查询词典 fluid dynamics

A bar-headed goose population dynamics model was constructed in Qinghai lake region regarding the dynamics with STELLA graphical modeling software.

利用STELLA图形化建模软件，从动力学出发，构建了青海湖地区斑头雁种群数量变化的动态模型。

The differences in the geometry are as follows; We now flat grind the blade for slightly greater cutting dynamics through simply decreasing the included angle of the edge bevel,enhancingcutting dynamics. All in all, it is a more "user friendly" tool.

在几何学上的不同之处：现在在刀刃上采用平磨方式使其增加力学上的切割以减少角度的斜度，总而言之，对使用者来说它是一把更加喜爱的工具。

Kinematics and dynamics modeling and analyzing method of a 3-RRRT parallel robot was studied. Kinematic model of the 3-RRRT parallel robot was set up with both the branch bar's relative coordinates and movable platform's absolute coordinates used as it's generalized coordinates. On the base of Kane's equation, dynamics model of the 3-RRRT parallel robot was built. Dynamic Numerical simulation of the 3-RRRT parallel robot was finished by using Matlab software, and so it provides valuable reference for motion control strategy of the 3-RRRT parallel robot.

研究一种3-RRRT新型高速搬运机器人运动学与动力学建模及分析方法，以支链构件相对运动坐标和动平台绝对运动坐标作为广义坐标，建立了3-RRRT型并联机器人的运动学模型，结合带乘子的凯恩方程建立了3-RRRT型并联机器人的动力学模型，并利用Matlab软件平台进行了动力学数值仿真，进而为3-RRRT型并联机器人的控制策略研究提供参考。

By compared maximum coupler force and maximum acceleration of car body with common slack coupler at condition of train starting,braking,emergency braking and releasing,we verified that small slack coupler is better than common slack coupler in dynamics performance.This paper also calculated the train dynamics performance parameter with different buffer and braking system,running in different line and using different operating method.

本文利用列车纵向动力学模拟程序，计算了齐齐哈尔车辆公司研制的13号小间隙防脱车钩的纵向动力学性能，通过比较各个车钩间隙下列车最大纵向车钩力和列车最大加速度的数值，得出小间隙车钩在列车启动工况、常用制动工况、紧急制动工况、缓解工况的纵向动力学性能都较原有车钩性能优异的结论。

The basic principle and algorithm of molecular dynamics simulation are introduced, and the applications of molecular dynamics in the study of cutting mechanism of single point diamond ultra precision turning in oversea are summarized.

介绍了分子动力学模拟的基本原理和算法，综述了国外应用分子动力学研究单点金刚石超精密车削机理的进展情况，并提出了该领域今后的研究方

This paper researches into the development process of dynamics of rock and soil mass in the view of science phylogeny supported by hundreds of relative bibliographies drawing the systematic frame of dynamics of rock and soil mass.

本文从科学发展史的角度研究了岩土体动力学的发展过程，通过数百篇文献的搜集和综述，从不同的侧面反映了岩土体动力学的研究历史和现状，勾画了岩土体动力学理论研究和工程应用的体系框架。

Firstly several vehicle dynamics models and tire models are analysed. Combining with the present condition and studying require, 3 dynamic differential functions about bodyworks velocity, roll and vertical displacement are gained. Furthermore based on the following rear wheel rev function and front-and-rear wheels vertical moving function, a 6-DOF, two wheels, lognitudinal dynamics model of the bus is set up.

本文首先对几种车辆动力学模型和轮胎模型进行了分析，结合现有条件和研究需要，得到关于汽车车身的速度、俯仰角和垂向位移的3个动力学微分方程，结合利用Simulink得到的前后轮垂向运动方程和将在后续研究中给出的后轮转速方程，建立了客车两轮6自由度纵向动力学模型。

In this study, in order to examine the dynamics of tip [Ca2+]i together with the dynamics of tip-localized F-actin in vivo, a kind of double labeled material was constructed. The Ca2+ and actin microfilaments of Arabidopsis pollen tubes were labeled by cameleon and GFP-mTalin respectively.

本研究以拟南芥花粉管为材料，通过转基因技术，将分别标记Ca~(2+)和微丝的两种荧光蛋白cameleon与GFP-mTalin在花粉管中同时表达，实现活体花粉管中Ca~(2+)与微丝的同时标记。

On the bases of urban growth mechanism and theory, this paper concludes the kinds of urban growth, brings forward the emphasis and program to urban growth environment in china. On the bases of urban spatial growth theory, spatial structure and spatial dynamics, this paper establishes the spatial dynamics model system of urban growth. Analyzing the effects of information to urban spatial structure, this paper cognizes the reconstitution of urban spatial structure and the shift principle of urban basic spatial.

在城市增长机制和成因机理理论研究的基础上，对中国城市增长的类型特征进行了系统归纳总结，提出了中国城市增长的环境改革重点和对策；在分析城市空间结构增长原理、城市增长空间动力学过程的时空层次结构及空间动力学过程基础上，建立了城市增长的空间动力学模型体系；在分析信息化对城市空间结构影响的基础上，认知了信息化背景下城市空间结构的重构过程和城市基本功能空间的变化原理。

Dynamics model of four-foot robotThe dynamics model of four-foot robot has been analyzed in detail with geometry and inertia parameter of pole.

利用杆件的具体几何和惯性参数对四足机器人的动力学运动方程做了详细分析，为今后的动力学研究奠定了基础。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。