iFix与SQL通讯的设计与实现

工控软件iFix是实时监控系统常用的开发平台,但iFix数据库功能不完善,数据查询缓慢并且不支持多用户同时访问,难以满足在实时监控中数据分析的需要。为了实现一个功能完善的、高效的、面向多用户的数据库,提出了用SQL Server数据库替代iFix数据库,探讨了其实现过程。实践表明用SQL Serverss数据库替代iFix数据库能够有效解决的iFix数据库的问题,满足实时监控系统数据分析和处理的要求。     

企业进销存管理系统的设计与实现

用Visual Basic开发工具和SQL Server 2000数据库,以及ADO数据库接口开发了一个企业进销存管理系统.该系统使用Adodc数据源管理器和Data Environment数据环境设计器与后台数据库连接,系统应用程序中借助SSTab等控件来管理和分析数据,实现数据的添加、删除、查询、浏览、报表打印等功能.     

基于VISUAL BASIC的数据访问技巧

本文阐述了在VB的环境中利用数据控件、DAO（数据访问对象）及SQL等工具,配合MicrosoftJet访问本地或远程数据库的具体实现方法。     

用自定义Treeview控件实现层次结构数据浏览功能

使用自定义Windows窗体控件,实现了树控件直接访问数据库中用户层次结构数据．扩展Treeview树控件的功能。讲述了使用ADO．NET访问SQL2005数据库的典型方法．以及在Treeview控件中创建派生节点、添加自定义字段、构造函数的方法。     

基于MySQL的数据库查询性能优化技术研究

面对小范围局域网内数据总量不断增长的发展趋势,依托MySQL数据库管理系统、SQL查询语句,进行数据表索引、SQL查询语句、分页查询方式、MySQL查询缓存等设置,随后开展后台数据库中数据信息的SQL语法规则分析、扫描、预处理、查询执行、存储操作,针对影响数据库查询效率的客观因素,提出数据访问响应、页面加载的性能优化方案,保证MySQL数据库查询及数据调取的性能。     

利用存储过程优化CMS系统查询

在CMS系统查询中,影响查询效率最主要有两个方面:首先是设计合理高效的SQL查询脚本,合理使用索引、嵌套子查询、WHERE条件子句.其次是优化ADO数据访问.本文利用了存储过程优化CMS系统中查询模块时数据库的访问.通过一个实例说明如何利用存储过程提高查询效率.     

在VB中快速访问SQL Server数据库的方法

针对SQL Server系统所建立的数据库，分别就DQO、RDO ADO不同机制下的数据源访问列举出采用数据绑定控件和适应动态编程的非绑定控件的应用，着重对ADO方法进行了详解。     

PLC、组态软件在发动机测试台的应用

描述了如何运用PLC及西门子上位监控软件WinCC V6.2中集成的VBS脚本在发动机检测线将实时测试参数记录到数据库中,并最终通过用户查询,以报表的形式打印出来。系统由PLC控制,由WinCC通过西门子专用通道,以变量标签的形式将实时数据采集后并用VBS脚本编写标准的SQL语句将实时信息插入到数据库。通过使用ADO控件实现访问数据库。采用微软标准的ListView可视化控件来显示查询的结果。系统运行良好,可以很方便地采集、存储、查看电动机测试数据。     

基于.NET的数据库访问优化策略

在一个应用系统中,如果有数据库访问操作,数据库操作的性能将直接影响应用程序的性能。本文介绍基于.NET数据库访问技术的优化,包括数据库连接池技术、数据对象的选择、连接的关闭技术、数据缓存技术,以及SQL查询语句的优化,通过优化数据库访问来提高应用程序的性能。     

面向城轨线网的海量数据查询优化方法

城轨线网数据中心汇集多条线路数据,单表记录量达数十亿条,当前系统数据查询响应时间过长、效率低下.提出利用数据库集群及中间件优化系统架构突破单库存储与处理瓶颈,多节点并行处理提升查询速度.按线路水平切分数据等方法,保证JOIN操作的局部性,满足新线路扩展需求;利用表分区、索引、物化视图、SQL语句优化等技术优化单机查询.其中,针对集群数据透明访问系统架构,设计专用数据库访问中间件,解决查询解析、路由及结果合成等关键问题.以广州城轨线路数据为例进行实验,结果表明通过本文方法各类查询响应时间至少降低90%.     

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。