A study on the geochemical characteristics of natural gas and gas sources in the Bozhong sag     

WEN Zhigang TANG Youjun LI Fuping CHEN Dan MI Lijun XUE Yongan 《中国地球化学学报》2007,26(4):402-406

Natural gas is composed largely of hydrocarbon gas, especially wet gas in the Bozhong sag. The carbon isotopic composition shows that the gas is of organic origin. The carbon isotopic values of ethane indicate that the natural gas is dominated by mixed gas with minor coal-generated gas and oil-type gas. A gas-source correlation study showed that the source rocks of natural gas are those of the Lower Dongying Formation, the Shahejie Formation and the pre-Tertiary. The natural gas is characterized by multi-source and continuous generation in the study area, indicating that gas exploration potential is good in the Bozhong sag.  相似文献   

非迭代大地测量导线     

Ozone  MI 李国忠 《武测译文》1995,(4):41-43

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EDM站微波路径曲率半径     

Ozon.  MI 徐绍铨 《武测译文》1993,(1):15-19

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关于圆形浅谷对Rayleigh波的反应的注记：分析方法     

Todo.  MI Lee  VW 《地震工程与工程振动》1990,10(1):21-24

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3D电子测距仪定位的非迭代解法     

Ozone  MI 邓健生 《测绘科技》1994,(1):49-56

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城市交通网络GIS数据模型研究进展与问题探讨     

黄晓文  李国忠  关铁英 《测绘与空间地理信息》2008,31(3)

交通是GIS技术最重要的应用领域之一,本文首先对城市交通网络空间数据模型进行了分类,然后介绍了近年来城市交通网络空间数据模型研究在导航数据库、时态数据处理、多模式交通网络表达等方面的主要进展。  相似文献   

Scientific management of Mediterranean coastal zone: a hybrid ocean forecasting system for oil spill and search and rescue operations     

Jordi A  Ferrer MI  Vizoso G  Orfila A  Basterretxea G  Casas B  Alvarez A  Roig D  Garau B  Martínez M  Fernández V  Fornés A  Ruiz M  Fornós JJ  Balaguer P  Duarte CM  Rodríguez I  Alvarez E  Onken R  Orfila P  Tintoré J 《Marine pollution bulletin》2006,53(5-7):361-368

The oil spill from Prestige tanker showed the importance of scientifically based protocols to minimize the impacts on the environment. In this work, we describe a new forecasting system to predict oil spill trajectories and their potential impacts on the coastal zone. The system is formed of three main interconnected modules that address different capabilities: (1) an operational circulation sub-system that includes nested models at different scales, data collection with near-real time assimilation, new tools for initialization or assimilation based on genetic algorithms and feature-oriented strategic sampling; (2) an oil spill coastal sub-system that allows simulation of the trajectories and fate of spilled oil together with evaluation of coastal zone vulnerability using environmental sensitivity indexes; (3) a risk management sub-system for decision support based on GIS technology. The system is applied to the Mediterranean Sea where surface currents are highly variable in space and time, and interactions between local, sub-basin and basin scale increase the non-linear interactions effects which need to be adequately resolved at each one of the intervening scales. Besides the Mediterranean Sea is a complex reduced scale ocean representing a real scientific and technological challenge for operational oceanography and particularly for oil spill response and search and rescue operations.  相似文献   

黑龙江省基础综合省情地理信息系统——构建有关问题的探讨     

李国忠  张宣 《测绘与空间地理信息》1999,(3)

本文通过对“黑龙江省综合省情地理信息系统”的介绍,对建立“黑龙江省综合省情地理信息系统”的过程、软件平台选取基础地理数据选择、统计数据录入、数据更新机制建立等问题进行了总结性的探讨,以期对今后的工作和同行们起到一些参考作用。  相似文献   

Distinct taxonomic and ecological functions of microbiome in sediments of different depth in Bohai Sea and Yellow Sea     

Siqi LI  Ye CHEN  Lun SONG  Tiezhu MI  Yu ZHEN  Zhigang YU 《海洋湖沼学报（英文）》2023,(5):1765-1780

Microorganisms in sediments are critical to marine ecosystems. The microbial communities in marine sediments of the Bohai Sea(BS) and Yellow Sea(YS), the eastern Chinese marginal seas, were uncovered in employing the metagenomic approach. In addition, the taxonomic and functional compositions of microbes were compared among various sediment core depths. Results showing the compositions, diversities, and functions of the microbial communities showed no significant variations with sea areas, and s...  相似文献   

Zircon U-Pb Chronology and Whole-rock Sr-Nd Isotope Compositions of Granite Porphyry in the Kaladaban Area of the Northern Altyn     

JIA Wenbin  LI Yongsheng  MI Kuifeng  YU Xiaofei 《《地质学报》英文版》2020,94(1):200-201

正Objective The Altyn Tagh marks the northern margin of the Qinghai-Tibet Plateau and lies between the Tarim block to the north and the Qaidam block,Qilian Orogen,and Kunlun orogenic belt to the south.The Altyn Tagh region contains ophiolite,high-to ultrahigh-pressure metamorphic rocks,and igneous rocks.Previous research has virified the occurrence of continental rifting,subduction,slab roll-back,and collision between the Tarim block and Proto-Tethys oceanic plate.Moreover,Kaladaban volcanic rocks are mainly distributed in the north Altyn region.Studies of the magmatic evolution of this region have proposed that Altyn oceanic plate was subducted during the Ordovician (Han et al.,2012;Wang et al.,2017).However,the specific timing and other  相似文献