地震力作用下海洋平台的可靠性研究   总被引：1，自引：0，他引：1  

刘振杰  吴海欣  杨刚  景悦 《地震工程与工程振动》1998,18(4):48-53

本文分析了在地震力作用下海洋平台的受力情况,文中运用概率论原理,建立了海洋平台在地震力作用下的可靠性分析方法。  相似文献   

A real time processing system of seismic waves using personal computers — Function and characteristics     

Jun Fan  Tian-Chang Chen  Wei-Bin Han  Jian Zeng  Si-Hua Zheng  Akira Hasegawa  Shigeki Horiuchi 《地震学报(英文版)》1998,11(3):375-379

Conclusions The real-time processing system of CTSN performs following: A/D conversion; automatic event detection; event data saving; automatic measure of P and S arrivals; event location and print out the calculated results. It is corrected at ny moment by using the off-line system. Since December 1993, this system has been operating normally in the CTSN. More than 4 000 earthquakes have been recorded in the system. It has high accuracy in automatic picking P and S arrivals. The location of the earthquakes determined by on-line system are close to those given in published catalogues which are determined by manual procedure. This system can finish locate event in three minutes. It also gives satisfactory epicenter locations for distant events by inputting manually S arrivals in the off-line system. The operation of this system had brought the technical superiority of the CTSN. It not only reduces the labor intensity and simplifies the working procedure, but also makes our research facility into the superior ranks in this field of our country. In conclusion, the real-time processing system of seismic wave provides technical support for the daily requirements of monitoring seismic activity as well as a lot of digital waveform data used seismic research in Sichuan area. This subject is sponsored by the Scientific and Technical Committee of Sichuan Province.  相似文献   

Bioistratigraphical and sedimentological study of Upper Senonian–Lower Eocene sediments of Tripolitza Platform in central Crete (Greece)     

A. Zambetakis-Lekkas  F. Pomoni-Papaioannou  A. Alexopoulos 《Cretaceous Research》1998,19(6):715-732

The stratigraphic and palaeoenvironmental implications of a section in the Upper Senonian to Lower Eocene carbonates of the Tripolitza Platform in central Crete are discussed in this paper. The lower part (upper Campanian–lower Maastrichtian) of the succession consists of about 75 m of thickly bedded, light to dark grey limestones, dolomitic limestones and dolomites that were deposited on an inner carbonate platform. It is characterized by stratified bioclastic rudist facies (shelly limestone) associated with foraminifera and especially with species of the Rhapydioninidae family. These are overlain by 35 m of crystalline light grey dolomites that were deposited on a very restricted internal platform, characterized by intertidal-supratidal facies. The overlying 75-m-thick light grey dolomitic limestones and dolomites are characterized by the presence ofRhapydionina liburnicaStache, and in the uppermost part byNeobalkhania bignotiCherchi, Radoicic & Schroeder, dating it as Late Maastrichtian. The facies, cryptalgal laminites with fenestrae of varying dimensions, suggest relatively extensive subaerial exposure. Possible pedogenic textures are common in this sequence and especially in the uppermost part, which coincides with the K/T boundary. The presence ofPseudonummoloculina heimi(Bonet) at two levels in the Maastrichtian succession suggests transportation of Middle-Late Cenomanian sediments from emergent blocks of the platform during this period. A gap is suspected, for regional stratigraphic reasons, between this horizon and the next which containsSpirolinasp. and “Pseudochrysalidina” sp., dating it as Early-Middle Eocene.  相似文献   

华北地台北缘及北邻地区铜、铅、锌、锡矿床流体包裹体研究   总被引：3，自引：1，他引：2  

王莉娟 《矿床地质》1998,17(3):256-263

在对华北地台北缘及北邻地区 5 2个铜、铅、锌、锡矿床流体包裹体研究的基础上 ,概括总结出岩控型、层控型和混控型三大类型及多个亚类型矿床的主要成矿物理化学条件 ,建立了各类型矿床矿物流体包裹体成矿模式 ,并用以找矿。  相似文献   

水下爆破技术在马家泵站工程中的应用     

代树林  菅志军  王智明 《地质与勘探》1998,(4)

介绍了马家泵站工程水下爆破参数的设计和施工工艺,以及所取得的经验和体会。  相似文献   

隐伏地质异常地表间接显示的物理模拟实验     

徐进 《地球科学》1998,23(2):133-136

用物理模拟方法研究隐伏地质异常地表间接显示机理,探讨隐伏线性构造在挤压条件下的表面特征,在后期构造作用下,表面线性体破裂变形模式包含了 隐伏地质异常的成因信息,可以通过地和学分析方法提取和识别。  相似文献   

女姑山跨海桥基施工用钢平台设计   总被引：1，自引：0，他引：1       下载免费PDF全文

顾元威  于吉太 《探矿工程》1998,(1):33-35

结合青岛女姑山跨海桥基工程实践,介绍海滨钢平台设计的基本程序与方法。  相似文献   

华北地台南缘下古生界天然气勘探有利区域探讨     

曹建康 《矿物岩石》1998,18(3):34-38

在华北板块上,陕甘宁盆地近年来发现了世界级大型气田,为同一地台的其他地区天然气勘探带来了光明和希望。华北地台南缘下古生界经多年的油气勘探证明,位于河南境内的太康隆起具有多套生油层系及一定的生成能力,是油气勘探的主要区域。该储集岩的控制因素较多,主要因素有：潮坪相具有形成良好储层的物质条件;粉晶白云岩和含膏白云岩是孔隙发育的最有利岩石类型;构造运动是油气保存的重要条件。综合分析认为,太康隆起下古生界天然气最有利的储集层段：在纵向上为峰峰组和上马家沟组Ⅲ段,横向分布于郑州—开封以南,郑州—新郑以东,范村—孙营—白潭一线以西区域。  相似文献   

场分立体显示系统的硬件实现     

洪琨彬  李惠超  韦穗  周敏彤 《武汉大学学报(信息科学版)》1998,(3)

根据双摄像机的几何模型,提出了一套双眼立体显示系统的设计方案——场分立体视觉系统。硬件采用流行的ＰＣＩ总线与计算机相连,能够实时获取２个摄像机图像,并能按双眼成像要求的频率工作,产生一个增强的三维世界。  相似文献   

华北地台某些地区变质岩中的钙质角闪石   总被引：1，自引：0，他引：1  

Jin Shiqin 《吉林大学学报(地球科学版)》1989,(2)

本文研究了华北地台某些地区变质岩中的130个钙质角闪石的化学成分、多色性等特征及其控制因素,认为角闪石的含铁度主要决定于寄主岩石的〈FeO〉/MgO比值,而Ti、Al~(IV)、(Na+K)含量主要决定于变质条件,Ng方向多色性主要与Ti的含量有关。  相似文献