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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. 相似文献
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虚拟技术的最新进展为网格计算提供了封装资源的新方式,其封装性、隔离性和安全性能够有效屏蔽底层资源的异构性,根据用户应用需求定制执行环境,更好地适应于网格环境的复杂性和应用的多样性。为了满足当前服务网格的需求发展,基于新的虚拟机技术,研究适合于服务网格的虚拟环境部署运行管理系统,该系统为用户提供可视化、易操作的远程虚拟环境部署和运行管理功能;并实现一个标准的网格服务,结合服务网格平台CROWN,该服务可根据用户应用的特定需求动态透明地部署虚拟执行环境,并根据资源状态自适配调度执行用户任务。并对系统进行了实验分析,实验结果验证了系统的良好可用性和运行性能。 相似文献
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With the development of policy management systems, policy-based management has been introduced in cross-domain organization collaborations and system integrations. Theoretically, cross-domain policy enforcement is possible, but in reality different systems from different organizations or domains have very different high-level policy representations and low-level enforcement mechanisms, such as security policies and privacy configurations. To ensure the compatibility and enforceability of one policy set in another domain, a simulation environment is needed prior to actual policy deployment and enforcement code development. In most cases, we have to manually write enforcement codes for all organizations or domains involved in every collaboration activity, which is a huge task. The goal of this paper is to propose an enforcement architecture and develop a simulation framework for cross-domain policy enforcement. The entire environment is used to simulate the problem of enforcing policies across domain boundaries when permanent or temporary collaborations have to span multiple domains. The middleware derived from this simulation environment can also be used to generate policy enforcement components directly for permanent integration or temporary interaction. This middleware provides various functions to enforce policies automatically or semi-automatically across domains, such as collecting policies of each participant domain in a new collaboration, generating policy models for each domain, and mapping specific policy rules following these models to different enforcement mechanisms of participant domains. 相似文献
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本文从网络环境下客户对售后评价系统的特点、设计、应用和测试方面介绍了该系统的设计与开发。该系统的数据库是SQLServer,采用ASP语言进行设计,以完成客户对售后评价系统的管理。该系统包含:客户评价的收集,结果的汇总、统计,并自动生成报表数据。并根据数据生成Excel文档,从而每个产品,每月和全年的数字统计一目了然。 相似文献
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开发了一种基于虚拟仪器的星上热控回路阻值测试系统。该系统在NI PXI硬件平台下集成了数字万用表和矩阵开关模块,在LabVIEW平台下开发了测控软件。系统通过控制开关切换实现了120个接入点的热控回路绝缘及阻值的快速自动测试,同时具备测试数据管理、报表生成等功能,与标定电阻的对比表明检测结果精确可靠,相对误差小于1%。实际应用表明,该系统集成度高,使用灵活,可极大提高检测效率,节约时间约80%,具有较高工程应用价值。 相似文献
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Dynamic workload balancing of parallel applications with user-level scheduling on the Grid 总被引:1,自引:0,他引:1
This paper suggests a hybrid resource management approach for efficient parallel distributed computing on the Grid. It operates on both application and system levels, combining user-level job scheduling with dynamic workload balancing algorithm that automatically adapts a parallel application to the heterogeneous resources, based on the actual resource parameters and estimated requirements of the application. The hybrid environment and the algorithm for automated load balancing are described, the influence of resource heterogeneity level is measured, and the speedup achieved with this technique is demonstrated for different types of applications and resources. 相似文献
