無電流場 的英文怎麼說

中文拼音 [wúdiànliúchǎng]
無電流場 英文
current-free field
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 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...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  • 電流 : current; galvanic current; electric current; electricity; current flow電流保護裝置 current protec...
  1. The sensor used unbalanced principle of alternating electric field around feed cable to detect the state of electric field of cable core over the ground, thereby got out the result that the feed state of cable in mine had no relation to the current in the cable

    該傳感器利用饋電電纜周圍交替電場的不平衡原理檢測電纜芯線對地的電場狀態，從而間接檢測出礦井電纜的饋電狀態與電纜是否有電流無關。
  2. 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。
  3. An arbitrary shaped line current on a horizontal plane is divided into many small line segments and approximated by hertzian diploes, then both the near and far em - field of the line curennt is approximated by the summation of the complete near and far fields of hertz dipoles

    水平面上任意形狀線電流分割為許多小段之電流，每一小段之電流近似為赫芝偶極，則在三度空間任意座標平面上無論遠近之電磁場即可以赫芝偶極之遠近完整電磁場加總合成近似之。
  4. For a x - directed line current with lengh much smaller than a wave length, the e - field pattern on coordinate planes in 3 - d space in the region from much smaller than line length to one or two wave length, the synthesized pattern by summation of the field of many line segments of hertz dipoles is independent of the number of segments, i. e. same field as a single hertz dipole

    以水平面上三角形甚小於波長線電流為例，分割為若干小段之赫芝偶極所加總合成在三度空間任意座標平面上距離從甚大於線長到一兩個波長區域之電場場型與分割小段數量無關，即等同於一單一赫芝偶極之場型。
  5. Since the linear or nonlinear electromagnetic field equations can be written as an infinite - dimensional hamiltonian system, whose solution can be viewed as a hamiltonian flow in the phase space which preserves the symplectic structure in the time direction. such important features should not be neglected during the construction of numerical methods for the field equations

    由於線性或非線性的電磁場方程可以轉化成無限維的hamilton系統，其結果可以看作是定義在相空間里的時間上保持辛結構的hamilton流，因而在對場方程構造數值演算法時就不應忽略這樣重要的性質。
  6. Aiming at the study actuality of fan performance monitoring system and analysis of fan performance curve changes affected by inlet - box and the different fixed - angles of guide blades in the course of installation, a fan flow monitoring model based on rbfnn in whole flow zone was established in this thesis. in the model, the method of no throttle and fan performance curve were used as basis. and on the basis of that model, fan performance curves of 4 - 73no. 8d were approached with experimental data of different speed, different opening - angles of guide blade and different resistance of pipeline, the precision and the error law of model were studied

    本文針對電站風機性能監測系統研究較少的現狀，在實驗的基礎上分析了現場加裝進氣箱和由於安裝造成的導流器葉片開度不一致對風機性能曲線的影響，並在此基礎上採用無節流方法測量流量，以風機調節性能曲線為依據，建立了基於徑向基函數（ rbf ）神經網路的風機流量全程監測模型；以實驗室4 - 73no . 8d離心風機為研究對象，探討了rbf神經網路差壓模型在變轉速、變導流器開度和變管網阻力等工況下的應用精度和誤差分佈規律；最後用visualc + +語言開發了風機性能在線監測系統。
  7. In addition, the characteristics of er fluids such as short response time, low power consumption, smoothness of operation and mechanical simplicity, er fluids have been considered for various applications in mechanical engineering for electromechanical couplingdevices such as an engine mount, shock absorber, clutch, er valve, robotics arm and several control system during the past decades, studies on er fluid materials were focused on those of inorganic oxides and organic polymers

