数学模型

The parabolic equation can treat large angle incident waves and includes the wave energy loss with Bretchneider—Reid formula which has been verified by lots of indoor and field data, Its numerical model can simulate wave shoaling、refraction、small angle diffraction and bottom friction, and can be aplied to study the wave filed from open sea to shore area.

在抛物型缓坡方程波浪数学模型的建立过程中，采用适用于较大角度传播的基本方程，同时这一模型引入建立在较多实验和实测资料基础上的Bretchnei-der—Reid公式，较好地考虑了底摩损耗问题。该模型可同时考虑波浪的浅水变形、折射和小角度绕射，适用于大范围波浪场的推算。

To meet the need of economy development, the idea of hybrid model with synthesizing the advan...

为适应发展的需要，有人曾提出综合物理模型和数学模型优点于一体的复合模型的思想。

The influences of the structural and movement parameters of the arc-track-type flexible holding and conveying mechanism and the sugarcane stalks geometric parameters on the conditions of sugarcane stalks outward windrowing, windrowing angle and distance were analyzed.

对甘蔗在夹持输送终点抛出后和着地时的运动学进行了理论分析，并建立了数学模型，推导出了甘蔗向外铺放的条件，以及甘蔗铺放距离、铺放角的理论计算公式，分析了圆弧轨道式柔性夹持输送装置结构参数、运动参数、甘蔗几何参数对甘蔗向外铺放、铺放距离、铺放角的相互影响规律；对甘蔗在夹持输送过程中的受力情况进行了理论分析，建立了甘蔗在夹持输送装置中所需最小夹持力模型，以及甘蔗质心距柔性夹持元件上端最大距离模型。

After glucose is consumed, the yeast cells can metabolize ethanol for diauxic cell growth as well as product formation.

建立了描述此现象的数学模型，从实验数据回归获得了模型参数值，模型的计算曲线与实验数据拟合较好。

A mathematical model of high-voltage short distance ring power transmission lines is developed and a multiple modules coupling model of this power transmission system fit for digital real-time simulation is further presented on the basis of known models of synchronous machine and composite load.

建立了高压短距离环形电力传输线的数学模型，并在已知同步发电机与综合负载模型的基础上，进一步提出了适合于该电力传输系统数字实时仿真的多模块耦合模型，同时给出了相应的数字积分方法。

It raises overall design scheme of the machine tool, adopts model association structure. The machine tool adopts frame structure and five axels CNC, and it can process the optical elements with the diameter of 500mm.

Jones提出的卷积原理，建立去除函数模型和驻留函数模型，用此两个数学模型表示材料去除量函数；以机床性能要求为前提，进行计算机控制小工具抛光机床的结构设计。

Being lack of color matching system for pre-colored wool top blends, it is urgently needed to develop a computer-aided system to help colorists find a good recipe to reproduce a target color. An optimized mathematic model that can be used in computer color matching for wool top blends is set up by using the improved Stearns and Noechel.

针对缺少理想的混色模型现状和开发计算机混色配色系统的迫切需要，在对经验Stearns-Noechel模型优化和改善的基础上建立了适用于毛条混色应用需要的计算机配色预测数学模型。

With famous flow-field analytic software CFX we also simulated the flow's details in the homogenizers head, and analyzed it's infection to the homogenization process using the simulation results. We also established the dynamic model of the stator-rotor of shear homogenizer system, and analyzed important factors that affect the system's stability with the help of the poincarémaps, axes contrails, phase plane portraits, times-history and amplitude spectrum which were attained by Fortran language and Matlab program.

然后，本文运用商业通用流体动力学分析软件CFX对均质头内部的流场进行了仿真模拟，并与数学模型相结合，探讨了剪切式均质机内部的流场对均质效果的影响，得出提高转速是提高均质机效率的关键，但是转速的提高又直接关系到系统的稳定性，于是紧接着建立了剪切式均质机转子系统的动力学模型，经无量纲化和必要的简化后再运用Fortran语言和Matlab软件对该模型编写相应的程序，得到了庞卡莱图，轴心轨迹图，相图，波形图，频谱图等图谱。

A mathematical model was established, for simulating the separation efficiency of demisters with serrated baffles in a wet flue gas desulfurization tower, based on a group of equations, which describe the two phase flow within demisters, to be closed with both a k-ε and a particle-track model.

根据N S方程组对湿式烟气脱硫塔中折线型挡板除雾器内气液两相流动进行了描述，采用k ε模型及颗粒轨道模型对方程组进行封闭，建立了该类除雾器分离效率的数学模型。

The research contents of this subject are mainly: Proposing the overall scheme of the soft firing technology, than confirm the best scheme; On the basis of best scheme , set up the mathematical model of soft firing system, and set up the interior ballistic trajectory calculating model among MATLAB/Simulink, set up soft the three-dimensional dynamics model of firing system among ADAMS; Go on joint simulation, simulating the characteristic curve of bore pressure and the sport law of piston and shot; Through adjusting the parameters such as piston quality、the diameter of unilateral valve、 charge weight、charge form coefficient and the delay time of lighting fire etc to make the soft firing system reach the best state of dropping the composition of forces of gun bore and increasing initial velocity of pill.

论文的研究内容主要是：提出软发射技术总体方案，确定最佳方案；在最佳方案的基础上，建立起软发射系统的数学模型，并在MATLAB/Simulink中建立内弹道计算仿真模型，在ADAMS中建立软发射系统的三维动力学模型；进行联合仿真，模拟膛压特征曲线及活塞和弹丸运动规律；通过对活塞质量、单向阀直径、装药量、药形系数、点火延迟时间等参数进行调整，使软发射系统达到炮膛合力下降、弹丸初速提高的最佳状态。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。