RFID发展时代邮政业的挑战和机遇

本文介绍了邮政业应用电子标签的历史和应用中存在的问题及其解决办法,分析了第二代身份证和交通一卡通为其带来的新问题,最后指出了机场应用电子标签为邮政业带来的商机和挑战。     

一种机场终端区飞机排序问题的蚁群算法研究

飞机排序问题（ASP）属于NP难问题，解决比较困难．本文首先将ASP表示成一个特殊的车间作业调度问题（JSP），以减少着陆飞机队列完成时间为优化目标，设计了求解ASP的蚁群算法．通过正交试验确定了ASP蚁群算法的最佳性能参数组合．通过比较FCFS调度方法和ASP蚁群算法对不同航班队列的排序结果验证了ASP蚁群算法求解问题的可行性和求解效果．结果表明，ASP蚁群算法优于FC舟调度方法，可以使着陆队列完成时间减少约14％．ASP蚁群算法的CPU时间较短，可以在合理的时间内求解出合适的飞机队列，为实时在线的自动化交通管制提供了支持．     

One airport detection method based on support vector machine

This paper proposes a novel airport detection method, which integrates the texture features and shape features of the airport. Eight texture features, such as the mean of the region, the deviation of the region, the smoothness of the region, the skewness of a histogram, the uniformity of the region, the randomness of the region, the mean of the gradient image and the deviation of the gradient image, are used to represent the features of the region. In this method, first the long lines are detected and the regions where the lines locate are segmented. Second, support vector machine (SVM) based on Gaussian kernel is used as a classifier which discriminates the runway from other candidate regions. Experimental results show that the error rate of the proposed method is lower than those of conventional methods which detect airport only by the shape feature of runway. The detection accuracy of the proposed method is nearly ten times higher than that of Liu’s methods, and the method has favorable speed for a real-time system. __________ Translated from Journal of Xi’an Jiaotong University, 2006, 40(6): 709–713 [译自: 西安交通大学学报]     

机场高端旅客服务设施

机场高端旅客服务设施是机场建设的重要组成部分,也是体现机场服务水平和实现盈利的重要手段,因此近年来越来越受到机场建设方的重视.本文通过对高端旅客服务设施的分类、流程、建设地点、装修及与国外比较的区别和不足等方面的介绍,反应出国内目前在此方面的现状和发展趋势,并希望能够形成一定的规范及标准.     

Analytical evaluation of aircraft operational risks from runway rutting

Runway surface distortions such as rutting allow water to accumulate on the runway surface which may cause aircraft operational risks related to hydroplaning and loss of friction. This may increase the runway excursion risk during wet weather conditions. Several standards relating to airfield pavement maintenance have documented that rutting can cause safety hazards to aircrafts due to hydroplaning risk. This paper proposes an analytical approach to evaluate the hydroplaning potential for aircrafts due to the flooded ruts of a runway pavement and evaluate the operational risk. A finite element model is developed to simulate aircraft tyre hydroplaning under given set of operating conditions. By performing this evaluation for different rut depths, an assessment of the relative severity levels of different rut depths with respect to hydroplaning can be made. A numerical example is presented to illustrate the application of the procedure to evaluate operational risks to aircraft from runway rutting.     

道面聚丙烯纤维混凝土的耐久性研究

为了研究聚丙烯纤维对道面混凝土耐久性的影响,应用冲击、碳化、抗老化、抗硫酸盐和耐磨等试验方法,进行了素混凝土和聚丙烯纤维混凝土的对比试验,研究了聚丙烯纤维的作用机理.结臬表明:聚丙烯纤维能有效地提高道面混凝土的抗冲击能力和耐磨能力,有效地控制道面混凝土的碳化,降低了硫酸镁溶液侵入,聚丙烯纤维道面混凝土不存在老化问题.     

岩溶、土洞发育地区大型机场桩基础施工技术

以实际工程为例,概述了超长桩基在岩溶、土洞发育地区的施工难点,并针对施工难点提出了改进措施。详细介绍了岩溶、土洞的处理方法和桩基施工技术,实践结果表明,在岩溶地区桩基采用冲孔的办法进行处理,既满足质量要求,又可以缩短工期、降低成本。     

KEBBI机场航站楼钢屋架吊装方案

近年来,以塔吊为主、履带为辅的钢屋架安装技术应用日趋普及,已被广泛应用在各种复杂结构的工程项目中,为工程施工提供了方便。在KEBBI机场航站楼施工建设中,整个建筑结构是以钢屋架为主,施工中为了加快施工进度、优化现场操作,需要提前设置出合理的吊装方案。论文深入阐述了KEBBI机场航站航站楼钢屋架吊装方案的设置技术要点。     

机场航站楼扩建项目火灾防控实例分析

民用机场航站楼特有的大空间性质,决定了火灾防控难度较大。目前,我国尚未出台民用机场航站楼设计防火规范。本文以一起改造工程为例,从安全适用、技术先进、经济合理的原则出发,全面分析火灾防控重点问题,并针对提高航站楼自身消防安全水平提出合理建议。     

机场新铺沥青道面多种降温方式的试验研究

基于提高新铺沥青道面降温效果的目的,采用洒水、干冰以及自然方式对机场新铺沥青道面进行了降温试验研究,并通过对各种方式的对比分析,指出使用洒水降温方式效果最好,持续时间最长。