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文章介绍了一种将三菱FX2N通过编程口协议接入全矿井综合自动化工业以太网、实现三菱FX2N控制系统在全矿井综合自动化系统中的远程通信的方法,该方法克服了煤矿控制系统中三菱FX2N无法实现远程通信的缺点。通信测试表明了该方法的可行性。 相似文献
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工业以太网在全矿井综合自动化系统中的应用 总被引:7,自引:2,他引:7
阐述了全矿井综合自动化系统在煤矿应用的必要性,介绍了全矿井综合自动化系统的三层体系结构及工业以太网在全矿井综合自动化系统中的应用。 相似文献
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KJ95N型安全监测系统接入GEPON全矿井综合自动化系统的方法 总被引:1,自引:1,他引:0
介绍了GEPON全矿井综合自动化系统和KJ95N型安全监测系统的传统传输方式;结合靖远煤业集团有限责任公司大水头矿的实际使用情况,重点介绍了将KJ95N型安全监测系统接入到GEPON环网中的方法。通过GEPON将煤矿安全监测系统融入到全矿井综合自动化系统中,可以节省投资、便于管理,实现了信息共享,同时使全矿井综合自动化更具体完整。 相似文献
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针对煤矿地面变电站自动化系统提供的CDT接口难以接入全矿井综合自动化系统的难题,提出了一种采用组态王KingView软件将CDT接口转换成OPC接口,从而将电力监测系统接入到全矿井综合自动化系统软件平台的方法。 相似文献
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阐述了在全矿井综合自动化系统平台下OPC接入组件的设计,从而简化了工程实施过程中子系统接入的操作,并提高工程服务的效率。 相似文献
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Dave Nowlan 《办公自动化》2008,(5):58
Dialogic Pro服务部门努力地为面向全球移动和固网运营商创建产品或服务的客户们提供全系列的支持服务。最近对服务产品进行了重组来更好地满足客户的需求。目前针对两个级别的服务(高级和标准)提供两种类型的服务协议(服务协议和单设备支持计划)。 相似文献
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Dave Nowlan 《办公自动化》2008,(10)
Dialogic~Pro~(TM)服务部门努力地为面向全球移动和固网运营商创建产品或服务的客户们提供全系列的支持服务。最近对服务产品进行了重组来更好地满足客户的需求。目前针对两个级别的服务(高级和标准)提供两种类型的服务协议(服务协议和 相似文献
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In the world of large‐scale applications, software as a service (SaaS) in general and use of microservices, in particular, is bringing service‐oriented architectures to a new level: Systems in general and systems that interact with human users (eg, sociotechnical systems) in particular are built by composing microservices that are developed independently and operated by different parties. At the same time, SaaS applications are used more and more widely by enterprises as well as public services for providing critical services, including those processing security or privacy of relevant data. Therefore, providing secure and reliable service compositions is increasingly needed to ensure the success of SaaS solutions. Building such service compositions securely is still an unsolved problem. In this paper, we present a framework for modelling, validating, and ranking secure service compositions that integrate both automated services as well as services that interact with humans. As a unique feature, our approach for ranking services integrates validated properties (eg, based on the result of formally analysing the source code of a service implementation) as well as contractual properties that are part of the service level agreement and, thus, not necessarily ensured on a technical level. 相似文献
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基于ITIL体系的安全服务级别管理研究 总被引:3,自引:0,他引:3
通过引入IT服务管理的理念,将安全运营管理定位为IT基础设施库ITIL中的服务,同时综合借鉴BS7799、NIST SP800系列以及其它有关信息安全标准的特点,构建基于ITIL的网络安全运营管理体系,帮助解决安全运营管理平台相关技术和产品的研究开发过程缺乏标准和规范的问题.服务级别管理是基于ITIL的网络安全运营管理体系保证安全服务达到组织或客户的期望并获得认可的关键,是基于安全服务级别协议的协商、定案、监控、报告和总结的过程.详细阐述了安全服务级别管理的相关概念、流程以及与安全运营管理体系其它过程间的关系. 相似文献
