石墨烯基红外探测器的高k栅氧集成

从石墨烯发现与制备出发,综述了室温下双层石墨烯或石墨烯带禁带在0～250 meV可调的特性,及其在中远红外探测器的背栅、顶栅结构中作为栅氧形成材料的应用,并介绍了目前各种先进工艺.     

FPGA architecture of the LDPS Motion Estimation for H.264/AVC Video Coding

Motion estimation is a highly computational demanding operation during video compression process and significantly affects the output quality of an encoded sequence. Special hardware architectures are required to achieve real-time compression performance. Many fast search block matching motion estimation (BMME) algorithms have been developed in order to minimize search positions and speed up computation but they do not take into account how they can be effectively implemented by hardware. In this paper, we propose three new hardware architectures of fast search block matching motion estimation algorithm using Line Diamond Parallel Search (LDPS) for H.264/AVC video coding system. These architectures use pipeline and parallel processing techniques and present minimum latency, maximum throughput and full utilization of hardware resources. The VHDL code has been tested and can work at high frequency in a Xilinx Virtex-5 FPGA circuit for the three proposed architectures.     

S模式地面二次监视雷达及其关键技术分析

介绍了S模式地面二次监视雷达的组成和工作原理,结合实际情况与工程经验提出了实现S模式二次监视雷达的关键技术,并逐一进行了论述,最后提出了我国空管监视技术从A/C模式过渡到S模式的建议.     

美国军用手册338B中的软件可靠性预计模型及其应用

介绍美国军用手册338B中软件可靠性以及软件可靠性预计,具体讨论四种软件可靠性预计模型——Musa执行时间模型、Putnam模型、以及罗马实验室的RL-TR-92-52模型与RL- TR-92-15模型,并给出其适用条件和应用例子。     

动能拦截弹特性及其对抗措施

研究了国外多种动能拦截弹（KKV）导引头的制导方式和大气层外动能拦截弹的导引方式．对大气层外动能拦截弹的制导特性和拦截能力进行了研究,包括拦截空域、杀伤半径、横向修正能力等．提出了针对大气层外动能拦截弹的多种红外对抗手段．     

40Gb/S甚短距离光传输系统的去斜移设计(本期优秀论文)

实现了串/并转换成帧器接口(SFI-5)的去斜移功能.该设计主要由去斜移通道的帧对齐模块和数据通道去斜移模块组成,其中的关键电路由窗口比较器与滑动窗口生成器配合工作实现.16个数据通道去斜移电路轮流工作,共用一个窗口比较器,提高了电路的工作速度,节省了资源.系统测试表明,该电路可纠正±160比特范围内的通道间斜移,可应用于40Gb/s甚短距离传输的VSR5系统.     

刚挠结合印制板在等离子处理过程中爆板分析及改善

开窗是刚挠结合印制板实现挠性弯曲的关键工艺,主要有通窗和盲窗法,其中后者因过程可对挠性窗口区域起良好的保护作用等而广泛应用,但其生产过程存在等离子处理爆板风险。本文通过对压机真空度、刚板厚度、盲窗面积/周长比、开窗区域是否覆铜等因素的影响进行研究,具体分析了等离子过程产生爆板的原因,总结出了在真空压合的条件下,刚板厚度和开窗区域是否覆铜是影响生产板等离子处理爆板的主要因素,并提出了一种新型的改善方法——开窗区域去铜法,该方法可有效改善排气降低气压影响,为盲窗工艺的扩大应用提供参考。     

汽车近远光灯自动转换及障碍预警系统的研究

介绍了汽车近远光灯自动转换及障碍预警系统的电路设计,该系统由控制模块、光敏检测模块、激光检测模块、蜂鸣器报警模块等组成。重点研究了系统各个模块的功能实现以及工作过程。该系统具有灵敏度可调、可靠性高、操作方便、重量轻、体积小等特点。     

High-efficiency red electroluminescence from europium complex containing a neutral dipyrido(3,2-a:2′,3′-c)phenazine ligand in PLEDs

In order to obtain high-efficiency monochromatic red emission in polymer light-emitting devices, a tris(dibenzoylmethanato)(dipyrido(3,2-a:2′,3′-c)phenazine) europium [Eu(DBM)₃(DPPZ)] doped single-emissive-layer devices were fabricated using a blend of poly(9,9-dioctyl-fluorence) and 2-tert-butyl-phenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix by solution process. Significantly improved electro-luminescent properties with sharp red emission at 611.5 nm were displayed in the Eu(DBM)₃(DPPZ)-doped devices at dopant concentrations from 1 to 8 wt.%. The highest luminance up to 1783 cd/m² at 2 wt.% dopant concentration, as well as the maximum external quantum efficiency of 2.5% and current efficiency of 3.8 cd/A were obtained at 1 wt.% dopant concentration.     

Development of a new diindenopyrazine–benzotriazole copolymer for multifunctional application in organic field-effect transistors,polymer solar cells and light-emitting diodes

A new donor–acceptor (D?A) copolymer (PIPY–DTBTA) containing 6,12-dihydro-diindeno[1,2-b;1′,2′-e]pyrazine donor and benzotriazole acceptor was synthesized and characterized for multifunctional applications in organic field-effect transistors (OFETs), polymer solar cells (PSCs) and polymer light-emitting diodes (PLEDs). The polymer exhibits high molecular weights, excellent film-forming ability, a deep HOMO energy level, and good solution processability. Solution-processed thin film OFETs based on this polymer revealed good p-type characteristic with a high hole mobility up to 0.0521 cm² V^?1 s^?1. Bulk-heterojunction PSCs comprising this polymer and PC₆₁BM gave a power conversion efficiency (PCE) of 0.77%. The single-layer PLEDs based on PIPY–DTBTA emitted a yellow–red light with a maximum brightness of 385 cd m^?2 at the turn-on voltage of 6 V.