負電導 的英文怎麼說
中文拼音 [fùdiàndǎo]
負電導
英文
negative conductance-
As a comparison, ba1. 03ce0. 8gd0. 2o3 - was synthesized by sol - gel method. among these samples, nonstoichiometric samples were synthesized for the first time. the research work involved : the crystal phase of the sinters were determined by xrd ; ionic conduction under different experimental atmospheres was measured by gas concentration cells ; performances of hydrogen - air fuel cells with the sinters as electrolytes and porous pt as electrodes were measured
用粉末x射線衍射儀鑒定它們的結晶相；在（ 600 1000 ）范圍內，以燒結體作為電解質隔膜，多孔性pt黑為正、負電極， pt - rh合金網為集電極，分別組成氫濃差電池、氧濃差電池及氫?空氣燃料電池並測定了它們的性能，研究了不同氣氛下樣品的離子導電特性及影響燃料電池性能的因素。Negative conductance in semicond uctors
負電導在半導體中Similarly, either an addition of positive charge or a removal of negative charge will result in an excess positive charge.
加入正電荷或移出負電荷，都將同樣地導致過剩的正電荷。Bias voltage, which are related to the superlattice structural paraments, the doped densities and the applied bias voltage. we have also investigated the characteristics of superlattice under hydrostatic pressure by simulations
超晶格的負微分電導區還導致出現固定偏壓下隨時間變化的電流自維持振蕩，振蕩產生的條件依賴于其結構參數，摻雜濃度和外加偏壓的大小。Specification for negative - charging organic photoconductive drum for lbp
速激光印表機負電性有機光導鼓技術條件The negative photoconductivity effect was found in the dimixing phthalocyanine composites. the experiment results indicated that the negative photoconductivity effects were closely related with the partial charge transfer from the center metals to phthalocyanine rings, and the separation efficiency of photocarriers was a key factor to the photoconductivity
結果表明，共混復合后，其光電導性能表現出負效應，並發現酞菁中心金屬與其相連的氮原子之間的部分電荷轉移是引起復合體系光電導性能變化的根本原因，同時復合體系中的電子空穴對的分離效率是影響光電性能的一個重要因素。The head of the program, chemical engineering professor richard wool, said researchers looked to chicken feathers because they have shafts that are hollow but strong, and made mostly of air, a great conductor of electricity
該項目負責人化學工程教授理查德?沃爾說，研究員們之所以採用雞毛是因為雞毛桿是空的，而且很硬，中間大部分是空氣，是一種很理想的電導體。The transient simulation of stator winding inter - turn short circuit fault has been completed successfully based on the multi - loop mathematical model
基於神經網路技術，提出了以定子負序導納平均值作為故障特徵量的異步電動機定子繞組匝間短路故障檢測方法。Positive electrode and negative electrode that execute spanning crack prevention are simulated as the source point and merged point, so the temperature field owing to the concentration of current around the crack tip is educed at the moment when the current is switch on
將實施跨越止裂時的正、負電極比擬為電流場中的源和匯，從而導出了在瞬間電流作用下，裂紋尖端附近區域因繞流而形成的溫度場。Over load working of transformers are guided by iec905 loading guide for dry type power transformers
按照iec905 《乾式電力變壓器負載導則》 ，是指導變壓器過負荷（超銘牌額定值）運行。The angle between cu, ph and the first axis is very small, shows significant positive association. the angle between mn, electrical conductivity and the second axis is also small, showing significant association, and the correlations between p and the second axis are significantly negative
環境因子中，氮、有機質、海拔與第一軸呈負相關，其餘因子與第一軸呈正相關，而銅、 ph值與第一軸夾角很小，說明它們和水分梯度有顯著的正相關，而錳、電導率與第二軸夾角小，說明它們與第二軸相關性大，而磷和第二軸卻呈顯著負相關。Recent years, the using of piezoelectric sensors becomes a focus in novel biosensors research. the basic principle is that the characters of its oscillation are highly responded with the changes of the surface mass adsorption, or the physic characters in the reaction system including density, viscosity, conductivity and so on. a piezoelectric biosensor with a nanogram sensitivity could be constructed through a reasonable biological processing and structure designing to the piezoelectric quartz crystal
