中国高尔夫球场时空演变、影响因素和扩散模式     

金万富  何广静  陈乐 《热带地理》2020,40(3):515-524

利用空间分析和数理统计等方法探究了1984—2016年中国高尔夫球场数量时空演变、影响因素和扩散模式。结果表明：1）球场数量变化经历了低速增长期、稳定增长期、加速增长期和紧缩期；2）球场空间分布范围经历了扩张期和收缩期，向北、向西扩散较为明显；3）目前球场主要分布在经济发展水平较高且外向型经济突出的长三角、珠三角和环渤海地区；4）人均GDP、人口规模、区域开放程度、交通优势度、气候类型和土地资源稀缺性与球场空间分布均呈显著正相关，其中交通优势度相关系数最大；5）高尔夫球场空间扩散模式兼具接触性扩散和等级性扩散。  相似文献   

High‐T and low‐P metamorphism in the Xilingol Complex of central Inner Mongolia,China: An indicator of extension in a previous orogeny          下载免费PDF全文

Jin‐Rui Zhang  Chun‐Jing Wei  H. Chu 《Journal of Metamorphic Geology》2018,36(4):393-417

The Xilingol Complex comprises biotite gneisses and amphibolite interlayers with extensive migmatization. Four representative samples were documented and found to record either two or three metamorphic stages. Phase modelling using thermocalc suggests that the observed assemblages represent the final stages that underwent cooling from temperature peaks, and are consistent with a fluid‐absent solidus in P–T pseudosections. Their P–T conditions are further constrained to be 5–6 kbar/680–725°C and 4–5 kbar/650–680°C for two garnet‐bearing gneiss samples, 4–5 kbar/660–730°C for a cordierite‐bearing gneiss sample, and 4–5 kbar/680–710°C for an amphibolite sample based on mineral composition isopleths, involving measured Mg content in biotite, anorthite in plagioclase, grossular and pyrope in garnet and Ti content in amphibole. The peak temperature conditions recovered are 760–790°C or >760°C at 5–6 kbar based on the composition isopleths of plagioclase, biotite, garnet and especially the comparison of melt contents between the calculated and observed. A pre‐peak heating process with slight decompression can be suggested for some samples on the basis of the core–rim increase in the plagioclase anorthite, and the stability of ilmenite. Zircon U–Pb dating using the LA‐ICP‐MS method provides systemic constraints on the metamorphic ages of the Xilingol Complex to be 348–305 Ma, interpreted to represent the post‐peak cooling stages. Moreover, metagabbroic dykes that intruded into the Xilingol Complex yield 317 ± 3 Ma from magmatic zircon, and are considered to have played a significant role for heat advection triggering the high‐T and low‐P metamorphism. Thus, the clockwise P–T paths involving pre‐peak heating, peak and post‐peak cooling recovered for the Xilingol Complex are consistent with an extensional setting in the Carboniferous that developed on a previous orogen in response to addition of mantle‐derived materials probably together with upwelling of the asthenospheric mantle.  相似文献   

中国三大城市群电子商务快递物流网络空间结构及其形成机制研究     

李苑君  吴旗韬  张玉玲  吴康敏  张虹鸥  金双泉 《地理科学》2021,41(8):1398-1408

以中国长三角、京津冀、珠三角三大城市群为案例,基于中国智能物流骨干网（China Smart Logistic Network,CSN）关系数据,采用社会网络分析、随机森林分类算法、QAP分析等研究方法,在县区尺度上探索电子商务快递物流网络空间结构特征及其形成机制。研究发现：① 三大城市群电商快递物流网络密度较高,已形成典型的网络式空间结构。其中长三角城市群网络呈圈层蛛网式结构,县区间联系强度以环杭州湾为中心向外围梯度衰减;京津冀城市群网络受制于行政藩篱,形成“北京?天津”双核心网络结构;珠三角城市群网络联系强度自区域外围由弱到强逐渐向珠江口东岸方向变化,形成“穗（广州）?莞（东莞）?深（深圳）”快递物流廊道。② 三大城市群中物流输出型县区多集中在区域中部,依托中心城市向外物流辐散,而物流输入型县区多分散于外围。③ 城市群电商快递物流网络形成主要受人均可支配收入、常住人口和距离等因素影响。研究结果对于丰富城市网络理论,促进城市群快递物流协调发展,提升现代服务业水平和城市群整体竞争力具有重要意义。  相似文献   

