依据剖面资料求解断层的水平位移     

安晓文  李世成  周瑞琦  俞维贤  陈宇军 《地震研究》2002,25(4):369-373

提出依据开挖剖面中的楔形体在受到断层作用时其厚度的变化量求解断层水平位移的方法。分析表明断层水平位移量S与楔形体在断层两侧厚度变化量Δh满足关系式S＝Δh/ρsinβ。式中ρ为楔形体在断层走向上的尖灭系数，β为断层的倾角，该关系式不仅能满足纯走滑运动的断层，而且也满足一般斜滑断层，同时提出了在剖面上判断断层水平运动性质的方法。  相似文献   

A discussion on the records of water level ‘precursors’ in Well Shuozhou, Shanxi Province     

Che Yong-tai  Yu Jin-zi  Zhang Shu-liang  Fan Xue-fang  Guo Jun-jie  Zhang Tian-yuan  Yang Jin-lan 《地震学报(英文版)》2002,15(2):226-233

A lot of slow fluctuations of water level have been observed in the original recording maps of subsurface fluid in Well Shuozhou, Shanxi Province. Some typical recording maps of the “precursors” are introduced in the paper and the features of the “precursors” recorded by the well are analyzed. The results show that 38% strong earthquakes possess this kind of record, which has a fluctuation period arranging from several to tens of minutes and appear mostly two days before the earthquakes. Moreover, the mechanism, transmission and responding conditions of well water level are discussed, as well as the scientific meaning and practical value of the “precursor” of the well water level in earthquake predictions. Foundation item: State Natural Science Foundation of China (19973011).  相似文献   

大姚地热动态特征分析   总被引：3，自引：1，他引：3  

毛德培  王树明  胡智文  万登堡  石绍先 《地震研究》2002,25(1):42-47

通过大姚高精度水温观测井水地质、井孔条件的分析，震例观测资料、实验观测数据的处理，以及井水水质分析结果，表明大姚水温周期性变化的突出位置是井深75m左右，根本原因是该地层石膏脉稳定释热，含水层热水与井内冷水混合过程中，在通道内形成钙盐类沉淀物（如CaSO4CaCO3），堵塞对流通道，含水层内外压差突破被阻塞通道，热水反复侵入井内，便形成水温周期性变化。地震的孕育、发生和调整过程，由于应力场作用，产生附加地热场，水温基值发生变化，周期畸变或消失，这种附加地热动态是可以恢复的。所以认为大姚地热动态是井区特殊地层地热信息的反映。  相似文献   

地球物理技术在我国考古和文物保护工作中的应用   总被引：3，自引：6，他引：3  

钟世航 《地球物理学进展》2002,17(3):498-506

20世纪80年代以来，我国考古及文物保护工作者和地球物理工作者越来越认识到地球物理技术在考古和方物保护方面可以发挥作用，在古幕探查、大型古建筑地下遗存现状、古遗迹断代等方面，地球物理技术都找到了发挥作用的机会，本文通过地球物理技术在云冈石窟、龙门石窟、克孜尔石窟、北京故宫紫禁城、嵩岳寺塔、古泗州城遗址、风阳明中都等的物理探查实例，以及查找古幕、古遗迹断代等方面的工作，介绍了我国在考古和文物保护领域应用地球物理技术的进展，并指出了物探在用于考古和文保时的特点和展望。  相似文献   

结合农业科技园建设观光农园的探讨——以潮州鹤陇山农业科技园与观光农园的规划设计为例   总被引：2，自引：0，他引：2  

徐君亮  江璐明 《热带地理》2002,22(3):236-240

广东省经济和旅游业发展位于全国榜首，人多地少全国最为突出，但乡村旅游建设相对滞后，文中通过潮州市郊鹤陇山农业科技园与观光农园规划设计，论述了发展高新技术农业是新世纪广东农业必由之路，提出结合农业科技园建设，叠加农业观光园，把生态农业建设与旅游文化结合起来，是广东乡村旅游发展的主要途径。  相似文献   

洪水演进三维模拟仿真系统可视化研究   总被引：14，自引：0，他引：14  

袁艳斌  袁晓辉  张勇传  刘吉平  侯国祥 《山地学报》2002,20(1):103-107

洪水演进仿真系统的研制，是实施“数字流域”工程的重要组成部分；结合洪水演进可视化目标的分析，基于Visual C 系统开发平台，融GIS技术和Opengl开发技术，采用三角形逼近、光滑处理和加入法向量以控制光照的方式，实现了流域地形及河床的三维可视化仿真；应用广度优先搜索算法确定了运动水体与流域河床形态的自适应与自相依的关系，使流域洪水演进模拟具有真实自然的可视化效果。所研制的系统雏形，可有效的模拟流域洪水的三维演进过程；  相似文献   

History and necessity: the evolution of soil conservation technology in a Jamaican farming system     

Rebecca J. Kent 《The Geographical journal》2002,168(1):48-56

The soil conservation campaigns that have been a prominent feature of Jamaican agricultural policy since the 1950s are frequently presented as having failed to ameliorate the problem of soil erosion in hillside agriculture. A case study of a small farming community in the Blue Mountains explores the development of the soil conservation practices currently employed by farmers. The use of trash barriers in carrot farming is described and the origins of this technology and its subsequent adaptation are considered. The study concludes that extension interventions and government policy have influenced the development of current soil conservation practices; practices which have their roots in indigenous techniques. Other factors such as the adaptation of trash barriers to suit local conditions and their importance in soil fertility management also play a role in their widespread use in the study area. The study demonstrates that to understand the process of technical change in farming communities, it is necessary to consider a range of factors, external and internal, technical and social, that have over time influenced farmers' decision making.  相似文献   

Religion and technology: refiguring place, space, identity and community   总被引：1，自引：0，他引：1  

Lily Kong 《Area》2002,33(4):404-413

This paper reviews the literature on the religion–technology nexus, drawing up a research agenda and offering preliminary empirical insights. First, I stress the need to explore the new politics of space as a consequence of technological development, emphasizing questions about the role of religion in effecting a form of religious (neo)imperialism, and uneven access to techno-religious spaces. Second, I highlight the need to examine the politics of identity and community, since cyberspace is not an isotropic surface. Third, I underscore the need to engage with questions about the poetics of religious community as social relations become mediated by technology. Finally, I focus on questions about the poetics of place, particularly the technological mediation of rituals.  相似文献   

大港油田板深22井油气地球化学异常特征     

姚锦其  王国华  付瑞忠 《矿产与地质》2003,17(4):540-544

根据板深22井中不同地球化学指标的背景含量和异常特征，重点探索和总结了不同油气层的化探指纹指标，并根据地表指纹指标的异常组合、配套关系及异常特征，对油气层的埋深进行了初步预测，为今后该地区地表开展预测油气藏埋深的工作提供了一定的地球化学依据。  相似文献   

罕见矿物--六方球方解石的发现及特征     

彭苏萍  丁述理  王贤君  刘钦甫 《矿物学报》2003,23(1):45-50

大庆油田部分三元复合驱抽油井结垢现象比较严重。井中结垢损害抽油设备，增加了生产成本。通过运用XRD，IR，SEM和化学分析手段对抽油井垢的研究发现，垢的主要化学成分为CaO和SiO2，其含量分别为67％和28％，油井垢中的主要矿物成分是罕见矿物——六方球方解石。六方球方解石呈微晶状(1—10μm)，并常常以微晶聚集的球粒状出现，同时伴生有无定形SiO2。呈游离态的SiO2和有机质对于六方球方解石的形成起到了重要作用。  相似文献