首選電路 的英文怎麼說

中文拼音 [shǒuxuǎndiànlù]
首選電路 英文
first choice circuit
  • 首 : Ⅰ名詞1 （頭） head 2 （首領） leader; head; chief 3 （表示方位） aspect 4 （姓氏） a surname Ⅱ動...
  • 選 : Ⅰ動詞1. （挑選） select; choose; pick 2. （選舉） elect Ⅱ名詞（挑選出來編在一起的作品） selections; anthology
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 路 : 1 （道路） road; way; path 2 （路程） journey; distance 3 （途徑; 門路） way; means 4 （條理） se...
  • 首選 : first choice
  • 電路 : [訊] circuit （ckt）; electric circuit; electrocircuit電路板 circuit board; 電路保持 guard of a c...
  1. It shows the functional relationship between the instantaneous voltage and time. the intuitionism and particularity of the oscilloscope are outstanding compared with other electronic instruments. therefore, technicians in test and measure prefer to use it

    它以圖示的方式把電路中的瞬間電壓同時間的函數關系描繪出來，其測試的直觀性和細致程度是其它測量設備不可比擬的，所以是工程技術人員進行測試和故障檢修時的首選工具。
  2. The wine shop owns high class guest room more than 260s, the administration business, luxury, standard, commonness, economic etc. room is well - found, suite, single, a building is complete, satisfying the different business need. in addition to the star class standard function installs, the breadth takes the internet access, independent business center in several - storied building in administration etc. provides for the guest the information turns the business convenient. can accept 50 - 500 people big, inside, small scaled board room, every kind of profession meeting facilities and multi - function meeting facilities and professions turn the committee affairs serves, a dragon business secretary the service arrives efficiently a head for, is business guest chooses the wine shop. a the stands type business service is the service guidebook of the recent star class in center in exhibition in international meeting in conduct and actions in wine shop in shield in wakingtown hotel

    酒店擁有行政豪華標準等高級客戶260餘間，客房寬敞明亮溫馨親切，單雙三人房及套房等多種類別任君選擇。除星級標準功能配置外，寬帶電腦網際網路插口等與信息化同步的全方位配置，針對性滿足信息化商務需求，個性化定製服務更使賓客感受到超星級貼心服務。可容納50 - 500人的大中小型會議室，多功能會議設施備，專業化會務服務全程跟進，是商務團體會議展覽培訓的首選酒店。
  3. Firstly. operation principle of induction heating is introduced and the actuality of the power supply for induction heating is summarized. then, the scheme of structure of the power supply is established : uncontrolled rectifier and buck chopper constitute dc circuit. in this part, operation principle of a kind of soft switching buck chopper is presented mainly and the conclusion that the power semiconductor devices operate in soft switching is also illustrated by analysing the operation principle of all stages ; series resonant inverter is selected as inverter circuit via comparing the advantage and shortcoming of parallel resonant and series resonant. moreover. the work principle of series resonant inverter is analysed and the calculating method of the best dead time is put forward as well

    文中首先介紹了感應加熱電源的工作原理並綜述了國內外的研究現狀。接下來分析並制定了電源主電路的構成方案：在對比幾種功率調節方式的基礎上選擇了不控整流加斬波調壓作為直流部分。在這部分里，重點研究了一種軟開關buck變換器，通過分析各階段的工作原理說明了開關器件如何工作在軟開關狀態；對于逆變器部分，在比較了串、並聯逆變器優缺點的基礎上選擇了串聯諧振逆變器，並詳細分析了串聯逆變器的工作原理，提出了最佳死區的計算方法。
  4. According to the equalization techniques introduced first, the thesis chooses the bidirectional buck - boost converter as the main equalization circuit, with the introduction of equalization strategy followed

