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On this paper, the pulse electrochemical compound finishing technology parameters which influence the finishing surface roughness was paid attention to, such parameters include the pulse frequency, the duty factor, the peak voltage, the finishing time and so on. Then basic craft rule of two kinds of mold material in finishing process were obtained, and each kind of parameter in this craft was optimized by means of the orthogonal experiments.

在此基础上，重点考察了脉冲电化学复合光整加工过程中各工艺参数对光整后表面粗糙度的影响，如：脉冲频率、占空比、峰值电压、光整时间等，由此获得了这两种模具材料在整个过程中的基本工艺规律，并通过正交试验对光整加工中的各参数进行优化。

The reactionsystem of polyesterification of DFA and EG was analyzed and simplified. Based on thehypothesis of equal and unequal activity of the end-group of monomer and polymer,the modelⅠand modelⅡfor estimating kinetic parameters were established usingimproved Genetic Algorithm, which was so improved by introducing the Elitist Model,Simulate annealing, Runge-Kutta method, proportional distribution randomizer etc.into the operators, and these models were more compatible with the estimation ofcomplex reaction kinetic model parameters.

对二聚脂肪酸与乙二醇缩聚反应体系进行了分析和简化，基于单体和聚合物端基等活性及不等活性的假设，采用已加入最优保存策略、变量数值扰动、龙格库塔积分(Runge-Kutta)算法、均匀分布的随机数发生器算子的遗传算法，建立了模型Ⅰ和模型Ⅱ，并利用C~计算机语言编程来估算动力学模型的参数。

The characteristics in design of components of tires, fundamental parameters and supplementary parameters for design of tire structure are analyzed. Then according to practical requirements and experience in design, general principles for tire design are put forward. The problems of disaccord of circle's radiuses in vertical and horizontal axis and the excessive errors in solving equations are solved. At last, with the work accomplished above, computer design of tire cross section may be achieved after completing those computer programs for the design.

论文首先分析了轮胎各部分的设计特点以及轮胎结构设计的基本参数和附加参数，根据实际要求和设计经验，提出了进行轮胎结构设计的总原则，解决了程序语言中圆的纵横比不统一和求解方程时误差太大的问题等，编制出了用于轮胎结构设计的子程序和总程序，实现了轮胎断面结构的计算机设计。

According to the acoustic model of piston slap noise, how the parameters affect the piston slap noise at different rotate speed was discussed. And those parameters were piston clearance, piston pin offset, connect rod ratio, piston skirt stiffness, crank shaft offset, height of piston's gravity center, total length of piston skirt, vertical position of piston-pin axis and under part length of piston skirt.

借助建立的活塞拍击噪声理论声学模型，深入探讨了配缸间隙、活塞销偏移量、连杆比、活塞裙部刚度、曲轴轴线偏移量、活塞质心高度、活塞裙部总长度、活塞销轴线竖直方向位置和活塞裙部下段长度等主要影响参数在不同的转速下对活塞拍击噪声的影响规律，初步总结出活塞低拍击噪声设计和改进的基本规律。

Accoding to the gained velocity and pressure fabric, fluids' flow mechanism in the flow channel was researched, and the effects of changes of many parameters such as geometical, material and processing parameters on the flow field's pressure and velocity fabric in the flow channel of pipe die for extrusion were analyzed and discussed.

代入管材常用挤出塑料的参数，利用ANSYS有限元软件进行了三维流场计算，对物料在流道内的流动过程进行了模拟，求出了流场的速度分布和压力分布，研究了物料在机头流道内的流动机理。

By using the UG top down assembly modeling technology,and optimizing the design parameters of extrusion die for pipe products,the parameters SQL database of extrusion dies was established.Microsoft Visual Studio.net 2003 MFC was chosen as the development platform of the system,and an intelligent parametric design system of extrusion dies based on UG was designed,which can automatically generate 3D extrusion die assembly parts and graphics.

应用UG自顶向下的装配建模技术，对挤出模头进行参数化设计，建立智能挤出模头参数SQL数据库，采用Microsoft Visual Studio 。net 2003环境进行MFC编程，构建一个基于UG的管材挤出模头智能参数化设计系统，在UG中自动生成三维挤出模头零件和装配图。

The relations between the simulation circuit parameters and the linear motor parameters were achieved by analyzing the equivalent circuit of the linear motor and the simulation circuit of piston displacement self-sensor.

通过分析直线压缩机的直线电机的等效电路和活塞位移自传感器的模拟电路，得出了模拟电路参数与直线电机参数之间的关系。

Therefore, it is necessary to investigate metal flow rules in plastic forming process and calculate deformation parameters and dynamic parameters to improve rolling technique、quality and precision of products and reduce cost of production.

因此，研究和探索塑性加工中金属的流动规律、变形参数以及力能参数的计算，对改善轧制工艺、提高产品质量和精度、降低生产成本，都非常必要。

When parameters of induction power source periodic current, position of steel plate beside the induction heater, etc confirmed, induction heating time, solder quantity, etc parameters changed, the mutation of the welding quality was researched.

确定感应电源振荡电流、钢板与感应加热器的距离等参数，试验研究感应加热时间、钎料量等参数对钎焊接头质量的影响。

This software requires less input parameters, use-friendly, easy to operate, and can output the curve of rock mechanics parameters, stress curve, collapsing pressure and rupture pressure curve, and can guided the Air-drilling Well body structure design and the field practicals.

软件要求输入的参数少，界面友好，操作方便，能输出岩石力学参数曲线、地应力曲线、坍塌压力与破裂压力曲线，对空气钻井井身结构设计以及施工具有很强的现实指导意义。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。