無脈動流 的英文怎麼說

中文拼音 [wúmàidòngliú]
無脈動流 英文
pulse-free flow
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 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
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 脈動 : [物理學] [天文學] pulsation; pulsing; pulse; ripple; impulsive motion; pulsating; panting; loping...
  1. The experiment results indicate that this method is more effective in the brushless direct current motor ' s low speed torque ripple attenuation, and its more effective in improving system dynamic performance

    運行結果表明，此方案能有效地抑制無刷直流電動機低速時的轉矩脈動，更好地改善系統的動態性能。
  2. Water feeding framework takes electromagnetism water valve as administration component and is added relief valve for stabilizing hydraulic pressure ; the system has large, middle and small water valve that changes unlock combination of electromagnetically operated valve, which can get seven different water flux ; if it is necessary, it should adopt microseism water feeding that can make water feeding get stepless timing

    3加水機構加水機構採用電磁水閥作為執行元件，加入調壓閥穩定水壓，系統共設大中小三路加水閥，變化電磁閥的開啟組合，可以得出7種不同的加水流量，必要時採用脈動加水法，可使加水達到無級調速。
  3. Objective : to investigate the effect of pumpless portosystemic bypass in clinical piggyback liver transplantation. methods : after catheterized inferior mesenteric vein, the silastic catheter ( filled with heparin saline ) was connected with the catheterized tube of internal jugular vein or subclavian vein in four piggyback liver transplantation patients. the channel was opened after the portal vein was occluded. the portal vein blood poured into the superior vena cava through the pumpless channel. the changes of mesenteric congestion, portal vein pressure, blood pressure and pulse were observed. results : during the occlusion of portal vein, the portal vein pressure was increased greatly, the intestine was congested and swelled obviously and the blood pressure and pulse fluctuated gently. after the pumpless bypass opened, intestinal congestion and swell were abated markedly, the portal pressure, blood pressure and pulse gradually returned to normal range. conclusions : pumpless portosystemic bypass shows a great effect on clinical piggyback liver transplantation. it is a feasible and economical method

    目的探討背駝式原位肝移植術中採用體外門-體靜脈無泵轉流的臨床效果.方法4例行背駝式原位肝移植患者，腸系膜下靜脈屬支插管經體外硅膠管（充滿肝素鹽水）與頸內靜脈或鎖骨下靜脈插管相接，在阻斷門靜脈后開通腸系膜下靜脈插管，門靜脈血從體外無泵轉流管流入上腔靜脈，觀察轉流前後腸道瘀血、門靜脈壓、血壓、脈搏等變化情況.結果門靜脈阻斷后腸道明顯瘀血、腫脹，門靜脈壓力明顯升高，血壓、脈搏有不同程度的波動，無泵門靜脈轉流開放后，腸道瘀血、腫脹明顯好轉，門靜脈壓力逐漸恢復正常水平，血壓、脈搏恢復正常.結論背駝式原位肝移植術中體外門-體靜脈無泵流具有方便、經濟、實用等優點，具有良好的臨床效果
  4. Through the experiment, the following results were given out, whether the system was rolling or not, there were always density oscillation gradients when the two - phase flow instabilities occurred, and the stability of the system was always strengthened with the increasing of the inlet mass flow or the increasing of the inlet subcooling of the test tube

    實驗結果表明，無論是搖擺還是不搖擺，系統發生的不穩定類型中都有密度波型脈動成分，系統的穩定性總是隨流量的增加而增強，隨入口過冷度的增加而增強。
  5. Torque ripple reduction in brushless dc motor drives using a buck converter

    變換器的無刷直流電機轉矩脈動抑制方法
  6. 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 （電壓空間矢量法）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，包括起動時電壓空間矢量的初始定位，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。
  7. The simulation results prove that this control technique can effectively minimize the torque ripple for the bldcm drives whose back - emf waveform crest width is less than 120

    模擬結果表明這種控制策略能有效地抑制反電動勢平頂寬度小於120電角的無刷直流電動機的換相轉矩脈動。
  8. 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。
  9. 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。
  10. 3. with fourier decomposition, the main component of pulsating torque, torque ripple is studied. it can be determined that torque ripple is caused by harmonic order 6n under the usual common conditions

    3 、對造成轉矩脈動的主要成分轉矩紋波進行諧波分析，得出在一般假設情況下，無刷直流電動機系統的轉矩紋波由電磁轉矩的6n次諧波造成的結論。
  11. 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。
  12. Analysis on commutation torque ripples of a pmbdc motor based on c - dump converter

    變換器供電的無刷直流電機換相轉矩脈動的分析
  13. An analysis and a compensation method for commutation torque ripple in trapezoidal bldc motor

