有效電平變換 的英文怎麼說

中文拼音 [yǒuxiàodiànpíngbiànhuàn]
有效電平變換 英文
active level transformation
  • : 有副詞[書面語] (表示整數之外再加零數): 30 有 5 thirty-five; 10 有 5年 fifteen years
  • : Ⅰ名詞(效果; 功用) effect; efficiency; result Ⅱ動詞1 (仿效) imitate; follow the example of 2 ...
  • : 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...
  • : Ⅰ形容詞1 (沒有高低凹凸 不頃斜) flat; level; even; smooth 2 (高度相同; 不相上下) on the same l...
  • : 動詞1. (給人東西同時從他那裡取得別的東西) exchange; barter; trade 2. (變換; 更換) change 3. (兌換) exchange; cash
  • 有效 : effective; valid; efficacious
  1. Monitor apparatus can measure valid value of three phase voltage and current, power factor, three phase disequilibrium, instant flecker of short time and harmonic without twenty, degree and harmonic distortion total. the paper are laid on the following. ( 1 ) master plan and function of circuit, ( 2 ) hardware design including circuit and principle of a / d conversion, phase lock, liquid crystal display and keystroke and so on, ( 3 ) design of system software including digital filtering, fft, a / d conversion and monitor interface of pc, ( 4 ) system test

    監測儀能夠完成包括三相壓、三相流的值、功率因數、三相不衡、壓短期閃、以及20次內的諧波、諧波相位、諧波失真總量等的測量。論文重點介紹了以下幾部分: ( 1 )路的總體設計和功能; ( 2 )硬體設計,包括a d轉、鎖相環、液晶顯示和按鍵輸入等原理和路。 ( 3 )系統軟體設計,包括a d轉、 fft 、數字濾波等程序的原理和演算法以及上位機監控界面的設計; ( 4 )系統測試。
  2. Meanwhile, fundamental principles about electroless tin plating by reducing agent and disproportionation reaction were explained. function of every component in the bath was explained that complexing agent can effectively change the potential of copper and tin, and accelerate the beginning of replacement reaction favorably ; reducing agent can increase the rate of chemical reaction and has the effect of promoting reaction dynamics too ; antioxidant can effectively prevent sn2 + in the bath from being oxidated ; additive agent a can improve the stability of the bath ; additive agent b has such effects as refining and brightening for the tin deposits, and it enlarges the range of brightening section ; additive agent c used as leveling agent can not only make the depostis level off, but also improve the dispersive ability of the bath ; surface - active agent can solve bubble problem which gathered on the surface of the deposits, and improve the surface quality of the deposits and the bath stability

    闡述了鍍液中各組分的作用:絡合劑能地改銅、錫的位,促使初期的置反應順利進行;還原劑能加快化學反應速度,對反應動力學積極的促進作用;抗氧化劑能地防止鍍液中sn ~ ( 2 + )的氧化;添加劑a能提高鍍液的穩定性,添加劑b對鍍層能細化和光亮作用,擴大了鍍層光亮區的范圍;添加劑c作為滑劑,不僅能增強鍍層表面的整性,而且能提高鍍液的分散能力;表面活性劑較好地解決了化學鍍過程中汽泡在鍍件表面聚集的問題,提高了鍍層的表面質量和鍍液的穩定性。
  3. The potential applications of amr include both civil and military communication, especially non - cooperative communications and communication confrontation, such as identifying signals, supervising signals, distinguishing interference, electronic confrontation, analyzing military threat, etc. on the basis of our analysis to the existing research on feature abstraction, the related feature abstraction methods are optimized in this paper, resulting several effective methods such as the feature abstraction based on transformation domain, stepped voltage level analysis, normalized carrier - free spectral energy analysis, squared signal and fourth powered signal analysis, etc. both the decision theory based on recognition algorithms and the artificial neural network ( ann ) based on recognition algorithms is analyzed, and the former is selected as it is more appropriate for this research

    調制類型的自動識別廣泛應用於民用通信與軍用通信,尤其是對于非合作性通信、通信對抗,比如:信號確認、信號監控、干擾辨識、子對抗、軟體無線子救援、通信對抗、軍事威脅分析等。本論文在分析現研究的基礎上,借鑒了已的特徵提取方法,對相關調制類型特徵提取方法進行了優化,使用了一些的方法,如基於域特徵提取方法、梯層分析方法、剔除載波后的歸一化頻域能量分析方法、信號方后的頻譜分析方法、信號四次方后的頻譜分析方法等。通過對基於決策理論和基於人工神經網路兩種識別演算法進行分析,本論文選擇了較適合的基於決策理論的識別演算法。
  4. Efficient to lose fat, adopt micro - computer technology to make the vibration strongly effect on the abdomen, which part with most fat of the body. inner - desighed strong motor effect on the organism directly. unique auto change direction mode, makes the full dimension vibration of the organism