    首先，通過對均衡技術的研究，選用了基於雙向升降壓變換器作為均衡主電路，並對均衡控制策略進行了探討。
  5. This paper first begin with the connotation of virtual instrument technology, study and discuss the criterion and the working theory of usb deeply. on the principle of usb1. 1criterion, using usb interface chip usbn9604 and low consumption mirochip c8051f231, we designed the available interface of usb bus and its controlling software, turn the communicating function based usb bus between computer and testing device. second based on the developed interface of usb bus, using microchip pic16c62 and a mount of relays, we designed the multiswitching scanner and its controlling software to complete the funtion of accesses swithing in testing system. third calling the api function inside the windows using vb programming language, communicat with the impelling program of selected hid, achieve the function of testing instrument with usb interface, complete the development of upside software faced testing. at last, based on the deep studying of pcb testing method, used the developed multiswithing scanner and software faced testing, combinated with necessary testing instrument, we constructed the pcb testing system and analized the testing result simply

    論文首先從虛擬儀器的技術內涵出發，深入研究和討論了通用串列總線usb規范及工作原理，並依據usb1 . 1規范，採用usb介面晶元usbn9604和低功耗微處理器c8051f231設計開發了通用的usb總線介面及其控制固件，實現了通用計算機與測試設備之間基於usb總線的通信功能；其次，在所開發的usb總線介面的基礎上，使用微處理器pic16c62和多路繼電器開關，設計開發出實現測試系統中測試通道切換功能的多路通道掃描器及其控制固件；再次，採用vb語言編程，調用windows內部api函數，與選定hid類驅動程序進行通信，實現usb總線介面測試儀器功能，完成面向測試的上層軟體開發；最後，在深入研究印刷電路板測試方法的基礎上，利用已開發的多路通道掃描器和面向測試軟體，結合必要測試儀器組建印刷電路板測試系統，並對測試結果進行了簡要的誤差分析。
  6. Secondly, the composition and function of expander board is introduced, the paper describes a detail developing process of selecting component, design interface circuit, protract pcb with protel and design pci interface logic and user ' s logic. with ahdl and max + plus. in addition this paper discusses how to debug pci board, and give the simulation waveform and the result of debug. on the base of all functions is ture, this paper introduce the config registers and memory of bu - 61580, realize the interrupt function and communication based on mil - std - 1553b

    首先分析了擴展板的組成、功能，對pci介面邏輯和擴展板的內部邏輯進行詳細設計，並根據其資源要求進行器件選擇，然後使用protel工具進行電路板的製作。另外，本文還介紹了擴展板的調試方法，給出了邏輯模擬波形和調試結果。在此基礎上，本文闡述了協議晶元的配置方法，實現了1553b通訊擴展板間的通訊及中斷功能，達到了開發技術指標。
  7. First - choice circuit group

    首選電路群
  8. First, based on the analysis of the design method of two - valued shift counter, we use the multivaled circuit ' s property of high information density to put forward the design method of three - valued shift counter. by using this method module - n three - valued shift counter can be designed. and by selecting the best design method, the simplest circuit of control logic can be made

    首先，在分析二值的移位計數器的設計方法的基礎上，利用多值電路的高信息密度，提出了三值移位計數器的設計，運用該方法可以設計任意狀態的三值移位計數器，並且通過選擇最佳設計方案使控制邏輯電路最簡。
  9. We take advantage of the method of trying and supposing to finish the experiment. for example, we firstly compute the number of the led regarding perfect situation, then finish the experiment and rectify the numerical value. for another example, we firstly compute the resistance under the desiring situation, secondly choose appropriate resistances according to the debug result

    在試驗過程中，採用了假設法，在光源強度的選擇中，首先將led看作理想點光源，然後對其光路進行分析，計算出led需要的個數，最後在試驗中對結果進行修正;在確定光源驅動電路電阻時，也是考慮各種器件都工作在理想狀態下，然後計算出其值，最後在調試的過程中對其進行修改。
  10. Different power circuits and control strategy of the single phase inverter in parallel condition are first analyzed, and half - bridge inverter is selected as the power circuit and current hysteresis control is selected as the control strategy

