vertical velocity coefficient 中文意思是什麼

vertical velocity coefficient 解釋
垂線流速系數
  • vertical : adj 1 垂直的，直立的，豎立的，縱的（ opp horizontal ）。2 頂上的，頂點的，絕頂的。3 【解剖學】頭...
  • velocity : n. 1. 迅速；快速。2. 速度，速率。3. 周轉率。
  • coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
  1. Numerical models are frequently used to simulate water flow in hydraulic engineering. shallow water equations are basic governing equations with assumption of the velocity distribution uniformly in vertical, so they have some limitations on the simulation of some plane flows, such as wind - induced flow, curve river flow and flow nearby the submerged dikes. for above - mentioned reasons, extended shallow water equations are developed by introduction of momentum coefficient, correction of convection and bed resistance in equations of motion

    在水利工程中經常需要採用數學模型模擬水流的流態，淺水方程是進行平面流態模擬計算的基本控制方程，但因其忽略了流速垂線分佈的不均勻性，在模擬某些平面流態（如風生流動、河灣水流、潛壩等工程附近的流動）時存在一定的局限性。
  2. Through the flume experimental research, the velocity distribution formulas for rectangular open channel have been found, including parabola form of velocity distribution on the vertical and power form of mean velocity distribution on the transverse direction ; meanwhile, the means of ascertaining correlative coefficient have been given in this paper

    摘要通過對明渠流速的水槽試驗研究，建立了矩形斷面明渠沿垂線流速的拋物線分佈公式和橫向平均流速的乘冪函數分佈公式，同時給出了相關系數的確定方法。
  3. By means of temporary stability of combining drift coefficient of angle sensor and through missile rotating two - position measurement, measuring rotating angle between the two positions by vertical sensitive axis x, and sensing the changes of ground velocity component between the two positions by horizontal sensitive axis and z, the position of the component is determined to realize the azimuth alignment before launch of tactical missile

    角敏感元件漂移系數具有短期穩定性，通過轉彈前後兩位置對組合的測試，垂直敏感軸計測轉彈過程中兩位置之間的轉角，兩水平敏感軸敏感計測地速分量在前後兩位置的變化，由此計算出部件當前所在方位，從而實現戰術彈射前的方位對準。
  4. The cost function of the optimal control problem is a weighted sum of the squared horizontal and vertical components of the helicopter velocity at touchdown. the control ( horizontal and vertical components of the thrust coefficient ) required to minimize the cost function is obtained using nonlinear optimal control theory

    其次，定義最優控制問題的性能指標為直升機著陸時的水平和垂直速度的加權平方和為最小，並採用一階梯度演算法得到使性能指標最小的控制規律。
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