基于RS和GIS的甬台地区城市建设用地扩展特征研究

以多时相Landsat MSS,TM 和ETM卫星影像为数据源,利用遥感和GIS手段,提取宁波、台州2市5个时相(1979,1990,1995,2000和2005年)城市建设用地信息,分析了城市建设用地扩展的时间特征、形态特征、空间特征并通过其与人口、GDP因素的相关分析研究其扩展的动力机制.结果表明:①1979年以来,甬台地区城市建设用地总体扩展速度表现为先升后降,而城市建设用地总体扩展强度则表现为不断提高的趋势.②甬台地区城市建设用地的空间结构存在明显的分形特征,城市建设用地空间结构分维逐渐增大,城市建设用地空间复杂性增加,城市建设用地趋向不稳定.③甬台地区城市扩展与社会经济发展具有明显的相关性.     

基于信息熵的山东省城市建设用地演变及驱动力分析

以山东省为研究区域,基于信息熵方法探讨2006—2015年城市建设用地结构及规模演变,并采用主成分分析开展了驱动机制分析。研究发现,山东省城市建设用地规模逐年增加,在空间上存在较大差异,东部沿海经济发展较快的城市扩张较为显著。建设用地结构信息熵呈先下降后上升再下降的波动态势,均衡度也呈波动变化,居住用地、工业用地在山东省城市建设用地中处于优势地位,山东省的城市建设用地仍处在开发状态。经济发展、人口变动、交通及产业结构是影响城市建设用地动态变化的主要驱动因子。     

城镇低效用地再开发政策初探

正随着我国经济发展,人多地少的矛盾不断显化,而对城镇的低效用地进行再开发利用,探索盘活存量建设用地的新途径,对充分释放城市发展空间,更新城市格局,推动城市和产业转型升级具有十分重要的意义。开展城镇低效用地再开发,也是是健全节约集约用地制度,盘活建设用地存量,提高土地利用效率,增强科学发展用地保障的重要抓手。对于贯彻落实创新、协调、绿色、开放、共享的发展理念,推进供给侧结构性改革,促进     

土地收购储备制度与实践中的问题研究

土地储备制度的诞生,对黑龙江省土地交易市场、房地产开发市场以及城市整体规划建设产生了重大影响。有专家学者认为,土地储备制度的建立将成为黑龙江省用地制度新一轮改革的取向,也将是黑龙江省用地制度改革过程中继无偿向有偿使用之后的又一里程碑。     

近32年来南京城市扩展与土地利用演变研究

基于1980-2012年6个时相的遥感影像分类成果,运用扩展强度的等扇分析和土地利用转移矩阵对南京市城市扩展区由城市扩展引起的土地利用布局、结构演化进行了长周期、多时段的研究。结果表明：32年间5个阶段城市扩展的方向极不均匀,城市经历了东北-东南-西南的扩展演化过程,2000年之后的扩展强度显著扩大;在总变化量的构成中,耕地净变化量和交换变化量所占的比重较为接近,在面积净减少的同时,空间位置的转移也较为突出;城市建设用地、城市绿地、采矿用地与裸地以净变化为主,水面、村镇建设用地以交换变化为主;2000年后,各时段耕地和城市建设用地年均总变化量远高于2000年之前,以2004-2008年的值最高,2008-2012年有所回落;32年间各单项类型动态度均较高,城市绿地、村镇建设用地和城市建设用地均达90%以上;综合动态度的结果揭示32年来南京城市的扩展历经了加速演变-变化趋缓-剧烈演变-整合重构4个主要阶段。     

淄川区采取措施进一步深化农村土地管理制度改革

一是落实最严格的耕地保护制度。划定永久基本农田,层层落实保护责任,完善保护补偿机制,落实耕地占补平衡制度,耕地必须先补后占。二是落实最严格的节约用地制度。从严控制城乡建设用地总规模,优化城乡建设用地结构和布局,实行城市建设用地增加与农村建设用地减少挂钩政策。三是深化征地制度改革。严格界定公益性和经营性建设用地,     

深化改革 强化管理 推动国土资源管理工作健康发展

今年以来 ,我们在市委、市政府、省厅的正确领导下 ,紧紧围绕经济建设大局和保护耕地这个中心 ,大力开展“深化改革年”活动 ,积极推进土地使用制度和矿业权制度改革 ,着力加强国土资源法制建设 ,全面开展国土资源开发、利用与保护工作 ,认真解决社会关注、群众关心的热点、难点问题 ,各项工作取得了明显成效。1　服务大局 ,保障全市经济发展对国土资源的需要一是坚持供地“三优先”的原则 ,积极为全市经济建设提供用地保障。今年以来 ,共审批建设用地177宗 ,面积 198公顷 ,其中耕地 112公顷 ;上报城市建设用地 2 4个批次 ,面积 4 34公顷 ,…     

淄博市淄川区新农村建设工作初探

淄博市国土资源局淄川分局以保护耕地、科学规划、合理用地为指导思想,促进城乡土地规划与土地利用总体规划相衔接,加强农田水利综合治理,加大巡查执法检查力度,针对新农村建设中遇到的困难和问题,提出积极争取中央和省级政策支持,用足用活各项现行政策,加大对旧村土地整理的探索实践,抓好农村建设用地管理,积极探索土地征收制度改革,加强动态巡查。     

关键在转变政府职能--依法保障农民土地财产权益之我见

农村土地使用制度改革,首先应在国家和农民利益关系问题上改变指导思想,在方法步骤上宜先从集体建设用地流转入手,再向征地制度改革扩展.     

现行增减挂钩政策在城市周边乡镇的应用

正我国正处于快速城市化阶段,城市周边的乡镇通过征地自然成为城市的一部分,从而获得城市扩展红利,城市周边乡镇也将会因城市经济发展和产业转移的带动而用地量激增。新增建设用地指标的紧缺对应着各类项目用地需求的急切,国土部门不可避免地会面临保护与保障"两难"困境。如何破解这一矛盾,笔者认为可从现行城乡建设用地增减挂     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

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.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

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.     

Information for authors

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     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<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.     

Journal of Mountain Science(JMS)

<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     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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Information for Authors

<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research