useful voltage 中文意思是什麼

useful voltage 解釋
有效電壓
  • useful : adj. 1. 有用的，有益的，有效的，有幫助的。2. 〈俚語〉值得稱贊的，精通…的 （at）。adv. -ly ,-ness n.
  • voltage : n. 【電學】電壓，電壓量，伏特數。 the working voltage （電氣的）耐壓限度。
  1. Applying relative arithmetic to all kinds of faults and calculating off - line, we can master time - distance relation chart for all kinds of faults. computation indicates : when transmission lines occur faults, the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance. the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle, calculating work voltage by using fault component, calculating the torque created by a phase comparator or a magnitude comparator

    實際的計算表明：輸電線路發生故障后，用故障前後的數據同時充滿保護演算法的數據窗，對于快速切除近區故障具有很重要的意義；同時利用故障前後的數據，下述方法可以比較好地實現距離保護的反時限特性：直接用全周傅里葉演算法進行阻抗計算；採用工頻變化量阻抗繼電器進行工作電壓的計算；採用轉矩的思想進行轉矩的計算。
  2. The results show that the interference components up 1mhz are not mitigated in the equipment, the design should be improved. the hardware and software developed in this paper are useful for characterizing the transient electromagnetic environment of high voltage substations

    利用該系統分析了某繼電保護設備pt端信號採集系統的抗干擾特性，結果表明，該繼電保護設備的抗干擾網路對1mhz以上高頻干擾成分的抑制作用較小，建議改進抗干擾網路的設計。
  3. Vcm represents the common - mode voltage, which contains no useful information about the measurement and could in fact reduce the measurement accuracy

    象電池電壓監視的應用，共模電壓是測量系統所隱含的。
  4. We define the recombination time of excess electrons in p field as the minority carrier lifetime. in theory, we developed the equation between excess minority carriers lifetime and the open - circuit voltage decay ; moreover, the effect of capacitance to general open - circuit voltage is also investigated. both different efficiency solar cells are measured by the method and showed the relations between the minority carrier lifetime and the performance of solar cells, which provides great useful guidelines for fabricating high - efficiency silicon solar cell in industry

    根據太陽電池的工作原理，詳細地論述了用脈沖光源照射n / p結太陽電池時光電壓的產生，理論上給出了注入p區的電子復合帶來的開路電壓與少子壽命的關系，也研究了n / p結勢壘電容放電對開路電壓衰減的影響關系，推導了利用開路電壓隨時間衰減的關系來測量少數載流子壽命的理論公式。
  5. This charged fiber can be directed or accelerated by electrical forces and then collected in mats or other useful geometrical forms. the diameters of electrospun fibers are in the range of tens of nanometers to several micrometers. in this paper, polyacrylonitrile ( pan ) nanofibers are made by electrospinning pan / dimethylformamide ( dmf ) and pan / dimethylacetamide ( dmac ) with adjusting the main process parameters including electrostatic voltage ( 20 ~ 50kv ), sprinkler aperture ( 0. 5 ~ 0. 8mm ), collection distance ( 15 ~ 25cm ), solution concentration ( 6 wt % - 14 wt % )

    本文主要對聚丙烯腈（ pan ）二甲基甲酰胺（ dmf ） 、 pan二甲基已酰胺（ dmac ）體系進行電紡絲，調節靜電壓（ 20 50kv ） 、噴頭孔徑（ 0 . 5 0 . 8mm ） 、接收距離（ 15 25cm ） 、溶液濃度（ 6wt 14wt ）等過程參數，制得pan納米纖維，纖維平均直徑在200 1000nm ；詳細分析了過程參數對纖維細度、形態等的影響，認為高聚物溶液濃度及靜電壓對纖維細度有決定性影響，其它過程參數如接收距離、噴射孔徑、紡絲溶液溫度、溶液電導率等的調整應以這兩參數為基礎進行。
  6. Also, the lack of coil heating, which minimizes contact potential, makes latching relays useful in very low voltage applications

    此外，由於線圈不會發熱，從而使接觸電勢最小化，使得閉鎖型繼電器被廣泛用於電壓非常低的應用中。
  7. This conclusion is useful to optimize the converter. then it is proposed that the effects of retraining bias - magnetic and reducing the voltage stress of mosfet should be both considered in selecting the clamping capacitance

    本文提出對于推挽正激的關鍵參數? ?箝位電容的選取要綜合考慮對偏磁的抑制作用和對功率管尖峰的抑制作用，並給出了選取方法。
  8. Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available

    如果有相配的電壓，可以煮少量水的便攜式熱水裝置是有用的。
  9. By carefully selecting the voltage taps, the correct voltage output to match the resistance of the elements over their complete useful life can be made

    仔細選擇電壓插孔，選擇和電阻相匹配的輸出電壓值，這樣可以延長其有效使用壽命。
  10. Abstract : a method to estimate error of measureing electrical power for nonsinusoidal ac with intelligent instrument is presented in this paper. it is useful to ac circuit controlled by scr. using this method and calculating by computer, the errors of power and voltage and current can be estimated accurately

    文摘:介紹了估算智能瓦特表測量非正弦交流電功率誤差的方法，它適用於各類晶閘管控制的非正弦交流電路.採用這一方法並用計算機計算，可較準確的算出電功率、電壓和電流的誤差
  11. The plots showing the effect of length, duty - cycle and sensor performance are given. some useful conclusions are deduced, which give us another new practical way to fabricate working - well optical voltage sensor

    文章討論了ppln不同長度、不同占空比對該電壓傳感性能的影響，並給出了圖示，得到了一些很好的結論，為製作光學電壓傳感器提供了另一種可行的新途徑。
  12. This kind of on - load tap changer has the merits of advanced structure, operating reliably, long useful life and maintenance freely, it is suitable for oil - immersed three - phases transformer with frequency 50hz, rated voltage 35kv and below and rated current under 400a and below

    統一設計的有載分接開關，具有結構先進，動作可靠，使用壽命長，維護方便等優點，適用與50hz ，額定電壓在35kv及以下，額定電流在400a及以下的三相油浸式變壓器。
  13. Which measurement technique do you think will be the more useful ? in fact, voltage measurements are used much more often than current measurements

    你認為哪個測量技術更有用呢？實際上，電壓測量比電流測量更經常用到。
  14. It refines and describes some useful refactorings during the research and development of automatic voltage control system of provincial network

    提煉並描述了在開發省級電網自動電壓控制系統過程中應用的若干重構方法。
分享友人
分享到 Line

分享到臉書