Airline network competition: Full-service airlines, low-cost airlines and long-haul markets

The paper discusses airline network competition. Low-cost airlines and conventional airlines have distinctly different strategies and network types. This determines their ability to compete with other airlines in specific markets. The paper discusses the lack of competition between conventional airlines in local markets, and sees why low-cost airlines are the primary source of competition in such markets. Conventional airlines are relatively strong on long-haul markets, using their networks to keep costs per seat relatively low. Charter airlines show that a long-haul low-cost strategy is feasible For scheduled low-cost airlines, this may be more difficult, but this does not automatically mean that low-cost airlines cannot enter thick long-haul markets.     

高职“船舶避碰与值班”教学改革的思索

通过对《船舶避碰与值班》在教学与学生实习过程中存在问题的分析与探讨,提出对该课程教学改革的相关建议。     

Application of genetic algorithms for joint optimization of signal setting parameters and dynamic traffic assignment for the real network data

This paper presents the joint optimization of signal setting parameters and dynamic user equilibrium (DUE) traffic assignment for the congested urban road network. The simulation-based approach is employed to obtain the DUE condition for the case of multiple-origin multiple-destination traffic flows. The dynamic traffic assignment simulation program (DTASP), developed in C language is used to assign the traffic dynamically on the road network, whereas method of successive averages (MSA) is modified and used to arrive at the DUE condition. The artificial intelligence technique of genetic algorithms (GAs) is applied to obtain the optimal signal setting parameters and path flow distribution factor for DUE condition. The methodology developed in such a way that joint optimization of signal setting parameters with DUE is obtained. The proposed method is applied to the real network data of Fort Area of Mumbai city comprising of 17 nodes and 56 unidirectional links with 72 Origin–Destination pairs, where all the 17 nodes are signalized intersections. The traffic flow condition for the optimized signal setting parameters is considerably improved compared to the existing signal settings. The results prove that the GA is an effective technique to solve the joint optimization problem for the real network data.     

基于UG软件汽车仪表板凸出物快速查找

为了提高汽车被动安全性能,参考国标GB—11552中相关头部碰撞的标准,详细论述了利用UG软件的二次开发功能,确定仪表板水平线、头部碰撞区域及碰撞区内凸出物的方法。在此基础上开发出了快速确定仪表板碰撞区及碰撞区内凸出物的模块,通过简单仪表板模型测试,结果与实际情况基本一致,缩短了整车开发周期并降低了开发成本。     

铁路通信信号标准及基础资料在线查询系统简介

利用现有成熟的信息技术,实现对标准文件的统一集中、规范化、安全化管理,为所属技术、科研人员提供简便有效的标准、规范的获取途径。     

秦沈DC-7程控调度分机优化方案的分析与研究

分析秦沈线当前DC-7程控调度分机存在的问题,借鉴既有线电气化区段使用情况,提出合理优化解决方案。     

大学生网络生态文明的危机与构建

文章在阐述网络生态文明内涵的基础上，探讨了网络生态污染的种种表现及引起大学生文明失范现象，并从建设主流网站、加强污染院监控、培育监管队伍、加强宣传教育等方面提出了修复网络生态引导大学生文明成长的对策。     

以太网技术在列车通信网络中的应用探讨

基于现有列车通信网络(TCN)不能完全满足信息传输的情况,提出了工业以太网和CAN总线共存的方案,介绍了基于高性能数字信号处理器TMS320F206的工业Ethernet的硬件接口电路、CAN/Ethernet网关模型等。     

计算机联锁维修网络建设研究

根据TYJL系列计算机联锁系统在全路范围内广泛应用的实际,阐述了加强计算机联锁系统维修网络建设研究的必要性和现实意义.以基于服务、及时响应现场需求的战略为出发点,通过对选址、库存管理等领域相关理论的分析,提出计算机联锁系统维修网络建设研究中应采用的网络选址模型以及维修备件库存控制方法.     

同一水域两起船舶碰撞事故引发的思考

广州港沙角水域发生了两起大型拖带船组碰撞锚泊船的事故，其发生的时间、地点、性质有惊人的相似之处，本文从两起事故的共同点出发进行了详尽的原因分析，并提出了在狭窄水道进行大型拖航时应采取的安全措施。