脈動數 的英文怎麼說

中文拼音 [màidòngshǔ]
脈動數 英文
pulse number
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 脈動 : [物理學] [天文學] pulsation; pulsing; pulse; ripple; impulsive motion; pulsating; panting; loping...
  1. If the coefficient of engagement overlap decreases, the flow aggrandize, trapping volume and the flow pulsating ratio decreases

    隨著齒輪嚙合重合系數的減小，齒輪泵的流量增大，困油容積和流量脈動率減小。
  2. Aiming at permanent brushless dc motor in mini - bev ( battery electric vehicle ) with torque ripple and violent noise during low speed running, the fuzzy control method is combined with slide mode control method to suppress the influence due to un - modeling parameters, and to ensure the robustness in the process of reaching slide mode plane

    摘要針對微型電動車用永磁無別電動機轉矩脈動大、低速運行時噪聲明顯等主要問題，採用模糊控制和滑模控制相結合的方法，克服了未建模參數的影響，保證了滑模到達階段的魯棒性，同時抑制了轉矩脈動。
  3. One cardiac cycle is divided into 50 parts in the transient analysis to accurately simulate the continuous pulsatile blood flow in the coronary artery, the hemodynamic parameters of the atherosclerotic and the controlled models at each of the 50 moments were computed in accordance with the physiological condition

    這些計算包括：脈動流情況下的非狹窄和狹窄不對稱性對狹窄流場的影響，分岔角度變化時動脈狹窄和非狹窄的各種血流動力學參數的計算模擬。
  4. Numerical research on fins to alleviate draft tube surging

    設置消減壓力脈動穩流片后尾水管數值解析
  5. The coefficients of skewness ( cs ) and kurtosis ( ce ) have the feature of cs < 0, ce

    縱向脈動速度概率密度分佈的偏態系數0 0 ，峰態系數ce 。
  6. Research on wind is the precondition of wind response, then the section plane of static wind, intensity of onflow, psd function and correlativity of dynamic wind are involved in

    對風的研究是進行風振響應研究的前提，風的基本特徵包括平均風速剖面、湍流強度、脈動風功率譜密度函數、脈動風的空間相關性以及極端風速的概率統計特性。
  7. Pulsant test and vibration models dvaluation are discussed in dynamic detection. pulsant test mainly expounds pulsant experiment, transitting test, bounce test, braking examination. lt is judged by the cell damage index whether carving up cell comes to harm

    其中脈動測試主要闡述了脈動試驗、跑車試驗、跳車試驗、剎車試驗。振型評估是通過劃分單元的單元損傷指數來判斷所劃分單元是否受損。
  8. Numerical simulation of pulsatile blood flow in coronary artery with symmetric 2 - way bypass graft

    冠狀動脈對稱雙路移植管中脈動血流的數值模擬
  9. Their shells, which apart from hydrogen, helium, and carbon also contain portions of the heavy elements formed in the stellar core, are inherently unstable, and their pulsing creates a withering stellar wind a billion times stronger than the solar wind we know today

    它的殼層除了氫層、氦曾和碳層外還有包含一部分產生自恆星核心的重元素，天生的不穩定，它們的脈動產生了一種毀滅性的星風，比我們現在知道的太陽風要強數百萬倍。
  10. Furthermore, this dissertation also gives a comprehensive analysis and comparison to the torque ripple factor, torque - current ratio and other aspects for pseudo - sinusoidal emf bldcm drived by 120 conduction mode, 180 conduction mode and self - synchronous svpwm mode respectively. the simulation and the experimental results indicate that self - synchronous svpwm method is more effective for minimizing the torque ripple without any expense of the torque - current ratio when the crest width of the back - emf waveform is less than 107 electrical angles

    對準正弦波反電動勢無刷直流電動機在120導通方式、 180導通方式和自同步svpwm三種控制方式下的轉矩脈動系數、轉矩電流比等方面進行了全面的分析與比較，模擬研究和實驗結果表明，當反電動勢的平頂寬度小於107電角時，採用自同步svpwm控制方法可以在不損失轉矩電流比的基礎上，更有效地抑制電磁轉矩脈動。
  11. For the bldcm which has a general crest width of the back - emf waveform, two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models. in addition, a comparison is carried out between these two conditions, which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value

    闡述了抑制齒槽轉矩措施對反電動勢波形的影響，利用無刷直流電機的數學模型推導並比較了任意平頂寬度梯形波反電動勢在正弦波和矩形波兩種電流驅動下的電磁轉矩脈動情況，得出在梯形波平頂寬度減小到一定數值后採用正弦電流驅動更有利於減小電磁轉矩脈動。
  12. In this work, a new dual triangulate bluff body vortex flowmeter was developed, the flux lower limit value of which lower by 50 % that of the old single bluff body vortex flowmeter. the linear correlation of the correlation between the velocity pressures of fluid disturbs wave and that of vortex precession in vortex precession flowmeter was brought to light, and a spectrum phase discrimination method based on fft to remove the effect of fluid pulsating interference on vortex precession flowmeter was advanced

