查询词典 vortex

Test and analysis show that, the distribution patterns of the tangent veloctiy fields in the big cone area and the small cone area, which are comprised of para-free vortex and para-forced vortex, are basically identical without a change of the radius of the boundary surface; with the increase of the angle of the small cone, the para-free vortex area decreases and the para-forced vortex area increases, and the emulsifiability of the fluid drips increases with the increase of velocity gradient; the tangent velocity increases with the increase of inlet flow, and the maximum tangent velocities of both the big cone area and the small cone area are 4.94 times of the inlet flow; and the maximum tangent velocity increases with the increase of the split ratio and with the radius of the boundary surface not changed.

试验分析表明，大锥段和小锥段切向速度分布规律基本相同，均由准自由涡和准强制涡构成，分界面半径rm没有变化；随着小锥角θ的增加，准自由涡区缩小，准强制涡区扩大，速度梯度增加会加大液滴的乳化程度；随入口流量增加，切向速度增大，经拟合得出大锥段和小锥段的最大切向速度均为入口流量的4.94倍；分流比加大，分界面半径基本不变，最大切向速度增加。

Population viability analysisWhen the parameters of the estimative and forecast population number of Gloydius shedaoensis have been put into VORTEX 9.42 software,we can obtain the better fitting results with the present observation value.

种群生存力分析将估计和预测的蛇岛蝮种群数量参数输入VORTEX 9.42软件后，得到了与目前的观察值较好的拟合。

And obtain an analogy result of Kazdan and Warner's, and then we use our theorem to study the vortex equation in Holomorphic line bundle over non-Kahler complex manifolds.

在第三部分我们考虑了一类Kazdan-Warner型的方程，并且证明了一个存在性的定理，借助于这一结果我们给出了一般的紧复流形M上的全纯线丛上的vortex方程解的存在性的一个充分性条件，或许这一考虑有其它方面的作用的。

Secondly, three kinds of mathematics model of optical vortex beams were introduced here. Then the propagation dynamics of optical vortex beams through the non-axis symmetry system is studied, this chapter includes the introduction of the symmetry vortex beam and the non- symmetry vortex beam, the deduction of the Collins diffract integral formula for the non-axis symmetry system, and the transformation of the vortex beam passing through the non-axis symmetry system has been described by using the numerical simulation. Then the general calculation for the orbit momentum of vortex beams, the matrix form for the orbit momentum of vortex beams, and the photon method to describe the orbit momentum of vortex beams are also introduced here. Finally, the interference about optical vortex beams was studied.

本文对涡旋光束进行了较为全面的介绍和研究，主要内容包括：（1）光学涡旋光束的基本理论，主要是介绍了单个光学涡旋光束在柱坐标中的一些表征，涡旋光束的奇异相位和光学涡旋的相位结构；（2）光学涡旋光束的三种数学模型；（3）光学涡旋光束在非轴对称光学系统中的传播动力学，其中介绍了对称涡旋光束与非对称涡旋光束，推导了非轴对称光学系统的 Collins 衍射积分公式，并利用计算机模拟图描述了对称涡旋光束经过非轴对称光学系统后涡旋形态的改变；（4）涡旋光束轨道角动量的一般计算，涡旋光束轨道角动量的矩阵形式，光子法描述涡旋的轨道角动量；（5）涡旋光束的干涉。

In this thesis, we first introduce the basic knowledge concerning the structure and theoryfor vortex system.

在本论文中，我们首先简单介绍了涉及vortex体系结构，各种现有理论的基本知识。

At last, the paper aims at the shortcomings of current VR development tools and VARE and addresses the emergency of the incorporation of modeling and simulation tools from physical based simulation into virtual reality to build authentic virtual environment, then introduces the attempt in this field using WorldToolKit and Vortex.

本文以碰撞检测和动力学仿真为主要研究内容进行探讨，并利用WorldToolKit与动力学仿真引擎Vortex在这一研究领域做出了有益的尝试。

The rolling-up of the leading-edge vortex sheet and interaction with the trailing-edge vortex are simulated numerically by using the two-dimensional unsteady analogue and vortex-in-cell method.

本文应用二维非定常比拟和恪子涡(Vortex-in-Cell)方法，数值模拟了三角翼前缘涡层的卷起以及与尾涡的相互作用。

In this way it is easy to establish the parallel frame of curves in any dimension space.One of the application of the parallel frame is that it can prove the equivalence between the vortex filament equation and the non-linear schrodinger equation.

建立曲线的平行标架的一个应用是可以证明Vortex filament方程和非线性Schrodinger方程表示的是同一个方程。1906年，Leivi-Civita的学生da Rios写了一篇硕士论文，关于漩涡在粘稠液体里以曲率大小的速度沿着副法线的方向运动的模型。

By constructing a generalized function"helical solitary vortex function", the paper solves the stream function of the helical vortex tube with the help of vortex filament one, and obtains some analytical expressions for large single-vortex core and small multi-vortex core.

通过构造一类特殊的广义函数&螺旋孤涡函数&，解决了利用涡丝流函数求(来源：75AB67C论文网www.abclunwen.com)解涡管流函数问题，导出了大单和小多螺旋涡管流函数的解析解。

It is indicated that this loss will not change with the increase of the Reynolds number but the intensity of the passage vortex increases with the decrease of the Reynolds number. The tip leakage flow will weaken with the increase of the passage vortex because of the interaction between the passage vortex and the tip leakage vortex, and the position of the tip leakage vortex is more close to the middle of the passage. In addition, the distributions of the total pressure loss and the flow angle at the exit of the cascade are influenced by the intensity and the position of the tip leakage vortex.

结果表明：对于间隙存在造成的流动损失，数值模拟结果与实验结果及 Denton的预测值都十分接近，基本上不随着雷诺数的变化而变化；但是，随着雷诺数的减小，通道涡增强；间隙泄漏涡在和通道涡的相互作用中，强度减弱，在叶栅出口处的位置更加靠近中叶展；出口处的总压损失和气流角的分布也由于间隙泄漏涡强度和位置的变化而发生改变。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。