time variation 中文意思是什麼

time variation 解釋
變化性
  • 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 ...
  • variation : n 1 變化，變動。2 變量，變度，偏差。3 【語言】語尾變化；變體，異體；【數學】變分，協變；順列；【...
  1. The whole problem related to the time - variation of the load is completely solved by the proposed method, the core of which lies in the tva model structure

    整個過程中，模型結構的改進是其中的關鍵。大區電網負荷建模研究是從模型應用角度研究對不同物理地點的負荷進行建模的問題。
  2. Then, time - variant load characteristic is decomposed and the tva load model structure is proposed to reduce the effects on the time - variation of the amplitudes of the load. finally, the group algorithm and hypothesis testing strategies are applied to solve the problem of the time - variation of the load components

    進一步對負荷特性的時變性進行分解，提出了tva負荷模型結構以消除負荷幅值大小時變性的影響，最後，採用分組演算法和假設檢驗的工程應用策略，解決了負荷組成成分的時變性問題，從而最終從一定程度上解決了負荷的時變性問題。
  3. Time - variation reliability analysis based on ultimate strength of corroding ship girders

    考慮腐蝕影響的船體梁極限承載能力時變可靠性分析
  4. The whole thesis consists of three parts. firstly, we establish the meteorological disaster database of jilin province and deduce the statistic frequency of the main meteorological disaster on the base of choosed meteorological disaster index. the spatial distribution law and time variation of drought, flood and low temperature cold damage are concluded with the gis technology

    全文主要由三部分組成：首先，在選擇氣象災害指標的基礎上，建立了吉林省氣象災害數據庫，統計主要農業氣象災害的發生頻率，然後利用gis技術得到吉林省旱澇、低溫冷害的空間分佈規律和時間變化。
  5. The dissertation proposes originally the idea of decomposing the time - variant load to solve this problem. first, the time - variant load is decomposed into the time - variant load characteristic and the time - variant load model due to the modeling method. second, the multi - curve approximation method is proposed to identify the load parameters, which to a great extent, reduces the effects on the time - variation of the load model from modeling method

    針對負荷的時變性，論文首次提出了將負荷時變性分解的思想，首先將負荷的時變性分解為負荷特性的時變性和由建模方法引起的負荷模型的時變性，然後提出了多曲線擬合參數辨識方法，很大程度上消除了建模方法引起的負荷模型的時變性。
  6. 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。
  7. The transverse stiffness limitation index ? the permissible ultimate width / span ratio b / l of the continuous steel truss girder of railway bridge is analyzed in accordance with the analytic theories of random vibration of train ? bridge time - variation system and the required derailment coefficients and comfort of drivers and passengers in train running through the bridge. the limitation index in question may be referred to in the design of the continuous steel truss girders of railway bridges

    基於列車-橋梁時變系統隨機振動分析理論，按照橋上列車脫軌安全系數和司機、旅客舒適度的要求，對鐵路連續鋼桁梁橋橫向剛度限值-橋梁容許極限寬跨比b / l進行了分析，對鐵路連續鋼桁梁橋的設計具有一定的參考作用。
  8. Analysis of time variation of precipitation in beijing

    北京城區陣雨徑流水質分析與評價
  9. In order to better understand the excited mechanism of masers, we have studied the time variability of 22 ghz h2o masers in ggd25, an outburst with the time scales of 4 day was detected. the time variation was probably caused by a collsion pump which led to changes in the pump input

    為了更好地理解脈澤的產生機制以及脈澤和恆星形成區的一些典型現象，如它們所聯系的遠紅外源之間的關系，我們研究了22ghzh _ 2o脈澤源的時變以及所有已知的6 . 7ghz甲醇脈澤源的統計性質。
  10. Because return of chinese security market is non - normal distribution, so we use garch - t model which can describe the time - variation of volatility and the high - peaked and heavy - tailed characteristics of return to calculate var value of market index. from empirical results we know that this model is efficient

    考慮到中國證券市場收益率序列分佈的非正態性，本文使用了既能描述方差時變性又能反映收益率分佈的尖峰、厚尾特徵的garch - t模型計算市場指數的var值，實證結果表明該模型是有效的。
  11. According to the time variation and feature extraction difficulty of rotating machinery vibration signals, the rule of choosing wavelet basis function and wavelet denoising soft - thresholding value is proposed after making further research on wavelet transform technique, using for denoising rotating machinery vibration signals the conception of " energy " is proposed, based on the theory that signals energy in all frequency can be affected by faults deeply, to construct feature vectors of rotating machinery vibration signals which can give a convenient disposal way to fault feature extraction and fault intellectual diagnosis

