逆流迴流 的英文怎麼說

中文拼音 [nìliúhuíliú]
逆流迴流 英文
backflow
  • 逆 : Ⅰ形容詞1 （方向相反） contrary; counter 2 [數學] inverse; converse Ⅱ動詞1 （抵觸; 不順從） go aga...
  • 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...
  • 逆流 : anarrhea; backset; backwash; contra flow; counter flow; eddy; receding; counter current; reverse ...
  1. The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced

    論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況，在回顧電梯液壓控制系統節能技術的基礎上，介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理，分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式；詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計，重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容；最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。
  2. Meanwhile, fully - controlled igbt enables reversible flow of field current and reduce in the size of filter elements of main loop, so that the complete of device becomes smaller and lighter

    而全控式的igbt不僅可實現勵磁電流的可逆運行，而且由於提高斬波頻率，使主迴路濾波器件的體積大大減少，從而使整個裝置體積減小、重量減輕。
  3. The blast furnace is a heat exchanger and also an oxygen exchanger of the gas and row, there are many physical and chemical changes in it. it is not very reasonable to develop a model only consider the statistics relations

    但高爐是從風口迴旋區到料線的氣固逆流熱交換器；也是從軟熔帶到料線的逆流氧化交換器，其內進行著非常復雜的物理和化學反應。
  4. Firstly we investigated the flow field and temperature field of diffusion fuel. when the direction of centrifugal force as same as the velocity of flow, there is a circumfluence of anti - clockwise

    首先研究了擴散燃燒時的流場和溫度場。當離心力的方向與流速方向相同時，流場有一個逆時針方向的迴流區。
  5. We investigated the transformation of the flow field with the increase of centrifugal force. when the acceleration became bigger, the flow field has a main circumfluence of anti - clockwise and a circumfluence of clockwise on the downriver

    研究了流場隨著加速度增加的變化情況，隨著加速度的增大，當離心力與流速方向相同時，流場有一逆時針方向的主迴流區，在流場下游有一順時針方向的迴流區。
  6. The series h - bridge multilevel converter ' s power circuit is composed of uncontrolled rectifier with filtering capacitor and single phase h - bridge voltage - type inverter

    串聯h橋多電平變頻器的主迴路從結構上可分為三相電容濾波不可控整流電路和單相電壓型全橋逆變電路。
  7. The research results show that the counter - flow condensers have a better performance than that of other arrangements in single - circuit condensers, and that branch flow should be adopted in multi - rows condensers to decrease the pressure drop and increase the heat transfer capacity, and that the influence of gravity force can not be ignored, and that there must be an optimum refrigerant mass flow which can make the condenser perform best when the air velocity is constant while there must be an optimum air flow which can make the condenser perform best when the refrigerant mass flow is constant

    研究結果表明，單迴路冷凝器中，逆流布置換熱效果最好，叉流其次，順流最差；多排管冷凝器應盡可能採用分流方式，以減小壓降，增強換熱；布置冷凝器流程時，重力的影響不可忽略；當風量不變時，必然存在一最佳製冷劑流量使冷凝器性能達到最佳；當製冷劑流量保持不變時，也相應存在一個最佳風量使冷凝器性能最佳。
  8. Non - return ( stop - check ) valves provide the same function as a globe valve with the addition of providing piston - lift - check valve protection in the event of backflow

    逆止閥（截止止回閥）具有與截止閥相同的功能，還有活塞提升式止回閥的功能，防止出現意外的迴流。
  9. A non - linear feed - forward loop is used to realize the coordinated control between the two controlled variables at the two control ends at first. secondly, a constant ac voltage control is implemented for a short period after the ac fault removal. finally, a staggered recovery strategy for different hvdc subsystems is also adopted, with the restart time interval of them optimized using the steepest descent gradient search method

    該協調恢復策略的三個特點是：在常規的控制器結構中加入一個基於準穩態工作點的非線性前饋迴路；在交流故障被切除后的一個短暫時間內，逆變側採用定交流電壓控制：對不同的直流輸電子系統採取一種漸進的恢復策略。
  10. In addition, by using igbt in main loop of the system, control and operation of power elements is easy and reliable, and reversible flow of field current can be realized

    而採用igbt構成系統的主迴路，功率器件控制容易，工作可靠，可以實現勵磁電流的可逆運行。
  11. The mixed control chip sg3525a combined with hardware pi controller generates the high - frequency pwm pulse for the first inverter. the digital control block tms320lf2407a mainly provides current preset for constant - current source through the outer filter, pwm pulse for the second inverter and drive signal for the high - frequency pulse power supply

    其中變極性電源的一次逆變pwm信號由pwm發生晶元sg3525a ，配以外部硬體電路pi調節器產生;一次逆變閉環控制迴路的電流給定（配以外部濾波） 、二次逆變pwm驅動以及高頻脈沖電源的控制則由tms320lf2407a數字控制器實現。
  12. Deepening of reforming has touched people ' s deep problems in thought, like belief problems ; the economic globalization, as a historical trend, not only is affecting our politics, economy, culture and social life, but also exercises unavoidable influence in people ' s ideal and belief

    改革開放觸動了中國人深層次思想問題，如信仰問題；經濟全球化作為一種不可逆轉的歷史潮流在給我國政治、經濟、文化和社會生活帶來深刻影響的同時，也對人們的理想信念產生了難以迴避的影響和沖擊。
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