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徐润东 《船舶标准化工程师》2009,(1):24-26
文章介绍了某型号水雷在性能功能测试、环境试验、环境应力筛选和可靠性研制试验等研制过程中实施可靠性增长、运用FRACAS系统,达到产品可靠性指标的目的,有效解决型号研制经费紧张、研制周期短、可靠性试验实施难度大的问题. 相似文献
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基于结果链的舰船研制过程建模研究 总被引:1,自引:0,他引:1
根据现有系统分析和过程建模的局限性,在舰船研制过程建模中采用了结果链技术(RCM),用形式化描述的方法对舰船研制的横向和纵向阶段进行了过程抽取.舰船研制系统过程的结果链建模使模型易于理解、分析和综合考虑,同时支持任务的分解和资源的分配,舰船研制项目模型和结果链模型的集成将有助于明确舰船产品模型和过程模型的关系,有助于舰船研制过程的管理和控制. 相似文献
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船舶电子装备的发展水平是船舶工业竞争力的重要衡量标准,由于船舶电子装备研制过程繁琐、探索性极强且成本高,导致研制过程中的风险防控难度非常高,为减少损失,对船舶电子装备项目研制中的质量风险进行建模与评价是必不可少的。本文针对这些问题,首先对船舶电子装备项目研制过程中的风险进行了研究,其次给出了船舶电子装备研制项目质量风险建模方法,然后根据风险控制目标要素的特点抽取决策变量建模,并根据模型选择合适的风险评价方法进行评价。最后以某所的综合船桥系统的研制为例,对上述所提出的方法进行验证,结果表明,在该系统研制过程中该方法风险识别的覆盖率为100%,风险评价的拟合度均超过80%。 相似文献
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针对我国舰炮装备研制周期紧的现状,提出了基于并行工程的舰炮研制新思路。介绍了并行工程的概念、技术基础和国内外应用概况,分析了我国舰炮研制开展并行工程的可行性,提出了在舰炮研制中实施并行工程的方法。 相似文献
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分析了型号各阶段标准化工作的要求,提出了军方和研制部门在型号各阶段的任务,使军方和研制部门各司其职,密切配合,以便更好的发挥标准化在型号各阶段的指导作用,提高装备研制的质量. 相似文献
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Hendra Yusran Siry 《Coastal management》2013,41(3):267-285
Transferring decision-making process from central to local government and enhancing the role of local communities in managing coastal zones is an increasing commitment by governments in Southeast Asia. This article analyzes decentralized coastal zone management in two neighboring countries, Malaysia and Indonesia. The Federal system in Malaysia is argued to be able to influence more decentralized coastal zone management and to promote community-based management approaches. Meanwhile, the large diversity of coastal resources and communities combined with a still as yet tested decentralization policy in Indonesia is argued to bring more challenges in implementing the decentralization and community-based approaches in coastal zones. The lessons learned in this study provide insight in how far decentralized coastal zone management has taken place in Malaysia and Indonesia. The significant differences in the pattern of coastal zone management in these two countries are discussed in detail. This study recognizes that co-management and community-based approaches can be appropriate in dealing with coastal zone management. This comparative perspective is important to the development of a bigger picture of sustainable coastal zone management processes and cross-regional knowledge-sharing in Southeast Asia. 相似文献
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This primary objective of this paper is to examine the causes for the change in energy consumption in the transport sector in India. The pattern of energy consumption and their causes for change are benchmarked against select countries. A mathematical model that decomposes changes in energy consumption to various factors has been used. The changes in the energy consumption are attributed to growth in transport volume, structural change or modal shift, and energy intensity. The analysis is conducted for passenger and freight transport separately. Results indicate that the growth in transport volume has been the main cause for increase in energy consumption for both passenger and freight transport in India despite the decline in energy intensity of various transport modes. Though not surprising for a growing economy like India, this poses a challenge for the future. Currently, India is a low carbon economy. 相似文献
