電矢 的英文怎麼說
中文拼音 [diànshǐ]
電矢
英文
electric vector-
A svpwm control algorism for three - level inverter and its simulation
三電平逆變器空間電壓矢量控制演算法模擬研究Vector scan electron beam system
矢量掃描電子束裝置The direction of the electric field vector is indicated in each picture.
每張照片上都標出了電場矢量的方向。This dissertation is the result of the research and development of a speed - sonserless field - oriented controller ( foc ) system of induction motor
本論文的研究目標是感應電機無速度傳感器矢量控制系統的實現。Firstly, in spherical coordinate system, the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived, using reciprocity theorem and transforming relations between special functions. then, selecting appropriate coordinate system, using superposition principle, the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained. finally, by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1, the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located
首先利用特殊函數間的轉化關系和互易定理推導得到了無限大導體空間中球坐標下時諧電流元電磁場的二階矢量位形式：然後利用疊加原理，選擇合適坐標系，求解了導體球中時諧電流元的修正磁矢量位邊值問題，得到了問題的解析解；最後依據不同坐標系下電磁場解的轉化原理，藉助勒讓德多項式和n次1階球諧函數的加法公式，將坐標系特殊安放時的電磁場解析解變換到坐標系一般安放時的解析解，給出了球內電場和球外磁場的並矢格林函數。The addition formula of spherical harmonics function of degree n and order 1 is derived using the relations between coordinate varieties after coordinate rotating and the property of the associated legendre polynomial. the relations among the magnetic vector potential, the modified magnetic vector potential and the second - order vector potential ( sovp ) are shown going forward one by one. it is explained that the solutions of electromagnetic fields in different coordinate systems can be transformed and an example having analytical solution is given
利用坐標旋轉后球坐標變量間的關系和連帶勒讓德多項式的性質推導得到了n次1階球諧函數的加法公式；以遞進的方式說明磁矢量位、修正磁矢量位與二階矢量位的關系，寫出了引入二階矢量位的過程；以時諧場矢量邊值問題為例，闡明了不同坐標系下電磁場解的相互轉化原理，給出了一個解析解的轉化例子；在球坐標下，引入了較球矢量波函數更普遍的兩類矢量函數，給出了其在球面上的正交關系。Direct current loop vector control system in induction motor
異步電機直流環矢量控制系統4. adopt vector frequency converter motor for traction transmission, which can be controlled with invariable line speed
4牽引傳動採用矢量變頻電機，實現恆定線速度控制。Vector scan electron beam lithography
矢量掃描電子束光刻In the electronic component drawing system, i use " vectorgraph " to magnify and minify the diagram without any distortion
電路板元器件繪制系統採用「矢量圖」的方法實現了不失真的圖形放大和縮小。Then, we caculate the dynamic character of the reflective mtn cell with the optimized parameter, give out the distribution of velocity, twist angle and tilt angle at the midle of the mtn cell when switch on or off in consideration of the backflow
並針對選定參數的mtn液晶盒作了動力學上的計算。文中分別了給出mtn盒在加電壓和撤電壓時，引流效應對反射率的影響，並比較指向矢，速度，中間層的傾斜角等參量分佈的情況。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。When the end of the electric field vector travels in an ellipse, the light is elliptically polarized.
電場矢量的末端沿一橢圓移動的光叫橢圓偏振光。The algorithm of svpwm that is adopted by the system implements motor speed - regulation by control of magnitude and phase of motor flux. it can generate less harmonics in the output current of power inverter and less losses of ac motor, reduce pulsant component in output torque and raise availability of dc supply voltage
系統採用的svpwm演算法通過對空間磁鏈矢量幅值和相位的控制來調節電機轉速，減少了逆變器輸出電流的諧波，降低了脈動轉矩，提高了電壓的利用率。Radar echoes include echoes of lands, islands, all kinds of moving targets, racon, sart and sea, etc. arpa marks consist of fixed range marker, variable range marker, electronic bearing line, guard zone, heading - line, parallel index ( 4 navigation lines ), vector lines ( or pad ) and past track information of tracked target ships, marks of trial manoeuvres, ect
雷達回波包括陸地、島嶼回波，各種活動目標的回波，雷康、 sart回波，海雜波等。 arpa符號包括包括固定距標圈、活動距標圈、電子方位線、警戒圈、船首線、 pi線、已錄取目標的矢量線以及歷史航跡（或pad ） 、試操船符號等。Just two weeks and two credits shy of graduating, pitt crammed all of his earthly belongings in the rattletrap datsun he called " runaround sue, " and headed out to hollywood to become a movie star
就在畢業前的兩周，皮特留下未修完的兩個學分，將他的所有家當打包塞進那輛被他稱為「不倫的蘇」的破舊達特桑汽車，向好萊塢駛去，矢志做一名電影明星。Based on the tms320f240 controller produced by ti company, the hardware and software designation of the symmetrical voltage space - vector pwm is presented. designed a digital controller with tms320f240 to modulate the speed of the motor, in which the keyboard and led display are bedded. it can be to set the frequency of motor and display the run frequency of motor in real time
基於ti公司的tms320f240控制晶元，介紹了對稱空間電壓矢量硬體設計和軟體設計，採用tms320f240設計了一款用於電機變頻調速的數字控制器，該控制器上設計有鍵盤和led顯示，可以設定和動態顯示電機運行頻率。Electrifification : the control and generation of electrical current, from powering an electrical device with one ' s own pyros to throwing deadly bolts of lightning
電術：控制和生成電流之法，如用角色自身的聖火驅動電力裝置，或投擲致命的電矢等。Electrification : a class of transmutations. the control and generation of electrical current, from powering an electrical device with one ' s own pyros to throwing deadly bolts of lightning
電術：嬗變術的一類。可控制或生成電流，如用角色自身的聖火驅動電力裝置，或投擲致命的電矢等。Polarization state of linear polarized light at an angle of incidence
線偏振光電矢量與入射面有夾角入射時的偏振態分享友人