整流面 的英文怎麼說
中文拼音 [zhěngliúmiàn]
整流面
英文
fairing face-
For some sediments and flow the flat bed does not occur and the bed form goes directly from dunes to antidunes.
對某些泥沙和水流，平整床面並不發生，而床面形狀則直接從沙壟轉為逆行沙壟。With the stringent requirement of low output voltage and high output current, semiconductor diode is necessarily replaced by synchronous rectifier to minimum voltage drop. because the existed driving schemes can not drive srs properly, two novel driving schemes for synchronous rectifiers in magnetic amplifier post regulating circuit are proposed in this paper
已有的同步整流管驅動電路主要面對多路輸出的主輸出電路，而應用磁放大器調節的輔助輸出電路同步整流管的驅動，現有的方法存在磁放大器調節與同步整流管驅動的失配，降低了開關電源的效率。Based on the thorough investigation of the post - regulation and efficiency in multiple output switching - mode power supplies, an optimal combination topology for multiple output switching converter is presented in this thesis, which is consisted of forward converter with active clamp ( fac ), synchronous rectification ( sr ) techniques and magnetic amplifier technique ( magamp )
本文通過研究分析近年來多路輸出開關電源輔助輸出電壓調節和提高效率的方案，面對開關電源朝著輸出低電壓大電流方向發展的趨勢，提出多路輸出開關電源新的拓撲優化組合模式? ?有源鉗位正激變換器、同步整流技術、磁放大器。One kind of rectifier is made by heating ; a sheet of copper in air until a thin layer of copperoxide forms on one side
一種整流器是這樣造成的、把銅片在空氣中加熱，直到在一面形成一層薄薄氧化銅。Thirdly, the relative theories of the limiter and rectifier are studied. in order to make the passive responder work stably under the conditions of large dynamic range of the receiving power and the high efficiency requirement, a two - stage limiter circuit and a voltage - doubler rectifier circuit with several diodes parallel are developed
3 ，對應答器地面裝置中的能量轉換電路進行了研究，針對應答器地面裝置接收到的載波功率具有大動態范圍的特點以及系統能量轉換的高效率要求，設計了一種兩級級聯二極體限幅電路和多管並聯的倍壓整流電路。This system consists of a full bridge pwm ( pulse width modulation ) regenerative rectifier or so - called vsc ( voltage source converter ) that connected to pcc ( point of common connection ) at the power utility grid through a passive interface circuitry
這種系統包括一個pwm全橋可逆整流器或者所謂的電壓源變換器，通過無源電路介面與電網的pcc點（公共連接點）相連。The generator is verified to be of well performances by experiment. the third part concerns the control system of pm generator in vehicle application by commutating and inversion. considering the development of future power supply of auto electric system and the economizing on energy, the multi - voltage power supply system for future autos power supply system is introduced, and the design is given in detail
最後，結合現代電力電子技術，利用整流橋、逆變器、 mosfet等元器件設計並實現了車用永磁發電機恆壓輸出控制；從未來汽車電氣系統的發展方向和高效節能方面考慮，提出未來汽車的多電壓供電系統的典型配電模型，並對該模型進行具體設計，實現多電壓供電的功能，並給出了控制線路中各主要部分的波形。The materials and section - size calculation of earthing conductors in the rectified station
整流所接地導體的材料選擇及截面計算An auxiliary structure or the external surface of a vehicle, such as an aircraft, that serves to reduce drag
整流裝置運載工具（如飛機的）用以減少阻力的一種附件或外部表面In the thesis, the design method of the diagonal flow fan impeller has detailedly researched different from the previous means borrowing and extending design methods for axial flow or centrifugal type, a complete design method has presented on the basis of quasi - three dimensional design idea. the course is mainly composed of such steps as meridional surface design, inverse problem computation in meridional surface, blade shaping on stream surface, and verifying through three dimensional computation, until the design requirement is met at last
不同於以往的軸流式或離心式延長設計方法或經驗方法，本文按照準三元設計的思路給出了一套完整的設計方法，即子午面設計?子午面反問題計算?斜流流面上葉片造型?三維計算驗證優化，直至符合設計目標。The reason to creates this kind of destruction to be very many, the main of them is that the apron partially has not been able fully to display it to eliminate energy affect so causes the ditch bed to wash out, forms flushes the pit, leading to the apron, to guard against flushes the trough and both banks slope protection destruction, for a long time, disappear power design of plunge basin and layout have been focused on disappear power. but not to give the enough value on uses the sea to inundate the section to disappear power and adjust speed to reduced downriver washes out
