某跨海引水工程设计

结合长海县跨海引水工程,介绍了海底取水管线在设计过程中的主要方法和内容。工程设计中针对不同的地质、水文状况采取相对不同断面构造形式,并根据工程经验加以分析,得到了成功应用。     

城市轨道交通供电系统自动地线装置的研制

明确了城市轨道交通供电系统自动地线装置的研制对保障作业人员的人身安全的重要性,分析了人工挂设地线方式的各种安全隐患,介绍了自动地线装置的主要构成和技术特点,阐述了该装置对作业人身安全保障、供电安全保障等方面的作用,总结了其运营经济价值。     

Noncontact power supply for seafloor geodetic observing robot system

A new and effective seafloor geodetic observing robot network system, which consists of several submarine stations situated in regions susceptible to interplate earthquakes, has been proposed and is under construction in Japan. Each station, equipped with an autonomous underwater vehicle (AUV) dock, is connected to a land facility by cables providing power and communication. Near the AUV dock, three or four seafloor reference stations will be set up for geodetic observations. In this system, a noncontact power supply is required for a battery-driven AUV to conduct observations for extended durations. A small, intelligent, efficient, high-power noncontact feed system of 400 W capacity with an inverting efficiency of 77% in salt water has been developed. It has been shown to be effective in a water tank experiment in which the noncontact power supply automatically fed power to an AUV for 3 days.     

供应链环境下库存管理方法的研究

本文论述了供应商管理库存、联合库存管理相对于传统库存管理的先进思想、先进管理技术及在企业中的运用。提出了如何降低库存管理的方法。     

基于供应链管理的造船企业流程再造决策与分析

研究供应链管理环境下的造船企业业务流程再造的决策与流程分析,旨在强化造船企业供应链管理,降低船舶建造成本、缩短周期、提高质量。针对船舶建造的复杂性,涉及业务的多样性,提出造船企业的业务流程再造两步走策略:第一步进行业务外包决策分析;第二步对供应链管理的六个环节实施业务流程再设计。围绕造船企业供应链管理的订单、物流、分销、制造、采购、计划六个环节进行业务流程再设计,对造船企业相关部门在六个环节中的衔接和职责进行了剖析。     

液化天然气船推进装置分析及探讨

目前世界上多家发动机公司推出各种液化天然气船(LNG)的新型推进动力装置.作者通过蒸汽轮机动力装置在LNG船上的应用及选型分析,对未来新一代LNG船推进装置的发展趋势进行展望.     

Improving the physics of a coupled physical–biogeochemical model of the North Atlantic through data assimilation: Impact on the ecosystem

Several studies on coupled physical–biogeochemical models have shown that major deficiencies in the biogeochemical fields arise from the deficiencies in the physical flow fields. This paper examines the improvement of the physics through data assimilation, and the subsequent impact on the ecosystem response in a coupled model of the North Atlantic. Sea surface temperature and sea surface height data are assimilated with a sequential method based on the SEEK filter adapted to the coupling needs. The model domain covers the Atlantic from 20°S to 70°N at eddy-permitting resolution. The biogeochemical model is a NPZD-DOM model based on the P3ZD formulation. The results of an annual assimilated simulation are compared with an annual free simulation.With assimilation, the representation of the mixed layer depth is significantly improved in mid latitudes, even though the mixed layer depth is generally overestimated compared to the observations. The representation of the mean and variance of the currents is also significantly improved.The nutrient input in the euphotic zone is used to assess the data assimilation impact on the ecosystem. Data assimilation results in a 50% reduction of the input due to vertical mixing in mid-latitudes, and in a four- to six-fold increase of the advective fluxes in mid-latitudes and subtropics. Averaged zonally, the net impact is a threefold increase for the subtropical gyre, and a moderate (20–30%) decrease at mid and high latitudes.Surface chlorophyll concentration increases along the subtropical gyre borders, but little changes are detected at mid and high latitudes. An increase of the primary production appears along the Gulf Stream path, but it represents only 12% on average for mid and high latitudes. In the subtropical gyre centre, primary production is augmented but stays underestimated (20% of observations). These experiments show the benefits of physical data assimilation in coupled physical–biogeochemical applications.     

可靠性理论在城市轨道交通供电系统中压环网分区设计中的应用

定性分析已难以满足城市轨道交通中压环网分区方案精细化设计要求,必须以定量分析作为评价或研究的基础。根据可靠性理论,采用马尔可夫状态空间法、最小路集法建立了城市轨道交通中压环网分区模型,结合具体工程对中压环网分区方案与车站变电所可靠性进行了定量分析。建议在前期设计时,应采用可靠性理论对年平均停运时间进行评估,以确定兼顾经济性和可靠性的中压环网分区方案。     

舰船恒压消防供水技术

根据《舰船通用规范》及《舰船消防要求》的具体规定，针对我国海军现有舰船“水灭火系统”动力水源的配置现状，分析了目前舰船“水灭火系统”和各个“海水系统”供水原理的共性及不足，提出了用一种集成化、标准化和模块化式的“海水工作站”技术全面综合地替代舰船“水灭火系统”乃至各个“海水系统”的动力水源的设计思路，用于缩短各系统对终端用户的响应时间、提高各系统快速反应能力，提高各系统的工作可靠性乃至整个舰船的生命力。重点分析了采用舰船恒压消防供水技术的可行性，同时归纳了舰船恒压消防供水技术的特点及应用意义，叙述了舰船恒压消防供水技术的工作原理，并对舰船恒压消防供水装置的基本组成及工作可靠性进行了全面分析。     

垂直电梯火灾时延时切非方式讨论

介绍城市轨道交通垂直电梯火灾时的控制模式;分析垂直电梯从2级负荷配电箱走线、从1级负荷配电箱走线、从400 V开关柜单独走线的3种供电回路,以及不同供电回路对应的延时切非控制方案及其优缺点,并给出推荐方案。指出了电梯蓄电池作为备用电源的注意事项。