barrier field 中文意思是什麼

barrier field 解釋
勢壘場
  • barrier : n. 1. 柵，柵欄，隔欄，障壁，隔板，擋板；賽馬的出發柵。2. 關口，（海關）關卡。3. 障礙；壁壘；界線。4. （擴伸到海洋中的）南極洲冰層。vt. 用柵圍住。
  • field : n 菲爾德〈姓氏〉。n 1 原野，曠野；（海、空、冰雪等的）茫茫一片。2 田地，牧場；割草場；〈pl 〉〈集...
  1. In other words, how can the wind overcome the barrier of the geomagnetic field and drive the motions of the plasma inside the magnetosphere

    換言之，即太陽風是如何克服地球磁場的阻礙，進而驅動磁層里的電漿運動？
  2. Abstract : this paper studies the structure, function and realization of ceramic / metal gradient thermal barrier coatings dynamic design software by combining the conceptions of thermal barrier coatings ( tbcs ) and functional gradient materials ( fgms ). through a typical example, it compares and analyses the simulation results of temperature field in the multiplayer gradient cylinder model calculated by analytical method, finite difference method and finite element method

    文摘:結合熱障塗層和功能梯度材料的概念，研究陶瓷/金屬梯度熱障塗層動態設計軟體的結構與功能及其實現過程.通過具體的例子，對多層圓筒模型的溫度場的解析解、差分解及有限元解的模擬結果進行了比較及分析
  3. Combined with research task, " prospective study on alternatives of laboratory animal in china " ( 2000 - 2001 ), " barrier in international trade - research on alternatives of laboratory animal " ( 2000 - 2001 ), " the research on laboratory animal welfare and technological guideline, which is equivalent with international rule " ( 2002 - 2005 ), the thesis focused its statement, from two level of scientific progress and economical development, on the significance, necessity and imperativeness of three rs carried out in our country, based on collection. collation and analysis of the developing course, mode, influence factors and trends in three rs. the approach on overall thinking, support condition and effective operation in different stage, which is benefit to advance the progress of three rs research, has been made. the priority field of three rs research is also proposed in the thesis

    結合《我國開展動物實驗方法工作的前景研究》 （北京科委， 2000 - 2001 ） 、 《外貿中壁壘性技術-動物實驗替代方法的研究》 （國家科技部2000 - 2001 ）和《與世界接軌的實驗動物福利及技術規范研究》 （國家科技部2002 - 2005 ）三個項目研究工作，在收集、整理和分析國外3rs發展過程、發展模式、影響因素和發展動態的基礎上，本論文從科技進步和經濟發展兩個層面上，重點論述了我國開展3rs研究的意義，闡述了我國開展3rs研究的必要性和迫切性，探討了我國開展3rs研究的思路、有利條件和不同階段可採用的有效運行模式，提出了我國應優先開展3rs研究的重點領域。
  4. Based on the temperature field obtained by the thermal analysis, a parametric analysis is conducted to investigate the interlaminar stress at the interface between the composite and the thermal barrier in the cross - section of the inlet duct, using the commercial finite element software ansys

    在熱分析的基礎上，採用ansys有限元軟體計算了復合材料進氣道截面在假設工況下的應力場，為碳纖維纏繞復合材料進氣道熱防護方案的設計提供了實用的參考依據。
  5. We process calculations as the following : we calculate the binding energies of excitons in a square quantum - well wire in presence of a magnetic field for finite and infinite potential barrier case respectively

    A . balandin和s . bandyopadhyay也是利用變分法，採用二能帶模型計算了在外加磁場時的量子線中激子的基態束縛能。
  6. 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
  7. The performance of modulators employing mqw is governed by the quantum confined stark effect. in order to simplify the analysis of mqw, we obtain an explicit formula concerning the correlations between the gaas / gaalas quantum well widths of finite potential barrier structure and those of infinite potential barrier structure under the condition that the ground state energies are equal at zero bias states. then the transfer matrix method is used to investigate the optical field distribution in the mqw waveguide based on five - step asymmetric coupled quantum well structure that is really used in the modulator

    本論文首先根據量子限制stark效應，發展了等效寬度思想，提出了把單量子阱結構的有限深勢阱的分析轉化為無限深勢阱模型的顯式公式，從而大大簡化了電場下量子阱結構的分析；接著利用轉移矩陣，把周期性的量子阱結構簡化為三層結構，得到了實際採用的非對稱三阱結構量子阱的場分佈，並討論了量子阱結構的偏振特性。
  8. Based on the synthetic research of field outcrops, drilling section, well log and office compilation, combined with analyses of geological background, lithological association, sedimentary texture, sedimentary structure, geochemical and palaeobiological features, the researched area in the palaeozoic can be divided into deltas, braided deltas, lacus, barrier coast, continental shelf and carbonate platform etc. six kinds of sedimentary facies