    電流變液作為一種新型智能材料，其力學、電學、光學性能可由外加電場連續調控，這一特性使得電流變液在液壓系統、減振裝置、印刷、光學以及機電一體化等領域具有廣闊的應用前景，成為仿生智能科學的首選材料之一。在過去的幾十年間，電流變液材料的制備主要集中在無機氧化物和有機聚合物。
  8. To adjust the handling capacity of the centrifuge by regulating 0 and 1 ， suggestions are put forward as follows : ( 1 ) using dc motor instead of ac motor when scr system being used, ( 2 ) mounting a coupling on the drum shaft, ( 3 ) adding a liquid supply control system to control the filling of the fluid in the coupling

    為此，提出改進建議: （ 1 ）在有scr可控硅系統的現場，用直流電動機代替交流電動機，用控制電流大小的方法來調節電動機的轉速，從而控制0 ， （ 2 ）在滾筒軸上安裝一偶合器，利用偶合器的無級調速的特點來達到自動調節離心機處理速度和處理量的目的， （ 3 ）在安裝偶合器的基礎上，增加一個液體供應控制系統。
  9. This paper, firstly, introduces some basic nondestructive tests, shows the background of the subject about the test for the defect of sucker rod, by comparing with the other nondestructive tests, proves the advantage of eddy - current test, then beginning with maxwell equation in electromagnetic field theory and combining with the idea model of defect, this paper proves that the feasibility of eddy - current test technology in multi - parameter and multi - frequency which applied in the test for for the defect of sucker rod

    本文首先介紹了無損檢測技術的幾種典型方法，並給出了抽油桿裂紋檢測這個課題的背景，通過同其它幾種無損檢測技術的比較，給出了電渦流技術的優越性。然後從電磁場理論中的麥克斯韋方程出發，結合裂紋的理想模型，從理論上證明了電渦流多頻率多參數檢測技術在抽油桿裂紋檢測中的可行性。
  10. This paper describes mainly system functions, measuring methods, circuit design, software program and errors analysis of a new type of measuring instrument. this instrument can measure and monitor electric parameters in single - phase circuits, three - phase ( three - wire or four - wire ) circuits. this system can be applied to electric devices and power plants, transformer substations with harmonic pollution. it can measure current, voltage, power, energy, frequence, power factor etc. it also can detect load quality, phase sequence, alarm, display and print results, as well as detect and dispose negative power

    該儀器適用於含有諧波污染情況下的機電設備現場、發電廠、供電局、企業變電所現場，可用來測量電流、電壓、有功功率、無功功率、視在功率、有功電能、無功電能、視在電能以及頻率和功率因數等電參數，並具有負載性質（感性、容性）判別，正、逆相序判別指示功能；超限報警功能；列印記錄功能和負功檢測及處理功能。
  11. Because the field caused by the eddy - current transducer in the dissertation is not only axially symmetrical, but also plane symmetrical, there is no normal component of the electrical field strength and we cannot apply the condition en = 0 to solve such a problem

    由於本文中的渦流傳感器模型，其電磁場不僅是軸對稱場，而且還是平面對稱場，不含有電場強度的法向分量，所以無法利用邊界條件e _ n = 0來求解。
  12. Compared with traditional oxygen detection methods, there are several advantages using this sensor : no oxygen consumption and reference electrode are needed ; no electronic current is needed and no disturbances happen if there is a magnetic field outside ; the intensity of the phosphorescence has n ' t relation to the stir and flow rate of the sample ; the response is rapid

    與傳統的測氧方法相比，它在測量過程中不消耗氧，不需要參比電極，不用連接電流，不受外界電磁場干擾，與樣品流通速率和攪拌速率無關，響應速度快。因此，近幾十年來，磷光傳感器的研究十分活躍。
  13. Based on the electromagnetic theories, this dissertation presents an analytical method to analyze the el ectromagnetic field caused by the solenoid coil with ferrite core that is popularly used in eddy - current non - destructing test ( not )

    本論文從電磁場理論出發，應用解析方法分析了渦流無損檢測用帶磁芯的放置式線圈的阻抗，並利用數值方法和實驗驗證了分析結果。
  14. Below are the work and results of the dissertation : 1. analytical solution to the eddy - current transducer with ferrite core according to the practical eddy - current transducer used in eddy - current not, the analytical model described by a solenoid coil with a coaxial cylindrical ferrite core of finite length " is established

