The evolution of the Huangling uplift and its control on the accumulation and preservation of shale gas

There are plenty of Sinian and Cambrian potential shale gas resources in South China, which is characterized by high thermal evolution degrees, poor drilling performances and only occurs in local areas. Taking the principle “high to find low” is the key issue to achieving a breakthrough in older shale. China Geological Survey drilled in the periphery of the Proterozoic basement, i.e. the Huangling anticline, in the western Hubei, and Hannan paleocontinent in the southern Shanxi. It received high-quality gas-bearing shale with relatively low Ro in the in Lower Cambrian Niutitang formation and Sinian Doushantuo formation. Based on geological conditions of shale gas reservoirs in the Huangling anticline, this paper puts forward the new model named “Control over reservoirs by periphery of basement” about shale gas accumulation, suggesting that the shale deposited in a deepwater continental shelf in the periphery of the basement is characterized by shallow burial, a short burial time, stable tectonics, relatively low thermal evolution degrees, and shale gas reservoirs in a good condition. The shale of the Sinian-Cambrian strata deposited in deepwater continental shelves in the periphery of Chuanzhong paleo-uplift in Sichuan, Hannan paleocontinent in the southern Shanxi, Huangling anticline in western Hubei and Jiangnang-Xuefeng paleo-uplift in Hunan and Guizhou province have good shale gas exploration potential.     

蚌埠市地理信息系统应用探讨

阐述了GIS系统的设计原则,建设方案,揭示了GIS系统功能模块的效能,利用Map控件建立信息管理系统,最后探讨了GIS系统在应用领域的发展前景。     

GPRS在测量GPS RTK中的应用

在测量技术高速发展的今天,GPS已经成为大众测量工具,GPRS网络数据传输方式在GPS测量中的应用,使得GPS在测量中,基准站与流动站的连接速度更快、基准站与流动站的作业距离更远、基准站与流动站之间的数据通讯更加稳定,测量精度更加精确等优势。     

地下水中氟形成的控制因素及其分布规律

本文研究了地下水中氟元素形成的主要控制因素及其分布规律。结果表明，地下水氟的形成与断裂构造，地下水温度、气候条件、含水介质及其上覆土层中的氟含量，地下水的酸碱度与径流条件有密切的关系。深成断裂脉状地下水和萤石矿区的地下水氟含量高，不有作为生活饮用水源； 而浅层的地下水氟含量较低，大多数仍作为生活饮用水源。     

A hierarchical real-time control architecture for a semi-autonomous underwater vehicle

This paper describes a real-time control architecture for Dual Use Semi-Autonomous Underwater Vehicle (DUSAUV), which has been developed at Korea Research Institute of Ships and Ocean Engineering (KRISO) for being a test-bed of development of underwater navigation and manipulator technologies. DUSAUV has three built-in computers, seven thrusters for six DOF motion control, one 4-function electric manipulator, one ballasting motor, built-in power source, and various sensors. A supervisor control system with GUI and a multi-purpose joystick is mounted on the surface vessel and communicates with vehicle through a fiber optic link. Furthermore, QNX, one of real-time operating system, is ported on the built-in control and navigation computers for real-time control purpose, while Microsoft OS product is ported in the supervisor computer for GUI programming convenience. A hierarchical control architecture, which consists of application layer, real-time layer and physical layer, has been developed for efficient control system of above complex underwater robotic system. The experimental results with implementation of the layered control architecture for various motion control of DUSAUV in an ocean engineering basin of KRISO is also presented.     

云南广南县老寨湾金矿地质特征及找矿标志

广南县老寨湾金矿位于滇、黔、桂“金三角”重要成矿区带上,金矿体矿体呈似层状赋存于断层构造破碎带或层间构造破碎带中,构造控矿明显。矿体围岩均为下泥盆统坡松冲组第一段(D1ps1)硅化石英砂岩;矿床成因属中-低温热液叠加改造型金矿床,断层构造、硅化等矿化蚀变及地球化学异常是重要的找矿标志。     

VIV and galloping of single circular cylinder with surface roughness at 3.0×10≤Re≤1.2×10

Passive Turbulence Control (PTC) in the form of selectively distributed surface roughness is used to alter Flow Induced Motion (FIM) of a circular cylinder in a steady flow. The objective is to enhance FIM's synchronization range and amplitude, thus maximizing conversion of hydrokinetic energy into mechanical energy by oscillator in vortex-induced vibration and/or galloping. Through additional viscous damping, mechanical energy is converted to electrical harnessing clean and renewable energy from ocean/river currents. High Reynolds numbers (Re) are required to reach the high-lift TrSL3 (Transition-Shear-Layer-3) flow regime. PTC trips flow separation and energizes the boundary layer, thus inducing higher vorticity and consequently lift. Roughness location, surface coverage, and size are studied using systematic model tests with broad-field laser visualization at 3.0×10⁴<Re<1.2×10⁵ in the low-turbulence free-surface water-channel of the Marine Renewable Energy Laboratory of the University of Michigan. Test results show that 16° roughness coverage is effective in the range (10°-80°) inducing reduced vortex-induced vibration (VIV), enhanced VIV, or galloping. Range of synchronization may increase or decrease, galloping amplitude of oscillation reaches three diameters; wake structures change dramatically reaching up to ten vortices per cycle. Conversion of hydrokinetic energy to mechanical is enhanced strongly with proper PTC.     

张掖市湿地资源调查与保护对策

在对张掖市湿地资源进行全面调查的基础上,分析了湿地资源的特点以及存在的问题,并提出提高全社会湿地保护意识,加强湿地保护法规体系建设,逐步完善湿地自然保护和监测体系,强化湿地保护管理科技支撑,建立健全各级湿地保护管理机构,坚持保护与开发协调发展等对策。     

北京市基础测绘技术规程的探讨

分析了规程与现行相关法律、法规和标准的关系,探讨了北京市基础测绘技术规程的内容,介绍了其创新点和应用情况。通过分析介绍,该地方标准统一了北京市基础测绘的技术标准,规范了基础测绘成果,有利于实现测绘信息资源的共享和有效利用。     

年度土地变更调查新机制之探索

介绍了武汉市土地变更调查的历史沿革情况,通过对新旧机制的对比以及分析新机制存在的问题,从而对变更调查新机制进行了探索研究。