网络R7K流动站系统集成的探讨

对国外、国內多种类型GPS接收机,按不同的通讯链路、接入不同CORS系统的相关配置工作进行分析、归纳,从设备选型、系统集成、CORS系统的接入三个方面对网络RTK流动站系统的集成进行了探讨.     

高程基面问题浅议

介绍国内现存的几种高程基面,分析工程中使用高程基面时存在的问题,提出测量系统规范化、标准化的紧迫性和必要性。     

城市地下空间管理实景化

阐述了城市地下空间管理的重要性,提出了一种新型的地下空间管理方法——基于实景可量测地图的地下空间管理,用于提高城市地下空间资源管理和应急管理水平,     

Surface current field and seasonal variability in the Kuroshio and adjacent regions derived from satellite-tracked drifter data

The muhiyear averaged surface current field and seasonal variability in the Kuroshio and adjacent regions are studied. The data used are trajectories and （1/4） ° latitude by （1/4） ° longitude mean currents derived from 323 Argos drifters deployed by Chinese institutions and world ocean circulation experiment from 1979 to 2003. The results show that the Kuroshio surface path adapts well to the western boundary topography and exhibits six great turnings. The branching occurs frequently near anticyclonic turnings rather than near cyclonic ones. In the Luzon Strait, the surface water intrusion into the South China Sea occurs only in fall and winter. The Kuroshio surface path east of Taiwan, China appears nearly as straight lines in summer, fall, and winter, when anticyclonic eddies coexist on its right side; while the path may cyclonically turning in spring when no eddy exists. The Kuroshio intrusion northeast of Taiwan often occurs in fall and winter, but not in summer. The running direction, width and velocity of the middle segment of the Kuroshio surface currents in the East China Sea vary seasonally. The northward intrusion of the Kuroshio surface water southwest of Kyushu occurs in spring and fall, but not in summer. The northmost position of the Kuroshio surface path southwest of Kyushu occurs in fall, but never goes beyond 31 °N. The northward surface current east of the Ryukyu Islands exists only along Okinawa-Amami Islands from spring to fall. In particular, it appears as an arm of an anti- cyclonic eddy in fall.     

Theoretical Model and Dynamic Analysis of Soft Yoke Mooring System

As a popular solution for mooring an FPSO （Floating Production, Storage and Offloading） permanently in shallow water, the soft yoke mooring system has been widely used in ocean oil production activities in the Bohai Bay of China. In order to simulate the interaction mechanism and conduct dynamic analysis of the soft yoke mooring system, a theoretical model with basic dynamic equations is established. A numerical iteration algorithm based on error estimation is developed to solve the equations and calculate the dynanfic response of the mooring system due to FPSO motions. Validation is conducted by wave basin experimentation. It is shown that the numerical simulation takes only a few iteration times and the final errors are small. Furthermore, the calculated results of both the static and dynamic responses agree well with those ones obtained by the model test. It indicates that the efficiency, the precision, the reliability and the validity of the developed numerical algorithm and program are rather good. It is proposed to develop a real-time monitoring system to further monitor the dynamic performance of the FPSO with a soft yoke mooring system under various real sea environments.     

福建东山岛附近海域造礁石珊瑚共生藻的分子系统分类和遗传多样性研究

本研究利用核糖体大亚基5'端序列PCR-RFLP以及转录单元内间隔区(Internal TranlsclqIbed Sppacer,rrS)序列分析相结合的方法,首次对福建东山岛附近海域3种优势种类造礁石珊瑚共生藻进行了分子系统分类和遗传多样性研究.PCR-RFLP分析发现东山岛附近海域3种优势种类造礁石珊瑚共生藻都属于C系群共生藻,而ITS序列的序列分析结果表明东山岛附近海域3种优势种类造礁石珊瑚共生藻都属于C1亚系群.研究结果表明ITS序列进化速度快,适合于造礁石珊瑚共生藻属亚系群水平的鉴定.而东山岛附近海域造礁石珊瑚共生藻的多样性低,暗示东山岛附近海域造礁石珊瑚共生藻共生系统面对外界环境压力的适应能力较低.     

贝克石油工具公司推出新型油藏优化系统

在2007年SPE年会上,贝克石油工具公司发布了最新设计完成的油藏优化系统EQUALIZER。该系统可以有效地解决水平井、多分支井和大斜度井出现的早期水气突破等完井问题,延长油井寿命,利用较少的井眼与油藏保持更大的接触面积,最大限度地提高油气采收率,增加油田的经济效益。     

海底孔内水合物观测系统与钻井实施

通过耦合布设海底表面和孔内水合物观测系统获取物理、化学、微生物等数据是了解掌握海洋水合物环境动态变化、碳循环规律和资源开发技术的有效手段,据此初步提出了一套海底孔内水合物观测系统,并指出了系统的关键技术难点。而在钻井布设该孔内观测系统时,要注意防止井内安全事故的发生,充分评估安放位置处含水合物地层的地质力学稳定性并采取适当的钻井和完井方式稳定或强化含水合物地层以支撑孔内观察仪器,实现孔内长期监测。最后讨论了在我国南海实施孔内水合物观测系统的必要性,并提出了初步想法。     

基于GIS的专题地图编制及其应用研究

从专题地图的种类、特点、用途及其发展演变出发,运用专题地图编制、数字制图技术以及GIS的观点与方法,并结合相关应用实例,阐述基于GIS的专题地图编制的有关思路与要求,对实际工作有一定的参考价值.