面向产业链云服务平台的分布式备件库存协同控制方法与软件工具研究

针对制造业产业链协同服务平台的备件业务协作需求,提出跨节点的库存协同解决方案并建立近期需求预测计算模型。结合分布式节点企业的历史交易数据、库存数据的实时采集与处理应用,保障库存控制方案的实效性。采用MapReduce框架对模型参数计算过程进行优化,提高运算速度。基于遗传算法获取模型计算最优解,并将模型计算结果推送至下游经销商企业群,由反馈信息控制订单的动态生成。并将该模式应用在汽车产业链云服务平台,压缩了产业链响应时间。     

面向汽车产业链的云服务平台数据交换研究

针对汽车产业链大规模企业群的多源异构数据交换需求,提出了基于第三方云服务平台的数据交换解决方案。在分析数据交换交互关系的基础上,构建了一套通用的第三方 Web 服务数据交换授权认证机制。为解决数据交换内容动态可变的难题,设计了一套柔性化、动态可配置的数据交换规则框架。通过分析数据交换状态转移模型,研究了云服务平台与整车制造企业的数据交换过程体系。分析了交换过程的数据同步性与一致性问题,并采用算法给出了级联耦合关系数据实体的处理方式,保障了关联数据交换的完整性。应用表明研究成果解决了云服务平台与多源异构数据源的数据交换问题,支撑了汽车产业链大规模企业群的多业务协同信息交互。     

面向产业链协同SaaS平台的业务流程定制技术

针对产业链协同软件即服务(SaaS)平台各企业群对业务流程个性化定制的需求,建立了业务流程与业务功能之间的映射关系和企业群与业务流程之间的定制关系,在此基础上构建了SaaS平台面向多企业群的业务流程定制模型,并提出了业务流程驱动规则和加载控制方法,以实现平台在应用过程中基于用户身份的业务流程动态加载支持。构建的业务流程定制模型和流程驱动规则以及相应的加载方法在汽车零部件产业链售后服务的外出申请审批流程的定制方面进行了应用验证,能实现SaaS平台运行过程中企业群对业务流程的个性化定制需求。     

面向产业链协同SaaS平台的多租户数据加密配置技术研究

针对产业链协同SaaS(software-as-a-service)平台以龙头企业为核心的多租户业务关联特性,并结合其面向企业联盟的独立数据库与共享数据库共享表相结合的数据存储特点,分析了产业链协同SaaS平台以龙头企业为核心的多租户业务数据的安全加密配置需求.通过建立产业链协同SaaS平台的多租户关联模型及面向企业联盟的业务数据加密配置模型,提出了龙头企业业务数据加密配置算法、加密配置元数据驱动的协作企业业务数据加密及提交算法,以及面向龙头企业和协作企业的业务数据查询的解密算法.模型和算法在汽车及零部件产业链协同SaaS平台零部件协同采购订单业务中进行了应用.通过龙头企业的配置,能实现不同联盟的个性化数据加密需求.     

面向云平台中心化集成调度的跨供应商订单分配模型

跨供应商订单分配可以充分发挥云平台优势,有效整合利用各供应商的剩余资源.鉴于此,提出一种云平台主导的集成调度模式,基于该模式和供应商的产能约束、运输约束、订单约束构建面向云平台中心化集成调度的跨供应商订单分配模型,给出基于改进遗传算法的模型求解方法,并通过算例演示所构建模型和算法的有效性.Matlab实验结果表明,订单能够在各供应商间得以科学分配,实现各供应商闲置资源有效利用和成本最优.     

产业链协同SaaS平台多租户权限管理技术

面向汽车及零部件产业链协同SaaS平台的多核网状企业群协同管理需求,在传统的RBAC模型的基础之上,提出一种以龙头企业为核心的多租户多级授权模型,运用菜单动态生成技术、URL地址解析算法实现了权限的解析,有效地控制了用户的访问权限.经验证,提出的模型和实现方法有效解决了产业链协同SaaS平台上多租户的用户权限管理问题.     

面向制造业产业链的集成体系框架研究

针对面向制造业产业链协同的实际需要,在分析了企业群产业链之间合作特点的基础上,构建了产业链协同模型、企业群集成管理模型,提出了面向产业链的集成服务平台框架.该框架实现了在企业群模式下各业务系统的松耦合集成,通过在支持多核网状式企业群协作的售后服务管理系统的开发和实施中的应用,验证了所提供平台模型的可行性和有效性.     

基于物联网技术的汽车零部件追溯信息系统研究

根据汽车模块化生产特征,提出面向模块生产的追溯方法;在零部件批次关系和订单信息系统上构建内外部追溯系统模型;并建立物联网技术集成应用模式及零部件供应商分布式管理系统;实现产品质量的事前控制以及缺陷产品追溯和批次追溯相结合的追溯目标。     

面向设计产业链的需求服务映射及评价算法*

为了满足用户个性化产品设计需求,对接优质设计服务资源,以及提升设计过程中的服务质量,基于云服务平台运行机制开发一种面向设计产业链的需求与服务映射云服务平台。首先根据服务资源描述框架和模糊语义相似度算法,构建设计产业链需求与服务映射模型;其次分析了一些设计公司的需求,提出业务服务协同管理模型;最后利用统计得到服务质量数据,根据线性回归方程计算出服务评价各项指标等。结合实际案例对平台进行应用,并筛选出最优服务方。验证表明,上述算法和模型实现了对需求服务的匹配和设计服务方的客观评价。     

云计算平台中面向车联网应用的能耗感知调度算法

针对面向车联网应用的云计算平台的高能耗问题,提出一种采用节能整合策略的能耗感知调度算法——任务集整合算法(Task Set Consolidation Algorithm)。该算法的主要思想是通过减少活跃物理服务器的数目,有效降低云平台的能量消耗。建立了云平台模型、车联网任务集模型和能耗模型,确定了云平台的节能目标函数和变量因子。仿真实验通过模拟多维资源多并发任务集的云平台环境,以物理服务器的活跃时间和活跃数目、云平台的能量消耗作为性能指标,将任务集整合算法与现有算法进行了比较。实验结果表明,TSC算法能够在避免任务集资源发生冲突的情况下,使面向车联网应用的云平台激活的物理服务器数量达到最少,能耗降到最低。     

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