层式滤波隔震垫     

娄霓  靳树才 《高原地震》2007,19(4):55-60

根据震相图展示的地震波运动规律,利用滚动摩擦阻力只相当滑动摩擦阻力1／40～1／60的力学效应,将轴承钢球呈层状重叠组合成隔震垫,可获得重复滤波效果,能高效降低地震对房屋建筑的作用力,达到提高地震安全度,降低建筑成本、节约建筑资源的目的。  相似文献   

ON LONG-WAVES BREAKING Ⅱ.IN A HALF INFINITE CHANNEL WITH BOTTOM SLOPE     

田纪伟  楼顺里  胡敦欣  李鸿雁 《中国海洋湖沼学报》1995,(3)

The propagation of long-waves, such as tidal waves from the coastal oceam into shallow estuarine waters,often produces asymmetries of veolcity and water level in time series resulting in long-wave breaking.Tian (1994) studied the mechanism of long-wave breaking in an infinite channel with constant depth,considering nth power bottom friction. This study is for the case of a half infinite channel with bottomslope, taking linear bottom friction into account. The wave breaking time and wave breaking location areestimated and the criteria for long-wave breaking in this particular case are obtained. The results obtainedcan also be e asily applied to the case considering wind stress.  相似文献   

热液铀矿床还原型“成矿激发因素”的特征及其找矿意义     

刘广庆  楼鲜荭  李振球 《华东地质学院学报》2008,31(3):217-222

对还原型"激发成矿"因素进行了深入的探讨,认为还原型"成矿激发因素"热液铀矿床是由成矿溶液流到成矿空间,Eh骤然显著降低,达到矿质沉淀所需的还原条件引起铀成矿.热液铀矿床还原型"成矿激发因素", 按还原剂的来源分为两个亚类:内在还原亚类和环境还原亚类.重点阐述还原型"成矿激发因素"的分类、特征、形成条件、代表性的矿床及找矿意义.为衡量环境(围岩)还原能力,提出了环境还原指数E=(R+S+C)/(氧当量数+氟、氯当量数),来表示环境(围岩)还原能力与铀成矿的关系.  相似文献   

中国铁矿床品位-吨位模型   总被引：1，自引：0，他引：1  

阴江宁  肖克炎  邹伟  丁建华  娄德波 《矿床地质》2008,27(6):782-790

文章以2005年国家有关部门公布的铁矿储量数据为依据,在拥有翔实和权威的铁矿数据材料的基础上,经过分析整理和统计计算,以铁矿的6种矿床类型(沉积变质型、沉积型、矽卡岩型、岩浆岩型、火山岩型和风化型)为划分依据,建立了中国铁矿及其伴生矿种的品位和吨位模型,并对其品位-吨位联合分布的模型进行了研究。通过研究得出结论,中国铁矿的资源量不服从正态分布,经过对数变换后服从正态分布,品位除了矽卡岩之外都直接服从正态分布。由于铁矿的品位和吨位之间相关性较差,因而不具备分形特征。最后通过建立吨位和品位的直方图来构造正态分布函数,从而实现累计概率曲线的拟合。在取得了远景区的矿床类型、矿床数分布以及矿床的品位和吨位的累计概率曲线后,可以使用计算机通过蒙特卡洛模拟的方法来实现远景区资源量的预测和模拟。  相似文献   

Distribution of the Ordovician Fluid in the Tahe Oilfield and Dynamic Response of Cave System S48 to Exploitation   总被引：2，自引：1，他引：1  

LOU Zhanghu  ZHU Rong  YUN Lu  RAN Qihu  SU Danyang  LI Mei 《《地质学报》英文版》2008,82(3):487-498

