内核地球模型的形变场和地球参考系     

张捍卫  郑勇  刘长建 《测绘学院学报》1999,(2)

讨论了内核地球模型的形变场（ 位移、速度） 和地球参考系的确立, 为内核地球动力学的研究提供了依据。  相似文献   

相对湿度对大气气溶胶粒子短波辐射特性的影响   总被引：25，自引：2，他引：23  

杨军  李子华  黄世鸿 《大气科学》1999,23(2):239-247

利用Mie散射原理和重庆实测气溶胶资料,详细计算了边界层内单个气溶胶粒子的光学特性参量,气溶胶粒子群体的散射、吸收、消光系数及不对称因子、散射比、光学厚度;进而采用二流近似和累加法计算了边界层内太阳短波辐射增温率。目的在于研究相对湿度对以上各特性参量的影响。结果表明,相对湿度在65%～95%之间变化时,对气溶胶粒子群体光学特性参数和太阳增温率的影响在量级上可与气溶胶粒子浓度成倍变化的影响相比拟。  相似文献   

超大型铜镍硫化物矿床研究进展   总被引：4，自引：0，他引：4  

范育新  张铭杰 《甘肃地质》1999,8(2):47-52

超大型铜镍硫化物矿床不仅赋存有巨大的铂族贵金属资源,而且赋存有非常重要的深源信息,对其成矿理论的多学科综合研究具有重要的理论和实际意义。通过对超大型铜镍硫化物矿床的产出特征、时空分布、构造环境、控矿条件、母岩浆系列、成矿机理等研究现状的总结,认为以下几方面研究具有较大潜力：（１）矿床成因;（２）通过构造—流体—岩浆—成矿动力学综合研究,揭示成矿机制与全球变化的内在关系;（３）元古宙板块构造演化与超大型矿床形成的关系。  相似文献   

关于提高铜陵地区地质找矿的几点认识   总被引：1，自引：0，他引：1  

夏元法 《安徽地质》1999,(2)

铜陵地区虽然矿产资源丰富,成矿条件良好,但目前找矿的难度越来越大。笔者认为,要提高铜陵地区地质找矿的效果,就要根据本区的成矿规律,开展综合地质找矿,要进一步研究各矿田（床）的地质特征,继续提高铜陵地区的地质研究程度,充分运用现代成矿学新理论指导找矿,并大胆的用探矿工程加以验证。  相似文献   

A political-cultural map of Europe. Family structures and the origins of differences between national political cultures in the European Union     

Virginie Mamadouh 《GeoJournal》1999,47(3):477-486

Differences between the national political cultures of the European states are puzzling. They are too often taken for granted or treated as an elusive explanation for residual differences that can not be accounted for in comparative politics. Here they are put at the core of a comparative analysis. This article explores the origins of differences between national political cultures. It deals with national political cultures from the perspective of Cultural Theory or grid-group analysis. A national political culture is conceived as a ‘conversation’ between subcultures associated to national political institutions and practices (and not as an aggregated pattern of individual orientations toward political objects). National political cultures can be characterised on the basis of ideal typical patterns of relations between the basic cultures or rationalities distinguished by Cultural Theory. After an assessment of the differences between the national political cultures of the Member States of the European Union, the paper considers traditional family structures as possible sources of differentiation, elaborating upon the work of the French political historian Emmanuel Todd who has documented the correspondence between the geography of traditional family structures and the geography of ideologies in Europe. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

A watershed on the Rhine: Changing approaches to international environmental cooperation     

Marco Verweij 《GeoJournal》1999,47(3):453-461

Since the 1950s, the governments of the riparian countries of the Rhine have attempted to protect the ecosystems of the river basin through international cooperation. Before 1987, their relations were unproductive and antagonistic. International programs for the protection of Rhine were far less effective than domestic policies. From 1987 onwards, international cooperation on the protection of the Rhine has been exemplary, and has led the way in domestic and international water protection policies. Many existing frameworks of international relations are not able to offer an adequate account of this wholesale change. In this article, an attempt is undertaken with the help of grid-group theory. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

固体矿产钻探技术的现状和展望   总被引：1，自引：0，他引：1       下载免费PDF全文

刘志方 《探矿工程》1999,(1):12-15

分析了国际钻探市场现状以及固体矿产钻探技术的进展,归纳总结了近１０年来我国固体矿产钻探技术的主要进展,并对发展我国固体太科钻探技术提出了建议。  相似文献   

水压致裂法地应力测量若干问题的探讨   总被引：4，自引：0，他引：4  

刘允芳  刘元坤 《地震研究》1999,22(3):265-272

在深层地应力测量中,水压致裂法是最有效的测量方法。本探讨了该方法的几个关键性问题,例如压裂特征参数的取值,三维地应力测量,压裂缝的方向,破裂准则和钻孔轴向秒是主应力的一个方向等问题。  相似文献   

Analysis of reservoir water quality using fuzzy synthetic evaluation   总被引：12，自引：0，他引：12  

R.-S. Lu  S.-L. Lo  J.-Y. Hu 《Stochastic Environmental Research and Risk Assessment (SERRA)》1999,13(5):327-336

A general methodology for fuzzy synthetic evaluation is developed and illustrated with a case study of trophic status assessment for Fei-Tsui Reservoir in Taiwan. The historical data base was collected from the management agency of Fei-Tsui Reservoir from 1987 to 1996. In fuzzy synthetic evaluation, the classification is determined by a matrix operation of the weighted vector with the fuzzy evaluation matrix. After all individual membership functions of evaluated factors have been determined, the fuzzy evaluation matrix can be established. The weighted vector is determined by the analytic hierarchy process method (AHP). The results of this investigation show that the long-term change of water quality and the overturn phenomena cannot be observed with the Carlson index from 1987 to 1992 but is expressed by fuzzy synthetic evaluation. Fuzzy synthetic evaluation is better suited than the Carlson index to rating the trophic status of self-sustaining lakes. Interpretation of the results can provide valuable information to decision makers and aid reservoir management.  相似文献   

嵌岩桩理论研究和设计中的几个问题   总被引：27，自引：0，他引：27  

刘树亚  刘祖德 《岩土力学》1999,20(4):86-92

明确嵌岩桩的定义和分类,对嵌岩桩的承载机理、临界嵌入深度、设计理论和数值模拟方法等问题进行讨论,并对未来的工作进行论述。  相似文献