基于PPP协议实现GPRS模块无线接入Internet方式

通过对PPP协议的分析,介绍了一种单片机通过GPRS无线方式接入互联网的方案.该方案将单片机与GPRS模块结合起来,在单片机上实现PPP协议和简化的TCP/IP协议,并用单片机驱动GPRS模块实现上网.重点讨论了硬件和软件主体框架、PPP协议在摩托罗拉单片机上的实现过程.该方案已成功应用于电网抄表项目.     

单片机实验仪故障检测程序的设计

为了高效、快速检测单片机实验仪的故障,本文进行了单片机实验仪的故障检测程序设计。该程序设计包括基于单片机和基于PC两部分。基于单片机的程序嵌入了RTX51 Tiny实时操作系统,基于PC的程序采用Visual Basic语言编写。     

基于EDA技术的单片机与总线接口逻辑设计

单片机具有传输速度快、可靠性高、使用灵活等优点,常常作为一种通信接口规范应用在PC外设和便携式系统中。利用单片机与大规模CPLD的互补性,介绍了基于EDA技术的单片机与FPGA／CPLD总线接口逻辑设计,并给出了该接口芯片的单片机控制程序的源程序。结果表明该总线接口逻辑电路工作稳定、可靠,已经在高速数据采集的PC外设上得到应用。     

基于MSP430F2619的单片机实验系统

为了解决当下高校单片机教学中存在的普遍问题,提出了一种新型单片机实验系统。该系统采用430系列单片机中功能最为齐全的F2619作为主芯片,合理设计了外围电路,较为全面的呈现当代单片机系统的软硬件特征,并提供C语言开发的范例和程序代码。系统降低大学生单片机学习难度,简化开发过程。教学实践结果表明,该系统能够改善高校单片机教学。     

基于多串口的单片机群控系统管理调度技术

简单地介绍了单片机群控系统的逻辑结构和单片机的通信协议,重点讨论了单片机管理调度的算法和实现技术.对基于多串口的利用大量单片机对设备进行控制和采样的系统,给出了一种并行、实时、容错的单片机管理调度实现技术,采用面向对象方法,设计了一个统一的单片机驱动程序框架,使单片机驱动程序的编制简单化、规范化.同时,该技术允许通过配置不同的串口数和每个串口允许管理的最大单片机数来对控制系统的实时性进行调整,而无需修改管理程序.     

多功能模块式单片机教学实验箱的设计

笔者针对现有单片机教学实验装置的不足,结合高职学生特点,以多功能、模块化、易扩展为设计思想,设计了一个集仿真、下载与实验为一体的多功能模块式单片机教学实验箱。详细介绍了该多功能模块式单片机教学实验箱的软硬件设计思路与方案。通过设计探索与实践,该单片机教学实验箱可较好地应用于教学实验、课外自主学习和设计竞赛等创新活动中。     

Proteus仿真软件在单片机课程中的应用与实践

结合单片机课程教学现状及Proteus仿真软件的特点,从单片机课程教学方法和教学手段的改革出发,介绍了Proteus仿真软件在单片机理论教学和实践教学、科技制作中的应用与实践。实践证明该课程的教学改革取得了较好的效果。     

MB89630系列单片机应用技巧及实例

文中简介了MB89630系列单片机的硬件概况，根据实际体会，叙述了该系列单片机硬件几个有特点的功能和使用技巧，也为尚不熟悉该系列单片机的有关工程技术人员提供一个单片机选型的参考，最后简介了一个应用实例。     

新型陶瓷墙地砖燃气辊道窑温度监控系统

介绍一个以单片机为核心构成的燃气辊道窑炉温监控系统。该系统采用单片机智能仪表和可编程序控制器技术,大大提高了陶瓷工业生产设备的自动化程度。较详细论述了该系统的组成、工作原理、控制算法和软件编程。     

“精通PIC单片机”实用技术讲座(一)——PIC系列单片机的主要特点和自学方法

90年代后,在我国的单片机市场上,出现了许多优秀的单片机系列产品,其中Microchip公司的PIC系列单片机具有很大的影响力。在这里,笔者将向读者介绍PC单片机的特点、用途和学习PIC单片机编程技术的实用方法。一、PIC系列单片机的主要特点美国Microchip公司的PIC单片机是一种CMOS 8位单片机,该系列单片机采用了RISC精简指令系统和哈佛总线结构,其运行速度比一般的单片机快4倍。PIC单片机的程序存储器有多种类型:EEPROM型、Flash memory(闪速存储)型、OTP型(一次性编程)和掩模型等。其中Flashmemory芯片,如PIC16F84/16F84A/16F627/     

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.