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1.
珠江河口是世界上最复杂的河口之一,进行整体水流模拟是比较困难的。介绍了自行开发的珠江河网河口湾一、二维联解整体潮流数学模型及大范围整体潮汐物理模型,两种技术手段相辅相成,较好地解决了该河口潮流运动的整体模拟问题。以特大型跨河口工程——港珠澳大桥为例,介绍了两种模型的应用情况,在数学模型中引入通度系数控制工程复杂边界过流量,取得了较好的模拟效果。  相似文献   

2.
本软件利用记录海流流速流向信息的文件,对河口海岸海流矢量进行绘制,得到包括*.bln、*.plt、*.kml、*.scr、*.shp等多种格式的文件,可以直接在制图软件中进行使用,得到清晰明了的海流矢量图,方便快捷,可广泛应用于港口航道、河口整治、海岸开发等河口海岸工程研究领域。  相似文献   

3.
总结进入新世纪以来我国粉沙质海岸、河口、岛群泥沙运动规律研究的新突破,沿海深水港口、航道和巨型河口航道整治技术的新进展,新材料的开发以及信息化、智能化技术的应用等;深入分析港口建设技术的发展趋势,并论述建设资源节约、环境友好型港口和复杂自然条件下沿海深水港口、航道建设面临的重大技术问题。  相似文献   

4.
具有滨江临海区位优势的江苏南通大手笔贯彻落实沿海开发战略,11月21日,该市召开冷家沙开发研究工作专家咨询会,开始着手新的沿海沙洲——冷家沙的开发研究工作。中国科学院院士、华东师范大学河口海岸研究所名誉所长陈吉余教授、河海大学校长张长宽教授等专家对冷家沙开发提出了有益的意见和建议。  相似文献   

5.
以"长江南京至浏河口段数字航道与智能航运建设示范工程"为依托,基于Android移动开发平台,开发航标动态移动监控系统。该系统操作灵活,携带方便,可有效地解决航标维护过程中存在的生产效率低、故障告警和维护响应周期长的难题。  相似文献   

6.
李瀛  曾乐  李有为 《水运工程》2019,(6):126-131
长江干线重点支流河口航标配布缺乏统一配布原则和方法。采用分类研究的方法,根据河口地形及干线航道布置特点,将河口分为沿岸航道(或偏靠河口侧的河心航道)类、干线航道与支流河口间有一定距离类,确定不同类别河口航标配布所使用的航标种类,并分别根据标示支流河口位置、标示干支航道交汇点、标示干线航道与支流航道连接段航道界限与碍航物、提示支流河口信息的总体原则对不同类别的支流河口提出相应的航标配布方案,为类似工程提供参考。  相似文献   

7.
今年内,我国内河第一段数字航道将在长江下游南京至浏河口311公里航段建成。届时,航行在这段航道的船舶将可以使用长江航道局全新开发的电子海图,实现卫星导航。  相似文献   

8.
用FOXPRO FOR WINDOWS开发船舶数据处理系统是一门全新的技术。南京--浏河口航段船舶数据处理系统的成功开发表明FOXPRO FOR WINDOWS开发船舶数据处理系统,具有很好的人机交互界面,能够多窗口、多任务地协调,深得用户的青睐。  相似文献   

9.
浮泥特性研究进展   总被引:4,自引:1,他引:3  
<正> 1 前言浮泥(fluid mud)是淤泥质海岸河口地区特有的一种泥沙运动形态,早在五十年代,我国在天津新港回淤研究中就有所发现,以后在黄河口、长江口、连云港及其他淤泥质海岸河口地区也相继发现。在国外,浮泥现象也屡见报导,如法国的纪龙德河口、芦瓦尔河口、维伦河口(Vilaine)、赛夫勒河口(Sevre)、英国的泰晤士河口、美国的密西西比河口、泰国的渭南河口以及维塞河口(Weser)、波勒特河口(Perrett)、勃列斯托尔河口和一些淤泥质海岸均发现浮泥。由于浮泥与航道港口淤积、海岸河口演变、航行水深利用等许多实际问题有关,因而引起了广大科技人员的重视,开展了多方面的研究,并在实际应用中取得了一定的成果。  相似文献   

10.
长江口南槽航道进一步开发的基本思路及框架*   总被引:1,自引:0,他引:1       下载免费PDF全文
以长江口南槽河势现状及碍航性质为切入点,分析南槽航道开发条件,并探讨其进一步开发的基本思路及框架。研究分析表明,南槽河势在长江口深水航道治理和南汇边滩围垦等工程作用下处于相对稳定阶段,航道开发条件良好,但同时面临九段沙湿地国家级自然保护区和邻近港口航道安全运营等约束限制。为进一步开发南槽航道,应着眼于河口整体性,统筹兼顾、协同开发;立足于航道条件,整体规划、分期推进;注重开发时机,因势利导、择机实施。  相似文献   

11.
Errata     
正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.  相似文献   

12.
13.
正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;  相似文献   

14.
联合作战计划和执行系统   总被引:2,自引:1,他引:1  
全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划:时间不限的精密预案计划生成作战计划、方案计划或职能计划;时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础,加速应付危机的能力。  相似文献   

15.
In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama?
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou).  相似文献   

16.
Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.  相似文献   

17.
桥梁防撞设施物理模型试验   总被引:1,自引:0,他引:1  
物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。  相似文献   

18.
詹明  郑厅厅 《港工技术》2010,47(4):17-19,23
印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。  相似文献   

19.
Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.  相似文献   

20.
开放式数据挖掘系统模型   总被引:2,自引:0,他引:2  
目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较,都与国外软件存在着较大的差距。随着数据仓库技术的普及,数据挖掘应用的需求越来越强烈,如何缩短这种差距,研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型,该系统模型从可扩展性、可重用性、易用性等方面得到了加强。  相似文献   

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