综合客运枢纽信息系统需求分析和框架体系研究

信息一体化是现代综合客运枢纽的基本特征之一,通过借鉴国外枢纽信息系统的发展经验,从旅客、管理者、运营主体等用户群角度,对我国综合客运枢纽信息系统的需求及功能进行分析,界定了枢纽信息系统与各交通方式信息系统的区别与联系,明确了枢纽信息系统作为"共享、协调、服务"(SCS)信息平台的内涵和定位,从而提出了枢纽信息系统"一个平台、两大应用、三个保障体系"的基本框架,并进一步给出了实施建议。     

车辆限速装置的技术要求及性能比较

介绍车辆限速装置的类型及其在车辆中的使用;阐述车辆限速标准要求,并通过对某客车分别进行发动机ECU指令控制的限速试验和机械式限速器控制的限速试验;对比分析两者的性能,并提出建议。     

适应客车用户特殊要求的电路设计

通过对不同地区、不同客户特殊要求的分析，设计了几种特殊电路，并详细地阐述了电路的设计思路与原理。     

封控作战中对目标火力打击炮兵需求分析

针对火力打击的目标种类,本文的炮兵需求分析是建立在定性和定量相结合的基础上,从微观的角度,主要对导弹阵地、机场、港口等目标类型进行分析计算,确定毁伤指标。依据计算程序并充分考虑封控作战的特点计算炮兵兵力需求量。     

航标维护管理工作和发展的设想

介绍海南省港航管理局航标维护管理工作与工作要求,对其存在的问题进行了分析,并提出了一些解决问题的设想.     

Electric vehicles: How much range is required for a day’s driving?

One full year of high-resolution driving data from 484 instrumented gasoline vehicles in the US is used to analyze daily driving patterns, and from those infer the range requirements of electric vehicles (EVs). We conservatively assume that EV drivers would not change their current gasoline-fueled driving patterns and that they would charge only once daily, typically at home overnight. Next, the market is segmented into those drivers for whom a limited-range vehicle would meet every day’s range need, and those who could meet their daily range need only if they make adaptations on some days. Adaptations, for example, could mean they have to either recharge during the day, borrow a liquid-fueled vehicle, or save some errands for the subsequent day. From this analysis, with the stated assumptions, we infer the potential market share for limited-range vehicles. For example, we find that 9% of the vehicles in the sample never exceeded 100 miles in one day, and 21% never exceeded 150 miles in one day. These drivers presumably could substitute a limited-range vehicle, like electric vehicles now on the market, for their current gasoline vehicle without any adaptation in their driving at all. For drivers who are willing to make adaptations on 2 days a year, the same 100 mile range EV would meet the needs of 17% of drivers, and if they are willing to adapt every other month (six times a year), it would work for 32% of drivers. Thus, it appears that even modest electric vehicles with today’s limited battery range, if marketed correctly to segments with appropriate driving behavior, comprise a large enough market for substantial vehicle sales. An additional analysis examines driving versus parking by time of day. On the average weekday at 5 pm, only 15% of the vehicles in the sample are on the road; at no time during the year are fewer than 75% of vehicles parked. Also, because the return trip home is widely spread in time, even if all cars plug in and begin charging immediately when they arrive home and park, the increased demand on the electric system is less problematic than prior analyses have suggested.     

AIS操作培训与发证探讨

国际海事组织发布了AIS船上应用导则(A.917(22)号决议案)及其培训标准,以及国际灯塔协会对VTS操作员培训标准评估指南。要求使用者必须熟悉AIS的性能和有关缺陷。鉴于此,讨论了培训和发证方法,为海事安全管理机构、船公司和海运院校提出了一些建议。     

国防公路梁式桥快速加固新技术的军事适用性分析

目前,我国为数众多的国防公路梁式桥不能满足军用重装备的通过要求,且现有的加固技术往往不能满足快速性等军事适用条件。鉴于此,分析了我国国防公路梁式桥快速加固存在时效性、操作性、可靠性、安全性四项军事需求。介绍了三种梁式桥快速加固技术：基于摩擦一胶接机理的混杂锚固系统（HB—FRP）、截面转换加固钢筋混凝土T（或П）形梁桥技术和钢结构拱形桁架技术,并简要分析了三种技术的军事适用性,对于国防公路梁式桥抢修加固具有一定的借鉴意义。最后简要阐述了对国防公路梁式桥快速加固的几点思考,对国防公路梁式桥抢修加固技术的发展起到一定的参考作用。     

国外薄层聚合物混凝土罩面在水泥混凝土桥面上的应用

国外薄层聚合物混凝土罩面具有恒重小、抗滑性能好、使用寿命长等优点。文章以国外相关研究成果和使用经验为基础,介绍薄层聚合物混凝土罩面的典型结构、材料要求和施工工艺,以为我国同类工程提供借鉴。     

交通标志在我国城市道路中的应用分析

交通标志作为指引交通、改善交通环境的重要设施,在我国交通管理中的作用日益突出.介绍我国交通标志的分类、设置原则和要求,并结合南昌经济技术开发区的实际情况,对我国城市交通标志设置中存在的不足进行了分析,以供同行参考.