電磁常數 的英文怎麼說

中文拼音 [diàncíchángshǔ]
電磁常數 英文
electromagnet constant
  • 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
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 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. The refractive index of a substance is determined by two properties known as the electrical permittivity and the magnetic permeability

    物質的折射率由兩項性質決定，分別是介電常數和磁導率。
  2. 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
  3. This paper theoretically analyses the armature current and magnetomotive force in ac exciter of brushless synchronous machine with rotating rectifier. under the normal or fault conditions of rotating rectifier, the mathematical expressions of the armature current, the m. m. f and induced electromotive force are approached

    本文通過對旋轉整流器在正常與故障狀態下的交流勵磁機電樞電流和電樞電勢作了初步的理論分析，推導出旋轉整流器在正常與故障狀態下電樞電流、空間諧波合成磁勢及其感應電勢的數學表達式。
  4. Polarimetric synthetic aperture radar ( polsar ) investigates the transverse vectorial nature of plane em waves and provides the complex scattering matrix of a scatterer. scattering polarimetry is sensitive to the shape, orientation, and dielectric properties of scatters

    極化合成孔徑雷達（ polsar ）研究電磁波的矢量特徵，通過測量和分析目標的極化散射特性，獲取目標的介電常數、物理特性、幾何形狀和取向等方面的大量信息。
  5. Having investigated composites of ep coating ultramicro iron using atpu as surface agent, results showed that with increasing amount of atpu, density, complex permittivity ( ) and complex permeability ( ) of composites decreased, and retentivity and coercivity increased

    用atpu作表面活性劑制備核殼結構復合粒子時，隨著復合時atpu用量的增加，復合粒子的密度、復介電常數（ ）和復磁導率（ ）逐漸減小，剩磁與矯頑力逐漸增大。
  6. This text divides into five chapters altogether : chapter one in the introduction, have introduced the common sensor of displacement, has pointed out the fine characteristic of hall ' s sensor, put forward the basic task ; chapter two have introduced the basic operation principle of hall ' s component ; chapter three introduce hall temperature performance, electromagnetic characteristic, zero error, frequency characteristic and these parameter commonly used compensation method and hall simple application of component ; chapter four having recommended the measurement principle of the feedback servo mechanism, systematic implementation method, the experimental result has appeared, structure the mathematics model, and has analysed the error ; chapter five have pointed out the developing direction in the future while looking forward to

    本文共分為五章：第一章緒論中，介紹了常見的位移傳感器，指出了霍爾傳感器的優良特性，提出了基本任務；第二章介紹了霍爾元件的基本工作原理；第三章介紹了霍爾元件的溫度性能、電磁特性、零位誤差、頻率特性以及這些參數常用的補償方法和霍爾元件的簡單應用；第四章介紹了反饋隨動機構的測量原理，系統的實現方法，給出了實驗結果，構建了數學模型，並對誤差進行了分析；第五章展望中指出了今後的發展方向。
  7. The higher temperature, the more fe ( co ) 5 decomposed in the gaseous phase. when the temperature was raised to 150, the thermolysis entirely happened in gaseous phase and the particles of 2 - 4um formed in long chains. with long chains broken, the plural relative permittivity ( e ", e " ) drop and plural magnetic permeability ( u ", u " ) rise

    恆溫滴加法受溫度影響顯著，隨著溫度的升高，發生在氣相中的熱分解量增加； 150下fe （ co ） _ 5完全在氣相中分解，產物為2 4 m的微粒形成的鏈狀結構，這種鏈狀結構的破壞有利於復介電常數（ 、 ）的降低、復磁導率（ 、 ）的提高。
  8. The paper proceeds from the transient equation for voltage and torque, analyze the electromechanic time constant of permanent - magnet dc servomotors based on the theory, and compare with the several testing methods which are used normal in the engineering, point out the difference and applying area also for the testing error which is led to possibly

    摘要為了準確評價伺服電動機的動態性能指標，從電機的電壓、轉矩平衡方程式出發，在理論上對永磁直流伺服電動機的時間常數進行了分析探討，並對工程實際中常用的幾種測試方法進行分析和比較，指出其差別和適用范圍以及可能造成的測試誤差。
  9. 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。
  10. Monodispersed particles may be synthesized by thermal decomposing iron pentacarbonyl in liquid phase containing lauryl - phosphate mono - ester as the surfactant. with increasing dosage of the surfactant, the grain size of the particles decreases, as a result, the permittivity decreases and the permeability increases. the minimal permittivity and the maximal permeability occur at the diameter of about 39 nm

    以十二烷基磷酸酯為表面活性劑在液相中熱分解五羰基鐵制備了單分散的- fe納米粒子，發現隨表面活性劑用量增迦納米粒子粒徑減小，粒子介電常數下降，磁導率上升；粒子介電常數和磁導率在粒徑為39nm左右分別出現最小值和最大值。
  11. The mathematic model of antenna is used in digital tv system network layout and simulation. the disquisition educes the mathematic model of omnidirectional multilayer tv antenna

