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港口,是滨海城市的发祥地。港口推动城市发展,城市的发展又促进了港口的发展。纵观当今世界,港口已成为临港城市和所在区域经济发展的重要战略资源、综合运输枢纽、现代物流节点,成为推动城市群发展的重要辐射源和承载平台。城市和城市群的发展总是伴水而生、沿海而兴、依港而荣。从广州和广州港、珠海和高栏港、深圳和深圳港,到湛江和湛江港、汕头和汕头港,再到佛山和佛山港、中山和中山港、清远和清远港、惠州和惠州港、肇庆和肇庆港…… 相似文献
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港口,是滨海城市的发祥地。港口推动城市发展,城市的发展又促进了港口的发展。纵观当今世界,港口已成为临港城市和所在区域经济发展的重要战略资源、综合运输枢纽、现代物流节点,成为推动城市群发展的重要辐射源和承载平台。城市和城市群的发展总是伴水而生、沿海而兴、依港而荣。从广州和广州港、珠海和高栏港、深圳和深圳港,到湛江和湛江港、汕头和汕头港,再到佛山和佛山港、中山和中山港、清远和清远港、惠州和惠州港、肇庆和肇庆港……无论是对港口的 相似文献
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船体尾部流场速度场的横向和垂向分量是导致粘性阻力增加的根本原因,为了获得最小总阻力船型,以船体尾部区域为优化设计对象,以YZ方向的二次流能量最小为目标函数,以样条函数的参数为设计变量,在保证排水量为基本约束条件下,根据实际情况附加其它约束条件来控制尾部形状的变化,采用非线性规划法进行优化设计。通过集装箱船的优化算例,证实了采用该方法进行船型阻力优化的可靠性。 相似文献
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The topic of social inclusion is now maturing in the Thredbo conference series, being viewed as an important consideration in many aspects of land transport, the benefits extending beyond the socially excluded targeted population. The social inclusion workshop included presentations on new empirical evidence on the value of providing those at risk of social exclusion with mobility options, and how this links to improvements in personal wellbeing, often through mediating influences such as social capital. Work was presented on the role of transport services specifically targeted to those at risk of exclusion, particularly taxi services and school bus services, as well as how to modify fare structures to maximise inclusion in an efficient, mature transport system. The value of Universal Design principles to groups both at risk of being excluded as well as the current travelling public, was shown. The workshop affirmed the importance of including these wider benefits of inclusion in cost-benefit evaluations of transport. The issue of how best to move knowledge into strategic and operational policy, and the transferability of both knowledge and policy between different countries and settings, was discussed. This paper concludes with suggestions arising from the workshop in relation to policy and research, as well as recommendations for Thredbo 12. 相似文献
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延绳钓渔船的设计特点 总被引:3,自引:0,他引:3
本文就延绳钓渔船的优点与发展概况和分类情况与作业的特点作了介绍,并对垂线间长,长宽比,长深比以及渔舱容积与LBH的比值等主尺度进行了分析,还对其总布置特征,推进设备,发电机组的功率以及冷冻冷藏等主要阐述。 相似文献
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