双波段成象及融合技术研究

概括地分析了双波段成象技术的发展概况，分析了成象技术的基本原理，提出了红外双波段基本方案和涉及的关键技术，分析和计算了系统的基本性能。最后，讨论了双波段及融合技术，认为在双波段实现融合应以自主式结构为主。     

Laplace spectra as fingerprints for image recognition

In the area of image retrieval from data bases and for copyright protection of large image collections there is a growing demand for unique but easily computable fingerprints for images. These fingerprints can be used to quickly identify every image within a larger set of possibly similar images. This paper introduces a novel method to automatically obtain such fingerprints from an image. It is based on a reinterpretation of an image as a Riemannian manifold. This representation is feasible for gray value images and color images. We discuss the use of the spectrum of eigenvalues of different variants of the Laplace operator as a fingerprint and show the usability of this approach in several use cases. Contrary to existing works in this area we do not only use the discrete Laplacian, but also with a particular emphasis the underlying continuous operator. This allows better results in comparing the resulting spectra and deeper insights in the problems arising. We show how the well known discrete Laplacian is related to the continuous Laplace-Beltrami operator. Furthermore, we introduce the new concept of solid height functions to overcome some potential limitations of the method.     

古文物的拉曼光谱分析

利用拉曼光谱对云南腾冲出土的新石期的石斧和北京古玩市场上的古玉器进行成分分析．样品未作任何特殊处理，用显微共焦拉曼光谱仪对样品不同部位进行分析．实验发现石斧为蓝晶石矿物而非硬玉；翡翠制品中含有环氧树脂谱线．这一研究工作表明，拉曼光谱作为现代技术非常适合于不允许取样的珍贵艺术品的无损辨识成分分析。     

Surface modifications of activated carbon by gamma irradiation

Four commercial activated carbons with different chemical and textural characteristics were modified by gamma irradiation under five different conditions: irradiated in absence of water, in presence of ultrapure water, in ultrapure water at pH = 1.0 and 1000 mg L⁻¹ Cl⁻, in ultrapure water at pH = 7.5 and 1000 mg L⁻¹ Br⁻, and in ultrapure water at pH = 12.5 and 1000 mg L⁻¹ NO₃⁻. Changes in surface chemistry were studied by X-ray photoelectron spectroscopy; pH of point of zero charge, total acidic groups and total basic groups, which were determined by assessment with HCl and NaOH; and textural changes were determined by obtaining the corresponding adsorption isotherms of N₂ and CO₂. Outcomes show that the activated carbon surface chemistry can be modified by gamma irradiation and that the changes depend on the irradiation conditions. Modifications in the sp² hybridization of the surface carbons suggest that the irradiated carbons undergo graphitization. Measurements of structural parameters indicate that the irradiation treatment does not modify the textural properties of the carbons. Finally, studies of pristine and irradiated activated carbons using diffuse reflectance spectroscopy with the Kubelka–Munk function revealed a reduction in band gap energy in the irradiated carbons associated with an increase in sp² hybridization of the carbon atoms.     

柱体截面不同二维光子晶体透射谱TMM数值研究

为了研究柱体截面对二维光子晶体传输特性的影响,应用转移矩阵方法数值计算不同截面形状柱体组成二维光子晶体的透射谱。数值结果表明在一定的入射方向。某些频率的光不能在光子晶体中传播即出现所谓的禁带．禁带的宽度、频率范围、频率中心与光予晶体柱体的截面形状有关。在相同截面时可通过角度调节实现对禁带的微调。     

X射线粉末衍射谱的峰度盲目反卷积

应用基于峰度的盲目反卷积算法处理X射线粉末衍射谱,实验表明该算法提高了X射线粉末衍射仪的分辨率,获得更接近真实的衍射谱,有助于对材料结构和缺陷的精细研究.     

碳纳米管/纳米TiO2-聚苯胺复合膜电极的制备及电容性能研究

用循环伏安法，在含有0．2mol／L苯胺的0．5mol／L硫酸溶液中，以50mv／s的扫描速度，在-0．1-0．9V的范围内实现了苯胺在Ti基碳纳米管／纳米TiO2电极上的电化学聚合，并用循环伏安（CV）法和电化学交流阻抗谱（EIS）对制备的碳纳米管／纳米TiO2-聚苯胺（CNT／nanoTiO2-PAn）复合膜电极的电化学性质进行了表征，同时进一步对该电极的充放电性能进行了研究。实验结果表明，此条件下得到的PAn膜电极具有良好的导电性，同时具有疏松、多孔的网络结构；充放电测试研究表明，基于CNT／TiO2基体上的PAn膜的面积比电容在放电电流密度为2．5mA／cm^2时达到了833mF／cm^2,说明有很好的电容性能，可以作为超级电容器的电极材料。     

共振光散射法测定阿昔洛韦铁（Ⅲ）—阿昔洛韦—K_3[Fe（CN）_6]体系的共振瑞利散射光谱及其分析应用研究

在稀盐酸介质中,阿昔洛韦能还原Fe3＋为Fe2＋,Fe2＋进一步与[Fe（CN）6]3-反应生成配合物Fe3[Fe（CN）6]2,此时能引起RRS光谱的显著增强。散射强度（ΔI）在一定范围内与药物浓度呈线性关系,方法对阿昔洛韦的检出限为0.038μg/mL,线性范围0.05～4.0μg/mL。文章研究了RRS法的适宜反应条件和共存物质的影响,由此发展了高灵敏、简便快速测定阿昔洛韦的新方法,可用于尿样中阿昔洛韦的测定。     

2－取代亚胺基－3－［N－（2－氯乙基）］氨甲酰四氢噻唑类化合物的质谱研究

介绍十三种新的２－取代亚胺基－３－［Ｎ－（２－氯乙基）］氨甲酰四氢噻唑化合物的电子轰击（ＥＩ）质谱及其分子离子峰。它们的特征峰为ｍ／ｚ［Ｍ—１０５］＋，［Ｍ—４９］＋，［Ｍ—３５］＋，１０５，５６等。其中Ｍ—１０５碎片的强度较大（大多为基峰）。据此，提出了它们经电子轰击断裂的可能途径──麦克拉弗蒂重排（ＭｃＬａｆｆｅｒｔｙＲｅａｒｒａｎｇｅｍｅｎｔ）。     

PbMoO_4晶体的布里渊散射谱

报导了利用布里渊谱仪对PbMoO_4晶体进行90°和180°散射实验的测试结果。通过分析计算,得到了沿正z方向传播的声学波的声速和某些弹性参数。