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- Keywords complex terrain;surface wind;frequencies of wind;diurnal variation of wind speed;analysis of wind fiel; 复杂地形;地面风;风频;风速日变化;流场分析;
- variation of wind speed 风速变化
- However, in the case of non-zero attack angle, the flat box deck becomes bluff, the variation of its flutter critical wind speed is accordingly undulant as the wind yaw angle increases, and the lowest value will occur generally under skew wind. 而对于非0°风攻角的情况，扁平箱形断面的流线性变差，随着风偏角的增加其颤振临界风速呈起伏变化，最低值一般在斜风的情况下出现，此时，传统的平均风分解方法不再适用。
- The exponent P is a function of wind speed, ground roughness, stability, etc. 指数P是风速、地面不平度、稳定度等的函数。
- Area of wind of big range ion, wind speed zephyr measures OK adjustment. 大领域游子风区,风速和风力能够调解。
- We need to work on our boat speed but it is difficult with the square boat below 9 knots of wind speed. 我们需要改进的是我们的速度,因为方形的船确实不适合在9节风以下的情况下行驶。
- The duration variation of the current field induced by SE wind of 6? m/s and the characteristics of stable flows under the action of wind of 4? m/s in 6 directions, including E, W, S, N, ESE, and WNW, were studied. 应用浅水湖泊风生流计算的二维有限元数学模型;对玄武湖风生流进行了数值模拟;并研究了玄武湖6m/s东南风风生流的历时变化特征及4m/s6种风向(E;W;S;N;ESE;WNW)下的稳定风生湖流特征.
- Besides, the effect of seasonal variation of wind stress, Ekman pumping and horizontal diffusivity on the ocean current and heat budget are studied, using both ideal model and complex model. 在此基础上，利用理想化的数值试验与数值模拟结果相结合的方式，证实了风应力的季节变化和Ekman抽吸，以及水平热量扩散系数对北印度洋海洋环流和热收支的影响。
- Special structure, excellent water-eliminating performance, adaptable to wide range of wind speed. 结构独特,挡水性能极佳,适用风速范围广。
- A 10% reduction of wind speed was observed, however, the reduction is well within the natural wind variability of the storm. 曾观测到风速减小10%25的情形,然而这一减小量完全落在风暴中的风的自然变率范围内。
- The song sounds like a variation of a very old and familiar tune. 这首歌像是一个熟悉的旧曲调的变奏曲。
- Design and make a wind turbine which can adjust pitch angle of oar leaves through various of wind speed, and make experiment of characteristic. 通过计算,设计制造出了风压式全程变桨距风能转换装置。
- A gust of wind blew the door shut. 一阵大风吹来，把门关上了。
- Helicity is a good indicator for variations of wind field with altitude. 螺旋度可以作为观测雷达站上空风场随高度变化的一个敏感因子；
- Impact in variation of line impedance. 系统阻抗变化之影响。
- Through analyse on cooling path of motor, distribution of wind scalar, wind speed and pressure difference of a motor operating at the ratings is obtained. 通过对电机冷却风道进行分析研究,得到电机在额定工况下,电机内部风量分布、速值和压差。
- A variation of ten pounds in weight. 在重量上十磅的变化量
- The variation of the corrections is typical. 修正值的变化情况是有代表性的。
- The key of MPPT(Maximum Power Point Tracking) is to adjust the rotate speed of wind turbine quickly according to the variable wind speed for high efficiency. 变速风力发电机高效利用风能所需的风能最大功率点追踪(MPPT)算法的关键在于能否根据风速变化快速调节风轮转速,使其迅速达到相应的最佳转速。
- Diurnal variation of UV Index on a sunny day. 在阳光充沛的日子里,紫外线指数的日际变化。
