基于红外光声光谱的气体检测系统设计

随着工业现代化的发展,环境变化日益复杂,而人民的环境健康意识也在不断提高.在这种情况下,传统的气体检测系统已不能满足要求,有待开发一种高灵敏度、高分辨率的新型实时气体检测系统.从气体分子红外光谱理论出发,在对当前各种气体检测方法进行分析比较的基础上,设计了一种基于光声光谱技术的气体检测系统.实验证明：该系统可有效进行CO2气体检测.     

量子搜索算法体系及其应用

Grover量子搜索算法正在逐渐演变成一个算法体系,并逐渐进入了实际应用阶段。文章中通过几何法论述了经典Grover算法,通过算符法引申出了该算法的扩展,并在两种情况下对该算法进行了讨论。在分析该算法实际应用基本策略的基础上,论述了函数全局优化问题的改进,提出了通过量子搜索算法改进纯适应搜索算法的新思想。     

调度自动化系统PAS高级软件的应用

PAS应用软件基本功能的实用化在国内外已经成为一种必然发展趋势，根据哈尔滨地区电网的实际应用情况综述了其结构、功能，提出了该软件的实用性和有待改进与完善的地方。     

长治电网SCADA/PAS/DTS/集控中心一体化系统应用实践

介绍了长治电网SCADA/PAS/DTS/集控中心一体化系统的开发平台、体系结构、技术特点、实现方式,着重阐述了PAS/DTS一体化实现模式,介绍了一体化系统实现的主要功能.     

Influence of metallic properties on the fracture characteristics of Al2O3/Ti/Ni-laminated composites

The mutual confinement of ceramics and metals in laminated composites tends to change the original properties of ceramics and metals. In this study, two kinds of laminated composites, Al₂O₃/Ti and Al₂O₃/Ti/Ni, were prepared. Three-point bending experiments revealed that Al₂O₃/Ti underwent brittle fracture after elastic deformation. The fracture morphology analysis revealed that the Ti in Al₂O₃/Ti became brittle due to the formation of columnar crystals. The temperature gradient perpendicular to the direction of laminations during preparation was responsible for the formation of columnar crystals. The force–displacement curves of the Al₂O₃/Ti/Ni combine the properties of elastic deformation of ceramics and plastic deformation of metals. The reason why the Al₂O₃/Ti/Ni did not fracture completely in the bending experiments is that Ni maintained the toughness, and there is a good interfacial bond among Al₂O₃, Ti, and Ni. The indentation crack analysis revealed that cracks have long transverse propagation and short longitudinal propagation in both laminated composites. Finite element analysis revealed that this was due to compressive stress in the Al₂O₃ layer and tensile stress in the metal layer. This compressive stress consumes the crack energy in the longitudinal direction and stops the crack in the metal layer. The brittle to ductile gradient transition among Al₂O₃, Ti, and Ni, combined with the guidance of crack propagation direction by the interfacial layer, enhances the ability of Al₂O₃/Ti/Ni to resist damage.     

金华电网基于IEC 61970标准的SCADA/PAS一体化集成

文章介绍了金华电业局SCADA/PAS一体化集成的技术路线和实现原理.同时,为了更好的解决电力企业各应用系统孤岛林立,信息共享和互操作性差的问题,该文提出了采用IT行业的最新技术,遵循国际标准,建立一个基于IEC 61970标准的EMS异构数据平台,实现EMS在应用级别上的开放,该项研究成果已实际应用于金华电网,并取得了良好的效果.     

个人通信接入系统(PAS)的关键技术

在介绍个人通信接入系统（PAS）的体系结构的基础上,进一步阐述了个人通信接入系统的几点关键技术。     

MIMO信道中衰落信号的多谱勒功率谱

MIMO系统中的角度功率谱有多种分布形式，所以经典多普勒功率谱不再适用。针对常用的均匀分布、余弦分布、高斯分布和拉氏分布的入射波角度功率谱，分别推导了多谱勒功率谱解析式。通过仿真比较了不同角度功率谱下的多普勒功率谱,并分析各种参数对其的影响。这些工作对MIMO信道中频率扩散的刻画做了拓展。     

PAS试剂处理含锰废水的动力学探讨

为解决含锰工业废水对环境、土壤及生物带来的危害。研究采用吸聚合硫酸铝作为附剂,希望能找到最佳吸附条件,同时为聚合硫酸铝的综合利用提供更多机会;采用EDTA滴定法,对含锰废水进行了吸附研究,模拟测定了影响聚合硫酸铝吸附特性的两种因素:滤料投加量、吸附时间。结果表明:随着投加量增加,Mn2+去除率提高,单位吸附量线性下降;随着吸附时间延长,Mn2+去除率提高,超过80min后提高幅度变缓,吸附过程符合二级动力学模型。采用聚合硫酸铝吸附含锰工业废水在适当工艺条件下可以有很好的处理效果。这种方法较简便,成本低廉,能达到以废治废的目的。     

Preparation and studies of transparent conductive monolayers of multiwall carbon nanotubes on quartz and flexible polymer with the use of modified Langmuir technique

An improved Langmuir method is described and applied to produce transparent, conductive and flexible single layer of multiwall carbon nanotubes. This paper presents properties of multiwall carbon nanotubes spread on water subphase and in a form of Langmuir–Schaefer layers on a quartz plate and on flexible polymeric foil. The results show very high homogeneity of the monolayers on a very large area obtained with the use of the proposed modified Langmuir method and indicate their relatively high radiation transmission and electrical conductivity. Laser scanning confocal and scanning electron microscopic images of the layers are presented. The microscopic visualization of the nanolayers is supported by spectroscopic studies (transmittance, photoacoustics) in the range from ultraviolet to mid-infrared. Moreover, electric measurements (current versus voltage characteristics) of the carbon material on the polymeric foil are presented.The obtained results of the investigated multiwall carbon nanotubes are discussed in a view of potential application in optoelectronics.