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In diverse and self-governed multiple clouds context, the service management and discovery are greatly challenged by the dynamic and evolving features of services. How to manage the features of cloud services and support accurate and efficient service discovery has become an open problem in the area of cloud computing. This paper proposes a field model of multiple cloud services and corresponding service discovery method to address the issue. Different from existing researches, our approach is inspired by Bohr atom model. We use the abstraction of energy level and jumping mechanism to describe services status and variations, and thereby to support the service demarcation and discovery. The contributions of this paper are threefold. First, we propose the abstraction of service energy level to represent the status of services, and service jumping mechanism to investigate the dynamic and evolving features as the variations and re-demarcation of cloud services according to their energy levels. Second, we present user acceptable service region to describe the services satisfying users’ requests and corresponding service discovery method, which can significantly decrease services search scope and improve the speed and precision of service discovery. Third, a series of algorithms are designed to implement the generation of field model, user acceptable service regions, service jumping mechanism, and user-oriented service discovery.We have conducted an extensive experiments on QWS dataset to validate and evaluate our proposed models and algorithms. The results show that field model can well support the representation of dynamic and evolving aspects of services in multiple clouds context and the algorithms can improve the accuracy and efficiency of service discovery. 相似文献
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分布式服务级管理系统模型与实现 总被引:3,自引:0,他引:3
为了在Internet范围内有效地管理端到端应用服务,服务的可用性和服务的性能,保证为用户提供良好的网络服务,提出了一种分布式服务级管理系统模型,它能跨越不同管理域有效地实现服务级管理要求,在管理域之间采用基于XML的合同文本格式-SlaXML,来描述并传递服务一致性信息,为服务系统提供了较强的灵活性和可扩展性。 相似文献
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Quality of service for workflows and web service processes 总被引:14,自引:0,他引:14
Jorge Cardoso Amit Sheth John Miller Jonathan Arnold Krys Kochut 《Journal of Web Semantics》2004,1(3):281-308
Workflow management systems (WfMSs) have been used to support various types of business processes for more than a decade now. In workflows or Web processes for e-commerce and Web service applications, suppliers and customers define a binding agreement or contract between the two parties, specifying quality of service (QoS) items such as products or services to be delivered, deadlines, quality of products, and cost of services. The management of QoS metrics directly impacts the success of organizations participating in e-commerce. Therefore, when services or products are created or managed using workflows or Web processes, the underlying workflow engine must accept the specifications and be able to estimate, monitor, and control the QoS rendered to customers. In this paper, we present a predictive QoS model that makes it possible to compute the quality of service for workflows automatically based on atomic task QoS attributes. We also present the implementation of our QoS model for the METEOR workflow system. We describe the components that have been changed or added, and discuss how they interact to enable the management of QoS. 相似文献
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卫星综合信息网服务级管理的研究 总被引:1,自引:0,他引:1
卫星综合信息网是一种天地一体化网络,是卫星通信与传统网络技术融合的必然发展趋势.空间中的卫星以及星地通信链路都是高成苯的网络资源,如何充分利用有限的网络资源、保证服务质量则是研究这类网络时必须考虑的问题.本文为解决这一问题,提出了卫星综合信息网服务级管理的体系结构,并着重对服务拓扑管理、服务一致性管理进行了深入的研究,同时概括性的提出了服务安全管理和服务故障管理的模型.文章最后建立了卫星综合信息网服务级管理演示验证系统,对文中提到的服务拓扑算法的有效性进行了验证. 相似文献
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现有的P2P网络服务缺乏服务质量保证,很难应用于商业领域.将服务质量属性引入P2P网络服务,提出了P2P网络中服务组合模型,并且给出一个基于服务质量的P2P服务组合计算方法.然后提出一种拉格朗日松弛法算法,给出了满足用户服务水平协议的服务组合求解步骤.实验结果表明,提出的拉格朗日松弛法求解P2P服务组合计算的模型有良好的时间性能. 相似文献