Point Defects in Pb-, Bi-, and In-Doped CdZnTe Detectors: Deep-Level Transient Spectroscopy (DLTS) Measurements

We studied, by current deep-level transient spectroscopy (I-DLTS), point defects induced in CdZnTe detectors by three dopants: Pb, Bi, and In. Pb-doped CdZnTe detectors have a new acceptor trap at around 0.48?eV. The absence of a V_Cd trap suggests that all Cd vacancies are compensated by Pb interstitials after they form a deep-acceptor complex [[Pb_Cd]⁺-V _Cd ^2? ]^?. Bi-doped CdZnTe detectors had two distinct traps: a shallow trap at around 36?meV and a deep donor trap at around 0.82?eV. In detectors doped with In, we noted three well-known traps: two acceptor levels at around 0.18?eV (A-centers) and 0.31?eV (V_Cd), and a deep trap at around 1.1?eV.     

省内干线传送网IP化之路

业务全面IP化、网络全面宽带化,成为这个时代的两大方向,并在省内干线传送网领域形成了富有激情的碰撞。“面向全IP业务的光传送网”显示出越来越明晰的框架,引领着最新的技术潮流。从未来来看,网络的IP化、扁平化不可逆转,省内干线传送网络最终会成为IP over Optical的架构。     

CAN总线远程传输可靠性的设计方法和实现

针对CAN总线远距离可靠性传输问题,分析了影响可靠性的主要因素,提出一系列的解决方法。并基于C8051F040设计实现可靠的CAN总线远距离传输系统,实验表明所提方法是可行的,并在实际的工程中也得到了验证。     

meta-Linked spirobifluorene/phosphine oxide hybrids as host materials for deep blue phosphorescent organic light-emitting diodes

This study investigated the use of a novel modification in molecular design to get two new electron-transport host materials, SF3PO and BSF3PO. By linking the phosphine oxide moieties at meta-position of spirobifluorene rings, higher triplet energies could be easily achieved for these two new materials. The steric spirobifluorene structures could guarantee their good thermal stabilities. According to these properties, their applications as host materials for deep blue phosphorescent organic light-emitting diodes (PHOLEDs) were explored. As expected, the deep blue emitting devices with Ir-complex FIr6 as phosphorescent dopants and SF3PO and BSF3PO as hosts had been fabricated and showed high efficiency of 28.5 and 22.0 cd/A, respectively, which were significantly higher than that of the para-linked analogue SPPO1.     

超宽带SiC MESFET器件的研制

采用中国电子科技集团公司第十三研究所自主外延材料及标准工艺平台制作了SiC MESFET芯片,采用管壳内匹配及外电路匹配相结合的方法,制作了超宽带SiC MESFET器件。优化了管壳内匹配形式,采用内匹配技术提高了器件输入阻抗及输出阻抗,采用外电路匹配的方法对器件阻抗进行了进一步提升。通过对输出匹配电路的优化实现了超宽带功率输出。优化了外电路偏置电路,消除了栅压调制效应,提高了电路稳定性。栅宽5 mm器件,脉宽为100μs、占空比为10%脉冲工作,工作电压VDS为48 V,在0.8～2.0 GHz频带内脉冲输出功率为15.2 W(41.83 dBm),功率密度达到3.04 W/mm,功率增益为8.8 dB,效率为35.8%,最终实现了超宽带大功率器件的制作。     

大功率半导体激光列阵单光纤耦合技术

利用阶梯反射镜整形技术和偏振合束及波长合束技术成功将两只波长为808nm和两只波长为980nm的40W大功率半导体激光器光束进行混合,最后得到输出功率为95.8W、耦合效率为60%的双波长大功率半导体激光列阵单光纤耦合模块,光纤芯径为400μm,数值孔径为0.22.     

基于ROS的无人派件精灵系统设计

该文主要是对物流配送机器人在校园、社区、室内等环境下的物流配送的"路径规划-包裹配送-运动控制-环境建模-位置定位"展开研究。采用了ROS(Robot Operating System)机器人操作系统作为整个物流配送机器人的核心,通过ROS开源操作系统的功能包结合外围传感器来结合PID算法的差速运动模型来实现对机器人的任意角度运动控制以及远程控制,通过外围传感器进行对周边的环境信息进行感知结合SLAM算法进行二维地图的构建。通过在构建好的地图上进行设计一个起始点和一个目标点,物流配送机器人在该地图中进行路径规划,在规划好的路线执行导航到目标点,在导航的途中遇到障碍物,机器人会自动的避开障碍物或者从新规划路线,从而来实现包裹从起始点到目标点的配送工作。     

基于MSP430的动感单车测速系统设计

主要论述了MSP430F149低功耗单片机TIMER A捕获方式的工作原理、霍尔传感器的工作方式,利用MSP430F149单片机捕获方式和霍尔传感器A44E设计了动感单车的速度测量系统,同时给出了较为精确的计算方法以及程序设计过程。     

数字微波通信系统架构及传输体制选择

阐述数字微波通信的系统结构及数字微波通信系统的组成,并通过对PDH与SDH数字传输体制的比较分析来根据实际情况确定所要采用的传输模式,同时说明本站系统升级改造的必要性。