随机

In this dissertation, two methods were adopted to build dynamics model for vehicle ride comfort analysis: one is eight freedom vehicle ride comfort differential equation model in which lateral movement of driver and vehicle body was considered. Combined with time domain model of random road input, we got the driver and vehicles moving displacement.

本文采用两种方法建立了车辆平顺性分析的动力学模型：8自由度车辆平顺性分析的微分方程模型，考虑了驾驶员和车体的侧倾，结合随机路面激励的时域模型，在B级路面输入条件下，进行了时域仿真求解，得到车辆和驾驶员在汽车坐标系中各个方位上随时间历程的运动位移；利用ADAMS软件建立的福田小卡汽车，共计596个自由度的三维实体整车虚拟汽车模型，全面地考虑了影响平顺性的各种因素，然后通过对路面功率谱的变换生成适合于ADAMS／Tire的路面文件，实现了整车虚拟样机在随机输入激励下，车辆振动模型的时域仿真求解。

In this dissertation, two methods were adopted to build dynamics model for vehicle ride comfort analysis: one is eight freedom vehicle ride comfort differential equation model in which lateral movement of driver and vehicle body was considered. Combined with time domain model of random road input, we got the driver and vehicle's moving displacement. The other method, we built a Forland truck virtual prototyping using ADAMS, it is a 3D machine model, totally with 596 freedom degrees, every factor that influences the vehicle ride comfort was considered, finally complete the time domain simulation on random road input.

本文采用两种方法建立了车辆平顺性分析的动力学模型：8自由度车辆平顺性分析的微分方程模型，考虑了驾驶员和车体的侧倾，结合随机路面激励的时域模型，在B级路面输入条件下，进行了时域仿真求解，得到车辆和驾驶员在汽车坐标系中各个方位上随时间历程的运动位移；利用ADAMS软件建立的福田小卡汽车，共计596个自由度的三维实体整车虚拟汽车模型，全面地考虑了影响平顺性的各种因素，然后通过对路面功率谱的变换生成适合于ADAMS/Tire的路面文件，实现了整车虚拟样机在随机输入激励下，车辆振动模型的时域仿真求解。

Always try to test out how much you can push parameters that will create variations in your hair such as: rand scale, hue / value variation, frizz tip, randomize etc'.

要试着测试你能操控的所有属性，这给你的头发带来变化，例如：随机缩放，色彩/强度的变化，末端卷曲，随机排列等等。

A function of a random variable is itself random in general.

一个随机游走的函数其本身也是随机的。

Then the stability of the linear complexity of the generalized self-shrinking sequences is investigated by some theories of the Galois field,in which the linear complexity of the periodic sequences obtained by either deleting or inserting one symbol and substituting small symbols within one period are discussed.

1引言伪随机序列在序列密码、扩频通信等领域有着极为广泛的应用。周期与线性复杂度的稳定性是衡量序列伪随机性质的一个重要而方便易行的指标。

In test data modeling, the test data distribution was analyzed, the models of these data were set up respectively based on the hypothesis of Gaussian stationary process and non-Gaussian process.

对试验数据建模时，根据对火控动态精度误差数据的分析，分别基于高斯平稳随机假设和非高斯随机假设建立AR模型，两种模型性质不同，后者采用高阶累积量估计模型参数。

Firstly, the descriptions of Instantaneous Polarization Projection Sequences of signal and noise are presented and statistics of generalized distance between random EM wave and the anticipant signa are derived.

首先给出了目标散射信号和随机极化波的瞬态极化投影序列表征方法，导出了随机极化波的IPPS到期望点广义距离的统计特性。

The dissertation focuses on performance gradient estimation and SRO algorithm of DES aswell as other related topics,such as modeling of DES and discrete event simulation,performancemeasure Hessian matrix estimation,Stochastic Approximationand so on.General Semi-Markov Processis adapted to describe behaviour of DES and discrete eventsimulation.A general result is obtained and applied to analyze strong consistency of performancegradient Perturbation Analysisestimator.Conditions for effectiveness of InfinitesimalPerturbation Analysisare also discussed.New PA algorithms,such as server PA,PA usingDirac generalized function,job sequence PA etc.,are proposed to deal with discreteparameters.Furthermore,strategies of combining PA algorithms with certain iterative rules areanalyzed widely in order to optimize DES parameters and some SRO algorithms are constructed toslove DES optimization problems.

论文将DES性能分析领域中性能梯度估计和单运行仿真优化作为主要的研究对象，探讨了与性能梯度估计有关的DES和离散事件仿真过程建模、高阶导数估计以及随机逼近等理论和方法；建立了具有一般性的DES和离散事件仿真的广义半Markov过程模型；获得了分析性能梯度估计量强相合性的理论结果和无穷小摄动分析算法应用的条件；提出了诸如服务台数目的摄动分析、奇异摄动分析、串联生产线和加工车间中工件加工序的摄动分析等一系列摄动的思想和算法，对连续参数和离散参数都进行了深入的研究；对摄动分析算法同优化规则结合实现仿真优化的策略也进行了广泛的分析，构造了新型的变界截尾的随机逼近算法，并用于DES的单运行仿真优化研究；最后，给出了DES性能分析方法的实证性研究结果。

Tones, given the series of six generating formula, random from the series were selected as a game of this round of the series, and from the series of randomly selected to three consecutive elements, which users guess the next series is one element of what?

猜数字，给定六个数列的生成公式，随机地从上述数列中选取一个作为本轮游戏的数列，并从该数列中随机地选取连续地三个元素，请用户猜该数列的下一个元素是什么？

The table look-up method is used for rapidly generating an independent Gaussian random series, which simulates the heat noise of the fuze.

用查表法快速产生独立高斯随机数列，模拟引信的热噪声，通过低阶递归型高斯数字滤波器产生引信杂波随机数列，对它们进行了统计检验和谱估计。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。