電源優選 的英文怎麼說

中文拼音 [diànyuányōuxuǎn]
電源優選 英文
power source optimization
  • 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...
  • 源 : 名詞1. （水流起頭的地方） source （of a river）; fountainhead 2. （來源） source; cause 3. （姓氏） a surname
  • 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
  • 電源 : source; current source; electric source; power pack; power supply; power source; source of power ...
  1. Abstract : a cad tool based on a group of efficient algorithms to verify, design, and optimize power / ground networks for standard cell model is presented. nonlinear programming techniques, branch and bound algorithms and incomplete cholesky decomposition conjugate gradient method ( iccg ) are the three main parts of our work. users can choose nonlinear programming method or branch and bound algorithm to satisfy their different requirements of precision and speed. the experimental results prove that the algorithms can run very fast with lower wiring resources consumption. as a result, the cad tool based on these algorithms is able to cope with large - scale circuits

    文摘:介紹了一個基於標準單元布圖模式的電源線/地線網路的輔助設計集成工具.它應用了一系列高效的演算法，為用戶提供了電源線/地線網路的設計、優化和驗證的功能.非線性優化技術、分枝定界演算法和不完全喬萊斯基分解的預優共軛梯度法是該工作的三個主體部分.用戶可以選擇使用非線性規劃的方法或者幾種分枝定界方法來滿足他們對于精度和速度方面的不同需求.實驗結果表明，文中所提供的演算法可以在很快的運行速度下實現更低的布線資源佔用.因此，在這些有效演算法基礎上實現的輔助設計工具具有處理大規模電路的能力
  2. 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。
  3. In the thesis, the strategy for china to develop the hydrogen energy system about fuel cell vehicles is analyzed firstly. then a case in beijing is studied, which is based on an imaginary but possible fcb ( fuel cell bus ) project in beijing, 2008. in the case, 11 feasible plans of hydrogen energy systems about fuel cell vehicles are evaluated from all the aspects of energy, environment and economy with lca ( life cycle assessment )

    論文首先從宏觀角度分析我國應該採取的燃料電池汽車氫能系統發展戰略；然後從微觀角度運用生命周期評價方法對一個假想的，卻極有可能在未來實施的燃料電池汽車氫能系統案例的所有可行方案從能源、環境和經濟三方面進行評價，選出最優方案並討論改進方向；最後對燃料電池汽車氫能系統的安全性進行評價並總結現有工作中存在的問題，展望氫能系統評價的發展方向。
  4. By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it, the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step. while the electronically tuned filter abates the image interference and notably improves the selectivity. the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper

    課題中所採用的pll或dds pll鎖相頻率合成方法充分發揮鎖相環良好的窄帶跟蹤濾波特性，並結合dds的高頻率解析度、高頻率精確度和高速頻率捷變等優點，分別實現了系統所要求的高質量寬帶本振源和小步長頻率捷變；採用電調諧選頻技術，則大大改善了接收機的選擇性和抗干擾能力。
  5. The project will lie in the newly developed industries district of yian town of jiexiu city, at which transportation system is advanced and the water, electricity resources are plentiful

    該項目選址在介休市義安鎮新興發展的工業區內，交通便利，水電資源充足介休市又確定對煤石綜合利用的企業實行減免稅優惠政策。
  6. Simulation and optimization of large hpp construction : to pursue best construction proposal by optimizing theory and method and applying information technology, including layout of access, providing and allocation of construction equipment, coordination of construction progress, arrangement of resources, selection and arrangement of construciton materials to develop three - dimensional modelling and optimize the system

    大型水電工程施工模擬與優化? ?根據當前水電工程施工組織與管理的現狀，通過優化理論與方法、信息技術等的應用，尋求最優化的施工組織方案，包括施工道路的布置、施工機械的配備與調度、施工進度的協調、施工資源配置、施工材料的優選、料物的優化調配等，開發工程施工三維模擬與優化系統。
  7. Modulization is one of the directions in power electronics. multi - module redundant parallel operation is a good solution to realize high reliability and large capacity of power system

    模塊化被公認為當今電源變換技術發展的重要趨勢之一，多模塊冗餘並聯運行方式是實現高可靠性、大功率電源系統的優選方案。
  8. The techniques with two different methods are classified as : the mode of pulse width modulated, and the difference of control signal. the advantages and disadvantages of each method is analyzed and compared, and where each method is more adapted to is pointed out. a type of switching power supply management ic based on current mode control method is designed which is a pwm boost converter

