我国明矾石的物化性质及其在水泥中的水化硬化

本文系统地介绍了我国明矾石的地质成因、化学成份和矿物组成及其在水泥中的水化硬化,提出了明矾石在碱-硫酸盐激发下形成钙矾石的水化机理,综述了我国利用明矾石作为特种水泥、外加剂的原料及作为普通水泥的混合材所取得的应用成果。     

新农村建设规划过程中的问题与对策探析——以都昌县新农村建设为例

建设社会主义新农村,要坚持规划先行,在当前新农村建设的过程中,合理地进行村庄建设规划具有重要的意义。本文就都昌县目前农村建设的现状及新农村建设规划过程中出现的相关问题进行探析,并对都昌县新农村建设提出了可行性的对策。     

循环经济在赣州矿产资源开发与管理中的研究

如何利用赣州矿产资源优势发展本地经济,节约资源开采,充分利用现有资源,实现资源的循环利用,保持生态环境的良好发展具有重要意义。本文分析介绍了循环经济、赣州矿产资源及开发利用现状,并提出了实现矿业循环经济的具体措施。     

Application of scanning tunnelling microscopy to the quality control of tungsten carbide (WC-Co) ball bearings

Scanning tunnelling microscopy (STM) has been applied to the topographical study of tungsten carbide (with 6% Co) ball bearings in air. It is shown that, for this material, scanning tunnelling microscopy can provide not only general topographical information on the surface microtexture with a resolution of nearly 0.1 nm if required, but also quantitative information for the measurement of surface roughness. Thus, scanning tunnelling microscopy has utility as a quality control tool of particular relevance in the submicron range. The STM topographical results from specific tungsten carbide ball bearings are presented, and the limitations and applicability of the STM technique when used as a quality control tool are discussed.     

A divide-and-conquer hole-filling method for handling disocclusion in single-view rendering

Large holes are unavoidably generated in depth image based rendering (DIBR) using a single color image and its associated depth map. Such holes are mainly caused by disocclusion, which occurs around the sharp depth discontinuities in the depth map. We propose a divide-and-conquer hole-filling method which refines the background depth pixels around the sharp depth discontinuities to address the disocclusion problem. Firstly, the disocclusion region is detected according to the degree of depth discontinuity, and the target area is marked as a binary mask. Then, the depth pixels located in the target area are modified by a linear interpolation process, whose pixel values decrease from the foreground depth value to the background depth value. Finally, in order to remove the isolated depth pixels, median filtering is adopted to refine the depth map. In these ways, disocclusion regions in the synthesized view are divided into several small holes after DIBR, and are easily filled by image inpainting. Experimental results demonstrate that the proposed method can effectively improve the quality of the synthesized view subjectively and objectively.     

LIGA技术及其在制造可动微结构件中的应用

介绍了将LIGA技术及其与牺牲层技术相结合 ,制造可动微结构的工艺方法。并给出了可实现摆动、转动的可动微结构———微执行器、微传感器和三维加速度传感器的制造过程等应用实例     

In-situ composition and luminescence of rare earth coordination polymers/silica/PEG hybrid materials

A two-step sol-gel method was developed with hydrochloride as an acid catalyst for the hydrolysis process and hexamethylenetetramine as base catalyst for the synthesis of terbium and europium coordination polymers with picotinic acid. Luminescent europium and terbium coordination polymers with picotinic acid were incorporated in silica gel/polymer hybrid matrix. In the range of concentration of luminescent species (0.1, 0.3, 0.5, 1.0, and 2.0 wt %), emission intensity increases with the increase of composition concentration, and no concentration quenching takes place. The text was submitted by the authors in English.     

Approaches to large-scale urban modeling

Large-scale urban modeling technologies use a variety of sensors and data acquisition techniques. The authors categorize current approaches and describe their advantages and disadvantages. Their survey examines current research with respect to several performance criteria including data acquisition sources, user interaction level, geometric fidelity, model completeness, and intended applications. Although modeling systems vary with respect to these criteria, data acquisition strongly influences model characteristics and usefulness. We therefore cluster the methods into those based on photogrammetry, active sensors, and hybrid sensor systems.