基于MATLAB的公路运输量预测系统设计

交通流预测是智能交通系统的热门研究领域。本文基于MATLAB软件,运用指数平均法、弹性系数法、回归分析法、灰色预测法和组合预测法,对某市近年来客运量进行预测。结果表明,经过模型验证,运用上述五种方法构建的预测系统均可对客运量交通流进行良好预测。     

基于无线手持终端的图书物流信息系统研究与设计

针对我国图书物流配送效率低、准确性差的问题,以及图书出版业蓬勃发展的现状,分析了图书物流中心的作业流程,设计了以无线手持终端为现场信息处理设备的图书物流信息系统,分析了现有作业流程的缺点,阐明了基于无线手持终端的图书物流信息系统的优势.实际应用表明,将无线手持终端应用到图书物流配送中,作业效率、准确性都得到了较大提高.     

高模量沥青在道路交叉口路面车辙防治中的应用

道路交叉口附近路面由于长期处于车辆制动、起动及转向的特殊受力作用,使得该地段路面车辙频发.通过室内试验,对高模量沥青混合料在车辙防治中的路用性能进行研究,并结合工程实际,对其应用效果进行评估.研究结果表明,高模量沥青混合料应用于道路交叉口路面中将能有效地提高路面抗车辙性能.     

舰艇综合平台管理系统标准化硬件的应用

综合平台管理系统(IPMS)在舰船上的广泛应用是信息化发展的必然趋势.但是国内不同设备厂商之间硬件平台的差异,成为国内IPMS发展的瓶颈问题.介绍了舰艇综合平台管理系统标准化硬件的基本情况,对标准化硬件的应用问题进行了探讨和研究.     

多点系泊起重船数值分析与试验对比研究

以一艘工作水深46m的现役起重船为研究对象,采用基于全QTF法的时域准静态分析法对实际尺度起重船与系泊系统进行耦合数值分析,并与1:50的模型试验结果进行比较。结果表明:由于不考虑粘性阻尼影响,纵荡、纵摇的计算结果偏大,垂荡运动计算结果较为可信;垂荡、纵摇运动具有一阶低频成分,该响应对起重船的作业安全具有一定的威胁,应当给予重视;粘性阻尼、缆绳动力响应与水深对系泊起重船运动与缆绳张力的影响还有待研究。     

基于集对变权特大桥危险品运输安全评价研究

对特大桥危险品运输进行安全评价可有效防止和减少事故的发生.以集对论和变权理论为基础,对长三角区域特大型桥梁进行不良气候条件和紧急事件影响下的危险品运输安全分析,提出影响运输安全的关键因素,运用集对论对各因素进行同一性、差异性和对立性分析,并将集对论与指标权重的惩罚-激励相结合,建立特大桥危险品运输集对变权评价模型,以关联度最大为准则来判定运输安全程度.实例计算表明:评价方法实际有效,可为桥梁运营方提供直接应用和参考.     

A risk appraisal system regarding the implementation of maritime regulations by a ship operator

The shipping industry operates in a regulatory framework, where the International Maritime Organization (IMO) is the leading regulatory body. The role of the IMO is to propose maritime regulations to its member states. The successful worldwide implementation of a maritime regulation depends on how many member states adopt it. However, many maritime regulations are not adequately implemented worldwide. As a result, ship operators have found themselves in an uncomfortable position in developing their business in an unstable regulatory regime. This paper proposes an extendable and applicable methodology involving a System of Hierarchical Scorecards (SHS) to measure the implementation costs and benefits of a newly introduced or existing maritime regulation by ship operators. The regulators may use the results in evaluating newly introduced and/or existing regulations through taking into account the economic burden that will be generated to ship operators. In this paper, SHS is extended to demonstrate its applicability on evaluating a ship operator’s organization with regard to his regulatory implementation performance by the means of a case study.     

Introduction to the special issue on maritime security

The terrorist attacks of 11 September 2001 heightened awareness about the vulnerability of all modes of transportation to terrorist attack. The issue of maritime security has therefore become a major concern in the international maritime sector over the past several years. Globalization has led to a strong growth in seaborne trade; however, it simultaneously increases vulnerability to not only terrorism but also international criminal activities that threaten the world's supply chain. For example, in 2008, the rise in piracy activities in the Gulf of Aden brought the issue of maritime security to the forefront of international debate. In addition to the direct impact on ships, crews and cargoes, and on the maritime industry and governments, piracy also threatens global seaborne trade, and has an impact on energy security and the environment [UNCTAD, 2009, Review of Maritime Transport 2009 (New York: United Nations)]. Maritime piracy can pose substantial risks to seaborne trades, with considerable commodities, ranging between raw materials and energy to high-value manufactured products, being shipped between global economic powerhouses [FU, X. W., NG, A. K. Y., LAU, Y. Y., forthcoming, The impacts of maritime piracy on global economic development: The case of Somalia. Maritime Policy and Management]. Maritime security management, including the definition of security, maritime risk assessment, security measures, the regulation and policy of maritime security in shipping and port-related business operations has been receiving growing attention, both in practice and research.     

U.S. Fishery Management Councils as Ecosystem-Based Management Policy Takers and Policymakers

The United States has a new national ocean policy that adopts ecosystem-based management (EBM) as its first principle for managing U.S. ocean spaces and marine resources. However, U.S. laws that govern the uses of ocean spaces present a challenging tangle of authorities and mandates that do not easily facilitate ecosystem-based policies. For over 30 years, U.S. marine fisheries management has been guided by eight Regional Fishery Management Councils. Working under the many laws that guide setting stewardship priorities for ocean ecosystems, councils provide the Federal Government with advice on fisheries harvest levels, fish habitat protections, and fishing community needs. Implementing EBM for any ocean ecosystem requires a careful examination of the laws and policy processes that affect human interaction with that ecosystem. This article explores the U.S. perspective on federal ecosystem-based fisheries management, its part in U.S. national ocean policy, and how fishery management councils might position themselves as both EBM policymakers and policy takers for ocean resource management.     

Use of GIS-Based Models for Integrating and Developing Marine Fish Cages within the Tourism Industry in Tenerife (Canary Islands)

Site selection is a key factor in any aquaculture operation, affecting both success and sustainability. Moreover, it can solve conflicts between different coastal activities, making a rational use of the coastal space. Geographical information systems (GIS) have become of increased significance for environmental planning and assessment mainly because of the need to compare a great number of spatially related data, and because it can be used to couple these spatial data with their attributes and overlay them. This study used GIS and related technology to build a spatial database using those criteria which were considered to have any influence in integrating marine fish-cage culture within the tourism industry in Tenerife. Criteria were grouped in three submodels (distance to beaches, nautical sports, and viewshed), which were combined to generate a final output showing the most suitable areas for cage culture development in coexistence with tourism. Most areas of the coastline of Tenerife were identified as being suitable (56%) or very suitable (46%), suggesting that marine cage aquaculture could be developed on the island in coexistence with the well-established tourism industry.