浅谈运营商互联网骨干网扩容优化方案

随着人们对互联网络依赖程度的增加，互联网骨干网的扩容与优化逐渐成为各运营商需要解决的课题。本文从多种角度分析并提出了承载网扩容和优化的解决方案。     

铁科院高铁快运基地平面布置方案研究

随着现代科技的不断进步、高铁网络的逐渐完善和电商物流的快速发展,高铁快运的市场前景愈加广阔。为将铁科院高铁快运基地打造成国家级示范与创新中心,对其平面布局进行研究。从土地利用、公路接驳等方面分析选址方案,推荐于环线东南侧布置物流基地;按照功能定位设计分区方案,将基地划分为科研创新区、装卸区及停车区;依据物流设施与设备的配置情况,提出两种布局方案,经综合比选,推荐在初期设置大型仓库,以适应高铁快运的发展需求,并更好地发挥引领示范作用。     

浅谈感应电压对高压验电器启动电压的影响

2002年以来，丰台供电段丰西变电所、开闭所发生如下两件性质相同的问题。①2002年5月23日丰西变电所执行218KX停电命令，丰西开闭所222DL断开后，丰西开闭所值班员进行验电、接地线，用27．5kv声光验电器验电时，验电器发出声光，给出有电信号，值班员未立即接地线。后经确认丰西变电所218KX确已停电。当时列为原因不明。     

寒区柴油机拉缸事故综合分析

本文作者曾三次去寒区参加过三种军用战斗车辆柴油机拉缸事故的调查,并参加组织有关发动机专家对拉缸事故的分析讨论。综合分析,得出一些重要的体会,向新研制发动机的设计者们提出应注意的问题。建议有关部门开展寒区起动和使用的课题研究。     

拼装式涵洞施工中高温冻土地基温度场研究

基于对清水河地区拼装式涵洞试验工程地基温度的变化进程的监测,考虑了涵洞基础混凝土灌注后的水化热影响,分析了冻土活动层中温度变化和水热的运输,研究了一个冻融循环过程中高温冻土地基温度场的变化规律,为涵洞的设计、施工、维护加固提供参考.     

Nonlinear Statistical Process Monitoring Based on Control Charts with Memory Effect and Kernel Independent Component Analysis

A novel nonlinear combination process monitoring method was proposed based on techniques with memory effect (multivariate exponentially weighted moving average (MEWMA)) and kernel independent component analysis (KICA). The method was developed for dealing with nonlinear issues and detecting small or moderate drifts in one or more process variables with autocorrelation. MEWMA charts use additional information from the past history of the process for keeping the memory effect of the process behavior trend. KICA is a recently developed statistical technique for revealing hidden, nonlinear statistically independent factors that underlie sets of measurements and it is a two-phase algorithm: whitened kernel principal component analysis (KPCA) plus independent component analysis (ICA). The application to the fluid catalytic cracking unit (FCCU) simulated process indicates that the proposed combined method based on MEWMA and KICA can effectively capture the nonlinear relationship and detect small drifts in process variables. Its performance significantly outperforms monitoring method based on ICA, MEWMA-ICA and KICA, especially for long-term performance deterioration.     

添加稀土元素对硬质合金物理机械性能和切削性能的影响

本文研究了稀土元素的添加种类和添加量对ＹＴ１５硬质合金物理机械性能和切削性能的影响。研究结果表明，添加稀土元素后硬质合金刀片的抗弯强度以及刀具耐用度等显著提高；添加Ｓｍ，Ｙ，ＳｍＰｒ效果较好，并且添加量存在一量佳范围，本文还对添加稀土元素后硬质合金的改机理作了探讨。