钱塘江强潮河段江道缩窄治理研究   总被引：1，自引：0，他引：1  

陈来华  潘存鸿 《海洋工程》2008,26(2):96-102

对钱塘江强潮河段江道缩窄治理进行研究。首先,回顾治理方案的比选,江道全线缩窄时河轴线线路和河道宽度的确定原则,以及不同河段的指数放宽率。然后,介绍了在涌潮汹涌、滩涂淤坍变化剧烈的强潮河段,实施筑堤所采取的工程措施的步序与要点。最后,分析论证了大规模江道缩窄治理后河床、潮汐、洪水位及涌潮高度等特征值的变化。可供进一步深入理论研究和工程施工参考运用。  相似文献   

海洋主体功能区划与海洋功能区划关系研究     

王倩  郭佩芳 《海洋湖沼通报》2009,(4)

开展海洋主体功能区划与海洋功能区划的关系和衔接研究,是保障两者在我国海洋事业中充分发挥各自作用的基础.本文从编制及实施2个方面理顺海洋主体功能区划与海洋功能区划的关系,促进两者在实际工作中的相互结合.  相似文献   

基于全站仪观测数据的三维平差模型及数据处理   总被引：1，自引：0，他引：1  

陈珍  徐景田  孙华 《测绘工程》2009,18(3):40-44

建立基于全站仪多维观测数据的三维网平差模型，用VisualBasic语言编制计算程序，使其自动完成控制网的平差，解决实际应用中全站仪采集数据和成果处理中存在的问题，指导测绘生产，使全站仪更方便地用于地形控制测量、工程控制测量等测绘工程中。  相似文献   

Comparison of Kuqa foreland basin with Persian Gulf Basin in salt tectonics   总被引：1，自引：0，他引：1  

Guimei WAN    Liangjie TANG    Wenzheng JIN  . Basin  Reservoir Research Centre  China University of Petroleum  Beijing  China. Key Laboratory for Hydrocarbon Accumulation Mechanism of Ministry of Education  China University of Petroleum  Ministry of Education  Beijing  China 《东北亚地学研究》2007,10(2):156-165

Compared Kuqa foreland basin with Persian Gulf Basin in development of salt layers, salt tectonics, and the relation between salt tectonics and hydrocarbon, it is concluded that the salt diapirs are relative to hydrocarbon. Searching salt diapirs and related traps in Kuqa foreland basin is important. The forming mechanism of salt tectonic in Kuqa foreland basin is different from that of Hormuz Series, but similar to that of Lower Fars Series/Gachsaran Formation. Inspired by the role of salt tectonics of Lower Fars Series/Gachsaran Formation in hydrocarbon accumulation, the authors considered that the exploration below salt layer should be enforced, and the traps below salt layer in the southern part of the Kuqa foreland basin would be found where salt layer is thicker. On the contrary, the traps should be found both above and below the salt layer in front of the northern mountain where salt layer is thin. The Triassic and Jurassic source rocks are rich in this area with great exploration prospective.  相似文献   

Comparison of Kuqa foreland basin with Persian Gulf Basin in salt tectonics     

Guimei WAN  Liangjie TANG  Wenzheng JIN 《世界地质(英文版)》2007,10(2)

Compared Kuqa foreland basin with Persian Gulf Basin in development of salt layers, salt tectonics, and the relation between salt tectonics and hydrocarbon, it is concluded that the salt diapirs are relative to hydrocarbon. Searching salt diapirs and related traps in Kuqa foreland basin is important. The forming mechanism of salt tectonic in Kuqa foreland basin is different from that of Hormuz Series, but similar to that of Lower Fars Series/Gachsaran Formation. Inspired by the role of salt tectonics of Lower Fars Series/Gachsaran Formation in hydrocarbon accumulation, the authors considered that the exploration below salt layer should be enforced, and the traps below salt layer in the southern part of the Kuqa foreland basin would be found where salt layer is thicker. On the contrary, the traps should be found both above and below the salt layer in front of the northern mountain where salt layer is thin. The Triassic and Jurassic source rocks are rich in this area with great exploration prospective.  相似文献   

