汽车安全性能微机测控系统的设计与实现

本文以保定汽车制造厂出厂车检测系统的开发实践为例子，阐述了采用分级分布式微机控制的汽车安全性能自动测控系统的构成原理，各部分的功能，系统的通讯技术，软件结构及系统的可靠性措施     

基于全连接神经网络的车辆短预瞄电磁导引方案

电磁导引是一种车辆自动导引方案,广泛应用于工业、物流等领域.为解决现有电磁导引方案对车辆机械结构要求较高、易受传感器预瞄距离短的限制、难以应用于小型自动导引车辆的问题,提出了一种基于全连接神经网络的导引方案.通过数据分析寻找有限预瞄距离内的最优传感器排布方案,设计和训练全连接神经网络模型,对车身姿态及车后道路的信息进行...     

红外导引系统高低温跟踪性能测试技术

跟踪性能是红外导引系统的重要技术指标,随着使用环境的日益复杂,红外导引系统的高低温性能变得越来越重要;为保证产品质量,生产过程中必须加强对红外导引系统的高低温性能检测;利用先进的自动测控技术,外加红外目标模拟器、转台、通用标准设备、工控机等组成硬件系统,在专用测试程序的控制下,实现红外导引系统高低温跟踪性能的自动检测;实践证明,利用该技术的测试系统性能可靠,使用维护简单方便,极大地提高了产品的测试精度和效率,具有较显著的效益。     

电动阀综合测控仪的研究与设计

介绍了电动阀综合自动测控系统的软硬件组成、主要功能及其技术特点.该系统实现了传感器多路信息融合的高速高精度采集、多路输出控制功能,并通过传感器实现步进电机自动闭环和开环等调控模式.试验表明,该系统满足实际需要,具有很好的可靠性和实时性.     

基于ARM11的自动导引车系统设计与实现

阐述了基于S3C6410的自动导引小车系统,在Linux环境下进行系统开发,完成了驱动程序和应用程序开发。通过研究图像采集与处理的多线程处理模式,实现了自动导引小车实时图像导引,进而编写了测速传感器、避障传感器、直流电机驱动器的驱动、PWM驱动。通过网络通信模块实现了AGV与客户端信息交互,实现QT远端监控。实验表明,图像处理采用多线程处理方式,效率提高了100%,自动导引小车系统具有良好的图像导引功能,PWM和PID联合使用使小车运行平稳,转弯灵活。     

基于Web服务的网格化智能Agent传感器研究

网格智能化测控是测控技术的一个新的发展方向,传感器作为网格测控系统的一个独立节点,具有网格和某种智能功能是必要的;网格化技术可以实现网络传感器节点的自主管理,分布式计算、测试,以及对测试数据的智能化处理,但如何实现网络传感器的网格化是一大技术难题;文章在ARM9微处理器为核心的硬件环境下,基于嵌入式Web服务技术,采用智能Agent技术和嵌入式Web服务开发工具gSoap实现了网络传感器的智能化和网格功能,并给出了系统性能的测试结果。     

YLKJ-3000数字化粮情监控系统性能测试

针对YLKJ-3000型数字化粮情测控系统性能进行了相关试验,介绍了数字式温度湿度传感器、数字总线远程采集单元、PLC自动控制器、系统软件和测试结果等。实际运行结果表明:该系统具有技术先进、灵敏、稳定可靠、兼容性好。     

CAN总线技术在智能汽车系统中的应用

智能汽车是一种具有自动驾驶功能的汽车,它综合应用了计算机、控制、信息处理、通讯以及传感器等多种技术。使用CAN总线保证了系统内部数据交换的高速性和可靠性。引入了一种带有CAN总线接口的单片机--PIC18F258,介绍了它CAN模块的结构及其在完成通信任务时的工作原理。该方法在人工智能和工业测控领域具有一定应用价值。     

试论单片机在温度测控方面的应用

温度测控在工业领域具有广泛的应用,随着传感器技术、微电子技术、单片机技术的不断发展,为智能温度测控系统测控功能的完善、测控精度的提高和抗干扰能力的增强等提供了条件。由于单片机具有集成度高、功能强、体积小、价格低、抗干扰能力等优于一般CPU的优点,因此,在要求较高的控制精度和较低成本的工业测控系统中,往往采用单片机作为数字控制器取代模拟控制器。本文将介绍一种基于AT89C52和AT89C2051双MCU的注塑成型温度测控系统,及其硬、软件的设计方法和系统的原理框图等。     

粮情测控技术及其发展

介绍了粮情测控系统及技术现状,简要论述了传感器技术、计算机技术、通信技术及控制技术的发展及在粮情测控系统中的应用情况,同时对粮情测控系统及技术的发展趋势进行了分析。相信随着科学技术的不断进步,此项技术不断发展,粮情测控技术必将向数字化、多功能继承化、自动调控、数据通信无线化和远程传输方向发展;而粮情测控产品的生产、安装和验收也必将趋于模块化、标准化和规范化。     

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.