excitation time 中文意思是什麼

excitation time 解釋
點火時間
  • excitation : n. 1. 刺激，興奮，激發，鼓舞。2. 【物理學】激發；【電學】激勵、勵磁。3. 【植物；植物學】激感（現象）。
  • 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 ...
  1. Aliquots of cells were mixed 0. 15 % mg / ml fb - 28, and kept at 4c for 30min, fusion assays were conducted : fluorescence was measured immediately at regular time - points with fluorescence spectrophotometer with an excitation wave length of 560nm and emission wave length of 590nm. the percentages of membrane fusion was calculated. by monitoring fusion using the r18 assay, we found that the fluorescent brightener 28 influenced membrane fusion of virus and midgut epithelia cells

    此外，採用分子探針r18 （熒光標記物）標記病毒囊膜，體外分離中腸上皮細胞，將標記的病毒粒子與離體中腸上皮細胞混合后保溫，病毒吸附zh后，通過檢測熒光的變化來監測病毒粒子與上皮細胞的融合。
  2. In this dissertation, correlative research of longer - term voltage stability have been carried out, including some slow dynamic elements, such as on - load tap changer ( oltc ), maximum excitation limiters ( mel ), etc. the effects of these slow dynamic elements on the course of voltage instability or collapse are revealed from the point of view of time - domain simulation

    本文基於pss e程序中的擴展動態模擬模塊，對考慮有載調壓變壓器（ oltc ） 、最大勵磁限制器等慢動態元件的中長期電壓穩定進行了相關的研究，從時域模擬的角度揭示這些慢動態元件在電壓崩潰過程中所起的作用。
  3. The system hardware circuits of tipct and the measures for improving the quality of original thermal image are mainly discussed. the primary research content and innovation are as follows : the innovation is that some methods have been proposed to impove the quality of orginal thermal image, such as controlling excitation time, increasing temperature, reducing noise and enhancing emissivity, and so on

    本文主要圍繞電路故障檢測儀的系統硬體電路和熱圖像質量改善方法進行闡述，主要的創新點和研究內容如下:本文主要的創新點是:提出了改善熱圖像質量的幾種方法，如激勵時間控制、增溫法、降噪法和提高發射率法等。
  4. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  5. With the use of the average excitation energy approximation and the closure approximation, the solution is reduced to a time - dependent operator acting on the " bare " atomic state

    利用平均激發能近似和完備關系，可將此波函數簡化為一個含時的相乘算符作用於無場時的「裸原子」態上。
  6. In order to eliminate the influences caused by temperature, electrode - polarization and autoeciousness - capacitance, the traditional instrument has added complicated circuits so that it cause such shortcomings as big error, time - retardation and a relatively small scope. through the problems caused by 2 - probe electrode and ac current source, a new measuring circuit based on the excitation of bi - directional voltage pulse and the sensor of 4 - probe electrode is proposed, using single - chip to achieve auto - temperature compensation

    作者在參閱國內外大量相關參考文獻的基礎上，從電導測試技術的原理性研究出發，分析了採用交流激勵源、兩電導電極為傳感器的傳統電導測試系統所面臨的種種問題，提出並研製了一種基於雙極性脈沖電壓激勵、以四電導電極為探頭、運用單片機進行溫度自動補償的新型電導率測量系統。
  7. Source excitation and parameter extraction for time - domain simulation of rectangular waveguides

    矩形波導時域模擬中的激勵源設置和參數提取
  8. In this paper, the stl technique with cw modulated top - hat beam excitation is investigated theoretically and experimentally. 1. the theoretical model based on the fresnel diffraction integral is developed to describe the stl signal excited with the cw modulated top - hat beam for the first time to the best of our knowledge

    本論文提出採用連續調制的平頂光束作為激勵光的表面熱透鏡技術測量薄膜吸收的方法，主要開展了如下工作: 1 .建立了連續調制的平頂光束作用下樣品的表面熱透鏡信號模型。
  9. Using field transformation ideas and split - field method to solve the difficulty of setting periodic boundary condition when excitation is abnormally incident, and founding time domain function for analysis of fss

    採用場變換思想和場分裂方法，建立相應的時域迭代公式，解決了平面波斜入射情況下周期邊界條件設置中的困難。
  10. Design of control angle measure on interface equipment of real - time simulation system for the excitation regulator

    實時勵磁模擬系統介面裝置中控制角測量模板的設計
  11. We considered the frequency chosen character of erf and its modulatory ability may be owe to the coupling of microwave and the polaritons. at the same time there may be other coupling effect and excitation too

