FCS技术在选煤厂的应用

针对大型选煤厂生产集中控制和单机自动化系统中存在的PLC规模庞大、控制器、执行器、检测装置与PLC间采用大量电缆联接、系统造价高、安装、维护工作量大等诸多问题,设计了一种现场总线控制系统(FCS),详细介绍了FCS的网络结构、系统构成和系统特点。该系统已在开滦(集团)钱家营矿业分公司选煤厂技术改造中成功应用,解决了传统PLC控制系统存在的问题,满足了现代化大型选煤厂对控制系统的要求。     

数据仓库管理中的若干关键技术

一、前言 随着信息技术的高度发展,极大地推动了数据库应用的规模、范围和深度。数库应用已经从点(单台机器,独立系统),线(多台机器,局域网联接的某个部门),发展到面(网化计算机,多网络联接的     

工程数据库管理系统EDBMS的设计与实现

本文从数据管理和工程应用两个方面介绍了一个直接与图形接口管理环境(GIME)、几何造型系统GEMS、交互绘图系统GIS等相联接的面向工程应用的数据库管理系统EDBMS的设计与实现,并讨论了适合于工程应用的系统数据模型、用户接口及其与图形处理系统之间的接口问题.     

城市规划土地管理信息系统设计及实现

介绍了城市规划和土地管理图文处理系统的设计与实现。阐述了系统中涉及的分布式数据库设计、空间数据与非空间数据的联接、数据库事务跟踪管理等关键技术。系统实现了城市GIS与城市规划土地管理的高度集成,进一步提高了政府管理部门信息化应用水平。     

基于FPGA和多DSP的多总线并行处理器设计

设计了一种用于目标识别与定位的基于FPGA和多DSP的多总线并行处理器,其特征在于将FPGA作为系统数据缓存、通信与控制中枢,以此为核心,通过数据与控制总线联接端口控制CPLD芯片,通过EMIF总线分别联接DSP(A)、DSP(B)和DSP(C)处理芯片;端口控制CPLD芯片的输入端联接多路并行ADC模数转换芯片,输出端口联接LCD输出显示模块;有源晶体振荡器与FP-GA芯片联接,FPGA芯片将有源晶体振荡器分为4路时钟信号输出,分别输出到CPLD和3片DSP芯片;设计改进了传统采用单DSP搭建信号处理器模式,实际测试的系统内部数据传输速度达到100M,系统最大处理能力可以达到7200MIPS,具有功能强、性能指标高、结构紧凑的优点。     

微机关系数据库管理系统NITDB的关系运算库

NITDB是南京工学院在高档微机系统Dual83/20上研制的一个多用户关系数据库管理系统.本文讨论了在设计和实现NITDB的关系运算库时的一些问题,介绍了库中所采用的顺序检索、有界顺序检索、有界二分顺序检索、辅助索引检索、聚集索引检索、二元(三元)直接多遍扫描联接、二元归并扫描联接和二元聚集索引联接诸关系运算实现函数的算法思想,并对这些函数的性能进行了分析和测试.     

机械系统总体方案设计的决策支持系统

本文重点阐述了在机械系统总体方案 CAD 系统中,应用决策支持系统(DSS)技术的必要性和可能性;讨论了该系统的结构、特征和关键技术。作为 DSS 技术的一个应用实例,文章介绍了轮式装载机总体方案设计决策支持系统(WLGSDSS),包括该系统的功能、结构和设计结果。     

基于DGPS的林业信息采集系统的设计和实现

论文介绍了一套后差分GPS的林业信息采集系统的设计与实现。该信息采集系统软件主要是为解决GIS和GPS之间的逻辑联接而开发的GIS和GPS的集成应用软件,其分为三部分:GPS外业数据记录软件,外业数据采集软件和内业处理软件。文章中对该系统的设计、功能以及软件在林业中的应用等方面都进行了较为详细的讨论。     

基于ASP.NET的在线考试系统

以ASP.NET为开发平台,使用C#语言,后台联接SQL数据库。从系统的开发环境、系统功能、模块设计及编码等几个方面,介绍和设计B/S模式架构的在线考试系统。     

SCIB单片机CRT显示接口板

本文介绍了一种可直接用于Intel系列单片机用户系统配接CRT显示器的通用接口产品。该接口板内自含字符电视信号发生系统、字库和显示缓冲区;采用并行接口与单片机相联接;采用软开关来切换接口板的屏幕编辑和显示工作状态。文章介绍了SCIB接口板的设计思想、工作原理、软件设计方法以及典型应用实例。     

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.