期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
The Geoscience Transect from Xiangshui,Jiangsu Province to Mandal,Inner Mongolia 被引量:4
1
作者 Ma Xingyuan Liu Changyuan Liu Guodong Jiang Minxi Institute of Geology,State Seismological Bureau,Beijing Geophysical Exploration Pafrty,State Seismological Bureau,Zhengzhou. 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1992年第1期1-21,共21页
The Xiangshui to Mandal geoscience transect, which has a total length of 1,200 km, extends diagonally,from SE to NW, across the Sino-Korean plate and its ancient continental margin, passing through nine tectonicunits:... The Xiangshui to Mandal geoscience transect, which has a total length of 1,200 km, extends diagonally,from SE to NW, across the Sino-Korean plate and its ancient continental margin, passing through nine tectonicunits: the Subei-Jiaonan terrane, West Shandong block, North China rift basin, Taihang-Wutai block, Ordosblock, Hu-Bao (Hohhot-Baotou) Basin, Yinshan block and Inner Mongolian fold system. The graphic display of the transect is compiled according to the Guidelines for the Global GeoscienceTransect (GGT) Project on the basis of an integrated study of all available geological, geochemical andgeophysical data, thus bringing light to the process of cratonization of the Sino-Korean plate and its relation-ship with the transitional zone of the ancient continental margin, and the features of intraplate structures pro-duced by subsequent tectonic modifications and intraplate dynamics. 展开更多
关键词 The Geoscience Transect from Xiangshui Jiangsu Province to mandal Inner Mongolia
在线阅读 下载PDF
Spatial-Temporal Analysis of LU/LC Classification in Nirmal Mandal, Adilabad, Telangana State, India, by Using Remote Sensing and GIS
2
作者 Dr T. Madhu D. Naresh Kumar +7 位作者 D. Niteesh Reddy P. V. E. Ravi Teja L. Narayana V. Vishal B. Subash A. Maniratnam Y. Vasavi V. Shakeena 《International Journal of Geosciences》 2017年第11期1315-1331,共17页
In this project, we studied land use and land cover classification of Nirmal Mandal, Adilabad district, Telenagna state by using Geographical Information system and Remote sensing techniques. LISS-IV satellite image r... In this project, we studied land use and land cover classification of Nirmal Mandal, Adilabad district, Telenagna state by using Geographical Information system and Remote sensing techniques. LISS-IV satellite image resolution 5 m × 5 m provides quality information for identification of Land use/Land cover characteristics. The image accuracy shows 45.70% of Agricultural land, 9.10% Built-up land, Forest area is 7.90%, Barren land have 7.60% and Uncultivated land occupied 29.70%. National land use and land cover mapping report based on 5 divisions classified in the study area. The area land use and land cover classification provide reliable data to understand land, water, soil, forests, urban sprawl. This socio economic survey significantly shows the changes that so far have taken place. This will help the people/farmers for the future land use and land cover change detection. Regular monitoring of agriculture, forest and greening efforts for plantation at suitable area, schemes and limitations. Free ware browsing of land cover gives sufficient development to plenty resource. 展开更多
关键词 Nirmal mandal GIS LU/LC CLASSIFICATION
暂未订购
曼陀罗体系:古代东南亚的地区秩序研究 被引量:21
3
作者 吕振纲 《太平洋学报》 CSSCI 北大核心 2017年第8期27-39,共13页
在古代东亚世界,朝贡体系并非是唯一的地区体系,东南亚地区内部存在一个独立的曼陀罗体系。东南亚的世界秩序观受到印度教-佛教文化的影响和印度政治哲学的教诲。单一的曼陀罗体系内部可以分为三个不同层次,分别是核心圈、控制圈和朝贡... 在古代东亚世界,朝贡体系并非是唯一的地区体系,东南亚地区内部存在一个独立的曼陀罗体系。东南亚的世界秩序观受到印度教-佛教文化的影响和印度政治哲学的教诲。单一的曼陀罗体系内部可以分为三个不同层次,分别是核心圈、控制圈和朝贡圈。不同的层次之间有着不同的互动形式,战争主要发生在不同的曼陀罗中心以及中心和朝贡圈之间。曼陀罗体系有三个典型特征:中心的特殊性、变化性和多元性、普遍存在的双重或多重朝贡事实以及体系内部不同圈层的流动性。无论从观念还是从结构上看,曼陀罗体系都不是朝贡体系的附庸,也不能简单看作是朝贡体系的一部分,但由于这两种体系采取共同的朝贡形式、中国被视为一个可接受的曼陀罗中心以及两种地区秩序理念的互补性这三个因素,朝贡体系与曼陀罗体系在一定程度上实现了和谐共生。 展开更多
关键词 曼陀罗体系 朝贡体系 东南亚 地区秩序
在线阅读 下载PDF
朝鲜平南盆地泥盆纪化石的发现及其地质意义
4
作者 金炳成 刘永江 杨卫民 《吉林大学学报(地球科学版)》 EI CAS CSCD 北大核心 2011年第1期79-85,共7页
