查询词典 stokes

The domain derivative of the Navier-Stokes equations is given in the same manner as the Stokes equatons' domain derivative by reducing to homogeneous equations and proving continuous character and existence of Frechet derivative .

同样利用对非齐次方程的齐次化、证明目标函数对区域的连续性和其导数的存在性，同时给出了定常Navier-Stokes方程的区域导数完整的理论证明。

The second part is devided into two chapters, it\'s main aim is to study the global solutions to 1-d compressible Navier-Stokes equations, and it is organized as follows:In Chapter 2, we introduce the second boundary value problem for the compressible Navier-Stokes equations in the half space.

第二部分分为二章，主要讨论一维可压Navier-Stokes方程整体解的存在性，其中：第二章讨论了不可渗透问题(流体的速度在边界上为0情形)，其中对温度给出了第二边值条件。

By using the second order Stokes wave theory,the wave force is calculated and the method to deduce the formula of the second order Stokes wave force spectrum is explored.

本文基于二阶Stokes非线性波浪理论探讨了采用非线性波浪理论时随机波浪力谱的计算方法，并用一典型算例，对本文公式的计算结果与线性波理论的计算结果进行比较。

By using the second order Stokes wave theory, the wave force is calculated and the method to deduce the formula of the second order Stokes wave force spectrum is explored. A representative example is given and the results horn calculation are obtained in the form of curves for comparison.

本文基于二阶7Stokes非线性波浪理论探讨了采用非线性波浪理论时随机波浪力谱的计算方法，并用一典型算例，对本文公式的计算结果与线性波理论的计算结果进行比较。

Although the dispersion of particles with the Stokes numbers far less than or of the same order of 1 are insensitive to the changes of inlet velocity differences, the dispersion of particles with Stokes number much larger than the order of 1 are influenced by the coherent structures under U〓/U〓=α=0, where α=0 means the particles are released into the flow in stationary state.

在目前国内开展三维N-S方程大涡模拟还非常困难的情况下，本文以两相平面湍射流为对象，不采用流动对称性假设，成功地用大涡模拟方法预报了平面湍射流拟序结构的产生、发展及大涡的合并破碎全过程，和F.O。

Defined circulation, introduced Stokes theorem, and gave an arm waving proof for Stokes theorem.

定义环流，介绍Stokes定理，并用动作来演示。

With the development of combustion research and the temperature measurement as well as relevant techniques, the flame temperature measuring techniques begin to enter the common industry fields from labs, and extend to the aviation and aerospace industry. At the beginning of the 1980s, the Ijumdien Institute in Holland began to develop many industry flame temperature measurement installations based on thermal couples. And later, the National Aerospace Administration also successfully employed the Coherence Anti-stokes Raman Stokes in the flame temperature diagnostic of the precombustion chamber of space shuttle main engine (SSME, liquid H〓/O〓 propellant).

随着燃烧研究的深入和温度测量及其相关技术的不断发展，从1980年，火焰温度测量技术开始由实验室走向工业现场、从一般工业现场走向航空航天领域：欧洲以荷兰的Ijmuiden研究所为代表，研究开发了很多基于热电偶的工业燃烧火焰温度测量装置；美国国家航天局则成功地将相干拉曼斯托克斯方法用于航天飞机的主发动机（SSME，液氢液氧发动机）预燃室燃烧火焰温度诊断上。

The shoaling wave height is related to wave steepness. Comparing with wave theories the shoaling coefficient of small amplitude wave theory_ which is not related to wave steepness, disagrees with experimental reset. The experimental result has the trend with Stokes third order shoaling theory, but Stokes wave theory overestimates the shoaling coefficient .

波浪之浅化波高与波浪尖锐度有关，微小振幅波理论中浅化波高与波浪尖锐度无关与实测值不符，实验结果在定性上与Stokes波三阶浅化理论有相同之趋势，但在定量上实验之浅化系数较小，理论值有高估的现象。

Barium nitrate crystal was grown by the aqua-solution cooling method with the size of 48 mm×10 mm×10 mm.When the pump laser energy is 65 mJ,the output energy of first Stokes laser(563 nm) and that of second Stokes laser(599 nm) were measured as 21 mJ and 16 mJ respectively.

在泵浦源达到65 mJ时，获得21 mJ一阶斯托克斯光，输出波长为563 nm，以及16 mJ的二阶斯托克斯光，输出波长为599 nm，受激拉曼散射SRS最大的整体转换效率(包含一阶、二阶斯托克斯光之和)为56.3%。

We note from the further studies that in the crystals, which sharing the similar crystal structures and coordinational environments, the magnitude of the Stokes shift of the luminescence of the dopant ion is in line with the average covalency of the replaced lattice site. This is because that the nature of Stokes shift is the energy transfer from the luminescent ion to the host lattice. The value of this energy is determined by the frequency of the host lattice in which the frequency is controlled by the chemical bond characters.

更深入的研究发现，在晶体结构和中心离子配位环境非常相似的系列晶体中，掺杂离子发射光的Stokes位移值与其所取代格位的平均共价性成正比的关系，这是由于Stokes位移的本质是发光离子在发光过程中向基质以光波辐射的形式传递能量，这一能量的大小是由基质的振动频率决定的，而基质的化学键性质恰恰决定着基质的振动频率。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。