查询词典 turbulence

Wingtip vortices make up the primary and most dangerous component of wake turbulence.

翼梢涡弥补的首要和最危险的部分尾涡。

Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.

基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。

The result demonstrates that the turbulence effect of vertical vegetation is larger than that of acclivitous vegetation, and much larger than lying vegetation.

分析表明，在来流条件相同的情况下，对流场的扰动作用依次为直立态植被＞倾斜态植被＞卧倒态植被。

Keywords: statistic advective diffusion differential-integral equation;transilient turbulence theory;climate diffusion model;climate phase space

中文关键词：统计平流扩散方程；Transilient湍流理论；气候扩散模型；气候相空间

According to the modified Rytov method for the optical wave propagation and withconsidering the effect of the turbulence spectrum model with zero and non-zero innerscale in addition to the finite outer scale, the solution to the scintillation index as afunction of the Rytov variance is obtained from weak to strong fluctuation regions forGaussian beam propagation along the horizontal path.

根据光波传播的修正Rytov 方法，得到了高斯波束水平传输时在零内尺度湍流谱模型及考虑湍流内尺度效应和外尺度效应条件下，从弱起伏湍流区到强起伏湍流区闪烁指数随Rytov 方差变化的计算公式。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

The fluid flows and heat coupled calculation method is used. The standards two equations turbulence models, velocity and pressure coupled arithmetic are used.According to the results of numerical simulation analysis the local coefficient distribution changes along the pin fins.Study the effection that its height and shape of the pin fins have on the average Nu and the average number of pressure loss coefficient Eu.The circle-shaped and elliptic-shaped pin fins have different circumcolumnar regional,therefore the mixed conditions are effected.

数值计算中采用标准双方程湍流模型，速度压力耦合算法；根据数值模拟的结果分析沿扰流元的局部换热系数分布变化，研究其扰流柱高度及形状对扰流柱通道平均努赛尔特数Nu和平均压力损失系数Eu的影响，圆形和椭圆形扰流柱的绕流尾涡影响的区域的不同对扰流柱群内流体混合状况的影响。

There are ENS changes in the secondary visceral pain following an acute colonitis and electroacupuncture analgesia can make the changes improved, internal environment stabilized and the turbulence of intestinal motility resumed.

在急性结肠炎继发内脏痛时可出现肠神经系统的改变，电针镇痛使这些变化得到改善以利于内环境的稳定，肠动力紊乱得到纠正。

The plug energy dissipater is applied to eliminate the bubbles taken place to the outflow of power plant cooling water. The hydraulic characteristics of the dissipater are studied both by model test and numerical simulation based on k-ε two-equation turbulence model.

从电厂排水口消能消泡消盐雾的机理出发，以模型试验和数值模拟等研究手段探讨了洞塞式消能工的流场和压力场等基本水力特性，获取了面积比0.4~0.8，相对长度比0.5~2.0的多种洞塞的局部阻力损失系数，并为工程应用提供了计算的经验公式。

Objective This essay mainly focuses on salving the acute jaw and face sinus infection with DIC patient , block ing the DIC vicious circle , improv ing the anoxic condition , correct ing the electrolytical turbulence and balanc ing the acid and alkali .

目的探讨对急性颌面部间隙感染合并DIC重症患者的抢救，阻断DIC的恶性循环，改善缺氧状况，纠正电解质紊乱及酸碱平衡失调。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。