水閘閘下沖刷破壞的部位絕大多數發生在消力池下的海漫和防沖槽處，造成這種破壞的原因很多，其中很大一部分是由於海漫部分未能充分發揮其消能作用而引起渠床沖刷，形成沖坑，導致海漫、防沖槽及兩岸護坡的破壞。一直以來，人們把消能的研究重點放在消力池的消能設計及平面布置上，而對海漫段消能及調整流速功能研究甚少，至於對海漫加糙水流運動建立數學模型，在國內外還很少見相關的論文資料。Supposed that the fluid in all the fields will accomplish a transport in down - flow distance a z, the flow in trickle - bed is a m step markov process, where m = z / z ( z - the height of trickle - bed ). according to the theory of random process, the statistic of the markov process will be calculated out from the original distribution and state - transport matrix
假定液體從床層上端面向下流過z距離后，處于各區的流體就實現了一步轉移，則可將床內液體的流動視為從一個初始分佈開始，經過m步（ m = z z ， z為床層高度）轉移的狀態離散、滴流床流率分佈的模擬與整流時間離散的markov過程。In industrial restructuring, we formulated and implemented development programs and industrial policies for energy, important raw material production, equipment manufacturing and other sectors, and adopted policy measures to encourage development of the wholesale and retail industry. we guided and supported major industries to ensure their sound development and closed down a number of production facilities that had backward equipment, wasted energy, created serious pollution and were unsafe
在產業結構調整方面，制定和實施了能源重要原材料和裝備製造等行業發展規劃和產業政策，提出了促進流通業發展的政策措施，引導和支持重點行業健康發展淘汰了一批高耗能高污染和不符合安全生產條件的落後生產能力。The second, third and fourth chapter, introduce three main enterprise valuation approaches and methods : dcf ( discounted cash flow ) method, market multiplier method and adjusting the book value of the financial statements. these chapters are also the predominant part of this thesis. the fifth chapter focuses on the comparison research on the different valuation methods, sets forth the advantages and disadvantages of each method, at the same time, introduces rim, eva and ddm valuation methods
本文共分五部分：第一部分介紹企業價值概念；第二、三、四部分分別介紹了現金流量折現法、市場比較評估法、調整賬面價值法三種企業價值評估方法，並對每種方法的關鍵理論問題做出了闡述；第五部分對這些評估方法進行了比較研究，分析了各方法的優點和不足，提出了各方法的適用范圍，並簡要介紹了rim 、 eva和ddm三種國外較新的價值評估方法。The objective of this dissertation is to develop the simulation and optimization software with good features of easy using and complete functions and to apply to commercial naphtha catalytic reforming processes
論文面向工業應用，其目標是開發出自主的、應用方便的、功能齊全的專用催化重整流程模擬優化軟體。Firstly, the basic theory of full - bridge phase - shift zvs pwm converters are expatiated and another three kinds of circuits of full - bridge phase - shift zvs pwm converters are discussed. there are four kinds of problems which are emphasized : how to expand the zvs range ; how to reduce the circulation in the primary side of the transformer in order to minimize the on state losses ; how to decrease the loss of effective duty circle and how to eliminate the parasitic oscillation of the output rectifiers
本文首先分析了基本的全橋移相zvsdc dc變換器的工作原理，為解決滯后橋臂不易實現零電壓開關（ zvs ）的情況，討論了另外三種全橋移相zvsdc dc變換器的電路拓撲，重點分析並解決了四個方面的問題：如何擴大zvs的負載范圍；減小變壓器原邊環流，降低變換器系統通態損耗；減少變壓器次邊有效占空比丟失；消除輸出整流二極體的寄生振蕩。In theory analysis, the voltage waveforms of the 12 - pulse waveform controlled rectifier circuit and three - phase thyristor converter under fault and normal condition are analyzed and researched in detail, all the faults states are summarized and classified according to the aberrant voltage waveforms
在理論分析方面，本文對三相橋式整流電路、 12脈波可控整流電路等大功率電力電子裝置整流電路在正常運行及故障狀態下的整流電壓波形進行了詳細分析和研究，按照電壓波形對故障狀態進行了總結和歸類。Application of active power filter in decreasing harmonics in phase - controlled power source
有源電力濾波器在抑制晶閘管相控整流電源諧波方面的應用Control system software is improved with three aspects such as the start of rectifier, confirmation of pi parameter and improvement of ac current, and the control strategy is consummated further. an integrated experiment system is setup
結合高品質整流電源與逆變環節的聯合控制特點，從整流電源的啟動、 pi參數的確定和電流波形的改善三個方面對控制系統軟體進行了改進，完善了整流電源的控制方法。The constitution, interface and control principle of main circuit, rectifier control module, inverter control module, generator ' s rotor speed and rotor position measuring module, information exchange module are discussed. specially, the methods of implementing signals level match in multi - voltage system, synchronizing with pc in parameters measurement and measuring rotor speed and rotor position with high precision are explained in detail
文中討論了主電路、整流器控制模塊、逆變器控制模塊、電機轉速和轉子位置測量模塊以及信息交換模塊的組成、介面方法和控制原理，詳細說明了系統中實現不同電壓等級間信號電平匹配的方法、系統與上位機進行同步參數測量的方法以及實現高精度電機轉速和轉子位置測量的方法。分享友人