    摘要這里利用電磁場理論和計算機輔助分析的方法導出電視工程常用的全向多層振元電視系列天線的數學模型，並應用於地面數字電視的單頻網組網實踐。
  12. It plays a very important role in many application, according to the point of mathematics point, its mostly application originate from equations of mathematical physics, difference equations, markov process, and so on, its purpose is to solve the problems of solid, fluid, electromagnetic, microscopic particles, system control, and etc. in practical science research and engineer applications, such as, architecture project, research of aeronautics and astronautics, bioscience, computing physics and oil reconnoiter, many large scale generalized eigenvalue problems need to be solved

    它在很多應用中扮演非常重要的角色，從數學角度來看，矩陣特徵值問題的應用大多來自數學物理方程、差分方程、 markov過程等。目的是為了計算固體、流體、電磁、微觀粒子、系統控制等重大問題。在實際的科學研究與工程應用中，比如在建築工程、航空航天研究、生物科學、計算物理以及石油勘探中，都要涉及到大規模矩陣廣義特徵值問題的計算。
  13. Chapter 7 introduced the usual interference in the data acquisition system, including same intrinsic noise interference of the devices, some common impedance interference electromagnetism interference and discussed the method to restrain them

    在第7章，介紹了數據採集系統常見的干擾，包括器件固有噪聲干擾、公共阻抗干擾、電磁場干擾、並討論了抑制這些干擾的措施。
  14. The linear permanent magnet synchronous motor ( lpmsm ) has avoided the effects of the mechanical transmission chains from rotary motions to linear ones, and has strong electromagnetism thrust, lower cost, small electrical time constant and rapid response etc., which becomes one of the best executive machines in the high - precision and micro - feed servo system

    由於永磁直線同步電動機消除了旋轉電機由旋轉運動到直線運動的機械傳動鏈的影響，且具有電磁推力強度高、損耗低、電氣時間常數小、響應快等特點，使其在高精度、微進給伺服系統中成為執行機構的最佳選擇之一。
  15. In many fields, such as remote sensing, nuclear medical, computer tomography, geophysical prospecting, groundwater hydrology, global ocean modeling, image processing, tumor detection, nondestructive detection, the objective of applied sciences and engineering is the recovery of the original signal given a collection of noisy observations of the original signal ; we call these problems inverse problem

    在遙感技術、核醫療技術、計算機斷層掃描（ ct ）技術、地質勘探、地下水文學、電磁輻射、圖像恢復和重構、腫瘤檢測、非破壞性檢測等科學研究和工程實踐中，經常需要根據一組觀測到的數據來估計目標的真實信號，而觀測到的數據往往是真實信號經模糊、失真和加噪等過程后所得的輸出信號，通常稱這類問題為逆問題。
  16. The conclusions from this research include : ( 1 ) the real part mainly effects the delay time between two peaks of gpr signal, the larger the real part, the longer the delay time. ( 2 ) the imaginary part mainly affects the peak amplitude of gpr waveform except that from pavement surface, the higher the imaginary part, the lower the peak amplitude. ( 3 ) the neglect of imaginary part of dielectric will increase the analyzing error obviously when it is higher

    分析了路面結構層材料介電常數實部和虛部對雷達電磁波反射信號的影響，並得出以下結論： （ 1 ）介電常數的實部主要影響雷達反射波的時延，實部越大，時延越長； （ 2 ）虛部主要影響除路表反射波幅之外的其它結構層界面的反射波波幅，虛部越大，反射波幅越小； （ 3 ）當介質介電常數虛部較大時，忽略虛部將給分析結果帶來明顯的誤差； 3
  17. This technique is mainly involved two steps : 1 ) vegetation effects correction : we used ndvi ( normalized difference vegetation index ) derived from tm and avhrr measurements for spatial and temporal variations of vegetation covers at different scales

    但由於電磁波與地表相互作用的復雜性，雷達後向散射系數除受地表介電常數（土壤水分）影響外，還受到地表粗糙度、土壤類型、植被覆蓋以及雷達入射角、頻率、極化等多種因素的影響。
  18. More and more high - switch - rate and high - pin - density devices have been applied to the digital system along with the fast development of manufacture technics of integrate circuit ( up to 65nm ), while the supply voltage of electronic system shows itself a fallen trend ( from 5v to 1. 2v ), signal integrity ( si ), power integrity ( pi ) and electromagnetic compatibility ( emc ) problems have become increasingly serious

    具體體現到高速pcb板級設計上，則為信號完整性（ signalintegrity ，簡稱si ） 、電源完整性（ powerintegrity ，簡稱pi ）和電磁兼容性（ electromagneticcompatibility ，簡稱emc ）問題的影響已經達到了不可忽略的地步，經常會出現邏輯功能正確的數字系統不能在物理結構上實現。
  19. The paper analyzes the usual measurement methods in room temperature, and applies transmission / reflection method to design automatic measurement system

    本文首先分析了目前常溫下電磁參數的常用測試方法，選用傳輸/反射法，根據測試原理設計綜合自動測試系統。
  20. Absorbing properties of single layer absorbing materials are determined by complex permittivity, complex permeability, thickness, frequency and so on. the external electromagnetic ( em ) parameters of materials lie on ingredients " content and em parameters

    單層吸波材料的吸波性能主要取決于材料的復介電常數、復磁導率、材料厚度及使用頻率等因素，而該層的宏觀電磁參數又取決于各組分的電磁參數及其含量。
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