电子保险柜网络监控系统的设计与实现

在简介电子保险柜网络监测系统的基础上,给出了监控系统的总体结构框图,重点讨论系统的数据库设计方案以及上位机的数据传输及对下位机的控制问题。采用VC 6.0和串行通信类CSerial,通过RS-485接口实现了计算机与89C51单片机的串行数据传输,最终实现了计算机对以89C51单片机为核心的电子保险柜的远距离控制和数据传输,帮助管理人员比较全面的了解用户的各种信息,具有适时处理监测网络信息,密码用户登记、查询、修改、事故记录、查询、声光报警等功能。     

单片机矿井安全监测系统

介绍了一种适用于中、小型矿井的煤矿安全监测系统，利用MCS－51单片机串行通信的多机通信中断方式，其上位控制机和下位监测机均采用89C51单片机。在本文中，主要介绍了下位监测机的设计及上、下位机之间多机通信的实现。     

基于Visual C＋＋6．0的PC机和AT89C51的串行通讯

介绍了在Windows 2000平台下使用Visualc＋＋6．0开发工具用API串口通讯函数实现PC机与单片机AT89C51的串口通信，重点介绍计算机采用事件驱动异步I／O方式的通信实现及AT89C51、MAX232和PC机串口接线和AT89C51的编程设置。     

基于C++Builder的数据采集系统串行通讯的实现

本文介绍了一基于89C51系列单片机的数据采集系统，重点论述了在可视面向对象语言C＋＋Builder下对串行通讯的一种新的软件实现方法。     

PC机与C51单片机的串行通信研究

随着PC机技术和单片机技术的日益成熟,单片机与PC机通信技术的应用也越来越广泛,对通信技术的研究也越来越多,特别是串行通信。该文以RS-232为接口线路,89C51单片机学习板为硬件环境,Visual Basic作为软件开发工具,利用其提供的各种面向对象的开发工具及串行通信控件MSComm,设计了一个PC机与C51单片机串行通信系统。系统主要可以完成PC机和单片机之间手动的数据发送,自动的数据发送,数据传输过程中的奇偶校验,单片机的按键触发,数码管显示等功能。     

一个单片机串行数据采集及传输模块的设计

以AT89C51单片机为核心,使用12位并行A/D转换器AD574A、多路开关CD4051及多组RS-232驱动/接收器MAX232,设计了一个串行数据采集/传输模块。模块中主要分为两部分,第一部分由AD574A芯片和两个多路开关CD4051实现16路12位A/D转换,完成串行数据的采集;第二部分由AT89C51单片机和MAX232芯片实现与计算机间的串行数据传输。文中给出了硬件原理图和主要源程序。     

基于单片机的步进电机控制系统

本文论述了以单片机AT89C51为控制器的步进电机的控制系统,内容主要包括该系统的硬件组成,步进电机运行过程的详细分析,PC机与AT89C51单片机之问的串行通信以及AT89C51单片机对步进电机的控制程序流程图等.     

PC机与MCS-51单片机的串行通信在数据采集系统中应用

本文介绍了MCS-51单片机与微机的串行通信方法，详细说明MCS-51单片机串行通信在数据采集系统中的应用，深入探讨并成功实现了如何利用Visual C＋＋6．0来开发串行通信程序。     

小议PLC与单片机之间的串行通信及应用

本文提出了PLC(可编程序控制器)和单片机之间实现串行通信的概念,以松下电工中的FPI系列PLC和AT89C51单片机之间的串行通信为例,主要对串行通信硬件接口电路的串行连接的实现方法进行分析,通过校验码的对接来提高数据传输的可靠性,实现远距离间的PLC和单片机的通信。     

基于AT89C51的智能电话计时系统研究

本文详细介绍了一种智能电话计时系统的设计与实现.该计时系统以单片机AT89C51作为主控芯片,通过音频译码器LM567,识别出各种电话信号音和MT8870的解码信息,以达到对用户每个主叫电话信息记录的目的;并带有合理的人机交互的显示屏和控制键盘,以便用户查询主叫信息.     

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.