    在野外露頭、鉆井剖面及測井曲線的綜合研究和室內編圖基礎上，綜合地質背景、巖性組合、沉積結構、沉積構造、地球化學及古生物學特徵，研究區古生界被劃分為三角洲、辮狀河三角洲、湖泊、障壁海岸、陸棚及碳酸鹽臺地等6種沉積相類型。
  9. For the first current plateau ， two kinds of sequential resonant tunneling of - process and - x process are observed in the wide barrier gaas / alas superlattice under various pressures for p < 2kbar ， the high field domain is formed by - process ， while for p > 2kbar ， the high field domain is formed by - x process when the barrier width was decreased to 2nm, we found that ground - state -

    對于寬壘（ > 3 . 5nm ）的gaaa / alas超晶格，當流體靜壓力超過臨界壓力2kbar后，平臺寬度隨壓力的升高而收縮。對于窄壘（ 2nm ） gaaa / alas超晶格， u - i曲線上的平臺將不隨壓力變窄。
  10. In this paper, first, the study of the distribution of electromagnetic field, energy, power, reflection coefficient and transmission coefficient in waveguide with piecewise different dielectric constants are studied. then, the behavior of propagation of am signal and gauss pulse signal through the waveguide are simulated by magic code ， and the plots of electromagnetic field, energy, ponyting vector and their spectrums at different time and different position are obtained. and, the group velocity and energy velocity of wave packet through barrier are calculated

    從90年代開始， emig和martin 、 landauer等人研究了分段填充不同介質的波導中的電磁脈沖的傳播。在本論文中，作者首先推導出分段填充不同介質的波導中的電磁場分佈、能量、傳輸功率以及反射系數和傳輸系數的表達式，然後，採用magic程序模擬了這種波導結構中電磁波的傳播情況，得到了在不同時刻和不同位置處的電磁場分布圖、能量圖、坡印廷矢量圖以及它們的頻譜圖，並由模擬結果計算了波包穿越勢壘的群速和能量速度。
  11. Though they discuss the impurity in the qwws under the electric field in more ditail, they localized the square gaas / ga _ ( 0. 63 ) al _ ( 0. 37 ) as qwws with the infinite potential barrier case

    前人雖然對外加電場下量子阱線中的雜質態做了較為詳細的討論，但是他們所選取的矩形量子阱線僅僅局限在無限深的情況。
  12. We discuss the qcse of the impurity in the finite square qwws considering impurity position, and raise a point of the qcse under the influence of the masses mismatch and the aspect ratio of the quantum well wires. without considersion of the mismatch of the effective masses between the well and barrier, we obtain the conclusion as follows : ( l ) the first band energy of the electron is decreased under the electric field

    在前人工作的基礎上，我們在有效質量近似下討論了外加電場下有限深方形gaas ga _ （ 0 . 63 ） al _ （ 0 . 37 ） as量子阱線的雜質態和雜質的stark能移，並把我們的結果與前人的結果進行了比較。
  13. The study areas have same engineering geological environment ; one oil - field road was built for exploring petroleum to be formed a wave barrier in 1995. the hydrodynamic condition between the both of side is different

    所選定的研究區，在1995年以前工程地質條件基本上是均勻一致的；一條為石油開采而於1995年在中潮坪修築的道路導致道路兩側的水動力條件發生了明顯的變化。
  14. Carrier aggregation on the interface between organic layer and electrodes may screen extra electric field and reduce barrier height for carrier injection. ( 3 ) we utilized oxd as buffer layer in anode and lif in cathode in single layer mehppv pleds. and the efficiency and brightness was doubled. the results implied that aggregation of minority carriers at the interface may the role of blocking layer

    （ 3 ）在單層mehppv器件的陽極引入oxd作為電子阻擋修飾層， lif作為陰極修飾層，利用阻擋少數載流子實現界面電荷積累的方法提高了器件發光亮度和效率，分析了器件電流電壓特性，使器件發光效率和亮度提高了一倍以上。
  15. The binding energies of excitons are calculated with the use of variational approach, we consider the mismatch of effective masses between the well and the barrier in the process of calculation, calculate and talk about the virial theorem values in square quantum - well wires in presence of a magnetic field

    本文採用變分法，在外加磁場條件下分別計算了激子在無限深和有限深方形量子線中的基態束縛能。在計算的過程中進一步考慮了阱，壘中粒子有效質量不匹配的影響，最後我們計算並討論了外加磁場情況下的維里定理。
  16. We find out the rule that the binding energies of excitons vary with the size of wires in the presence a magnetic field through the calculation. we compare the difference between our considering the mismatch of the effective masses of the wrell and barrier and our not considering the mismatch of the effective masses of the well and barrier

    通過計算得出在加磁場的情況下激子的束縛能隨線寬的變化壩律，同時我們發現在考慮了粒子的有效質量不匹配時激子的束縛能相對不考慮質量不匹配的情況增大。
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