数学模型

The figure simulation of power system is a complex subject of computer science and computational mathematics and control theory and power system application technology. Its essential is that it study work characteristic of system in a definite-time by mathematical model.

电力系统数字仿真是计算机科学、计算数学、控制理论和电力专业应用技术等综合的学科，其实质是通过数学模型来研究系统在规定时间内的工作特征，即用模型来研究系统。

Moreover, this article has made a quantitative research of ship s leeway and drift angle s in different wind and currents after maneuvering.

本文在船舶平面操纵运动数学模型的基础上，建立了考虑浅水以及风、流干扰力和力矩作用的船舶操纵运动数学模型，并就船舶在横风横流作用下的风流压差角进行了定量的研究。

Also, a mathematical model for grinding four plane facet drill point is given at the end of the paper, which provides a theoretical basis for new drill grinder design.

本文在现有钻尖数学模型研究的基础上，进一步完善了基本型群钻的数学模型。

Based on the air drying theory of capillary porous media, mathematics model of through air drying of paper was established, and the mathematics model was analysed and calculated.

基于多孔介质气流干燥理论，建立了纸张气流穿透干燥的数学模型，并对数学模型进行了分析求解。

This thesis systematically reviewed the development of research methods of domestic and foreign float glass tank, and using Computational Fluid Dynamics software Fluent established mathematical model of glass flow and heat transfer model in the float glass tank.

本文在前人关于浮法玻璃熔窑数学模拟研究的基础上，利用计算流体力学模拟软件Fluent建立了浮法玻璃熔窑内玻璃液传热与流动模型的数学模型，适当利用简化处理方式对浮法玻璃熔窑内玻璃液流场和温度场进行数值模拟。

According to the foundings and results of the research, this reportputs forward the objective of introducing foreign genetical materials andthe method and measurements of cultivating new varieties consideringthe germplasm resources of Chinese alfalfa germplasm resources.

在数量分类的基础上，应用双重筛选逐步回归分析建立了中国苜蓿遗传属性与环境生态因子梯度相关的数学模型，反映了DCA排序与水分和热量的数学关系。应用这些模型可以预测中国苜蓿基因生态类型的时空格局。

The paper discussed the main factors that influence the design of the boring cutter hilt, constructed the optimizing mathematical model of the boring cutter hilt based on the basis of ANSYS, and made solution for the mathematical model with the help of the optimizing tools of ANSYS. The result shows that the method is a scientific and practical method for the design of boring cutter hilts, and can have great influences on improving the design precision.

分析了影响镗刀杆设计的主要因素，建立了镗刀杆基于ANSYS技术的优化设计的数学模型，并根据ANSYS8.0软件优化工具的功能对该数学模型进行了求解，优化结果表明：该方法是进行镗刀杆设计的一种科学实用的方法，对提高镗刀杆的设计精度有着重要的影响。

The point of intersection of three light-source on tested body is used as basic point, the mathematical model of line displacement is established.

并以固结在被测体上的三个激光器的交点为基点，建立其线位移数学模型；以方向余弦法来确定被测体的角位移，建立其角位移数学模型。

By way of introducing expression of salt solution concentration and Hendeson equation that describes equivalent moisture curve of hygroscopic material, the heat and mass transfer model is simplified and provides a theory proof that the transportation direction of water and vapor in the pore material is opposite but effects of two items can be integrated as an expression, Compared to traditional vapor permeating, the calculated results from the presented model in this paper that salt is not taken into considered is accurate.

根据建筑围护结构自身所处环境特点，开拓性建立了吸湿区范围内含盐多孔材料的热质迁移数学模型，通过引入描述平衡湿度曲线的Hendeson方程和盐溶液浓度的表达式，对含盐多孔介质热质迁移数学模型进行了简化，从理论上论证了多孔材料中液态水分和水蒸汽迁移二者过程的相反性和统一性。

The usage technique of radar for high-speed ship s to prevent collision in Three Gorges reservoir;2. Research on Modeling and Simulation of High-speed Ship CPP Propulsion System;3. Based on three typical high-speed ship (high-speed monohull ship,planning hydrofoil craft,wave-piercing Catamaran),a mathematic models of high-speed ship ′s propulsion system(common screw propeller,adjustable-pitch propeller, water-jet propeller) and intelligent control system are established the simulation with the help of Matlab/Simulink is realized.

以三种典型的高速船(高速单体船、翼滑艇和穿浪艇)为例，建立了其推进(普通螺旋桨、可调螺距螺旋桨及喷水推进)系统及智能控制的数学模型，并在Matlab/Simulink上实现仿真；建立了推进系统的优化数学模型，编制了优化算法(混沌算法、遗传算法和粒子群算法)程序，实现了智能推进系统的优化设计；最后，运用Matlab/GUIDE进行界面设计，编制了高速船智能推进系统仿真与优化软件，实现了良好的人机互动。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