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美国是自由市场经济国家,土地分为私人所有、联邦政府所有和州政府所有三种。美国农地市场是在完全的市场经济条件下形成的,政府通过经济手段和法制手段管理农地流转,农地市场是一种“准完全竞争性”市场。法律保护农地所有权不受侵犯,允许私人土地买卖和出租,政府一般不予干涉。出售土地时,买卖双方根据当时农地的市场价值评估买卖价格,达成买卖协议,既可由买卖双方自己协商,也可聘请私人估价公司,然后双方共同到县政府办理变更登记手续,以实现土地产权的转移,完成交易。 相似文献
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吴春宝 《资源导刊(河南)》2009,(6)
美国:自由式的政府监管 美国是自由市场经济国家,土地分为私人所有、联邦政府所有和州政府所有三种.美国农地市场是在完全的市场经济条件下形成的,政府通过经济手段和法制手段管理农地流转,农地市场是一种"准完全竞争性"市场.法律保护农地所有权不受侵犯,允许私人土地买卖和出租,政府一股不予干涉.出售土地时,买卖双方根据当时农地的市场价值评估买卖价格,达成买卖协议,既可由买卖双方自己协商,也可聘请私人估价公司,然后双方共同到县政府办理变更登记手续,以实现土地产权的转移,完成交易. 相似文献
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通过收集和整理有关潍坊市住宅小区价格的信息资料,运用地理信息系统的空间分析方法,利用Visifire插件绘制出该市住宅小区价格概率分布图,以揭示住宅小区价格的空间分布规律,并分析其形成的内在机制.初步得出潍坊市住宅价格空间格局的影响因子为:区位因素、市场供求因素、交通因素和环境因素. 相似文献
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采用近30年来的统计数据,对改革开放以来中国农业生产的总体趋势进行了分析描述,认为以农林牧渔业增加值(第一产业增加值)表示的农业生产水平总体上呈现上升趋势;通过对影响农业生产的因素运用因子分析法进行综合归纳,认为投入因子、土地面积因子以及价格因子是影响农业生产最主要的公共因子。最后运用投入因子、土地面积因子以及价格因子建立了中国农业生产总体情况的预测模型。 相似文献
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地铁工程地质灾害危险性综合评估定量方法——以西安地铁一号线为例 总被引：1，自引：0，他引：1
以西安市地铁一号线建设工程地质灾害危险性评估为例,对综合评估量化评分方法进行了理论探讨和实例分析,主要讨论了评估因子的选取、各因子权重和分级取值、危险性等级划分和各级分值范围确定、评分方法和步骤等几个方面的内容.实例分析结果表明,基于本文量化评分方法基础上的地质灾害危险性分区能够较好地反映多因素的综合影响,评估结果合理可信. 相似文献
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一、影响因子选取原则
城镇土地是自然、社会、经济的综合产物。城镇用地级别价格是由自然生产潜力和社会经济相互作用而形成的。影响城镇用地定级估价的因素很多。在选取因素时,应考虑当地的实际情况,按不同地类,选择性质相对稳定的、相关性小、差异性大、并使得因素自身的变化对土地生产力产生明显影响的因素作为参评因素。一般来说．在选取定级因素时应遵循以下原则。 相似文献
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正Rapid changes of Arctic sea ice cover have been in the focus of the international climate research community in recent years.Quite a few of nations have completed a large number of related surveys and research projects in the Arctic Ocean.Up to now,China has performed six research cruises to the Arctic Ocean resulting in a significant volume of research output.Improved knowledge on the atmospheree-sea ice-ocean interactions in the Arctic is a 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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The GRV 024516 and GRV 024517 meteorite samples collected from Grove Montains,Antactica are ureilite and H5 ordinary chondrite,respectively.Based on the study of mineralogy-petrology,the cosmic-ray exposure ages and gas retention ages of these two meteorites were determinated and calculated.Their cosmic-ray exposure ages are 33.3 Ma,51.7 Ma,and gas retention ages are 1936.8 Ma and 3720 Ma,respectively.The ureilite contains diamond,graphite and amorphous C,which are mainly carrier of noble gases indicating obviously shock metamorphism effects,which induced 40Ar partial loss.The H5 chondrite indicates thermal metamorphism of parent body,its gas retention age fall the range between 3220 Ma and 4510 Ma of the least shocked H5 chondrites 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet. 相似文献
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《山地科学学报》2014,(4)
<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by 相似文献