Results 11 to 20 of about 4,168 (163)
Zhejiang Daxue xuebao. Lixue ban, 2016 利用1998〜2013年中国大陆30个省区外商直接投资(FDI)和入境商务旅游(IBT)的面板数据，基于重力模型和空间错位指数模型研究了二者的空间错位现象、特征及动力机制.结果发现：FDI与IBT存在空间错位且空间错位距离S逐年增加，预测至2018年S将达702. 42 km；二者的空间错位具有空间差异性，呈现出一定的地带差异（东部的空间错位态势较中西部更为显著）和省际差异（广东和江苏SMI排名前两位，甘肃和吉林SMI排名后两位）；东部的空间错位格局决定了全国的空间错位格局 ...
BAOFuhua(包富华), CHENYing(陈瑛)
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Shuitu Baochi Xuebao, 2023 陕西汉江流域是"南水北调"中线工程的主要水源地,属于国家重点生态功能区。研究流域内景观格局的时空变化特征、生态系统服务价值和景观生态风险的相关性,对保持流域内生态系统稳定性、保障流域生态安全具有指导意义。基于2000年、2005年、2010年、2015年、2020年陕西汉江流域5期土地利用数据,采用景观格局指数计算、生态系统服务价值评估、景观生态风险评估等方法,研究景观格局变化下生态系统服务价值、景观生态风险的时空演变机制及空间相关关系。结果表明:(1)2000—2020年 ...
孟晓璐, 张艳芳
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Zhejiang Daxue xuebao. Lixue ban, 2023 城市网络已成为一种重要的区域空间组织模式，优化区域空间结构对推动城市高质量发展具有重要意义。首先，以福建省9个设区市为研究对象，基于服务流、信息流、物流和知识流构建了城市综合联系网络，采用社会网络分析等方法，分析了2011，2014，2017，2019年福建省城市综合联系网络的空间格局演化及结构特征演化。结果表明，福建省城市综合联系网络基本形成“福厦双核、沿海一带”的组织模式，“闽西南密、闽东北疏，海陆联系较弱”的空间格局未发生显著变化，不均衡特征明显，但极化特征有所缓解。其次，从福建省“十四五”规划 ...
魏婧卉(WEI Jinghui) +1 more
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Spatial Pattern and Dynamic Evolution of Carbon Ecological Security Level in Yellow River Basin [PDF]
, 2023 [Objective] The spatial differences and dynamic evolution of carbon ecological security level were analyzed to optimize the overall plan of carbon ecological security in the Yellow River basin (an important “energy basin” in China) in order to ...
Jiang Yuqi +3 more
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Water Use Strategy of Reaumuria Songarica Population in Steppe Desert Region Based on Spatial Distribution [PDF]
, 2023 [Objective] The relationship between water adaptation and the distribution pattern of desert shrubs at the regional scale was studied and the process and mechanism of plant population response to environment in arid and semi-arid areas was analyzed in ...
Dong Lei +6 more
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Zhejiang Daxue xuebao. Lixue ban, 2018 青海省宗教发展历史悠久，宗教旅游资源丰富，宗教场所的空间分布特征对青海省区域旅游格局有重要影响.对青海省宗教场所旅游资源进行了统计，分别从空间分布模式、差异性、密度等方面采用最邻近指数、地理集中指数、洛伦茨曲线、核密度方法对其空间格局特征进行了定量分析，并利用空间回归分析法探讨了其分布与海拔、坡度、交通、水系等因素的关系.结果表明：青海省宗教场所旅游资源呈“东多西少”的集聚分布态势，空间差异显著，旅游资源集中在青海省11%地区；空间分布密度呈由东向西辐射（型）的分布趋势；空间回归分析结果显示，在地势平坦、
ZHULitao(朱利涛) +3 more
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Analysis of Driving Factors and Predictions of Arable Land Area Based on PLUS Model [PDF]
, 2023 [Objective] The spatial and temporal evolutionary characteristics of arable land in the Tumen River basin and the driving factors for changes in arable land area were explored, and changes in arable land area associated with the Land Spatial Planning of ...
Jin Ri +4 more
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Wildlife Letters, EarlyView.Using a 3‐year, broad‐scale camera‐trap network in western Kansas, we tested whether coyotes and American badgers exhibit spatiotemporal patterns consistent with coordinated hunting. Despite high diel activity overlap, detection‐conditioned co‐detections occurred far less frequently than expected under independence, and short‐term temporal sequencing ...
Ty J. Werdel +3 more
wiley +1 more source
A Study of Spatial-Temporal Difference and Spatial Effect of Pan-Yangtze River Delta’s Tourism Economy——A Spatial Econometrics Perspective [PDF]
, 2016 由于我国区域间社会经济发展水平、基础设施条件、旅游资源禀赋、旅游服务水平等方面的差异，不同地区间旅游经济的发展会呈现不同的时空特征。同时在经济活动外部性的作用下，区域旅游经济发展也存在着某种程度的溢出效应。国内学者在对我国区域旅游经济发展差异的研究中，研究尺度多集中在省域范围，对旅游经济发展空间效应的研究还有待丰富。本文拟探究区域旅游经济发展时空差异特征及其空间效应，并根据实证结果提出对策建议，促进地区间旅游经济协调发展，形成相互联动、互利共赢的区域旅游发展格局 ...
冷翔
core
Wildlife Letters, EarlyView.Although once abundant across its range, gray foxes (Urocyon cinereoargenteus) are purportedly declining. While range maps indicate that gray fox potentially occur throughout the central United States, contemporary distribution maps are needed. We developed a Habitat Suitability Model for six states, leveraging gray fox presence data in an ensemble ...
Daniel J. Benson +4 more
wiley +1 more source