用Authorware构建多媒体学生管理系统

利用多媒体创作软件Authorware7.0以及数据库Access创作学生管理系统.文中给出了创作的主要流程线图以及主要的程序代码.     

A new methodology of mobile robot navigation: The agoraphilic algorithm

The Agoraphilic algorithm is an optimistic approach to reactive path planning for mobile robot platforms. The technique uses virtual, attractive forces derived from the surrounding free space. Fuzzy logic is utilised to limit the ‘free-space’ force so as to promote the movement towards the goal. The algorithm was designed to be a robust technique for reactive navigation that could be implemented without the fuss of tuning the sensitive parameters required for other classical navigation routines. Several simulations plus some preliminary experimental results are presented here to demonstrate the algorithm's potential.     

Tools and strategies for searching in hypermedia environments

Abstract This paper presents the results of several investigations into the use made by students of a prototype system of help for the exploitation of hypermedia documents. This prototype was derived from a common type of educational CD-ROM in which the presentation of the contents was improved and certain research and note-taking tools added. The evolving, personalised note-taking system interacts constantly with the environment being explored. Beyond the storage of personal notes (clues, personal knowledge of the area), it allows the student to keep the explored sections in mind and ultimately to plan further explorations. It also enables the extraction and structuring of the data retrieved from the body of the database. The role of this system is to facilitate more thorough searches for information which might sometimes require several sessions stretched out over a long period. It could be profitably used in the context of independent student activities.     

Development of a Robotic System which Assists Unmanned Production Based on Cooperation between Off-Line Robots and On-line Robots. Part 3. 1 Development of an Off-Line Robot, Autonomous Navigation, and Detection of Faulty Workpieces in a Vibrating Parts Feeder

Remarkable advances in robotics and intelligent technology have made unmanned production realisable. Based on the off-line robot concept proposed in our first paper, an off-line robot and peripheral devices have been developed for the realisation of unmanned production. The developed robot has a power-wheeled steering (PWS) type mobile platform on which a double-arm manipulator is installed. In order to detect and recognise 3D objects, double CCD cameras are mounted on the top of the robot. Two types of robot end-effectors are developed to handle workpieces and conduct trouble shooting actions. A newly developed production trouble simulator is very useful in simulating and resolving production troubles. A virtual pilot plant for production composed of the off-line robot, two on-line robots, a vibrating bowl feeder, a belt conveyor and a production trouble simulator has been constructed and tests for production simulation have been undertaken. In this paper, autonomous navigation of the developed robot in the virtual pilot plant is investigated. Then a search for faulty parts in a parts feeder using the developed real-time image extraction method is carried out.     

卫星导航定位系统服务安全控制技术研究

随着卫星导航定位系统的快速发展，针对日益增长的巨大数量的终端用户进行有效可控管理的安全需求，文章分析了GPS、GLONASS等系统终端用户控制管理技术的现况，提出了一种基于时效控制参数分散的安全控制技术，并对应用前景予以探讨。     

钢筋混凝土框格喷射植被混凝土护坡绿化技术

钢筋混凝土框格喷射植被混凝土护坡绿化技术,是先在开挖坡面上挂网、现浇钢筋混凝土框格梁,然后在框格内喷射植被混凝土以达到护坡绿化目的的技术.本文结合富金坝航电枢纽工程岩石边坡绿化的工程实际,具体介绍该技术的施工工艺,以及所取得的护坡绿化效果.     

DDS/PLL在频率合成中的应用

介绍了直接数字频率合成(DDS)技术和模拟锁相(PLL)技术相结合的应用,它是频率合成中一种新的应用,具有体积小、频率稳定可靠、相位噪声低、转换时间快等优良性能。对丰富的杂散进行抑制后,DDS信号在实际应用中可达到理想的效果。     

IMT-Adv: Is There a Role for Satellites?

The present paper is intended to discuss the satellite features which could lead to beneficial integration with IMT-Adv. The satellite roles are consistent with: (1) Navigation for Location Based Services (2) Earth observation for GIS-related applications/solutions and (3) Telecommunication. The development of the market is also boosted by the emerging synergies between navigation, communication and information technology in what is called “info-mobility”. The area of discussion is therefore quite wide and we can offer a survey trying to analyse only the aspect which are pertinent with the title of the paper. We therefore apologise if the reader cannot find all information he could be interested in, but we hope to have been capable to close just a bit of the enlarging gap between terrestrial and satellite interests.

对大功率LED车灯芯片结温部分关键影响因素的研究

针对LED车灯芯片照明过程中结温过高的问题,文中对影响芯片结温高低的两种关键因素:LED车灯芯片内部发光源间距和芯片排布间距进行研究,以求有效降低芯片结温。通过ANSYS Workbench16.0软件进行芯片热仿真模拟,随后利用恒温测试平台对仿真结果可靠性进行了验证。验证结果表明,合理设置LED车灯芯片内部发光源之间的间距能有效降低芯片结温,最高可降低8.249 ℃;同时,适当增加LED车灯芯片之间排布间距亦可有效降低结温0.5 ℃。     

Architecture in China and the Meaning of Modern

What is generally understood by Modern architecture in China is set to be re-evaluated across the world with a major exhibition this summer at the RIBA in London and a significant new book by Edward Denison and Guang Yu Ren. Here co-author and co-curator of Modernism in China, Edward Denison , outlines why we need to look back to China's Modernist roots in the early 20th century if we are to understand the intense modernisation of the present. Copyright © 2008 John Wiley & Sons, Ltd.