海云创新试验环境测量系统设计与实现

测量系统是海云创新试验环境必不可少的测量与验证手段。本文提出创新试验环境测量系统的总体架构,支持创新试验环境的实现与应用,在此基础上开展系统的框架和功能设计、实现,研究测量数据接口技术、测量控制调度技术、测量数据存储分析技术、试验生命周期管理技术等,为管理者提供试验环境运行状态的监控手段,为试验用户提供试验资源和过程的测量、管理及分析服务,从而提高试验环境的可控性、可用性及安全性。     

城市内涝三维可视化应急管理信息系统

为提升城市防洪减灾能力,通过融合北斗卫星监控、大数据分析、云服务和综合集成等技术,设计城市内涝三维可视化应急管理信息系统。构建包含感知层、数据层、服务层、应用层和客户层的系统体系架构,采用北斗技术实现多源信息的全天候、多维度动态监测与传输,同时基于Hadoop平台对海量数据资源进行分析和存储,构建城市三维可视化集成环境,利用综合集成技术为用户提供个性化的内涝应急管理服务。以西安市为研究区域,实现系统多源信息资源分析、内涝监测、内涝预警和内涝预案等功能模块。应用结果表明,该系统可提供全天候、多方位的内涝应急管理服务,适用性强、可扩展性好,能够为科学应对城市内涝提供决策支持。     

基于网格门户的协同服务集成技术研究

目前的协同服务建立在分布、异构、动态的网格环境中,能否提供一个统一的接口去访问这些资源以达成更广泛的协同变得越来越重要.门户技术所特有的优点为协同应用的集成提供了有效的方法,结合网格技术和门户技术,提出了基于网格门户的协同服务集成技术的设计方案和一个初步的实现.     

基于P2P技术的目录服务系统研究

随着信息系统应用领域的扩展和目录服务技术的兴起,目录服务已经应用到Internet的环境下.目录服务与P2P技术的结合为不同应用系统的集成提供了新的解决方案.目录服务能够实现对用户信息和网络资源的统一管理.为此,分析目录服务的优势,采用P2P技术进行信息资源的集成与管理,提出基于P2P技术的目录服务系统的结构.     

基于大数据的新兴产业计量校准服务平台研究

针对当前新兴产业计量校准服务资源分散、服务信息不透明、智能化程度偏低等问题,提出一种基于大数据的计量校准服务平台。基于计量校准资源共享和进出机制,整合集成服务主体、服务对象、服务支撑等计量校准资源,建立全国计量校准服务资源池。在给出平台系统架构的基础上,利用智能评估与故障预测技术、大数据挖掘可视化等技术,构建面向新兴产业发展的计量校准服务平台,为产业提供一站式、标准化、可靠、及时的计量校准服务,提升产业服务智能化水平。建立“服务平台+标准体系+技术措施+创新中心”于一体的技术支撑体系,提升计量校准服务效率和竞争力,促进产业计量校准覆盖研制、生产、试验和使用等全过程,实现产品质量提升和全过程安全管控。     

空间知识服务组合技术研究

空间信息系统要求能够依据空间服务需求,快速灵活地集成已有和新添的空间Web服务,实现基于空间知识网格环境的协同工作和应用集成,实现按需服务.提出和设计了支持空间知识服务的语义服务描述模型和基于语义的Web服务协同模型,利用协同模型将分散空间服务组合起来.通过引入动态服务组合和服务匹配、绑定机制,并且和空间知识本体库密切配合,实现资源动态绑定,真正有效地支持空间知识服务的动态组合与协同.     

分布式本体集成框架下虚拟本体集合动态生成算法

为了有效组织和管理网格环境内存在的各类分布异构的本体资源,提出了基于网关服务的分布式本体集成框架.从体系结构角度对本体集成过程中涉及到的功能模块进行分析和划分,并基于网格服务设计了关键组件.在此基础上从提高计算资源利用率和满足用户多样性需求的角度出发,提出了虚拟本体集合动态生成算法.该算法将缓存技术与虚拟本体相结合,为本体数据的自动生成和再生成提供了较完整的系统方法,增强了本体资源的复用性.实验结果表明,该算法可以提高计算资源利用率,实现本体资源的复用率.     

