加强电炉钢短流程生产工艺研究与技术开发的建议

论述了加强电炉钢短流程生产工艺研究与技术开发的必要性和主要课题，并提出关于组织合金钢短流程生产工艺研究与技术开发“九五”国家科技攻关及提高高研究开发投资强度的建议。     

Relationship of threshold diameter and Darcean permeability in unconsolidated porous structures

Experiment was conducted on the threshold pressure for atmospheric air through unconsolidated narrow size distributed mini sphere and sand particles at low flow rates. The threshold diameter calculated from measured threshold pressure showed that it does not follow the traditional similarity theory. This is consistent with our experiment on accurate permeability measurement, and can be explained as a result of gas slip flow within such micro pore structure. Our current work tend to find the method to predict the permeability-threshold pressure relationship for unconsolidated porous structures.     

基于UML的面向对象方法的研究与应用

传统的软件开发方法存在软件重用性差、可维护性差、生产效率低等弊端.为了满足用户的需求,采用面向对象方法势在必行.通过对UML建模和PUP思想进行综合研究,开发了一个基于UML的面向对象软件开发方法的小型物流管理系统.并对系统体系结构分析、需求分析、概要设计等作详细的介绍.     

高速公路联网系统车道收费软件的设计与实现

通过对当前常用的车道收费软件的分析对比,提出了一种基于Mini Server战术的车道收费软件的体系结构,并就其实现技术及性能特点进行了详细的论述,还对Mini Server控制下多Agent通信策略等方面进行了较深入的描述。     

地理信息的超图时空数据挖掘

论文主要研究了在超图模型的支持下,基于Arcinfo的完全关系地理型数据库Geodatabase,建立面向属性归纳的地理信息超图时空数据挖掘方法。     

基于Honeynet的网络入侵模式挖掘

随着互联网的扩张和基于互联网应用的发展,网络安全越来越受到人们的关注。网络入侵的检测和防范也越来越受到人们的重视。构建一个安全的网络,就要对攻击者的行为模式和攻击手段进行分析。该文提出了一个基于Hon-eynet的网络安全系统,通过Honeynet中的机器收集攻击者的有效信息,然后使用数据挖掘算法从这些数据中找出入侵者的攻击模式,从而提高入侵检测系统和防火墙的检测和防范能力。     

In situ observation of phosphorous and non-phosphorous antiwear films using a mini traction machine with spacer layer image mapping

Since 1940s the principal source of an antiwear additive in crankcase applications has been due to a family of additives known as zinc dialkydithiophosphate (ZDDP). In this study, we have applied a novel technique, the mini traction machine with spacer layer image mapping (MTM SLIM), to study film formation characteristics of monoblend oils containing only basestock and ZDDP and also fully forrmulated oils containing a boron antiwear additive. The purpose of this study was initially to understand the build up of ZDDP film and then to establish whether boron compounds alone could provide significant antiwear films under mixed rolling and sliding contact.     

Reduction of the sheet thickness variation and its negative effects on the accuracy of mini drawn parts using different geometries of tool components

Like in the case of macro deep drawing, the sheet thickness of mini drawn parts, with dimensions smaller than 20 mm and made from very thin sheets, is unevenly distributed and varies from minimum values resulted in the zone of part edge radius to maximum values in the upper zone of part vertical walls. Such variation of sheet thickness can cause for the resulted drawn parts some geometric deviations from their theoretic geometry or it can determine the parts failure. Hence, the main objective of the mini scale deep drawing processes is to obtain an increased accuracy by reducing the sheet thickness variation, or in other words to minimize the values of sheet thinning and thickening. The present paper analyses the results of investigations made by experiment and simulation concerning the use of different geometries of the tool components that permit to control and minimize the sheet thickness variation in the mini cylindrical drawn part zones where this phenomenon can generate negative effects and determine the part inaccuracy. The new geometries of tools were obtained by modifying the state of stress in the deformed sheet using adequate geometries of active surfaces of the die cavity and blank holder plate.     

Instrumental neutron activation analysis of beachrock samples of South East Coast of Tamilnadu, India

Element profiles of some beach rock samples collected from South East Coast of Tamilnadu, India have been determined using single comparator method of INAA. The geo-chemical behavior of the elements in the region is discussed. The irradiations were done at thermal neutron flux of ~ 1011 cm-2·s-1 at 20kW power using Kalpakkam Mini Reactor (KAMINI), IGCAR, Kalpakkam, Tamilnadu, India. Around 19 elements have been determined from 15 samples by high-resolution gamma spectrometry. The accuracy and precision were evaluated by assaying the irradiated Standard Reference Material (SRM 1646a Estuarine sediment) and were found to be in good agreement with certified values.     

小型变电所监控软件的设计

小型变电站的监控软件功能是接收RTU的数据,图示变电站的各监控量数值,通过网络或使用RS232串行口控制调制解调器远程上传至监控中心,并可接收监控中心的指令操作变电站的电闸、预设值设定.从经济实用的角度,说明使用VB的控件数组和Excel表格,设计小型变电所监控程序的一些方法.