采用ECharts可视化技术实现的数据体系监控系统

针对如何将大量数据以可视化的形式呈现在用户面前,从而能够更加清晰的传达信息的问题,采用了ECharts可视化技术实现数据体系监控系统.详细描述了该数据体系监控系统的系统设计,并讲述了该系统的具体实现,从而说明了使用ECharts可视化技术以图形化的方式对数据信息进行展示的起着十分重要的作用.     

基于物联网的校园疫情监控系统设计与实现

为减少人员聚集,实现校园疫情防控智能化,设计了一款基于物联网的校园疫情监控系统并予以实现,包括人流量数据采集模块、网络疫情数据采集模块、校园物联网和数据可视化模块,可快速组建物联网平台并实现本地数据和云端数据的同步监控。系统使用STM32F429作为主控芯片,搭配HC-SR501人体红外感应模块、LoRa节点模块,采用双向检测算法实时采集校园内的人流量数据,运用Python网络爬虫实时获取网络疫情数据,并搭建了以LoRa无线通信技术为基础的校园物联网,实现与网络服务器之间的数据传输。针对所得数据,通过软件驱动程序进行清洗并存放至数据库,供人机交互界面调用。对系统功能进行测试后,结果表明前端采集的数据可以实现在现场LCD终端和云端HTML终端的展示,为校园师生提供有效的人流量数据和疫情数据。     

电器试验设备远程监控系统设计与实现

针对现有电器试验设备监控系统的一些缺陷，设计了一种基于Web的远程监控系统，用于实时监控设备运行状况和试验数据。介绍了系统的总体结构和系统功能；根据系统的功能需求设计了数据库，实现了系统对不同类型、不同地点的试验设备的通用化；利用Redis缓存降低了磁盘I/O，提高了系统的响应速度；在保证安全的情况下，实现了对试验设备的远程启停控制；通过WebSocket技术和Redis订阅发布模式，实现了由设备端到客户端的高效数据推送；利用ECharts框架实现了静态和动态试验结果数据的可视化。经测试，系统运行效果符合预期，证明了以上方法的可行性。     

基于SSM框架的社区环境数据可视化系统

为了更高效地对社区的环境数据进行管理和直观的展示,提高社区管理系统的使用效率,该文以PM2.5、O3、SO2等社区的环境数据为对象,基于Spring,SpringMVC和Mybatis框架设计了社区环境数据可视化管理系统.前端以Bootstrap为框架,ECharts作为可视化组件实现系统的主要功能.结果表明,该数据可视化系统具有性能良好、数据展示直观、代码复用率高的特性.     

ECharts在数据可视化中的应用

目前人们在各个领域面对海量数据,需要借助数据可视化技术把海量数据转换为动态图像或图形,并利用交互手段帮助人们进行理解数据,以便完成进一步的数据分析。在教师专业发展领域中鲜有聚焦数据可视化的研究。本文按照可视化的基本流程,探索了基于ECharts平台的可视化开发方法,以教师专业发展数据的可视化系统为例,重点叙述了ECharts图表在客户端的构建方法、交互组件在可视化中的应用,展示了通过Ajax技术实现动态数据绘制的过程。     

基于Bootstrap的数据可视化展示技术

随着大数据技术的不断发展,数据可视化展示的运用越来越广泛.各种Web前端框架和技术融入到数据可视化技术中,使大量复杂的数据经过数据处理之后,通过数据可视化技术展示给用户,辅助用户进行决策分析.通过Web前端技术中应用比较广泛的Bootstrap框架、jQuery与ECharts相结合,研究数据可视化平台的构建与实现.     

第三方软件与监控系统远程数据交互的应用

监控系统已经广泛运用在高效稳定的工业化生产过程中.通过对当前使用的监控系统的调研,发现相当一部分非网络版监控系统的使用人群仅仅会一些基本操作,却无法对系统进行维护.为了能够让系统工程师在远程进行系统维护,设计了一款通用的C/S构架软件,实现了多客户端与监控系统的远程实时数据交互.工程师足不出户就能完成监控系统的参数分析、实时调整、优化等工作,在实际应用中节约了大量的时间和资金.     

基于DDS和WPF技术的试飞实时监控系统设计

针对以服务为中心的客户端服务器(C/S)架构监控模式存在着数据融合困难、传输协议单一、扩展灵活性差等不足,将数据分发服务(DDS)技术引入到试飞实时监控系统中,结合WPF图形引擎技术形成了一整套解决方案。在完全兼容当前架构规范的前提下,采用DDS技术作为数据传输中间件,有效提高了试飞监控系统的实时性,加强了多源数据融合粒度,降低了试验资源的集成难度;采用WPF图形引擎技术构建实时监控可视化编辑平台,最终实现了空天地综合监控环境下多源数据接收、处理、分发以及可视化展示等关键技术。此方案已经在飞行试验地面实时监控中得到了成功应用。     

一种分布式Twitter数据处理方案及应用

针对社交媒体数据的特点及其分析的挑战性,提出了一种基于实时计算框架Storm、批处理框架Hadoop和高效可水平扩展的NoSQL数据库MongoDB的分布式社交媒体数据处理方案,并依此指导实现基于Twitter流式数据的流感疫情可视化分析系统.实验证明,该分布式方案能较好支持Twitter流式数据的高效处理和储存,使之满足系统的性能需求.     

航电1553B总线监控系统的设计与实现

在简要介绍1553B总线通信的基础上,详细介绍了某航电系统1553B总线实时监控分析系统的设计与实现.该系统实现了航电系统1553B总线的可视化配置,总线数据的记录、解释、显示、回放、分析等功能,可应用于航电系统的测试.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate