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 根据前两章的分析设计出补偿应变多量子阱的有源区结构；然后分析计算了器件的电注入和光输出过程，指出降低顶层的电阻率和增加顶层厚度都可以使注入电流更有效地扩展到上电极外面的区域，增加厚度还可以增加器件的侧面出光。
Dynamic induced current electrical impedance tomography ( iceit ) is one important branch of electrical impedance tomography ( eit ) . the main difference between iceit and traditional eit is that iceit uses induced current to drive while traditional eit uses injected current , which can improve the current distribution of the inner part of the image area , and make the measured boundary voltage reveals more impedance information of the inner image area 动态感应电流电阻抗断层成像( iceit )是电阻抗断层成像( eit )技术的一个重要的分支，它改传统的eit以注入电流驱动为感应电流驱动，能显著地改善成像区域内部的电流分布状况，使得测量所得的边界电压能反映更多的区域内部的信息。
A new viewpoint to observe the relation of bus voltage , bus current injection and branch current of the network considering branch mutual inductance has been provided in this paper . the process of building the z - matrix of a large - scale power network is set forth in particular in this paper . and the method is employed in the fault computation system successfully 本文为了从算法上提高故障计算的速度，在完全计及支路互感的前提下，利用节点注入电流与支路电流以及支路电流与节点电压的关系，提出了一种能够统一处理互感和无互感线路、快速形成大规模电网节点阻抗矩阵的新方法。
So lead to their polarization behavior not as good as edge lasers . the paper researched the polarization of vcsel theoretically and experimentally , the main work is as follows : part . without consideration the applied strain and temperature , we resolved numerically the maxwell - bloch equation through four - energy level polarized dynamic model 通过四能级偏振动力学模型，在不考虑外加应变以及温度的前提下，对maxwell - bloch方程进行数值求解，研究了随着注入电流以及各向异性的变化引起的vcsel的出射偏振光的强度、频率和相位变化。
In order to measure the characteristics of such semiconductor optical amplifier , we adopted a set of measurement system . this measurement system can be used to measure the characteristics of all kinds of active or inactive optical passive components . such device presents good polarization insensitivity ( < 0 . 9db ) , wide 3db bandwidth ( > 33nm ) at 0 - 200ma and different input signal light wavelength and power , the maximum fiber - to - fiber gain of 10db , lossless operation current of 50 - 75ma for different input signal light wavelength and power , large extinction ratio ( > 50db ) and lower noise figure ( nf ) ( < 8db ) 与张瑞英博士一起，首次利用该种有源区结构制备出偏振不灵敏半导体光放大器，并在0 - 200ma注入电流范围内获得33nm的3db带宽，在不同信号波长，不同信号功率0 - 200ma的注入电流范围内，偏振相关损耗均《 0 . 9db ，在耦合差损为7db / facet的条件下，最大fiber - to - fiher增益达10db ，无损操作电流为50 - 70ma ，消光比达50db以上，而噪声指数则低于8db ，最小可达4 . 6db 。
In the end , this thesis tests the resonator with three methods in case that it is both open looped and closed looped , and gets the results listed below : 1 taking 1 mhz frequency width ld as the light source , using current injecting frequency modulation method , the output characteristic of the resonator is got , which proves that the laser used in the lab can be used to modulate the frequency using current injecting frequency modulation 本文最后采用三种不同的方法对谐振式光纤陀螺进行了开环和闭环的实验测试，并取得了以下实验结果： 1 、用频宽1mhz的ld作光源，采用电流注入调频的方法，观测到了谐振腔的输出特性曲线。证明了实验采用的激光器可以通过注入电流的方法实现调频。
In this paper , several typical roics , roic noise and processing techniques are analyzed systematically in theory , and the computer simulated experiments are done . in the third chapter , many performances are analyzed on typical cmos roic theoretically in detail , such as the non - uniformity , injection efficiency , bias steadiness , frequency characteristic and threshold - voltage non - uniformity 本文第三章首先对典型致冷型cmos读出电路的非均匀性、注入效率、偏置稳定性、注入电流的频率特性以及阈值电压非均匀性等问题进行了较为全面的理论分析和计算机仿真实验研究。
