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
In optical fiber aspect, the incident beam can be collimated, converted and focused by some kinds of lenses, making the mode of incident beam matched with or near the optical fiber ’ s modes. in this thesis, thorough theoretical analyses and experimental investigations were made for the external optical properties of a 980nm high - power tunnel junction regenerated multi - active - region quantum well stripe - geometry algaas / gaas / ingaas ld and three different stripe - width 980nm high - power
本論文圍繞本實驗室研發的新型隧道再生多有源
區980nmalgaas / gaas / ingaas量子
阱大功率半導體激光器和多種條寬的單有源
區980nmalgaas / gaas / ingaas量子
阱大功率半導體激光器的光場外特性、單模階躍折射率光纖和多模漸變折射率光纖的模場特性進行了深入的理論分析和實驗研究。
The main works are as the follows. in view of the contradiction among frequency, output power and dissipation power, propose deep - trench junction termination structure filling with isolated materials and collector - combed ( base - combed ) structure
主要工作包括以下幾個方面：針對頻率與功率、功耗的矛盾，提出了絕緣深
阱結終端結構和梳狀集電結（基
區）結構。
From the exact expression of the field, we obtain a multipole polynomial expansion, and under the paraxial condition we furthermore obtain the approximate expression. the loffe trap, consisting of two coils with parallel currents and four straight conductors with currents in alternating directions, is one of the most important traps. we specially study the field structure of it by using both the exact expression and a multipole polynomial expansion that facilitates studies of classical or quantum orbits. if the region near the origin is of interest, we may obtain a simple expression of the field and this configuration may be called idealized loffe trap
若只討論
阱中的近原點
區域時，
阱中的磁場可以呈現出一種簡潔的形式，人們把它稱為理想ioffe
阱。磁矩反平行於磁場的中性粒子在
阱中與磁場發生相互作用，藉助相互作用勢，可以獲得粒子在
阱中的經典運動方程。在一定的近似條件下，我們可以採用逐次近似的方法，使方程簡化，其中三個分量式中關于z的方程比較容易求解，而關于x 、 y的方程則演化為我們熟悉的馬丟方程的形式。
First, the dissertation demonstrates that inflation target should be a reach round zero referring to the research on optimal inflation rate, that is to say, anti - deflation and anti - inflation are both the task of inflation targeting. second, the dissertation distinguishes good and bad deflation by exploring the aggregate demand and supply factors causing the price presentation, meanwhile, inflation targeting can avoid the economy be trapped into bad deflation by setting and implementing inflation target. third, the dissertation analyzes liquidity trap by comparing with deflation and points that depreciating money and adjusting economic structure are respectively short - term and long - term projects dealing with it
作者將「通貨緊縮」看作一種價格表現的同時，發掘造成這種價格持續下跌的表象背後的供求因素，在總供求分析的基礎上，指出「通貨緊縮」有「好」 「壞」之分，而「通貨膨脹目標制度」通過設定通貨膨脹目標
區間，能夠及時阻止出現「壞」的通貨緊縮；作者
區分了「通貨緊縮」和「流動性陷
阱」 ，指出貨幣貶值和經濟結構調整分別是應對「流動性陷
阱」的短期和長期方案。
4 design of hb - led is focused on mqws and top layer. compensatory mqws for led active layers have led to good results follow the analysis in former two chapters. systematic analysis of current injection and light output via external quantum efficiency of hb - led showed mat the optimum of top layer of hb - led is appeared to be between 15 u m and 20 u m, and at least is 5 u m
根據前兩章的分析設計出補償應變多量子
阱的有源
區結構；然後分析計算了器件的電注入和光輸出過程，指出降低頂層的電阻率和增加頂層厚度都可以使注入電流更有效地擴展到上電極外面的
區域，增加厚度還可以增加器件的側面出光。
Many gettering techniques have been widely studied to overcome this problem by removing metal impurities from active regions of device. one new gettering method that has recently received growing interest is the use of nanocavities resulting from helium or hydrogen implantation
所以需要減小有源
區中金屬雜質的濃度，通常採用吸除的方法把金屬雜質從器件有源
區吸收到有源
區之外預先形成的sink （陷
阱）中。
The effect of a few important geometrical and physical parameters which include the length of the active region, the thickness of the active region, bulk traps, interface traps, on the tft ( thin film transistor ) characteristics of polycrystalline silicon has been investigated by using advanced two dimensional device simulation program medici
摘要利用高級二維器件模擬程序medici分析了多晶矽薄膜晶體管有源
區的長度、體內陷
阱、界面陷
阱、柵氧化層厚度等幾何參數及物理參數，並研究了這些參數對薄膜晶體管特性的影響。
( 5 ) discovered a abnormal law that the sonic velocity was enlarged with increasing of die core porosity in the sandstone reservoir of the haojiagou formation in triassic, and gave a geologic interpretation about the phenomenon. it was helpful to convert the sonic velocity into die porosity correctly in reservoir. ( 6 ) gave a primary reason for producing a little oil and gas in the well ha - 2 and ha - 3 of the sidaogou structure
通過取心段地層巖性與聲波測井速度分析，首次發現郝家溝組儲層段巖芯孔隙度與聲波時差（聲波速度）存在反常變化規律，並對這種現象進行了較合理的地質解釋；提出了儲層預測中應注意的問題，首次提出在本
區按常規方法利用聲波時差換算孔隙度存在陷
阱。
In future columns, we ll alert you to the major root causes - such as buffer overflow problems and race conditions - so that you can avoid these traps
在未來的專欄里，我們將就主要的根本原因（諸如緩沖
區溢出問題和爭用情況）向您提出警告以便您可以避免這些陷
阱。
For being with many advantages, it has been an active subject in recent years and much progress has been made. on the basic of analysis of many kinds of led structures, a new kind of strained layer structure has been introduced into our designed hb - led which has been manufactured in our laboratory to demonstrate a even higher efficient light emission. through calculation of led external quantum efficiency, a method for design hb - led top layer was evaluated
本論文分析了當前國內外各種led的結構及其製作工藝，在技術上較為成熟的雙異質結構基礎上，我們在器件的有源
區引入應變多量子
阱結構，並根據實際需求增加補償應變技術以保證發光層結構的穩定性；通過對器件外量子效率的計算，使得在器件設計有了定量的理論分析依據；並採用先進的渦輪lp - mocvd成功制備出galnp gaalinp應變多量子
阱高亮度發光二極體器件。
According to change of nominal interest rate and its effects on increase of economy and investment, we can differentiate " mobile trap in a narrow sense " from " that in a broad sense ", which haven ' t occurred in ate country since the outlay curtailment in 1997
摘要根據名義利率變動及其對投資與經濟增長的影響
區分出「狹義流動性陷
阱」和「廣義流動性陷
阱」 ，我國1997年底出現通貨緊縮以後不存在兩種意義的「流動性陷
阱」 。
The quasi - physical method makes the original problem an optimization problem in mathematics. there is often the possibility of going to a local minimum of object function when we solve the optimization problem mathematically. as for how to jump out of the trap of local minimum so that the calculation can head for a region with better prospects, the quasi - physical method is helpless
擬物方法將原始問題落實為優化問題，而用數學方法在求解優化問題時，常常會碰到計算落入目標函數的局部極小值陷階的困境，如何從這種困境中逃逸出來，使得計算奔向前景更好的區域，擬物方法則無能為力，而應用擬人方法則可以設計出好的「跳出陷阱」策略。