    迴旋塑身腰帶運用微腦技術,將強振動裝置直接作用於脂肪最為集中的腹背部,內置的強力的動機直接作用於肌體,產品獨的大幅度的水移動自動方向運動模式,使肌體大范圍全方位共振,同時加快身體血液循環,微腦控製程序可自動逐步增強產品運動力度,使用過程中自動轉運動方向。
  5. A x - band six - cavity tro is studied. with the voltage 760kv 6ka and the magnetic field 2. 6t in the simulation, output power is about 1. 5gw is obtained, and interaction efficiency is 31 %. a noveland high accurate numerical synthetic technique is presented for determining the high frequency characteristics of six - cavity with open boundary

    對粒子模擬的輸出微波功率的作出診斷,找到讀取微波功率快速的方法:在場和磁場同相的前提條件下,對時域波形進行傅立葉,微波功率頻域的二倍頻所對應的幅度即為微波x波段渡越輻射振蕩器的理論和實驗研究均功率的大小。
  6. With promulgation and obliging actualization of iec 1000 - 3 - 2 etc. international standards, power factor correction ( pfc ) technique become a hotspot of research in power electronics field. based on average current mode, the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response. the control - loop circuit is realized using digital control and the corrector can tend to unity power factor, lower current harmonics and high transfer efficiency

    本文在流模式控制的源功率因數校正技術的基礎上,設計了一種控制路基於數字信號處理器( dsp ) 、主路採用boost器拓撲結構的全數字單相功率因數校正器,用數字路代替傳統的模擬路來實現對整個迴路的控制,最終使得校正器具輸入功率因數接近於1 、低流諧波以及高轉率的特性。
  7. Multilevel inverter technology is a pop research in high voltage and high - power converting fields. it can synthesize multilevel output with the distribution of dc voltage and the combination of different switching actions to reduce voltage stress across the switches and bulk of the equipment, and lessen output harmonic distortion and switching loss of the inverter

    器是當前高壓大功率領域中的研究熱點之一,它通過對直流側的分壓和開關動作的不同組合,實現多階梯波輸出壓,能地減小器件承受的壓應力,縮小裝置體積,減小輸出壓諧波和開關損耗。
  8. With the strong dsp as the control unit, the design of main circuit structure is provided, and the control policy for the main circuit loop, the tuning of the triggering angle for thyristor are given

    在具體的系統實現中,器主迴路選擇環流控制方式,採用高性能dsp作為模糊控制核心,通過加權均判決的模糊決策演算法對器主迴路晶閘管的觸發角進行調制,從而控制輸出壓波形。
  9. The test results demonstrate that this prototype has excellent comprehensive performances such as small bulk, lower weight, high efficiency, high steady precision, fast dynamic response, wide range input voltage, good output waveforms, strong over - load and short - circuit ability, and strong function with different nature load and three - phase unbalanced load

    試驗結果表明,該流器具體積重量小、率高、靜態精度高、動態響應快、輸入化范圍寬、輸出波形質量高、過載與短路能力強、帶不同性質負載和帶三相不衡負載的能力強等優良的綜合性能。
  10. The validity and superiority of all these are proved by use the parallel converter of novel upfc to implement reactive current compensation, zero sequence and negative sequence currents compensation, harmonic currents compensation and the mixed compensation of them. this thesis also studies that use novel upfc to implement two phases operating in high - voltage transmission lines by theory analyze and simulation testify

    提出了基於多器的廣義大功率流補償的概念,提出了適合於它的多環定時滯環控制方案,通過用新型upfc的並聯器實現無功補償、零序和負序補償、諧波補償及它們的綜合補償來驗證了其性和優越性。
  11. In the course of design, we fully consider the actual conditions on the railway and take a series of corresponding measures to the concrete problem. such as we select high - accuracy microconvertor and have the converted function in succession data collecting system chip aduc812, design v / f circuit and external a / d circuit. in anti - interference of the hardware, we try to disperse each function module to avoid interfering each other, adopt photoelectric isolated technology to dispel the circuit connection of input and output. in controlling we import arithmetic mean into strain wave algorithm and real computing technology of virtual value for sample treatment of data, that is using the software to smooth away interfere error and to calculate actual value, thus it makes the precision of the data improve greatly

    在設計過程中,根據系統要求,充分考慮鐵路上的實際情況,針對具體問題採取了一系列的相應措施,如在器件選擇方面選用高精度microconvertor系列、具adcdma連續轉功能的數據採集微控制器晶元aduc812 ,設計了v f路和外部a d轉路;在硬體抗干擾方面,將每個功能模塊盡量分散獨立開來以避免相互干擾、採用光隔離技術消除輸入輸出通道上的路聯系;在控制方面對于采樣數據的處理引入了算術均值濾波演算法和真值的計算方法,即通過使用軟體來濾除系統中干擾造成的誤差並計算真值,從而使數據的準確性得到極大地提高。
  12. It can also determine the fault spot and reason. this technology has been used in some technological fields and proved efficient. it has promoted the revolution of maintance system and the historial protection is replaced by preventive maintenance. with this technology, we can improve the reliability of machine and decrease the maintance fee. recently, reserch has pick up a fervent pace in the area of fault diagnosis of electrical machines. the paper simply analyzes the fault reason of electrical machines, stressly describes and explores the methods of condition monitoring and fault diagnosis such as partial discharge, stator current, rotating speed, vibration etc. fault prognosis is now include diagnostic feature, reason, spot. prodigious improvement in signal processing hardware and software has made this possible. primarily, these techniques depend on locating specific harmonic components of the fault. these harmonic components are usually diffirent for diffirent types of faults. automated tools such as fuzzy logic based system is also simply presented in the paper

