Recovery evaluation of villages reconstructed with concentrated rural settlement after the Wenchuan earthquake

Natural Hazards - The past few years have seen the raise of unmanned aerial vehicles (UAV) in geosciences for generating highly accurate digital elevation models (DEM) at low costs, which promises...     

Report on discovery of new Seyfert galaxies

We report our discovery of new active galaxies in a small sample of 23 sources with 2.16 m telescope at Beijing Astronomical Observatory. After wavelength and flux calibration, they are classified by their degree of nuclear activities: one Seyfert 1, three Seyfert 2s, six Seyfert 3s, Seven HII galaxies and one possible Seyfert 3.     

松辽平原活动构造遥感信息分析

本文根据多种图像处理结果提取的线性影像信息,综合地质、地貌、物探等资料,对松辽平原的活动构造进行分析,并根据影像标志对各组线性作了分类。指出了北北东向活动构造对松辽平原的主控作用和北西向构造的活动特征。     

豫西南中新生代古地理环境变迁

豫西南地区曾经是恐龙生活的“家园”。本文根据区内地层发育和出露特点，结合地壳（构造）活动规律，对豫西南中、新生代自然古地理环境（古地理、古环境、古气候、古生态）进行初步研究。这一研究结果对展示中生代恐龙的自然生态、生活环境，揭示恐龙演化规律和灭绝原因，具有一定的理论和实际意义。     

云南天文台太阳光学研究进展

总结和综述了云南天文台２０年来在太阳光学仪器研制和改造，太阳活动现象观测研究，太阳活动预报和国际交流合作方面的成果和进展。     

EKMAN PUMPING OVER MOUNTAINS

The analytical results of the previous paper(Wu,1989)are used to study the properties of vertical veloc-ity distribution at the top of the boundary layer.The relative position of a jet like geostrophic flow and el-lipse-shaped orography will affect the characteristic feature of vertical motion at the top of the boundary layerwhen the contributions of friction and orography are taken into consideration simultaneously.     

浙江诸暨地区陈蔡群主要地质特征及其构造演化探讨

陈蔡群原岩的主体形成于大洋岛弧环境，由拉斑玄武岩和同源辉长岩，碳酸盐岩和浊流沉积的泥砂质碎屑岩组成；经受了中压角闪岩相区域动力—热流变质作用和多期褶皱变形；岩石地球化学和同位素年代资料表明，中国东南的威尔逊旋回在中元古晚期便已开始，即那时于扬子古陆与华夏地块之间存在一大洋盆地，洋壳上可能存在拉张期残留的花岗质陆壳碎块。中元古晚期开始了洋壳消减作用及其有关的火山—沉积作用，新元古晚期陈蔡大洋岛弧地体与双溪坞陆弧地体拼贴、碰撞，壳体间的聚合作用触发了陈蔡群岩石的变质、变形。     

我国沿海近岸带水域的悬沙分布特征

本文根据实测悬沙资料,阐述了我国沿海近岸带水域的悬沙浓度由黄河口和长江口-杭州湾为中心,分别向南、北递减,高低相间,构成波状起伏的分布特征,同时分析了径流输沙、潮流、波浪、海岸类型诸要素在悬沙浓度时空变化中的不同作用.     

F07164+5301: an ESB source with WR features

We report on a new ESB source, as defined by Allenet al. (1991), with Wolf-Rayet (WR) bands in its optical spectrum. The WR bump at 4605-4686 is detected. The bump consists of broad HeII 4686, NV4605-4619, NIII4634-41, and possibly, CIII4647-52 emission. The narrow nebular lines are clearly discernable on our spectrum. The number of WR stars derived from the luminosity of HeII4686 is about 8100. The oxygen abundance is about 9.06×10^–4, greater than the solar value.