時間矢 的英文怎麼說

中文拼音 [shíjiānshǐ]
時間矢 英文
time vector
  • : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : Ⅰ名詞1. (箭) arrow 2. (尿) excrement; dung; feces 3. (姓氏) a surname Ⅱ動詞(發誓) vow; swear
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  1. The average flight time becomes a second vector

    平均的飛行做為第二個量。
  2. On the other hand, it is indicated that the velocity field consists of a depth - independent inertial oscillation and a time - mean shear flow, which can be obtained by subtracting the inertial oscillations time mean in one inertial period. the hodograph of the velocity vector of time - mean flow at the different depths consists of a ekman spiral, and the surface velocity is 30. 3 ? to the right of the wind

    一維模式的流場結果表明,混合層中的流場是由慣性波動與平均流兩部分疊加而成,且通過平均消去慣性波動后得到平均流,其不同深度的流速量構成一ekman螺旋,表層流速量相對風向右偏了30 . 3 』 。
  3. From the model, we can solve and gain the values and change orders of charging current, charging voltage, discharging current, discharging voltage and inductive current. after that, the electromagnetic fields can be created from two circuits " currents, and their magnetic rector and flux can be simulated from ansys solver

    用ansys multiphysics模塊求解出充電電流、充電電壓、放電電流、放電電壓和感應電流以及這些參數隨變化的規律:然後利用兩個迴路的電流耦合出電磁場,並模擬出磁量、磁通密度。
  4. For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions

    針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機,本文提出一種基於六個離散位置信號的自同步svpwm (電壓空量法)控制方法,用以削弱電磁轉矩脈動,分析了實現這種方法的主要控制環節,包括起動電壓空量的初始定位,阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。
  5. When the accelerating time of frequency is equal to zero, this paper discusses the gain of inventer - induction motor under the vector controlled and non - vect or c ontrolled. at the same time, this paper discusses it while the time of slope is no t zero. the m othod of the slippery and difference is introduced in this papaer for designing the system contained inv - m

    討論了頻率加速為零量控制和非量控制兩種情況的通用變頻器異步電動機的傳遞函數,同也討論了斜坡給定不為零的通用變頻器異步電動機傳遞函數,介紹了滑差限定的方法,為設計含有inv - m的系統提高提供了理論依據
  6. Abstract : when the accelerating time of frequency is equal to zero, this paper discusses the gain of inventer - induction motor under the vector controlled and non - vect or c ontrolled. at the same time, this paper discusses it while the time of slope is no t zero. the m othod of the slippery and difference is introduced in this papaer for designing the system contained inv - m

    文摘:討論了頻率加速為零量控制和非量控制兩種情況的通用變頻器異步電動機的傳遞函數,同也討論了斜坡給定不為零的通用變頻器異步電動機傳遞函數,介紹了滑差限定的方法,為設計含有inv - m的系統提高提供了理論依據
  7. Considering the vectorial property of the time - average energy flow density, a new extensive definition of the light intensity has been proposed. it is expressed as the time average of the amount of energy which crosses in a unit time and a unit area, so it can be applied to measure quantity of the light intensity at any curved surface

    對于非傍軸標量光場能量傳輸規律的描述則必須考慮其能流密度的量特性,應當採用光強的精確定義? ?單位單位面積上所流過能量的平均值來精確地描述某一橫截面上的能流,這也與光強的實際測量值是一致的。
  8. Rapidly over the flow vector time limit for the same two licenses rid looking out

    在迅速流里把2張相同的牌翻找出來清除掉
  9. The control tactics of space voltage vector are investigated, and the simplified algorithm which judges the sector location of reference vector and calculates switch operation time is put forward. by analyzing the current hysteresis control, the relation between switch frequency, and hysteresis bandwidth and input inductance of pwm rectifier is deduced. by applying instantaneous power theory, the principle of pwm rectifier power control is analyzed, and the direct power control by matlab toolbox through estimating active power and reactive power with virtual flux is realized, and the simulation results prove that it is correct

