基于Ardence RTX的1553B驱动程序开发

文中针对飞控组件对实时性的要求,基于RTX平台对1553B进行相关的驱动程序开发。笔者首先在硬件方面对1553B总线进行介绍,经过对RTX平台优越性的分析,最终选定开发平台并对相关驱动程序开发的过程进行了较详细阐述。     

基于VC＋＋的STATCOM监控系统设计与实现

以VC＋＋6.0作为开发平台,详细介绍了STATCOM监控系统的构成,并从界面设计、通讯接口设计以及数据库设计三方面分别阐述了本系统的设计思想,实现了对STATCOM设备的远程控制、实时监测以及信息存储显示等功能.实际使用表明本系统性能稳定,界面友好,操作便捷,能够很好地满足用户需求.     

Photoluminescence of an Yba＋/Al3＋-codoped microstructured optical fibre

An Yba＋/Al3＋-codoped microstructured optical fibre is prepared based on photonic crystal fibre technology. The characteristic spectra of preforms and fibres are experimentally investigated. The results show that under a 971 nm excitation, besides the known infrared fluorescence luminescence around 1050 nm, a blue luminescence peak at 486 nm is obtained. Moreover, an unexpected emission peak at 730 nm is also observed. The photoluminescence mechanism of an Yba＋/Al3＋-codoped microstructured optical fibre is discussed. The emission peak at 486 nm is attributed to the cooperative upconversion resulting from pairs of Yb3＋ ions, and the emission peak around 730 nm is ascribed to the stimulated Raman scattering because of nonlinear effects of microstructured optical fibre. The Yba＋/Al3＋-codoped microstructured optical fibre is promising for varieties of applications from laser printing and optical recording to cancer treatments, such as photodynamic therapy.     

香豆素-亚胺型Cu~(2+)识别荧光探针的合成及性能

以2,4-二羟基水杨醛为原料经Knoevenagel缩合反应、脱乙酰化反应,再与4-二乙氨基水杨醛经缩合反应,进而通过甲基化合成了新型的香豆素荧光探针.利用核磁共振氢谱(1 H NMR)、碳谱(13 C NMR)和高分辩质谱对所合成的目标化合物进行了结构确认,并测定了其荧光光谱.结果表明,目标化合物对Cu2+有较好的选择性和灵敏度,且当Cu2+浓度在0.66~10μmol·L-1范围内时探针的荧光强度与其浓度有较好的线性关系.Job分析法表明探针与金属离子作用形成1∶1结合的络合物.     

基于DSP＋FPGA的数字导弹飞控计算机设计

针对在舵机、导引头、惯导等弹上设备日益数字化的趋势下飞控系统的需求,提出了一种基于DSP＋FPGA结构的通用飞控计算机平台.DSP＋FPGA结构能发挥两种处理芯片各自的优势,而且具有良好的通用性和扩展性.针对多个外部设备数据同步问题,采用2个双端口RAM交替工作的方法,保证各弹上设备数据帧的同步和完整连续.通过半实物仿真系统的验证,飞控计算机性能良好,性能满足设计要求.     

液/液界面萃取循环伏安法测定Pb2+离子研究

本文利用吡咯烷二硫代氨基甲酸铵（APDC）作为螯合剂,甲基异丁酮（MIBK）作为萃取剂,将水相中的Pb2+萃取到有机相中,利用经典的三电极系统研究该有机相在液/液界面的伏安特性。实验结果表明,该电化学过程是一个由扩散控制的不可逆过程,Pb2+的萃取物从有机相转移到水相。铅萃取物的转移峰在0.16V vs.SCE处,并且在1.0×10-5~ 9.0×10-5mol/L范围内与峰电流大小成正比。这一方法为工业废水中铅的在线、现场测定提供了可靠、灵敏的监测方法。     

Photoluminescence properties of Ce3＋ and Mn2＋-activated Ba9Sc2Si6O24 phosphor for white light emitting diodes

A single-phased silicate compound (Ba1-xCex)9(Sc1-yMny)2Si6O24 was prepared by solid-state reaction at high temperature. From powder X-ray diffraction (XRD) analysis, the formation of Ba9Sc2Si6O24 with an R3 space group was confirmed. In the photoluminescence spectra under ultraviolet (UV) ray excitation, the Ba9Sc2Si6O24:Ce3+,Mn2+ phosphor emits two distinctive color light bands: a blue one originating from Ce3+and a red one caused by Mn2+. The energy transfer process from Ce3+ to Mn2+ was confirmed, the critical radius as well as the transfer efficiency was calculated, and the energy transfer mechanism was discussed. In addition, the decay-time testing indicates that the energy transfer efficiencies from Ce(1) to Mn2+ and Ce(2) to Mn2+ are different. The emission chromaticity of Ba9Sc2Si6O24:Ce3+,Mn2+ phosphor could be tuned from blue to red by altering the Ce3+/Mn2+ concentration ratio.     

The temperature dependence of single-event transients in 90-nm CMOS dual-well and triple-well NMOSFETs

This paper investigates the temperature dependence of single-event transients(SETs) in 90-nm complementary metat-oxide semiconductor(CMOS) dual-well and triple-well negative metal-oxide semiconductor field-effect transistors(NMOSFETs).Technology computer-aided design(TCAD) three-dimensional(3D) simulations show that the drain current pulse duration increases from 85 ps to 245 ps for triple-well but only increases from 65 ps to 98 ps for dual-well when the temperature increases from-55℃ to 125℃,which is closely correlated with the NMOSFET sources.This reveals that the pulse width increases with temperature in dual-well due to the weakening of the anti-amplification bipolar effect while increases with temperature in triple-well due to the enhancement of the bipolar amplification.     

氧化钇（铒,镱）的合成及上转换发光

采用均相沉淀,马弗炉煅烧的方法,合成了一系列Y2O3∶Er3＋,Yb3＋上转换发光材料.该类材料在波长为980 nm半导体激光器激发下发射出中心波长为564nm的绿色和662nm的红色上转换荧光,分别对应于Er3＋离子的4S3/2/2H11/2→4I15/2和4F9/2→4I15/2跃迁.探讨了不同合成条件对其上转换发光强度和波长的影响,发现沉淀时的pH值,煅烧温度和沉淀中Er3＋、Yb3＋的相对浓度对其发光有显著影响.     

水产养殖物联网监控系统的设计

针对蓝色经济区水产养殖粗放式管理现状,设计了新型水产养殖物联网监控系统。该系统的传感器节点负责水质数据采集功能,并通过Zigbee无线传感器网络将数据发送给汇聚节点,汇聚节点通过GPRS模块接入Internet网络,将数据传送至远程监控中心。同时监控中心设置的各项参数通过Internet和汇聚节点传到采用PIC单片机的控制节点,实现水质的自动控制。监测中心软件采用C＋＋ Builder开发,为用户提供形象直观的实时数据监测平台。经过在日照市某水产养殖基地的试用,系统性能满足水产养殖水质监控的应用要求。