达喀尔，我来了 威麟年队征战达喀尔拉力赛侧记

“我可带你一起去敲击冒险之门,但打开这扇命运挑战之门的是你自己。”——泽利·萨宾。作为达喀尔拉力赛的创始人,泽利·萨宾毫不讳言这项赛事的艰难。2010年,对于中国达喀尔迷来说更值得期待,因为第一次。中国车来了……     

钢铁企业寻求开辟新的补给线

中国主要钢铁公司表示,鉴于目前市场重拾信心,将着手建立新的补给渠道。但行业分析人士却认为,在钢铁价格渐趋平稳、银行拒绝提供资金的环境下,现在想更新或扩张船队绝非易事。     

CFD validation studies for a high-speed foil-assisted semi-planing catamaran

This paper details the CFD validation studies carried out as a prerequisite for multi-fidelity CFD-based design optimization of high-speed passenger-only ferries aimed at reducing far-field wake energy that causes beach erosion. A potential flow program (WARP) and a URANS program (CFDSHIP) were validated using full-scale measurements of resistance, sinkage, trim, and far-field wake train obtained over a wide range of speeds for two high-speed semi-planing foil-assisted catamarans: Spirit (LOA-22 m) and 1060 (LOA-17 m). This study posed a unique combination of challenges for CFD modeling: the foil appended geometry required complicated surface overset grids, the effect of the waterjet and wind resistance had to be modeled, and a method had to be devised to extrapolate the calculated near-field elevation to get the far-field wake train using Havelock sources. A more concentrated effort was applied to the URANS verification and validation which forms the focus of this paper. The results show that URANS is able to accurately predict the resistance and motions for both vessels when coupled with models that account for the propulsors and air resistance. The overall accuracy of URANS for the performance analysis of the foil-assisted, semi-planing catamarans was adequate to warrant its use as a tool for subsequent design and optimization of a new vessel with significantly reduced wakes.     

A multiple transfer function model for air traffic control systems

This paper considers the problem of modeling dynamic fluctuations in aircraft concentration within a group of air traffic control sectors. Using simultaneous time series recorded for each of the sectors, a multiple transfer function noise model is constructed. The modeling procedure demonstrates a data-dependent approach to ATC systems analysis which does not rely on describing the movement of individual aircraft.     

清洁能源的力量

在成都清洁能源汽车展上,我们有幸见到了标致雪铁龙集团中国技术中心总经理阿博德先生。他和我们推心置腹地谈到了未来十年中标致雪铁龙集团在清洁能源方面的战略。     

G一代新兵

英菲尼迪G系车型一向以完美的设计、出色的性能和丰富的配置而博得众多消费者的青睐。紧随着G系轿车和G37双门跑车的步伐,全新G37硬顶敞篷跑车如今也被引入中国豪华车市场,它进一步诠释了英菲尼迪的灵感美学与工程技术,带给人们无可抵御的视觉和性能诱惑。灵动的车身加上随心而涌的强劲动力,G37硬顶敝篷跑车可在畅然无限的提速中使驾驶者体验到人与自然合二为一的顶级驾驭乐趣。     

How much disruption to activities could fuel shortages cause? – The British fuel crisis of September 2000

In September of 2000 the UK experienced a blockade of oil refineries in response to rising fuel prices. These protests resulted in severe fuel supply disruptions that intensified over the course of about one week. During the peak of the crisis, travel activity by car was curtailed. This paper analyzes survey data collected about two months after the crisis utilizing the recent memory of respondents as to how they would expect this sort of disruption to affect their participation in daily activities. Specifically, we focused on a variety of non-discretionary and discretionary activities and examined what factors are associated with respondents expecting disruption to those activities. Statistical models were developed to analyze how demographic factors, commute mode selection, vehicle characteristics, and various other factors can explain how individuals expect disruption to their activities. Results suggest that the majority of individuals do not expect major disruptions, although for more car-dependent individuals, disruption was expected to be substantial, especially for work-related trips. These results have implications for the potential success and benefits of an integrated transport policy.     

车世界的文身艺术

David Gwyther是一位伦敦的平面设计师,他拥有自己的工作室——Death Spray Customs,专门从事自行车整车及零配件的设计和创作。与众不同的是,这五年来他一直采用一种非传统式自行车美学观念,所完成的设计非常有趣,而不是一板一眼的传统设计。在伦敦,自行车仍被视为一种时尚配饰,这与中国的情形显然大不相同;尽管如此,David Gwyther的工作室仍是伦敦唯一一     

Commercialising the management and maintenance of trunk roads in the United Kingdom

Public funding of new infrastructure from money raised through taxes or borrowing has been questioned globally in recent years. One alternative solution has been to finance major capital projects through Build, Operate & Transfer (BOT) schemes. In the United Kingdom, the Private Finance Initiative (PFI) has become established as the procurement method of choice for many projects and services in central and local government. It is a natural development of other changes in government administration which have been introduced over the past few years. Projects delivered in this way enable government to become a buyer of services on behalf of the public rather than a direct provider of those services to the public, taking advantage of private sector management skills and resources in their delivery. The PFI has demonstrated its ability to deliver value for money solutions in projects across a range of capital-intensive public services, but the greatest success in delivering projects has been in the transport sector. This paper outlines how the British Government's Highways Agency has restructured and commercialised the management and maintenance of the strategic road network for which it is responsible, and how it has been at the forefront of developing successful privately financed projects. The paper explains the Agency's particular version of BOT – Design, Build, Finance and Operate (DBFO) projects. These projects are delivering new and improved road construction and maintenance, providing better services to users of the country's strategic road network and achieving significant value for money savings for taxpayers.