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土地变更调查与新《全国土地分类》衔接有关技术要求 被引量:2
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作者 莫昭安 《南方国土资源》 2003年第4期25-26,共2页
关键词 土地变更调查 《全国土地分类》 变更前图斑 变更后图斑 土地变更调查记录
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国家空间数据基础设施地籍数据内容标准
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作者 孟凡荣 《国土资源情报》 2002年第8期37-46,共10页
关键词 土地记录 土地调查 数据转换 国家空间数据基础设施 地籍数据
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捷克房地产业的改革与发展
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作者 王晓琴 《中外房地产导报》 1996年第21期33-33,共1页
东欧一些国家近年来在社会、政治、经济诸方面发生了很大变化,影响波及社会制度、人们行为方式及信仰等,其中许多国家正向自由市场经济体制转轨。原属东欧的捷克共和国,自从原捷克斯洛伐克共和国中分离出来以后,尽管缺乏土地更新记录与... 东欧一些国家近年来在社会、政治、经济诸方面发生了很大变化,影响波及社会制度、人们行为方式及信仰等,其中许多国家正向自由市场经济体制转轨。原属东欧的捷克共和国,自从原捷克斯洛伐克共和国中分离出来以后,尽管缺乏土地更新记录与物业交易信息,住房抵押贷款体系还不完善。 展开更多
关键词 房地产业 改革与发展 物业 土地记录 正向自由 土地更新 住宅市场 市场自由化 捷克共和国 私有化
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捷克房地产业的市场化
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《中国建设信息》 1997年第6期42-42,共1页
东欧一些国家近年来在社会、政治、经济诸方面发生了巨变,影响波及社会制度、人们行为方式及信仰等。其中许多国家正向自由市场经济体制转轨。原属东欧的捷克共和国,自从原捷克斯洛伐克共和国中分离出来以后,尽管缺乏土地更新记录与物... 东欧一些国家近年来在社会、政治、经济诸方面发生了巨变,影响波及社会制度、人们行为方式及信仰等。其中许多国家正向自由市场经济体制转轨。原属东欧的捷克共和国,自从原捷克斯洛伐克共和国中分离出来以后,尽管缺乏土地更新记录与物业交易信息,住房抵押贷款体系还不完善,并受到不动产租金控制引起的扭曲市场的影响,但仍能坚持走土地与住宅市场私有化这条改革之路。捷克通过采取对不动产的拍卖、资产债券化分配、竟买等方法,催生了一级房地产市场。 展开更多
关键词 房地产业 市场自由化 住房抵押贷款 斯洛伐克共和国 私有化 不动产租金 房地产投资 房地产市场 住宅市场 土地记录
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Spatial Distribution and Changes of Heavy Metals of Agricultural Lands in Typical Pregrading Coast in Dongtai City,Jiangsu Province,China 被引量:4
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作者 LIAO Fuqiang ZHOU Shenglu +2 位作者 ZHANG Hongfu WU Shaohua ZHAO Qiguo 《Chinese Geographical Science》 SCIE CSCD 2008年第3期276-283,共8页
According to the historical changes of coastal lines, seven soil sampling districts, from land to sea, were arranged in Dongtai City, Jiangsu Province to sample soils from surface and profile. Concentrations of seven ... According to the historical changes of coastal lines, seven soil sampling districts, from land to sea, were arranged in Dongtai City, Jiangsu Province to sample soils from surface and profile. Concentrations of seven major heavy metals (HMs), granularity, pH, organic matters and C/N of the soil samples were analyzed. Results show that concentrations of heavy metals in agricultural land present a certain spatial variance, decreasing from land to sea. Pollution assessment indicates that the agricultural soils were not polluted by HMs, but the potential pollution of Cu and Hg needs to be alerted. Different HMs accumulate in the surface and sub-surface of the soil profiles, and concentrations of Hg and Pb decrease significantly with the increment of soil depth. Concentrations of HMs exhibit a significantly negative correlation to pH, but have no significant relation with organic matters in soil. Principle component analysis show that the concentrations of HMs relate to the land use history. Concentrations of Hg, Ni and Cr in soil are closely related with land use history, and concentrations of Pb, Cu and Cr are affected by land use history as well as other factors. However, there is no significant relation between concentration of As and land use history. 展开更多
关键词 coastal zone agriculture land heavy metal land use history
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Dynamic response characteristics of super high-rise buildings subjected to long-period ground motions 被引量:4
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作者 陈清军 袁伟泽 +1 位作者 李英成 曹丽雅 《Journal of Central South University》 SCIE EI CAS 2013年第5期1341-1353,共13页
Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground ... Spectrum characteristics of different types of seismic waves and dynamic response characteristics of super high-rise building structures under long-period ground motions were comparatively analyzed. First, the ground response wave (named LS-R wave) of a soft soil site with deep deposit, taking long-period bedrock seismic record as input, was calculated by wave propagation method. After that, a TOMAKOMAI station long-period seismic record from the Tokachi-Oki earthquake and conventional E1-Centro wave were also chosen. Spectrum characteristics of these waves were analyzed and compared. Then, a series of shaking table tests were performed on a 1:50 scale super high-rise structural model under these seismic waves. Furthermore, numerical simulation of the prototype structure under these excitations was conducted, and structure damages under different intensive ground motions were discussed. The results show that: 1) Spectrum characteristics of ground response wave are significantly influenced by soft soil site with deep deposit, and the predominant period has an increasing trend. 2) The maximum acceleration amplification factor of the structure under the TOM wave is two times that under the E1-Centro wave; while the maximum displacement response of the structure under the TOM wave is 4.4 times that under the E1-Centro wave. Long-period ground motions show greater influences on displacement responses than acceleration responses for super high-rise building structures. 3) Most inelastic damage occurs at the upper 1/3 part of the super high-rise building when subjected to long-period ground motions. 展开更多
