查询词典 turbulent

Annular-aperture averaging factor of optical scintillations in turbulent atmosphere.

湍流大气中光波闪烁的圆环孔径平均因子。

Aperture averaging of optical scintillations in the turbulent atmosphere.

王惠琴，柯熙政，&自由空间光通信中的混合空时编码&，光学学报 29，

By solving the linearized atmospheric dynamic equation system including turbulent dissipation, the analytical solutions of wave drag and form drag over small scale terrain in a nocturnal stable boundary layer are obtained.

通过求解含有摩擦耗散的线性化大气动力学方程组，得到了在夜间稳定大气边界层中小尺度地形产生的波动阻力和形式阻力的解析解。

The rotation,form drag due to local topographic inhomogeneities,and weak but appreciablestratification are suggested to be possible sources for this discrepancy.The clas-sical wall-layer parameterization of the turbulent dissipation rate is found to holdwell for reversing flows,while modifications are needed for rotating flows.

分析表明，潮流的旋转、由局地地形造成的型阻以及水体的弱层化可能是上述差异产生的原因；3、经典的壁湍流理论以及湍封闭模型中经常采用的湍动能与其耗散率间的关系对于弱层化的往复型潮流是成立的，而在旋转型潮流中，壁湍流理论需要进行修正。

G. for formation flight, in-flight tanking it is required to generate two-dimensional field of turbulence, in which the turbulent wind speeds are stochastic functions of two coordinates e.

在飞行仿真的某些特殊情况(例如编队飞行、空中加油情况)下有必要生成二维紊流场，其中的紊流速度是两个坐标(例如沿飞行方向的x和沿翼展方向的y)的随机函数。

A three dimensional Navier Stokes equation is solved with a standard k ε turbulent model. Two experiments were carried out and the total pressure of jet flow was tested. Based on the tests, the differences between the calculated and test results were found to be 3% and 7% respectively. It proved that the results of calculation can well be used in engin...

研究采用数值计算和试验测量相结合的方法，控制方程为三维、雷诺平均 Navier- Stokes方程及 k-ε二方程的紊流模型，并且对该发动机进行了燃气流场的测试，对流场中的总压强进行了直接测量，进行了两次试验；在两次测点位置，试验结果与数值计算值相差分别为 3%和 7%；证明了对双喷管火箭燃气射流流场的数值计算具有了较好的精度，计算模拟结果可以用于工程设计中

There still exist turbulent,revolutionary undercurrents in this seemingly peaceful world.

在这个表面上和平的世界里，骚动与动荡的潜流依然存在。

It is shown that the M×N ChG beams in turbulent undergo three stages of evolution with increasing propagation distance,and turbulence accelerates the evolution of three stages.The turbulence results in a spreading and degradation of the maximum intensity in the far field.But β-parameter decreases with increasing beam numbers M,separate distances xd and beam parameter δ.And there exists optimal values of xd and δ,and SR of the corresponding M×N ChG beams reaches its maximum.

研究表明：在湍流大气中，双曲余弦高斯列阵光束的传输将经历三个阶段的变化，并且湍流使得光束传输经历三阶段的进程加快；湍流导致双曲余弦高斯列阵光束扩展、最大峰值光强下降，但是，β参量随光束数目M、相邻子光束间距xd和光束参量δ的增加而减少，即光束扩展受湍流的影响减小；并且，存在最佳xd和δ值使得Strehl比取得极大值。

Each day, black fly rise from turbulent stretches of the river.

每天，成千上万的蚋从奔腾的河水中羽化

But this is the case in Simon Mawer's eighth work of fiction,"The Glass Room", which is inspired by the Tugendhat Villa in Brno and spans 60 years of Czechoslovakia's turbulent history.

但这样的景象出现在了西蒙马维尔的第八本小说《玻璃屋》中，其创作灵感源自伫立在布尔诺市的历经60年捷克风风雨雨的图根哈特别墅。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