磁時變 的英文怎麼說

中文拼音 [císhíbiàn]
磁時變 英文
magnetic temporal variation
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  1. Kelso s. p., henderson b. k. precision controlled actuation and vibration isolation utilizing magnetorheological ( mr ) fluid technology, aiaa 2001

    關新春，歐進萍.磁流變減振驅動器的響應時間試驗與分析.地震工程與工程振動， 2002 ， 22 （ 6 ）
  2. As a result, the electromagnetic field intensity is changed accordingly and fluctuating current in the damper coil is created. damping force is mostly produced because of the phase difference between fluctuating current and displacement of rotor. the formulas of fluctuating current and damping coefficient are deduced theoretically, and the calculated results are consistent with the experimental results

    通過分析發現電磁阻尼器線圈內由於轉子渦動時變化的磁場而產生的波動電流與轉子位移間的相位差是產生阻尼的主要原因，推導了波動電流、阻尼系數的計算公式，並通過實驗展示了被動式電磁阻尼器的阻尼效應。
  3. Keeping the self - adjusting of damping behavior when the controllability of semi - active damping is disable, or saving the unnecessary energy when the continuous modulation of damping is not needed, the composite structure for self - shifting between passive and semi - active structure is presented

    摘要當磁流變減振器半主動功能失效時，為保持其阻尼性能仍具一定的自調節性或實際路況不需無級調節時，節省不必要的能耗，提出用於車輛半主動懸掛系統的被動與半主動功能自動切換的復合結構磁流變減振器。
  4. Moreover, the block time - recursive 2 - d rdgt algorithms and their unified parallel lattice structure implementation are extended from 1 - d rdgt case. three applications of the rdgts are investigated : gabor representation for transient signals via the rdgts, mnr fid signal enhancement via the oversampled gabor transforms, representation and approximation of time - varying systems via the rdgts. the experimental results show the efficiency and advantages of the rdgts in applications

    研究了基於實值離散gabor變換的瞬變信號表示演算法、基於過抽樣實值離散gabor變換的核磁共振fid信號增強演算法以及基於實值離散gabor變換的線性時變系統表示與逼近方法，實驗結果驗證了實值離散gabor變換在應用方面的優越性和有效性。
  5. In theoretical analysis, the motion of radially - emitted electron beam in diode region and drift region has been analyzed, and the relation between radial momentum or current of electron beam and the guiding magnetic field has also been studied, then the possibility to optimize the guiding magnetic field has been derived. the motion of radially - emitted beam electrons in smooth bore magnetron and smooth bore milo has also been studied theoretically. at last, the motion of radially - emitted beam electrons in compound axial and azimuthal magnetic field has been studied

    在理論分析中，初步分析了軸向發射條件下電子在二極體區域和漂移區的運動規律，電子徑向動量隨著外加磁場變化的規律，以及電子束電流隨著外加磁場的變化規律，還有二極體區域磁場優化的可能性;分別研究了有軸向磁場時以及有角向磁場時徑向發射的電子在光滑陽極結構中的運動規律，最後分析了在軸向和角向復合磁場中電子的運動規律。
  6. In 1990s, a calculation of the ground - state energy of an exciton confined in a cylindrical quantum wire in the presence of a uniform magnetic field is reported as a function of wire radius, using a variational approach by gang li, spiros v. branis and k. k. bajaj. a. balandin and s. bandyopadhya present variational calculations of the ground - state exciton binding energy and exciton radius in a quantum wire subjected to an external magnetic field. these studies have been primarily responsible for our current understanding of the nature of excitonic states in a quantum wire subjected to an external magnetic field

    九十年代中期，人們就開始了關于在外加磁場時量子線中激子特性的研究， gangli ， spirosv . branis和k . k . bajaj利用變分法，對于圓柱形的量子線中激子的基態束縛能進行了計算，發現對於一個給定的磁場值，激子的基態束縛能比不加磁場時變大。
  7. The poynting vector that represent the flow of electromagnetic power density on a sphere from a linear dipole antenna is approximated by the summation of the field of segmented line current as hertz dipoles

    以赫芝偶極之電磁場合成任意長度偶極天線在球面上電磁功率密度流之時變玻因亭向量。
  8. The predigested calculating model about lunar soft - landing damping system is established in the course of landing shock. the dynamic computer simulation model is established according to the structure parameters

    建立了磁流變阻尼器緩沖系統沖擊時的簡化模型，利用本文建立的動力學方程和所用阻尼器結構參數構建了動態模擬模型，並進行了計算機模擬。
  9. In time periods shorter than a century, the most striking influences caused by the sun are associated with its magnetic activities such as flares and prominence

    在一個世紀或以內的短時間內，太陽對地球的影響主要來自耀斑和日珥等太陽活動所造成的磁場變化。
  10. Induced current electrical impedance tomography ( iceit ) is a new branch of electrical impedance tomography ( hit ). it applies several excitation coils on the boundary of the object. when one of the coils is stimulated by constant alternating current, the magnetic field is established

    感應電流電阻抗斷層成像（ inducedcurrentelectricalimpedancetomography ， iceit ）是電阻抗斷層成像技術的一個分支，它在被測目標的外圍放置若干個激勵線圈，對其施加時變電流，在空間產生交變磁場，從而在被測目標內激勵出感應電流。
  11. In this paper, the major aim is that studying determination of control current, time - delay and simple simulation. the following work is done : 1