    研製出比傳統單鈍體渦街流量計流量下限降低約50的新型雙鈍體渦街流量計；揭示出脈動流中旋進旋渦流量計流體振動特性，並在此基礎上提出基於fft相位判別的數字信號處理方法來消除流場脈動對旋進旋渦流量計的干擾的方法。
  13. 3. a three - dimensional - acoustic doppler velocimeter has been used to measure the velocity and turbulence in a compound channel with vegetated and unvegetated flood - plains. particulary in the interface region between main channel and floodplain. the distribution in three coordinate directions of velocity and turbulence intensities and the renolds stresses are presented. the momentum transfer at the main channel flood - plain interface can be described as an apparent shear stress which can be quantified as a function of the local turbulence at the interface

    採用adv對灘地種樹前後灘槽交界區域的流速場進行了量測。分析了灘槽交界區域的垂線流速、紊動強度和雷諾應力的變化。將灘槽交界的動量傳遞描述為一表觀應力，這個表觀應力可以看作是交界面處的脈動函數並將其定量化。
  14. An intensity modulated fiber optic micro - accelerometer with a digitally feedback circuit is designed. this sensor employs a graded index lens with a reflective coating on one end and measures the relative displacement between the lens and a pair of optical fibers

    在本系統中設計了脈沖數字式再平衡迴路，使得該微型光纖加速度傳感器和一般的光纖傳感器相比，又具有動、靜態性能較好，精度、穩定性較高等優點。
  15. The following is the detail design of the pump, and a optimum mathematical model are presented to mostly reduce the helical gear pump flow pulse

    在此基礎上進行了斜齒齒輪泵的結構設計，通過建立斜齒齒輪泵齒輪的優化數學模型，優化計算出使輸出流量脈動最小的斜齒輪參數，製造出斜齒齒輪泵樣機。
  16. The researchful results indicate that the flux pulse ration of ordinary helical gear pump without clearance is less than that of the gear pump with clearence under the condition that the main parameters are same, and the flux pulse ration of ordinary helical gear pump is less than that of whole profile meshing helical gear pump

    研究結果表明：在主要參數相同的情況下，普通斜齒齒輪泵無側隙時流量脈動率小於有側隙時的流量脈動率；全齒廓嚙合斜齒輪泵比普通斜齒輪泵的流量脈動略小。
  17. At first, on the base of the analysis of the mechanism of the helical gear pump, the paper try to find the relationship of the helical gear pump flow pulse with its corresponding parameters, give the solution of the problems brought by the replace of spur gear to lay the firm basis for the structural design of helical gear pump

    本論文在對齒輪泵工作原理和流量脈動機理分析的基礎上，首先探討了斜齒齒輪泵的輸出流量脈動與斜齒輪各結構參數之間的關系，以及由於斜齒輪替代直齒輪帶來的相關問題並提出解決辦法，為斜齒齒輪泵的結構設計奠定基礎。
  18. To put into operation a large amount of non - linear load, make in harmony wave of rural power grids serious becoming in pollution, pass to rural local electric wire netting main in harmony analysis of wave source, put forward in order to restrain from insert rural power grids in harmony wave source voltage total in harmony wave distortion rate and the containing rate change last device number pulsating for increase of goal, increase the pulse of the current change device and install light specified value electricity active wave filter mix with passive wave filter near the harmonics source to control the wave in harmony

    摘要大量非線性負荷的投運，使農村電網的諧波污染日趨嚴重，通過對農村地方電網主要諧波源的分析，最終提出了以限制接入農村電網的諧波源的電壓總諧波畸變率和各次諧波電壓含有率為目標的增加換流裝置脈動數，以及在諧波源附近裝設小額定值的電力有源濾波器配以無源濾波器的混合型電力濾波方式，以進行諧波治理。
  19. The method of coherence analysing by use of ground pulsation and event data by two seismometers is presented to develop the calculation model and operation method for seismeter ' s orientation

    闡述了用待安裝地震計和參考地震計獲取的地脈動數據及事件數據進行相干性分析，精確確定待安裝地震計安裝方位的理論計算模型和實際操作方法。
  20. In this paper, according to the fluid dynamic theory, mathematical model of the pressure transients accompanying the growing and collapsing of gas bubbles and cavitation in low pressure hydraulic pipelines is given, based on the continuity equation and motion equation. the mathematical models of friction item, the growing and collapsing of gas bubbles and cavitation are also introduced

    本文通過流體力學分析方法，在連續性方程和運動方程基礎上，建立了低壓液壓管路中伴隨氣泡和氣穴產生的瞬態壓力脈動數學模型，給出了動態摩擦力數學模型及氣泡和氣穴產生及破滅數學模型。
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