共查询到20条相似文献，搜索用时 203 毫秒
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海域行政区域勘界是海域使用管理的一项基础性工作,其技术性和行政性均较强。本文介绍了海域勘界界线划定的几种方法,重点详述了侧界线推导法的原理以及运用最小二乘法原理对分界线的拟合,并结合实际需要和技术需求,详细介绍了最小二乘法在海域勘界中的应用研究,为海域勘界提供界线草案的拟定方法。 相似文献
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海域划界中成比例准则的应用研究 总被引：1，自引：0，他引：1
海域划界中的成比例准则是在大陆架划界实践中形成、并在海域划界中得到广泛应用、已成为公平划界基本要求的一项准则 .本文通过对国际海域划界案例的深入分析 ,对成比例准则的含义、产生、应用、在海域划界中的地位、作用及其在我国海域勘界试点工作中的实践进行了探讨 ,有助于在海域划界中的正确理解和准确运用 相似文献
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海洋法与北部湾海洋划界 总被引：1，自引：0，他引：1
本文讨论了海洋划界应遵循的原则公平原则所需考虑的因素及其在北部湾中的体现，这些因素概括起来可分为两个方面：其一为划界海域的地理、地质和自然资源特征；其二为沿涨国在划界海域的历史因素及划界海域对洞海国社会经济的影响，最一，提出北部湾海洋划界应按公平原则，考虑有关情况，通过协商和平解决。 相似文献
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海域划界是一项关系国家主权和权利、民族利益及海洋经济发展的国家行为,是解决国际海域争端有效措施、维护海洋权益的前提和保证,是沿海国家实施海洋战略、发展海洋经济的先决与必要条件,受到沿海国家的高度重视.本文吸取有关海域划界技术和方法著作中的精华,阐述海域划界方面的技术和方法. 相似文献
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河口区域划界是进行河口区域开发管理的重要基础性工作,全面了解和深入研究我国重要河口区域的自然地理情况及管理现状,科学合理的确定河口区陆海分界线已成为当务之急.通过对黄河三角洲的调查研究以及资料收集和处理分析,遵守河口划界的原则,并根据相关的法律和条例,参照国外的河口管理经验以及我国其他河口的划界建议,对现代黄河三角洲陆海划界提出了几种初步建议,并分析了这几种划界方法的优势和不足,推荐使用平均低潮线或黄河口三角洲自然保护区的沿岸界线作为入海口区的陆海界线,海堤作为其他区域陆海界线. 相似文献
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Robert D. Hodgson 《Marine Geodesy》2013,36(2):155-163
The Third United Nations Conference on the Law of the Sea is attempting to codify international law for the use of ocean space. While the process of negotiations continues and many political‐legal problems remain to be solved, certain issues appear to be at, or near, a stage of general agreement. A major element of the emerging consensus involves the “baseline,” the line from which all claims to zones of sovereignty or jurisdiction are measured. In addition, the Conference has generally accepted a breadth of 12 nautical miles for the sovereign territorial sea and 200 nautical miles for a coastal state zone of economic competence. An acceptable definition, in a legal sense, of the continental shelf seems to be provided. A major problem in the division of ocean space among States involves the delimitation of boundaries between adjacent States—those sharing a common land boundary—and opposite States—those situated so as to face each other across bodies of water. The issue remains divisive. The final treaty or convention, if successfully negotiated, will not, however, address technical issues. These important problems will have to be resolved by scientists and technicians concerned with the earth measurements in the post‐treaty era. 相似文献
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K.O.L.F. Jayaweera 《Ocean Engineering》1976,3(5):293-294
Infrared (i.r.) imagery from the NOAA 2,3, and 4 satellites could be used to measure accurately the absolute temperature of the sea surface and sea water. Comparison with measured temperatures indicate that the satellite observed values are within 2°C of those measured. Contouring temperatures and observing temperature fluctuations within 0·5°C is also possible by enhancing the infrared image. This is done by confining the 16 steps of gray of the image to a desired small temperature scale. The existence of open water areas within the pack ice and the positions of the ice edges could be readily distinguishable by generating special imagery in such a way that the gray scale covers two temperature ranges with a gray tone jump at the freezing point of sea water. In this way ice-water boundary appears as a line of demarcation between two different gray tones. Because the i.r. imagery is available all year round these techniques are readily applicable at all times especially during the winter months when the low sun angles make visible imagery not useful. 相似文献
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ZHU Xiaohua 《中国海洋工程》2000,14(4):533-540
According to the fractal theory,the spatial fractal character of coastline is preliminarily dis-cussed on the basis of GIS in this paper.Two aspects are considered:one is the length demarcation ofcoastline with different scales,and the other is the confirmation of existence of the fractal character on dif-ferent boundaries of tidal flats.Finally,some significant conclusions are drawn:(1)The coastline ofJiangsu Province has the fractal character and its dimension is 1.0696.(2)It conforms to the exponentialcorrelation between different lengths(L)of coastline and scales(k).It conforms to the formula lgL(k)=-1.029lgk+2.9544 in the continental coastline of Jiangsu province.(3)Different boundaries of a tidal flathave fractal characters,and different fractal dimensions indicate different comparative intensities of ero-sion and deposition on the tidal flat.(4)The reciprocity between land and sea may affect the value offractal dimension of a coastline,just as the lithology,substantial constituent and geological s 相似文献
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SONG Zhiyao XUE Hongchao YAN Yixin
Doctor Senior Engineer College of Harbor Waterway Coastal Engineering Hohai University 《中国海洋工程》1999,(4)
To deal with the problems concerning the shore boundary,moving boundary and engineeringboundary which are encountered frequently in 2D tidal current simulation by the finite difference method,theconcept of line boundary is introduced and studied here,and then the line boundary technique in common useis proposed in this paper.Analysis of some calculation cases shows that this technique is practical,effective,and simple in 2D tidal current simulation involving different boundaries. 相似文献
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三角洲型河口河海划界 总被引：4，自引：0，他引：4
河海界限不是一个固定的断面，受制于径流、潮汐、风暴和地形等自然因素，河水与海水接触处的时空变化大。通过对黄河口和珠江口地区的河海划界的讨论，认为三角洲型的河口区海陆划界不能以咸水内侵、淡水冲出及生态环境等具有明显季节性的特征为依据，而应根据河口三角洲典型的地貌特征、沿着三角洲平原与水下三角洲前缘的界线划分，符合自然特征。 相似文献
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The use of ship's radar for collision avoidance presents a fundamental problem in threat detection and identification since all vessel radar returns ("paints") look alike. As a result, when a ship master caught in a fog is trying to use his radio-telephone to work out a maneuvering plan with another vessel, it is difficult for him to identify which blip on the planar position indicator PPI is the source of the voice on the radio. One solution now receiving worldwide attention is to fit all vessels with active transponders. The marine radar interrogator-transponder (MRIT) is an advanced form of transponder which includes an integral interrogator and works in coordination with the ship radar to provide not only target identity and "clutter-free" target paints, but also maneuvering information and such data as target's course, speed, draft, safe or dangerous cargo, etc. Mounted on a fixed navigation aid, the transponder portion alone can also function as a racon (radar beacon). This paper describes the operational parameter and reviews the system bench tests and sea trials. 相似文献