基于MPEG-4标准的VOD业务探讨

MPEG-4是动态图像专家组(MPEG)标准家庭中的一员，是国际化标准组织为多媒体通信制定的一种解决方案。介绍了MPEG-4支持的新功能和特点，并阐述了MPEG-4的关键技术，在此基础上对MPEG-4在视频点播业务中的应用问题进行了探讨。     

新钢炼铁系统技术进步

通过加强精料、实施技术改造、优化高炉操作等措施，新钢炼铁生产取得了明显的进步，技术经济指标明显改善。     

基于复数权值神经元的数字逻辑最稳健设计

复数权值神经元由于引入了多阈值逻辑而具有更强的性能,文中根据其数学模型,结合二进神经元稳健性的概念,提出了基于该神经元的稳健性定义.并结合定义,实现了基于单个神经元的基本数字逻辑以及异或运算的最稳健设计方案,从而证明了该稳健神经元实现任意数字逻辑的有效性和可行性,说明了其强大的处理能力.     

首钢2号高炉的技术进步

介绍首钢2号高炉大修采用的新技术、开炉操作和投产以来的生产情况。     

GIS中实时建立区域拓扑关系的快速算法

针对GIS中建立区域拓扑关系的实时性要求,论文提出一个结合基于图的拓扑信息和基于几何的左转算法的区域拓扑关系生成算法。利用区域的连通性提高了算法效率,左转算法保证了算法的可靠性。     

永州电力通信交换网集中操作和维护的实现

分析实现永州电力通信交换网集中操作和维护的必要性，介绍了实现程控交换机远程操作和维护的两种方式，总结在实践过程中所得到的经验和教训。     

紫外法测菜籽饼粕中硫代葡萄糖甙操作探讨

对用紫外法测菜籽饼粕中硫代葡萄糖甙过程中测试条件、操作质量等操作问题予以分析和探讨，以求提高测试结果的准确率。     

通讯技术在掘进机主令操作中的应用

介绍利用单片微机技术及可编程序控制器 (PLC)实现掘进机主令操作功能通讯模式化的方法 ,并介绍了其系统构成、实施思路和程序设计方法 ,可实现煤矿掘进机遥控操作     

Nonlinear Thermal Analysis for Qing-Tibet Railway Embankments in Cold Regions

Heat convection in ballast mass in railway embankments is a problem of heat convection in porous media. In order to calculate the temperature distribution of the Qing-Tibet railway embankment from the governing equations used to study forced convection for incompressible fluids porous media, detailed finite-element formulas for heat convection in porous media are derived using Galerkin’s method. The temperature distributions on central lines of the traditional railway embankment, the ripped-rock embankment, and the ripped-rock revetment embankment that were constructed on July 15, 2002 have been analyzed and compared on July 15, October 15 in the 24th year after construction, and January 15 in the 25th year after construction under the climatic and geological conditions on the Qing-Tibet Railway. The calculated results indicate that the traditional railway embankment will raise the permafrost temperature under the embankment base and make the permafrost embankment thermally unstable. The ripped-rock embankment and the ripped-rock revetment embankment will reduce the permafrost temperature under the embankment base in cold regions, therefore maintaining the thermal stability of permafrost. However, the ripped-rock embankment needs more rock mass while the ripped-rock revetment embankment need less rock mass, and its construction cost is lower than that of the former. Therefore, it is highly recommended that the ripped-rock revetment embankment be used for the Qing-Tibet railway embankment structure in high temperature permafrost regions so that the permafrost embankment can be protected as much as possible.     

30t转炉三位一体护炉实践

以转炉终点高拉碳操作法及降低出钢温度等操作护炉为根本护炉手段，溅渣为主要护炉方法，贴砖作为护炉的辅助措施，有效地提高了转炉炉龄，达到了1万炉以上，实现了根据设备检修计划下炉。