数值方程

The paper investigates the impact of the shape of amphibious vehicle s on viscous resistance when steering over water.

针对两栖车辆水上行驶时，车体包络线对黏性阻力的影响问题，基于RANS方程结合k-ε湍流模型，利用"刚盖"假定，不计兴波阻力及来流湍流度的影响，进行了某两栖车车体模型静水航行的数值模拟。

The discrete equation was deduced by control volume integral method, and realized by numerical method.

用控制容积积分法导出了离散方程，并用数值方法进行了求解。

The behaviour of the viscous fluid flo w with a free surface is expressed by the unsteady Navier-Stokes equation.For nu merical integration in time domain the velocity correction fractional step metho d is used.

在任意拉格朗日欧拉坐标系下，用非定常不可压的N avier-Stokes 方程来描述粘性带自由面流体的运动，在时间的数值积分中采用了速度修正分步法。

Forward modeling methods based on wave equation have been widely applied in seismic data acquisition, processing, and interpretation.

基于波动方程的数值模型正演模拟方法已经被广泛应用于地震数据采集、处理和解释的各个方面。

Thequasi-conforming element methods are the exact solutions of generalized compatibilityequation and satisfy the weak continuity requirement naturally.

叙述了弱形式的弹性力学哈密顿正则方程，边界条件作为非齐次项，以便于采用数值、半解析和解析计算方法。

Based upon a systematic review on the study of subtropical anticyclone, in this study, the mechanism linking the formation of subtropical anticyclone in boreal summer to zonally asymmetric diabatic heating is investigated via data diagnosis, theoretical study, and numerical experiment. The complete form of the tendency equation for vertical vorticity development, the NCEP/NCAR reanalysis data, and the IAP/LASG GOALS climate model are employed for the study.

本文在回顾有关北半球副热带高压研究的基础上，基于全型垂直涡度倾向方程，利用NCEP／NCAR月平均资料和IAP／LASG GOALS气候模式，从资料诊断、理论研究及数值试验三方面研究了纬向非对称非绝热加热对北半球夏季副热带高压形态变异影响的物理机制。

In this paper,a 3-D numerical simulation model is proposed to simulate and analyze the 3-D flow characteristics of natural spawning sites of Acipenser Sinensis by using N-S and k-ε formulas,the volume of fluid method is also used to simulate the two phase flow,and the finite volume method is used to disperse the calculated area.

将水动力学N-S方程、k-ε紊流数值模型与计算水气两相流的方法VOF相结合，采用控制体积法离散计算区域，建立了葛洲坝下游中华鲟产卵场的三维流场模拟模型。

Asymptotical and numerical solutions are obtained. The total number of the patients in Beijing is simulated.

得出了该时滞微分方程的渐近解和数值解，并对北京市SARS 疫情中的累计患病人数进行了模拟。

The existence of positive periodic solution is obtained by the help of Mawhin continuation coincidence degree theory and the global attractivity of positive periodic solution is presented by Lyapunove method.

推广和改进了已有的相应的非脉冲微分方程的结论；利用Lyapunov泛函，得到了该系统正周期解是全局渐近稳定的，从而得到了周期解的存在唯一性，通过数值模拟来验证了所得到的结果。

A time domain differential equation model is established by using the axisymmetrical form of the Maxwell's equations,and the finite element time domain method is applied to solve the model.

使用麦克斯韦方程组的轴对称形式建立时域微分方程数学模型，应用时域有限元法求解，给出了数值算例，模拟了在不同缺陷参数下涂有电介质的导体对入射脉冲太赫兹波的响应，并归纳了响应在空间上和时间上的变化规律。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。