    初步認為頻率選擇性及透過強度可調控性與電流變液和微波之間的相互作用導致的極化激元之間的禍合有關。
  12. 4. the nanoparticles of zns : eu3 + were synthesized for the first time. the energy transfer process between the zns host and the eu3 + ions was observed form the excitation spectra

    合成納米zns : eu3 +和eu3 + 、 mn2 +共摻體系，首次成功通過eu3 +離子的本徵發光的激發譜觀察到基質zns向eu3 +離子有能量傳遞過程。
  13. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  14. By making use of the time dependent covariance and cross covariance formula which used to calculate the non - stationary response under earthquake random excitation and deduced by xiyuan zhou and hu in 1965, the covariance and cross covariance formula of the four envelope models was deducted and the result of four models compared

    本文通過應用周錫元、胡聿賢在1965年提出的計算地震動隨機激勵作用下非平穩響應的時變自相關方差和時變互相關方差公式，分別推導了四種包線函數模型的時變自相關方差和時變互相關方差表達式，並比較了四個模型的結果。
  15. Based on netomac, a software package for power system simulation, the model and algorithm of pre - dispatch schedule in generation markets, excitation system parameter setting, and power system small signal stability anaylsis are studied in this thesis. the main work is as follows : a model of pre - dispatch schedule is proposed, whose target is to minimize the market purchasing price ( mpp ) in the whole pre - dispatch period. then according to the characteristics of pre - dispatch schedule, the model of pre - dispatch schedule is simplified to minimize the mpp in each pre - dispatch time, and a three - step algorithm of pre - dispatch schedule is designed : dealing with the optimal problem in the whole period of pre - dispatch with static planning method, solving the problem of combination of machines with pr1 method, resolving problem of optimal power flow ( opf ) with modified powell method

    本文基於netomac模擬軟體，以發電市場預調度計劃模型及演算法、勵磁系統參數整定和電力系統小擾動穩定性分析為研究內容，主要做了以下工作：建立了以整個預調度計劃周期內的市場購電價格最小為目標的發電市場預調度計劃模型，並根據預調度計劃問題狀態數多、變量多、混合整數、非解析的特點，將預調度計劃模型的目標函數簡化為各時段的市場清算電價最小，設計了三段式預調度演算法：用靜態規劃法求解整個預調度計劃周期內的優化問題；用優先級法求解機組組合問題；用改進的powell法求解最優潮流問題。
  16. The approximate computation method is used in float point computation of system ' s control algorithms after comparing several methods in respect of running time and program space involved, which attains quick computation besides high precision and implements excitation voltage with low harmonic and high control precision of frequency

    通過從運行時間和佔用空間等方面比較實現浮點數運算的幾種方法，並選擇了近似計演算法作為系統控制演算法浮點數運算的方法，在保證足夠計算精度的前提下達到計算的快速性，實現低諧波和頻率控制精度高的勵磁電壓。
  17. Thus the b ( e2 ) value of the first excitation state of 64cu has been directly measured for the first time with this method using 64cu rnb in this work

    因此利用原子能院101 『重水反應堆，首次用低能庫侖激發實驗方法對『 tll第一激發態b田）值進行直接測量。
  18. In this paper periodically perturbed hopf bifurcation to lienard equation with limited time delay is sdudied in detail. that is, the influence of small periodic perturbations on system exhibiting hopf bifurcation is sdudied. in particular, the excitation frequency and the critical natural frequency of hopf bifurcation in the cases of harmonic resonance. subharmonic resonance, ultraharmonic resonance, and ultrasubharmonic resonance is discussed. it is shown that in some parameter regions the sestyms exhibit harmonic solution bifurcation, subharmonic solution bifurcation, ultraharmonic solution bifurcation, ultrasubharmonic solution bifurcation and quasi - periodic solution

    本文詳細研究了具有限時滯li nard方程的周期擾動hopf分支，即在該系統經歷hopf分支時，研究小周期擾動對系統的影響，特別是討論了擾動頻率與hopf分支周期解的固有頻率在共振、次調和共振、超調和共振、超次調和共振的情形。
  19. The calculation of the reaction time for the high initial response excitation system

    高起始響應勵磁系統電壓響應時間的計算
  20. Effects of time delayed velocity feedbacks on self - sustained oscillator with excitation

    時滯速度反饋對強迫自持系統動力學行為的影響
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