磁介電體 的英文怎麼說

中文拼音 [cíjièdiàntǐ]
磁介電體 英文
magneto-dielectrics
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 體 : 體構詞成分。
  1. Standard test method for measuring relative complex permittivity and relative magnetic permeability of solid materials at microwave frequencies

    微波頻率下固體材料相對復介電常數和磁導率測量標準試驗方法
  2. This paper gives a comprehensive description of the development of aerogeophysical techniques in western countries and recounts such instruments as aeromagnetometer and gamma spectrometer, the newest aeromagnetic, aeroelectromagnetic and airborne gravity surveying system as well as data - processing software

    摘要本文綜述了西方國家航空物探技術的發展動態，介紹了最新航空磁力儀、伽馬能譜儀，以及最新航磁、航電、航重測量系統、數據處理軟體。
  3. The research work presented in this dissertation provides an efficient approach to analyze the dielectric objects and metal - nonmetal composite objects ’ transient electromagnetic scattering phenomena, as well as a solid foundation for the further development in this subject

    本文的工作為分析介質體、金屬非金屬組合目標時域電磁散射現象提供了有效的方法途徑，也為運用時域積分方程求解結構更為復雜、尺寸更為電大的金屬非金屬組合目標的研究打下了堅實的基礎。
  4. Due to the importance of the accuracy of the time - domain impedance matrix elements, the techniques by which treating of the singular integrals and near singular integrals arose from the tdie - mom solving process are analyzed in detail, and these techniques are utilized to solve the tdie. in the end, using triangle patches discretizing arbitrarily 3 - d dielectric objects and metal - nonmetal composite objects surface and utilizing spatial rwg and temporal triangular bases, the tdie are solved by mot algorithm

    最後，分別對三維介質目標、金屬非金屬組合目標散射體表面用三角貼片離散，並在空間上採用rwg基函數，在時間上採用三角型時間基函數、利用阻抗元素的精確演算法計算出阻抗矩陣，再運用mot法分別求解了介質體目標，金屬非金屬組合目標的時域積分方程，並分析了金屬非金屬組合目標分界面上的等效電流與等效磁流的特性。
  5. Based on it the electromagnetic response under different depths of the 3 dimensional geologic body with different resistivities, magnetic conductivities and dielectric constants is simulated

    據此，可模擬計算任意具有不同電阻率、磁導率和介電常數的三維地質體在不同深度條件下的電磁響應。
  6. For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics

    利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性，建立了半經驗植被雷達後向散射模型; 2 ） .研究發現在農作物等矮小植被覆蓋地表，植被層直接後向散射與植被類型相關，且在植被生長期，雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ） .解決了單參數雷達地表土壤水分反演問題中，雷達入射角和地表粗糙度的影響這一難點問題; 4 ） .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ） .在以上成果基礎上，建立了完整的單參數雷達地表土壤水分變化探測反演演算法，經地表驗證，模型反演地表土壤水分變化值的精度為rmse = 0
  7. Cardiogram is made according to the bioelectricity of brain cell on the basis of the principle that changing current produces magnet. thus, the biology magnetic field results from bioelectricity inside human body as well as some material magnetized by the magnetic field inside forming a residual magnetic field after the disappearance of effecting magnetic field, like lung magnetic field

    心電圖是由腦細胞的生物電流形成的，根據電動生磁的原理，故體內的生物磁場是由於體內生物電流形成的，除此之外還由於某些磁場物質的介入體內被磁化后而在外加磁場去掉后，產生的剩餘磁場，如肺磁場。
  8. Secondly, the math model of the high - speed pm generator with a shielding is deduced. the method of how to analyze the electromagnetic field of the generator is introduced. and with the help of a kind of fem software, the parameters of a model machine are calculated and simulated, including the electromagnetic field, no - load voltage, single - side magnetic force, loaded torque and axial force

    其次，對轉子帶防護罩的高速永磁發電機數學模型進行了推導，介紹了利用有限元法對電機磁場進行分析的方法，並運用有限元軟體對一臺樣機的參數進行了模擬，包括電機磁場分析、空載電壓波形、單邊磁拉力、負載轉矩以及軸向力等方面的內容。
  9. Especially, they are characteristic of low price and perfect absorbability, so they can be an important absorbent in radar absorbing materials

    鐵氧體既具有亞鐵磁性又有介電特性，對簡諧微波電磁場來說，其相對磁導率和相對介電系數均呈現復數形式。
  10. From physical principle, the electric property differences among oil, gas, and water are analyzed, and it is pointed that the electric properties of their mixture in oil wells are not only determined by their electric parameters, but also related to the mixture flow velocity, concentration and distribution state of each phase, and the measured electromagnetic field

    其次，從物理機理出發，對油、氣與水的介電特性和導電特性差異進行分析，指出油井內混合流體的電性質不僅與各相流體的電性參數有關，而且與流體的流動速度、各相含量、分佈狀態以及測量電磁場有關。
  11. A general solution of the thermodynamic energy of systems of gas, magnetic dielectric, dielectric, and of battery was found by working from thermodynamics first law ' s different forms in different matter systems, by using equation of state and thermal capacity in different thermodynamics system and by solving thermodynamic energy differential equation, thus provide a method of studying other qualities in thermodynamics system

