基于SQL Server的登录、用户和角色管理的实现

对于当前的网络数据库应用来说,数据库的登录、用户和角色管理是必不可少的。每个要求访问数据库的SQL,Server登录,如果未在数据库中创建用户,则SQL Server登录就无法访问该数据库。而SQL Server用户,如果没有赋予相应的角色,也无法达到网络数据库应用的业务要求。笔者现将两年多实践过程中,对SQL Server的登陆、用户和角色管理的实现介绍给大家。     

用C#实现网络版指纹身份认证

阐述基于SQL Server数据库的指纹识别技术的软件系统登录模块的具体原理和实现,利用指纹控件技术实现指纹身份认证过程,将指纹认证模块嵌入到C#窗体实现了身份信息动态交互,并使用SQL Server网络数据库统一存取用户信息,确保了授权用户身份的真实统一性。     

用友T3不能连接SQL2005数据库的解决方案

用友T3电算化软件在企事业单位、教育教学中被广泛的应用,由于许多用户经常按默认方式安装SQL Server 2005数据库,导致经常出现输入SQL Server口令窗口,解决此类问题,主要是SQL Server 2005数据库安装中"隐藏高级配置选项"被选中、SQL Server 2005数据库配置错误、登录方式错误、远程设置错误等问题。     

浅析SQL Server2005安全管理

本文描述了SQL Server2005中各种安全管理机制,主要从身份验证、角色和权限三方面来进行分析。身份验证保证了用户的合法性,可以创建和管理具有windows身份验证和SQL Server身份验证模式的服务器器登录用户,也可以创建关联到登录用户的数据库用户;角色包括服务器角色和数据库角色,可将角色分配给用户;权限包括服务器权限和数据库权限,可将权限授予用户,使用户可以执行应的操作。身份验证、角色和权限的使用,共同保障了数据库的安全。     

浅谈SQL Server 2000的安全管理

数据库的安全（DataBase Security）是指保护数据库不受外来者的恶意访问，为此数据库管理者需要采取相应的保护措施。在众多的数据库开发系统中，SQL Server为维护数据库系统的安全性提供了完善的管理机制和简单丰富的操作手段。本文从登录的角度来考虑SQL Server系统中数据库的安全性管理，供相关读者参考。     

SQL DMO在Delphi中的应用

SQL Server拥有管理自身的强大能力,图形化管理工具MMC使得SQL Server管理员能够快速轻松地控制服务器的各个方面.这些工具的底层就是SQL-DMO（分布式管理对象）.SQL-DMO并不是一种新的数据库访问技术,他不关心数据库存储的信息,主要负责数据库本身的结构和维护,以及对包含数据库的SQL Server操作.SQL-DMO允许轻松地开发适合用户环境的定制SQL Server管理应用程序.使用SQL-DMO,可以使用Delphi或者其他OLE兼容语言来创建定制的SQL Server管理界面.该界面允许使用SQL Server企业管理器提供的功能.SQL-DMO允许应用程序执行通过那些SQL Server企业管理器手动实现的功能集.使用SQL-DMO,可以列出数据库和表、增加登陆帐户、控制复制、引入数据、引出数据以及执行其他管理任务.     

配置SQL Server 2008的资源调控器——通过向工作负载分配资源重获SQL Server系统控制权

在SQL Server2008之前,数据库引擎曾尝试为所有并发用户提供均衡的性能,这使你几乎无法控制分配给用户或工作负载的优先级。另外,许多组织有着数百（甚至数千）个应用程序,而DBA对用于访问其数据库的应用程序几乎一无所知。为应用程序的大量用户使用固定的SQL Server登录账号使该问题变得更加严重。     

SQL Server 2000在数据挖掘中的应用

本文简单介绍了数据挖掘技术和SQL Server 2000数据库，重点讨论了用SQL Server 2000数据库建立教据挖掘模型的，从海量的数据中找出有用信息的过程。     

基于SQL Server的企业数据库系统安全机制设计

针对某煤矿机械制造企业数据库系统用户数量较多而影响数据库系统安全性能的问题,提出了一种基于SQL Server的数据库系统安全机制的设计方案;详细介绍了该安全机制中登录身份模式选择、应用程序验证、创建SQL Server组、设置数据库访问、设置与分配用户权限以及其他安全机制的设计;指出在设计该安全机制时,应首先创建全局组,通过SQL Server Users组获得服务器访问,通过具体数据库组获得数据库访问权限,然后根据用户访问需求创建数据库角色并对角色分配权限,最后全局组通过加入角色获得权限,从而可确保数据库系统的安全。实际应用验证了该安全机制的可行性和有效性。     

浅析SQL Server数据库的安全和管理策略

随着网络和SQL Server数据库应用的发展,SQL Server数据库安全性一直是微软公司致力改善和用户关心的问题。本文就SQL Server数据库的安全漏洞的分析,帮助数据库管理员对数据库进行有效的安全配置,探讨数据库安全管理策略。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.