油气技术在临钢板坯连铸机上的设计及应用

介绍油气技术在临钢板坯连铸机上的设计选型、应用中遇到的问题及处理方法。采用油气技术后，在实践应用中，摸索了一套成功经验，对油气技术的推广应用有一定的借鉴作用。     

A linear programming approach for multivariable feedback control with inequality constraints

A multivariable control scheme which explicitly includes inequality constraints on the state, control and output variables is developed using a linear programming (LP) formulation. A suboptimal feedback control policy results since the LP calculations are repeated at each sampling instant. A number of important properties related to the LP control problem are obtained from a theoretical analysis. Simulation results illustrate that the on-line computational requirements are modest and that the new LP approach compares favourably with existing methods such as optimal feedback control     

CONFIGURING BOTH BACKBONE AND LOGICAL NETWORKS OF A RECONFIGURABLE NETWORK WITH LINK FAILURES ALLOWED

This paper considers a problem of configuring both backbone and logical networks in a reconfigurable circuit-switched network where links are subject to failures. The objective is to design feasible backbone and logical networks at least cost where the cost includes backbone link capacity expansion cost, lost-call traffic penalty, and hop cost (nodal processing cost). The problem is formulated as a zero-one non-linear mixed integer programming problem, for which a solution procedure is developed by use of a Lagrangean relaxation technique and heuristic methods exploited for improving the lower and upper bounds of any intermediate solution. The solution procedure is tested for its effectiveness with various numerical examples.     

Effect of EHL Contact Conditions on the Behavior of Traction Fluids

New infinitely variable transmission (IVT) systems are under development for the automotive industry as a means to achieving significant fuel economy benefits. These systems rely on the lubricating fluid to transmit the drive train loads across the interface of the transmission components. This requires the development of new fluids that exhibit high traction properties under elastohydrodynamic lubrication (EHL) conditions. However, it has been reported recently that the traction performance of some fluids can reduce dramatically as temperature is reduced. This may place severe operational limits on IVT systems and suggests that the low-temperature traction properties of fluids for these systems should be studied in order to understand the mechanism for the observed reduction in traction.

The work reported here is an experimental study aimed at identifying whether low temperature traction reduction is related to a fundamental change in rheological behavior specific to the fluids tested or to more generic changes in the EHL contact conditions. A series of model experiments were performed using a mini traction machine (MTM) on three high-viscosity polybutene samples. The results have been mapped against previously reported non-dimensional parameters used to identify different EHL regimes. The results show that dramatic reductions in traction occur when the contact transitions from the rigid piezo-viscous (RP) toward the rigid iso-viscous (RI) region. Similar results were also found for two other high-viscosity fluids of different molecular structure and lower traction properties. The results support the hypothesis that the reduction in traction observed at low temperature is due to a change in EHL contact conditions rather than being solely due to a change in the rheological performance of the test fluids.     

聚丙烯的化学改性

介绍了聚丙烯的共聚改性、接枝改性、交联改性、氯化改性四种化学改性方法,比较了这些化学改性方法的优缺点、对聚丙烯性能的改善情况以及研究进展,展望了聚丙烯化学改性的前景。     

国内外C16～18及大于C18高级醇的开发应用

详尽地探讨了C16～18醇和大于C18醇及其衍生物开发利用的现状及进展。提出了高级醇应用开发技术的建议。     

OPTIMAL CONTROL OF WASTEWATER TREATMENT PLANTS VIA INTEGRATED NEURAL NETWORK AND GENETIC ALGORITHMS

The successful operation of wastewater treatment plants involves many uncertain factors. Not only the physical and chemical properties of wastewater streams but also the complexity of biological mechanism would significantly influence the performance of treatment process. Due to the rising concerns of environmental and economic impacts, improved control algorithms, using artificial intelligence technologies, have gradually received wide attention in the scientific community. This paper develops a genetic algorithm-based neural network for the assistance of intelligent controller design. An industrial wastewater treatment plant in Taiwan verified the applicability of such a methodology. The hybrid intelligent control technology applied in this paper is suitable to many other types of wastewater treatment plants by a slightly modified concept.     

混凝土蜂窝的防治措施

概述了混凝土蜂窝对结构的危害。分析了混凝土结构产生蜂窝的原因，提出了防治措施。     

数据库和串口通讯技术在煤质数据处理中的应用

针对目前我国大多数火力发电厂用煤的实际情况和煤质分析中存在的问题,基于数据库技术和串口通讯技术的基本原理,研发了新的分析结果数据处理软件,并将其应用于实际分析工作中,从而实现了煤质分析中从煤样组分的分析、结果的记录与计算、分析报告打印等各项操作程序的自动化,减小了数据分析结果的误差,提高了工作效率,得到了满意的结果.