地质矿产资源数据网格中的异构数据的集成和访问方法

在新疆地质矿产资源数据网格环境中,教据集成除了实现异构数据源中数据检索,还应满足异构数据管理系统之间数据约束关系维护与协同工作的需求.针对这一需求,提出一种基于Web服务资源框架(WSRF)的数据集成机制.将虚拟化的局部数据信息与全局统一的抽象数据视图相结合,形成动态的层次化数据信息组织模型;通过该模型,满足数据管理系统的协同工作需求.基于研究成果的数据集成服务系统MRG-DAIS,系统平稳运行于新疆地质矿产资源数据网格环境中.     

一种面向服务的事件驱动架构信息集成平台构造方法

信息集成方法研究对企业异构复杂应用集成具有重要的学术和应用价值.提出一种面向服务的事件驱动架构SOEDA,可构建灵活的分布式信息集成平台.采用以服务单元形式封装的适配器连接各种异构系统,通过分布式标准消息路由器作为底层平台实现服务单元的注册、发现和通信.层次化体系和模块化设计有助于提高应用系统的敏捷性、互操作和集成能力.服务单元中采用事件驱动和动态线程池技术保障了系统的高效性.引入系统外部负载、线程开销和资源冲突,采用排队论模型对其性能进行评价.实例表明采用该方法构建的SynchroESB平台能够灵活集成企业遗留系统,提供高效可靠服务.     

面向复杂产品的异构数据集成模型研究*

为解决动态联盟环境下的复杂产品异构数据集成,针对传统集成技术存在的问题,在对Web服务等相关技术进行分析的基础上,提出了基于Web服务的复杂产品异构数据集成平台层次模型。研究了相关的关键技术,重点论述了企业产品设计集成机制和产品共享数据转换模型。最后结合某项目实例,进行了系统实现,为实现应用软件集成与设计资源共享提供了有效的解决方案。     

Adaptive middleware supporting scalable performance for high-end network services

Network service-based computation is a promising paradigm for both scientific and engineering, and enterprise computing. The network service allows users to focus on their application and obtain services when needed, simply by invoking the service across the network. In this paper, we show that an adaptive, general-purpose run-time infrastructure in support of effective resource management can be built for a wide range of high-end network services running in a single-site cluster and in a Grid. The primary components of the run-time infrastructure are: (1) dynamic performance prediction; (2) adaptive intra-site resource management; and (3) adaptive inter-site resource management. The novel aspect of our approach is that the run-time system is able to dynamically select the most appropriate performance predictor or resource management strategy over time. This capability not only improves the performance, but also makes the infrastructure reusable across different high-end services. To evaluate the effectiveness and applicability of our approach, we have transformed two different classes of high-end applications—data parallel and distributed applications—into network services using the infrastructure. The experimental results show that the network services running on the infrastructure significantly reduce the overall service times under dynamically varying circumstances.     

Mechanisms for SLA provisioning in cloud-based service providers

A challenge in cloud resource management is to design self-adaptable solutions capable to react to unpredictable workload fluctuations and changing utility principles. This paper analyzes the problem from the perspective of an Application Service Provider (ASP) that uses a cloud infrastructure to achieve scalable provisioning of its services in the respect of QoS constraints.First we draw a taxonomy of IaaS provider and use the identified features to drive the design of four autonomic service management architectures differing on the degree of control an ASP have on the system. We implemented two of this solutions and related mechanism to test five different resource provisioning policies. The implemented testbed has been evaluated under a realistic workload based on Wikipedia access traces on Amazon EC2 platform.The experimental evaluation performed confirms that: the proposed policies are capable to properly dimension the system resources making the whole system self-adaptable respect to the workload fluctuation. Moreover, having full control over the resource management plan allow to save up to the 32% of resource allocation cost always in the respect of SLA constraints.     

泛政府行业信息化数据跨域共享服务总线平台的设计与实现

对泛政府行业内网与其他网络间的跨网域的请求服务进行了研究,提出了泛政府行业信息化数据跨域共享服务总线平台的设计方案,底层硬件设计上基于单向光传输方式,实现不同网域间数据的安全隔离传输;上层系统软件通过服务总线（ESB）体系架构和定义统一请求调用接口,实现跨区域、跨网域间服务授权访问、资源授权调用和数据安全转发。整个系统由请求协议转换、安全检控组件、健康度评估、MQ数据服务、节点资源调度、限流熔断管理、通道任务管理、资源监控上报等模块组成,可实现请求服务、设备状态上报、通道任务管理、安全访问控制等功能,并根据不同业务量级设定不同应用模式,可满足跨网域移动警务请求服务数据资源的安全、高效传输需求。     

