比率差動保 的英文怎麼說

中文拼音 [bǐlǜchādòngbǎo]
比率差動保 英文
bias differential protective system
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 保 : Ⅰ動詞1 （保衛; 保護） defend; protect 2 （保持） keep; preserve; maintain in good condition 3 （...
  • 比率 : ratio; proportion; rate比率計 ratio meter
  1. Aiming at such problems in combustion system of homemade middle and miniature boiler, as a complex system with the character of dead zone, time variation, serious non - linearity, large time delay, coupling and a lot of disturbance, this paper presents a new set of optimal control resources. by using well - matched control method on system, stable automatic running is realized. having the serious divulgence coals difference a lot from each other in character, instability of chemistry, value of lowest emission of heat, home - made boiler controller is not at all ideal. instead of traditional model that controls the ratio based on proportional control or with the correct signal of the amount of oxygen, this paper, combined with intellect control theory - - fuzzy control and self - optimizing concept, propounded a kind of fuzzy self - optimizing controller to be used in air supplying system of the boiler, and expatiates on the idea of dividing the control process into two parts, dynamic and static to realize, thus meets the demand of homemade boiler economic running

    本設計針對國產中、小型電站鍋爐燃燒系統參數時變、嚴重非線性、干擾因素復雜、耦合嚴重、模型不易確定的特點，提出多變量協調控制方案，解決了系統可控性差，難以實現穩定自動運行的問題；在此基礎上，改變以往以煙氣含氧量控制送風的傳統模式，針對國產電站鍋爐設備主體及一、二次送風迴路泄露嚴重，煤種混雜、成分不穩定、燃燒發熱值低、燃燒效率不高等問題，應用智能控制理論中的模糊控制技術，結合自尋最優控制的思想，設計了一種模糊自尋優控制器，應用在電站鍋爐送風控制系統上，並闡述了動靜態兩種實現途徑，通過在線優化風煤配比，實現最佳經濟燃燒，切實保障了鍋爐的經濟運行。
  2. Secondly, theoretical models for time series, such as garch, egarch, tarch and garch - in mean, and the methods of parameter estimation are introduced. then, these models are employed to test the volatility in shanghai a - share, shanghai b - share, shenzhen a - share and shenzhen b - share. next, in chapter 4, we study the co - integration and test the granger causality between the four share indexes. finally, the spillover of volatility between a - shares and b - shares markets are tested

    第二，通過模型的比較分析，發現殘差基於t分佈的arch類模型較之基於正態分佈和ged分佈的arch模型能更好地刻畫我國股指收益率序列的特徵。第三，滬深a股在兩個階段的變化甚微，保持著非對稱效應，對利空消息的波動大於利好消息的波動，風險補償為正向，且風險補償系數的變化不大。
  3. Even if the fault spread from external fault zone to internal fault zone, the differential protection can avoid misoperation. main criterion of protection is composite - percentage current differential algorithm according to every sampled value, which can accelerate the protection ' s trip, reduce large amounts of calculation and have strong stability to ta saturation

    本文採用基於采樣值的比率制動式電流差動保護演算法作為保護的主判據，可以明顯提高保護動作速度和減少計算量；具有較強的抗ta飽和能力，在區內故障時無制動，區外故障時有極強的制動特性。
  4. In order to improve the behavior of transformer protection that is incomplete at present in distinguishing magnetizing inrush current from fault current, the paper puts forward a kind of new principle of transformer differential protection after analyzing the characteristic of magnetizing inrush and active power consume of transformers. this protection uses differential protection based on positive sequence active power as a criterion to discriminate internal faults from magnetizing inrush, and ratio restraint differential current protection as a signal to touch off the protection