    摘要通過熱力學第一定律在不同物質系統中的不同形式，利用不同熱力學系統相應的物態方程及熱容量，以及通過求解熱力學能微分方程，一般性地求解了氣體系統、磁介質系統、電介質系統、電池系統的熱力學能，為研究其他熱力學系統的特性提供了一種方法。
  12. An anomalies in the dielectric constants and loss tangent have been observed experimentally in the ferroelectromagnet near the antiferromagnetic transition temperature, indicative of a coupling between the ferroelectric and magnetic ordering, but the nature of the mechanism of magnetoelectric coupling and the form of interaction is still an important and debated issue

    而另一類是鐵電磁體，它除了具有一般磁電體的性質外，還由於固有的本徵磁有序和鐵電有序的耦合使之存在自發的磁電效應。實驗上已經發現了由於自發的磁電耦合導致的介電異常和損失正切。
  13. The vector magnetic potential of a system consisting a line electric current and an infinite long magnetic dielectric column is calculated with the method of separation of variables and method of images, it is pionted out that the vector magnetic potential of a system consisting a line electric current and a magnetic dielectric plane, an ideal paramagnetic column, a superconductor column, and a line electric current in homogeneous magnetic field can all be deduced from our calculation

    摘要用鏡象電流法和分離變量法計算了線電流與無限長磁介質圓柱系統的磁矢勢，指出線電流與無限大磁介質分界平面、線電流與超導體圓柱、均勻外磁場中有磁介質圓柱系統時的磁矢勢都可以由線電流與磁介質圓柱系統的磁矢勢的極限情形給出。
  14. In 6. 635, topics covered include : special relativity, electrodynamics of moving media, waves in dispersive media, microstrip integrated circuits, quantum optics, remote sensing, radiative transfer theory, scattering by rough surfaces, effective permittivities, random media, green ' s functions for planarly layered media, integral equations in electromagnetics, method of moments, time domain method of moments, em waves in periodic structures : photonic crystals and negative refraction

    本課程所覆蓋的論題包括：狹義相對論、運動媒質的電動力學、色散媒質中的波、微帶集成電路、量子光學、遙感、輻射傳輸理論、粗糙表面上的散射、有效介電系數、隨機媒質、平面層狀媒質的格林函數、電磁學中的積分方程、矩量法、時域矩量法、周期結構中的電磁波：光子晶體和負折射率。
  15. Test method for permittivity dielectric constant and dissipation factor of solid ceramic dielectrics at frequencies to 10 mhz and temperature to 500 deg c

    頻率10 mhz溫度500固體陶磁介質的漏電率和耗散因子測定方法
  16. What is an active protection, elementary : mike or receiver of the signal - an amplifier, 1 transistor - a capacitor with changeable resistor - an output on speaker or emitter

    頻率范圍超過100千兆赫，採用材料反射體屏蔽，具有高介電常數，導磁性，水或鎂7分水作為遮蓋金字塔，填充物- - -一個吸收器- - -石墨，碳。也可以建造積極保護方式電容器。
  17. With heat treatment temperature increasing, the complex permittivity of w - type ferrite hollow microspheres decreased ; " firstly increased and then decreased, increased and there was an obvious resonance peak ; the complex permittivity ? of m - type ferrite hollow microspheres increased ; " increased, " was basically unchangeable

    隨熱處理溫度的升高， w型鐵氧體空心微球的介電常數降低；磁導率實部先增加后減少，虛部增加並出現明顯的共振峰； m型鐵氧體空心微球的介電常數增加，磁導率實部增加，虛部變化不明顯。
  18. Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent

    本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。
  19. The first part of this thesis includes the following information : ( 1 ) the significance of materials and the progress in every fields of material science in recent years ; ( 2 ) the history of magnetic material and the classification of magnetic material ; ( 3 ) the emergency and the classification of organic magnetic materials as well as the significant progress in the field of ferrocene polymeric magnet recently ; ( 4 ) introducing die development and the status quo of dielectric polymer and discussing the four parameters which are used to characterize the dielectric beheaviour of material, these parameters mclude dielectric constants dielectric loss ^ electric conductivity and breakdown strength

    本文在開頭部分簡單講述了以下內容了： （ 1 ）材料的重要性以及近些年來材料業各個領域的發展； （ 2 ）磁性材料的發展史以及磁性材料的分類； （ 3 ）有機磁性材料的出現、有機磁性材料的分類和近些年來有機金屬磁性材料尤其是二茂鐵高分子磁體領域所取得的重要進展； （ 4 ）高分子介電材料的發展與現狀，對表徵材料介電性能的四個重要參數即介電常數、介電損耗、電導率和擊穿強度做了比較詳盡的論述。
  20. In this paper, we first investigate the impurity effect ( ba2 + ) on the dielectric and phase transition properties in srtio3 within the framework of the transverse - field ising model ( tim ). then a possible coupling mechanism between the magnetism and dielectric properties in eutio3 is discussed and the magnetic influence on the frequency of the soft - phonon mode is investigated via the heisenberg model, soft - mode theory under the mean field approximation, the second quantization theory and the perturbation theory. and we proceed further investigation on eu1 - xbaxtio3 of

    我們發現baxeul _ xtio3 （ o 『 x 『 0 . 2 ）的介電常數和由內察的偏置場導致的電極化除了隨雜質濃度產生相應的變化，同時在磁和介電性質的藕合作用影響下在低溫下偏離通常的量子順電體行為，在尼爾溫度附近出現異常，且磁場通過對最近鄰自旋關聯的作用來影響介電常數和電極化。
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