Sb掺杂SnO2修饰双电层电容活性炭电极的研究

应用sol-gel浸渍与热处理工艺相结合,在活性炭表面包覆Sb掺杂的SnO2薄膜对电极进行修饰,构成AC-SnO2/KOH/AC-SnO2双电层电容器,测试结果表明,400 mA/g电流密度条件下,修饰后的双电层电容器在0.001～1.5 V相对较高电压区间的放电容量,比AC/KOH/AC双电层电容器在0.001～1.0 V电压区间高36%,但AC-SnO2的单电极比电容仅为AC单电极比电容的91.9%;当电流密度大于400 mA/g,两种电极的大电流性能相当。     

基于FPGA的高精度TDI-CCD信号发生器的设计

由于航天相机所使用的TDI-CCD(Time Delay and Integration Charge Coupled Devices)芯片价格昂贵而且极易损坏,提出了一种利用FPGA(Field Pmgrammable Gate Array)和多通道D/A转换器构成的宽频、高精度TDI-CCD信号发生器的原理方案和实现方法。通过对FPGA器件APA075和D/A转换器件DAC2900的配置,得到频率为11MHz的相关双采样形式的模拟TDI-CCD信号,同时通过改进PCB设计和滤波电路,提高了输出信号的精度,降低了噪声。本设计具有可编程、宽频、高精度和低硬件复杂度等特点,目前已成功应用到新一代高分辨率航天相机数据采集系统的研制中。     

Anion Acceptors Dioxaborinane Contained in Solid State Polymer Electrolyte: Preparation,Characterization, and DFT Calculations

A novel dioxaborinane‐contained solid state polymer electrolyte poly((2‐phenyl‐1, 3, 2‐dioxaborolane‐4‐yl) methyl methacrylate) (P(GMMA‐PBA)) for symmetrical capacitors (SCs) is prepared through solution casting technique. Due to the effect of electron withdrawing of dioxaborinane groups and irregular distributed porous microstructures, the solid polymer electrolyte (SPE) exhibits an optimal ionic conductivity of 0.5 mS cm^?1 at ambient conditions. The electronic properties of dioxaborinane groups and their interaction with anions of electrolyte salts are further studied with density functional theory calculations. SCs fabricated with this polymer film as electrolyte and reduced graphene oxide as electrodes provide a broad potential window of 2.5 V. The energy density of this capacitor ups to 22.49 Wh kg^?1 with a power density of 6.34 kW kg^?1 at 5 A g^?1. After 3000 charge–discharge cycles, the capacitance of the symmetrical SPE capacitor maintains 90% of its initial values.     

模拟微波传输数字化改造方案探讨

本文简要阐述了我省利用模拟微波通道进行数字化改造的试验过程。根据具体情况,提出不同的数字化改造方案选择。     

DC and microwave noise transient behavior of InP/InGaAs doubleheterojunction bipolar transistor (DHBT) with polyimide passivation

DC and microwave noise transient behavior of InP/InGaAs double heterojunction bipolar transistor (DHBT) with polyimide passivation is reported in this paper for the first time. The base transient current is believed to be due to the change of surface potential near the base-emitter junction perimeter at the polyimide/emitter interface resulting from a decrease in the amount of trapped electrons in the polyimide. We also find that the surface potential on the sidewall of collector-emitter affected by the charge trapping and detrapping in polyimide may induce a parasitic polyimide field effect transistor along the surface of the base-collector junction which results in an excess collector transient current. These base and collector current transients result in associated transient of broadband shot noise. The time dependence of microwave noise figures due to the excess transients is also investigated. The better understanding of the mechanisms of the noise transient behavior of the InP HBT device is very useful to improve the device and circuit reliability     

一种简化的非相干迭代译码算法

给出了简化的软输出非相干最大后验概率算法和相应的迭代译码算法,仿真结果表明,该算法比传统的差分检测性能优越1．5dB。     

导弹武器系统贮存期间检测周期的确定方法

导弹装备具有长期贮存的特性,必须对贮存装备进行质量控制,通过定期监测和修复贮存失效的方法,使装备在贮存期间满足预期的可靠性要求,因此确定合理的检测周期十分必要.提出了一种确定检测周期的新方法,同时以实际数据为基础,综合运用可靠性与维修性理论、现代数理统计知识、定性与定量相结合等方法进行分析,应用Matlab软件进行仿真.     

GAUSSIAN PRINCIPLE COMPONENTS FOR NONLOCAL MEANS IMAGE DENOISING

NonLocal Means (NLM),taking fully advantage of image redundancy,has been proved to be very effective in noise removal.However,high computational load limits its wide application.Based on Principle Comp...     

PSTM金属样品成像实验的数值模拟

本文采用时域多分辨分析法（MRTD）,并利用FDTD方法的完全匹配层（UPML）作为边界条件,对Eckert等人在实验中所使用的喷溅金属铝小块样品作了数值模拟分析,给出了在PSTM模型中喷溅金属铝小块样品的数值模拟的三维图像,并对试验结果和理论结果进行了比较和分析,验证了Eckert等人的实验。     

Design of coating for broadband polarization- independent beam splitters and analysis of its optical performance

Thebeamsplitters(BS)havedemonstratedwideap plicationinmanyopticalsystemsandplayakeyrolein interferometryandholography[1].ThemechanismofBScanbedividedintotwocategories:oneutilizesthereflec tionandrefractionontheinterfacebetweentwodielec tricmedia;theotheru…