Research progress and prospect on development geography     

Deng  Xiangzheng  Jin  Gui  He  Shujin  Wang  Chengxin  Li  Zhaohua  Wang  Zhanqi  Song  Malin  Yang  Qingyuan  Zhang  Anlu  Chen  Jiancheng 《地理学报(英文版)》2021,31(3):437-455

In this paper,we review the research progress in development geography since the 20th century,focusing on its connotation and theory,fields,methods,and development trends.Specifically,we systematically review the research and applications of development geography,comprising fields such as the convergence of underdeveloped countries and re-gions,and the convergence of the process of improving the quality of life in developed coun-tries and regions.Then,based on an analysis of research progress in development geogra-phy in foreign countries,we examine the development conditions and disciplinary advantages of development geography in China.Further,we highlight that future development geography research in China should focus on the latest international academic research and China's national macro-strategic needs.Future research in development geography should be guided by the theory of sustainable development,the core of which is to improve sustainable liveli-hood capacity and regional green development levels in underdeveloped regions.This core includes the construction of industrial policy and development geography theory,as well as an interdisciplinary integrated research system.The focus must be placed on researching the spatial patterns,diffusion characteristics,and the convergence mechanism of regional de-velopment.Such a focus will facilitate exploration of the regulatory policies and scientific paths that serve regional economic construction and industrial development.  相似文献   

Spatial Association Between Orogenic Gold Mineralization and Structures Revealed by 3D Prospectivity Modeling: A Case Study of the Xiadian Gold Deposit,Jiaodong Peninsula,China     

Liu  Zhankun  Chen  Jin  Mao  Xiancheng  Tang  Lei  Yu  Shuyan  Deng  Hao  Wang  Jinli  Liu  Yuqiao  Li  Shoulei  Bayless  Richard C. 《Natural Resources Research》2021,30(6):3987-4007

Natural Resources Research - The Xiadian orogenic deposit with?~?100 t of gold resources, located in the Jiaodong Peninsula, Eastern China, shows an economically attractive gold...  相似文献   

基于地面三维激光扫描强度数据的潮滩表层含水量估算     

陈锦  谭凯  张卫国 《地球信息科学学报》2020,22(2):290-297

大面积潮滩表层含水量的测定是潮滩研究中的难题,传统的测量方法难以同时满足高效和精度的要求。地面三维激光扫描技术凭借其高精度、高分辨率以及主动性强等优点,已经高效运用在潮滩地形研究中。但是,对潮滩含水量进行有效分析,仅利用点云的空间几何信息是不够的,还需要对点云的强度数据进行挖掘。地面激光扫描仪提供了包含目标表面光谱反射特性的点云强度数据,利用强度数据可以有效地进行目标表面特性提取。本文提出了一种新的长距离地面激光扫描仪强度数据改正方法,对入射角和距离效应进行有效改正。利用Riegl VZ-4000长距离地面激光扫描仪建立室内含水量模型并对上海市崇明岛一处潮滩进行测试分析,同时收集26个潮滩沉积物样品并利用传统干湿称重法进行含水量验证计算。结果表明：相比于传统技术,利用改正后的激光强度值估算大面积潮滩沉积物表层含水量是一种精确和高效的方法。改正后的激光强度值与潮滩表层含水量存在幂函数关系,相关系数为0.961,估算精度为91.94%。  相似文献   

