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泳池是邮轮休闲娱乐设施的重要组成部分,泳池水的循环方式是影响水质均匀的重要因素。通过对顺流式、逆流式和混流式3种主流泳池水循环方式的优缺点进行收集分析,结合邮轮对泳池水循环方式的特殊要求进行综合评价与比选,推荐VISTA级大型邮轮采用逆流回水、顺流给水的泳池水循环方式,以提高泳池水循环效率。 相似文献
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为更好地满足大型邮轮安全返港的相关要求,基于《国际海上人命安全公约》(International Convention for Safety of Life at Sea,SOLAS)和MSC.1/Circ.1369通函,结合大型邮轮设计的实际情况,针对系统评估的关键问题,提出面向邮轮设计的安全返港相关理念。研究成果可为大型邮轮安全返港评估提供一定参考。 相似文献
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为探究地铁开通后对城市公共交通可达性以及居民出行的影响,文章以青岛市中心城区为例,从公共交通、居民出行、街道共享等角度分析地铁开通后带来的影响和变化。结果表明:地铁开通后对城市公共交通站点的服务范围影响较小,仅提高 3.2%,但是能够明显提高交通网络可达性,站点平均可达时间降幅达 16.22%,并且形成“圈层+廊道”的新模式;地铁开通后更加方便居民出行,居民点出行范围平均提高 12.57%,居民点可达时间平均降幅 12.83%;地铁开通能够减少不同街道在可达时间上的差异,各街道可达时间的公平性有所提高。相关研究可为群体出行分析及客流结构优化提供理论支撑。 相似文献
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Gearbox in offshore wind turbines is a component with the highest failure rates during operation. Analysis of gearbox repair policy that includes economic considerations is important for the effective operation of offshore wind farms. From their initial perfect working states, gearboxes degrade with time, which leads to decreased working efficiency. Thus, offshore wind turbine gearboxes can be considered to be multi-state systems with the various levels of productivity for different working states. To efficiently compute the time-dependent distribution of this multi-state system and analyze its reliability, application of the nonhomogeneous continuous-time Markov process(NHCTMP) is appropriate for this type of object. To determine the relationship between operation time and maintenance cost, many factors must be taken into account, including maintenance processes and vessel requirements. Finally, an optimal repair policy can be formulated based on this relationship. 相似文献
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