基于MIS系统的用户动态权限管理

通过对管理信息系统(MIS)用户权限管理的全面分析,比较了MIS中常见的用户权限管理方案,提出了一种动态权限管理方案.该方案使MIS中各类用户能方便地使用软件系统,同时确保MIS的安全性.此方案已在环保信息管理系统中加以应用,取得了较好的效果.     

一种基于角色的数据库安全访问控制方案的设计与实现

在管理信息系统和决策支持系统的研究与广泛应用中，后台数据库的安全性问题至关重要。采用了基于角色访问控制模型的数据库安全性设计方案，该方案利用后台数据库的安全管理机制，结合具体角色实现了权限所及的安全访问控制，并成功地运用于“黑龙江防洪决策支持系统”等多个实际的工程项目中，有效地解决了安全访问控制问题。     

文件检索与RBAC在OA系统中的应用

在OA(办公自动化)系统中,如何实现快速、方便的文件检索和权限控制,是当前研究的热点.本文阐述了采用FTP文件共享系统,数据库方式存储与目标文件有关的大量信息,可以根据文件名、文件大小、关键词、作者等多种方式查找文件,方便用户在浩瀚的OA系统中快速地找到所需要的目标文件;在权限管理方面采用RBAC(基于权限的存取控制)策略管理用户权限,提高系统的安全性.以达到方便,快捷地检索文件和灵活、安全管理的目的.     

基于SSH框架的企业车辆管理信息系统

企业车辆管理信息系统相对于传统的办公管理信息系统具有处理过程的不确定性和用户权限等独特的问题,针对这些问题,采用SSH框架设计了灵活的架构,对用车申请和用车审批两个核心业务流程进行了设计与实现,通过将策略模式和工厂模式结合起来,实现了动态可热插拔的审批流程,解决了不同用车申请需要调用不同审批流的问题. 对用户权限进行了设计以实现系统安全性.     

管理信息系统中用户口令和权限的管理

管理信息系统(MIS)对管理信息进行收集、传递、储存与处理,它的一个最大特点是系统信息为多个用户所共享。 目前,许多软件采用下述方法进行口令、权限管理:就是在进入系统时设置口令,再在重要操作前设置口令。该方法简单用效,但到处设置口令,让人难以忍受。本文结合笔者从事管理信息系统开发的经验,介绍一种通用、有效的用户和权限管理方法,把用户口令和用户对系统的操作权限结合起来,用户只在进入系统     

贵州省科技管理信息系统数据库的设计与实现

本文以贵州省科技管理信息系统数据库为原型,较全面地介绍了对管理信息系统的性能和效益都起到决定性作用的系统数据库的设计与实现的方法和步骤。文中所建立的科技管理信息的数据模型、以扩充关系数据库管理系统来实现对网络(层次)数据库的管理、通过对用户访问权限的控制来克服或降低数据库并发操作异常以及实现远程通信、联机检索的安全性控制等办法,对于大型数据库的设计与实现都具有实际的推广和参考价值。     

基于用户角色的动态目录树的研究与应用

在管理信息系统中,不同的用户角色的权限不同,系统应该根据每个用户的不同权限生成相应的目录树。针对此问题,提出如何利用c#.NET和数据库进行结合,根据用户角色的不同动态地生成相应级别的目录树,以此提高系统的简洁性和安全性。     

大型数据库中的末端权限管理

为解决在使用大型数据库的系统中，由于用户众多且变动频繁而引起的授权机制混乱的情况。采用了一种新的末端用户权限管理的模式，使得整个权限管理系统即严密又灵活。为末端用户众多的系统提供了一种新的权限管理模式。并结合参与开发的三峡工程移民管理信息系统的实例，提出了在用户的高端采用分级权限管理，而在用户的末端采用自助权限管理的设计模式，并给出了相应的实例。     

基于RBAC的员工管理系统设计

分析了RBAC模型的基本原理、结构,描述了RBAC在B/S模式信息管理系统中的应用模型,并将这种新的应用模型应用到客服中心员工管理信息系统开发中,实现了用户与角色相关联、角色与权限相关联,不同用户拥有不同的操作权限,增加了系统使用的安全性以及系统管理的工作效率。     

FOXPRO中用户权限的管理

本文以Ｆｏｘｐｒｏ为开发工作，介绍一种在多用户管理信息系统中进行用户登录与权限管理的实现方法。     

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