查询词典 wind shear

Wind shear occurs because of the greater friction presented by water surface slowing the flow of air, a difference in true wind creates a different apparent wind at different heights.

风切变的发生是因为更大的摩擦提出水面放缓的气流，一个真正的差异造成了不同的风明显风在不同的高度。

Evidence suggests that 1 under more stable stratification, the basic flow, if moving faster at low and high levels (particularly in the presence of jets there), allows a resulting meso-β unsteady wave to propagate eastward with respect to basic flow and even at greater velocity compared with it; 2 vertical windspeed shear of basic flow causes instabilities of the TWT perturbation; 3 considering the second derivative of basic-flow wind with respect to z (denoted by zz≠ 0 which is simply given as β* hereafter) the expression for the phase velocity of vortex Rossby wave is obtained, which is unidirectional in propagation with respect to basic flow; 4 VRoW has its physical origin from β*, i.e., from z-varying heterogeneities of y-direction averaged vorticity of the basic flow field; 5 VRoW phase velocity is associated with zonal wave number k, its energy is dispersive and the group velocity exists in the x direction; 6 when windspeed meets the condition of β*, TWT disturbance instability may be that of mixed VRoW and gravity wave; 7 if basic flow is subject to linear shear but does not meet the condition of β*, the TWT instability is that of inertia-gravity wave.

在大气层结比较稳定的情况下，如果基本气流在低层和高层较大(有可能存在低空急流和高空急流)，此时产生的β中尺度不稳定扰动相对于基流向东传播，甚至于快速向东传播。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次切变，可以得到涡旋Rossby波的相速度表达式，涡旋Rossby波相对于基本气流是单向传播的。涡旋Rossby波产生的物理根源是基本流场的风速二次切变，亦即基本流场y方向的平均涡度在空间z方向上的不均匀所致。涡旋Rossby波的相速度与纬向波数也有关，它的能量是频散的，其在纬向x方向也存在群速度。在基本流场的风速存在二次切变时，横波型不稳定可能是混合的涡旋Rossby重力波的不稳定；而在基本流场的风速仅仅存在线性切变，不存在二次切变时，横波型扰动的不稳定则是重力惯性波的不稳定。

Firstly, through the theoretical analysis of the flexible-oared wind generator, mechanics model of this wind generator is created. Then the formula about absorbing power of the wind generator is deduced, which is the foundation of base size being determined while different grades of the wind generators are designed.

首先，通过对柔性桨风力发电机原理分析，建立了该风力发电机的力学模型，并以这一力学模型为基础，推导出了该风力发电机的吸收功率公式，以此作为设计不同功率柔性桨风力发电机时，确定其基本尺寸的依据。

The structure and primary parameters of direct-detection Doppler lidar are described. The beam scanning method of atmospheric wind measurement is given,and computing formula of the three dimension wind filed is derived. The solution method of errors of wind velocity and wind direction is presented.

介绍了直接探测多普勒激光雷达的系统结构和主要参数，给出了该系统进行大气风场测量的光束扫描方法，详细推导了三维风场的计算公式，给出了其风速和风向误差的求解方法。

ZHOUSHAN is sea area which fertility is tiptop in our country. Sea surface wind is important factor of influencing contrail of excursion oil and culturist So investigating sea surface wind of ZHOUSHAN and setting up numerical forecast model which fits this sea area can offer tool for study sea wind in this area and let us has a mensurable acquaintance ship of effect degree of physics factors which effect sea surface wind in ZHOUSHAN sea area and acquaint oneself with physic process.

而海面风是影响溢油油团漂移轨迹和养殖业的重要因素，因此，对舟山海域的海面风进行研究，建立适合此区域的数值预报模式，可为研究该区域海面风作用过程提供数值预报工具，使我们对近海区域海面风场作用中物理因子的影响程度有更定量的认识，并对物理过程和影响机制有更深刻地了解。

Several methods of deriving horizontal wind fields from satellite temperature data are analyzed and compared in this paper, including the calculation methods of geostrophic wind, gradient wind and balance wind.

本文分析和比较了利用卫星温度资料计算水平风场的方法，包括地转风、梯度风和平衡风的计算方法。

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你看看这款这是我们的最新产品 Y：我不喜欢别人推荐的，一般都不是好东西 E：百闻不如一见现在就让我给你介绍一下它的神奇功能这款吹风机具有快速风和自然冷风两档风速调节，热风吹干冷风定型你想让你的头发成什么型它就能吹出什么型 Y：我想给我的男朋友吹头发，大概你这么长，发质和你差不多 E：为了展示我们这款吹风机的神奇功能现在就由我为你亲自示范 Y：等等等等，，，，你的头发都是干的我怎么能看到效果呢 E：你觉得怎么样？

The upper-level wind above Korea was usually the westerly wind, while the low-level wind was the northwesterly wind.

在沙尘天气过程中，在韩国附近高低层都形成了西北气流，其气流有利于输送沙尘。

1 Oven order 5.1.1 first hearth cloth Wind board laying 200mm thickness of the bed material; About Revert cloth laying Wind board thickness 200mm bed material, to prevent Ogive burn plug secondary air pipe; 5.1.2 prior to Add a small amount of flammable wood furnace and left and right back Feeder, ignition Wind Road in oven two days before ignition; 5.1.3 ignition started Ovens need to use a small amount of diesel added to the accumulation of wood, wood ignition when combustible, wood drying to around 200 ° C, according to adjust primer wind baffle and then curves of thermal insulation and heating.

5.1烘炉顺序 5.1.1先将炉床布风板上铺设厚度为200mm的床料；左右返料器布风板上铺设厚度200mm床料，防止把风帽烧坏，堵塞二次风管； 5.1.2事先将少量易燃木柴放入炉膛和左、右返料器，点火风道应在烘炉前2天进行点火； 5.1.3开始烘炉点火时需要用少量的柴油加在堆积的木柴上，点火时木柴易燃烧，木柴烘至200℃左右后，根据情况调节引风挡板，再按升温曲线保温、升温。

Through onflow κ-ε equation and structuralization are not even reseau, the simulation of model of numeric wind tunnel that uses test and verify of wind tunnel experiment 4 punch position is different, but the light steel architecture with same size, be based on load of above model wind to distributing the configuration that puts forward to defy wind actively.

通过湍流κ-ε方程和结构化非均匀网格，采用风洞实验验证的数值风洞模型模拟了4个开洞位置不同，但尺寸相同的轻钢建筑，并基于以上模型风荷载分布提出主动抗风的结构形式。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。