AT90CAN128的有轨电车检测器设计

本设计以AT90CAN128为控制核心,利用其输入捕捉单元对线圈频率的变化进行检测,使用CAN通信接口将检测结果实时传送,来实现车辆存在与否的可靠检测.本设计将应用于现代有轨电车轨道占用检查子系统中,实现在道岔处对轨道占用的检测,来保障电车的安全行驶和运营调度系统的高效运行.     

SMT封装电路板三维在线检测技术

为了检测回流焊接之后SMT( Surface Mount Technology)封装电路板是否存在缺陷,设计并搭建了基于线结构光传感器的SMT封装电路板三维在线检测系统,通过线结构光扫描测量,获取SMT封装电路板表面三维数据。采用双传感器测量技术,有效减少数据丢失;研究了双传感器统一标定技术,可同时实现两个传感器的参数标定和坐标系统一。提出了自适应光条中心提取算法,对反射或散射影响而形成的光条图像噪声具有很好的抑制效果,能够提取准确的光条中心。实验表明系统测量精度可达到0.02 mm。系统测量得到的三维数据,可以为在线检测SMT封装电路板缺陷提供可靠的三维信息。     

基于ACCESS的产品实时库存及质量检验管理系统

为使产品库存和产品质量检验数据管理规范化、便捷化,并且在企业内部局域网实现数据共享,对企业的库存管理方式和产品质检过程进行充分调研,针对中小型机械制造类企业的实际需求,利用Microsoft Access 2003开发了产品实时库存及质量检验管理系统。实践证明,该数据库系统解决了企业旧的台账管理方式中数据处理机械化、低效率问题。     

北京轨道交通燕房线（主线）工程阎村北停车场停车列检库工艺设计

北京市轨道交通燕房线为全自动无人驾驶线路,停车场内停车列检库也纳入了无人驾驶线路中进行管理。这对停车列检库的设置提出了一些新的要求。从停车列检库的设置规模、形式和全自动无人驾驶的特点进行了阐述,并提出了停车列检库的工艺设计,以满足平日车辆停放、列检和全自动无人驾驶的需求。     

网络流量实时监控分析系统的设计与实现

网络流量监控分析是网络管理与网络安全的重要组成部分。文章介绍了一种基于深度报文检测技术的网络流量实时采集分析系统RT-TMA,同时给出了其设计框架和关键技术实现方法。测试结果表明,该系统运行稳定、准确,可以达到预期效果。     

Microsoft Windows vs. Apple Mac OS X: Resilience against ARP cache poisoning attack in a local area network

ABSTRACT

Robust security measures are integrated into new release versions of operating systems (OSs) to ensure that users have a more secure and reliable environment in which to run their daily tasks. In this article, through extensive practical experiments, we evaluate and compare the resilience of popular versions of Microsoft Windows OSs and Apple Mac OS X against Address Resolution Protocol (ARP) cache poisoning attack in a local area network (LAN). The experimental results demonstrate clearly that all tested versions of Windows OSs and Apple Mac OS X are vulnerable to the ARP cache poisoning attack, and do not deploy built-in efficient security features to prevent success of this attack. In addition, the experimental results directly contradict the common belief that Windows OSs are always less secure than Apple OSs. On the other hand, the article analyzes the efforts that have been made and the different methods that have been applied to detect and prevent ARP cache poisoning attacks. The article shows that none of these efforts and methods has been able to give satisfactory results.     

阿涡夺水库坝基渗漏分析与处理

阿涡夺水库工程位于西藏自治区隆子县境内,隆子河左岸支流容扎曲的中游河段.技施阶段施工期间先后进行了2次大坝帷幕灌浆.2003年施工期帷幕灌浆按照技施阶段设计施工图施工;2005年10月大坝临时下闸蓄水,发现坝下多处出现渗水情况.文章针对渗水情况对地质条件进行分析和评价,详细介绍了施工所选择的合理方案,及最终取得的成果.     

严寒高地下水位地区检查井结构设计

针对北方严寒高地下水位地区,检查井在冬季运行期间,由于地下水的渗透,经常被冰层覆盖,无法正常运行的问题,采用焊接钢板成箱式检查井,使其密封不透水,从而有效地解决了严寒高地下水位地区检查井的冻胀及结冰病害问题.     

质量检测行业在水利工程后期的现状及发展方向

水利工程建设期间成立的各种质量检测机构在工程后期都面临着检测任务减少,投入减少,生存和发展受到严峻的考验。企业走向新的工程或者走向城市建设检测市场是未来各个水利质量检测机构发展的方向。     

Design of a Rotary Ring APP Information Capturer for Sightseeing PlacemSpecialized Tourism Services for Sun-Moon Lake

The APP （Application） store at the Android market is very popular and attractive for most of current smart phone users. A rotary ring type of APP named as Loving SML （Loving Sun-Moon Lake--＂爱上日月谭＂） is an instant information capturer to capture the instant traffic tourism information （info） services and serve as an interactive device for user to know the instant traffic information of SML area where you may want to go. The tourism service is specialized on i3 travel, which is identified as innovation, intelligent, and interesting for all of the visitors coming from all over the world. The captured instant information is provided by the sightseeing cloud from SML-NSA （National Scenic Area） with the integration of infrastructure of VD （vehicle detector）, CMS or VMS （changeable （or variable） message sign）, CCTV （closed circuit television）, AVI （automatic vehicle identification）. The technique of AR （augmented reality） is also used to identify how many sparkling places in front of you that you may visit. One can easily know the road performance ahead from you before you plan a trip.