中远集运能效管理信息系统与碳排放计算器

文中介绍了中远集运能效管理信息系统与碳排放计算器的开发背景、系统架构、系统使用开发技术、EEOI计算依据与碳排放计算器的功能与应用。     

OPC技术在舰船综合平台管理系统中的应用研究

针对目前舰船存在多种异构数据源但尚无统一数据通信机制和标准的现状,对OPC技术在舰船综合平台管理系统(IPMS)中的应用展开分析和研究,以实现各分系统设备之间灵活便捷的信息共享。介绍OPC技术的基本原理、发展现状和IPMS基本框架,通过分析对比传统OPC通信方案和KepWare OPC通信方案,提出IPMS中的KepWare OPC方案,很好地实现各信息单元之间的数据通信。     

新公共管理视角下 我国海事立法工作的思考

文中在新公共管理视角下,针对我国海事立法现状,从立法理念、立法机制和信息化保障等方面进行分析,并以"提高制度建设质量"为出发点,借鉴国际海事组织提出的GBS相关理念,对如何提高海事立法工作质量提出建议。     

浅谈新时期企业档案管理工作对企业发展的影响

档案管理是企业管理的重要组成部分,也是企业管理的一项基础性工作。新时期企业档案管理工作直接关系着企业的发展,对企业发展有着重要的影响,所以新时期新的形势对档案工作提出了新的要求。新时期必须要加强档案管理工作,一是进一步提高档案工作者的专业知识,参与生产技术管理;二是档案管理工作要积极主动地为企业当好参谋;三是运用现代化的管理手段,使档案工作向科学化、现代化迈进。     

On the fundamental diagram and supply curves for congested urban networks

Macroscopic fundamental diagrams (MFD) of traffic for some networks have been shown to have similar shape to those for single links. They have erroneously been used to help estimate the level of travel in congested networks. We argue that supply curves, which track vehicles in their passage through congested networks, are needed for this purpose, and that they differ from the performance curves generated from MFD. We use a microsimulation model, DRACULA and two networks, one synthesizing the network for Cambridge, England, and one of the city of York, England, to explore the nature of performance curves and supply curves under differing patterns of demand.We show that supply curves differ from performance curves once the onset of congestion is reached, and that the incorrect use of performance curves to estimate demand can thus seriously underestimate traffic levels, the costs of congestion, and the value of congestion relief measures. We also show that network aggregated supply curves are sensitive to the temporal distribution of demand and, potentially, to the spatial distribution of demand. The shape of the supply curve also differs between origin–destination movements within a given network.We argue that supply curves for higher levels of demand cannot be observed in normal traffic conditions, and specify ways in which they can be determined from microsimulation and, potentially, by extrapolating observed data. We discuss the implications of these findings for conventional modelling of network management policies, and for these policies themselves.     

A network option portfolio management framework for adaptive transportation planning

A real option portfolio management framework is proposed to make use of an adaptive network design problem developed using stochastic dynamic programming methodologies. The framework is extended from Smit’s and Trigeorgis’ option portfolio framework to incorporate network synergies. The adaptive planning framework is defined and tested on a case study with time series origin-destination demand data. Historically, OD time series data is costly to obtain, and there has not been much need for it because most transportation models use a single time-invariant estimate based on deterministic forecasting of demand. Despite the high cost and institutional barriers of obtaining abundant OD time series data, we illustrate how having higher fidelity data along with an adaptive planning framework can result in a number of improved management strategies. An insertion heuristic is adopted to run the lower bound adaptive network design problem for a coarse Iran network with 834 nodes, 1121 links, and 10 years of time series data for 71,795 OD pairs.     

地铁建设工程的风险管理应用研究

地铁建设工程作为一项大型工程项目,往往存在着大量的不确定风险因素,因而风险管理在地铁工程中变得越来越重要.文章通过对国内外地铁工程事故经验的探讨,提出了地铁建设工程中风险管理的框架,包括风险辨识、分析和评估、应对以及风险防范措施等,以预防和减轻地铁工程风险,达到降低风险等级的目的.     

加强机械化施工管理 提高沥青路面平整度

沥青砼路面的平整度是决定行车安全性、舒适性的主要因素,结合施工实践,对机械化施工管理中与平整度密切相关的因素进行阐述,可供同行借鉴和参考。     

加强机械安全管理 确保施工顺利进行

着重分析公路工程施工机械设备安全管理方面的几个难题,并提出防治措施,对相关工程具有一定的借鉴意义。     

小城镇道路交通安全管理规划研究

通过分析我国小城城镇特点及其交通安全面临的问题,并结合交通安全规划的理论,提出小城镇道路交通安全规划的具体原则和内容,具有一定的理论和实际意义。