嵌入式web服务器在CTM系统中的应用

本文分析了传统的城市交通监控采用专用网络进行数据传输的不足,介绍了嵌入式web服务器的工作原理,并提出了利用其改造现有的城市交通监控系统的方法。     

Web日志挖掘数据预处理过程技术研究

在Web数据挖掘研究领域中,Web日志挖掘是Web数据挖掘研究领域中一个最重要的应用方面。本文介绍了面向Web日志的数据挖掘预处理的一般过程并给出了用户识别的算法实现。     

FPGA在某电视跟踪系统中的应用

介绍了一种以DSP为核心的数字式电视跟踪系统,主要研究了利用FPGA控制、处理数字视频信号的方法,实现了实时的视频叠加。详细讨论了FPGA的控制逻辑及其相关部分结构。采用FPGA实现视频显示信息的叠加,可有效减轻DSP的速度压力,提高系统性能。     

碳化锆碱熔制备氧氯化锆的研究

以碳化锆为原料，采用碱熔一水洗一酸浸．结晶工艺制备氧氯化锆，制得的氧氯化锆产品中ZrO2含量达到36．20％。考察了氢氧化钠与碳化锆物料比、碱熔温度、碱熔时间和碳化锆粒度对碱熔过程中锆转化率的影响，以及水与碱熔料比、水洗温度和水洗时间对水洗过程中除硅率的影响。用X射线衍射分析研究了碳化锆在煅烧碱熔过程中的物相变化。结果表明，碱熔过程中碳化锆转化为偏锆酸钠，碱熔的最佳工艺条件为：氢氧化钠与碳化锆的质量比为1.5，煅烧温度800℃，煅烧时间60min，矿样粒度120目。在该工艺条件下碱熔，锆的转化率可达到99％以上。     

压制压力对多孔TiAl合金孔结构及过滤性能的影响

以Ti、Al混合粉末为原料，通过反应烧结制备TiAl金属间化合物多孔过滤材料，分析压制压力对孔隙率、最大孔径及渗透系数的影响。结果表明：随着压制压力从90MPa增加到375MPa时，总孔隙率呈“急剧减小-平缓减小-平缓减小-平缓减小”的变化趋势，开孔隙率呈“急剧减小-平缓减小-显著增大-急剧减小”的变化趋势，最大孔径呈“急剧减小-减小-减小-减小”变化，而渗透系数呈“急剧减小-平缓减小-平缓增大-急剧减小”的变化。综合考虑压制压力对孔隙率、最大孔径及渗透系数的影响，当压制压力为250MPa时，TiAl合金烧结坯具有较大的开孔隙率、较小的孔径和较大的渗透系数。改变颗粒之间的间隙大小及数量，从而影响反应造孔和孔隙长大，是压制压力影响孔隙率、最大孔径的机制。     

还原-锈蚀法生产人造金红石技术现状及攀钢采用该工艺可行性分析

主要介绍了国内外还原-锈蚀法生产人造金红石工艺技术特点，并对攀枝花钛资源采用还原．锈蚀法生产沸腾氯化钛原料——人造金红石的可行性进行了分析探讨。     

基于属性相似度的属性约简算法

为解决粗糙集属性约简算法存在的诸多问题，从属性相似度出发推导出属性相似度与粒度相似度的一致性，进而提出了一种基于属性相似度的属性约简算法，主要包括采用分明矩阵法求条件属性集的约简，核的求取，可省属性的相似度计算和最简约简的求出等步骤，仿真与对比分析表明其计算简便、效果显著。     

Some key technics of drop tower experiment device of National Microgravity Laboratory (China) (NMLC)

Microgravity science and application pro-ject is a very important part of Chinese space effort. This area has been very active along with the international space activities in re-cent years and has got many important re-sults. The completion and running of the international space station will further pro-mote the research activities in the area of microgravity science and application. The National Microgravity Laboratory (China) (NMLC) was established in the mid-dle of the 1990s. Drop towe…     

Observation and computer simulation of multicomponent chemical short-range order （MCSRO） for the bulk metallic glasses

The atomic configuration of chemical short-range order (CSRO) for the Zr-base metallic glasses was investigated by using nano-diffraction and high resolution transmission electronic microscopy (HRTEM) technology with a beam size of 0.5 rim. It is illustrated that the pattern of atomic configuration of CSRO might have various compound counterparts because of the chemical interaction of bonding atoms. Some atomic configuration of MCSRO is similar to the icosahedral structure with 10-fold symmetry of very weak spots. In deed, the nano-beam technology could clearly detect the evolution of atomic configuration in nanometer scale during the transformation from the metallic melt to the primary crystallization. The local atomic configuration of CSRO is also investigated by molecular dynamics simulation (MD) for the Zr2Ni compound in a wider temperature range. The CSRO in the melt could be pictorially demonstrated as distorted coordination polyhedron of the compound structure and/or the structure similar to cubo-octahedron analogs. The MD simulation illustrates that the atomic packing of long-range order disappears just above the melting point, but the chemical interaction of bonding atoms still exists that leads to form the various CSRO with the atomic configuration similar to stable or metastable unit cell of Zr2Ni compound. The icosahedral polyhedron became more abundance as the overheating temperature was raised.     

中国民间名窑与现代陶艺艺术风格的比较

通过对中国民间名窑和现代陶艺的分析、论述,解释为什么中国民间名窑是中国现代陶艺创作的要系.以民间名窑作为当代陶艺发展的创作根系,为我国现代陶艺普及研究和陶瓷产业的多元文化创新提供新的契机.