动力学

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。

The kinetic approach of the substrate reaction during modification of enzyme activity has been applied to a study on the kinetics of the course of inactivation of metal enzyme by metal ion chelator and reactivation of apo-enzyme by metal ion restoration.

应用邹承鲁先生建立的底物反应动力学的理论研究了含金属锌离子的氨基酰化酶在金属螯合剂的作用下去金属失活的动力学研究和去金属失活的氨基酰化酶与金属离子重组恢复活性的动力学过程的研究中。

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。

The ammonia volatilizing of fertilizer is suit to the dynamic equation as Y=a+bt, thecoefficients in the equation are related to the kind of fertilizer, temperature and water content of soil, and the dynamic equation about ammonia volatilization including water and temperature and the is developed.

肥料氨累积挥发量符合零级反应动力学方程Y=a+bt，方程中系数与肥料种类、温度和土壤含水量有关，碳铵a、b值均比硫酸铵高，土壤含水量增大，a、b值降低，温度升高，a、b值增大，并由此得到含温度或土壤湿度因子的肥料氨挥发动力学方程，并建立了含水、热因子的肥料氨挥发水热耦合效应动力学方程。

METHODS:The dissolution curves of nicrandil-ethylcellulose solid dispersion granules and tablets were measured. The release data were fitt ed with three model equations. The release kinetics and release mechanisms of g ranules and tablets were judged by the sequence of correlation coefficients of t hree fitting equatuions.

测定尼可地尔-乙基纤维素固体分散物颗粒及片剂的释放曲线，并用3种模型方程--零级动力学方程、一级动力学方程、Higuchi模型方程进行线性拟合，根据所得方程的相关系数的大小顺序，确定颗粒及片剂的释放动力学及释放机制。

The interfacial chemistry, synergistic effects and interfacial kinetics of thesynergistic extraction system D_2EHPA-MPA-Fe~(3+) have been studied, where MPA is amono-alkyl phosphate extraction with long carbon chain. D_2EHPA in the mixed extractionsystem strongly exhibits the effect on the thermodynamics of micella formation and interfaceproperties of MPA. Some thermodynamic parameters of micella formation were obtained.The interfacial adsorption behaviour of D_2EHPA is opposite to that of MPA. Theemulsification for single MPA and the mixed system was discussed. The synergistic effectswere found in this mixed extraction system. It is proved that the process of Fe~(3+) extractionfor non-mixed extraction system is controlled by chemical reaction, the controlling reactionoccurs at the interface, and the reaction rate equation is obtained.

本文研究了协同萃取体系D_2EHPA—MPA—Fe~(3+的胶团形成热力学、界面特性、协萃效应和界面动力学(动力学控制机制和反应速率方程)研究发现，混合萃取体系中的D_2EHPA强烈地影响MPA的胶团形成热力学和界面吸附行为，得到了胶团生成常数、胶团形成自由能和临界胶团浓度的热力学参数D_2EHPA和MPA具有相反的界面吸附行为研究发现D_2EHPA—MPA混合萃取剂体系对Fe~(3+)产生了协萃效应动力学和界面化学的研究结果还证实了非胶束混合萃取体系的Fe~(3+)的萃取过程是受化学反应控制的，控制反应发生在界面上

In the second part, the paper terns to abtaining the motion controllers with high performance by intelligent learning methods.

然后将其用于机器人复杂运动的动力学建模，讨论了机器人运动受约束时的逆动力学问题和正动力学问题，显示了本文方法在处理附加于机器人系统的约束时的统一性和方便性。

In this paper,the raft is approximated by a thin plate with regular shape at first.Then the floating raft system is divided into several subsystems,such as plate raft,elastic foundation,etc,which are respectively modeled by four-parameter net method.After that,dynamic absorber and active absorber are put into a uniform frame to obtain the model of plate raft subsystem coupling with them.At last,according to the force and velocity relationship among each subsystem\'s interfaces,the entire plate floating raft system is modeled by subsystem structural admittance synthesis method.As the main structure of floating raft system is elastic,it is inevitably to study the optimization of actuators\' mounting positions before designing control law.In this paper,two new criterions are proposed for it.

本文首先将浮筏的中间筏架用一个规则形状的薄板近似；然后再将浮筏系统分解成若干个子系统，如板式筏架子系统、弹性基础子系统等，运用四端参数网络建立了它们的动力学传递方程，传递特性由导纳矩阵描述；接着，将动力吸振器和主动吸振器的(来源：ABC90论文00网www.abclunwen.com)分析统一于一个框架内，获得了与吸振器耦合的板式筏架子系统的动力学传递特性；最后，根据各子系统在各界面上的作用力和速度的相互关系，通过子系统结构导纳综合方法获得了整个板式浮筏系统的动力学传递方程，并在此基础上获得了系统的力传递函数模型。

In this paper, based on the tight-binding Su-Schrieffer-Heeger model and by using a nonadiabatic molecular dynamic method, we investigated some unclear problems of polymers in details, such as polaron dynamic properties in different systems, the inelastic scattering processes of oppositely charged polarons driven by an external electric field,and the influence of electron-electron interactions on the dynamics of a charge polaron in conjugated polymers.

本论文基于一维紧束缚的Su-Schrieffer-Heeger模型，采用非绝热的分子动力学的方法，针对高分子聚合物中一些尚未清楚的问题，如极化子在不同体系中的动力学性质、正负极化子的非弹性散射过程，以及电子-电子相互作用对极化子动力学性质的影响等问题进行了较详细的研究。

In this dissertation, according to the theory of Mechanical Dynamics and Multi-body Dynamics, a simulation model of NJ2046 light off-road vehicle including suspension system, steering system and tires is built with the software CarSim and so the vehicle steering characteristics are analyzed with the step angle input of steering wheel.

摘要本文根据机械系统动力学、多体动力学理论，运用动力学仿真软件CarSim建立了包括悬架系统、转向系统和轮胎等模型的NJ2046越野汽车整车仿真模型，在此基础上分析了NJ2046越野汽车在方向盘转角阶跃输入时的转向特性，通过对不同车速、不同载荷条件下的仿真计算，得出了在这些条件下该车具有的不同表现特征，揭示了转向特性与车速、载荷和轮胎的内在关系。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。