查询词典 stochastic dynamic programming

Finally, the dynamic characteristics of a full-size flat plate subject to the actual dynamic loads are predicted from those of a scale plate models subjected to the scale dynamic loads and the associated scaling rules.

最后，便可以利用比例法则以及缩小平板承受缩小外部负载时的动态特性，精确的预测原型平板模型承受实际外部负载时的动态行为。

With CAE analysis, multi-body dynamic model of the loader is established with multi-body dynamics software of finite element NAS-TRAN and MSC Adams/View during design period. Various curve functions are added in dynamic analysis model to simulate the terrain excitation on tires and conduct dynamic calculation and analysis. Stress change vs. time of each part is easily obtained when a loader travels on rough terrain. Compared with test results of the physical prototype, the calculation results are relatively consistent.

利用CAE分析手段，在产品的设计阶段，利用有限元NASTRAN和MSC Adams/View多体动力学软件建立装载机的多体动力学模型，通过在动力学分析模型上加入各种曲线函数来模拟路面对轮胎的激励，进行动力计算分析，很容易获得装载机在通过不平路面时各部件应力随时间的变化值，并将其计算结果与物理样机的测试结果进行对比，两者的结果比较一致。

Firstly, two examples, which belong to static analysis and dynamic analysis respectively, were given to show the effectiveness of discrete element method. Then the discrete element method was used to perform dynamic analysis of the Chinese 1 km deep-ocean mining system. The dynamic performance of the entire mining system under different current directions was discussed and compared with that from finite element method.

首先，从静态分析和动态分析两方面，给出2个典型算例，证明该方法的有效性；然后，将离散元方法用于中国1 km深海采矿系统的动力学分析，讨论不同海流方向下整体系统的联动性能，并与有限元方法进行对比。

The dynamic power_adaptive technique has broken the tradition of the static architecture design in the microprocessor field. It offers a power_adaptive mechanism for key hardware resource on the chip. By analyzing the demand of applications through software, the dynamic power_adaptive technique can offer hint information to hardware, make reconfigurations of the hardware sources according to the change of the demand, and close unnecessary or invalid redundant resources. On the premise of guaranteeing performance, the dynamic power_adaptive technique always serves the present application with the most suitable resource, so as to achieve the goal of saving consumption.

动态低功耗自适应技术打破了微处理器设计中静态体系结构设计的传统，为芯片上关键的硬件资源提供一种动态低功耗自适应机制，通过软件分析应用需求，并向硬件提供指示信息，使得硬件资源根据应用需求的变化动态调整，关闭不必要的或者无效空转的冗余资源，在保证性能的前提下，总是以最合适的资源服务于当前应用，从而达到节省功耗的目的。

Analyzing the dynamic behavior of dislocations in the deformed metal at high temperature and high strain rate, a new theoretical model of dislocation dynamic behavior is put forward to describe the dynamic recrystallisation mechanism of the weld metal.

采用本文首次提出的测量摩擦界面温度的半自然热电偶测温法，并结合焊接过程中的急冷凝结组织分析、微区应变速率分析，以及摩擦扭矩测量等相关实验方法，测定了焊接过程中焊合区金属的组织及相应的热变形参数。

In engineering application, we think that the rock laboratory experiments may simulate and reshow rock bursts considering the conditions of coupled static-dynamic loads and rock burst and their comparison. Energy demand of rock burst occurring is revealed through analyzing energy transition of rock failure process under coupled static-dynamic loads. At the same time, the rule of energy utilization under coupled static-dynamic loads is discovered; the measures for rock cracking by utilizing high stress condition in deep rock mass and energy utilization improving are found.

在工程应用方面，将动静组合载荷下岩石受力条件和岩石发生岩爆的条件及两者发生的现象进行了对比，认为室内动静组合加载试验可以模拟再现现场发生的岩爆，并通过分析动静组合载荷下岩石破坏过程中能量的转化来揭示岩石发生岩爆的能量要求，而且发现了动静组合加载能量利用的规律，找到提高能量利用率的措施和利用深部岩体受力状况来致裂岩石的手段。

Using fluid dynamics FEM (two dimensional, three dimensional andaxisymmetric) and three dimensional acoustic FEM in meticulous analysis ofexpansion muffler structure, this paper studies the influences of each mufflercomponents' position, dimension, form and quantity on the fluid dynamic andacoustic performances;therefore the paper indicates that the end of the intruding tubeis the linchpin of the fluid dynamic performance of the whole muffler structure, thespringhead of muffler fluid dynamic performance is the smoothness of air current, themain factor which affects the acoustic attenuation value of expansion chamber muffleris the grade of saltation of the section of air conducting access, and the attenuationvalue of specific frequency can be dramatically enhanced by carefully designing thelength of expansion chamber.

本文通过流体力学有限元方法和三维声学有限元方法对扩张腔消声结构的参数化模型进行了细致的分析，研究了这种结构的各个组成部份的位置、大小、形状和数量对其流体力学与声学性能的影响，指出插入管端口是影响整个结构流体力学性能的关键，消声结构流体力学性能的根源是气流通过时的平稳程度；影响扩张腔消声量的主要因素为声波传播通路截面突变的程度，并可以通过精细的设计扩张腔轴向长度获得宽频或指定频率消声量的大幅度提高。

Stochastic Petri Nets has good ability for dynamic analysis of concurrency, asynchronism and uncertainty of systems. It is particularly suitable for system modeling and dependability analysis.

随机Petri网对系统的并发性、异步性和不确定性具有很强的动态分析能力，特别适合系统建模和可信赖性分析。

At firstly assuming shear modulus is linear along depth, introducing differentiating operator of structure and using the stochastic vibration theory of continuative linear system, this paper studies the dynamic response problem of non-homogenize site soil.

首先假定土层的剪切模量随深度线性变化，引入结构微分算子，利用连续线性系统的随机振动理论，研究了非均匀场地土层地震的动力反应问题。

Many investigations show that randomicity of structures?parameter will bring large value of stochastic dynamic response of structures. Randomicity of structures?mechanics parameter may be dominant factors. Therefore, introduction of randomicity into system model of structure and using random system model are more reasonable than that of determinate system model. The work in this dissertation mainly consists of two parts.

众多的研究工作表明，结构参数的随机变异性可以引起结构随机动力响应的大幅度涨落，结构力学参数的随机性还可能成为主导因素，在结构系统模型中引入随机性的概念，采用随机结构系统模型是较确定性结构系统模型更为合理的一种选择。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。