Results show that the variation method is a efficient way to retrieve 3-d wind field data from Doppler radar data.
分析结果表明，变分法是一种较为准确的从雷达资料中提取三维风场的方法。
Moviegoers at Baghdad's first 4-D cinema get an extra thrill from shaking seats and wind machines during a 3-D sci-fi film.
电影爱好者们在巴格达首个4D电影院观看3D科幻电影，观众可以通过影院提供的摇动座椅和风声器获得特别的感官刺激。
This paper presents a 3-d wind resistant design method satisfying comfort requirements of residents of tower buildings with rectangular cross-section.
本文探讨了矩形塔式高层建筑满足人舒适要求的三维抗风设计方法。
The data processing and variational algorithm for 3-D wind field retrieval by bistatic Doppler radar network are developed and bias of retrieved wind is analyzed.
研究了双多基地多普勒雷达资料的配对方法、风场反演的区域和精度，并研制了基于三维变分方法的双多基地多普勒雷达系统的风场反演系统。
The digital simulation results shows that the method can be used to provide the 3-D wind field at low altitude and is applicable for analyzing the dynamics characters of flights atl…
该方法可以提供低空三维风场模型，并能满足分析飞机低空飞行动力学特性的需要。
The digital simulation results shows that the method can be used to provide the 3-D wind field at low altitude and is applicable for analyzing the dynamics characters of flights at low altitude.
该方法可以提供低空三维风场模型，并能满足分析飞机低空飞行动力学特性的需要。
There appears some flexibility at the top of tower with high ratio of height to diameter (H/D), caused by wind load.
高径比（H/D）较大的塔在风载荷的作用下，在塔顶处会引起一定的静挠度。
From the two points of view, this paper gives a calculation method for the unsteady aerodynamic characteristics of the wind turbines including the 3-d rotational effects.
本文的研究将这两者结合起来，给出考虑旋转影响的风力机非定常气动特性的计算方法。
The air resistance of damper of 1-dimension trajectory correcting fuses (1-D TCF) is measured under pill angle of attack and low wind speed.
一维弹道修正引信阻力器空气阻力的简捷测量，是在弹丸零攻角、低风速下测量空气阻力的试验方法。
Particle Image Velocimetry (PIV) Measurements were carried out on a 2-d flow field around the greenhouse in the atmospheric boundary layer wind tunnel.
在大气边界层风洞中，利用粒子图像速度场仪(PIV)对风绕过二维温室的流动进行了流场测量。
The research work is a part of the National Natural Science Foundation project "research on the dynamic characteristics of wind turbine in 3-d turbulent wind fields".
论文的研究是国家自然科学基金项目“三维紊流风场作用下的风力机动态特性研究”的一部分。
Calculational results of unsteady loads on the wind turbine blade show that the calculation is improved by the 3-d rotational effect.
通过算例表明，当这一三维旋转效应应用于叶片非定常气动特性计算时，能大大改善计算结果。
With wind turbine blades as the research object, this thesis elaborates their programming design, CAD system development, 3-d entity modeling, and dynamics analysis.
本文以风力机叶片为研究对象，在叶片的程序化设计、CAD系统开发、三维实体造型和动力学分析等方面进行了研究。
With wind turbine blades as the research object, this thesis elaborates their programming design, CAD system development, 3-d entity modeling, and dynamics analysis.
本文以风力机叶片为研究对象，在叶片的程序化设计、CAD系统开发、三维实体造型和动力学分析等方面进行了研究。
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