共查询到19条相似文献，搜索用时 156 毫秒
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新西兰地理委员会是政府法定机构,下设海底地名委员会作为海底地名工作的咨询机构,依据《2008年新西兰地理委员会法案》负责海底地名工作。2016年9月6日公布《新西兰海底地形命名标准——NZGBS 60000》,代替了2009年3月13日公布的《海底地形命名暂定标准——NZGBS60000》,该标准设立了新西兰地理委员会海底地形命名的准则和原则。我国的海底地形命名工作起步相对较晚,文章通过对新西兰海底地形命名工作的相关机构、标准化政策和指导方针的研究,提出我国海底地形命名工作的相关建议:(1)制定统一的海底地形命名标准和规范;(2)扩大海洋调查范围;(3)认真研究把握好提交提案的工作。 相似文献
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结合我国向海底地名分委会(SCUFN)提交海底地名提案的工作,介绍了海底地名专题图编制关键技术与难点,并对Arcgis、Global Mapper和Surfer制图平台进行对比。鉴于Arcgis以空间数据库的形式分析和管理海底命名信息具有显著优势,Global Mapper在格网数据的加载、实时三维显示和数据裁剪方面表现出色,Surfer在制作三维图方面具有操作简单、图形美观等优势,将三者优势结合起来,制定了海底地理实体专题图的编制方案,实现数据联合应用。编制方案能达到满足海底命名图件制作要求、提高制图效率的目的,为我国海底地名专题图编制工作提供技术参考。 相似文献
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分析了南海诸岛地名的历史和现状,通过比对历史资料和现代精细化海洋测量数据,发现了南海诸岛地理实体特征与其名称关系匹配存在的不足。归纳总结了4个方面问题:(1)地名指代地理实体的范围不明确或不合理;(2)部分地理实体名称未对外公布;(3)新发现的地理实体未被命名;(4)部分不存在的地理实体未被销名。通过列举多个地名的使用情况,基于精细化测量数据分析地理实体的形态、性质、特征等基础信息,研究了处理方法,制定了解决方案。从新技术应用、建立资源共享机制等方面,对进一步开展南海诸岛地名研究工作提出了建议。 相似文献
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This communication is dedicated to the investigation history and naming of the undersea morphostructures of the Sea of Japan for the last 50 years. Many of them were first described and studied during long-term geological-geophysical investigations in this basin carried out by Russian scientists. The analysis of 60 names of its undersea feature names revealed that only approximately half of them are cited in the GEBCO Gazetteer some of the undersea morphostructures are known under two or more names, the origin of their names is unknown, or their names were chosen voluntarily. For maintaining the priority of Russian investigations, the nomenclature and names of the undersea features should be adjusted in accordance with the national and international principles and regulations. 相似文献
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Naming of undersea features 总被引：2，自引：0，他引：2
Arnold H. Bouma 《Geo-Marine Letters》1990,10(3):119-125
The Intergovernmental Oceanographic Commission (IOC), the International Hydrographic Organization (IHO), and the joint IOC/IHO Guiding Committee for the General Bathymetric Chart of the Oceans (GEBCO) have expressed considerable concern about the indiscriminate and unregulated naming of undersea features which often go into print without any close scrutiny. An author may not realize that the feature has a name already, maybe in another language, or that his terminology conflicts with established definitions.Geo-Marine Letters wants to follow the IOC/IHO/GEBCO recommendations and requests that its authors follow the set forth guidelines. Examples of terms and definitions are given and addresses of national authorities provided. 相似文献
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船坞内制作的大型结构物浮运沉放到海底的支撑基础上之后,受其自重及基础强度等因素的影响,在其初期会有一个明显沉降过程;为研究其沉降规律性,须对其进行监测.由于结构物在海水面以下,其底部位置靠测量设置的塔目标位置反求.通过对某电厂取水工程的海底取水头监测,介绍了监测方法及其沉降数据规律. 相似文献
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江豚(Neophocaena phocaenoides G. Cuvier)俗称江猪,属鲸目(Cetacea),齿鯨亚目(Odontoceti),鼠海豚科,是海豚类中最小型的一种,也是我国沿海最常见的一种近岸小型无鰭鼠海豚。一般体长不超过2米,体重约30-80公斤,如图1照片所示。
江豚与其他海洋哺乳动物一祥,能发出多变的声信号,而且每一种声信号都受其生态行为的支配。发声系统是它们赖以生存的重要官能。海豚用其发射的声信号测定水下目标的距离、方位和大小,以至判断其形状,因而能有效的绕过障碍,避开或驱逐来犯之敌。依靠其声信号能更有效的捕获足够的食物,营养自身,抚育后代。声信号是海洋哺乳类动物在自然界进行生存斗争的有利武器。声信号又是海洋哺乳动物的语言,借以进行“社会”联络和通讯,甚至教育它们的后代。为此。人们把它们的这种功能称作“第六官能”(sixth sense)。
