定量配料实践教学的远程监控系统设计

针对定量配料加工过程粉尘大、噪声大不适合长期监看加工,定量配料实践教学的远程监控系统设计采用了远程计算机MCGS组态软件来监控多台皮带秤配料加工过程。网络控制网关解析MCGS组态软件通过RS485发出的命令,分别监控各台皮带秤稳定工作。网络控制网关采用的是嵌入式ARMLPC2136芯片开发,LPC2136微处理器是高性能、低功耗、高集成度并具有工业级温度范围和性能的微处理器。     

Java程序设计课程教学方案研究

Java是一种行业工具,所以Java程序设计课程成为电子信息类和IT各专业的必修课程,Java也是IT类各种职业从业的必要条件。研究了Java教学方法,提出了在教学过程中少一点Java语法、结构方面的分析研究教学,多一点Java在网络应用中的案例教学,体现Java作为工具的应用功能的教学思路。     

采用大数据分析建设工程市场信息的新方法

随着招投标过程信息化的快速发展,越来越多的招标、评标、中标信息统一集中在相应交易中心平台网站上进行公示,使采用大数据手段分析建设工程信息成为了可能。采用Web Scraper插件爬取网页内容简便、高效、准确。大数据的介入能很大程度遏制非法围标、串标行为,保证公共资源交易过程的公平、公正,有效打击权力寻租。同时大数据分析以定量、可视化的成果展示了建设工程的市场行为趋势,为政府的宏观调控提供更精确的数据性指导性意见。     

Ontological reasoning in the design space exploration of advanced cyber–physical systems

Cyber–physical systems are becoming increasingly complex. In these advanced systems, the different engineering domains involved in the design process become more and more intertwined. Therefore, a traditional (sequential) design process becomes inefficient in finding good design options. Instead, an integrated approach is needed where parameters in multiple different engineering domains can be chosen, evaluated, and optimized to achieve a good overall solution. However, in such an approach, the combined design space becomes vast. As such, methods are needed to mitigate this problem.In this paper, we show a method for systematically capturing and updating domain knowledge in the context of a co-design process involving different engineering domains, i.e. control and embedded. We rely on ontologies to reason about the relationships between parameters in the different domains. This allows us to derive a stepwise design space exploration workflow where this domain knowledge is used to quickly reduce the design space to a subset of likely good candidates. We illustrate our approach by applying it to the design space exploration process for an advanced electric motor control system and its deployment on embedded hardware.     

嵌入式调试中的数据获取和错误定位

嵌入式软件系统因其软件相关性和硬件相关性而比常规软件的调试复杂很多,特别是在数据获取和故障定位方面最为突出。从嵌入式软件开发与常规软件开发的异同着手,以该行业实践积累为基础,列出并讨论了一些行之有效的数据获取及错误定位方法,希望能为该领域开发人员提供一点帮助。     

基于SOPC的嵌入式网络化测控网关设计

为了实现测控设备的网络化远程访问控制,必须设计用于IEEE 488等测控接口总线协议与网络协议转换的网关设备,给出了一种基于SOPC技术的嵌入式网络化测控网关设计方法,其中借鉴了基于组件的模块化设计思想,采用固件分层设计和多语言混合编程模式,能够融合多种测控协议,将LAN、GPIB、USB、RS232等接口集成到了一个系统上,实现了嵌入式web服务器功能,客户端能够基于IE等浏览器实现测控设备的远程访问控制;最后给出了系统综合验证方法,结论表明:系统功能完善,符合网络化、模块化、通用化和智能化的发展方向。     

通用视觉检测设备的专家在线平台设计

针对视觉检测设备在复杂的生产环境下存在图像处理参数设置问题,设计了一套B/S架构的通用的专家在线平台,通过在原有的视觉检测平台上增加一个普通的USB摄像头及相应的应用软件,并通过网络将出现的新问题的图像实时传输给生产厂家或外部专家,由专家通过浏览器设置合理的图像处理参数,平台综合了数据协同、远程培训等功能,达到了远程解决问题的目的。     

SVM-based ontology matching approach

There are a lot of heterogeneous ontologies in semantic web, and the task of ontology mapping is to find their semantic relationship. There are integrated methods that only simply combine the similarity values which are used in current multi-strategy ontology mapping. The semantic information is not included in them and a lot of manual intervention is also needed, so it leads to that some factual mapping relations are missed. Addressing this issue, the work presented in this paper puts forward an ontology matching approach, which uses multi-strategy mapping technique to carry on similarity iterative computation and explores both linguistic and structural similarity. Our approach takes different similarities into one whole, as a similarity cube. By cutting operation, similarity vectors are obtained, which form the similarity space, and by this way, mapping discovery can be converted into binary classification. Support vector machine (SVM) has good generalization ability and can obtain best compromise between complexity of model and learning capability when solving small samples and the nonlinear problem. Because of the said reason, we employ SVM in our approach. For making full use of the information of ontology, our implementation and experimental results used a common dataset to demonstrate the effectiveness of the mapping approach. It ensures the recall ration while improving the quality of mapping results.     

Web Server的嵌入式实现与交互式设计

本文简要介绍了PowerPC硬件平台和基于CentOS的嵌入式Web Server软件架构。分别给出了嵌入式Web Server应用体系结构、主要任务、选型,交互式原理中的两个过程,详尽地分析了GoForms过程与动态信息的XML文件交互。系统通过长时间测试,能够快速设置、查询,而且运行稳定。     

基于ADSP-BF561的视频图像采集系统设计

校本文基于ADI公司BF561的嵌入式处理器,以OV7660 CMOS图像传感器为视频图像输入源,以uClinux为操作系统,采用先进的JPEG2000图像压缩算法,设计了一种视频图像采集系统的实现方案,实现了视频图像的采集,处理及传输。测试结果表明,在上位机端可以看到比较清晰的图像。