    本文首先對單相逆變器的主電路結構和控制電路的結構在並聯條件下進行了比較分析，最後選用了半橋結構的主電路和內環為滯環控制的瞬時電壓電流雙閉環反饋控制方式。
  11. Then i finish the analysis from three aspects, instruction of circuit, stress of surrounding, and tolerance, thus providing basis of design. the following designs are in progress from four aspects, which are circuit design, thermal design, derating using and screening. at last, i make the update generator in batch process, and collect and analyze reliability dates again

    首先進行了與可靠性相關的數據收集與分析，對故障模式進行統計；然後從電路結構、環境應力及容差三個方面進行可靠性分析，從而為關鍵的可靠性設計提供了依據；接下來的可靠性設計，從電路設計、熱設計、降額使用、篩選四個方面逐一解決了可靠性分析階段發現的問題；最後，我將改良的發生器批量生產，並從中重新收集了可靠性數據進行計算，事實證明改良后高頻無極燈的平均壽命已達到6萬小時。
  12. In fact, among of our products, the pig - use drinker has won a state prize, and the piglet - use electric hot plate of double circuits has become the users first choice as a heating installation

    其中豬用飲水器是國家獲獎產品.雙線路仔豬電熱板已成為用戶選取加熱設備的首選產品。
  13. The paper first reviews the research background and actuality of the filter " s design in china and other country, introduces the meaning of the project and the work of the paper, narrates the theory of the switched - capacitor network and the basic switch building blocks, analyses the related factors of the design of sc filter. such as the selection of the architecture, the trade off of the opamp " s gain, bandwidth, phase margin, slew rate and setting time, the effect of the switch " s on resistor, how to reduce the charge injection and the clock feed - through, the power consumption and the selection of the sampling frequency and so on

    本文首先回顧了濾波器設計的國內外研究背景和現狀，介紹了本課題提出的意義以及本文的主要工作，論述了開關電容網路原理和基本開關模塊，分析了開關電容濾波器設計的相關因素：電路結構的選擇，對運算放大器設計中高增益、寬帶寬、相位裕度、轉換斜率和建立時間等的折中考慮，開關的打開電阻對電路的影響，開關電容電路中怎樣減少電荷注入和時鐘饋通，以及整個電路的功耗問題和采樣頻率的選擇等。
  14. Firstly, the driving characteristics of high frequency power mosfet and parameter computation of drive circuit are introduced briefly. then the useful and reliable drive circuit is designed

    首先簡要介紹了高頻功率mosfet的驅動特點以及驅動電路參數的計算，然後根據實際情況選擇並設計了實用可靠的驅動電路。
  15. The integral structure of system are analyzed, and a scheme based on dsps processing board + mcu control board are put forward firstly, following design difficulties and relevant measures. every modules of dsps board are described in details, including chips selection, implementation manners choice, interface and time sequence match and etc. compared otsu single threshold segmentation with multi - threshold segmentations, the latter are preferred to perform the object identification in hardware designed by author. combined to like background rejection, morphology expansion and etc. steps, the paper gets the length of queue ; finally, a - b united control and area united control based on can bus are designed

    首先分析了系統的總體結構，提出了一種基於dsps處理板+單片機控制板的信號機實現方案；在此基礎上，重點介紹了處理板模塊化的硬體電路設計，其中考慮了晶元的選型、實現方式的選擇、工作機制、時序匹配等問題；之後，分析了otsu單閾值目標識別和多閾值目標識別的效果，重點選擇後者在硬體電路板內對圖像進行了目標識別的演算法處理，結合背景的剔除、形態學膨脹等幾個減小誤差的措施，對車輛排隊長度進行了較為精確的提取；最後在控制板上完成了干線a - b信號聯動控制和基於can總線的區域聯網控制的通訊方案設計。
  16. The basic principle of natural gamma - ray log is stated, the developing background, developing ways and developing situation of natural gamma - ray tools are introduced. the researching task of the paper is presented through analyzing the using situation and questions exsisted in inner natural gamma - ray tools, the researching work is started from three aspects, they are logging tool development, reliability design and reliability assuring methods, and the data processing methods, in the course of logging tool development, instrument indexes are presented based on the compatible property of sookbps telemetry system and environmental property, the analog measuring chanel and the interface circuit which realizing the compatible performance are designed according to the instrument mdexes. the detecto * design. the plateau property testing of the detector and the analysis of it ' s affecting factors are stated, the measuring property of the tool is discused, a new type of single chip microcomputer is selected when designing the interface circuit, and the laboratory experiments has fulfiled conmunieating standard signals between the interface circuit, the universal interface unit of sookbps telemetry system and also 500kbps telemetry system