基于LiDAR技术的古建筑复杂曲面三维重建     

辛俊伟  罗艳  程朋根 《测绘与空间地理信息》2017,40(7)

随着信息技术和测绘科学的迅猛发展,传统的空间数据获取模式已经不能满足现在的信息化需求。三维激光扫描技术的出现,推动了现代化测绘技术的发展,其高精度、快速的非接触式扫描测绘方法改变了传统空间数据采集模式。古建筑文化遗产的三维数字化保护是目前社会的研究热点,利用三维激光扫描技术来重建古建筑独特复杂的表面模型,为古建筑数字化管理和修复提供数据参考是一个很有意义的事情。本文以利用地面三维激光扫描系统构建古建筑三维模型为研究对象,通过洞窟类实例对古建筑点云数据处理和NUBRS三维模型复杂曲面重建技术进行研究与探讨。  相似文献   

Gosper地图的非空间层次数据隐喻表达与分析   总被引：2，自引：2，他引：0  

信睿  艾廷华  何亚坤 《测绘学报》2017,46(12):2006-2015

本文借助隐喻地图的思想,研究非空间层次数据的空间隐喻表达与分析,以地图视角对非空间数据进行空间化处理,将抽象数据具象化以降低认知负荷,对地图学相关方法进行综合运用以拓宽其应用外沿。结合制图学经典方法开展地图视觉设计,以自然地貌隐喻数据特征,针对层次数据结构特点,将LOD及Cartogram技术引入隐喻地图的表达分析中,对各层级数据特征进行有效凸显,达到通过地图研究其背后数据规律特征之目的。最后,将本研究提出的方法应用于真实文件层次数据,进行文件数量分布、大文件群落定位、文件纵深分析等试验。结果表明,本研究能够有效表达层次数据,并支持一定的地图分析及数据挖掘工作。  相似文献   

冬春季东亚气溶胶流出通量年际变率的相关环流异常分析     

冯琎  廖宏 《大气科学》2017,41(2):251-262

本文使用戈达德对地观测系统（Goddard Earth Observing System,GEOS）全球三维大气化学传输模式GEOS-Chem模拟了气象场驱动下1986~2006年冬春季东亚到太平洋区域气溶胶的流出通量,分析了流出通量的年际变率及其相关的环流异常。结果表明,偏多（少）的东亚气溶胶流出对应东北亚-西太平洋区域（Northeast Asia-western Pacific,NAWP）500 hPa定常波负值中心强度变强（弱）。NAWP区域500 hPa位势高度场负（正）异常还可能造成气溶胶流出路径的变化,即更多（少）的气溶胶相对于气候态偏北5~10个纬度的路径向太平洋区域传输。这种位势高度场上的异常伴随着对流层中低层西风和大气斜压性异常,从而引起东亚到太平洋区域气溶胶流出通量及其路径的年际变化。  相似文献   

A MODELING STUDY OF PARAMETERIZATION SCHEMES FOR DEPOSITIONAL GROWTH OF ICE CRYSTAL: FOUR RAINFALL CASES OVER TROPICS AND MIDLATITUDES     

辛进  李小凡 《热带气象学报(英文版)》2017,23(3):259-268

Depositional growth of ice crystal is one of the major processes for development of precipitation systems and can be represented by depositional growth of cloud ice from cloud water (PIDW) and depositional growth of snow from cloud ice (PSFI) in cloud-resolving model. Four parameterization schemes are analyzed in the cloud-resolving model simulations of four rainfall cases over the tropics and midlatitudes. The comparison of time and model domain mean data shows that Shen’s scheme produces the closest rainfall simulation to the observation. Compared to Zeng’s scheme, Shen’s scheme improves the mean rain-rate simulation significantly through the dramatic decrease in depositional growth of cloud ice from cloud water. Compared to other schemes, Shen’s scheme produces the better rainfall simulation via the reduction in the mean rain rate associated with the enhanced gain of cloud water and ice.  相似文献