查询词典 dynamic equilibrium

An equal cross-section blade was investigated and a finite element model was built parametrically. Geometrical parameters (such as length, width and thickness), material parameters (such as young's modulus and density) and speed of blade were considered as input random variables while the static frequencies and dynamic frequencies were output random variables. Combining the finite element method, response surface method and Monte Carlo method, the statistical properties and cumulative distribution functions of static frequencies and dynamic frequencies were obtained. Probability sensitivities analysis, which combined the slope of the gradient and the width of the scatter range of the random input variables, was applied to quantitatively evaluate the sensitivities of static frequencies and dynamic frequencies with respect to the random variables. The Scatter plots of structural responses with respect to the random input variables were illustrated how to adjust the values of the static frequencies and dynamic frequencies by changing input random variables.

文中以某试验台用汽轮机等直叶片为研究对象，考虑几何参数、材料参数和转速的随机性，通过有限元参数化建模，将确定性有限元方法、响应面方法和Monte-Carlo模拟法相结合，从而获得了叶片静频、动频的统计特性和累积分布函数；同时考虑随机变量的梯度和离散范围对静、动频的影响，通过概率敏感性分析，定量地判断出叶片静、动频对随机输入变量的敏感性；通过绘制叶片静、动频与输入变量的散点图，定量地分析了如何改变随机变量以调整静、动频率的方法。

2Aim to the instance of AJiuTian hydropower project, on the basis of thedeep analysis for system exploitation, surrounding three goal of hydropowerengineering, the management and control system of dynamic visual information forhydropower engineering is developed. The development of method of schedulemanagement and control system, investment management and control system, qualitymanagement and control system, engineering three-dimension dynamic visualsimulation, engineering geology three-dimension dynamic visual simulation areadvanced, management and control of dynamic visual information for hydropowerengineering faced construction scene is realized, which provide manager with fast,exact decision-making support.

2紧密结合云南苏帕河阿鸠田水电工程的具体情况，在分析系统开发思路及原则的基础上，围绕水电工程项目管理的三大目标，研制开发了阿鸠田水电工程可视化动态信息管理与控制系统，提出了工程进度管理与控制系统、工程投资管理与控制系统、工程合同管理系统、工程施工三维动态可视化仿真系统、工程地质三维可视化模拟系统等多个子系统的功能设计及实现方法，实现了直接面向施工现场的工程动态信息的可视化管理与控制，为管理人员提供迅速准确的决策支持。

This paper put forward the non-equilibrium、 heterogeneity、 anisotropism three dimensional dynamic model of the coalbed methane transport and the theory and method of using the dynamic model to assess and forecast the output of the coalbed methane for the first time, and achieves good result.

本文首次提出了煤层甲烷运移的非平衡非均质各向异性三维动力学模型及其应用动力学模型评价、预测煤层甲烷气产量的理论与方法，取得了良好的效果。

Based on the equilibrium equation of an arch element the cubic nonlinear dynamic model with second order is established and the nonlinear differential dynamic system without constant term is obtained through a transfer process of T=U+b. Hence three fixed points and the homoclinic orbits are found. The critical condition of the chaotic vibration of the elastic arch is given by using the method of Melnikov function. The numerical results of the stationary and chaotic motion are given and discussed.

首先利用拱的单元平衡方程建立了拱的二阶三次非线性动力学模型；然后通过变换使方程转化为不含常数项的非线性微分动力系统，并由此得到无扰动系统的3个不动点与同宿轨道；再用Melnikov函数法给出了发生混沌的临界条件；最后给出了该系统出现定常运动和混沌运动的数值结果。

Austria school thinks that equilibrium is dynamic, and competition is dynamic also.

奥地利学派认为均衡是动态的，竞争也是动态的。

The relation of interfacial adsorption equilibrium in the solution system was respectively tested and calculated with Gibbs equation and dynamic method .The conclusion showed that (1) the experiment result of dynamic method with was highly in coordination with the value which from theoretical calculation.(2) The surfactant molecule was in arrangement of monomolecular layer at the gas-liquid interface.

用吊环法测定了十二烷基硫酸钠水溶液不同浓度与其界面张力的关系，拟合得到的回归方程为σ=-0.9523 ln ~2C-24.534 ln C-81.411，同时还测得其临界胶束浓度值CMC为6.5×10~(-3M，运用吉布斯等温方程和动态法分别计算和测定了该溶液系统的界面吸附平衡关系，结论表明：(1)动态法测定结果基本吻合吉布斯方程的理论计算；(2)表面活性剂分子在气—液两相界面是以单分子层形式定向有序排列的。

In order to verify validity of the proposed methods, a dynamic stochastic route choice model based on Cross-nested Logit model was employed to generate traffic environment of dynamic stochastic user equilibrium.

为了验证本文提出的信号控制方法的有效性，利用Cross-Nested Logit 模型构建了动态随机路径选择模型来获得动态随机用户均衡的交通环境。

Dynamic analysis models for the train, bridge and track are established. And their dynamic equilibrium equations are derived.

本文的主要研究内容如下：(1)建立了车、线、桥动力分析模型，推导了各分体系动力方程。

Moreover, we also obtain equilibrium rather than oly free-disposal equilibrium under an additional standard condition.

此外，我们在增加一个标准条件下证得均衡存在，而不仅是自由处置均衡的存在性。

All equilibrium points of the original system are stable equilibrium points in the adjoint system.

对于一个非线性自治动力系统，存在一个伴随系统，该伴随系统是一个梯度系统，原始系统的所有平衡点都是伴随系统的渐近稳定平衡点，并且每一平衡点存在解析形式的Lyapunov函数。

By 3000 BC the dominion of the Semites in Babylonia was an accomplished fact.

由公元前3000年的自治领的闪米特人的东风是一个既成事实。

"You are quite a fellow to build this bridge after all I've said and done."

&你真是个好大哥，尽管我的所做所为对不住你，你还建起这么一座桥。&