Microstructure and optical properties of Ag5In5Te47Sb33 phase change thin films with high reflection in thermal annealing process

The microstructure and optical properties of Ag-5In-5Te 47Sb 33 phase change films with high reflection in the thermal annealing process were systematically reported. The as_deposited film is amorphous and its crystalline temperature is 160℃. The annealed films are crystalline. The crystalline phases are AgInTe-2, AgSbTe-2 and Sb when annealed at low temperature. When annealed at 220℃, the AgInTe-2 phase disappears and the amount of AgSbTe-2 is the largest. The research of electronic transmission microscopy shows that the morphology of AgSbTe 2 is sphere and that of Sb is bludgeon. The reflection of the annealed films is higher and reaches its peak value at 220℃.     

Enhancing site style tree construction algorithm

The World Wide Web has become a global information service center with a vast amount of news, advertisements, product and service information, and disparate information from diversified sources. However, only a small portion of information is truly relevant and useful to the users who are seeking information on specific topics. In this paper, common relations among nodes are taken into consideration when constructing site style tree, and a new node type is introduced. Experimental results show that the proposed algorithm has higher precision and recall.      

N,N′-亚烃基脂肪酸双酰胺的合成及其润滑性能

研究了文题化合物的合成,制备了二十一种该类化合物。红外光谱及元素分析数据证实了这些化合物结构的正确性。由混炼塑化仪测定了它们的润滑性能,探讨了其润滑性能与分子结构之间的关系。结果表明,芥酸的双酰胺较硬脂酸的双酰胺具有更好的润滑作用;特别是N,N′-(1,2-亚乙基)双芥酸酰胺,明显优于国内目前生产的N,N′-(1,2-亚乙基)双硬脂酰胺和芥酸酰胺。     

低阶双重幻方的不存在性

本文证明了当ｎ＝３，４时，ｎ阶双重幻方是不存在的。     

对大学生实行量化管理的探讨

结合高校学生管理工作实际,从分析影响学生整体素质的构因入手,力求把自然科学的有关理论移植到学生管理工作中,提出了量化管理的新模式,以求学生管理改革的不断深入。     

Some considerations of organic materials for high density optical disk data storage

The application possibilities of organic materials for high density optical disk data storage are discussed. Several points, such as physical and chemical stabilities, wavelength match and reversible property changes, which should be taken into consideration, are presented.     

Photoinduced effects in amorphous semiconductor Ge(S, Se)2 chalcogenide films

The blue shift of optical transmittance edges were observed in amorphous semiconductor Ge(S, Se)2 chalcogenide films with light illumination. The shift in well-annealed films could be recovered by annealing the films near the glass-transition temperature again. The photocrystallization was also observed in amorphous Ge(S,Se)2 films with light illumination by the transmitting electron microscope measurement. The photoinduced phenomina of the amorphous Ge(S,Se)2 films could be applied to designing some new kinds of optical storage materials.     

Photoinduced effects in amorphous semiconductor Ge(S, Se)2 chalcogenide films

The blue shift of optical transmittance edges were observed in amorphous semiconductor Ge(S, Se)₂ chalcogenide films with light illumination. The shift in well-annealed films could be recovered by annealing the films near the glass-transition temperature again. The photocrystallization was also observed in amorphous Ge(S,Se)₂ films with light illumination by the transmitting electron microscope measurement. The photoinduced phenomina of the amorphous Ge(S,Se)₂ films could be applied to designing some new kinds of optical storage materials.     

青金石产地探源

青金石是一种最古老的玉石，也是东西方文化交流的见证之一。概述了青金石的产地来源和使用历史。利用质子激发X射线荧光（PIXE）、X射线衍射（XRD）、激光拉曼光谱（LRS）以及扫描电镜（SEM）技术对来自阿富汗、俄罗斯贝加尔湖等地的几个青金石样品进行了岩石矿物学特征分析。实验结果显示了不同质地青金石的不同成分组成和微观结构特征。伴生矿物的种类和含量差异为探寻青金石的产地来源提供了有益的信息。     

关于中国古代玻璃研究的几个问题

化学成分体系的确定是中国古代玻璃研究中的一个重要方面。采用外束质子激发X射线荧光（PIXE）、感应耦合等离子发射光谱（ICP—AES）等技术对中国古代玻璃的化学成分进行分析，并结合国内外其他学者对古代玻璃研究的现有成果，从科技研究的角度对中国古代玻璃（主要是东汉以前）研究中存在的相关问题进行探讨。指出：应加强对西周到战国时期中国出土的釉砂、玻砂、镶嵌玻璃珠（含陶胎镶嵌玻璃珠），以及伴随古代玻璃同时出土的绿松石等文物的科技研究，并结合对中国古代陶瓷和冶金技术的研究，以进一步探索中国古代玻璃技术的发展。