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Rafael Rieder Alberto Barbosa Raposo Márcio Sarroglia Pinho 《Journal of Visual Languages and Computing》2010,21(3):136-156
This work presents a methodology to formally model and to build three-dimensional interaction tasks in virtual environments using three different tools: Petri Nets, the Interaction Technique Decomposition taxonomy, and Object-Oriented techniques. User operations in the virtual environment are represented as Petri Net nodes; these nodes, when linked, represent the interaction process stages. In our methodology, places represent all the states an application can reach, transitions define the conditions to start an action, and tokens embody the data manipulated by the application. As a result of this modeling process we automatically generate the core of the application's source code. We also use a Petri Net execution library to run the application code. In order to facilitate the application modeling, we have adapted Dia, a well-known graphical diagram editor, to support Petri Nets creation and code generation. The integration of these approaches results in a modular application, based on Petri Nets formalism that allows for the specification of an interaction task and for the reuse of developed blocks in new virtual environment projects. 相似文献
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随着虚拟化技术的成熟,虚拟的计算机硬件环境可以执行真实物理计算机的所有操作指令,为了节省投资及服务器管理的方便,虚拟服务器在各个领域都得到广泛的应用。但虚拟服务器受到损害的最常见原因依然是突然掉电,在配备UPS的情况下,若长时间断电,由于UPS电量不足依然会造成虚拟服务器的崩溃。通过在虚拟服务器上监听市电的情况,当UPS电量不足时主动关闭系统,诊断服务程序轮询虚拟服务器,当没有回应时执行开机命令,甚至发送短信和邮件给管理员,实现了虚拟服务器在断电时的自我保护及恢复供电后自动开机的智能管理。 相似文献
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目前,网格环境下,按网格用户的要求对网络进行配置需要由网格管理员与网络管理员协同完成.仅当网格管理员要求网络管理员进行网络配置时,网络管理员才会进行相应的配置.这种手动机制延长了网络配置的时间,增加了网格管理员和网络管理员的负担.对基于策略的网格管理和基于策略的网络管理进行了研究,并在此基础上提出了一个自动网络配置的模型.该模型可将网格策略自动转换成网络策略,最终实现网格环境下网络的自动配置. 相似文献
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The grand vision of model-driven development and model-driven architecture (MDA) is to generate automatically an implementation from a high-level model of the application. The primary ingredients of model-driven development are a platform-independent model (PIM) of the application and a platform-specific model (PSM) which is derived from the PIM for a given target platform. The transformation from PIM to PSM could be done automatically if necessary mappings are defined. Even if this grand vision were to be realized sometime in the future, the evolution of applications developed in this way still poses interesting challenges. We point out specific problems that arise when evolving an application to support different platforms and different technologies. We then propose a supporting tool called a "portability checker" that can help the application developer in evolving applications developed using MDA. 相似文献
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燃油调节器防喘装置是实现发动机工作过程中控制发动机主燃烧室主、付油路供油的执行装置;为燃油调节器防喘试验装置设计的测控系统实现了试验过程的自动化;该系统采用面向对象的原理和虚拟仪器技术设计。集成数据处理、数据库、自动控制等技术,在高速计算机环境下,实现对防喘试验器性能参数的采集、存储、监测、数据处理、分析、控制、报表输出及试验数据管理,具有对试验全过程的分析处理能力;系统在试验台的应用实践表明,操作使用简便、控制准确、测试精度高、完全满足生产试验的要求。 相似文献
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系统集成中程序自我更新解决方案 总被引:1,自引:0,他引:1
介绍了一种在多层体系结构下,客户端应用程序智能地自我更新的解决方案。该方案有效地实现了系统集成过程中客户端应用程序版本的自动更新,从而达到应用程序集中控制和统一管理的目的。 相似文献
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针对传统的应用软件用户界面开发方法存在的可修改性与可重用性差等一系列问题,提出了一种基于XML的通用界面自动生成模型-GIAGM。该模型主要包括界面配置、界面定制、界面生成、界面控制和用户界面管理机制。研究工作实现了基于XML的可通用界面动态生成系统,应用该系统不仅可使应用软件界面的开发更加简单快捷,而且易于维护。最后通过实例介绍了该界面自动生成系统有着良好的扩展性及定制功能,并且也可减少界面开发上的复杂性,提高开发效率。 相似文献