系統阻抗比 的英文怎麼說

中文拼音 [xìtǒngzǔkàngbǐ]
系統阻抗比 英文
system impedance ratio
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 阻 : 動詞（阻擋; 阻礙） block; hinder; impede; obstruct
  • 抗 : Ⅰ動詞1 （抵抗; 抵擋） resist; combat; fight 2 （拒絕; 抗拒） refuse; defy 3 （對等） contend with...
  • 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...
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  • 阻抗 : [電學] impedance
  1. The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed

    較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。
  2. This paper researches and analyses the developments of web technology and magnetostrictive transducers from world wide region. the paper also analyes the characteristics curve of magnetostrictive transducers based on its equivalent circuit and researches the method how to make sure its syntony frequency and its electric simulation network parameters. at the same time, by using jsp technology, a magnetostrictive transducer electric simulation application is designed based on b / s three - tier system structure. the experiment data is fitted by curve fitting module. the equivalent input impedance of it with stimulate loop is separated based on the results of curve fitting and the syntony frequency and electric simulation network parameters of magnetostrictive transducers is determined by the input impedance. the method presented in this paper can determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers with a better accuracy than the testing method of syntony & anti - synton y. further more, jsp, the advanced technology at current, has been used to realize a magnetostrictive transducer web electric simulation system. the system has good human computer interface and the function of resource sharing and information publishing. the research of this paper and its achievements have some practical merits in the researchful and applied fields of magnetostrictive transducer

    用java編程語言編寫的曲線擬合模塊，對輸入的實驗數據進行了最小二乘法的曲線擬合；根據曲線擬合結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時由機械振動形成的等效輸入阻抗，並由此輸入阻抗確定磁致伸縮換能器的諧振頻率及電氣模擬網路參數。本課題提出的方法與傳統的諧振?反諧振法相比，能更準確地確定磁致伸縮換能器的諧振頻率及其電氣網路參數。同時，採用當前比較先進的web技術，實現了基於jsp的磁致伸縮換能器web電氣模擬系統，該系統具有良好的人機界面和資源共享、信息發布功能。
  3. The elements of the reduced - jacobian matrix are functions of some parameters of the system. for example, effective short ratio, power base ratio, coupling impedance and load flow of the system. for single - infeed hvdc system with a parallel ac line, computer simulations using power system analysis software package ( psasp ) were performed

    用一種簡單的方法可以求得降階雅可比矩陣，由於降階雅可比矩陣的元素都是交直流混合系統中一些參數的代數函數，如有效短路比、功率基準比、連接阻抗和系統潮流等，因此，矩陣的特徵值也與這些參數相關。
  4. 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。
  5. For multi - infeed hvdc systems, when the minimum eigenvalue of the system becomes zero, the voltage stability graph can be plotted effective short circuit ratio as function of coupling impedance

    對于多饋入hvdc系統，在最小特徵值為零的情況下，可以根據這種關系作出有效短路比?連接阻抗圖，即電壓穩定圖。
  6. Under windows nt and labview development environment, using the linear fit module, exponential fit module > general polynomial fit module of labview to design a method for fitting the experiment data, the results of curve fitting indicate that the purpose of general polynomial fitting is better than the rest. separating the equivalent input impedance of magnetostrictive transducers without stimulate current from input impedance of it with stimulate loop based on the results of curve fitting, and determining the syntony frequency and electric simulation network parameters of magnetostrictive transducers by this input impedance. finally, with labview network functions, realizing magnetostrictive transducer electric simulation system based on web server and discussing a scheme for this system network by datasocket. the method of this paper can more accurately determine the syntony frequency and electric simulation network parameters of magnetostrictive transducers than the testing method of syntony & anti - syntony. at the same time, discussing virtual instrument measurement system and how to realize magnetostrictive transducer electric simulation network system by labview network functions of network virtual instrument measurement development environment

    在windowsnt系統環境和labview虛擬儀器技術開發平臺下，首次利用labview中的直線擬合模塊、指數擬合模塊以及多項式擬合模塊，設計了一種對實驗所得數據進行曲線擬合的方法，對三種擬合方法進行了比較，曲線擬合結果表明，多項式擬合方法相對于其它兩種擬合方法效果更好；根據曲線擬合的結果可從帶激勵線圈的磁致伸縮換能器的輸入阻抗中分離出磁致伸縮換能器鐵芯在無激勵電流時機械振動形成的等效輸入阻抗，並由此輸入阻抗確定了磁致伸縮換能器的諧振頻率及其電氣模擬網路參數；最後通過labview提供的網路功能，實現了基於web服務器的磁致伸縮換能器電氣模擬虛擬儀器測試系統，並探討了通過datasocket技術實現該系統網路化的方案。
  7. It was difficult to measure the load voltage directly between inner and outer conductor of cable induced by shield current under low flux x ray. this paper introduces a measurement, pouring a current, which was same as cable approximately photocurrent in x ray test, into the shield of cable with a triocoaxial system, and the load voltage was got. finally the measured result of typical cable and comparison with the calculation was given with a special load

