以Portal技术为基础构建企业门户管理系统

信息化技术的发展和应用极大地推动了企业信息化的建设及完善,覆盖了公司生产经营各个业务领域。随着企业应用系统的不断累积,需要搭建企业门户管理系统,构建企业信息及数据集中展现平台,为用户提供"一站式"的综合办公平台。做好企业门户管理系统的构建可以借助多种架构来予以实现,以Portal技术为例以其基础来构建企业门户管理系统将使得企业门户管理系统具有良好的应用效果。本文在分析了基于Portal技术的企业门户系统框架结构的基础上,对如何做好企业门户管理系统的构建进行分项阐述。     

基于SharePoint技术的企业信息门户建设与应用

文章重点研究基于微软SharePoint技术构建企业信息门户,企业信息门户的建立有效整合了企业信息资源,统一了用户身份认证机制,简化了用户使用信息系统的复杂度,提高员工工作效率。门户的建立最终将促进企业信息化应用向集成化、一体化方向发展。     

政府网资源的开发策略

本文分析了“政府上网工程”现状,认为充分开发政府网资源,实施“区内企业上网工程”是政府网进一步发展的关键,并提出了开发政府网资源的三个策略：提供政务网上处理、信息资源服务和建立政府信息门户等增值服务。这样,不仅提高了政府网的经济和社会效益,促进政府网的进一步发展完善,也将带动区内企业的信息化。     

信息门户在中国石化的部署与应用

中国石化致力于发展成为有竞争力的跨国能源公司,加强信息化建设,是发展目标的必然选择,建立两级门户体系、统一规范标准、统一办公平台是中石化信息门户的目标,以促进中国石化信息化更加健康的发展。     

知识门户的概念与设计思想

从企业应用特点和问题出发，提出门户系统的需求背景，结合对IT模型的理解，给出知识门户的概念和IT实现的原理，进一步提出企、世知识门户的规划设计方法和实施步骤。     

论Oracle Portal及其门户网站开发

Portal是IT领域的新技术,是企业信息化工作的发展方向之一.首先介绍Oracle Portal的定义、特点,接着阐述portal的体系结构.介绍Oracle9iAS Portal的功能特点及基于它的企业门户网站的开发.最后简要探讨了基于portal的门户网站开发的问题.     

基于URP平台的数字校园系统的设计与实现

数字校园是在高校信息化建设中提出的新目标。整个设计思路是利用(URP)作为数字校园的整体建设模型,对整个体系结构进行分析,用层次化、整体的观点来实施校园信息化建设,着重对综合信息门户、身份认证系统进行了详细的分析。最后是将成功研发的具有高度管理智能化URP系统应用平台的解决方案部署到实践中去。     

门户系统冗余架构关键技术的研究与应用

冗余技术的应用对保证门户系统的可靠性和实时性有重要的作用。文章介绍了冗余技术的相关概念,重点论述了多种冗余技术在门户系统中的应用模式。     

基于主题门户理论的互联网发展研究

主题门户理论是计算机互联网信息资源与信息获取之间对接的一种理论模式探索。计算机技术及互联网规模快速发展,用户对信息获取在时间、途径上要求更加快捷,主题门户理论为其提供了信息对接过程中需要的模式和动态平台,通过主题门户理论去探讨用户与主题门户网站之间信息对接的一些问题,这些问题涉及用户完成信息获取的预设,提高主题门户网站的运营效率,完善互联网信息对等交流。     

基于NP架构的信息控制系统的设计与实现

对政府、企业网络文档传送需求进行深入分析,介绍NP技术,设计了基于NP架构信息流控制系统,该架构具有操作设计灵活方便的特性,达到了控制内外网信息传输的目标,为重要信息流通控制提供有力的安全保障。     

基于网格的在线考试系统

当前的在线考试系统各自独立,使得教育资源分散,不能满足社会对教育资源日益增长的需求,而网格技术是继万维网之后出现的新型网络计算技术,实现了网格资源的极大共享和无缝集成;网格门户则提供了统一访问网格资源的手段,可以透明地访问来自不同地域的各种异构资源。网格技术可以实现教育资源的透明共享,该文介绍如何采用网格技术构建基于网格的在线考试系统,实现学校间的题库资源的透明共享,并阐述网格在线考试系统设计与实现的关键技术。     

基于 PHP 的包装企业门户网站设计与实现

结合包装企业自身的业务特点,对信息进行了全面集成,开发出了包装企业级应用的门户网站。 网站以 MYSQL 为数据库平台,运用 Apache 网络信息服务器和 PHP 技术对门户网站进行技术开发。 该网站具有会员注册、包装商品展示、在线交易等综合功能,同时实现订单与用户的有效管理。 通过这些功能的实现,给包装企业提供了一个动态交互式,具有商品提供和系统管理等功能的电子商务平台。     

