数值计算

With this method, model is offered,which is convenient to analysis calculation,dynam...

为建立完整的空调和制冷系统提供数值计算，为空调和制冷系统的动态特性模拟和优化设计提供通用、方便的数学模型。

Therefore, based on numerical calculation of a multibranch well's productivity, the influences of the branch angle, branch interspaces and branch length on the gas yield are investigated. The results show that a.

为此，以多分支井产能数值计算方法为基础，研究了多分支井的分支角度、分支间距和分支长度对产能的影响。

Using the ray tracing and Monte Carlo as well as the experimental fitting data, we present a numerical simulation model for pumping cavities of the multisegment Nd:glass amplifier.

采用光线追迹和蒙特卡罗法以及实验拟合数据，建立了多段钕玻璃放大器闪光灯泵浦腔的数值计算模型。

In this paper, numerical computations are made on the scattering of ultrasonic pulse waves with different centroid frequencies of 100 kHz,500 kHz and 1 MHz in fluid-filled finite-length perforation by using Finite Element Method,where three kinds of models of perforation bottom, I.E., flat bottom, stepped bottom and acuminated bottom,are assumed to simulate the practical bottoms of perforation.

乔文孝，杜光升。射孔孔眼中散射超声脉冲波的FEM模拟。测井技术，2001，25（2）：96～100 采用有限元素法，分别数值计算了平底孔道、台阶式孔道和尖劈状孔道等3种孔眼模型中不同中心频率(100 kHz、500kHz、1 MHz)的散射超声脉冲波。

Both M2-factor and PIB are chosen as the criterionfor charactering laser beam quality, detailed numeri cal calculations are performed toillustrate the effect of the spherically aberr ated lens on laser beam quality.

以M2因子和PIB作为光束质量评价的参数，进行了详细的数值计算来说明球差对光束质量的影响。

The result of numerical simulation indicates that production of 86 as pulses can be achieved using the designed chirped multilayer mirror.

数值计算表明，采用所设计的啁啾多层膜反射镜可以获得86 as的脉冲。

Because molecular systems generally consist of a vast number of particles, it is impossible to find the properties of such complex systems analytically; MD simulation circumvents this problem by using numerical methods.

由于分子系统通常包含大量的粒子，像这样负责的系统根本不可能找到一套性能分析的方法；分子动力学模拟利用数值计算方法规避了这一问题。

The program is codified and an examp le is given to show the programming of finite element method.

据此编制了有限元分析的数值计算程序，并给出了一个实例。

When they convected through cusp region,the time that precipitating particle acting on the plasma flux tube was different.

数值计算结果表明，当磁流管在极隙区停留的时间足够长，F层电子密度能显著增大。

Numerical results show that ARM may be decoyed to a trapped area if the power and initial phase of the radiation filed of the decoy relative to the radar are set to some appropriate values.

数值计算表明，通过合理设置雷达诱饵布阵距离、诱饵辐射功率与雷达副瓣辐射功率的相对大小及诱饵辐射场与雷达辐射场初始相位的相对关系，可以使反辐射导弹跟踪进入雷达和诱饵之间的陷阱区域。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。