Magnetic activity of the spotted dwarf AP149 in the α Persei open cluster

The simultaneous photometric and spectroscopic observations of the spotted G dwarf AP149 in the young open cluster α Persei are analyzed here.We reconstruct the observed light curves with a two-starspot model by means of a light curve modeling technique,and find that the active regions shift oppositely along longitude on a time scale of one day.Combining with the observational data obtained by other groups,we discuss the evolution of spotted regions in the photosphere,and find that its starspots evolve not ...     

Glacier Changes at Svartisen,Northern Norway,during the Last 125 Years:Influence of Climate and Other Factors

The two ice caps of Svartisen,at the latitude of the Arctic Circle in Norway,supply 60 glaciers,ranging in size from >50 to <1 km2.Until the last two decades of the 19th century,the glaciers remained close to their maximum recent(Little Ice Age) size.In response to the prevailing 20th century climate,they have become smaller,but the changes have varied between glaciers.Climatic factors have not been the sole control of the variations.The response times of small,steep glaciers are shorter than those of the l...     

Observed Glaciohydrological Changes in China's Typical Monsoonal Temperate Glacier Region since 1980s

Under the background of significant climate warming since the 1980s,the glaciers in China's monsoonal temperate glacier region respond to the warming intensely.Based on the glaciohy-drological observations at some typical glaciers from Mts.Yulong(玉龙) and Gongga(贡嘎) of Heng-duan(横断) Mountains Range in the southeastern Tibetan plateau,the glaciohydrological changes in the temperate glacier region since the 1980s were investigated.First,the glacier terminus exhibited an accelerating retreat.Second,as the glaci...     

西藏罗布莎蛇绿岩铬铁矿中金刚石的研究

在西藏罗布莎豆荚状铬铁矿中发现过金刚石,但迄今仍有人因为自己所取的小试样中没有分离出金刚石而否定罗布莎等地金刚石的存在。由于金刚石涉及西藏雅鲁藏布江缝合线和蛇绿岩、铬铁矿成因等问题,笔者重新在罗布莎铬铁矿中取样,经过选矿,又在1500kg样品中选出了25粒金刚石和近70种伴生矿物。这就表明西藏金刚石是的确存在的,而且它和蛇绿岩的铬铁矿同是深部成因的产物。     

塔里木盆地流体与油气藏

本文以塔里木盆地为例，通过流体势分析，油田水化学分析，包裹体测温和原油中含氮化合物的丰度及比值研究，确定塔中地区晚海西期油气主要来自东北和西北两个方向，在中段形成塔中4油藏，并通过流体运移方向分析，认为塔中4油藏在喜马拉雅期受淡水冲洗破坏，使油所储量大大减少，轮南地区的油气主要来自南部的满加尔凹陷和两侧的哈拉哈塘凹陷和草湖凹陷，其中草湖凹陷两次供油气，而其他两个凹陷三次供油气，流体运移方向的研究有助于认识油气的分布规律，对确定勘探的有利区带和目标具有重要意义。     

二连盆地巴音都兰凹陷早白垩世构造岩相带特征及含油性

在系统观察岩心的基础上，从单井相分析入手，结合地震相和测井相模式，以及大量岩矿、粒度等分析化验资料，对巴音都兰凹陷下白垩统巴彦花群的物源方向、沉积体系、构造岩相带及含油性进行了研究。认为区内具有东、西两大物源区、五大水系控制着十一个砂体的平面展布，最终，划分了扇三角洲等五种沉积体系，总结出具平台型陡坡扇三角洲等六种构造岩相带，并着重对有别于典型单断箕状凹陷的三种构造岩相带的含油性进行了初步探讨。     

Cretaceous-Eogene Ostracod Assemblages in Henan and Their Evolutionary Features

This paper studies a large number of Cretaceous-Eogene ostracod fossils in the Meso-Cenozoic Nanyang, Zhoukou, Rendian, Luoyang, Lingbao, Tantou and Kaifeng basins of Henan. Eight ostracod assemblages have been recognized. This paper discusses their geographical distribution and geological ages as well as their features and evolutional trends. Besides, it also deals with the palaeoclimate under which the various assemblages lived and the significance in petroleum exploration.     

城市投资环境综合评价模型及软件系统的建立与应用

本文综合应用 DELPHI法、层次分析法(AHP)、最优综合评价模型、广义量化方法及灰色理论,探讨了城市投资环境评价指标体系,改进了现有权重计算和指标量化方法;建立了城市投资环境综合评价模型,开发了城市投资环境综合评价支持系统。应用该系统对西南三省和华南二省区的59 个城市投资环境进行了多层次综合评价及灵敏度分析,效果较为理想。     

河源地电台全空间地电阻率试验

河源地电台开展的深孔短极距试验观测，其电极深度达６５ｍ左右，μ值（Ｈ／Ｌ）达２．４。这种近似全空间的地电阻率观测方法，经试验证明在降低地电台站地表环境干扰因素的影响，提高观测精度，降低线路造价和维护费用等诸方面的效果是明显的．     

时态地理信息系统研究进展和问题

简要回顾了国内外时态GIS(Temporal GIS)发展历史,从地理时空认知、时空拓扑关系、时空系统理论、时空数据模型以及动态过程模拟等几方面总结了国内外时态GIS研究现状,展望了时态GIS进一步研究必须解决的几个问题。