    在簡要介紹屏蔽電纜的轉移阻抗和轉移導納耦合的基礎上，描述了利用三同軸系統對雙電纜和等效負載組成的電纜系統進行電流注入，模擬電纜屏蔽層發射電流，測量芯線等效負載感應信號的實驗，給出實驗結果及分析，並對理論結果與實驗進行了比較。
  8. Compared to the single hg2 + treated, se4 + + hg2 + the mixed exposure could restrain the fall of the activity of t ? aoc, sod and gsh ? px, reducing the level of lipid peroxidation, and alleviating membrane damage, represented with the heighten na + - k + - atpase activity and reduced mda concentration, resulting in the increased resistance to hg2 + damage. however, se4 + were incapable of preventing from the damage of hg2 + ultimately, along with the exposure period, regardless of the fact that the obvious enhancement of t - aoc and atpase activity

    混合處理后，與單一汞處理相比， se ~ （ 4 + ）在一定程度上能有效抑制汞脅迫引起的t ? aoc ， sod ， gsh ? px的降低，降低膜脂質過氧化水平，減輕了對膜的硒對汞致劍尾魚抗氧化系統的毒害和生理損傷的拮抗作用損傷，表現為隨一k + / atpase活力升高，而mda含量降低，提高了機體對hg葉毒害的抗性;但隨著染毒時間延長，硒不能最終阻止毒害的加深。
  9. Taking the bending stiffness, cable sag and cable inclination into consideration, the space vibration control of the cables using the visco - elastic dampers in cable - stayed bridges is investigated by joining the center difference method and the state space strategy. both the maximum modal damping ration and the optimal damper size are obtained, then the practical suggestions are proposed for the design of the dampers. the space nonlinear vibration equations of the cable - damper system are derived, and a new hybrid method for solving the cable - damper system is presented by combing the newmark method and pseudo - force technology

    綜合考慮了拉索抗彎剛度、垂度的影響，研究了粘彈性阻尼器對斜拉橋拉索的空間振動控制，聯合中心差分方法及狀態空間法，得出了拉索麵內、外振動各階模態可能達到的最大阻尼比及相應的最優阻尼器系數，並對斜拉橋拉索的阻尼器設計提出了參考建議：考慮拉索抗彎剛度、垂度及幾何非線性，導出了索-阻尼器系統的空間振動非線性方程組，結合newmark方法及偽力（ pseudo - force ）方法，創新地提出了求解非線性方程組的雜交方法，根據拉索-阻尼器系統的阻尼特性，在各種荷載作用下，對索-阻尼器系統的非線性瞬態振動響應進行了研究，從系統響應的角度更加直接地驗證了阻尼器的控制效果。
  10. We analyzed the anti - jam and band inside anti - interfere performance of the system, and the low probability intercept ( lpi ) of the traditional direct sequence spread spectrum ( dsss ) modulations in the uav platform ' s applications. so a new modulation technique using a multi - level pseudo noise ( pn ) code has been presented. the new multi - level pn code is built from a high speed pn code through a low passed filter ( lpf )

    分析了系統抗阻塞式干擾和抗帶內頻帶干擾的性能，以及常規bpsk qpsk - dsss調制在無人機通信中存在的安全隱患，提出了一種用多電平pn碼進行擴頻調制的方法：採用高速pn碼，經過低通濾波器，產生多電平pn碼進行直序擴頻調制，能在低信噪比情況下有效抵抗平方率檢測器對系統載波的檢測。
  11. In this paper the shortcomings of the constant impedance control method has been analyzed, in accordance with efa system " s characteristics, requests of design and developing direction of efa control system an intelligent control method has been proposed. based neural network the model of the efa is established, which can pre - estimate the echo of control variable of efa. by analyzing the result of pre - estimate the control variable can then be adjusted in real time