    本文從絕緣結構的故障機理入手,以絕緣結構故障的典型特徵? ?局部放為研究對象,重點討論局部放的在線監測方法、適用場合併比較它們的優缺點;在分析籠型異步機轉子斷條在線監測的定子流監測方法后,根據其缺陷,本文探討了溫升不衡法、希爾伯特數字濾波、小波包分析法的原理及優點;以機軸承、氣隙偏心等故障為研究對象,通過對機振動和轉速頻率的檢測,診斷機的故障類型;本文的重點工作是將人工智慧技術中的模糊技術應用於機的狀態監測和故障診斷中,力求使機故障診斷更接近人工智慧化;最後,本文對機狀態監測和故障診斷系統進行了硬體和軟體初步設計,為實現預測維修提供了的技術手段。
  13. Three - level converter is a novel technology that is produced and developed in 1980 ' s. three - level ladder output voltage is accomplished by dc - side division voltage and different switch combination, and the capacity of converter system and endure voltage are efficiently improved, and the output voltage harmonics and switch loss are reduced

    流器是20世紀80年代產生並發展起來的一種新興流技術,它通過對直流側的分壓和開關動作的不同組合,實現三階梯波輸出壓,能地提高流器系統地容量和耐壓,減少輸出壓諧波和開關損耗。
  14. Chaotic switching signal obtained from chua ' s circuit was used to control buck dc / dc converter. by compared the power spectrum of input current between chaotic modulations and classical pwm, it demonstrate that chaotic switching modulations have good effect on spreading power spectrum, which can be used to reduce the level of emi and to improve emc of smps

    通過對四種混沌調制模式下器輸入流與周期pwm模式下輸入流頻譜的分析比較表明,混沌調制技術在擴展頻譜方面良好的果,可以用於降低開關模式源的磁干擾( emi )水,改善磁兼容性( emc ) 。
  15. The study shows that this control approach can overcome those shortages of the methods which are adopted to control voltage and reactive power in substation nowadays, it can hold the voltage level in the regular bound and maintain the balance of reactive power in substation to the greatest extent, and it have the ability to seek the best solution. adopting this methods, the switching times of loaded taps and capacitors can be decreased efficiently and advance the running life - span of the transformer and capacitors and improve the economy benefits. this control approach is a advanced way ii and it is worth to study more and utilize

    利用模糊神經網路對較好地實現對站的壓、無功自動控制,能克服了目前在壓無功控制中普遍運用的分區方法存在的不足之處,不但可保持壓在合格的范圍內,盡量維持無功功率衡,而且具較好的尋優能力,減少壓器載調壓開關的切次數和容器組的投切次數,提高了壓器和容器的運行壽命,提高了經濟益,是一種值得進一步探索和運用的較為先進的方法。
  16. First, because pipelines are so complex that controlled object is high order, delay, coupling, nolinear and time - varing, it is difficult to realize closed loop control for it using valid mathematic model. to resolve this problem, the paper presents a fuzzy - pid control algorithm with self - adjusting regulation factor. second, if a moving motor supplied by inverter power is switched to be supplied by power supply, the impact of overload - voltage and overload - current appears

    主要針對中、大容量供水系統中,由於供水管網鋪設復雜、彎管多、控制對象具高階、滯后、耦合、非線性及參數時的特點,難以利用的解析式數學模型進行閉環控制,以及多臺水泵並聯運行時,水泵機由源供向工頻源供過程中產生的過壓過流沖擊這兩個難題,提出了可調整因子fuzzy - pid控制演算法及利用鎖相環控制實現水泵機由源向工頻源的同頻同相滑切
  17. The small - signal model in main circuit are built by using average circuit model. the relationship of each small signal and efficiency duty cycle are described completely. magnitude - frequency characteristics and phase - frequency characteristics of each main transfer function are got

    本文分析了全橋移相zvspwmdc - dc器的基本原理,運用均等路法建立了主路小信號模型,並詳細分析了各小信號量與占空比之間的關系,得到了各主要傳遞函數的幅度和相位頻率特性。
  18. We take the peak current controlled dc / dc boost converter as an example. we compare and analyze power spectrum of input inductance current quantitatively of chaotic operation and periodic operation of converter. the computer simulation results demonstrate that power spectrum of input current has lower peak of power spectrum of chaotic operation than it of periodic operation, and then emi level is reduced

    以一個峰值流控制dc dcboost型器為研究對象,在分析路混沌現象的基礎上,分別對該路工作于混沌和周期兩種狀態下的輸入流頻譜進行了定量分析對比,證實了在相同輸出壓條件下,工作于混沌狀態下路輸入流的頻譜與工作于周期狀態下路輸入流的頻譜相比,頻譜峰值減小,具降低emi水果。
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