time varying coefficient 中文意思是什麼

time varying coefficient 解釋
隨時間變化的系數
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • varying : 變化的
  • 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. The time - varying parameter ( tvp ) model is put forward to estimate the dynamic coefficient of fiscal expenditure to economic growth, and further to evaluate the effectiveness of fiscal policy

    摘要利用狀態空間方法，對1978年以來我國財政支出總量和有關項目的經濟產出進行了動態測算。
  2. Based on the investigation with several voltage control methods, such as venturini method, instantaneous double - voltage synthesis method and space vector modulation method ( svm ), three new control strategies are put forward. firstly, a time - varying modulation coefficient svm method is proposed to improve mc ' s anti - disturbance performance under the asymmetry input voltage. secondly, a 5 - state switching strategy is presented for mc controlled by the svm method, which reduces the commutation number and switching losses remarkably

    在分析了venturini控製法、瞬時雙電壓法、空間矢量法等電壓控制方法的基礎上，提出了在非對稱輸入條件下矩陣變換器空間矢量法的時變調制比改進控制策略，提高了變換器的抗干擾性能；對空間矢量法的開關策略進行了研究，提出了新型5狀態開關策略，在保證其他性能不受影響的條件下，減少了變換器的換流次數和開關損耗；提出了一種矩陣變換器單電壓合成的新方法，它不僅使得變換器的控制簡單，計算量減少，而且使得開關損耗達到最少。
  3. Comparing the fitted expression with the established theory expression of the angular velocity, the equivalent viscous damping coefficient is gained. the closed form algorithm of the state space method is employed to solve the system dynamic equation with time - varying coefficients. the dynamic problem of a linkage mechanism with four joints is taken as example to show that the presented models and methods are correct and practicable

    引入求解線性微分方程的狀態空間法，並對其求解時變系統運動微分方程的具體步驟進行了推導；在此基礎上將實測獲得的運動副等效粘性阻尼系數代入系統動力學方程，求解后獲得了考慮運動副阻尼的平面彈性四連桿機構的模擬結果；結果表明運動副的阻尼在一定程度上對振動具有抑制作用。
  4. The linear periodic time - varying vibration system can be changed to a constant coefficient linear system by l tansformation

    摘要線性周期時變齊次系統的狀態方程經李亞普諾夫變換后，周質系數線性時變振動系統轉化為一非齊次定常線性系統。
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