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在对海洋观测数据进行大规模集成时,需要对现有数据源的观测要素与集成系统的观测要素之间建立匹配映射关系,由于海洋观测数据源存储结构复杂,数据转换计算量大,造成海洋观测要素匹配耗时长、错误率高等问题,阻碍了异构海洋观测系统的大规模集成。文中提出了一种新的海洋观测要素自匹配方法,采用边缘计算降低网络传输数据量;采用分组快速搜索算法和ω-KNN算法提高要素匹配准确性和效率。利用实际的海洋观测数据集搭建原型系统,对海洋观测要素自匹配方法进行验证,结果表明该方法执行效率提高2.67倍,准确率达到96%,在保证海洋观测要素匹配准确性的同时,进一步提高了要素匹配效率。 相似文献
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近年来,在海洋灾害预测、预报等海洋信息产品的开发中,对准确、大量、连续、实时的海洋要素监测数据的依赖性日趋增强。同时,由于海洋数据的复杂性,数据来源的多源性,数据平台异构,数据格式不规范等原因,增大了数据集成的难度,降低了数据使用的效率。文章提出了用XML作为传输媒介,结合Socket网络通信技术,建立实时海洋数据传输网络系统,实现了海洋数据集成与交换格式的统一,屏蔽了影响海洋数据集成和使用效率的因素。文章对XML在海洋信息产品开发中的应用做出了有益的探索和尝试,旨在促进XML在我国海洋信息领域的应用。 相似文献
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为适应已成熟的海洋地理信息系统和海洋遥感应用模块技术及海洋信息业务化运行的需求,迫切需要开发海洋地理信息系统与海洋遥感应用模块集成来实现海洋信息一体化服务。针对当前平台技术水平和应用模块特性,设计了开放性三层集成框架,即数据层采用基于中间插件的二级三库集成机制、功能层采用基于API,DLL,EXE,COM组件的集成模式和应用层上基于Web Services的共享机制。以中国海岸带及近海卫星遥感综合应用系统平台(MaXplorer1.0)与多元生态遥感融合与同化模块和海浪遥感信息提取模块等八大海洋遥感应用模块为实例进行数据层、功能层和应用层的集成。集成结果表明,两者的集成实现了海洋信息资源与技术的整合,为海洋信息的业务化运行提供了技术支撑。 相似文献
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利用WEBGIS技术，针对海洋监测数据信息的多源异构、多时空和多尺度的特性，进行空间数据格式集成方法的分析和研究。根据相关的海洋监测预报业务的专业需求，充分利用现有的海洋监测资料，进行数据分析和挖掘、系统规划和研究，建立相关数据库模型Geodatabase，并采用ARCSDE和ARCIMS工具软件来构建海洋监测信息WEBGIS平台。 相似文献
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通过研究设计东海区共享网络、海区观测预报专题地图以及观测数据及预报产品共享工作流程,旨在搭建一套集观测预报数据共享、预报制作共享及平台服务共享于一体的东海区海洋观测预报减灾信息共享平台框架。该平台主要利用数据库及中间件技术实现东海区海洋观测资料及预报产品共享,并通过设计风暴潮预报制作系统,以及计算资源整合方案,实现预报业务的工作模式及资源共享,使预报资源效能发挥最大化;最终基于Web GIS建立一套信息展示共享平台,向共享网络内的专业用户及决策部门发布专题地图、观测数据、预报产品及减灾信息。通过以上研究工作,最终将实现观测预报数据共享--预报制作共享--平台服务共享的一体化、自动化业务流程。 相似文献
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<正>我国是海洋大国,海岛众多。海岛是壮大海洋经济、拓展发展空间的重要依托,是保护海洋环境、维护生态平衡的重要平台,是捍卫国家权益、保障国防安全的战略前沿。2009年12月26 相似文献
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The New Zealand Waters Pollution Regulations 1963, referring to recreational water to which the public can gain access, states that the “coliform bacteria content shall not consistently exceed 1,000/100 ml”. This standard is now under revision, and the suggested new standard is a median faecal coliform index of 200/100 ml with a maximum value not exceeding 400/100 ml. Recent literature supports the use of faecal coliform sub‐group bacteria as the best indicator of faecal pollution and reference is made to the membership of this sub‐group. Inherent inaccuracies of the Most Probable Number (MPN) method of assessing bacterial populations are pointed out, such as experimental variations with different cultural media, and possible errors in interpretation of results. In North America, there is evidence that an MPN for the total coliform group of 1000/100 ml indicates a faecal coliform sub‐group MPN of 200/100 ml, and epidemiological experience supports these values as standards. We tabulate and discuss evidence that the usual ratio of faecal coliforms : coliform group bacteria is typically 1 : 1 in fresh and marine waters of the Wellington region, and that a more attainable standard would be 500 faecal coliforms/100 ml. In ratios quoted in this paper, ‘coliform group’ means the remainder of the coliform group excluding faecal coliforms. The World Health Organisation (1963) definition, of the entire group of coliforms, is not intended. The ratio is different in other parts of New Zealand; in Auckland, for example, the ratio is close to that found in the United States. 相似文献
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《Marine Policy》2015
This paper systematically reviews and synthesizes peer-reviewed, English-language scientific publications (n=212) to identify relevant research about how Ecosystem-Based Adaptation (EBA) is integrated with coastal planning. Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) methodology is applied in this study. Attention was given to studies concerning human-environment interactions as opposed to physical or biological climate change issues alone because the coastal planning and EBA approach addresses the management of human actions in nature. The literature references include the issue of climate change (77%); however, limited evidence of EBA in coastal areas are reported (18%), and it is evident that the issues have become relevant in the scientific literature published in recent years. Broad texts demonstrate that SLR is one of the major long-term impacts (68%), and all of these papers recognize the most affected ecosystems in the tropics would be mangroves. EBA is an emerging option that can offset anticipated ecosystem losses and improve coastal planning to cope with SLR because it provides benefits beyond climate change stressors. There is a need to synthesize a road map for incorporation of mangrove regulations into local planning instruments and for building capacity for their implementation. Application of PRISMA in marine science will enhance future reviews, facilitate the systematic search and adequately document any theme, and also be useful in determining research gaps or information needs. 相似文献
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《Coastal Engineering》1999,36(3):263-269
Using the logarithmic wind profile and typical values of dimensionless sea roughness for different sea states, simple power expressions are derived for the wind profile over water. The power expressions are useful for correcting measured wind speed data at a given elevation (up to an elevation of 60 m) to the standard elevation of 10 m commonly used in coastal engineering studies. The analysis shows that the 1/7 power expression (suggested in [U.S. Army Corps of Engineers, 1984. Shore Protection Manual, Vol. 1. Coastal Engineering Research Center, Vicksburg, USA.] and commonly used today) is a good approximation (<3% error) of the logarithmic profile for various sea states up to an elevation of 20 m. Above this elevation, the 1/7 power expression underestimates the wind speed for moderate to fully developed sea states. 相似文献
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《Marine Policy》2014
This paper summarises research and options for sustainable sea transport in Oceania with a focus on domestic shipping. This debate is situated initially within the context of the current Pacific domestic shipping scenario, a region of minute economies connected by some of the longest sea transport routes in the world. All current options are fossil fuel powered and increasingly uneconomic and unsustainable. Many routes are marginal or unviable and a vicious cycle of old ships replaced with old ships prevails. Although a central and essential issue of many Pacific communities, the option of pursuing sustainable sea transport is currently invisible within the policy space at all levels. Various renewable energy options are possible and increasingly available. Recent research finds that these have strong potential for providing benefits across multiple wellbeings. The barriers to pursing this agenda are complex and poorly understood but are perceptual and institutional more than technological. A small number of critical experiments during the last oil crisis provide critical lessons and direction. 相似文献
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日本在日前发表的《信息通信白皮书》中提出，要建立网络无所不在的社会；美国1999年提出了“21世纪信息技术计划”，由此看出，信息社会正向人类走来，人们唯有通过网络才能快捷、有效地获得有用信息，海洋产业唯有借助网络才能推动科学研究，有效地利用海洋资源，促进海洋经济发展，海洋信息共享工程建设势在必行。标准化原理能确保海洋信息共享工程建设有序、高效、质量优良。 相似文献
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提出了一种用于对不连续压力采样序列的傅立叶分析方法.此方法将周期函数展开成傅立叶级数,但在数值积分时取函数周期内有采样值的区间作为积分域,然后求解线性方程组得到傅立叶级数的系数值.为了检验本方法的有效性,利用此方法对解析函数进行了拟合,当一个周期内的取样时间大于1/2周期时,利用此方法能够得到满意的结果.利用实验方法研究了波浪作用下截断圆柱表面的压力分布.在波浪作用下静水面附近的测点在露出水面时没有压力值.利用所提出的傅立叶分析方法对略低于静水面位置的实测压力进行了分析,拟合结果与实测结果吻合很好,说明此方法在处理物理模型实验中间断采样得到的数据是有效的.利用数值方法对波浪压力进行了计算,并将一阶和二阶波压力的数值结果与实测值进行了比较. 相似文献
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《中国海洋工程》2018,(4)
正Aims and Scope Being an international journal,China Ocetan Engineering(COE)takes its prime function as the integration of new research concepts,equipment,technology,materials and.structures and other scientific advances within the field of estuarial,coastal,offshore,and deepwater engineering with particular reference to developments.The Journal is concerned with all engineering aspects involved in the exploration and utilization of ocean resources.Topics regularly covered include research,design and 相似文献