船舶航行数据远程采集系统

介绍了一种基于卫星通信的船舶数据远程采集系统,该系统采用嵌入式控制设计,组合船舶C站和自动识别系统(AIS)设备组建系统,利用C站的卫星通信功能接收陆地远程控制指令,通过嵌入式控制系统实现对C站和AIS设备的远程控制。采集C站和AIS设备中的船舶航行信息,通过卫星通信将航行信息传送到陆地船舶管理系统,实现了船舶数据的远程采集,为提高船舶自动化和现代化管理水平提供了技术平台。     

基于B/S铁路财务数据审计预警系统设计与实现

介绍基于B/S方式的铁路财务数据审计预警系统的设计和实现过程,就设计思路、系统目标和功能模块进行阐述,并对关键技术的设计作了具体论述.     

车辆安全检测和管理系统的设计与实现

分析海量数据传输和管理系统的功能,并针对系统特点提出了基于C/S和B/S混合结构的解决方案,最后介绍了系统的设计与实现.     

浅谈数据库数据备份及数据高可用性

数据库保存了行调指挥中心的所有基础数据、实时数据等内容,如何保持其安全性、稳定性、持续性是一个重要问题.为此,对数据库数据备份及数据高可用性提出解决方案.     

计算机口令设置的要求与技巧

我们已进入信息化社会,很多人都需要利用计算机处理每天的学习和工作,当我们在网上使用一些如邮箱、聊天、网上银行等功能时,需要设置口令来保护自己的信息,本文介绍了黑客攻击用户帐户的常用方法,用户设置口令的要求与技巧。     

Measuring supply chain efficiency based on a hybrid approach

Supply chain management has a tremendous impact on the success of a company. One of the critical issues for gaining competitive advantages for companies is improving supply chain performance. Most studies about the application of Data Envelopment Analysis (DEA) Supply chain models do not identify the benchmarking units for inefficient supply chains. On the other, measuring the short run and long run of the supply chain efficiency is another challenge for decision makers in supply chain management. Hence, we propose a methodology of DEA for measuring of the supply chain. We integrated two approaches as special cases of the hybrid model and compare the short and long run strategies of supply chain and can be identified benchmarking.     

Cost-efficiency benchmarking of European air navigation service providers

This study uses EUROCONTROL data on operating performance of the national air navigation service providers over the 2002–2011 time period to document in detail the efficiency changes across providers and time using data envelopment analysis. Our results suggest that overall providers’ productivity improved over the time period covered by the data, driven by improvements in technical rather than allocative efficiency. However, some trend reversals in the post-2008 crisis period are also observed.     

上海市道路货运结构的经济适应性评价

分析上海市道路货运结构与国民经济的适应性。采用DEA数据包络分析方法,通过选取国民经济指标及道路货运结构指标,评价上海市道路投入及经济产出的有效性,进而说明上海市现状的道路货运结构与国民经济的适应性。最后,通过模型结果分析上海市道路货运结构中存在的问题,并为道路货运结构的调整提供合理性建议。     

The influence of the road network on private productivity measures using Data Envelopment Analysis: A case study from Spain

We evaluate the economic effects of investment in the road network on private regional activity. We employ provincial Spanish panel data from 1980 to 2007 to perform non-parametric frontier techniques based on Data Envelopment Analysis and to obtain the Malmquist productivity indexes, thus enabling us to examine the evaluation of the productivity growth via technological changes or efficiency gains. Additionally, we analyze the role of transport infrastructure on the evolution of Total Factor Productivity and its components through econometric techniques. Our results show important spillover effects. Moreover, our findings have significant implications for policy makers if we take into account the fact that the use of the road network in economic activity or in commercial relations greatly influences productivity growth.     

PSC数据中船龄与缺陷相关性的可视化挖掘

基于台湾某四港近8年来PSC工作的电子数据记录,对船舶缺陷与船龄进行关联分析,提取其间相关特征,提出一套行之有效的可视化数据挖掘方法,为提高港口国检查工作效率提供了一个科学、高效的定量方法。