分布式网络资源管理和业务管理集成方法的研究

基于面向业务的网络管理概念，提出了一个支持动态生成、使用和管理业务的基础结构，该基础结构由抽象表达总线、业务工作流总线、网络事务总线和相应的一些功能单元构成。对增强和扩展基本管理功能的方法以及体系结构所需数据模型进行了探讨。利用文章提出的集成方法可以实现业务和网络资源的统一管理，通过业务管理协调资源使用，通过资源管理保障业务实现。     

基于SOA的高校人力资源与关系管理平台

针对高校人力资源服务和管理信息化的需求,采用面向服务体系结构(SOA),建设面向学校全局的人力资源和关系信息管理平台。实验结果证明,该平台能较好地实现异构系统的信息集成、共享,为人力资源对象提供个性化服务,并进一步提升学校业务部门的服务水平和信息系统的技术水平。     

Scheduling and flexible control of bandwidth and in-transit services for end-to-end application workflows

End-to-end scientific application workflows that integrate high-end experiments and instruments with large scale simulations and end-user displays are becoming increasingly important. These workflows require complex couplings and data sharing between distributed components involving large data volumes and present varying hard (in-time data delivery) and soft (in-transit processing) quality of service (QoS) requirements. As a result, supporting efficient data transport is critical for such workflows. In this paper, we leverage software-defined networking (SDN) to address issues of data transport service control and resource provisioning to meet varying QoS requirements from multiple coupled workflows sharing the same service medium. Specifically, we present a flexible control and a disciplined resource scheduling approach for data transport services for science networks. Furthermore, we emulate an SDN testbed on top of the FutureGrid virtualized testbed and use it to evaluate our approach for a realistic scientific workflow. Our results show that SDN-based control and resource scheduling based on simple intuitive models can meet the requirements of the targeted workflows with high resource utilization.     

Towards integration of service and network management in TINA

The Telecommunications Information Networking Architecture (TINA) defines a framework to support the rapid and flexible deployment and management of a wide range of multi-media, multi-party services in a multi-vendor telecommunications environment. The TINA approach applies opendistributed processing (ODP) and object-oriented design techniques to specify the control and management of the telecommunications services and infrastructure. Management in TINA is applied to the different components of the architecture, services and resources, and to thedistributed processingenvironment (DPE) that provides distribution transparencies and communication capabilities among TINA components. Management in TINA is based on TMN and extended with ODP concepts, as TINA is not concerned with just network management, but also systems management. TINA management architecture addresses aspects of distribution, interoperability, dynamic manager/managed roles, and integration with service control functions. TINA service management concerns different activities of the service life-cycle, from four main aspects: access session management, service session management, user session management and communication session management. The TINA network resource model supports requirements from both network management activities and service connectivity needs.     

Dynamic task assignment and resource management in cloud services by using bargaining solution

Cloud computing provides infrastructure, platform and software as services to customers. For the purpose of providing reliable and truthful service, a fair and elastic resource allocation strategy is essential from the standpoint of service customers. In this paper, we propose a game theoretic mechanism for dynamic cloud service management, including task assignment and resource allocation to provide reliable and truthful cloud services. A user utility function is first devised considering the dynamic characteristics of cloud computing. The elementary stepwise system is then applied to efficiently assign tasks to cloud servers. A resource allocation mechanism based on bargaining game solution is also adopted for fair resource allocation in terms of quality of service of requested tasks. Through numerical experiments, it is shown that the proposed mechanism guarantees better system performance than several existing methods. The experimental results show that the mechanism completes the requested tasks earlier with relatively higher utility while providing a significant level of fairness compared with existing ones. The proposed mechanism is expected to support cloud service providers in elastically managing their limited resources in a cloud computing environment in terms of quality of service. Copyright © 2013 John Wiley & Sons, Ltd.     

Web信息资源整合系统的技术研究及实现

在互联网络快速发展的背景下,网络所容纳的信息资源出现了爆炸式增长,同时,Web信息资源的孤立性、多样化以及冗余问题,却使信息资源的有效使用面临更大困难。论文阐述了以Webservice为核心的Web信息表示和资源整合技术,并针对科研网络的资源网站,研究实现一个Web信息资源整合系统应用。该系统实现对所属科研网站的静态网页、动态应用以及数据库资源的信息资源封装和服务提供。