基于窄带物联网路灯控制系统的设计与实现

针对我国目前路灯覆盖面积大,管理手段落后,无法根据实际需要进行远程控制开关灯时间、无法监测各路灯的运行状况等问题,设计一种基于窄带物联网路灯控制系统方案,实现对路灯按需控制、及时了解各路灯的耗能情况,并综合现场的人流量情况,实现精确控制,最终达到节约能源的目的。该终端采用意法半导体STM32芯片为微控制核心、以窄带物联网技术为传输方式、以天翼云平台为支撑的系统总体框架,阐述了系统硬件、软件设计思路,制定了路灯控制器、天翼云平台、后台服务系统之间的通信协议,实现了路灯控制器、云平台、后台服务终端三者之间的信息交互。测试及应用结果表明,该控制器系统稳定可靠,数据通信实时性好,为将来路灯节能控制和管理提供了有利的保障。     

基于NB-IoT的城市智慧路灯监控系统设计

针对路灯系统不方便管理的问题,提出一种基于NB-IoT的城市智慧路灯监控系统方案,实现对城市路灯的控制精准化、监控智能化、故障检修便捷化.给出了系统由数据采集层、信息汇聚层、无线通信层和应用服务层组成的总体框架,阐述了路灯控制终端的硬件、软件设计思路,重点阐述了路灯控制终端与IoT云平台的接口协议.测试结果表明,系统可稳定运行且数据传输稳定性高,降低了传统路灯控制终端的成本和能耗,实现了客户端远程对城市路灯的监控与管理,具有很好的应用前景.     

基于LoRa和STM32的路灯自动监控系统的研究

如今大部分地区的路灯系统还处在传统控制方式、现场人工巡检、传统电路故障排查、没有统一管理平台等阶段,从而造成了巨大的能源浪费.针对以上现状,设计了一种基于LoRa和STM32的路灯自动监控系统.系统以STM32系列的MCU为核心处理器,通过4G通信网络实现路灯与后台服务器之间的数据传输,采用L o Ra级联组网方式,设计有蓝牙接口,方便用户现场维护及参数设置.系统主要功能有路灯状态实时监测与控制、实时智能调光、地理位置检测、环境信息数据采集、故障信息实时检测与报警、电量信息实时检测与预警等.实验结果表明,该系统稳定可靠,数据采集准确,能广泛应用于路灯系统中,为社会节约电能,能有效地提高路灯科学管理水平,提升路灯所在地区的形象.     

基于微服务架构的智慧党建平台设计

为了解决智慧党建平台系统功能复杂、开发维护成本高、可靠性和可扩展性低的问题,提出了基于微服务架构的设计方案,将系统模块功能拆分成微服务。平台采用开源的Spring Cloud微服务框架,实现了服务注册与发现、路由网关、容错处理以及负载均衡等技术,降低了系统的耦合性,提高了开发速度以及使平台部署和扩展更加灵活。该平台目前响应迅速,运行稳定,验证了基于微服务架构设计理念的有效性。     

基于NB-IoT技术的低功耗智能路灯系统设计

在碳中和背景下,城市道路照明系统节能要求越来越高,为实现城市路灯照明系统智能化节能目的,设计一种基于NB-IoT技术的低功耗智能路灯控制系统。单灯控制器以低功耗的ATMEGA32作为核心控制器,采用BC53-G实现运营商网络与路灯监控平台的双向通信,融合光照传感器、温度传感器以及监控平台的开发等实现了路灯系统的自定义控制、智能控制等,结合系统监控平台可以实现系统的断电保护、故障信息自动上报以及路灯节点的电压、电流、功率等数据采集等,达到了无人化智能管理需求。并在此基础上通过系统低功耗优化设计以及结合节能管理方案有效降低了电能损耗,经过运行测试,该系统在半节能模式下较正常模式下节约功耗达46%,根据系统控制平台的要求运行稳定,节能效果明显,具有可推广性。     

微服务架构在电动汽车智能充电服务与运营平台系统中的应用

随着微服务技术的兴起和发展,越来越多的应用系统采用了微服务架构来实现对外服务。描述了微服务框架在电动汽车智能充电服务与运营平台中的应用,并介绍了一种适用于微服务的开发框架。该框架基于轻量级开源微服务框架组件Spring Cloud,其提供一系列的微服务基础设施进行支撑,对电动汽车充电服务运行平台中各组成结构都提供快速简单微服务组件,以提高系统开发效率,降低业务之间耦合度,实现系统的技术隔离、高性能并发处理、独立分布式部署运行、灰度发布、服务降级等,大大提高了电动汽车充电服务运营平台的高效性。     

基于PACSystems RX3i的路灯智能控制系统研究与开发

针对当前大多数路灯管理和控制上存在的问题,采用美国通用电气智能平台PACSystems RX3i作为控制器开发设计路灯智能控制系统,并通过路灯模型系统实践证明,该系统能达到路灯自动监控、节约能源、减少排放,实现绿色照明的目的,可进一步提高城市照明质量,改善城市人居环境.     

基于微服务架构的统一应用开发平台

随着信息化时代的发展,业务系统越发庞大复杂,系统开发及维护面临着巨大的挑战. 针对这一问题,提出基于微服务架构的统一应用开发平台,重点介绍了平台的微服务架构设计、基于平台的业务系统实现. 通过引入微服务构建和分布式服务注册等相关技术,平台实现了生成微服务工程的标准开发框架,解决传统单体架构应用庞大而带来的研发周期长,难以快速响应用户需求等问题,为业务系统的开发提供了有效支撑.     

MSA-Lab：模型驱动的微服务集成设计平台

从单体系统迁移到微服务系统是当前业界对遗留系统实施再工程化的主流选项之一,基于单体遗留系统的微服务体系架构重构则是实现该迁移的关键步骤.目前学界多集中在微服务识别方法的研究上;业界虽有许多面向微服务架构的遗留系统重构的实践,但缺乏系统性的方法及高效鲁棒的工具.鉴于此,在微服务识别与模型驱动开发方法前期研究的基础上,研发一种模型驱动的、可用于单体遗留系统微服务化重构的集成设计平台MSA-Lab.它通过分析单体遗留系统运行日志中的方法调用序列,对其中的类和数据表进行类型识别和聚类以构造抽象微服务,同时生成包括微服务图和微服务序列图在内的系统架构设计模型.它包括用于微服务自动识别与设计模型自动生成的核心部件MSA-Generator,以及用于微服务静态结构模型与动态行为模型可视化展现、交互式建模、模型语法约束检验的核心部件MSA-Modeller.在MSA-Lab平台上,通过对4个开源项目实施有效性、鲁棒性、功能转换完备性等实验以及对3个同类型工具实施性能对比实验,结果表明:所提平台拥有很好的有效性、鲁棒性及实现面向日志的功能转换完备性,且性能更加优越.     

云环境中Web应用的微服务架构评估

云计算为我们提供了一种全新、高效的方式来部署可扩展的Web应用,这种方式使企业的应用可以按需对计算资源进行分配.微服务架构用于将庞大复杂的应用系统拆分为一系列可独立开发、测试、部署、运行、升级的服务模块.微服务架构为大批互联网企业实现云环境中的应用扩展、降低应用开发复杂度、实现敏捷开发提供了更加有效地方法.本文分析并测试了微服务架构模式,通过一个具体案例——在云环境中开发和部署的企业级应用系统,对两种架构模式实现（单体架构模式和微服务架构模式）进行性能测试,得出评估结果,这些结果对解决企业级应用微服务化中可能遇到的问题具有一定指导意义.     

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.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

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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