排序方式： 共有38条查询结果，搜索用时 187 毫秒
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Liu Xiaojin 《地理学报(英文版)》1994,(Z1)
l.Introducti0nIntheseveraldecadestilltheendofthe1970s,therewasnoanyleastd0ubtthatChinahadbeenfollOwingabalancedregi0naldevelopmentstrategy.0bligedtotlledolnesticandinternationalsituationofthattime,capitalinvestlnentxvasn1ost1yf0rcedt0beputintotheundevel0pedarea(westeconomiczone),thisstrategyprovedtobelesseffectiveandincurredahugelossofinvestmentbenefit.Althoughthewestzoneisabundantinnatllralresources(mineral,energyresourcesetc.),thelevelofregionaldevel0pmentfromeastzonet0westzoneisgradua1lydec… 相似文献
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David K. Y. Chu 《The Professional geographer》1982,34(4):431-437
A complete set of Chinese provincial data has recently been published and may be employed to study the regional variations in China. Great regional inequalities are found in industrial outputs, provisions of university places and distribution of qualified doctors. 相似文献
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在综合整理公元前1831年-公元1980年中国地震灾害资料的基础上,运用GIS技术,着重探讨了中国地震灾害的时空特征以及中国地震灾害对交通影响的空间分布与类型分析。中国地震灾害记载的时间分布不平衡,是随时间的推移而逐渐呈现上升趋势;其空间分布也不平衡,元代以前集中于山西、河南、陕西一带,明清时期西南和台湾地区有所增加,民国及1949-1980年主要集中于西南、西北及台湾地区。中国地震灾害对交通影响的空间分布也集中于西北、西南地区,特别是云南、四川和新疆,通过地震烈度的空间分布,可知高烈度的地震对新疆的交通系统影响较大,云南和四川较低烈度的地震对其交通系统的影响也比较大,这是因为3省皆分布于中国强震带内,且四川和云南地形复杂,多山地丘陵,其交通线的分布多沿山川行进,故较易受地震影响。然后,依据破坏程度、次生灾害、交通构筑物破坏可将地震灾害对交通的影响划分为不同的影响类型。 相似文献
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This paper retrieves the yearly and monthly mean 0.75μm aerosol optical depth(AOD) of 41 A-class solar radiation stations over China from 1979 to 1990,and analyzes the spatial and temporal distribution of AOD over China mainland.The data employed are daily direct solar radiation and sunshine duration,as well as the TOMS version-7 ozone observation data in the same time.The results indicate that the Siehuan Basin is the largest center of yearly mean AOD over China.and the other two larger centers lie in Wuhan City and the South Xinjiang Basin,separately.AOD values are also relatively larger in the middle-and-lower reaches area of Changjiang River.Shandong Peninsula and coastal area of Guangdong Province:while in Yunnan Province,coastal area of Fujian Province.most parts of Northwest and Northeast China,AOD values are relatively smaller.The distribution of AOD varies with different months.In most parts of China.the maximum of AOD occurs in spring season;but the minimum varies in different regions,From 1979 to 1990.in the Qinghai-Xizang Plateau,West Siehuan Basin,North Guizhou Province.most areas of the middle-and-lower reaches of Changjiang River,Shandong Peninsula and west part of South Xinjiang Basin.AOD shows an increasing trend.But in Northeast China,most part of Northwest China,Yunnan-Guizhou Plateau,western Guangxi Region and the coastal areas of East China,AOD shows decreasing tendency.Generally,the seasonal variation characteristics of AOD in China can be classified into four typical models,i.e.,mono-modal types A and B,bimodal and Poly-modal. 相似文献
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第二次土地调查中坐标系统转换方法研究 总被引：1，自引：0，他引：1
王履华 《测绘与空间地理信息》2010,33(1):48-51
探讨了第二次土地调查(农村部分)中所涉及到的1954年北京坐标系和1980西安坐标系之间的转换方法,并以实际项目为例,采用不同的检测方法对坐标系统转换精度进行验证,为第二次土地调查中涉及到的坐标系统转换提供思路。 相似文献
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简述了我国在不同时期采用的坐标系统,坐标系的转换方法,Arc GIS空间校正工具的组成,仿射工具在实际工作中的应用方法及精度分析。 相似文献
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Paula Teves-Costa Carlos S. Oliveira M. Luisa Senos 《Soil Dynamics and Earthquake Engineering》2007,27(11):986-999
During the Mw=6.9 January 1, 1980 earthquake in the Azores, the damage distribution in the town of Angra do Heroísmo, in Terceira Island, had a non-homogeneous spatial character. In order to understand the observed pattern of damage a microtremor survey was carried out, using ambient vibrations, and the data were analysed with the J-Sesame software, following the H/V Nakamura methodology. The results are in good agreement with the surface geology and they show a good correlation with the observed damages. Two building surveys were performed, in 1980 on damage evaluation and in 2000 on characterization of few building parameters. With all these elements (surface geology type, soil peak frequency, building type, number of stories and damage level) for 2111 buildings it was possible to perform several interparameter analysis, which enabled the identification of indicators that could be used to improve the damage estimation for future events. 相似文献