观察海兽类的声学行为,测试分析其声信号的结构和物理特性,是揭示它们的回声定位系统的机制,破译其“语言”奥密所必不可少的一步。从而将为驯养它们成为人类的水下得力“助手”提供可靠的实验方案,也将为仿生学等新的学科研究提供有效的理论依据。
本实验是为了把江豚驯养成“水下警犬”使其在海湾、河口进行人工放养鱼群的放牧,以及协助人类进行水下作业等目的而进行的基础工作,也是研究海洋哺乳动物回声定位的发射与接收机制的探索。实验工作是在一定的半自然条件下,对江豚某些生态行为下的声信号作了较详细的记录与分析。 相似文献
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As a kind of transportation mode for crossing channels,undersea tunnel has incomparable advantages for its directness,convenience,fastness,insusceptibility to weather conditions,and smaller influences on environments.In recent years,with the development of undersea tunnel construction,the design and construction technologies have been greatly enhanced.The first undersea tunnel in China has just been built.Waterproofing is the key technique of undersea tunneling.A new concept of waterproofing scheme of grouting,sealing,draining and divided sections was adopted in the construction of the tunnel based on the researches,the in-situ geological features,the astuteness of the current technology,and the cost of construction.The structural details of the sealing and draining system are introduced to illustrate the salient features of the new waterproofing technique.It is hoped that experiences described in the paper can offer guidance for the construction of the extensive undersea tunnels in the coming years. 相似文献
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沉管在海底的位置靠露在水上的测量棱镜塔目标位置反求,为及时知道水下对接数据,调整施工,要求计算机实时通讯,同步观测棱镜目标,实时显示水底管段的位置特征。结合嘉兴电厂海底隧道工程,介绍了沉管隧道对接的测量理论和实施措施。 相似文献
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中国近海海面风场的时空特征分析 总被引：1，自引：0，他引：1
本文利用1987年9月—2013年9月连续26 a的多源卫星融合数据,用经验正交函数方法(EOF)分析中国近海海面风场变化特征。分析结果指出中国近海海面风场的第一模态占总方差贡献的63.94%,呈现为冬-夏季风振荡类型,揭示了中国近海风场的季节变化特征;第二模态占总方差贡献的12.35%,呈现为春-秋振荡类型,反映了冬季风和夏季风过渡时期的变化特征;第三模态占总方差贡献的3.49%,呈现出近似半年周期的波动,体现了中国近海风场季节内变化的特征。 相似文献
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The necessity and the preliminary tentative plan for the construction of the undersea tunnel across Taiwan Strait are expounded in this atricle. The strait undersea tunnels, which have been built and investigated in the world, and their engineering characteristics and construction methods have been introduced herein briefly. Taiwan has been a part of China since ancient times and the people between the mainland and Taiwan are kindred compatriots in the extended family of the Chinese multinational country. For a long time, the people between southeast of China and Taiwan have had frequent communication in economy and culture. With the progress of times and the need of development, it has been put forward to build a safe and reliable undersea tunnel that is not affected by the environment across Taiwan Strait, and one which is also a magnificent project for the China in the long-term. Whether by using a bridge or an undersea tunnel or both across the strait is a problem worthy of further research. According to such conditions as the weather of Taiwan Strait, depth of water, undersea terrain, possibility of engineering and hydrological geology under the sea, as well as the possibility of Taiwan Strait as a main shipping passage from south to north of China and the experience of existing passage across strait in the world, the primary analysis shows that the scheme of an undersea tunnel should be considered. Therefore the concept of the undersea tunnel engineering across Taiwan Strait is introduced in detail here. 相似文献