ADO.NET数据访问模型研究

ADO.NET是基于.NET框架的应用程序访问数据库的方式.ADO.NET是ADO的改进和完善版本,它开辟了分布式应用程序访问数据库的新天地,ADO.NET本身的许多新特性使它更适合于网络应用.文章首先简述了ADO技术的发展,接着重点讨论了ADO.NET技术及其数据访问模型,并将其和ADO进行比较,最后详细给出了一个ADO.NET的应用实例.     

基于的ADO.NET数据库访问技术研究

ADO.NET是微软针对ADO的缺陷而重新设计的一种全新的数据库访问技术。阐述了ADO.NET的结构与数据模型:数据提供程序和数据集。探讨了利用ADO.NET技术访问数据库访问的方式,同时给出了采用C#语言所实现的ADO.NET数据库访问技术在数据库中编程中的具体实现方案。     

基于ASP.NET技术的数据库访问通用类设计

ASP.NET是新一代的B/S系统编程工具,集众多优点于一身,在对数据库的操作上更是功能强大。但是传统的数据访问编程方式操作繁琐,而且重复累赘。本文以C#语言、SQL Server数据库为例,利用ADO.NET数据库访问组件,介绍了一种基于ASP.NET技术的数据库访问通用类设计方法。     

ADO.NET数据访问模型研究

ADO.NET是基于.NET框架的应用程序访问数据库的方式。ADO.NET是ADO的改进和完善版本,它开辟了分布式应用程序访问数据库的新天地,ADO.NET本身的许多新特性使它更适合于网络应用。文章首先简述了ADO技术的发展,接着重点讨论了ADO.NET技术及其数据访问模型,并将其和ADO进行比较,最后详细给出了一个ADO.NET的应用实例。     

创建基于.NET的通用数据库访问层

一、引言 ADO.NET为应用程序开发人员提供了一种全新的数据库访问机制,它使得数据库编程变得相当容易。然而,在运用ADO.NET进行数据库编程时,开发人员往往会因为不注意某些细节问题而使得应用程序的可扩展性很差,某个数据库应用程序只能应用于某个特定类型的数据库,而不能和更多的其他     

ADO.NET数据访问体系结构研究

ADO.NET是基于.NET Framework平台下的数据访问技术,该文介绍了ADO.NET的数据访问工作机理,并对ADO.NET和ADO进行了简单比较,分析了ADO.NET框架下访问数据库的两类核心组件,最后给出了采用ADO.NET访问不同数据库需要引入相应的命名空间。     

ADO.NET数据库访问技术在ASP.NET开发中的研究与应用

数据库访问技术是应用软件系统开发中非常重要的技术之一。以往应用软件对数据库的访问实现复杂,访问效率低。文中介绍了一种应用简单且数据库访问效率较好的数据库访问技术ADO.NET技术。详细介绍了ADO.NET数据库访问技术的对象模型组成,访问数据库的原理及一般操作步骤,最后通过一个具体的ASP.NET网站开发实例来说明了其应用。应用实例显示,ADO.NET数据库访问技术的应用简化了开发中数据库访问技术,提高了访问效率,同时还提高了数据访问的安全性。通过对此技术的研究与应用,希望能给相关的软件开发人员及数据库访问技术人员提供借鉴与参考。     

基于C#的ADO.NET数据访问技术的应用研究

介绍了在.NET平台下,ADO.NET通过.NET数据提供程序访问数据源的方式和5个主要访问数据库的对象,提出了ADO.NET访问数据库的两种方式,在VS.NET环境下,建立了使用DataReader对象和DataSet对象访问数据库的C# Windows应用程序,对访问数据库的关键代码进行了分析,总结了ADO.NET访问数据库的一般步骤。     

ADO.NET组件在企业信息系统中的研究与实现

数据访问技术是当前分布式系统应用的关键技术。讨论ADO.NET组件的对象模型、Oracle.NET几个重要的类及DataSet等对象的使用,利用C#语言通过SQL语句、存储过程和函数等方式对企业MIS中的Oracle数据库访问和实现进行详细的论述,并对ADO.NET组件的应用给出了若干建议,实践证明,该技术成功的开发了高性能、高效率、可伸缩性好的企业信息系统。     

ADO.NET数据库访问探讨

ASP.NET应用程序的数据访问是通过ADO.NET进行的,ADO.NET可以使Web应用程序从各种数据源中快速访问数据。从传统的数据库到XML数据存储,各种各样的数据源都连接到ADO.NET从而更灵活地访问数据,减少访问数据所需的代码,提高了开发效率和Web应用程序的性能。对于初学者来说,对ADO.NET数据库访问是非常头疼的问题,往往编程过程中顾此失彼,晕头转向,甚至有的就此放弃。为了理顺思路,就一点亲身体会在此与大家共勉。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。