The Tahe Oilfield is a complex petroleum reservoir of Ordovician carbonate formation and made up of spatially overlapping fracture-cavity units. The oilfield is controlled by a cave system resulting from structure-karst cyclic sedimentation. Due to significant heterogeneity of the reservoir, the distribution of oil and water is complicated. Horizontally, a fresh water zone due to meteoric water can be found in the north part of the Akekule uplift. A marginal freshening zone caused by water released from mudstone compaction is found at the bottom of the southern slope. Located in a crossformational flow discharge zone caused by centripetal and the centrifugal flows, the main part of the Tahe Oilfield, featuring high salinity and concentrations of CI^- and K^＋＋Na^＋, is favorable for accumulation of hydrocarbon. Three types of formation water in the Tahe Ordovician reservoir are identified： （1） residual water at the bottom of the cave after oil and gas displacement, （2） residual water in fractures/pores around the cave after oil and gas displacement, and （3） interlayer water below reservoirs. The cave system is the main reservoir space, which consists of the main cave, branch caves and depressions between caves. Taking Cave System S48 in the Ordovician reservoir as an example, the paper analyzes the fluid distribution and exploitation performance in the cave system. Owing to evaporation of groundwater during cross-formational flow, the central part of the main cave, where oil layers are thick and there is a high degree of displacement, is characterized by high salinity and Br^- concentration. With high potential and a long stable production period, most wells in the central part of the main cave have a long water-free oil production period. Even after water breakthrough, the water content has a slow or stepwise increase and the hydrochemistral characteristics of the produced water in the central part of the main cave are uniform. From the center to the edge of the main cave, displacement and enri  相似文献   

Distribution of the Ordovician Fluid in the Tahe Oilfield and Dynamic Response of Cave System $48 to Exploitation     

LOU Zhanghua  ZHU Rong  YUN Lu  RAN Qihua  SU Danyang  LI Mei 《《地质学报》英文版》2008,82(3)

The Tahe Oilfield is a complex petroleum reservoir of Ordovician carbonate formation and made up of spatially overlapping fracture-cavity units. The oilfield is controlled by a cave system resulting from structure-karst cyclic sedimentation. Due to significant heterogeneity of the reservoir, the distribution of oil and water is complicated. Horizontally, a fresh water zone due to meteoric water can be found in the north part of the Akekule uplift. A marginal freshening zone caused by water released from mudstone compaction is found at the bottom of the southern slope. Located in a cross- formationai flow discharge zone caused by centripetal and the centrifugal fows, the main part of the Tahe Oilfield, featuring high salinity and concentrations of CI- and K Na , is favorable for accumulation of hydrocarbon. Three types of formation water in the Tahe Ordovician reservoir are identified: (1) residual water at the bottom of the cave after oil and gas displacement, (2) residual water in fractures/pores around the cave after oil and gas displacement, and (3) interlayer water below reservoirs. The cave system is the main reservoir space, which consists of the main cave, branch caves and depressions between caves. Taking Cave System $48 in the Ordovician reservoir as an example, the paper analyzes the fluid distribution and exploitation performance in the cave system. Owing to evaporation of groundwater during cross-formational flow, the central part of the main cave, where oil layers are thick and there is a high degree of displacement, is characterized by high salinity and Brconcentration. With high potential and a long stable production period, most wells in the central part of the main cave have a long water-free oil production period. Even after water breakthrough, the water content has a slow or stepwise increase and the hydrochemistral characteristics of the produced water in the central part of the main cave are uniform. From the center to the edge of the main cave, displacement and enrichment of oil/gas become weaker, residual water increases, and the salinity and concentration of Br- decrease. At the edge of the main cave, although the wells have a high deliverability at the beginning with a short stable production period and water-free production period. After water breakthrough, the pressure and deliverability drop quickly, and the water content rises quickly. The hydrochemistrai characteristics of the produced water are relatively uniform. Wells in the branch caves have a relatively low deliverability at the beginning, with a short stable production period. Water breakthrough appears quickly and then the pressure and deliverability drop quickly. The salinity and concentrations of CI-and K Na are usually fluctuant or descend slowly in the produced water. Wells in low areas of ancient karst have a low deliverability and a short stable production period. The yield drops quickly and the water content is high, while the characteristics of the produced water may vary significantly well to well. The salinity and concentrations of CI- and K, Na in the produced water are usually fluctuant with a precipitous decline.  相似文献   