    對常用空電壓量控制策略進行分析,提出了給定參考量所在區判斷的簡化方法,以及電壓量作用的求取方法;分析了電流滯環控制策略,推導出開關頻率與滯環帶寬以及整流器輸入電感之的關系;應用瞬功率理論分析pwm整流器功率控制原理,通過虛擬磁鏈估計有功功率和無功功率,用matlab實現了直接功率控制,並驗證了該控制方法的正確性。
  10. This thesis proposed a real - time detection method for fundamental negative - and positive - sequence based on space vector

    本文提出了一種基於空量概念的基波正序、負序分量實提取新方法。
  11. The design of control and communication software : the software realized the communication of the five bouys with the control vessel and the acoustic emission vessel ; it controls the data acquisition system, it restricts the five bouys in the remote instructions from the control vessel and the acoustic emission vessel, and it also transmits the position and time information from dgps, the bearing information of the underwater acoustic construction from a electronic compass of type of tcm2 when in collection period of time

    控制和通信軟體設計:各浮標工作在指揮船和發射船遙控指令內容的約束下,控制和通信軟體實現了浮標與指揮船以及發射船的通信,控制數據採集系統工作,並在採集段完成gps位置、量水聽器方位信息的傳輸。
  12. In the control software, the object - oriented method is used for doing system analysis and study. furthermore, the message - driven mechanism is used in the control software research and design. the instantaneous zero vector inserting space vector pwm theory is adopted to control the permanent magnet synchronous machine as the driver motor in the control software

    軟體採用面向對象的程序設計方法對系統進行分析與研究,將消息驅動機制應用於控制軟體的設計和開發之中,在控制軟體中採用瞬量插入磁鏈軌跡法(電壓空量法)來控制永磁同步電機。
  13. Sets up three - dimensional movement modal of towed - cable, the vector dynamic equilibrium equation is expanded under local coordinate, and numerically discreted by central difference on time and space through transforming eular angle

    摘要建立拖纜的三維運動模型,通過歐拉角的變換把拖曳線列陣微元段量動力平衡方程在局部坐標系下展開,在和空上作中心差分數值離散。
  14. In the helicopter example, the eight flight times become the raw data vector

    在紙飛機的實例中, 8次飛行的成為原數據量。
  15. Usually, single vector sensor will obtain infinite gain if noise energy flow can be counteracted in whole space

    在理想情況下,若噪聲場為各向同性噪聲場,則通過聲能流長積分,單個量水聽器便可獲得無限大的增益。
  16. The vibration shapes - separation - spectra - method and time - history method are used to analyze the dynamic response of the cable - bar structure under common earthquake. and the effects of the rise - to - span ratio and the mass distribution are studied

    本文分別採用反應譜法和歷程法對環狀索桿結構的地震響應作了較詳細的分析,研究了跨比、質量分佈對環狀索桿結構地震響應的影響。
  17. Then, in order to reduce the coding time of each image vector, a fast algorithm based on mean - order - search is proposed. the simulation results of this algorithm show that its coding speed is twenty times faster than that of full search algorithm ( fs ), but its reconstructed image is badly ruined

    其次,為減少每個量的編碼,提出一種基於均值排序碼書的快速搜索演算法,測試結果顯示,該演算法編碼速度是窮盡搜索演算法的二十多倍,但是恢復圖像的質量大大地降低了。
  18. 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、瞬雙電壓法、空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量法的變調制比改進控制策略,提高了變換器的抗干擾性能;對空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。
  19. According to the data of the covariance - stationary stochastic time series, we can get the state space modeling algorithm quickly and stably by singular value decompositi on and orthogonal projection. this algorithm will be faster and more stable

    在已知平穩隨機序列樣本數據的情況下,論述了如何採用正交投影演算法和正交奇異值演算法建立隨機序列的狀態空模型和狀態量估計,這種數學建模方法對于船舶機艙中的系統數學建模有很大的幫助
  20. To reduce the runtime of the software, fast algorithms are adopted in the motion estimation and dct modules. moreover, this paper introduces early detection of zero motion vector and all zero coefficients to optimize the coding process

    為了提高軟體運行速度,對運算較長的運動估計和dct模塊採用快速演算法,並對編碼過程進行優化,採用了零運動量和零系數提前判決的方法,節省了很大一部分塊匹配搜索和dct運算
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