管形開關 的英文怎麼說
中文拼音 [guǎnxíngkāiguān]
管形開關
英文
tubular switch-
Nowadays, there are a series of problems to solve in the management of student apartments. after comparing the three representative modes of investing and constructing college apartments worldwide, i. e. the modes of apartments managed by university, managed by investor and managed by both university and investor, the paper analyzes the different operation modes according to different construct forms and their advantages and disadvantages. using the operation modes of student apartments abroad for reference, the paper puts forward three new modes combining property management and ideological and political education in operating students apartments : community management, apanage management and open management, and lays emphasis on the key role of managing student apartments in the socialization reform
目前在我國學生公寓的運作上還存在著一系列需要研究解決的問題，本文總結國內高校學生公寓投資和建設的三種代表形式進行了分析比較，針對三種管理的不同形式，即由校方統一管理、由投資方管理以及由學校和社會共同管理，進一步分析其投資建設形式不同帶來的不同運作，通過對其利弊的分析以及對國外高校學生公寓運作模式的借鑒，本文提出了「社區化管理」 、 「屬地管理」 、 「開放式管理」 、 「物業管理與思政工作有機結合」四種學生公寓運作的新思路，著重強調了學生公寓的管理工作在整個公寓的社會化運作過程中的關鍵性作用。In the process of the construction of electric power industry informational, there are a great deal of historical data which cry for decision support system using technology of data mining ， and it would be used to resolve the pivotal 、 extrusive question. this paper bases on the need of electric power marketing decision support system, discuss a lot of kinds of arithmetic. and choose the fit arithmetic, make progress base on electric power marketing decision support system. design and realize some of the difficult data structure and arithmetic ， and encapsulate them into some api function, from a series of api function for the second exploitation
電力行業信息化建設積累了大量歷史數據，迫切需要利用數據挖掘技術研發分析決策支持系統，以解決供電企業運營管理中關鍵和突出的問題。本論文根據決策支持系統的需要，對各種演算法進行了一定程度的探討，選擇適當的演算法，進行適當的改進，設計並實現了其中幾個比較困難的數據結構和演算法，並用vc + +把它們封裝成若干個的api函數，形成一系列可供二次開發使用的api函數，並編譯成dll文件。In the digital inverter, we adopt the technology of digital dynamic waveform correction, which can compensate the delay between control signal and output waveform, and ensure the accuracy of control. at the same time, the technology of digital dc component adjustment was introduced, by which we can exactly compensate the control signal, and realize adjusting dc component of output on the premise of output performance
在基於dsp的數字變換器平臺中，採用全數字波形校正技術，完全補償了控制信號延時、功率管開關延時以及死區時間對輸出spwm波形所產生的畸變，充分保障了變換器控制的準確性；採用數字直流分量調節技術，可以精確地對控制信號進行補償，在充分保證輸出性能的前提下，實現了輸出直流分量的調節。In the brief introduction to geographical information system ( gis ), this dissertation proves that by combining reliable management with gis technology, presents a method which built the power structure model and math calculation model by using spatial data in a good interface between computer and user. this dissertation makes a number of target for calculating the distribution system, mainly aimed at circumstances which have an effect on power station repair, switch breaker, type of t connection, and double lines supply via the usage of system reliability calculation. at the same time, it provides the projected estimatio n when power station or transmission line will be added into the power system, and furnishes the theoretical information that the professional needs for power structure programming, design and equipment management
