自动化变形监测在围堰施工中的应用

依托连云港港30万吨级航道二期工程项目,针对围堰施工中人工监测效率低、数据获取不准确、不实时等问题,采用自动化监测方法对围堰进行监测,获取围堰变形的监测数据并进行分析.通过传感器自动采集、无线传输等方式,监测人员可远程获取围堰的水平位移和垂直位移数据,使施工期间围堰位移的监测精度和效率得到提高,实现对围堰变形的实时高精...     

自动化测斜监测平台在深海筑堤工程中的应用

海上围堤施工过程中需对深层土体水平位移进行监测，传统监测技术在自然条件恶劣如水深较深、风浪较大或安全风险较大等情况下无法正常实施，且不能满足对监测数据实时采集、分析、反馈，因此，自动监测系统进行实时监测具有重要实用意义。本文主要结合洋山四期海上围堤工程施工监测的实例，介绍了自动化测斜监测平台在深海筑堤工程中的应用，并通过对施工监测数据的分析和及时反馈，实现了对施工进度进行控制，同时对桩基监测平台进行了效益评价。     

船用柴油机燃烧闭环控制用缸压信号实时采集技术

为了提高船用柴油机运行的性能和可靠性,对柴油机缸内燃烧过程进行实时监测和控制的需求越来越强烈,而缸压信号实时采集处理技术是实现燃烧过程控制和监测的重要基础。基于原有控制系统增加燃烧闭环控制过程是最经济和现实的技术途径,因此本文基于柴油机控制系统的嵌入式硬件平台对满足燃烧闭环控制的缸压信号采集技术的要求和实现方法进行分析研究和验证,研究表明该方法能够满足柴油机燃烧闭环控制对缸压信号采集处理的精度和实时性要求。     

星站差分用于远海航道疏浚施工实时水位控制的可行性分析

提出在远海航道疏浚过程中通过采用星站差分获取实时水位的技术方案,对星站差分GPS定位技术进行了介绍,分析了目前现有的远海航道疏浚施工实时水位控制方法,指出现有远海航道疏浚实时水位控制方法存在的不足,通过具体实验对星站差分用于远海航道疏浚施工实时水位控制的高程精度进行验证评定,得出星站差分技术能稳定、高效、高精度地用于远海航道疏浚施工实时水位控制的结论,在业内具有较高的推广价值。     

双树寺水库变形监测GPS控制网的构建及应用

针对双树寺水库安全监测中突出的沉降与水平位移问题,本项目研究采用现代数字测量技术,即使用GPS技术的坐标定位原理,通过建立GPS变形监测控制网,并对其进行调参平差处理。定期开展大坝在水平面和垂直面上的实际水平位移量与沉降量监测。结果表明,GPS大坝变形监测控制能够达到大坝安全监测技术规范要求,且GPS监测技术与传统的观测方法相比,具有节省时间、耗资少、受观测者和外界环境影响小等特点,对于提高水库安全监测及运行管理能力等方面具有重要意义。     

基于VRS技术的外弹道精密测量系统研究

针对靶场外弹道测量采用的GPS单参考站差分定位技术无法满足长基线的精密定位要求的状况,提出基于虚拟参考站技术（VRS）的精密测量方案。通过对靶场VRS系统进行设计并推导出其定位的数学模型,最后分析VRS定位中的主要误差源对系统精度影响,论证了该方案可以完成导弹外弹道高精度、高可靠性和高覆盖范围的实时动态测量要求。     

GPS船舶试航实时数据采集与数据预处理系统

采用GPS技术进行船舶试抗较传统技术具有更高的精度和可靠性。本探讨一种实用的船舶试抗数据实时采集与数据预处理系统,以期提供现场操作简单、性能可靠、能动态显示船舶航行轨迹、信息量较高且能满足各项试航要求的系统。     

基于CORS的自动化监测关键技术

为解决人工形变位移监测效率低、精度差等问题,满足区域形变监测的时空及精度需求,结合长江口项目分析连续运行参考站(CORS)模式下的自动化监测关键技术,并验证各项技术的可行性。监测数据解算成果表明,全球导航卫星系统实时动态监测精度与季度性静态监测精度均可达到1 cm。长江口CORS网下的自动化监测系统可获得高采样率、高精度的监测成果,有效提高变形监测的效率。     

RTK技术在航海上的应用前景

传统的GPS伪码测距的定位精度已经不能满足现代航海自动化和智能化的定位需要。RTK(Real Time Kinematic)技术可以实时提供厘米级的定位信息,并提供船舶的航向、纵摇和横摇数据,可以校验船舶相关仪器的精度,并促进航海科研研究,在航海相关领域有广泛的应用前景。     

极坐标法变形监测精度估算及应用研究

本文主要分析极坐标法变形监测时平面坐标及高程的计算公式,利用误差传播定律推算极坐标法进行水平位移和垂直位移变形监测时的精度估算值。以某水电站大坝的变形监测为例,通过精度计算表推算出观测精度满足规范要求,证明极坐标法进行变形监测的可行性。     

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.     

Journal of Marine Science and Application 2014 Sum. Contents

正~~     

第34届海洋、离岸及极地工程国际会议(英文)

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;     

联合作战计划和执行系统

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。     

Eastbound or westbound ?

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）.     

Recent progress on wave induced loading measurements in warships

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.     

桥梁防撞设施物理模型试验

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。     

印尼某电厂码头水工建筑物设计

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。     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

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.     

开放式数据挖掘系统模型

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。