Up and down drafts ( vertical speed ) up to 30 - 35 meters per second 上升下降气流(垂直速度)达到30到35米/秒。
The key to improving long jump performance is to command the reasonable rhythm of the final two - step run - up in the premise of keeping up high - speed run - up so as to reach most suitable vertical speed and prancing angle 摘要在保持高速助跑的前提下,掌握合理的最后二步助跑节奏,从而获得适宜的垂直速度和腾起角度是提高跳远成绩的关键。
To further the study of the take - off technical theory in the backstyle high - jump , we make a research into the cuved tosbury take - off cour se of backstyle high - jump . it was pointed out that the backtyle high - jump cucve d run take - off created efficient condition for the earlier change and accumla tion of gravity center and vertical speed of fosbury flop the moving direction t he bady 为进一步研究背越式跳高起跳理论,对背越式跳高弧线助跑起跳过程进行分析,揭示背越式跳高的优越性在于充分发挥和利用助跑速度提高起跳效果,其实质是弧线助跑起跳为背越式跳高身体重心运动方向的提早转变和垂直速度的累积创造了有利条件。
2 - d fourier technique could compute horizontal and vertical speed of cloud motion in the same time , so it can avoid the error caused by 1 - d moving supposition in the 1 - d fourier technique . in this part , the 2 - d fourier technique theory was introduced , and a numerical simulation was given in this paper . in the third part , we compared the 2 - d fourier technique with the 1 - d fourier technique , analyzed their problems and found ways to resolve them 用二维傅立叶相位分析法导风,同时计算水平和垂直方向的风速,能够避免一维傅立叶相位法导风中一维平移假设带来的误差,文中介绍了二维傅立叶相位法导风的基本理论和风速计算方法,并给出二维傅立叶导风技术的数值实验。