    本課題以解決磁流變阻尼結構的瞬時電流選擇問題、時間滯后問題，及簡化模擬分析為研究目的，主要完成了如下工作： 1
  12. The dynamic character of the rotor system is the same as that without magnetic field when the magnetic field frequency is over a critical frequency, and the sinusoidal magnetic field cannot control the dynamic performance of the disk type mr fluid damper

    當磁場的頻率高於一個臨界頻率后，轉子系統的動力特性與無磁場時的動力特性相同，正弦磁場不能夠控制磁流變流體阻尼器的動力特性。
  13. Secondly, to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing. the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator. thirdly, it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow. the author constructed reliable and integrated experimental system and did a series of experimental study including no - load, cutting - in network and power generation at, below and above the synchronous speed

    論文首先分析了風機運行特性及其最佳風能利用原理，通過模擬及實驗驗證了採用直流電機的輸出特性模擬風力機的最大輸出功率曲線的可行性，並給出了模擬系統的硬體結構；然後為了實現交流勵磁發電機有功、無功功率獨立調節機理，分析了交流勵磁雙饋發電機的數學模型和在追蹤最大風能捕獲變速恆頻風力發電時必需的定子磁鏈定向矢量控制策略；針對雙饋發電機轉子能量雙向流動的要求，提出並設計了具有能量雙向流動能力的雙pwm交流勵磁用變頻器；最後為實現從理論到實踐的全面研究，研製出了一套小功率完整的雙pwm變頻器交流勵磁的雙饋風力發電機實驗系統，進行了空載、並網、同步速及上、下的發電運行等一系列的運行實驗；所完成的模擬和實驗研究均驗證了理論、模型和控制策略的正確性、可行性。
  14. 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。
  15. The 3 - d vector and pattern of electromagnetic field and power density on a sphere from an array of time harmonic current

    弦變線電流陣列在球面上電磁場及功率密度流之時變向量與三維場形。
  16. In this dissertation, the principle of fem in em was discussed, then the pulse radar and three - layered pavements were analyzed with 20 - noded and 4 - noded isoparametric elements respectively. then, corresponding fem programs are compiled in fortran90. so a forward model was built up to describe the transmitting of electromagnetic in the radar and pavements, according to the system identification method

    針對上述情況，本文系統闡述了電磁場有限單元法的基本原理，然後採用二十節點、四節點等參單元分別對pulse雷達實體及三層路面系統進行了靜態場和時變場的有限元分析，初步建立了電磁波在三層路面中傳播的正演模型，同實測波形相比，模擬效果較好，並用fortran90語言編制了相應的三維、二維有限元程序，具有較好的可讀性和可移植性。
  17. After the discussion of the numerical simulation method based on the fdtd method and the pml technique, the motions of the charges and the electrical field lines were first employed to describe the radiation procedures of the pulse electromagnetic waves. then the causes of how the charges are accelerated and how the motion status of the charges are maintained were further studied from the angle of interaction of charge and field. after these analyses, it was pointed out that the pulse radiation is due to the suddenly occurred time - varying electrical field ( displacement current ) in the open space. this view was further evidenced by two examples : one is the partly resistance loaded antenna, the other is the partly curved antenna. the radiation procedures of the pulse electromagnetic waves of many different situations were simulated throughout this paper with the contours and waveforms of electric field given. these figures are very helpful to the understanding of the radiation mechanism of the pulse electromagnetic waves

    在討論了基於時域有限差分法和完全匹配層技術的數值模擬方法之後，首先從運動電荷和電力線的角度直觀地描述了脈沖電磁波的輻射過程，然後進一步從場與電荷相互作用的角度分析了天線上電荷是如何被加速以及如何維持其運動狀態的，指出了開放空間中突然出現的時變電場（位移電流）是脈沖電磁波輻射的根本原因.文中還對局部電阻加載的天線和局部彎曲的天線進行了研究，以進一步說明上述觀點.對多種情況下的脈沖輻射過程進行了數值模擬，並給出了電場的等高線和空間波形圖，這些圖形對理解脈沖電磁波的輻射機理非常有益
  18. Thus, more and more experts at home and abroad study on this aspect, and acquire many achievements. but there are many problems about choosing of control current of mr dampers and time - delay existing in mr structure, which require be solving and completing

    因此，國內外已有越來越多的專家學者投入到此方面的研究，並已取得了一些成果，但在磁流變阻尼器控制電流的精確選擇及磁流變阻尼結構控制的時滯等方面仍存在許多問題，有待進一步解決完善。
  19. Consequently, the suspension with mr damper not only increases ride comfort, but also guarantees the controlling stability of vehicle

    因此，基於磁流變阻尼器的半主動懸架在改善行駛平順性的同時，能夠保證車輛的操縱穩定性。
  20. Survey of basic electromagnetic phenomena : electrostatics, magnetostatics, electromagnetic properties of matter. time - dependent electromagnetic fields and maxwell ' s equations. electromagnetic waves, emission, absorption, and scattering of radiation. relativistic electrodynamics and mechanics

    簡單介紹電磁學的基本現象：包含靜電學、靜磁學、物質的電磁特性。時變電磁場與馬克思威爾方程式、電磁波、電磁輻射特性（發射，吸收及散射） 。相對電動力學與動力學。
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