    針對旋轉機械振動信號的非平穩性及特徵難以提取的特點，通過對小波變換技術的進一步研究，提出旋轉機械振動信號處理的小波基函數選擇原則及小波包消噪的軟閥值原則。利用小波包變換對旋轉機械振動信號進行消噪處理和特徵提取。並以「能量」為元素，構造旋轉機械振動信號的特徵向量，從而為旋轉機械振動信號的故障特徵提取以及后續的故障智能診斷提供了一種便捷的處理方法。
  12. In this dissertation, wind, vehicle and bridge are regarded as an interactional coupling vibration system., in the analysis model of the system, many factors are considered in detail, such as the fluid - solid coupling interaction between wind and bridge, the solid contact coupling interaction between vehicle and bridge, the stochastic wind load of vehicle, the time variation characteristic of the system induced by train movement

    本文將風、車、橋三者作為一個交互作用、協調工作的耦合振動系統，較全面地考慮了風橋間的流固耦合作用、車橋間的固體接觸耦合作用、風對車的空間脈動作用及整個系統的時變特性。
  13. Abstract : according to the characterestic of resistance furnace temperature control, temperature rising one - way control, large time delay and time - variation of parameter, using method of fuzzy compositional rule of inference establish fuzzy model and design fuzzy cntroler. in order to increase control system precision, it gives a fuzzy variable k, and sets parameter self - adjusting fuzzy control system. this system can on line self - adjusting controller parameters according to the error and variations of the error. it makes the system steady precision improved

    文摘:根據電阻爐溫控制的特點，即只有升溫單向控制、滯后較大且具有參數時變性，利用模糊推理合成法建立模糊模型並進行模糊控制器設計，為提高模糊控制的精度，引入模糊變量k ，構成參數自調整模糊控制系統.該系統可根據誤差和誤差變化在線自動調整控制器參數，使系統的穩態精度得到改善
  14. Automatic block interval time variation of nanjing - chuxian section on jin - pu railway line designed by our institute won the excellent design prize of the first national excellent designs

    我院設計的津浦線南京至滁縣段自動閉塞變更間隔時分工程項目榮獲第一屆國家優秀設計獎。
  15. According to the characterestic of resistance furnace temperature control, temperature rising one - way control, large time delay and time - variation of parameter, using method of fuzzy compositional rule of inference establish fuzzy model and design fuzzy cntroler. in order to increase control system precision, it gives a fuzzy variable k, and sets parameter self - adjusting fuzzy control system. this system can on line self - adjusting controller parameters according to the error and variations of the error. it makes the system steady precision improved

    根據電阻爐溫控制的特點，即只有升溫單向控制、滯后較大且具有參數時變性，利用模糊推理合成法建立模糊模型並進行模糊控制器設計，為提高模糊控制的精度，引入模糊變量k ，構成參數自調整模糊控制系統.該系統可根據誤差和誤差變化在線自動調整控制器參數，使系統的穩態精度得到改善
  16. The electromagnetic field theory and the variation method is applied to found the 2d mathematics model during the process of starting of the induction machine with compound cage rotor. the dispersion, element analyse and collectivity composing of time - variation field are given

    利用電磁場理論和變分法建立了復合籠條轉子感應電動機起動時二維電磁場的數學模型，給出了正弦時變場單元分析過程和離散格式以及最終的總體合成方程。
  17. The performance of hf data transmission systems is badly constrained by the hf channels what are characterized by the rapid time variation and dispersion

    高頻通道的變參性以及時間彌散特性嚴重影響短波數據傳輸的性能。
  18. Although the research of industrial robotic manipulators and their control algorithms has had a long history, it ' s difficult to apply many algorithms to real plants because of the high non - linearity, high coupling, time variation of the system, problem in model accuracy, computation consumption and equipment costs

    工業機械手及其控制演算法研究已經有了幾十年的歷史。但是由於工業機械手是一個高度非線性、強耦合、時變的系統，模型精度問題、龐大的計算量和設備成本成為了很多理論演算法投入生產實踐應用的「瓶頸」 。
  19. In this paper, based on the characteristics of force and deformation of pars, the time - variation of the elastic coefficient of fulcrum in the calculation model of pars is analyzed and studied ; and the lessening of rigidity coefficient of elastic fulcrum, which is caused by the continual bottom soil resilience beside the piles and the increase of excavation depths during different steps, is discussed

    摘要根據樁錨支護結構的受力和變形特點，研究分析了樁錨支護結構計算模型中支點彈性剛度系數的動態時變性；討論了隨樁內側坑底土的持續反彈以及不同工況下隨著基坑開挖深度的逐漸增大，進而導致彈性支撐剛度系數的減小的變化規律。
  20. Because every process are classical time - variation system whit multivariable, long delay time, nonlinear and destabilization and every process has themselves special requirements, considering of their common features the paper write out a three - level intelligence control system which give each process suitable methods

    對中藥生產過程各工段控制方法的研究是本文的重點，由於中藥生產的各主要工段都是典型的多變量、大時延、非線性、帶擾動的時變系統，並且中藥生產過程各工段均有其特殊工藝要求。
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