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地矿部海洋地质研究所主持的“东太平洋海盆多金属结核矿物地球化学研究”的八个专题通过评审和验收1996年2月2日至4日,地矿部石油地质海洋地质局在青岛组织以秦蕴珊院士为主任委员的专家组对地矿部海洋地质研究所、矿床研究所、水文地质工程地质研究所、上海海洋... 相似文献
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应用模式输出统计的逐步判别方法,对山东南部沿海4~7月海雾出现作24h的判别预报。候选预报因子包括:日本数值预报传真图、近岸台站的观测、经验设计因子及其一些组合因子。对1993年4~7月独立资料,进行试报检验,结果表明,预报准确率达77% 相似文献
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六横大岙附近海域环境质量现状评价 总被引:1,自引:0,他引:1
根据1995年4月对码头工程区附近海域的水质和沉积物的环境质量现场调查,采用环境质量指数法,评价了该海区水质和沉积物的环境质量状况。结果表明,水质中无机氮严重超标,超三类标准的超标率达100%。无机磷超一类标准的超标率达100%,有个别测站超二类标准。COD、pH、DO、油类均低于一类海水标准。潮间带水质基本符合一类水质要求。底质环境质量现状良好 相似文献
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本文介绍了供测定水和海水中活性磷酸盐含量的标准物质的研究程序。其中包括了标准物质的配制、均匀性和稳定性检验、分析方法和数据统计处理等。并采用离子色谱法和分光光度法进行定值,对制备浓度分别为0.40、0.80、1.60、3.20、4.80μmol/dm3的磷酸盐标准物质,其相对不稳定度分别为3%、2%、1%、1%、1%。稳定期为一年以上。 相似文献
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《海洋地质与第四纪地质》2010,(4)
<正>"中国知网"科技期刊采编平台由清华大学中国学术期刊(光盘版)电子杂志社设计制作,具有学术文献快速发表、稿件质量辅助评审、建立规范化、国际化的投稿采编系统的功能。可以通过在线采编系统,缩短审 相似文献
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截止2002年1月,建设部、国家计委相继颁布了《工程设计资质分级标准》(其中含海洋行业工程设计),《海洋工程勘察资质分级标准》,《工程勘察设计收费标准》(其中含海洋工程勘察、设计收费标准);建设部、人事部领导下的全国注册工程师管理委员会也批准了启动注册海洋工程师筹备工作。这些工作的完成对促进我国海洋工程事业发展,规范海洋工程勘察设计市场行为,提高海洋工程勘察设计队伍素质和质量水平,为我国海洋工程勘察设计技术人员走向国际市场奠定了坚实的基础。同时也标志着我国海洋工程勘察设计管理体系已确立,海洋工程… 相似文献
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由胜利石油管理局、国家海洋局第一海洋研究所、天津大学、上海交通大学共同承担的国家“863”高科技攻关项目“可移动桶形基础采油系统技术研究”,在室内外大量试验的基础上,经过4单位有关领导和科技人员的不懈努力,取得了突破性进展——我国首座桶形基础采油平台于1999年10月25日在胜利油田埕北CB20B井组顺利安装成功。该平台设计工作水深8.9m,基础部分由4个高4.4m,直径4m的桶组成。桶形基础平台与普通的桩基平台不同之处就是利用桶基础代替了桩基础,施工方式也由原来的打桩安装方式改变为利用负压抽吸… 相似文献
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2011年6月25日,由上海海洋石油局工程技术处组织专家对第一海洋地质调查大队负责实施的“海洋二维地震深层(中生界)勘探采集技术先导试验”项目进行了初步评审。专家组认真审阅了试验报告,听取了项目承担单位的汇报,经过质疑、答辩和讨论,一致同意该项目通过本次评审。 相似文献
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本文介绍了强风计测风螺旋浆材料的选择、螺旋浆外形的数学模型的建立过程,在计算机中生成螺旋浆三维模型的方法,螺旋浆模具的加工手段,以及风洞试验对螺旋浆设计的验证。 相似文献
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The evaluation of ·risk’ is based on long-term cumulative distributions of such design parameters which influence the seaworthiness of offshore structures. It is shown how risk distribution functions can be derived from cumulative distribution functions and how safe design values are defined with regard to specified risk levels. The examples given include two most modern designs which have already obtained a quality assurance at Germanischer Lloyd: a semi-submersible LNG-liquefaction platform with a built-in concrete LNG-tank and a semi-submersible drilling platform. Special attention is given to the question of reasonable platform clearance above still water level as specified by the Classification Societies, as well as to the definition of safe design values of loads which occur independently but have to be combined in a structural analysis. Finally, safety factors are critically examined in light of risk analysis and a basic design principle is suggested. 相似文献
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Mary Gleason Scott McCreary Melissa Miller-Henson John Ugoretz Evan Fox Matt Merrifield Will McClintock Paulo Serpa Kathryn Hoffman 《Ocean & Coastal Management》2010,53(2):52-68
The planning process for California's Marine Life Protection Act in north central California represents a case study in the design of a regional component of a statewide network of marine protected areas (MPAs) for improved ecosystem protection. We describe enabling factors, such as a legislative mandate, political will, and adequate capacity and funding that fostered a successful planning process. We identify strategic principles that guided the design of a transparent public planning process that delivered regional MPA network proposals, which both met science guidelines and achieved a high level of support among stakeholders. We also describe key decision support elements (spatial data, planning tools, and scientific evaluation) that were essential for designing, evaluating, and refining alternative MPA network proposals and for informing decision-makers. 相似文献
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《Oceanic Engineering, IEEE Journal of》2005,30(3):647-648
The objective of this paper is to theoretically demonstrate how the operational frequency affects the efficiency of a low-speed generator. Due to the varying nature of underwater currents, the voltage from a current power converter has to be rectified first and then digitally reconverted into a stable alternating current. When designing a direct drive generator for water current power conversion, the operational frequency is, thus, a free design parameter and not a fixed value determined by the grid. Finite element method was used to determine the efficiency and weight. A higher frequency means larger frequency-dependent losses, but also a lighter machine. Even at the highest frequency in this study, the frequency-dependent losses were not high enough to overcome the gain of a lighter machine. If a large generator diameter can be allowed, the water current power converter should be designed with as high operational frequency as possible. 相似文献
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The paper presents an experimental study on six circular corrugated cylinders which were tested to destruction under external hydrostatic pressure. The results obtained from these vessels, together with the results obtained from elsewhere, were used to provide a design chart. The design chart appears to be suitable for designing these vessels to guard against inelastic instability. 相似文献