解决动力保障及传统监控系统难题的利器——艾默生新一代Siteweb系统

通信行业的激烈竞争及"客户至上"的承诺和社会责任,对通信网的动力保障质量提出了越来越高的要求。10多年来,作为动力网保障手段之一的动力环境集中监控管理系统的可用性和有效性没有得到实质性的提高。艾默生公司经过5年的市场调查和3年的研发,推出的新一代Siteweb系统成功解决了传统监控系统本身及客户应用方面的难题,树立了行业的标杆,很多技术都高于行业规范的技术要求,是解决动力保障及传统监控系统难题的利器。     

An integrated knowledge representation scheme and query processing mechanism for fault diagnosis in heterogeneous manufacturing environments

An integrated fault diagnosis system was developed for manufacturing complex products, e.g., automobile, that undergo a variety of production processes. The proposed global knowledge representation scheme is designed to consistently express such heterogeneous diagnostic knowledge in terms of the causal relations among relevant attributes across different processes. This scheme is unifying in that it reflects the fact that an effect for one causal relation may in turn be a cause for another along a chain of subsequent processes. In order to unify independent pieces of causal relation, specific attributes of machine-processed products in addition to the usual diagnostic signals such as noise and voltage of the machines. The accompanying probabilistic diagnosis mechanism can then produce an enhanced diagnostic accuracy over other existing schemes as it can simultaneously consider multiple causes of a fault along with their interdependency. The proposed diagnosis mechanism was implemented in a distributed computer environment to identify the functions and procedures required for its actual application.     

A collaborative design appraisal system for water treatment engineering projects

Water treatment projects usually involve large capital investment. Design appraisal is crucial to ensure project quality and cost effectiveness. The aim of design appraisal is to give the design team an opportunity to evaluate a proposed solution at the design stage when the benefits for change are high and cost is low. Design appraisal is a collaborative decision-making process that requires good communication and knowledge sharing between all the team members. Unfortunately, at present in practice there are many communication bottlenecks that result in decisions being made without proper evaluation and appraisal. The paper describes the development of a collaborative design appraisal system, which facilitates a remotely located design team to work in collaboration, carry out what-if analysis and optimise the design of water treatment projects.     

挠性基板制造工艺

应用于IC封装(Integrated Circuit,集成电路)的FPC(Flexible Printing Circuit,挠性印制板)称为挠性基板。随着电子产品向高密度、小型化、高可靠性方向发展,挠性基板线路制造工艺也从传统的减成法发展到半加成法,同时,一些新型的薄型挠性基板及埋嵌器件挠性基板也逐渐应用于航天、医疗及消费类电子等领域[1]。     

Joint utility function-based scheduling for two-way communication services in wireless networks

A type of joint utility function-based scheduling is proposed for two-way communication services in wireless networks. The scheduling of uplink and downlink services is done jointly so that the base station selects a user efficiently and fairly while considering the channel state of both the uplink and the downlink. Because a user generally has two communication links, an uplink and a downlink, the overall satisfaction with a communication service can be formulated as the sum of the quality of the uplink and downlink services. However, most of the previous types of scheduling for the uplink and downlink were designed separately and independently. This paper proposes a joint scheduling algorithm for integrated uplink and downlink services: a base station selects a user while simultaneously considering both the uplink channel state and the downlink channel state. An analytical model is developed for the purpose of determining the scheduling metric, the system throughput, and the level of fairness. The numerical and computer simulation results show that in comparison with conventional proportional fair scheduling the proposed joint scheduling achieves a better throughput while satisfying the fairness among users.     

Impact of node distance on selfish replica allocation in a mobile ad-hoc network

Many data replication techniques have been proposed to minimize performance degradation caused by network partitioning in a mobile ad-hoc network. Most of them assume that all mobile nodes collaborate fully in terms of sharing their memory space. However, in reality, some nodes may selfishly decide to only cooperate partially, or not at all, with other nodes. Recently, a new approach to selfish replica allocation has been proposed to handle node selfishness. However, there is still much room for improvement. We empirically observe that the previous selfish replica allocation strategy suffers from long query delay and poor data accessibility, because it utilizes only non-selfish nodes that may be faraway nodes. In this paper, we propose a novel replica allocation strategy in the presence of selfish nodes, that takes into account both selfish behavior and node distance. Moreover, through a novel node leveling technique, we utilize the memory space of all connected nodes, including selfish nodes. The conducted simulations demonstrate that the proposed strategy outperforms existing replica allocation techniques in terms of data accessibility, query delay, and communication cost.     

皮带系统综合测控分析

利用西门子S7300可编程控制器,对皮带系统进行功能整合自动化改造,使其具备远程控制、多皮带自动化配料控制、皮带物料测重功能;控制皮带自动校验装置进行动态过程校验,皮带的过铁检测和控制,实现皮带驱动的综合保障功能;与上级控制网络通讯,保障了皮带系统的安全运行,提高了系统的智能化控制水平。     

钢铁联合企业燃气系统边际效益回收最大化的探索与实践

可燃气是钢铁联合企业中重要的能源介质之一。某年产钢坯970万t沿海钢铁厂,发挥管理理念和设备优势,利用双气柜并网运行、高炉例修热电同步减烧高炉煤气降低放散、焦炉煤气制氢外销、煤气冷凝水用于炼钢闷渣等方法,实现燃气系统的"减量化、资源化、再利用"的运行模式,逐步实现边际效益回收的最大化。     

钢铁联合企业焦炉煤气高附加值利用技术

焦炉煤气是一种宝贵的资源,可成为钢铁联合企业新的利润增长引擎.文中介绍了焦炉煤气用于制氢、高炉喷吹、制甲醇等高附加值利用技术,可为钢铁联合企业焦炉煤气进一步开发利用提供参考.     

一种基于模式的服务整合优化框架研究

现代服务系统日渐呈现出开放式、整合化和规模化的趋势,研究新特征下整合服务设计和运营的系统化优化方法具有重要意义。探讨服务模式的概念和基本性质,进而提出一种基于模式的服务整合优化框架。结合按需服务的生命周期,识别框架中所包含的若干关键问题,并给出利用服务模式进行服务整合优化的基本过程及几个关键问题的相互关系,为考虑需求规模、服务容量、服务不确定性和收益优化等服务价值特性的领域服务整合优化提供指导。