第三波“潮流”——东风悦达起亚赛拉图Cerato

在千里马之后．东风悦达起亚推出了中高级车型——远舰。这两款车之间需要一个中档的产品来补充．所以东风悦达起亚将于今年8月推出新车型赛拉图Cerato，为中国消费者提供更多选择。赛拉图的引进．进一步完善了东风悦达起亚产品矩阵，展示了起亚品牌将全球资源和国际潮流元素相结合的产品研发战略新成果。除企业实力获得加分外．也极大提升东风悦达起亚的品牌形象。     

Time-dependent Hyperstar algorithm for robust vehicle navigation

The vehicle navigation problem studied in Bell (2009) is revisited and a time-dependent reverse Hyperstar algorithm is presented. This minimises the expected time of arrival at the destination, and all intermediate nodes, where expectation is based on a pessimistic (or risk-averse) view of unknown link delays. This may also be regarded as a hyperpath version of the Chabini and Lan (2002) algorithm, which itself is a time-dependent A^* algorithm. Links are assigned undelayed travel times and maximum delays, both of which are potentially functions of the time of arrival at the respective link. Probabilities for link use are sought that minimise the driver’s maximum exposure to delay on the approach to each node, leading to the determination of a pessimistic expected time of arrival at the destination and all intermediate nodes. Since the context considered is vehicle navigation, the probability of link use measures link attractiveness, so a link with a zero probability of use is unattractive while a link with a probability of use equal to one will have no attractive alternatives. A solution algorithm is presented and proven to solve the problem provided the node potentials are feasible and a FIFO condition applies to undelayed link travel times. The paper concludes with a numerical example.     

车用软管

本文译自美国MOTOR杂志。现代的汽车上大量使用了不同类型的软管,从挡风玻璃清洗器管子到制动系统软管,从发动机进气管道到变速器冷却器、散热器和暖风加热器管,以及介于它们两者之间的连接管道基本上都采用了软管。并且,迟早这些软管中的一部分都需要进行更换。     

Enhanced bus operations: The Curitiba model and its applicability to China

Buses will remain the backbone of public transport systems for some time to come because of their lower cost and higher flexibility in relation to rail transport. However, buses are perceived as being an inferior mode of public transport and do not offer as much carrying capacity as rail transport. Following the Curitiba model, this paper looks at the potential for transferring some of the key advantages of rail transport to bus operations. This involves transforming bus stops into enclosed stations, with ticket purchase and/or checking in the station and at‐grade access to vehicles. It also involves the extensive use of bus lanes. The potential contribution of transport telematics is looked at, in particular the use of smartcards for payment in a closed fare system. The potential role of the Curitiba model for China is assessed in the context of toll road construction.     

Maritime piracy in the Indo-Pacific region – ship vulnerability issues

This paper describes the current situation with piracy and armed robbery at sea in the Indo-Pacific region, particularly off the Horn of Africa and in Southeast Asia. This situation may be aggravated due to the downturn in international shipping following the global financial crisis. This has led to surplus shipping capacity, crews paid off, lower profits, and ship owners seeking to cut costs. Many ships are laid up in anchorages prone to sea robbery, and there is a risk that ships might be less well maintained and operated. This paper also explains how some ships are more vulnerable to attack than others. Sub-standard ships are more likely to be successfully attacked than quality vessels. Issues are identified that might be addressed by the shipping industry and ship owners, as well as by the International Maritime Organization (IMO). In addition to being a victim of piracy, the shipping industry could be adding to the problem by laying up ships in vulnerable areas, reducing wages and sizes of crew and employing sub-standard ships. This situation could be symptomatic of wider problems in international shipping that throw doubt on the effectiveness of current regimes for ship safety, security and marine environmental protection.