“标准文献平台”信息系统建设

本文对"国家标准文献共享服务平台"信息系统的主要功能和特点进行了介绍,主要包括平台门户、资源汇交、分布式加工、内容揭示、信息推送和国家科技基础条件平台接口等系统。     

MANPro: mobile agent-based negotiation process for distributed intelligent manufacturing

This paper examines negotiation procedures in an agent-based distributed shop floor control system (SFCS). A distributed SFCS is under a heterogeneous environment, which is controlled through negotiations between autonomous agents. The negotiation-based control can be considered as the core of a distributed control paradigm. An efficient information exchanging mechanism and an information model with reasonable structure are indispensable for effective negotiations. This paper proposes a novel negotiation mechanism, called a mobile agent-based negotiation process (MANPro), which applies a mobile agent system to the process of information exchange. Since using mobile agents allows each component to execute asynchronously and autonomously and to adapt dynamically to the execution environment, MANPro may guarantee autonomy of agents. Moreover, it is possible to build a fully distributed and autonomous SFCS by using MANPro. MANPro is based on the agent-based control architecture, which includes a communication architecture and an information architecture. The communication architecture provides the exchanging mechanism of information, defining functional modules to support the mechanism while the information architecture provides the framework for information modelling on negotiation, proposing information models required for introducing the ontology concept.     

GaiaWorld: A Novel Blockchain System Based on Competitive PoS Consensus Mechanism

The birth of blockchain has promoted the development of electronic currencies such as Bitcoin and Ethereum. Blockchain builds a financial system based on cryptology instead of credit, which allows parties to complete the transaction on their own without the need for credible third-party intermediaries. So far, the application scenario of blockchain is mainly confined to the peer-to-peer electronic financial system, which obviously does not fully utilize the potential of blockchain.
In this paper, we introduce GaiaWorld, a new system for decentralized application. To solve the problem of resource waste and mismatch between nodes and computing power in traditional PoW mechanism, GaiaWorld introduces a new consensus mechanism called CPoS, which can improve productivity and liquidity of blockchain system. GaiaWorld constructs a new architecture based on forging committee and forging group systems, which can establish a decentralized, free and stable internet trust system, and can be utilized in multiple application scenarios and construct efficient and reliable content delivery systems.     

Research on Architecture of Risk Assessment System Based on Block Chain

The risk assessment system has been applied to the information security, energy, medical and other industries. Through the risk assessment system, it is possible to quantify the possibility of the impact or loss caused by an event before or after an event, thereby avoiding the risk or reducing the loss. However, the existing risk assessment system architecture is mostly a centralized architecture, which could lead to problems such as data leakage, tampering, and central cheating. Combined with the technology of block chain, which has the characteristics of decentralization, security and credibility, collective maintenance, and untamperability. This paper proposes a new block chain-based risk assessment system architecture and a consensus mechanism algorithm based on DPOS improvement. This architecture uses an improved consensus mechanism to achieve a safe and efficient risk assessment solving the problem of data tampering in the risk assessment process, avoiding data leakage caused by improper data storage. A convenient, safe and fast risk assessment is achieved in conjunction with the improved consensus mechanism. In addition, by comparing existing risk assessment architecture, the advantages and impacts of the new block chain-based risk assessment system architecture are analyzed.     

变截面门式刚架结构的非线性性能

本文论述了变截面有限梁元几何非线性分析方法;研究了变截面刚架的几何非线性影响;通过非线性屈曲分析考察了屋面均布荷载对刚架柱稳定的影响;计算结果表明,刚架在屋面均布荷载作用下所产生的横梁轴力和弯曲变形对其侧向屈曲荷载的影响不能忽视。     

Improvement of radiotherapy treatment delivery accuracy using an electronic portal imaging device

Reliable application of advanced external beam techniques for the treatment of patients with cancer, such as intensity modulated radiotherapy, requires an adequate quality assurance programme for the verification of the dose delivery. Accurate patient positioning is mandatory because of the steep dose gradients outside the tumour volume. Owing to the increased complexity of the treatment planning and delivery techniques, verification of the dose delivery before and during the actual patient treatment is equally important. For this purpose, a quality assurance programme has been established in our clinic that is primarily based on measurements with electronic portal imaging devices. To minimise systematic set-up errors, the patient positioning is measured in the first few treatment fractions and a set-up correction is applied in the subsequent ones. Before the first treatment fraction, portal dose measurements are performed for each treatment field with the electronic portal imaging device to verify that the planned fluence distribution is correctly delivered at the treatment unit. Dosimetric measurements are also performed during patient treatment to derive the actually delivered fluence maps. By combining this information with knowledge on the patient set-up, the delivered 3-D dose distribution to both the tumour and sensitive organs may be assessed. However, for the highest accuracy, exact knowledge on the (internal) patient geometry during treatment, e.g. using a cone-beam CT, is required.