    無刷直流電機換相轉矩脈動的分析及其補償方法
  14. Aim to evaluate the feasibility of one simple method to establish model of venous thrombosis for studying the therapeutic effect of intracavitary ultrasonic therapy on venous thrombus of animal models. methods the lower limbs of 20 dogs were divided randomly into the experimental group and the control group. the femoral veins of the experimental group were ligated at the close and distant end respectively to slower the flow of blood. the veins in control group were operated but not ligated. then, the changes of the dogs ' lower limbs were observed and the femoral veins were excised for pathological examinations and examined to investigate the condition of thrombis in the veins at the 1st, 4th and 7th day respectively after operation. results all the dog ' s lower limbs in the experimental group swelled and were lame slightly, the thrombus came forth in all the 6 veins by pathologic study at the 1st day after operation. and it was opposite in the control group. in addition, the swelling of all the dogs ' lower limbs was aggravated and all the 14 femoral veins were filled with compact mixed thrombus at the 4th and 7th day after operation. and it was also opposite in the control group. conclusion the method to establish models of venous thrombosis by the simple ligation of close and distant end of the femoral veins can make thrombosis more approaching clinical course of thrombosis and is satisfying

    目的為研究腔內超聲溶栓對動物模型靜脈血栓的療效而評價一種制備靜脈血栓模型方法的可行性.方法犬20隻採用自身對照研究，犬一側後肢股靜脈為實驗側，另一側為對照側.實驗側行股靜脈近、遠端分別結扎，人為造成犬後肢股靜脈血流緩慢;對照側行手術，但不結扎血管.然後于術后第1 ， 4 ， 7天分別觀察犬後肢變化，切取血管標本做病理觀察，了解血栓形成情況.結果術后第1天實驗側全部出現後肢腫脹，輕微跛行，病理切片顯示: 6條靜脈全部都形成血栓;對照側沒有出現後肢腫脹及跛行， 6條靜脈都無血栓形成.第4 ， 7天實驗側後肢腫脹加重，跛行，病理切片顯示:實驗側14條靜脈血栓充滿管腔，為混和血栓;對照側沒有出現後肢腫脹及跛行， 14條靜脈無血栓形成.結論採用靜脈單純結扎法制備犬靜脈血栓模型，血栓形成更接近臨床血栓形成過程
  15. Modified formula for sensorless dc motor speed estimation was proposed through the test for relationship between the current ripple frequency and the rotation speed in a 4 - pole dc motor

    摘要根據4極直流電動機的轉速與脈動電流頻率關系的實驗結果，對現有的無傳感器直流電動機測速公式提出了修正意見。
  16. This article analyses the operation principle of the semiconductor laser power in detail, and demonstrates the feasible scheme of the main part of the power according to the special request under the quasi - successive working way, designs the corresponding hardware circuits and software procedures which implement the accurate automatic control of timing, steady voltage and invariable current power supply without pulse voltage and surge current for digital display semiconductor laser power

    本文深入分析了半導體激光電源的工作原理，根據準連續工作方式下的特殊要求，論證了電源的主要環節的可行性方案，設計了相應的硬體電路與軟體程序， （實現了定時的精密自動化控制、數字式顯示機半導體激光電源的無脈沖電壓、無浪涌電流的穩壓恆流供電。
  17. Firstly, the mechanism of self - excited oscillation was introduced. when the water jets from the inlet nozzle flows into the chamber, the momentum exchange between the jet and the liquid in the chamber occurs, thus to form an unstable shearing layer with certain thickness

    這是一種嶄新的強化換熱技術，流體脈動能夠造成換熱器全程的換熱強化，而且自激振蕩脈沖射流強化換熱技術本身是一種無功強化的方法，無需輸入外部能量來產生擾動。
  18. In addition, the effects on the torque ripple caused by the pwm modes, overlapping commutation and so on are analyzed, and the conclusion is reached : the commutation torque ripple varies with the rotor speed

    並得出結論：永磁無刷直流電機換相轉矩脈動的大小在電機確定的條件下，主要受電機轉速的影響。
  19. Because of the clamping capacitor and the interleaved structure, it has some good features compared with other flyback converters, such as : the topology is simple and can be realized easily ; the voltage spike of the power switch is availably restrained and without leakage - inductance energy loss ; the ripple of the input and output current is reduced, correspondingly, the volume and weight of the output and input filter is also significantly reduced

    由於箝位電容的加入，相對于其他類型的反激式變換器電路，該拓撲具有一些獨特的優點:電路結構簡單且易於實現;無需另加輔助開關管，實現了開關管的有源箝位，抑制了開關管的電壓尖峰;提高了輸入、輸出電流的脈動頻率，減小了輸入及輸出濾波器體積。
  20. In order to make a clear technical analysis on it, author sets out research work with it ’ s principal and derives basic formula which makes it clear why crehsm can performance ultra - low speed without velocity pause

    從連續回轉伺服馬達的結構模型入手，分析了新型馬達可以實現轉速、流量和理論輸出扭矩的無脈動。針對馬達超低速的特性，作者提出了改善其性能的措施。
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