    本文分析了電弧爐恆阻抗控制存在的不足，在此基礎上針對系統的特點和控制要求，參考國內外電弧爐控制的研究發展方向，提出了一種基於神經網路的電弧爐控制方法，即利用神經網路建立電弧爐模型，並對系統的響應進行預估，將對預估值和期望值進行比較計算並對實際控制量進行校正。
  12. Part 1 : a brief account of the crime obstructeclin this part, the author compared the appellations of the acts such as legal defense and so on, and put forward a new terms : the crime obstructed. this terms has merit as follows : in the first place, it is named in the point of view of the constitution of crime, so we can avert the abuse that people named them in the angle of criminal attribute, but studied them not in the part of criminal attribute ; secondly, it can integrate the fortuious event, the force majesture, the severe damages of people who has criminal incapacity that in traditional theories are studied in the interior of the constitution of crimes and the acts such as legal defence, etc., because they have a common ground : not to accord with the constitution of crimes. thirdly, it is accurate and lucid terms. besides appellation, the author discussed the concept and feature of the crime obstructed in this part

    該部分詳細比較了我國學者對以正當防衛為代表的一系列行為的稱謂，提出了「犯罪阻卻事由」這個新術語。並認為使用這一術語有如下優點：一是從犯罪構成的角度來命名，避免了其他術語從犯罪屬性的角度命名但又不在犯罪屬性這部分來研究的弊端；二是它能將傳統理論放在犯罪構成內部研究的意外事件、不可抗力與無刑事責任能力人的嚴重損害行為與正當防衛等統一起來，因為它們有一個共同點：不符合犯罪構成；三是這個術語準確而又簡潔。除稱謂外，這部分還研究了犯罪阻卻事由的概念與特徵。
  13. According to zero sequence voltage distribution from system zero sequence impedance to shunt reactor zero sequence in zero sequence circuit, the zero sequence voltage at the terminal of shunt reactor and the zero sequence compensating voltage at neutral are compared in the scheme

    即根據零序網路中零序電壓在系統零序阻抗和電抗器零序阻抗上的分佈情況，通過直接比較電抗器首端零序電壓與補償到電抗器末端中性點的零序補償電壓的幅值大小，來判別電抗器匝間故障。
  14. Abstract : a microprocessor - based adaptive voltage instantaneous trip protection is proposed and analysed. the voltage setting can be automatically online calculated and determined according to current operation condition of power system and the protection zone is enlarged. as a result, the adaptive voltage instantaneous trip protection is more superior than the same conventional ones

    文摘:為了克服傳統電壓速斷保護的動作性能受運行方式變化影響的缺點，提出了利用在線實時計算系統電源側綜合阻抗的方法實現微機式自適應電壓速斷保護，分析結果表明它比傳統的電壓速斷保護有著非常明顯的優越性。
  15. Through the monitoring on the frequency performance and square - wave response performance of manganese - zinc ferrite coil with different sizes., different ratios of winding and different matching impedances, the result shows that manganese - zinc ferrite coil with proper ratio of winding and matching impedance can effectively restrain the interference and damage which the over - voltage and large - current signals of the power system do to the on - line monitoring system

    通過對不同尺寸、不同匝數比和不同匹配阻抗下的錳鋅鐵氧體線圈的頻帶性能、方波響應性能測試實驗，結果表明：適當匝數比和匹配阻抗的錳鋅鐵氧體線圈可以有效地抑制系統過電壓和大電流信號對在線監測系統干擾和破壞。
  16. The dynamic predigesting model for passive isolation of flexible base system was established, and the four - pole parameters and machinery impedance methods were adopted to analyse the system, the expression of the responsibility and power flow transmissibility was deduced. by means of the matlab programming language, the responsibility and power flow transmissibility were simulated. proposed the vibration contrl method of optimizing system parameters. the methods proposed in this dissertation, can meet the requirement of decreasing vibration and noise for flexible base, and have some practicability and reference value

    對柔性基礎被動隔振系統進行了力學建模簡化，並採用四端參數和機械阻抗方法對其進行分析，推導出其響應比和功率流傳遞率的表達式，並利用matlab程序設計語言對響應比和功率流傳遞率進行了模擬模擬。提出了以優化系統參數為措施的振動控制方法。本文所提出的方法，能夠滿足柔性基礎減振降噪的要求，具有一定的實用性和參考價值。
  17. Comparison of several lumped - parameter models to simulate the input impedance in systemic circulation

    心血管系統體循環輸入阻抗的幾種集中參數模型的比較和應用
  18. For fire grounding, grounded impedance varies greatly because of air dissociation, and this causes protection set to startup and resume again and again. therefore, the main protection of the fault line ca n ' t cut off the fault quickly and accurately, and may lead to overstep tripping of near lines " protection sets and eventually cause more serious faults on the power system

    同時故障電流一般比較小，電流突變也很小，有時呈緩慢上升的變化趨勢，對火焰接地來說，由於空氣游離的緣故，接地阻抗變化很大，使現有保護反反復復啟動、恢復，可能會導致相鄰線路、設備的保護越級跳閘，使電力系統出現更嚴重的故障。
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