近年來，壓電傳感器檢測技術逐漸成為生物分析中的研究熱點，其基本原理是利用石英晶體振蕩特性對石英晶體表面質量負載（質量效應）和反應體系物理性狀如密度、粘度、電導率（非質量效應）等的改變具有高度敏感的特性，通過對石英晶體進行適當的生物學處理和結構設計，構建出具有具有ng級檢測能力的生物傳感器。The numerical method based on the coupling of the finite difference method in time domain with the discrete fast fourier transform is applied to calculate the first four eigenfrequencies and eigenfunctions of the six - cavity with open boundary. the absorbing boundary condition for tem wave is tested numerically, and it is applied to writing the code. the cold testing of the cavity is done and the results are good agreement with the numerical results
計算x波段六腔開放腔前四個模式的場分佈;根據第二章公式分別計算x波段六腔開放腔前四個模式的電子負載電導並總結了這四種工作模式渡越效應的規律，基於這種小信號理論分析了x波段渡越輻射振蕩器，得到了工作模式及可能產生的模式競爭。Hollopeter, 20, is an aspiring director and a freshman at the new york film academy
二十歲的何洛彼德是一名充滿抱負的導演，就讀紐約電影學院一年級。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The research of the new and high conductivity material of lithium ionic conductor is always an interesting issue in the material field due to its low potential, light weight and providing high cell voltage and energy density
由於鋰具有較負的電極電勢和較輕的重量，可以為電化學器件提供高的電池電壓和能量密度，所以鋰離子導體高電導率新材料的研究一直是材料研究領域倍受關注的課題之一。The research team of prof chan hsiao chang, director of the epithelial cell biology research centre, in collaboration with zhejiang academy of medical sciences, demonstrated that cystic fibrosis transmembrane conductance regulator cftr is involved in transporting bicarbonate into sperm, and thus, is vital to sperm fertilizing capacity and male fertility. cftr is an anion channel, mutations of which cause cystic fibrosis, a disease characterized by defective cl - and hco3 - transport with clinical manifestations in a number of organ systems
由陳小章教授領導的香港中文大學上皮細胞生物學研究中心的研究人員，與浙江醫學科學院合作，證實囊性纖維化跨膜電導調節器（ cftr ）負責輸送碳酸氫根進入精子，對精子授精能力及男性生育能力非常重要； cftr是一個陰離子通道，其基因突變會導致囊性纖維化，因為氯離子和碳酸氫根（ hco3 - ）分泌缺陷，引發一系列器官病徵。Abstract : the rechargeble batteries are used for backup power internal electrically equipments and instruments. but batteries lifetime usually is shorten by overwork and then malfunctions of equipment are induced. to avoid the complexion described above, the protection circuit against overwork is designed. it is based upon the voltage comparator and regulator. it will light up a red led when the volume of the batteries discharged close upon 50 % ; it will switch off the load automatically when it discharged closing to 80 % of their energy capacity, thus overwork of batteries can be avoided and lifetime may be extended
文摘:用蓄電池做后備電源的系統（或設備） ，常因過放電導致電池提前報廢而造成設備故障.根據電池電壓隨容量變化的規律，利用電壓比較器和電壓基準源設計製作了電池放電保護電路，當電池放電量接近容量的50 %時，啟動預警信號；當電池放電量達到容量的80 %時，電路自動切斷負載，防止電池過度放電，延長電池壽命，保證系統（或設備）在供電恢復正常后能正常運行However, when the applied bias voltage is located within negative slope regions of u - i curve, the superlattice will undergo a very fast dynamic process, changing from one stable state to another stable state. the superlattice exhibits temporal current oscillations in the negative differential conductivity region at fixed d. c
當外加電壓使電流處于正微分電導區變動時，超晶格的高低電場疇之間的疇邊界不發生移動，只是相應的電場強度作些調整；當外加電壓使電流處于負阻區域時，超晶格將經歷一個穩態到另外一個穩態的動力學轉變。There was a significant negative correlation between electric conductivity and vigor index, indicated the electricl conductivity could be used as a selective index for flood tolerance breeding in brassica napus l
電導率與活力指數之間有極顯著的負相關，可用來快速篩選油菜耐濕性材料。分享友人