查询词典 fluid dynamics

After studying abroad and home studies on housing price and price dynamics, this paper constructed an analytical frame to examine house price dynamics through autocorrelation and spatial correlation and explained the causing mechanism about it.

在梳理了国内外学者关于住房价格、住房价格波动相关研究的基础上，本文建立了通过自相关和空间相关两个维度考察城市住房价格波动的分析框架，解释住房价格波动的产生机制。

Based on rubbing model of a two-disk rotor-stator system with consideration of both rotor and stator dynamics,a numerical integration program is applied to numerical simulation and analysis of the nonlinear dynamics of this system,such as bifurcation,Poincare section map,trajectory of axes,phase trajectory,frequency spectrum diagram and time response.

基于一新型径向-轴向复合碰摩双盘转子-机匣力学模型，利用数值积分和Poincare映射方法，对转子-机匣系统由于径向-轴向碰摩故障导致的非线性动力学行为进行了数值仿真研究，给出了系统响应随转速和偏心量变化的分岔图和一些典型的Poincare截面图、相轨图、轴心轨迹、幅值谱图和时域响应等。

Key words: zhuan K6 type bogie; aluminium alloy gondola car; dynamics test; dynamics performance

试验结果还表明，降低转向架减振系统的弹簧刚度对降低车辆的轮重减载率是有益的。

This paper studies the granite growth, development and emplacement as well as their relations to the tectonic dynamic background and to reaction of ocean crust, continental crust and mantle. Thus, not only the contents of pluton study are enriched, but also new evidence for the tectonic evolution, plate kinematics and dynamics are obtained, indicating that the study of formation process and deformation reworking of plutons can provide more information on plate tectonic and continent dynamics, so they should be studied more.

本文研究了花岗岩体的成因、生长演化、形成定位及与构造动力学背景的关系，并注意与陆壳、洋壳、地幔三者之间相互作用的关系，这样，一方面丰富了花岗岩研究内容，提高了花岗岩研究程度；另一方面也对探索东秦岭地区大地构造演化及动力学等问题提供了新的证据和认识，表明在板块构造、大陆动力学研究方面，花岗岩体形成过程等方面的研究也能提供难得的信息，今后应注意加强研究。

According to the analyzing complex supply chain system collaboration and the rebuilding requirement of the enterprise, four aspects are studied in the thesis:1. The complexity of supply chain and the characteristics of System Dynamics method are studied at first. An isomerous supply chain System Dynamics model that has two supply modes is established based on the analysis on a core manufacturing enterprise supply chain.

针对应用系统动力学理论分析复杂供应链协同这一问题，并结合企业供应链改进的需要，本文开展了以下几个方面的研究工作。1、研究了供应链系统的复杂性和供应链系统动力学方法的特点，针对以制造企业为核心的供应链，建立了两种供应模式的异构供应链系统模型。

Point to take MQ2535 portal crane jib system as to research object, take finite element and mechanical kinetics as to theoretical fundamental, make use of ansys8.1 to emulate jib systemic at the course of luffing in dynamics , obtain luffing procedural dynamics data of rigid body and elastic body of the jib system , according to those data,which is to improve these system designs beneficial conclusion henceforth.

针对以上问题，本文以MQ2535门座起重机臂架系统为研究对象，以有限元和机械动力学为理论基础，借助ANSYS8.1对臂架系统的变幅过程进行了动力学仿真，得到了臂架系统刚体和弹性体变幅过程的动力学数据，从数据中得到了对今后改善该系统设计的有益结论。

In this paper,according to the theory of multi body dynamics ,the multi body dynamics model of leaf spring is established.

文章从多体系统动力学的角度出发，建立了钢板弹簧的多体动力学模型，并应用机械系统动力学仿真软件ADAMS对其动特性进行了计算机仿真，仿真分析的结果与试验数据基本吻合，说明该仿真是成功

To develop Linear Fractional Transformation model based on quasi-linear model for ground-to-air missile, state transformation method was used to establish quasi-Linear Parameter Varying model for missile longitudinal short-period dynamics by changing missile states along with an equilibrium trajectory decided by time-varying parameters. Based on the obtained quasi-LPV model, the LFT model of the missile was developed by use of MATLAB functions, and the missile dynamics were explicitly separated into certainty part and time-varying parameter part.

为了建立基于准线性化模型的地空导弹线性分式变换模型，采用状态替换方法将导弹的状态沿着一条由时变参数决定的平衡点轨迹进行变换，建立了纵向短周期动力学的准线性参数时变模型；基于所建立的准LPV模型，采用MATLAB函数建立了导弹的LFT模型，将导弹动力学明确描述为确定性部分和时变参数部分。

A combination of VB6.0 and the software of dynamics simulation analysis of mechanical system ADAMS complete the dummy test platform design, the modeling as well as the determination of movement parameter; realize the collection of the design of link motion gear, the parameter modeling, the kinematics analysis and dynamics analysis of machine as an incorporate experiment platform.

结合VB6.0语言和机械系统动力学仿真分析软件ADAMS完成了虚拟试验台的设计、建模以及运动参数的测定，实现了集连杆机构设计、参数化建模、机构运动学分析和动力学分析为一体的连杆机构综合实验台。

Once more, applys three-dimensional CAD software Pro/Engineer establishing the geometry models of all kinds of parts in the crank link mechanism, then useing the Pro/E software assembling function assembles the components of crank link into the piston module, the connecting rod module and the crank module, then using Pro/E software mechanism analysis module (Pro/Mechanism), establishes the multi-rigid dynamics model of the crank link, and carries on the kinematics analysis and the dynamics analysis simulation, and it studies the piston and the connecting rod movement rule as well as crank link motion gear movement envelopment. The analysis of simulation results shows that those simulation results are meet to true working state of engine.

再次，应用三维CAD软件：Pro/Engineer建立了曲柄连杆机构各零部件的几何模型，在此工作的基础上，利用Pro/E软件的装配功能，将曲柄连杆机构的各组成零件装配成活塞组件、连杆组件和曲轴组件，然后利用Pro/E软件的机构分析模块(Pro/Mechanism)，建立曲柄连杆机构的多刚体动力学模型，进行运动学分析和动力学分析模拟，研究了在不考虑外力作用并使曲轴保持匀速转动的情况下，活塞和连杆的运动规律以及曲柄连杆机构的运动包络。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。