    針對當前電力系統中變壓器保護由於勵磁涌流鑒別理論不完善而導致的誤動率相對較高的問題，論文在分析了變壓器勵磁涌流特性和有功損耗的基礎上，提出了用變壓器正序有功功率差動作為區別勵磁涌流和故障電流的判據，並以成熟的比率制動差流保護作為內外部故障判據的變壓器主保護。
  5. The thesis has done the widespread investigation and study to the domestic and foreign ’ s technologies of analogy low voltage and low power, and analyzes the principles of work, merts and shortcomings of these technologies, based on the absorption of these technologies, it designs a 1. 5v low power rail - to - rail cmos operational amplifier. when designing input stage, in order to enable the input common mode voltage range to achieve rail - to - rail, it does not use the traditional differential input pair, but use the nmos tube and the pmos tube parallel supplementary differential input pair to the structure, and uses the proportional current mirror technology to realize the constant transconductance of input stage. in the middle gain stage design, the current mirror load does not use the traditional standard cascode structure, but uses the low voltage, wide - swing casecode structure which is suitable to work in low voltage. when designing output stage, in order to enhance the efficiency, it uses the push - pull common source stage amplifier as the output stage, the output voltage swing basically reached rail - to - rail. the thesis changes the design of the traditional normal source based on the operational amplifier, uses the differential amplifier with current mirror load to design a normal current source. the normal current source provides the stable bias current and the bias voltage to the operational amplifier, so the stability of operational amplifier is guaranteed. the thesis uses the miller compensate technology with a adjusting zero resistance to compensate the operational amplifier

    本論文對國內外的模擬低電壓低功耗技術做了廣泛的調查研究，分析了這些技術的工作原理和優缺點，在吸收這些技術成果基礎上設計了一個1 . 5v低功耗軌至軌cmos運算放大器。在設計輸入級時，為了使輸入共模電壓范圍達到軌至軌，不是採用傳統的差動輸入結構，而是採用了nmos管和pmos管並聯的互補差動輸入對結構，並採用成比例的電流鏡技術實現了輸入級跨導的恆定;在中間增益級設計中，電流鏡負載並不是採用傳統的標準共源共柵結構，而是採用了適合在低壓工作的低壓寬擺幅共源共柵結構;在輸出級設計時，為了提高效率，採用了推挽共源級放大器作為輸出級，輸出電壓擺幅基本上達到了軌至軌;本論文改變傳統基準源基於運放的設計，採用了帶電流鏡負載的差分放大器設計了一個基準電流源，給運放提供穩定的偏置電流和偏置電壓，保證了運放的穩定性;並採用了帶調零電阻的密勒補償技術對運放進行頻率補償。
  6. Under the pattern of cyber - education, open laboratories are becoming inseparable parts which still are weak in the process of teaching. as for electric experiment category, there are many problems in common, for instance, less safe in equipment systems, less functional in instrument protection, thus forcing students to spend large quantity of time reviewing, recording, and analyzing data, while students do experiment only with less time, which have negative effect on purpose of experiment, at the same time, this does not reflect benefits that internet brings us

    然而當前大多數高校的實驗教學環節還比較薄弱，其中對電類實驗來說存在諸多共性問題，比如：實驗系統安全性差，儀表保護功能少，導致實驗器材損壞嚴重：儀表性能不穩定，零漂、溫漂現象嚴重，元器件線性度校正不夠，儀表測量精度差；學生做一次實驗要花大量時間記錄數據、整理數據、寫實驗報告，真正用在做實驗上的時間並不多，從而使實驗效率大大下降；同時也沒有充分利用校園網所帶來的便利和信息共享及互動的功能。
  7. We select crm without coal as reference ; select semi - dynamic atmosphere to operate machine ; use the method fixing the temperature of hearth and that of sample holders when the analysis begins, which ensures the consistency of heating samples ; adopt the dta curve of " at - t " to analyzing crm heat, which decreases possible influences from the fluctuation of heating velocity ; draw conclusions that crm proportion and granularity influence the analysis little, but not crm moisture and coal species ; advise that there be a warm - up to the crm with much moisture before analysis and a modification to the crm with variable species of coal ; then obtain the feasible operation conditions and operation curve ( together with the curve function )

    選用白生料作標樣；選用準動態測定氣氛；採用恆定爐膛溫度（ 650 ）和固定支持器初始溫度（ 60 ）的方法，確保了樣品受熱過程的一致性；採用「 t ? ? t （時間） 」 dta曲線分析生料熱，減少了升溫速率的微弱變化對測定結果的可能影響；得出生料配比和細度對差熱儀測定結果影響小、生料水分和煤品種影響大的結論，並提出對大水分生料測定前要進行預熱處理、對不同品種煤的測定結果要進行修正的建議。最終，得到了差熱儀適宜的工況條件和工作曲線（及方程） 。
  8. Firstly, the paper introduced the commonly hardware configure of microcomputer relaying and the function of every module of industry controlling computer std90386. secondly, the paper introduced several types busbarprotection which was commonly installed on electric power system and the characteristic of mv or lv system with low current grounding. based on it, the paper put forwards the theory of percentage - restraint differential relay. after that, in the discussing every problems of the relaying working the paper put the emphasis on the negative effect of the ct saturation and countermeasure

