查询词典 Stokes theorem

The linear dispersion relation of the enhanced equations is the Pad\'{e} [4,4] expansion of the linear Stokes dispersion relation, the accuracy of which is acceptable even when the relative water depth is as large as 1.0. Its nonlinear property and shoaling gradient are also improved.

改进后方程的线性色散关系达到了一阶Stokes波色散关系的Pad\'{e}[4，4]近似，在相对水深达1.0的强色散波浪时仍保持较高的准确性，并且方程的非线性和线性变浅率都得到了不同程度的改善。

In shoaling process, the main peak frequency of broken wave spectra moves to lower frequency. With decreasing relative water depth, both the ratios of wave spectral energy at twice and triple peak frequency to main peak frequency increase. and when the value of the nonlinear parameter increases, both the ratios increase, too. The Stokes third order wave theory has the same tend but overestimates the value quantitatively.

波浪浅化时，碎波后主频频率有往低频移动之现象，且波浪进入浅水区，相对水深减小，非线性参数Ursell number越大时，二倍主频及三倍主频与一倍主频能量比值均有增加之现象，与 Stokes三阶理论有相同之趋势，但实验之比值在定量上小於Stokes三阶理论值。

Based on the 3D time-average Navier-Stokes equations, k-ε model was used to simulate the 3D turbulent flow field of whole flow passage in the Francis turbine including guide wickets, runner and draft tube. The energy performance and cavitation performance were predicted from the simulation results, and the calculated data were compared with the results of hydraulic turbine model experiment. The calculation of turbine efficiency and the measured efficiency was very closed and the maximal relative error was 0.9%.

该文基于Navier-Stokes方程和k-ε紊流模型，采用贴体坐标和交错网格系统，用SIMPLEC算法对一模型混流式水轮机引水元件、转轮和尾水管进行了联合计算与转轮单流道计算，数值模拟了水轮机各通流元件内部三维湍流流场，预测了水轮机的能量性能和空化性能，并与水轮机模型试验结果进行了对比。

A harmonic of Nd:YAG laser(532 nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser.Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer.The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd： YAG的532 nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10 mm×10 mm×48 mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

A harmonic of Nd:YAG laser (532nm) pumped barium nitrate crystal in external resonator and excited stimulated Raman laser. Experimental setup adopted the Raman shifter consisted of external cavity and two prisms spectrometer. The external cavity was composed of diachronic mirrors with optimal reflectivity for Stokes components. Barium nitrate crystal was grown by the aqua-solution cooling method with the size of 48mm×10mm×10mm.

采用单端泵浦的外置拉曼振荡腔与双棱镜分光装置进行了硝酸钡晶体拉曼激光实验，泵浦源为倍频Nd：YAG的532nm激光，硝酸钡晶体通过水溶液降温法生长，尺寸为10mm×10mm×48mm，采用特殊镀膜的腔镜对各阶斯托克斯光进行优化选择。

Stirring characteristic of metal bath in the DC arc furnace with different bath parameters was studied by combining Maxwell's equations with Navier-Stokes equations.

通过将直流条件下的Maxwell方程和Navier－Stokes方程相结合，研究了熔池参数变化对炉内熔体搅拌产生的影响。

The results show that energy can be extracted from pump beam when power density of Stokes beam is more than that of pump beam.

而且研究表明，随着斯托克斯光功率的增大，从抽运光中提取出的能量越多。

The energy threshold of the first Stokes is calculated according to an approximate theory including the effect of focused pump beam and beam quality.

根据考虑泵浦聚焦和泵浦光束质量影响的近似拉曼散射理论计算了泵浦阈值的理论曲线，并与实验数据和有关文献进行了比较。

There exists a maximum for the amplification of high-power Stokes beam which is restricted by the energy of pump beam, the absorption coefficient of medium and the length of medium cell, etc.

通过优化介质池长和介质吸收系数等参量可以提高斯托克斯光放大的最大值，并获得较高的能量提取效率。

RS comply with the special growth law,does not have" threshold "characteristics.lt depends not only on the intensity of pump beam but also on the intensity of Stokes beam itself.

tokes束的增长不仅依赖于泵浦波的强度，而且也和自身的强度有关系。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。