Dispersion Constraint Based Non-negative Sparse Coding Model

Based on advantages of basic non-negative sparse coding (NNSC) model, and considered the prior class constraint of image features, a novel NNSC model is discussed here. In this NNSC model, the sparseness criteria is selected as a two-parameter density estimation model and the dispersion ratio of within-class and between-class is used as the class constraint. Utilizing this NNSC model, image features can be extracted successfully. Further, the feature recognition task by using different classifiers can be implemented well. Simulation results prove that our NNSC model proposed is indeed effective in extracting image features and recognition task in application.     

基于J2ME的人力资源管理系统的设计

基于J2ME技术、MVC模式,在手机客户端开发了人力资源管理系统,实现了企业级人力资源管理的移动办公。系统分为服务器端和客户端两部分,服务器端负责接收客户端请求并处理,客户端接收用户请求,并通过MVC模式使得界面和模型数据分离,便于维护。     

基于WinCC Flexible和PLC的高压发泡机控制系统设计

设计以西门子S7-300PLC和MP277 Touch触摸屏为控制核心、具有多种工作模式选择的高压发泡杌控制系统,解决了注射流量比例的精确控制、自动补料、故障报警、压力控制、工艺过程实时监控等问题,实践证明该系统稳定、可靠、易于操作,满足了系统的要求.     

Fuzzy FMEA application to improve purchasing process in a public hospital

Failure mode and effects analysis (FMEA) is one of the well-known techniques of quality management that is used for continuous improvements in product or process designs. While applying this technique, determining the risk priority numbers, which indicate the levels of risks associated with potential problems, is of prime importance for the success of application. These numbers are generally attained from past experience and engineering judgments, and this way of risk assessment sometimes leads to inaccuracies and inconsistencies during priority numbering. Fuzzy logic approach is preferable in order to remove these deficiencies in assigning the risk priority numbers. In this study, a fuzzy-based FMEA is to be applied first time to improve the purchasing process of a public hospital. Results indicate that the application of fuzzy FMEA method can solve the problems that have arisen from conventional FMEA, and can efficiently discover the potential failure modes and effects. It can also provide the stability of process assurance.     

Chord中路由公平性分析及改进

P2P系统中分配及检索目标的路由占据了大多数开销,通过公平性参数(FI)推导出影响路由公平性的因素.根据结论在没有增加任何负载的情况下对Chord finger选择算法进行改进,通过公平性参数(FI)及仿真对改进前后的Chord的公平性进行评估,结果表明改进后的EChord性能有较大提高.     

煤矿调度电话录音上传及远程回放的实现

文章介绍了煤矿现有的调度电话录音系统,设计了调度电话监控上传系统来实现录音文件的上传和调度电话查询系统实现录音文件的查询和远程回放。系统通过输入查询取代了传统的人工查询的工作方式,大大节约了生产调度成本,同时为煤矿人员考勤和定位也提供了准确依据。由于其配置容易、操作方便、实用性高,因此具有很好的维护性和推广性。     

One-dimensional partitioning for heterogeneous systems: Theory and practice

We study the problem of one-dimensional partitioning of nonuniform workload arrays, with optimal load balancing for heterogeneous systems. We look at two cases: chain-on-chain partitioning, where the order of the processors is specified, and chain partitioning, where processor permutation is allowed. We present polynomial time algorithms to solve the chain-on-chain partitioning problem optimally, while we prove that the chain partitioning problem is NP-complete. Our empirical studies show that our proposed exact algorithms produce substantially better results than heuristics, while solution times remain comparable.     

基于JMS的安全通信模型研究与设计

面向消息中间件(MOM)的安全性是目前的一个研究热点,目的是设计确保数据传输完整性的安全机制.通过分析JMS的两种消息通信模型,针对它在安全性方面存在的不足,引入了数字签名和加密技术,提出了一个基于身份验证和混合加密的可扩展安全通信模型,并详细介绍了模型的各个组成部分.模型的基本思想是使用数字签名的信息进行双向身份认证,并且在消息传输的过程中,利用双方协商的会话密钥和非对称加密技术对消息进行加密.最后构建了原型系统对模型进行了验证,实验结果表明此模型提高了基于JMS的系统的安全性.     

飞机分布式配电系统总线监控器的设计

对基于MIL-STD-1553B多路传输数据总线先进飞机的分布式配电系统的结构和功能进行了分析,重点论述了总线监控器的功能及应用软件的设计及实现;配电系统的消息数量多而且传输频率高,因此如何实现实时监控消息是软件设计的关键;采用Windows消息驱动机制和多线程概念,并结合实时内存数据库技术,很好地解决了实时问题;总线通信试验表明,系统运行可靠,达到了功能要求,具有很好的监控效果,可用于分布式配电系统中。