查询词典 vortex sheet

In the plastics industry by more than a decade of Mr. Chen Wuning was established in 2001, after I plant continued efforts of all staff, is now developed into one with PVC PET sheet machines and the most advanced of several high-speed Blister, on Production sheet in 300 tons of plastic over 100 tons, and have their own product research and development centers, able to provide customers from the sheet - mold - Daomo - finished one-stop production services business.

是由从事塑料行业十数年的陈武宁先生成立于2001年，经过我厂所有员工不断努力，现发展成为一家，拥有PVC PET 片材机及国内最先进的高速吸塑机数台，月生产片材300于吨，吸塑100多吨；并拥有自己的产品研发中心，能为客户提供从片材－模具－刀模－生产成品一条龙服务的企业。

Now have a new dry granite mines, sheet plant, Shangrao granite mines, sheet plant, Dexing granite mines, sheet plant each one, forming an annual output of 30,000 cubic meters of granite blocks, an annual output of granite, marble plates 600,000 square meters of the scale, with the processing stone table, stone chair, stone railings, stone lions, mushroom, lychee board, fire board, polished column, Roman column, stone carving, Curb, sidewalk boards and other special-shaped stone processing capacity.

现拥有新干花岗岩矿山、板材厂，上饶花岗岩矿山、板材厂，德兴花岗岩矿山、板材厂各一个，形成了年产花岗岩荒料3万立方米，年产花岗岩、大理石板材60万平方米的规模，具备了加工石桌、石椅、石栏杆、石狮、蘑菇石、荔枝板、火烧板、磨光圆柱、罗马柱、石材雕刻、路沿石、人行道板等异形石材加工能力。

The geometry of three dimension vortex sheet of the sides of foil and its trailing were determined by the kinematic boundary condition.

针对三维舵存在的端部梢涡及其尾涡卷起的现象，提出了一种新的考虑端部梢涡卷起的三维短翼理论计算模型。

By means of the present model certain phenomena related to the nonlinear acoustic properties of an orifice, such as the roll-up of the shed vortex sheet and the forming of the Vena-Contracta are simulated. For a sinusoidal sound pressure, the time- history of the average velocity through the orifice is computed, and the nonlinear distortion of the velocity is examined by means of the Fourier decomposition.

依据此模型，对圆孔声学非线性效应的若干特征现象进行了数值模拟，如脱落涡层的卷曲，Vena收缩段的动态形成；在孔板前声压按余弦规律变化的情况下，计算了孔中平均速度的时间历程，并借助于Fourier分解分析了孔中平均速度的畸变情况。

Moreover, to prevent the vorticity from entering into the body, the concept of "residual vorticity" is introduced in the sense that partial circulation of the vortex sheet is remained at the boundary without being diffused into the flow field. Blobs very close to the wall are thus unnecessary.

为避免部分新涡泡太过接近边界，我们引入了「残留涡度」的概念，将离边界甚近之环量转为涡片形式留在边界上，以减少环量进入物体内部之误差。

To simulate the diffusion of the vortex sheet into the flow field as time goes on, Koumoutsakos' analytical solution is employed, in which an effective vorticity flux is derived and used for solving the vorticity diffusion equation.

而涡片之环量随时间扩散进流场之现象则藉由Koumoutsakos之理论，以边界上之等效涡度通量求解扩散方程式，得解析解后，再将之离散为边界附近之新涡泡。

The no-penetration boundary condition is satisfied by placing a vortex sheet along the boundary, which strength must be adapted to cancel the slip velocity on the boundary induced by all the other flow components.

本论文以Leonard之面积扩散涡漩法及Huang之涡泡分裂融合修正法为基础，开发一满足无滑移、无穿透边界条件之数值模拟工具。

To simulate the diffusion of the vortex sheet into the flow field as time goes on, Koumoutsakos' analytical solution is employed, in which an effective vorticity flux is derived and used for solving the vorticity diffusion equation. The solution is then discretized into blobs (called "-blobs") in the vicinity of the boundary.

而涡片之环量随时间扩散进流场之现象则藉由Koumoutsakos之理论，以边界上之等效涡度通量求解扩散方程式，得解析解后，再将之离散为边界附近之新涡泡。

Moreover, blobs may move too close to the boundary because of advection errors or other numerical errors. It may cause serious fluctuations in evaluating the strength of the vortex sheet. In order to reduce the fluctuations, these near-wall blobs are also manipulated in use of the concept of "residual vorticity". Finally, we apply the so-developed solver to a simulation of the flow past an impulsively started circular cylinder at different Reynolds numbers.

此外既有涡泡也可能因对流或其他数值误差造成过於靠近边界，因此我们也设计一专门处理过於靠近边界涡泡之方法，以其他计算元素取代这些涡泡，降低进入物体内部之环量，进而降低涡片强度计算上的扰动。

The story of these stamps began on may 14,1918,the day after they were placed on sale.in washington,d.c.,w.t.robey,a man interested in stamps,decided to buy a sheet of the new stamps and so went to the new york avenue branch post office in washington.when the clerk handed him a sheet of the stamps robey noted that they were poorly centered.he looked at other sheets and found that none was well centered.the clerk asked robey to return later in the day when more stamps were expected.

关于这些邮票的故事发生在1918年5月14日，该日是它们开始销售的第二天。在首都华盛顿，一个集邮爱好者，罗比，决定去买一整版新邮票，于是他来到华盛顿市纽约大街的邮政支局。当职员递给他一版新邮票时，罗比看到它们的中心位置很差。他看了其它几版，没有一个摆正中心位置。职员告诉罗比当天晚些时候来退换，估计那时有更多邮票到货。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我