影响红外反射涂层降温性能的因素

研究了影响红外反射降温涂层的影响因素,分析了涂层颜料体系的特点及提高热辐射能力的方法,提高了涂层的降温能力.     

Photonic Crystal Palette of Binary Block Copolymer Blends for Full Visible Structural Color Encryption

Structural color (SC) arising from a periodically ordered self-assembled block copolymer (BCP) photonic crystal (PC) is useful for reflective-mode sensing displays owing to its capability of stimuli-responsive structure alteration. However, a set of PC inks, each providing a precisely addressable SC in the full visible range, has rarely been demonstrated. Here, a strategy for developing BCP PC inks with tunable structures is presented. This involves solution-blending of two lamellar-forming BCPs with different molecular weights. By controlling the mixing ratio of the two BCPs, a thin 1D BCP PC film is developed with alternating in-plane lamellae whose periodicity varies linearly from ≈46 to ≈91 nm. Subsequent preferential swelling of one-type lamellae with either solvent or non-volatile ionic liquid causes the photonic band gap of the films to red-shift, giving rise to full-visible-range SC correlated with the pristine nanostructures of the blended films in both liquid and solid states. The BCP PC palette of solution-blended binary solutions is conveniently employed in various coating processes, allowing facile development of BCP SC on the targeted surface. Furthermore, full-color SC paintings are realized with their transparent PC inks, facilitating low-power pattern encryption.     

舰船可视化指挥调度通信系统设想

本文结合当前舰船指挥调度通信系统的大趋势，设想了一个指挥调度系统可视化方案，组建了一个有线／无线混合的可视化指挥调度系统，说明了此系统的功能及关键技术，并在理论上阐述了方案的可行性。     

用Decklink Duo采集卡实现双通道SDI输出

在靶场光电测量任务中,为满足远距离实时监测任务进展的需求,常要将数字相机采集的图像信号转换为SDI视频信号,并将相应信息叠加后显示输出。针对这一问题,以Microsoft Visual Stdio 2010为软件开发平台,结合OpenCV2.4.11,利用Decklink Duo采集卡将Camera Link Full图像视频信号转换为双通道SDI信号输出,并分别对这些信号进行了文字信息叠加显示处理以及模拟红外伪彩色处理。实验达到了预期的显示效果,证明该方法有效,可以满足实际任务的要求。     

四-(4-三甲铵苯基)卟啉测定食品中的痕量铜

以水溶性α.β.γ.δ—四—(4—三甲铵苯基)卟啉[T-(4-TAP)P]作显色剂,测定了食品中的痕量铜。对实验条件及共存离子的干扰进行了探讨。在乙醇介质及强酸条件下测定时,其选择性及灵敏度均有显著提高。摩尔吸收系数为4.5×10~5 1mol~(-1).cm~(-1)最小检验量为:0.14ng/cm~2,回收率为96.2～106%,变异系数为:0.46～3.6%。操作简便,结果满意。     

Substrate issues for the growth of mercury cadmium telluride

Close lattice matching and lattice compatibility with mercury cadmium telluride (MCT) make CdTe and related alloys ideal substrate materials for growth of MCT layers for the purpose of making high-performance second-generation infrared detectors. However, the limitations in the properties of CdTe and the difficulties in its bulk growth have prompted extensive research in the area of alternative substrates. Some basic relevant characteristics of substrates such as sapphire, GaAs, and silicon are compared and the possibilities and problems associated with each material are analyzed in the light of the most recent results in the field.     

Higher order spectral estimation for random fields

This paper is concerned with the nonparametric estimation of the higher order cumulant spectra of vector-valued stationary random fields onZ ^d by smoothing the periodograms, whereZ is the space of integers and the dimensiond1. We derive the asymptotic cumulant properties of the spectral estimates, and consider an application to multidimensional nonlinear systems identification. Numerical examples with simulated data are provided.     

基于Zigbee无线传感器网络的智能灯光跟随系统

设计一个基于Zigbee的智能灯光跟随系统。系统中连接有人体红外热释电传感器的Zigbee结点等距离分布在走廊或道路的旁边,检测特定区域人员是否存在的信息,并将信息传于协调器节点,协调器节点连接主控制器PX-A270,PXA270根据采集的信息控制舵机的转向和照明装置的亮与灭,实现有人走动存在时,灯光随着人的转移而转移,无人时照明系统自动熄灭,从而实现节约能源的效果。     

用近红外光谱检测牛奶中的三聚氰胺

研究了用近红外光谱法快速定性和定量检测纯牛奶中三聚氰胺.实验分别配制了两组不同三聚氰胺含量的纯牛奶样品,用于定性和定量分析.通过近红外光谱与聚类分析法相结合,可将含有和不含有三聚氰胺的牛奶样品有效分类;结合光谱预处理和波长选择及模型优化方法建立的检测三聚氰胺的近红外定量分析模型具有较好的稳定性和预测能力.结果表明,近红外光谱分析是一种快速、方便和环保的检测乳制品中三聚氰胺的新方法.     

热处理对紫色翡翠光谱学特征影响的研究

使用X射线衍射仪(XRD)、紫外-可见吸收光谱仪(UV-VIS)与拉曼光谱仪,对进行氧化气氛热处理前后的紫色翡翠样品进行光谱测试。XRD分析结果显示,紫色翡翠样品中95%以上是硬玉成分。热处理前后的紫外-可见吸收光谱对比结果显示,样品热处理后的光谱和热处理前相比,437nm处尖峰以及580nm处吸收包基本消失;而拉曼光谱图对比结果显示,热处理后黄褐色部位拉曼峰值基线整体呈上升趋势。分析结果表明,紫色翡翠样品主要致色离子为Fe2+,在经过热处理后,Fe2+氧化成为Fe3+,生成Fe2O3,从而致使热处理后的紫色翡翠样品呈现出黄褐色。