short time load 中文意思是什麼

short time load 解釋
短時負荷
  • short : n 蕭特〈姓氏〉。adj 1 短的；短暫的。 （opp long）。2 矮的；低的 （opp tall）。3 短期的。4 簡短的...
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  • load : n 1 裝載，擔子；負擔；工作（負荷）量。2 （車船等的）裝載量；一馱，一車，一飛機。3 【電、機】（機...
  1. The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability, but also the necessary precondition of enhance power system stabilization, to remove faulty line quickly and accurately, also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple, reliable and good - selective protection manner to any variety of transmission lines, power system development needs current differential protection apply to transmission lines, moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly, the paper discusses, analyses the research and application transmission line protection in detail, compare the principle and realistic presupposition of general line pilot protections secondly, because conventional current vector differential protection are influenced easily by load current and transitional resistance, in order to at the same time quicken protection act, the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied, results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability, sensitivity and anti - saturation of current transformer in addition, synchronous current sampling methods at all terminals of line is analyzed and estimated lastly, the principle and criterion. also device design about current sampling values differential protection based on optical fiber communication, which apply to short transmission lines are concretely investigated,

    基於基爾霍夫定律的電流差動保護無論對於何種形式的輸電線路都是一種簡單、可靠、選擇性強的保護形式，電力系統的發展使得電流差動保護應用於線路保護成為需要，而電子、通信技術的發展使得電流差動保護應用於輸電線路成為可能。首先，本文對目前線路保護的研究和實際應用情況進行了討論和分析，比較了常用線路縱聯保護的實現原理和實現條件及優缺點。其次，針對常規相量電流差動保護易受正常負荷電流和故障過渡電阻影響的缺點，同時為加快差動保護的動作速度，對基於故障分量瞬時采樣值電流差動保護的原理、判據、動作特性等作了討論和分析，結果表明基於故障分量瞬時采樣值電流差動保護在可靠性、靈敏度、抗電流互感器飽和方面明顯優于常規相量電流差動保護，對電流差動保護各端的同步采樣方法和數據通信也進行了分析和評價。
  2. This thesis is concerned with two problems : static and dynamic simulation for natural gas pipeline network and short - time natural gas load forecasting

    本文主要研究了天然氣管網系統穩動態模擬和天然氣短期負荷預測兩個問題。
  3. Based on the day - schedule, short - term load forecast, and monitoring program for spinning reserve, the economic dispatch of east china power grid can be realized, which can ensure time margin for load balancing

    在日計劃編制的基礎上，結合超短期負荷預計及旋轉備用監視程序，對華東電網各省市的口子及直屬電廠實行經濟調度，使調度在進行出力及負荷平衡時有一定時間裕度及科學依據。
  4. Based on the discussions of the conventional and recent methods of short term load forecasting such as time series, multiple regression approaches and artificial intelligence technologies, this paper presents a hybrid short term forecasting model which combines the artificial neural network ( ann ) and genetic algorithm ( ga ). in order to improve the convergence speed and precision of the back - propagation ( bp ), a new improved algorithm - the adapted learning algorithm based on quasi - newton method is given

    本文首先分析比較了電力系統短期負荷預測的傳統方法時間序列法和回歸方法以及最近的專家系統和神經網路技術的優點和不足，然後針對人工神經網路bp演算法的不足對其進行了改進，採用了基於擬牛頓的自適應演算法，它提高了網路學習效率，具有較快的收斂速度和較高的精度。接著提出了改進的遺傳演算法來改善神經網路的局部收斂性。
  5. The analyzed results are as follows : the late 1960 ' s cutoff of riverbends increased both the runoff amount and the sediment transport amount of the lower reach of jingjiang river, while the sediment deposition decreased in the lkngting lake area ; after the mid 1980 ' s, both the middle reach of yangtze river main stem and the dongting lake occurred a trend of decreasing annual sediment transport as a result of decreasing sediment releasing from the upper reach of yangtze river ; and in the recent 3 years ( 2003 - 2006 ), the three gorges reservoir first impoundment additionally reduced the sediment concentration in the middle reach of yangtze river flow with a long time, so a distance would be quite long for suspended sediment recovery, but the distance for bed - material load of suspended sediment recovery would be quite short

    分析結果表明： 20世紀60年代下荊江裁彎后，三口（松滋口、太平口、藕池口）分流分沙減少，下荊江徑流量和輸沙量相應增加，洞庭湖泥沙淤積減少； 80年代中期以後，長江中游幹流及洞庭湖出口的年輸沙量呈減少趨勢，城陵磯至武漢河段河床由淤積轉為趨向沖淤平衡；三峽工程初期蓄水運用后，長江中游含沙量沿程恢復距離較長，但床沙質部分恢復距離相對較短。
  6. The formulas on crack width of rc beams and src beams are analyzed at home and abroad too. the calculation formulas on the maximum crack width of src beam under short time load are suggested. the calculation result tallies that of tests well

