基于B／S结构模式的图书馆电子阅览室管理系统设计与实现

在评析传统的图书馆阅览室数据管理模式的基础上，提出了基于B／S模式的管理系统结构模型，并对B／S模式进行了简要介绍，对JSP技术进行了探讨，着重阐述了系统的基本功能以及系统的实现。     

Agent-Mediated Electronic Commerce

Electronic commerce has been one of the traditional arenas for agent technology. The complexity of these applications has been a challenge for researchers that have developed methodologies, products, and systems, having in mind the specificities of trade, the interaction particularities of commerce, the strict notion of commitment and contract, and the clearly shaped conventions and norms that structure the field. In this paper I survey some key areas for agent technology which, although general, are of special importance in electronic commerce, namely, solid development methodologies, negotiation technologies and trust-building mechanisms. I give examples of systems in which I have directly participated, although I also try to refer to the work of other AgentLink Special Interest Group members over the last few years.     

用单片机实现各音色电子琴

介绍了音色概念以及音色的决定性因素。针对传统电子琴采用以滤波网络电路对某次谐波量进行放大或衰减来模拟音色的方法,提出了一种新的实现方案,即采用以单片机为主体的数字电路,"软硬"兼施,模拟音色的波形,再通过D/A输出,从而达到听觉上的模拟音色的目的。解决了传统的模拟音色电子电路的设计的复杂性和多变性问题。给出了具体的实现电路、软件设计方法和步骤。     

Comments on the sliding wear of metals

The author reviews selected experimental results which have contributed to improved understanding of sliding wear processes. The emphasis is on the chemical and structural changes which occur at and near the surface of metallic materials during sliding in different environments. The importance of plastic deformation, fracture, transfer, mechanical mixing, phase transformations and oxidation is discussed. Examples of transitions are described, and interesting correlations noted. In selecting the content of this paper, the author includes controversial results and conclusions and raises questions about the development of wear equations, interpretations of the wear coefficient, the importance of adhesion, the roles of hardness, the causes of transitions and the location of debris-producing cracks.     

Influence of Conductivity of Slag on Decarburization Reaction

By altering the electrochemical properties of slag, the decarburization reaction of Fe3+-based slag withFe-C droplet was studied. The results showed that a lot of free electrons and holes exist in the slag containing transition metal oxides (such as TiO2 and Fe2O3). So electronic conduction in the slag increases. Finally, it led to the increment of the decarburization reaction rate between slag and Fe-C droplet, and mass fraction of carbon remaining indroplet decreases to a lower level.     

机动车身份自动检测系统

"机动车身份自动检测系统"(专利号ZL200710166583.5)基于射频识别(RFID)技术、图像识别技术、大型数据库技术等,在准确、快速、高效、自动的前提下,对机动车的真实身份进行识别,从而发现与机动车真实身份不符或相关的违法行为(包括假牌、套牌、涂改车牌、不进行年检、报废车辆等,或逃避购置税、车船使用税、保险费、运营车辆管理费及发现"黄标车"等)。在稽查方式上,由原来逢车必查的模式转变成针对问题车辆的稽查模式。本系统可以大幅提高我国公安、交通管理的水平,加强社会防控体系和维稳防恐体系的建设,促进减排,提高交通和社会安全,实现社会管理创新。     

电子衡器在中铝广西分公司矿山生产中的应用

电子衡器目前在国内工业企业中得到了广泛使用,文章从其原理出发,结合电子衡器在中国铝业广西分公司矿山部实际运行状况,阐述了该称重设备的使用与维护要领。     

装甲车辆新型电源管理系统研究

装甲车辆电源管理系统作为全车电气电子系统的能量分配枢纽,其性能直接影响各系统工作和车辆性能的发挥。装甲车辆传统配电方式存在供电品质差,自动化程度低,负载管理控制困难,电磁干扰严重等问题,难以满足系统要求。针对某型装甲车辆,设计了一种新型电源管理系统,分析了系统中电子开关设计与“软开关”控制、“热备份”控制、负载管理控制以及系统可靠性设计等关键技术,改善了系统供电品质、电磁兼容性和负载管理控制能力,为装甲车辆电源管理提供了一种可行的方案。     

电子战武器装备发展现状与展望

介绍了电子战武器装备在战争中的地位与作用,分析了目前国内外电子战武器装备的发展现状,同时展望了电子战武器装备的发展趋势。     

汽车空气流量传感技术现状与发展趋势

电喷系统是汽车的核心控制系统,它以空气流量传感器测量获得的进气量为依据确定喷油量与点火时间,从而使得燃料燃烧在理论空燃比附近,以实现更好的安全性、经济性、动力性以及更低的废气排放。因此,进气量的精确测量对汽车电喷系统具有非常重要的意义。介绍了汽车电喷系统空气流量传感技术的现状、存在的问题及发展趋势,并提出了一种采用平行平板电容原理结合涡街原理的传感方式。