    論文的主要工作和結論概括如下：一、渦流傳感器電磁場解析解根據渦流無損檢測中實際使用的放置式線圈傳感器，建立了含有共軸有限長磁芯的通電圓柱線圈電磁場分析模型。
  15. In steady and transient state, air temperature field and flow field inside the thermoelectric refrigerator, loaded and no loaded, are calculated by using a cfd software pheonics

    採用pheonics數值模擬軟體，對熱電冰箱的無負載瞬態工作、有負載穩態和瞬態工作時箱內溫度場和流場進行了數值模擬。
  16. 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。
  17. We have investigated transport properties of electrons in magnetic quantum structures under an applied constant electric field. the transmission coefficient and current density have been calculated for electron tunneling through structures consisting of identical magnetic barriers and magnetic wells and structures consisting of unidentical magnetic barriers and magnetic wells. it is shown that the transmission coefficient of electrons in a wider nonresonance energy region is enhanced under an applied electric field. the resonance is suppressed for electron tunneling through double - barrier magnetic ( dbm ) structures arranged with identical magnetic barriers and magnetic wells. incomplete resonance at zero bias is changed to complete resonance at proper bias for electron tunneling through dbm structures arranged with different magnetic barriers and magnetic wells. the results also indicate that there exist negative conductivity and noticeable size effect in dbm structures

    對磁量子結構中電子在外加恆定電場下的輸運性質進行了研究.分別計算了電子隧穿相同磁壘磁阱和不同磁壘磁阱構成的兩種磁量子結構的傳輸概率和電流密度.計算結果表明，在相當寬廣的非共振電子入射能區，外加電場下電子的傳輸概率比無電場時增加.對于電子隧穿相同磁壘磁阱構成的雙磁壘結構，共振減弱；對于電子隧穿不同磁壘磁阱構成的雙磁壘結構，無電場作用時的非完全共振在適當的偏置電壓下轉化為完全共振，這時的電子可實現理想的共振隧穿.研究同時表明，磁量子結構中存在著顯著的量子尺寸效應和負微分電導
  18. The power angle characteristics are acquired and compared with the unsaturated curves. it is concluded that the stability limit of the power angle is less than 90 degree. reactive power regulating curves are calculated and compared with those curves when saturation effect is not considered, the result is that u type curves are deviated to the right

    通過對同步發電機各種運行曲線的計算，在已有文獻的基礎上更進一步分析了鐵磁材料飽和以及磁場畸變對同步發電機運行特性和參數的影響；求出了空載特性曲線和零功率負載特性曲線，在不同的電樞電流下計算得到的波梯電抗不同；求出了功角特性曲線，與不計飽和時的功角特性曲線相比較，功角穩定極限小於90 ；求出無功調節曲線，與不計飽和時相比較， u型曲線向右偏移。
  19. Adopting rotor field - oriented vector control methods, through which make the stator and the rotor magnetmotive forces can be kept orthogonal all along during operation of the bldcm, combining hysteresis current modulation ' s current control advantage and space voltage vector modulation ' s torque ripple attenuation advantage, then designing a sort of bldcm hysteresis current svpwm control method

    摘要研究採用轉子磁場定向的矢量控制方法使無刷直流電動機定、轉子磁勢矢量始終保持正交，結合滯環調制電流控制和空間電壓矢量調制，設計了無刷直流電動機滯環電流svpwm控制方案。
  20. In contrast with conventional thermo - ionic cathode, field emitter array ( fea ) cathode has many special advantages, such as room - temperature operation without a cathode heater, high current density, low power dissipation, excellent on / off isolation characteristics and instant turn - on characteristics

    與傳統的熱陰極相比，場發射陣列陰極具有許多獨特的優點，如無需加熱，可以在室溫下工作;電流密度比熱陰極高幾個數量級，並可工作在低電壓調制下;功耗低;極好的開關特性;可瞬時啟動等。
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