    分析比較了國內外鋼筋混凝土梁和勁性鋼筋混凝土梁裂縫計算公式，提出了勁性鋼筋混凝土梁在短期荷載作用下的最大裂縫寬度計算公式，其計算值與試驗值吻合較好。
  7. For short - time natural gas load forecasting. based on analyzing tech situation at home and abroad, considering all kinds of factors which will have influence on load changes, a hybrid approach combined the self - organizing feature map ( sofm ) neural network with multilayer perceptron ( mlp ) is presented, and short - time load forecasting model is established

    針對大然氣短期負荷預測的問題，在分析了國內外技術現狀的基礎上，綜合考慮影響負荷變化的各種因素，提出了基於白織織競爭網路和多層感知機網路棍合的大然氣短期負荷預測方法。
  8. The ball mill load - control apparatus adopted the assembly language and the c51 language to program and its concerned software was designed, including the data collection, the wave - percolation, the short - time average over - zero ratio, the estimation of the power chart and the average - period chart

    磨機負荷控制儀軟體使用匯編和c51編程，本文進行了相關軟體的設計，包括數據採集、濾波、短時平均過零率、功率譜估計和平均周期圖等。
  9. It was demonstrated that this sort of load - control apparatus has superior performance. we used a electric transmitter as the transducer to collect the sound signal, using the daq toolbox of the matlab to achieve the collection of the sound signal, and using the dsp toolbox of the matlab and the sound - launch technology to analyze the time - domain characteristic and the frequency - domain characteristic of the signal, chiefly analyze its short - time average amplitude, its short - time over - zero ratio and its estimate of the power chart and the average - period chart

    實驗中使用了駐極體話筒作為球磨機聲音拾取傳感器，利用matlab中的數據採集（ daq ）工具箱實現對磨音的採集，利用matlab信號分析（ dsp ）工具箱和聲發射技術對磨音進行時域和頻域分析，主要分析磨音的短時平均幅度和能量、短時平均過零率、功率譜估計和平均周期圖。
  10. A series of specimens with circular sections were tested, which included the short - term behavior of 24 frp - confmed concrete specimens under different load eccentricities and the long - term behavior of eight frp - confined concrete columns under different load ratios. an attempt to predict the time - dependent behavior of frp - confined concrete columns and beam columns with circular sections is proposed by the aci209 ( 1997 ) specifications model

    本文進行了frp約束混凝土柱的一系列試驗研究，包括24個frp約束混凝土構件在不同偏心率情況下的一次加載試驗研究和8個frp約束混凝土軸心受壓構件在不同軸壓比情況下在長期荷載作用下的力學性能試驗研究。
  11. An improved method for short - term electric load forecasting using time series techniques

    一種應用時間序列技術的短期電力負荷預測模型
  12. On theoretic aspect, the slope stability question on static load had matured gradually, many countries had produced corresponding criterion and use them in engineering practice. the soil nailing structure is applied widely because of several excellences, such as low cost, short time limit and better adaptability

    從理論研究的角度看來，目前關于邊坡在靜荷載作用下的穩定問題的研究已逐漸成熟，各國都制定了相應的技術規范用於工程實踐;其中土釘支護結構由於其經濟、適應性強、效果好和施工快捷方便等優點，近年來得到了廣泛應用。
  13. Either the collision between ship and bridge or ship and anti - collision equipment is a complicated non - linear dynamic response process under extreme large load in a very short time. because of the complicacy and the uncertain factors in collision process, it is nearly impossible to make theoretic analysis by building up an accurate mathematic model

    無論是船-橋相撞或是船-防撞裝置相撞都是一個十分復雜的碰撞動力學問題，是兩者在很短的時間內在巨大沖擊載荷作用下的一種復雜的非線性動態響應過程，且碰撞過程中存在多種不確定性因素，因此企圖通過建立一個精確的數學模型使問題得到完全解析是不可能的。
  14. Secondly, how to actualize economical operation of transformers in substations which load fluctuates frequently is analyzed. and the resolvent that the change time of operation mode of transformers in substations is confirm scientificly, according as the real - time data and the result of the short - term load forecasting, is bring forward

    分析了負荷波動較大的變電站如何實現變壓器實時經濟運行，提出了以短期負荷預測的結果為參照，以實時數據為依據科學地確定變電站變壓器運行方式改變時機的解決辦法。
  15. Applying the put forward model and the all - around classic genetic algorithm into the daqing medium - low level voltage distribution network to optimize the real power network, find classic project of reactive power equipment deploy. at the same time, analyze the ecnomic effect. the result shows that the put forward model and the all - around classic genetic algorithm has a lot of virtue, such as strong applicability, handy calculation, good ability of finding the best, easy spreading and applying into real power syatem short term load forecasting, and so on

    5 ）研究分析結果表明：論文提出的城市配電網無功優化補償數學模型和全局最優遺傳演算法較全面、有效地解決了城市配電網無功優化補償的問題，具有適用范圍廣、尋優能力強、計算簡便、綜合效益好等優點，為全局最優無功優化補償提供了新的、科學的方法，易於在實際電網無功優化補償中推廣應用。
  16. Based on the population migration neural network, a new method for short - time load forecast is proposed

    依據人口遷移演算法的神經網路，提出一種短期負荷預測的新方法。
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