独立CAN器件SJA1000的应用

CAN总线已在变电站自动化系统中得到了广泛应用 ,而SJA10 0 0作为PHILIPS公司最近推出的独立CAN器件也已得到了广泛关注。本文简要介绍了SJA10 0 0的基本原理和功能 ,并给出了SJA10 0 0的典型硬件连接原理图及初始化程序和部分通信程序     

基于CAN总线的隧道通风监测系统设计

为了实现隧道通风监测系统的高安全可靠性、远距离信息传输、多节点网络监测等要求,提出了基于CAN总线 技术的隧道通风监控系统。设计了基于CAN总线技术的控制系统硬件结构,介绍了烟雾和温度检测原理;设计了基于 CAN总线的通风系统监测节点;设计了工控机与CAN总线通信接口适配卡;设计了系统主程序、事件检查和处理子程序 的流程图。应用结果表明该系统具有传输距离远、监测网络节点多等特点,大大提高了系统的实时性和可靠性。     

基于指纹识别技术的网络式门禁系统设计

门禁系统的智能化是实现智能小区的重要一环。文中提出了基于指纹识别技术和CAN总线技术的小区门禁管理系统的设计方案和具体功能模块的实现方法，并介绍了系统中的指纹门禁单元和门禁主控制器的管理程序流程图。     

基于CAN总线的生命科学仪器硬件系统设计

本文较为详细地论述了CAN总线的工作原理、特点、常用接口器件和CAN节点构成方法及配置原则。并重点论述了CAN总线在生命科学仪器中的应用设计思想和使用技巧经验。     

‘We Can All Just Get on a Bus and Go’: Rethinking Independent Mobility in the Context of the Universal Provision of Free Bus Travel to Young Londoners

This paper uses qualitative data from interviews with 118 young Londoners (age 12–18) to examine how the universal provision of free bus travel has affected young people’s independent mobility. Drawing on Sen’s capabilities approach, we argue that free bus travel enhanced young Londoners’ capabilities to shape their daily mobility, both directly by increasing financial access and indirectly by facilitating the acquisition of the necessary skills, travelling companions and confidence. These capabilities in turn extended both opportunity freedoms (e.g. facilitating non-‘necessary’ recreational and social trips) and process freedoms (e.g. feeling more independent by decreasing reliance on parents). Moreover, the universal nature of the entitlement rendered buses a socially inclusive way for groups to travel and spend time together, thereby enhancing group-level capabilities. We believe this attention to individual and group capabilities for self-determination provides the basis for a broader and more child-centred view of independent mobility than the typical research focus upon travelling without an adult and acquiring parental permissions.     

高句丽五部研究

中、朝史书对高句丽五部的名称记载虽不同 ,但却可以发现两种史料间的对应关系。高句丽五部以夫余人为主 ,融合了秽貊及部分汉族。各部的部长都不止一人 ,且地位不是平等的。在高句丽建国之初 ,五部的部长拥有行政、军事、司法等方面的权力 ,既是领主 ,也是中央官。随着对外扩张中高句丽国家机构的完善 ,五部的部长逐渐演变为地方官 ,形成五耨萨制 ,各方面权力受到制约。五部也不再强调部族的意义 ,而是成为行政区划概念。     

A Single Garbage Can Model and the Degree of Anarchy in Japanese Firms

This paper refreshes an empirical examination ofthe garbage can model, particularly in a sample drawnfrom Japanese firms. The garbage can model oforganizational decision making was originally developed by Cohen, March, and Olsen (1972) to describeorganized anarchy. This paper incorporates twomethodologies in an attempt to both validate and extendthe garbage can model: Simulation is first used togenerate a research hypothesis, then several surveys areconducted to test that hypothesis and to empiricallydevelop an ex-post model of decision ambiguity, flight,and anarchy. The data support our hypothesis and we find out new conditions of ambiguity:(i) fluid participation, (ii) divorce of solution fromdiscussion, and (iii) job performance rather thansubjective assessments, which are clearly related to the simulation assumption of our single garbagecan model. By using our new conditions of ambiguity, wedevelop a measure of degree of anarchy, and theregression analysis indicates a linear relationship between the flight ratio and the degree ofanarchy.     

公交车辆在中途站点的排队论分析

公交站台停靠区的排队问题决定了公交车辆的通行能力。把公交中途站台与公交车辆模拟成一个单服务系统、公车到达率 ,两服务率 、 的负指数分布的排队M/M/1/N系统。根据排队论理论,实测计算了北京中关村海淀黄庄、人民大学站点公交车辆排队队长,站内逗留时间等参数。结论为：城市主干道关键站台改造为主、副双公交站台制式以及调整公交线路布设,优化各线路发车频率是花费成本低,畅通成效大的解决站点塞车排队的方法。     

对重庆市区建立巴士快速交通的探讨

介绍巴士快速交通系统的由来、优点以及在世界各国中的成功范例。巴士快速交通系统是解决城市交通问题的革命性方案。阐明巴士快速交通系统在重庆市实施的前景。     

I^2C总线技术在彩电中的应用

I^2C总结技术是目前大屏幕新型彩色电视机广泛采用的新技术，它使彩色电视机的电路结构发生了很大的变化。本文论述了I^2C总线控制系统的组成特点以及在新型彩色电视机中的应用。