云南省边境地区州市旅游竞争力差异与整合研究     

郭向阳  明庆忠  穆学青  娄思元  王娟  吴建丽 《世界地理研究》2017,(5):147-156

云南作为我国的旅游大省,其州市旅游竞争力水平对区域旅游业的生存和发展至关重要。基于旅游现状竞争力、旅游基础环境竞争力和旅游潜在竞争力三大维度构建了旅游竞争力量化测评指标体系,运用因子分析法对云南8个边境州市旅游竞争力水平层级进行了量化测评。研究表明:(1)云南边境地区8州市旅游发展竞争力层级分为较强旅游竞争力区、一般旅游竞争力区和较弱旅游发展竞争力区三种类型;红河、临沧属于较强旅游竞争力区,西双版纳、德宏、普洱属于一般旅游竞争力区,文山、保山、怒江属于较弱旅游发展竞争力区;(2)在空间布局形态方面,较强旅游竞争力发展州市呈现"分散状"布局,主要集中于滇南地区,其余非较强旅游竞争力区州市呈现"趋同俱乐部现象"空间布局。整体上旅游竞争力水平层级形成了以滇南地区为核心向周边州市等外缘区域发展的"核心—边缘"式空间发展格局;(3)边境各州市旅游资源呈现区块聚焦性,旅游形象和客源市场定位仍存在雷同现象,且边境各州市旅游业发展水平极化效应明显。为此提出了旅游产品及资源、旅游市场、旅游空间及旅游线路整合和完善旅游管理机制等应对策略。  相似文献   

GGT综合地球物理资料人机交互解释系统的初步研究     

高锐  贺知捷  潘喻  秦爽  冯晓枫  王学颖  褚德志  王华啸  李莉  余钦范  楼海  吴至善 《地球学报》1990,11(2):268-281

为提高GGT解释性剖面的质量，构制地球物理解释模型，设计和研制了人机交互解释系统。整套系统即具有单一方法相对独立的快速求解任意复杂断面的人机交互功能，又可通过模型转换和参数的替换方式实现多方法的联合解释。系统设计以二维非均质任意形体的计算方法和物性参数间关系的研究为物理基础，引进鼠标器工作方式和调用DBASE图形软件包，增强了系统的图形编辑功能。系统的菜单式结构和用DBASE Ⅲ语写、串写的各子程序模块，不仅为采用新型数据库软件管理和查询物理场与模型数据开辟了较好的软件环境，而且使整个系统的软件结构灵活、清晰，便于改进、扩充。文章结尾以3个实例，介绍了人机交互系统在GGT地球物理解释中的应用。  相似文献   

粤东北仁差盆地早侏罗世花岗岩基底LA-ICP-MS锆石U-Pb年龄及其地质意义     

汤谨晖  娄峰  甘炳艳  黄文生 《地质通报》2016,35(6):989-997

钻探勘查揭露表明,粤东北仁差盆地基底主要由古生代变质岩和文象花岗岩组成。为进一步查明其基底岩体形成的时代,提高对该地区地质演化的认识,对盆地内2个勘查钻孔内的文象花岗岩岩心取样,进行LA-ICP-MS锆石U-Pb同位素定年,测得谐和年龄为179±1Ma和186Ma。此结果表明,仁差盆地基底文象花岗岩的形成时代为早侏罗世晚期,即其为燕山期第一幕岩浆活动的产物。此年龄不仅加深了对仁差盆地形成演化的认识,也为粤东北地区早侏罗世时期缺乏岩浆岩活动的报道提供了新的年代学资料。  相似文献   

安徽巢湖—肥东地区沉积变质型铁矿带的地质特征及找矿潜力分析     

娄清  尚世贵  刘雨  李三 《安徽地质》2016,26(4):246-250

安徽巢湖—肥东一带的铁矿床为中型规模的BIF铁矿床。本文基于已有勘查研究成果,总结归纳矿床地质特征,探讨矿床成因并进行找矿潜力分析。  相似文献