平南盆地位于中朝地台东缘朝鲜半岛中部。平南盆地古生界比较发育,特别是盆地中南部地区发育寒武系、奥陶系和志留系,仅在盆地东南部谷山、法洞地区发现了晚奥陶世到志留纪的地层,其它地区末曾发现过晚奥陶世到早石炭世的地层。最近在... 平南盆地位于中朝地台东缘朝鲜半岛中部。平南盆地古生界比较发育,特别是盆地中南部地区发育寒武系、奥陶系和志留系,仅在盆地东南部谷山、法洞地区发现了晚奥陶世到志留纪的地层,其它地区末曾发现过晚奥陶世到早石炭世的地层。最近在平南盆地中部平壤之东原中奥陶统(晚达组)上部发现了Chaetetes cf.nantanensis,Calceolasp.,Thamnoporasp.,Cladoporasp.等指示泥盆纪的化石;该含化石层的走向延续性比较好,延伸长度2~3km。基于上述研究,认为原来的中奥陶统(晚达组)上部可能为泥盆系。在中朝地台,除了西缘和西南缘地区以外,大部分地区没有发现晚奥陶世—早石炭世的地层,只有辽东太子河流域本溪组的地质时代被认定为早石炭世晚期到晚石炭世早期。这些泥盆纪、早石炭世化石都发育在中朝地台东部,说明古生代时期中朝地台西部和东部沉积环境及构造演化有差别,因而对于中朝地台古生代古地理和构造演化需要重新认识。 展开更多
关键词 中朝地台 平南盆地 晚达组 泥盆纪 化石
在线阅读 下载PDF
L-扁桃体酸脱氢酶的电化学特性
5
作者 刘慧宏 Hill +2 位作者 H.A.O. Chapman S.K.3 《分析化学》 SCIE EI CAS CSCD 北大核心 2001年第7期755-759,共5页
应用电化学方法研究了基因工程酶 (L 扁桃体酸脱氢酶 )的电化学性质 ,探讨了其催化机理。以聚赖氨酸为促进剂 ,L 扁桃体酸脱氢酶黄素微区在裂解石墨棱面 (EPG ,edge planepyrolyticgraphite)电极上有两对氧化还原峰 ( -0 .4 81V和 -0 .6... 应用电化学方法研究了基因工程酶 (L 扁桃体酸脱氢酶 )的电化学性质 ,探讨了其催化机理。以聚赖氨酸为促进剂 ,L 扁桃体酸脱氢酶黄素微区在裂解石墨棱面 (EPG ,edge planepyrolyticgraphite)电极上有两对氧化还原峰 ( -0 .4 81V和 -0 .60 5Vvs.SCE ,Tris缓冲溶液pH 7.5,扫描速度 2 0mV/s) ,显示出酶的辅基黄素单核苷酸 (FMN)与电极之间的电子传递过程。在此条件下 ,L 扁桃体酸脱氢酶黄素微区不能催化L 扁桃体酸脱氢 ,但用二茂铁甲酸和细胞色素C作为媒介体 。 展开更多
关键词 基因工程酶 L-扁桃体酸脱氢酶 电化学性质 L-扁桃体酸 催化脱氢 催化机理
在线阅读 下载PDF
曼荼罗化的村庄:西藏昌都嘎雪的神圣地景与生态观
6
作者 刘冬梅 《青海民族研究》 CSSCI 北大核心 2014年第3期23-27,共5页
本文借用"曼茶罗化"这一概念,对西藏昌都嘎雪这一康区藏族村落的神圣地景进行解读,并以此对当地的生态观与实践进行理解。笔者认为,嘎雪的"生态-神圣"地景传达着一种超越人类中心的生态观。在这个地方被曼荼罗化的... 本文借用"曼茶罗化"这一概念,对西藏昌都嘎雪这一康区藏族村落的神圣地景进行解读,并以此对当地的生态观与实践进行理解。笔者认为,嘎雪的"生态-神圣"地景传达着一种超越人类中心的生态观。在这个地方被曼荼罗化的过程中,佛法作为一种实践,成为协调各种力量的中介。在纵向的维度,祭山仪式、有关地景的佛教化传说,将过去与现在相关联,并影响着人们的生态实践;在横向的方面,佛法也成为维持自然秩序与人类社会秩序的技术形式。 展开更多
关键词 曼荼罗化 神圣地景 生态观
在线阅读 下载PDF
Hydrogeomorphology, NDWI and, NDVI of the Meghadrigedda Sub-Watersheds for Optimal Utilization of Resources, Visakhapatnam District, Andhra Pradesh-India Using Landsat Data 2000 and sentinel Data 2020
7
作者 Usha Chirala Bhavana Pedada 《International Journal of Geosciences》 2021年第6期584-604,共21页
With global warming and over<span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span... With global warming and over<span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">-</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">exploitation of water resources due to population explosion and related issues, numerous studies are being carried around the world </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">in</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> an effort to reinstate a state of a balanced life between the existing water resources and </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">their</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> utilization by human beings. Keeping in view, a watershed of 366</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">sq</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">km on 1:50</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">,</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">000 scale 65</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">O</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">/1 SOI map surrounding the Meghadrigedda reservoir in Visakhapatnam district of Andhra Pradesh, India has been taken up for the study. The watershed has been delineated into nine sub-watersheds and hydrogeomorphology, drainage, drainage density, slope, NDVI and NDWI of the study area has been carried out using Landsat data 2010 and Sentinel data 2020 in ARCGIS 10.0 environment.</span></span></span><span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">All the villages in the catchment greatly depend on groundwater for irrigation, drinking as well as personal utilization. Change detection has been carried on to display the decline in surface water and ground water due to increased concentration of built-up land, siltation of ponds as well as decrease in the number of ponds. The watershed is experiencing large scale anthropogenic activities. The government must curb built-up activities and desilt the ponds to sustain the monsoon water, facilitating more recharge. The results of the study can serve as a basis for planning as well as for the development of a sustainable basin area.</span></span></span> 展开更多
关键词 MORPHOMETRY Meghadrigedda GIS mandal
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部