Evaluating the efficacy of technical measures: a case study of selection device legislation in the UK Crangon crangon (brown shrimp) fishery     

Catchpole  Tom L.; Revill  Andrew S.; Innes  James; Pascoe  Sean 《ICES Journal of Marine Science》2008,65(2):267-275

  相似文献   

闽南沿海地区不同日观测次数大气稳定度的对比     

张夏林  李棠华  黄光明  吴万恭 《台湾海峡》2000,19(3)

本文通过地处闽南沿海地区崇武气候站不同日观测次数大气稳定度的对比分析表明 :采用 8个时次和 4个时次观测记录所统计的稳定度频数 ,误差较小(与 2 4个时次比较 ,下同 ) ,对重要结论无大影响 ,能够较准确地描述大气稳定度的状况和特征 ;而采用 3个时次观测资料分析 ,其误差大 ,甚至导致相反的结果 ,实际应用时必须慎重。  相似文献   

恶性骨肿瘤化疗前后影像学比较及疗效     

王晓婷 《CT理论与应用研究》2004,13(3):24-29

目的探讨恶性骨肿瘤化疗前后影像学比较. 方法首先影像学的比较是在X线平片、CT扫描、MRI等各自的比较下, 收治恶性骨肿瘤31例,其中骨肉瘤15例,尤文氏肉瘤4例,滑膜肉瘤4例,纤维肉瘤8例.根据不同肿瘤的组织学特征及对抗肿瘤药物的敏感性来选择. 结果化疗后,使临床疼痛减轻,肿块缩小,影像发生改变,病灶周边由模糊变得清晰.骨硬化及环状骨包壳增多,肿瘤的新生血管减少,上述改变效果明显的14例,有效率45%,部分有效为9例,无明显改变的8例. 结论对上述恶性骨肿瘤化疗后影像学改变的比较,基本证实了肿瘤细胞坏死率大于90%,患者5年生存率为80-90%,有些患者通过综合的治疗,肿瘤得到控制,其中部分患者效果不明显,甚至无效,这个过程应是一个远期观察疗效才能做比较,化疗效果满意的,为骨肉瘤、尤文氏肉瘤及滑膜肉瘤;化疗效果不佳的,为纤维肉瘤、部分骨肉瘤、个别肿瘤体积大的、恶性程度高的患者.  相似文献   

Implementing adaptation in developed countries: an analysis of progress and trends     

FRÉDÉRIC GAGNON-LEBRUN  SHARDUL AGRAWALA 《Climate Policy》2013,13(5):392-408

Little attention has been paid thus far to the experiences of developed countries in adapting to climate change. This article addresses this research gap by providing an assessment of broad trends in progress on planning and implementing adaptation in developed countries. Primary inputs are the National Communications (NCs) by these countries to the United Nations Framework Convention on Climate Change (UNFCCC), although the article also discusses illustrative examples of recent adaptation activities that have not been covered in the NCs. NCs reflect ‘whole government’ perspectives and follow a standardized reporting format, which facilitates cross-national comparisons. The analysis shows that impacts and adaptation receive limited attention within NCs. The discussion on impacts and adaptation has typically been dominated by climate scenarios and impacts analysis, while the discussion on adaptation is often limited to the identification of generic options. There are signs of recent progress, however, in the Third and especially the Fourth NCs, in which a growing number of developed countries report on establishing frameworks for adaptation and on efforts to implement adaptation measures that take future climate into account. Although an encouraging sign, it is still too early to assess the eventual impact of such measures.  相似文献   

IMU/DGPS辅助空三下几种布点方案的精度比较     

荣幸 《测绘与空间地理信息》2014,(5):198-199

主要介绍了在IMU/DGPS辅助空三的情况下,通过对不同的布点方案进行空三加密,对这些空三成果进行精度比较与分析,分析POS辅助空三在无地面控制点或少量的地面控制点的情况下能获得怎样的精度,能满足多大比例尺的成图要求。  相似文献