基于增量式PID算法的帆板控制系统的设计

基于STC12C5A60S2单片机与增量式PID算法,实现对帆板系统的控制。该系统主要由键盘模块、显示模块、风扇驱动模块、角度测量模块、报警模块组成。角度传感器测量帆板的角度并反馈回单片机,通过增量式PID算法计算,并由PWM方法控制风扇的转速,从而实现精确控制风扇风力与帆板角度。     

基于PSoC的圆度误差数据采集系统

详细论述了以嵌入式片上系统PSoC为核心的圆度误差数据采集处理系统的软硬件设计.该系统灵活运用PSoC片上系统内部集成的定时模块、计数模块和全双工模块,以及外部中断和I/O等片上资源,通过使用定时模块来控制圆度误差信号的采样频率;采用计数模块与全双工模块相结合的方法来实现下位MCU同PC的串口通信,完成人机交互;同时,采用光电传感器来触发MCU的外部中断,控制测量的起始点,避免了不封闭测量和重复测量的出现.     

基于单片机的智能温控风扇系统

本设计是由STC89C51单片机控制,采用DS18B20温度传感器、人体红外传感器模块和数码管设计而成的智能温控风扇系统。该系统通过脉冲宽度调制,实现了风扇系统在有人的情况下依据当前温度区间自动启停以及调节风扇转速等功能。该设计具有功耗低,实用性强等特点。     

基于MQ烟雾检测模块研制自动排烟风扇系统

此次设计是基于MQ烟雾检测模块进行研制了一种自动排烟风扇系统。系统主要是通过采用MQ烟雾检测模块对所处的环境内的烟雾浓度进行检测和测量,主要是将测量的浓度值同系统内部预先设定值进行对比。如果采集数据的浓度值大于设定值,排烟风扇电机自动启动并可以根据烟雾浓度自行调整风扇转速。烟雾采集值小与设定值后就开始关闭,并且确保系统时刻处于最佳工作状态。此次设计通过硬件设计和软件设计进行实现和研究的,系统的设计原理简单易懂、使用方便、而且在实际生活应用中易于实现。     

基于单片机的帆板自动控制系统设计与实现

以STC89C52RC单片机为控制核心、PID算法中的积分分离算法、遇限削弱积分算法和PWM调速法中的定频调宽法为风扇转速调节的理论基础设计实现帆板控制系统。系统主要包括主控模块、角度检测模块、风扇驱动模块、A/D模块、L C D显示模块、声光提示模块、按键模块等。经测试该系统执行速度快、具有更大的灵活性和更低的成本,各项性能指标均达到了设计要求。     

PSoC的电容式非接触感应按键设计

非接触式操作界面正逐渐取代普通按键，成为常用的人机交互工具。使用PSoC片上系统芯片CY8C2714，结合电容式感应原理，可设计一种基于PSoC微处理器芯片的电容式感应按键，实现按键的非接触式可靠设计。PSoC片上系统芯片是具有高速内核、快闪内存和SRAM数据内存的高性能芯片，具有独立的程序存储器和数据存储器总线，设计者可自配置模拟模块和数字模块。     

腕戴式集成电气测量测试系统原型设计

以PSoC5 LP为硬件开发平台,以PSoC Creator为软件开发平台,构建集成示波、频谱分析、信号(波形)发生以及信息交互功能的系统.显示外设采用Memory LCD,频谱分析通过快速傅里叶变换(FFT)实现,根据真任意波形发生技术(Ture arb)实现信号发生,扩展CC2541蓝牙模块实现与移动终端的信息交互.系统原型集成采用有限状态机实现多种功能,并用物理按键进行操作和切换.初步完成了集成有4种功能的腕戴式电气测量测试系统,达到了设计要求.     

基于PWM调速技术的智能温控风扇系统

由于绝大多数的风扇均采用纯人工的操作方式,无法实现灵活操作,所以难以满足人们日益多样化的需求。在本设计中,综合利用了红外遥控技术、PWM调速技术、单片机、LCD1602液晶显示模块和DS18B20温度检测模块等,实现了对风扇运行状态的远程调控、温度实时检测和显示及风扇转速的自动调节等功能。     

基于PSoC的数控运动控制器

采用PSoC可编程片上系统设计了一个数控运动控制器,由于PSoC具有灵活的可自由配置的模拟、数字资源和输入输出接口以及对多种通信接口的支持,该运动控制器具有良好的可扩展性和可移植性。介绍了系统的整体结构、控制器的硬件模块设计以及直线、圆弧、Nurbs曲线插补方式和速度控制方案的软件实现,使用该控制器控制一台三轴雕刻机进行雕刻,结果表明该系统具有良好的性能。     

基于MULITIPROG的PID控制器在温控系统中的应用

以ADAM-5510kW及外部I／O模块构成的温度控制系统为研究对象，设计一个基于MULITIPROG编程系统的Fuzzy—PID控制器，对温度采集和风扇转速控制模块进行编程，用软件方式实现了该对象的PID控制；阐明利用凑试法整定PID参数的具体步骤，通过逻辑分析器对Kp及Ti等参数值进行调整，解决了系统振荡问题。结果表明：该控制器响应速度快、精度高，可应用于各种流量、压力、液位等参数的软逻辑控制系统。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

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.     

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。     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Call for papers Special issue on Modeling and control technologies for civil,energy,and power systems

正The control of civil,energy,and power systems presents significant new challenges for modeling and control theory.The purpose of this special issue is to provide a forum for researchers and practical engineers to discuss the recent advances in modeling and control technology development for civil,energy,and power systems.Prospective authors are invited to submit their original contributions with the focus on theory or applications of modeling,control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate and promote academic exchange between Chinese and foreign scientists everywhere.