查询词典 numerical calculation

In the background of numerical simulation for the transonic flow about advanced transport aircraft with wing-mounted nacelles, great efforts have been made in this thesis for the improvement of the grid generation technique and the numerical methods for solving the Euler equations.

本文以民用飞机复杂外形跨音速绕流数值模拟及气动力分析为应用背景，在复杂空气动力外形网格生成技术，Euler方程数值求解方法的改进。。。

We use the single particle model and find a new nonlinear resonant acceleration criterion analytical: nw(1)+mw(2)=NW, m,n,Nare integers, w(1,w(2), W are the frequency of the two waves and the charged particle cyclotron respective,this result can be extended to the multiple waves ,we make numerical simulation and numerical results are consistent with the analytical results. This paper consists six chapters.

因此本文从基本的情况开始，以两个静电波与磁化等离子体相互作用问题为研究出发点，通过多标度展开的理论方法，求解带电粒子的运动方程，得到的一个新的非线性共振加速条件：nw(1)+mw(2)=NW，（m，n，N为整数，W，w(1)，w(2)分别为带电粒子的回旋频率以及两个静电波的频率），该结果可以推广到多个静电波作用于磁化等离子体的情况，随后通过数值计算证实了解析结论的可靠性。

In order to deal with the numerical stability of convection dominated problems, using the local upwinding weight function, the upwinding local radial point interpolation method is proposed based on the local radial point interpolation method, and were then compared with those numerical results of the LRPIM.

为处理对流扩散问题中对流项占优时的数值稳定性问题，采用局部上风式权函数，在局部径向基点插值无网格法基础上构建了上风式局部径向基点插值无网格法。

Aiming at simpling the structure of numerical control system, and decreasing the cost and difficulty of development, a numerical control system based on the programmable logic controller was designed for a stereolithography apparatus machine with utilizing the prominent feature of the easy development and higher reliability of the PLC.

为简化光固化快速成形数控系统的结构、降低系统开发的成本和难度，结合所设计的成形设备特点，利用可编程逻辑控制器具有的开发简单、性能可靠等优点，设计了一个基于PLC的光固化快速成形数控系统。

Experiment 7 investigated the saccades feature and number distance effectusing the numerical comparison task under endogenous attention.Experiment 8 investigatedthe saccades feature and number distance effect using the numerical comparison task underexogenous attention.

实验7在内源性注意条件下，采用数字大小比较实验任务，考察数学学优生和学差生数字加工中的眼动特征和距离效应；实验8在外源性注意条件下，采用数字大小比较实验任务，考察数学学优生和学差生数字加工中的眼动特征和距离效应。

In this paper, a theoretical investigation of the drag and noise reduction by riblets is carried out, and these numerical results are compared with those obtained from experiments with riblets in water tunnel, and it is found that they agree with each other in tendency and numerical value.

本文从理论上分析了条纹表面的减阻降噪特性，并将计算结果与水洞模型贴膜实验进行了对比，两者在趋势和数值上基本一致。

In order to survey the numerical diffusion induced by mesh rezoning and variables remap in ALE method,some calculations had been done,and comparisons show that the smoothing does exist,but the numerical dissipation is not serious,it do no harm to physical picture.

为考察ALE方法网格重分、物理量重映导致的数值扩散对计算精度的影响，进行了一些计算比较，结果显示，虽然存在一定程度的抹平现象，但是网格重分带来的数值耗散并不大，对物理图象并没有显著的影响。

Company area 12,000 square meters, the floor space 8000 square meters, is engaged in the specialized production plate work series product the enterprise, for casting machine, the numerical control processing center and so on equipment production necessary ..existing specialized design advanced CAD the CAM technology, has the design manufacture high difficulty plate work the ability, dozens of University of Taiwan numerical control plate cutter, the knee bend machine, the Dragon Gate mill, the ion cutter and so on the special purpose equipment.

公司占地面积12000平方米，建筑面积近8000平方米，是一家从事专业生产钣金系列产品的企业，为注塑机、数控加工中心等设备生产配套。现有专业设计先进的CAD、CAM技术，拥有设计制作高难度钣金的能力，数十台大型数控剪板机、折弯机、龙门铣、数控激光切割机等专用设备。

The Shanghai number permanent RJ mold has made the limited companyto be established since 1996, established Wicks the brandseries mold, passes through more than 10 years development, hasestablished the leading status in the national mold profession,unceasingly grows along with the company, we already become from thenumerical control knee bend mold to the numerical control ZTCM and the plate cutter bit omni-directional numerical controlplate work processing equipment cutting tool mold supplier.

上海数恒刃具模具制造有限公司自1996年成立以来，创立了威克斯品牌系列模具，经过十多年的发展，已在全国模具行业确立了领先地位，随着公司不断成长，我们已经成为从数控折弯模具到数控转塔冲模及剪板机刀片的全方位数控钣金加工设备刀具模具的供应商。

The Shanghai number permanent RJ mold has made the limited companyto be established since 1996, established Wicks the brandseries mold, passes through more than 10 years development, hasestablished the leading status in the national mold profession,unceasingly grows along with the company, we already become from thenumerical control knee bend mold to the numerical control ZTCM ＆ the plate cutter bit omni-directional numerical controlplate work processing equipment cutting tool mold supplier.

上海数恒刃具模具制造有限公司自1996年成立以来，创立了威克斯品牌系列模具，经过十多年的发展，已在全国模具行业确立了领先地位，随着公司不断成长，我们已经成为从数控折弯模具到数控转塔冲模及剪板机刀片的全方位数控钣金加工设备刀具模具的供应商。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。