通過建立輸變電設施管理信息系統（ mis ） ，真實地反映出油田電網輸變電設施的運行管理現狀，為網路可靠性計算提供可靠的計算依據；在簡述地理信息系統（ gis ）技術的基礎上，論證了可靠性管理與電力gis技術結合的可能性，創立了在簡潔的人機圖形界面下利用空間數據建立網路結構模型及可靠性計算模型的方法；通過建立網路可靠性計算系統，進行了計及變電所檢修影響、切換開關、 t接點及雙回線供電情況下的可靠性指標計算分析，對油田電網及變電所（線路）的改（擴）建方案、增強性措施及接入系統的可靠性給予了工程評估，為電網規劃、設計及日常的設備管理提供分析決策依據。Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。And so, the gis - based electric cable information management system can administrate transformer substation, switch substation, power distribution room, power cable, silo, canal and high voltage user according to their location, drawings, cable records. the system provides multiple index for query service and statistical electric cable graph and information on properties
本系統可以實現對變電站、開關站、配電室、電纜、豎井、溝道及高壓用戶等空間位置、圖形資料（包括一次接線圖、竣工圖、斷面圖） 、電纜臺帳信息的綜合管理；並可按多種方式來查詢、檢索、統計電纜圖形及屬性數據信息。In the synchronous " model, based on the idea of polygonal flux linkage locus, by means of constructing the switch state period table of three phrase voltage inverter is required. in the brushless model, the igbt ( isolated gate bipolar transistor ) switch state period table is gained by gal ( generic array logic ) which analyzes the signal of position feed - back
在同步方式下，基於多邊形磁鏈軌跡法的思想，用作圖法求得三相電壓型逆變器的pwm波形序列；在無刷直流方式下，用gal對位置反饋信號進行邏輯綜合，得到開關管的導通規律。The spwm control has a good waveform but the dc bus voltage utilization is low
Spwm控制波形質量好，功率管開關頻率低但直流電壓利用率低。How to regulating telecommunication industry has been a problem which is related to the social development and needs a in - depth research from the theories and practices. however, reformation in the telecommunication industry is not going easily. regardless which nation, at the process of telecommunication industry opening, all suffered the resistance of the different degree
如何對電信產業實施科學、合理、有效的監管，形成一個有效競爭的電信格局，成為政府入世之際，在開放市場引入競爭階段，必須解決的問題，它關繫到全社會的發展和千千萬萬普通民眾的切身利益，需要從理論和實踐上進行深入的研究。Surface flashover across the insulators in vacuum is the major limitation of the performance of the high power system, such as high power microwave tube, pulse power switch, high - energy linear accelerator, etc. flashover studies are of considerable importance in many applications. alumina ceramics are used widely in vacuum insulation system. the flashover and charging performance have been systematically investigated on alumina ceramics in vacuum under pulse voltage ( 0. 7 / 4 ^ 8 )
真空中絕緣子沿面閃絡現象是制約高功率微波管、脈沖功率開關、高能粒子加速器等系統性能的主要原因，這是因為真空中絕緣子在一個比自身及相同真空間隙擊穿電場低得多的電場下就發生了表面閃絡的緣故，研究真空中絕緣子沿面閃絡現象及其形成機理對于改善和提高系統性能有重要意義。In this paper, the working principle of the interleaving two - transistor forward converter is analyzed in detail, and the waveforms of the switch drain - to - source voltage and transformer magnetizing current are researched in different duty cycle conditions. the simulation model is constructed and the simulation results verify the analysis
本文分析了交錯並聯雙管正激變換器的工作原理，研究了在不同占空比條件下開關管的漏源電壓和變壓器勵磁電流波形，建立了模擬模型，模擬結果證明理論分析的正確性。These topologies of inverters are composed of two bi - boost dc / dc converters, they are symmetry. so whole circuit turn into four - quadrant converters, we can control every power mosfet on or off. then we can get sine wave with direct current polarization at the left, at the same we also can get sine wave with direct current polarization phase contrast 180 compared of the left at the right
這類逆變器由左右二個雙向boostdc / dc變換器構成，左右二邊是對稱的，所以整個電路構成了一個四象限變換器，我們可以恰當控制各功率管的開、關，使左邊的兩象限dc / dc變換器輸出一個帶直流偏置的正弦波，使右邊的兩象限dc / dc變換器輸出一個相差180度帶同樣直流偏置的正弦波形，這樣，負載zl上的電壓是左、右兩個dc / dc變換器電壓的差動輸出，正好可以消掉直流偏置，最終在負載r1上得到的就是正弦波。In this paper, researching and producing on current waveform control system of inverter carbon dioxide welding machine is given. the overall plan, the design of hardware structure, the programming and debugging of software is described in detail. the bang - bang and alterable structure discrete pid synthetic control algorithm are used to modulate the width of pwm signal in real time, to acquire the fiat character by driving and controlling the opening and shutting time of igbt, the technology of " double impulse " is adopted to realize electric current waveform control