    本文全面分析、描述了dc - dc開關電源變換器的控制方法，並依據脈寬調制的方法何採用控制信號的選取對控制方法進行了分類，詳細闡述了各種控制方法的基本原理，分析比較了他們各自的優缺點，指出了每種控制方法所使用的場合。
  9. With fast development of our country " s gas industry and air ' s increasingly serious contamination in city, using gas instead of coal and supplying energy in high efficiency and cleanliness has become necessary way in city. there are different problems in the current heating ( air conditioning ) systems. in the cogeneration system, heat and power affect each other, heating - pump heating ( aie conditioning ) system can not satisfy the peak load very well, the cost of gas fuel in boilor heating sestem is so high. the high generating efficiency of the diesel - engine two - sourse heating ( air conditioning ) systems is limited in range of 100kw - 1000kw, the heating scope is so limited. combined cycle of two sourse heating ( air conditioning ) system is most suitable selection to buesness community with big scope my paper aim at this syetem ' s primary question when it is applied in our country - - - - bringing project into execution and technology economy feasibility and off - design performence, combined with a certain demonstrating project in beijing buesness community, going along with calculating and analyzing, drawing out some efficient datas and conclusions, based on this, bringing out primary alements affecting combined cycle of two sourse heating ( air conditioning ) system " economics

    熱電聯產系統熱電相互牽連，熱泵供暖（空調）系統不容易很好地滿足尖峰負荷，鍋爐供暖系統供熱中天然氣燃料構成的成本過高，內燃機雙源供暖（空調）系統的高發電效率僅限於100kw - 1000kw負荷范圍，供熱面積有限。對于大面積的商業園區、居民小區，燃燒天然氣的燃氣-蒸汽聯合循環雙源供暖（空調）系統是最佳選擇之一。本論文針對該系統在我國應用時的主要問題- - -方案的技術實施與技術經濟可行性，結合北京某一商業園區示範工程，進行了系統的計算與分析，得到了有效的數據與結論，在此基礎上，提出影響聯合循環雙源供暖（空調）系統經濟性的主要因素，並進行敏感性分析，得出有益的結論；最後通過各種供暖方案的比較分析回答了某些人對該系統的疑慮和不解，並指出系統的優化方向。
  10. This thesis analyses from following angles why speeding hydroelectric power exploitation is necessary for social and economic sustainable development of sichuan province : first, structure of power and resource of sichuan province requires accelerating hydroelectric power exploitation ; second, abundant water resource is advantageous for sichuan accelerating hydroelectric power exploitation ; third, comprehensive benefit results from hydroelectric power projects demands accelerating hydroelectric power exploitation ; forth, hydroelectric power exploitation stimulates development of other crafts ; fifth, construction of large scale project is beneficial for reducing resource cost of the whole society ; last, the process of hydroelectric power exploitation usually consists of much scientific and technological content

    本文從下述幾個方面分析了大力發展水電是四川社會和經濟可持續發展的必然選擇：四川的能源資源結構要求大力開發水電；四川水能資源的優勢要求大力開發水電；水電工程巨大的綜合經濟利用效益要求大力開發水電，水電工程除了發電效益外，一般還兼有防洪、灌溉、供水、航運、養殖、旅遊等社會效益，水電站的綜合利用可以為社會創造巨大的社會和經濟效益，造福一方；水電開發對經濟廣泛的拉動作用要求大力開發水電；大型水電建設有利於降低全社會資源損耗；水能資源的開發利用過程具有較高的科技含量。
  11. The purpose of eia is to assess the environmental effects due to river basin development playing or proposed hydroelectric project. for the purpose of rationally utilizing natural resources, protecting the environment, improving environmental quality, and maintaining the ecological balance, the optimum plan can be screened out through the comparison of the technical, economical and environmental indices of the alternative plans of the project

    江河流域規劃和水電工程環境影響評價的目的，是從合理利用自然資源、保護環境、提高環境質量和維護生態平衡觀點出發，根據不同工程方案的技術、經濟和環境指標，優選方案。
  12. Jiulin wang ( materials physics and chemistry ) directed by naixin xu, jun yang and jingying xie due to its abundant resources, low toxicity and the highest charge capacity in all known cathode materials, elemental sulfur is a promising cathode material for the next generation of high - performance lithium batteries

    單質硫因具有很高的理論能量密度、豐富的自然資源和無毒性等多種優勢，成為下一代鋰電池中替代licoo _ 2的首選正極材料之一。可是目前報道的li / s電池面臨著一系列嚴重的問題，包括活性物質利用率低，循環性能差等。
  13. But, with the development, it can ’ t meet the need of modern manufacture more and more. as a result, handhold digital storage oscilloscope is studied. handhold dso is an important genre of digital storage oscilloscope, it ’ s outstanding feature include small form, use battery instead of ac supply for power, and include the whole function of dso while implementing the basic function of multimeter. handhold dso can measure wave range automatic, analyze wave use cursor, measure resistance 、 diode and short circuit if choice digital multimeter