    本文首先概要介紹了石油測井的基本概念、方法、條件、最新進展、以及應採取的研發對策，論述了自然伽瑪測井的基本原理，介紹了自然伽瑪測井儀的發展背景、發展歷程和發展現狀，通過分析國內自然伽瑪測井儀的使用情況和存在的問題，提出了本文的研究任務。研製工作從測井儀研製、可靠性設計與可靠性保障技術、數據處理方法研究三個方面展開，在測井儀研製過程中，根據500kbps遙傳系統要求的配接性能和使用環境特徵，提出了主要儀器指標，並根據這些指標，設計了儀器模擬測量通道和實現這一配接性能的介面電路；論述了探測器的設計、坪特性影響因素分析及其測試，探討了儀器的測量性能；在設計介面電路時選用了新型單片機晶元，並與500kbps遙傳通用介面單元rtu 、 500kbpa遙傳系統實現了室內配接。
  17. In this paper, firstly we analyzed the basic phase shift mechanism and various basic phase shifter circuit forms, specially devoted to the circuit analysis and design aspects. it provides the theoretical basis for circuit topology selection, design and optimization of the phase shifter

    本論文首先就移相原理、各種類型移相器電路的工作方式、特點以及設計方法進行分析，為移相器電路拓撲選擇和設計優化提供理論依據。
  18. Then the solving procedures of these bies by the rwg functions based moment method are elaborated, and the method of modeling complex objects built of arbitrary line, surface and volume structures is developed. in order to solve realize antenna and circuit problems, methods of adding excitations and concentrated loadings with moment method are deceloped, and matrix pencil ( mp ) method is used to deembeded the s prameters of antennas and circuits from the computed current distribution. some numerical results of practical complex antenna and scattering problems are presented to illustrate the veracity and effectiveness of the method

    在第一部分中，首先從電磁場的基本理論出發，基於等效原理和邊界條件以統一的方法建立了用於分析金屬、介質及金屬與介質混合結構的邊界積分方程，並歸納和比較了各類積分的適用范圍和優缺點;在此基礎上，給出了使用基於rwg函數的矩量法求解各種邊界積分方程的一般過程;研究了具有任意線、面、體組成的復雜結構的電磁建模方法，並給出了各種多面連接情況下基函數和未知量的選取方法;研究了使用矩量法分析電路、天線問題時集總元件和激勵源的處理方法，並基於矩陣束方法（ matrixpencilmethod ）提取了電路和天線問題的s參數;最後通過分析一些工程中的復雜金屬天線問題和具有「金屬與介質混合結構」的散射和天線問題驗證了方法的準確性和高效性。
  19. Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent

    本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
  20. The thesis describes a prototype fractional frequency synthesizer which is supported by a project granted by the ministry of science and technology of pr china. firstly, based on the principle of pll, this paper briefly describes three basic pll components : phase detector ( pd ), low pass filter ( lpf ), voltage controlled oscillators ( vco ), analyzes the linearized pll and summaries the transfer functions of third - order pll with ideal intergrator filter respectively. based on a microwave vco, the single point frequency pll frequency ranging from 2. 2 to 2. 5ghz is developed

    首先，從鎖相環的基本理論、原理出發，分析了鎖相環中的三個基本部件：鑒相器、環路濾波器和壓控振蕩器，此後，針對線性化鎖相環進行了分析，研究了在使用比例積分濾波器時，三階鎖相環的環路參數計算；在電路實現時選用了lmx2353 ，在此基礎上，完成了2 . 2 ~ 2 . 5ghz范圍內的小數頻率合成器設計。
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