本文介紹了逆變波形控制co _ 2焊機控制系統的研製，詳細闡述了總體方案的制定、硬體研製及軟體的編寫與調試，採用變結構、離散型pid + bang - bang復合控制演算法、實時調節輸出pwm信號的脈沖寬度，驅動控制用於逆變的大功率開關管igbt的開通與關斷時間，獲得逆變焊機平外特性。The system will display the gate status, the thunder status and fire signal status. it allows the management clearly receiving running status of all facilities and subsystems in the central control room. the system graphically displays the alarm position, informs management by phonetic alarm and provides relevant disposal method for the management, which reduce cost of undesired contingency
虹口稅務局基於節能和高效管理的考慮，在夜間，如果雙鑒探頭檢測到有人活動，則自動控制燈光開啟與關閉，同時聯動視頻進行錄像，並在界面上實時反映門的開關狀態防雷的狀態消防信號的狀態等，讓機房管理人員通過機房監控系統統能夠全面地了解機房內所有設備和子系統的運行狀態，並形象地顯示報警發生的位置，進行語音提示，同時提示相應報警的處理方法，將損失減少到最小。According to the test conditions, the double polarity inputting mode is adopted in the circuit of voltage - frequency converting part ; storage batteries are used in the optical emission part of optical fibre isolating and transmitting device, that can guarantee isolation between the main circuit and the testing system ; the 89c51 singlechip is used in the singlechip testing - controlling unit, the peripheral circuits are extended, data are transmitted through the serial port in this part ; the p opular software delphi5. 0 is used in the pc part, the communication between singlechip and pc by serial port, plotting of current wave, regulation of data ; the optical - electrical isolating and triggering are used in the controlling part, this can guarantee the veracity and reliability of breakers triggered, this triggering mode is also used in the triggering of the main closing breaker, the tested breaker and the assistant breaker, the triggering signals are sent out by a singlechip
壓頻轉換部分電路中根據實際情況採用了雙極性輸入方式；光纖隔離傳輸裝置的光發射部分電源採用了蓄電池供電，確保了主迴路與測試迴路的完全隔離；單片機測控部分採用了89c51單片機，擴充了外圍電路，通過串口向pc機傳送數據； pc機與單片機之間的串口通訊、波形繪制、數據管理等都採用了軟體delphi5 . 0編寫。該測試系統中預留了輸出口，可以對合成迴路中的主合閘開關、被試開關、輔助開關進行觸發，信號由單片機發出，控制部分採用了光電耦合隔離觸發的方法。軟體設計主要集中在對電流信號的數據採集、數據處理、數據傳送、人機界面、波形繪制和數據管理，軟體部分又可分為單片機和pc機程序設計兩大部分。This kind of switch use the unilateral fin - line as the basic transmission line, the beam lead pin diode of alpha co. ltd is the control element, there is two diodes in each channel and they are welded in circuit in parallel connection
本課題主要研究的是毫米波鰭線pin管單刀雙擲開關。該開關採用單側鰭線作為基本傳輸線，控制器件選用alpha公司的梁式引線pin二極體，每路使用兩只，採用並聯形式焊接在電路中。This thesis mainly analyze the structure of switch the circuit ' s form and some of manufacturing technic. under the given frequency band, the switch has flat capability of insert loss and isolation, and can satisfy the need of millimeter - wave system
本課題主要對開關的結構、電路形式及製作工藝等方面進行了一定的分析，使得毫米波鰭線pin管開關在給定頻率范圍內，具有平坦的插入衰減和隔離度特性，滿足毫米波系統的需要。Orb product by inprise company, as intermediate to construct distributed computation emironment based on corba software. adopt access data base to administer the related data. choose c + + builder and java as pre - developing tools
主要工作包括：選用inprise公司的orb產品visibroker作為中間件構建基於corba的分散式計算環境，採用access數據庫管理相關數據，選擇c + + builder和java作為前端開發工具，后臺服務程序採用fortran編寫，介面語言為idl ，圖形模擬採用opengl 。In mechanical pressure switches, the form or change in position of a switching membrane, bourdon spring or pressure piston is transferred to one or more microswitches that are integrated into the housing and take over the actual switching operation ; the switching hysteresis is fixed or adjustable
在機械壓力開關中，開關隔膜，波登彈簧或者壓力活塞的形狀或位置改變，轉移到一個或多個集成在箱中的微動開關。這些微動開關事實上接管了開關操作。開關磁滯特性固定或者可調。Besides the reduction of the voltage stress of the switches, by adopting proper control strategy, some tl converters have the tl waveforms across the filter, so the filter can be significantly reduced
在這些變換器中，如果採用適當的控制方案，除了可以降低變換器開關管電壓應力外，部分變換器還可以在輸出濾波器上得到三電平電壓波形，大大改善了濾波器的工作條件。分享友人