    手持式數字存儲示波器是數字示波器的一個分支，它具有體積小、重量輕、便於攜帶、電池供電、無須外接交流電源等優點，它集數字萬用表（ dmm ） 、數字存儲示波器於一體，可自動對信號進行幅度的測量，也可用光標對波形進行分析，同時還可以通過菜單選擇來實現對電阻、二極體以及電路通斷的測試;可以選擇觸發通道和觸發模式。
  14. Under the background of the autonization of the distribution network, the paper designed the on - line monitoring and condition maintenance system of the distribution network based on the idea of condition maintenance and the application of the modern inspection technique. first, it designed the construction and the function of the system from the point of view of the optimization of the resource of the whole system. then it made the comparition and the selection of the manner of communication of the whole system. finally, it analysed the function of the gis system and dicussed the basis construction and function of the on - line monitorning and conditon maintenance system of distribution network. at last, it discussed the advanced application of the distribution system based on on - line monitoring and condition maintenance system

    本文在計劃檢修的基礎上，採用了狀態檢修的思想，並結合現代檢測技術的應用，以配電網實現自動化改造為背景，提出了基於配電主站的配電設備在線監測與狀態檢修方案：從系統整體資源優化配置的角度，進行配電網在線監測與檢修系統的結構設計和功能設計；對配電網在線監測與狀態檢修系統結構中重要的通信系統進行了比較和選擇；分析gis系統功能，描述了基於gis的在線監測與狀態檢修系統的基本結構及功能，討論了gis數據基礎上的在線監測與狀態檢修系統的高級應用。
  15. 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。
  16. In new 2004, schneider electric will further extend its low end control product lines, which include power supply and plc with new products launching and product upgrading. the goal is to provide the customers more quality products and multi - selection interest

    2004年施耐德電氣小型自動化產品線將進一步豐富，從開關電源到plc將有一系列新產品發布和產品升級，旨在為用戶提供更優質的產品和更多元的選擇。
  17. Tr electric provides robust and flexible designs for current transformers from 40. 5 to 550kv, transformer bushings and wall bushings from 40. 5 to 252kv, and cable terminals from 66 to 110kv. all feature our hv dryshield ? proprietary insulation and allow our customers to reliably and safely insulate, meter and protect their hv systems

    我公司生產的有機復合絕緣乾式系列產品，其優秀品質源於先進的技術均勻的電場設計優質新材料的選用現代化的生產工藝和嚴格的制度管理，更源於我們有一支老老實實做人踏踏實實做事朝氣蓬勃嚴肅認真的職工隊伍。
  18. Its being used can form high efficiency insulated switching power supply without using utility power transformer. the switching power ic is selected firstly in the design of high power switching power supply, precision switching power supply, application specific switching power supply and so on in the world, which has been making switching power supply short, small, light and thin the control techniques of dc - dc switching converters are completely described and analyzed

    單片開關電源管理集成電路具有高集成度、高性價比、簡單外圍電路、優越性能指標等優點，能構成高效率無工頻變壓器的隔離式開關電源，目前已成為國際上開發中、小功率開關電源、精密開關電源、專用開關電源以及開關電源模塊的優選集成電路，使得開關電源正朝著短、小、輕、薄的方向發展。
  19. Circuit design is the basis of design of demultiplexer. speed, power and chip area are the main factors that should be considered in circuit design. every circuit structure has its merits and drawbacks, e. g. cmos logic family has a slower speed, but lower power, smaller area, scfl ( source couple fet logic ) family has a higher speed, but higher power, larger area. we should choose a proper circuit structure or their mixed structure for certain design to get a good tradeoff among the three factors. flip - flop is the fundamental element of demultiplexer, setup time and hold up time are key factors, which influence the speed of circuit, thus the design aim is how to reduce them. in this thesis we place emphasis on the design of scfl latches

    速度、功耗、面積是電路設計要考慮的主要因素，不同的電路形式具有不同的優缺點，如cmos互補邏輯電路功耗低，面積小，速度相對較慢； scfl （源極耦合fet邏輯）電路速度高，功耗和面積較大。所以要針對具體設計需要選用適當的電路形式或其組合結構，以滿足設計要求。觸發器是分接器的基本組成單元，建立時間和保持時間是影響電路速度的關鍵，所以減小建立時間和保持時間是觸發器設計的主要目標，本文著重介紹了scfl鎖存器的設計和優化方法。
  20. 1. nizn ferrite was developed for using in mini high frequency dc - dc converters and inductors. we measured and analysed the parameters of the nizn ferrite, which we concern about when designing the dc - dc converter. 2. the low loss sample of nizn ferrite were chosen for design - optimization of the high frequency transformer. based on the relevant theoretical researches, the loss properties of the magnetic core material and winding were analyzed in this thesis

    因此，以nizn功率鐵氧體材料為開關電源芯材為基礎，並優化各種開關電源的設計已成為國際上的熱點和技術瓶頸，本論文正是以上述背景為研究目標而開展工作的，主要進行的工作和創新有: 1 .對研製的新型高頻低功耗的功率nizn材料進行參數的測試，並針對dc - dc變換器設計關心的參數對芯材特性進行了分析，選擇在特定頻率下，功耗較小的nizn材料磁芯樣品作為變壓器優化設計的預備磁芯。
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