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This paper provides an up-to-date review of the previous literature concerning the impact of passenger rail franchising on productivity and costs in Britain, and also presents important new evidence. In particular, the extension in time of previously-used datasets offers the first opportunity to study the impacts of re-franchising. The previous literature emphasised the failure of franchising to produce sustained productivity gains, with a sharp deterioration in productivity after 2000. The new evidence presented offers a somewhat more positive view of the British experience. It suggests that part of what was previously considered to be falling productivity may in fact be due to exogenous changes in diesel prices. Further, new data suggests that the recent increases in costs have resulted in higher quality of service. Finally, competitive re-franchising, and the associated unwinding of short-term management and re-negotiated contracts, seems to have led to improvements in productivity between 2006 and 2008. Nevertheless, it remains the case that passenger rail franchising in Britain has failed to reduce costs in the way experienced in many other industries and in rail in other European countries. The evidence is that somewhat larger franchises, avoiding overlapping and optimising train density and length, should reduce costs. We also speculate that the major increase in wages and conditions of staff might be moderated by longer franchises, although that remains to be proved. This re-appraisal of the British case is important in the context of the wider international interest in the use of franchising in passenger rail, and its relevance to the current review of ways of introducing competition into the domestic rail passenger market in Europe. 相似文献
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东亚港口集装箱运输发展前景 总被引:1,自引:0,他引:1
东亚地区正在建设或规划建设大量的集装箱码头,这是否适应本地区未来港口集装箱运输发展形势值得关注.介绍英国海运咨询有限公司的相关研究成果. 相似文献
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随着海上运输方式的不断发展,集装箱运输以其安全、高效、便利、快捷的优点,赢得市场青睐。近年来,海运危险货物不断呈现出集装化和散装化趋势,集装箱运输的危险货物量越来越多,事故发生率在逐年增加。文中以现有的法律、法规和规范为依据,结合实际工作经验,阐述了危险货物集装箱水上运输的安全监管对策。 相似文献
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Vertical bending moment (VBM) is of crucial importance in ensuring the survival of vessels in rough seas. With regard to conventional vessels, wave-induced maximum VBM is normally considered to be experienced in head seas. It is conservative to determine the extreme VBM based on either numerical simulations or model tests in long-crested head seas. Extensive model tests have been conducted in head seas with focus on the nonlinear vertical responses in severe seas, and the measured results were compared with numerical calculations for validation. Unexpected phenomena, however, were observed during the model tests of an ultra-large containership. The maximum sagging and hogging VBMs were encountered in oblique seas. Furthermore, the significant wave height used in oblique seas was even smaller than that used in head seas. The nonlinear vertical load effects in oblique seas require further investigations for this particular vessel. Limited experimental results in oblique seas have been reported, in which the lateral responses were always more concerned than the vertical responses. Up to now, rare systematic comparisons of the nonlinear vertical responses between head and oblique seas have been published, especially when the hydroelastic effects are also accounted for. A 13000-TEU ultra-large containership model, which was designed by Hyundai Heavy Industries (HHI), has been tested in the towing tank and the ocean basin at the Marintek center in Trondheim. The experimental results in regular waves are first compared between head and oblique seas. The statistical characteristics of the VBM amidships under nineteen irregular wave conditions are then investigated. Next, the extreme hogging and sagging VBMs are compared under different wave conditions with focus on the extreme hogging VBMs. At the end of the paper, the uncertainties in the experiments are discussed. 相似文献
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由于后张预应力空心板的体积较小、预制安装简单方便,有利于规模化生产、运输和安装,已广泛应用于我国公路桥梁工程的上部结构中.结合福建地区港口工程中以后张预应力空心板作为上部结构的实例,介绍后张预应力空心板的设计、预制和安装的要点,并针对施工期空心板加载试验数据进行分析,总结在港口工程中采用后张预应力空心板的经验,供类似工... 相似文献