关键词 long-period ground motion super high-rise building shaking table model test numerical simulation spectrumcharacteristic analysis
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Carbon emissions induced by cropland expansion in Northeast China during the past 300 years 被引量:9
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作者 LI BeiBei FANG XiuQi +1 位作者 YE Yu ZHANG XueZhen 《Science China Earth Sciences》 SCIE EI CAS 2014年第9期2259-2268,共10页
Assessments of the impacts of land use and land cover changes(LUCC) on the terrestrial carbon budget, atmospheric CO2 concentration, and CO2-related climatic change are important to understand the environmental effect... Assessments of the impacts of land use and land cover changes(LUCC) on the terrestrial carbon budget, atmospheric CO2 concentration, and CO2-related climatic change are important to understand the environmental effects of LUCC and provide information about the effects of historical carbon emissions. Using regional land cover reconstructions from historical records, with a bookkeeping model, we estimated the carbon sink changes caused by historical cropland expansion in Northeast China during the past 300 years. The conclusions are as follows:(1) There was a dramatic land reclamation of cropland during the past 300 years in Northeast China. Approximately 26% of the natural land was cultivated, and 38% of the grassland and 20% of the forest and shrubland were converted to cropland.(2) The carbon emission induced by cropland expansion between 1683 and 1980 was 1.06–2.55 Pg C, and the estimation from the moderate scenario was 1.45 Pg C. The carbon emissions of the soil carbon pool was larger than that from the vegetation carbon pool and comprised more than 2/3 of the total carbon emissions.(3) The carbon emissions of the three provinces in Northeast China were different. Heilongjiang Province had the largest carbon emissions, and Jilin Province had the second largest emissions.(4) The primary source of carbon emissions was forest reclamation(taking 60% of the total emissions in the moderate scenario), the secondary source was grassland cultivation(taking 27%), and the tertiary sources were shrubland and wetland reclamation(taking 13%). Examination on the data accuracy revealed that the high-resolution regional land cover data allowed the carbon budget to be evaluated at the county level and improved the precision of the results. The carbon emission estimation in this study was lower than those in previous studies because of the improved land use data quality and various types of land use change considered. 展开更多
关键词 cropland expansion carbon budget 300 years Northeast China
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Accuracy assessment of approaches to spatially explicit reconstruction of historical cropland in Songnen Plain,Northeast China 被引量:1
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作者 姜蓝齐 张丽娟 +1 位作者 臧淑英 张学珍 《Journal of Geographical Sciences》 SCIE CSCD 2016年第2期219-229,共11页
To understand historical human-induced land use/cover change (LUCC) and its climatic effects, it is essential to reconstruct historical land use/cover changes with explicit spatial information. In this study, based ... To understand historical human-induced land use/cover change (LUCC) and its climatic effects, it is essential to reconstruct historical land use/cover changes with explicit spatial information. In this study, based on the historically documented cropland area at county level, we reconstructed the spatially explicit cropland distribution at a cell size of 1 km × 1 km for the Songnen Plain in the late Qing Dynasty (1908 AD). The reconstructions were carried out using two methods. One method (hereafter, referred to as method 1) allocated the cropland to cells ordered from a high agricultural suitability index (ASI) to a low ASI, but they were all within the domain of potential cropland area. The potential cropland area was created by excluding natural woodland, swamp, water bodies, and mountains from the study area. The other method (hereafter, method II) allocated the cropland to cells in the order from high ASI to low ASI within the domain of cropland area in 1959. This method was based on the hypothesis that the cropland area domain in 1959 resulted from enlargement of the cropland area domain in 1908. We then compared these two reconstructions. We found that the crop- land distributions reconstructed by the two methods exhibit a similar spatial distribution pat- tern. Both reconstructions show that the cropland was mostly found in the southern and eastern parts of the Songnen Plain. The two reconstructions matched each other for about 68% of the total cropland area. By spatially comparing the unmatched cropland cells of the two reconstructions with the settlements for each county, we found that unmatched cropland cells from method I are closer to settlements than those from method I1. This finding suggests that reconstruction using method I may have less bias than reconstruction with method I1. 展开更多
关键词 comparison of methods cropland cover late Qing Dynasty Songnen Plain Northeast China
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