時間域電磁法 的英文怎麼說

中文拼音 [shíjiānyùdiàncífǎ]
時間域電磁法 英文
time-domain electromagnetic method
  • 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...
  • 間 : 間Ⅰ名詞1 （中間） between; among 2 （一定的空間或時間里） with a definite time or space 3 （一間...
  • 域 : 名詞（在一定疆界內的地方; 疆域） land within certain boundaries; territory; region
  • 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...
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  • 電磁 : [電學] [物理學] electromagnetism電磁安（培） abampere （電磁系電流單位）; 電磁泵 electromagnetic ...
  1. Being a method of time - domain electrical magnetic surveying, the transient electromagnetic method ( tem ) can transmit first pulse electromagnetic field to underground making use of loop or electrical source and receive secondary induction field during of the pulse intermission

    瞬變電磁法是一種時間域電磁測量方法，是利用不接地回線或接地線源向地下發送一次脈沖磁場，在一次脈沖磁場的間歇期間，採用不接地線圈接收感應二次磁場。
  2. 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。
  3. The relative exploration methods include : tem, csamt, seismic prospecting for metal deposits, geophysical prospecting in well, deep penetrating geochemical exploration, high resolution magnetic, and high resolution gravitational exploration

    相關的找礦技術包括時間域瞬變電磁法（ tem ） 、可控源音頻大地電磁法（ csamt ） 、金屬礦地震方法、井中物探方法、深穿透地球化學方法、高精度磁法、高精度重力等。
  4. Because of the large advantage in the analysis of electromagnetic scattering and radiation problem, using the time domain integral equation ( tdie ) solving every structure of objects ’ scattering become to an important direction in computation electromagnetics, but the classical mot ( marching - on - in - time ) - based tdie solvers have a drawback : the late time stability problems

    由於時域積分方程對于分析電磁散射、輻射問題有著無可比擬的優勢，利用時域積分方程求解各種結構體目標散射成為計算電磁學領域中一個非常重要的方向。但是傳統的時間步進法求解時域積分方程存在致命缺點:后時穩定性不好。
  5. Application of tem in geological exploration

    時間域瞬變電磁法在地質勘查中的應用
  6. As the 3d electromagnetic field calculation region of the tfpm is not suitable for the periodic condition, the calculation must be done for the whole region. it takes too much time. firstly, a method is adopted to simplify the 3d model with periodic condition

    本文的工作主要包括以下幾部分內容:首先對本文研究的橫向磁通電機的三維電磁場分析模型進行了簡化，提出了對不符合周期條件的求解區域在工程設計允許的范圍內進行簡化處理的方法，同時對商業軟體進行了二次開發，編制了周期條件處理程序，減少了三維電磁場計算時間。
  7. At the same time, it detailed demonstrate and carry out the way, which apply housing electric spindles at generation state to carry out housing toque loading in the joint testing and indirectly estimation housing torque loading by the electromagnetism torque of inner tube electric spindles. thus, the technical problem that the high speed shafting torque loading device and torque sender are difficult to ins tall is solved. and it saves a set of expensive high speed shafting torque loading and measuring device

    同時，詳細論證並實施了採用外套電主軸工作在發電狀態實現接合試驗的外套扭矩加載和通過內套電主軸的電磁轉矩來間接估算外套加載扭矩的方法，從而解決了高速軸系扭矩加載裝置和扭矩傳感器不宜安裝的技術難題，並且節省了一套昂貴的高速軸系扭矩加載和檢測裝置，該成果填補了國內高速單向軸承試驗臺扭矩加載領域的空白，達到了國內領先水平。
  8. 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
  9. Standard guide for use of the time domain electromagnetic method for subsurface investigation

    次表面探查用時間域電磁法的使用標準指南
  10. A coherent electromagnetic pulse in the range between the far - infrared and microwave region is used as a detection source. the amplitude of the wave is recorded by electro - optical or photoconductive sampling. after fast fourier transform, the amplitude and phase of the wave is given, then the complex refractive index standing for the absorption and dispersion of the material in thz region is extracted

    Thz （ 10 ~ （ 12 ） hz ）時域光譜技術是20世紀90年代發展起來的一種新型的光譜測量技術，它使用頻率介於遠紅外和微波之間的相干電磁輻射脈沖作為探測源，利用電光取樣或光電導取樣的方法直接記錄thz輻射電場的振幅時間波形，通過傅立葉變換得到測量信號振幅和相位的光譜分佈，進而獲得材料在thz波段的復介電常數，即色散及吸收等信息。
  11. 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。
  12. It uses the encouragement of step wave or other impulse current field source to produce the transition process field in earth. in the moment of shutting the power it produce the volute alternating electromagnetic field. from the abnormity of measuring the attenuation character of the second induction electromagnetic field, which produced by underground medium with time change, the conductive capacity and the position of the underground non - homogeneous substance can be analyzed

    瞬變電磁法（ transientelectromagneticmethod ）是一種時間域的電磁勘探方法，利用階躍波或其它脈沖電流場源激勵，在大地產生過渡過程場，斷電瞬間在大地中形成渦旋交變電磁場，測量這種由地下介質產生的二次感應電磁場隨時間變化的衰減特性，從測量得到的異常分析出地下不均勻體的導電性能和位置，從而達到解決地質問題的目的。
  13. Beginning with the equivalence principal, two types of near - field to far - field ( nfff ) transformation s are discussed systematically, i. e. frequency - domain nfff ( fd - nfff ) and time - domain nfff ( td - nfff ). in td - nfff transformation, the concurrent - processing approach is used, where the contributions to far - field from the tangential electric current and magnetic current on the equivalence surface are calculated " on - the - fly " in step with the fdtd simulation. as a result, it is not necessary to store the tangential current components for every equivalence surface at every time step, and therefore reduce considerably computer storage required for the td - nfff transformation

    在理論部分，本文從電磁場的等效原理出發，系統、詳盡地論述了頻域和時域近遠場變換的基本思想，在時域近遠場變換中採用實時的變換方法，即每進行一個時間步的迭代，就計算一次等效面上該時間步的切向電流和切向磁流對遠場各方向的貢獻，這樣就使時域近遠場變換不需要儲存等效面上每一個時間步的切向電流和切向磁流，大大減小由於近遠場變換而增加的計算機內存需要量。
  14. With the application of the periodic boundary condition ( pbc ), the computing domain can be restricted to a single period, which greatly improve the computing efficiency and accuracy

    本文通過採用時域有限差分演算法（ fdtd ） ，利用周期電磁結構中場所滿足的周期性，引入周期邊界條件，將計算空間限制在一個周期內。
  15. First, the difference equation, numerical stability condition, boundary condition, power sources settings and some improved speedup techniques of the finite - difference time - domain yee computational method were introduced briefly in which with the multi - time step method and the frequency - dependent finite - difference time - domain ( ( fd ) 2td ) method emphasized

    首先，本文簡單介紹了建立電磁模型中所需採用的時域有限差分yee演算法的差分方程、穩定性條件、邊界條件、激勵波源設置等的基本原理和一些用於加速fdtd演算法的改進方法。其中，詳述了多時間步長（ mts ）方法和頻率相關時域有限差分（ （ fd ） ~ 2td ）方法。
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