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1.
随着分布式数据库应用的深入,永久的数据库联接是相当耗费资源的。在访问SQL SEKVEK数据库中,采用ADO-NET技术可以完美地解决这个问题。本文讨论了ADO.NET的主要对象,并深入分析了其访问SQL SEKVEK的过程。  相似文献   

2.
RDO远程访问SQL Server数据库技术分析与实现   总被引:1,自引:0,他引:1  
从RDO对象模型开始,分析了RDO访问SQL Server数据库的存取技术及实现过程,详细介绍在数据库编程中如何使用RDO访问SQL Server数据库。  相似文献   

3.
基于实体类的数据库访问技术的研究与实现   总被引:1,自引:0,他引:1  
实体类隔离了代码对数据库的依赖,降低了开发的难度。本文分析了Java语言中传统数据库访问技术与基于实体类的数据库访问技术的优缺点,简述了基于实体类的数据库访问技术的一般过程,并结合一应用实例说明了它的使用方法。  相似文献   

4.
:在稀土化合物Web数据库系统的开发过程中,涉及到大量的后台数据库访问操作,因此,数据库访问方法是该系统中的核心问题之一,而传统的数据库访问技术有许多缺陷。ADO技术是微软推出的一种基于Web的数据访问和数据库编程技术,为不同的应用程序访问相同的数据源创建了一个更高层次的公用平台。它不仅可以访问关系数据库,还可以访问非关系数据库。本文探讨如何将ADO技术应用到稀土化合物数据库系统的设计和开发中,以实现高效率的数据库连接访问。  相似文献   

5.
随着分布式数据库应用的深入,永久的数据库联接是相当耗费资源的。在访问SQLSERVER数据库中,采用ADO.NET技术可以完美地解决这个问题。本文讨论了ADO.NET的主要对象,并深入分析了其访问SQLSERVER的过程。  相似文献   

6.
基于EJB的数据库访问技术   总被引:2,自引:0,他引:2  
分析EJB组件访问数据库的实现技术及优势,给出EJB体系结构中SessionBeans和EntityBeans访问数据库的实现过程。  相似文献   

7.
使用ADO实现关系数据库访问层   总被引:2,自引:2,他引:2  
在使用面向对象方法开发关系数据库应用系统时,人们希望对业务逻辑层开发人员隐藏在关系数据库中存取对象的细节,数据库访问层模式就是解决这个问题的一种设计模式。数据库访问层可以以多种方式实现,以ADO数据访问技术为基础,描述了一个关系数据库访问层的实现方案。  相似文献   

8.
姚文江 《计算机工程》2004,30(12):334-336
信息时代的到来,促进了计算机数据库的发展,在客户/服务器模式下的Web数据库系统中,存储和管理着大量重要数据资料。基于广域网的Web数据库访问会带来很大的安全问题。该正是基于这点,通过对Web数据库的访问技术,安全性问题的分析出发,对Web数据库访问的安全性技术进行了初步分析和评价。  相似文献   

9.
基于LabWindows/CVI和ADO的动态访问数据库的实现   总被引:1,自引:0,他引:1  
介绍了数据库访问技术——ADO技术,探讨了LabWindows/CVI基于自动化的数据库访问机制和建立驱动程序的过程,提出了动态创建Access数据库的方法,详细说明了在LabWindows/CVI中如何使用ADO动态访问数据库,最后给出了利用该方法实现Access数据库的访问实例。  相似文献   

10.
浅析VB访问数据库的常见错误与难点   总被引:1,自引:0,他引:1  
VB结合Access在信息系统的开发得到了广泛的应用,因而成为中专学生毕业设计的首选题目.文章对学生在开发的具体过程中的常见错误与难点进行了有效的分析总结,有利于加深学生对VB访问数据库技术的快速全面了解与应用,并对VB教学中数据库技术这个重难点给予有效可行的教学参考.  相似文献   

11.
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.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
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.  相似文献   

13.
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。  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
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.  相似文献   

19.
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.  相似文献   

20.
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.  相似文献   

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