    本文首先介紹了微機保護裝置的一般硬體配置以及作為裝置硬體平臺的std90386工控機各組件模板的功能，然後分析了目前電網系統裝設的母線保護的各種類型以及中、低壓小電流接地電網的特點，在此基礎上分析、介紹了作為本保護動作原理的「比率制動式差動保護」原理。
  9. The license plate automatic recognition systems of now - days still have some shortage : it is too expensive, the recognition speed is not fast enough, and the ratio of recognition is not high enough. after all, because the whole lpr system is based on pc software it is hard to protect the right of the lpr system

    目前的牌照識別系統不僅實現價格的比較高、機動性能差，還存在著識別速度慢，識別率和穩定性差的問題，而且，因為整個系統都是基於通用計算機地軟體，不利於軟體知識產權的保護。
  10. The results suggest fraud companies have higher debt ratio and proportion of other receivable to current assets, slower short - term liquidity, have lower ratio of days " sales in receivables, adjusted operational cash flow per share and smaller equity ' s centralization extent than nonfraud companies have. beside non - fraud companies, fraud companies are easier to receive non - standard unqualified auditing opinion

    實證結果顯示：舞弊公司與非舞弊公司相比有更高的負債比率、其他應收款占流動資產的比重，更差的短期償債能力，更低的應收賬款周轉率、調整后每股現金和股權集中度，也更容易被注冊會計師出具非標準無保留審計意見。
  11. A lot of applications in broad bandwidth ip network are based on non - real - time communication by comparison with atm. we present dynamic virtual rate scheduling policy and limited difference - of - clock hybrid packet scheduling. they do n ' t only guarantee upper bound of traffic delay that is equal to vc and wfq ' s, but also optimize non - real - time communication by way of preventing real - time traffic from unfairly engaging network resource

    相對atm網路，寬帶ip網路中有大量的網路應用以非實時通信為基礎，本文提出了動態虛速率調度策略和有限時鐘差混合包調度演算法，與vc 、 wfq等調度演算法相比，不僅同等地確保實時通信的最小時延上界，而且通過限制實時通信對網路資源的不合理佔用，使得實時通信和非實時通信公平合理地共享網路資源，優化了非實時通信的轉發性能，改善了網路資源的有效利用率。
  12. Deposit insurance is also quite common now and so deterioration in the quality of the loan book of a bank with low capital adequacy is less likely to undermine the confidence of depositors and lead to a banking crisis

    此外，存款保障制度現已頗為普及，因此當某一間銀行資本充足比率低而貸款質素又變差時，存戶信心受到動搖以致觸發銀行危機的可能性將會較小。
  13. The main contents of the study include such aspects as follows : ( 1 ) the moving vehicle auto - detecting grid arithmetic is studied and presented on the basis of the idea of the image difference arithmetic. the moving vehicle is detected whether or not to enter the field of view by calculating the grid dissimilarity between the current frame image and the reference frame image. dsdr ( dissimilarity descend rate ) is defined, and by calculating it the position of the moving vehicle in grids can be determined exactly, so the vehicle model image can be saved conveniently

    本文所進行的研究主要包括以下方面： （ 1 ）在圖像差分演算法基礎上，研究提出了運動車輛自動檢測的柵格演算法，該方法通過計算當前幀與參考幀對應柵格的不相似度來檢測是否有運動車輛進入視場；定義了不相似度下降率dsdr ，基於此，可以比較準確地確定出運動車輛在柵格中的位置，並可方便地將車輛圖像作為模板保存下來。
  14. Its main functions are : differential overcurrent time protection, ratio differential protection, blocking when ct wiring broken

    保護配置有： 1差動速斷保護2比率差動3 ct斷線閉鎖
  15. Biased differential protection

    比率差動保護裝置
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