集的情况下带时滞的正倒向随机控制系统的最优控制问题。

Via the stochastic averaging method, the four-dimensional system is reduced to a two-dimensional one. Through the logarithmic polar transformation , and then Girsanov theorem and Feynmann-Kac formula, the backword differential operator is then obtained. By expanding the eigenfunctions as a Fourier cosine series, the approximate analytic expansion of the moment Lyapunov exponent is then obtained.

首先在经典二元机翼颤振方程加入随机激励，通过随机平均法，Girsanov定理和Feynmann-Kac公式得到关于矩Lyapunov指数的特征值问题，其次采用Fourier余弦级数对特征函数进行正交展开得到系统矩Lyapunov指数的近似解析式。

Based on product moment of normal random variable cariable calculating covariance function of square of normal stochastic process has been given.

在正态随机变量乘积矩基础上，给出了正态随机过程平方后的协方差函数的计算。

Some fundamental properties of fuzzy probability characteristic, such as the fuzzy mean value function, fuzzy covariance function and fuzzy variance function of fuzzy stochastic processes are proved.

3研究了实模糊随机变量的数学期望、方差等模糊概率特征的基本性质以及计算方法，并且讨论了实模糊随机变量的独立性与分析运算的若干基本性质

The numerical analysis method is used to study the ground movement laws caused by the ovalization variation in the cross section in the action of water and soil pressure of tunnel lining.Based on the stochastic medium theory,this paper suggests the method for calculating this ground movement caused by tunnel ovalization deformation.

采用数值分析方法研究了隧道衬砌在土水压力的作用下，断面所产生的椭圆化变形引起的地层位移规律，并基于随机介质理论，给出了计算隧道椭圆化变形引起地层位移的方法。

The simulation showed that the intrinsic stochastic open process of CRUs can fully explain the above phenomenon.

为了进一步研究这种随机性产生的内在机制，构建了一个数值模型对心肌细胞中的钙波进行模拟。

The current sensitivity probability density function of energetic materials was deduced based on Frank-Kamenetskii parameter and resistance supposing as stochastic variable of normal distribution, by the application of the probability density formula of function in two random variables.

将Frank-Kamenetskii参数和电阻假设为正态分布的随机变量，应用二维随机变量函数的概率密度公式，推导出了含能材料电流点火感度的概率密度函数。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。