老年人的休闲涉入与地方依恋——基于广州城市公园的实证研究     

谢涤湘  谢晓亮  兰妍  吴淑琪  周勇坚  常江 《地理科学》2022,42(4):692-701

在广州市7个城市公园收集423份有效问卷,基于吸引力、中心性、自我表现、地方依赖和地方认同等核心概念,构建老年人休闲涉入与地方依恋之间关系的模型。通过验证性因子分析和路径分析,探讨老年人休闲涉入对公园地方依恋的影响关系路径及影响机制。研究发现,休闲涉入的吸引力维度对地方依赖产生了显著的正向影响,自我表现维度正向显著影响地方认同,中心性维度正向显著影响地方依赖和地方认同。验证了休闲涉入与地方依恋之间总体上存在正相关,并将该结论拓展到老年人群体和公园休闲情境中。此外,探讨城市公园中老年人休闲涉入对地方依恋的影响机制,以期在人口老龄化的背景下,为提高老年人的地方依恋提供理论参考和实践建议。  相似文献   

旅游发展背景下侨乡地方意义的叠写与地方认同——以泉州市晋江梧林侨乡为例     

杨勇  邹永广  孙琦 《热带地理》2022,42(1):29-42

运用质性研究方法,以泉州市晋江梧林侨乡为例,从地方意义叠写中的实体维度、社会关系、地方价值观3个层面考察侨乡地方意义叠写的建构特征,揭示了旅游发展背景下侨乡地方意义的叠写过程以及由此带来的包括海外华侨在内不同主体的地方认同问题。研究发现：1）人地错位下的意义叠写主要通过想象和旅游系统等传导机制完成,使侨乡呈现出海外华侨“形式上不在场”,但“内容上处处在场”的特征,并且推动梧林向传统与现代杂糅的地方格局转变。2）地方意义的叠写具有关系属性,多元互动是其形成过程中的显著特征。地方意义本质上是人地关系的一种表现形式,当人地关系不再由传统的地缘关系或亲缘关系决定时,人与地方这一对弱纽带关系也并不能够通过地方意义加以巩固,表现为“侨—眷—乡”关系的异化。3）在地方价值观上,侨乡地方意义经历了从家尺度到国家与民族尺度的意义叠写,凸显了旅游背景下权力对地方意义的选择性表征,动态展演了不同主体的空间价值观取向之争和国家主流文化价值观对地方的引领。4）旅游发展背景下侨乡地方意义叠写引发了海外华侨兼具工具性和选择性的“购物车”式认同以及本地居民的差异化认同,不同主体的认同结构充满张力、分异乃至冲突。  相似文献   

浙江造船业嵌入全球研发网络的特征与路径     

马仁锋  候勃  朱保羽  张文忠  李倩  王玺 《地理科学》2022,42(6):975-983

以中国造船业发达地区浙江省为例,基于专利数据和订单数据运用UCINET6.0和R语言软件刻画全球研发网络对浙江造船业影响以及浙江在其中的地位和作用,甄别国际研发分工下浙江造船业嵌入特征与路径。研究发现：① 浙江造船研发主要集中于船舶及其推进或操舵装置两大类,研发网络节点集中在浙江舟山,主要合作地区为杭州、上海、北京、台州、温州和宁波,合作对象以省内城市为主;② 造船订单数据网络可视化显示浙江造船业技术合作2015年国内合作伙伴主要是辽宁、福建和台湾,2018年增加了上海、广西、海南和天津,国内合作范围与频次快速增长;与国际技术合作由2015年主要与意大利、丹麦等欧洲国家合作转向2018年主要与日本、韩国、新加坡等亚洲国家合作;③ 浙江在长三角造船技术合作的节点地位并不明显,合作产品集中在生产和研发低附加值的集装箱船、散货船,主要嵌入方式是签订技术合作协议、单纯供销、承接维修或改装升级订单等方式。  相似文献   

GIS技术在矿产地数据库及管理信息系统中的应用     

杨家武  张海军  潘启明 《测绘工程》2006,15(6):67-69,76

采用ArcGIS平台开发矿产地图形输入编辑模块,并实现基于SQL Server 2000数据库的网上发布。一方面实现矿产地空间图形信息和属性信息网上浏览、检索和统计功能,另一方面也实现了矿产地空间图形数据的输入输出、编辑和转换功能。  相似文献   

Seasonal Dependence of the North Pacific and North Atlantic SST Predictability and Forecast Skill     

Rong Xinyao  Liu Zhengyu  Liu Yun  Duan Wansuo 《地球科学进展》2017,32(4):382-395

In this paper, the decadal predictability and forecast skill of the Sea Surface Temperature Anomalies (SSTA) in the North Pacific and North Atlantic Ocean were investigated by conducting three sets of perfect model forecast experiments using a global coupled general circulation model. The results show that the annual mean SSTA in the North Pacific is less predictable on decadal time scale, with the forecast skill notably weaker than that of the North Atlantic. By analyzing the predictability and forecast skill of seasonal mean SSTA, it is found that the decadal predictability and forecast skill of the winter mean (JFM) SSTA in the central and western North Pacific are significantly higher than those of other seasons, and the magnitude is comparable with that of the North Atlantic. The predictability and forecast skill of the North Atlantic SSTA also show seasonal variations. Further analysis indicates that the seasonal dependence of the SSTA decadal predictability and forecast skill in the North Pacific is due to the winter-to-winter reemergence mechanism of SSTA in the North Pacific, which results from the seasonal variation of the mixed layer depth of the North Pacific Ocean. While the seasonal dependence of the North Atlantic SSTA predictability and forecast skill might be related to seasonal variations of other processes, such as the Atlantic Decadal Oscillation. The results of this paper suggest that for decadal climate prediction, if the forecast skill of the seasonal mean is taken into account, we might obtain higher than annual mean forecast skill for some seasons.  相似文献   

Capturing channelized reservoir connectivity uncertainty with amalgamation curves     

《Marine and Petroleum Geology》2017

During reservoir characterization all the geological uncertainties affecting the quantity and distribution of hydrocarbons should be captured to assess the risks affecting final recovery.In a typical modeling workflow the geological uncertainties are accounted for through the construction of a sufficiently large set of 3-D static models. Out of this set, a few representative models are selected and dynamically simulated so as to correlate the geological characteristics of the reservoir with its dynamic performance and to propagate the uncertainty onto the final recovery factors, yet maintaining the computational run time acceptable. In channelized depositional environments, which are strongly heterogeneous, the selection approach must also account for channel connectivity, which plays a key role in the possibility of efficiently draining the reservoir for a reasonable number of wells.This study can be seen as a step forward in the assessment of the risks associated to the development of channelized reservoirs under the assumption that a way to express the concept of channel connectivity is channel amalgamation. Channel amalgamation is here defined through amalgamation curves which are numerically described using a set of indexes whose combination provide spatial information of channel intersections. These indexes were calculated for a full set of 3-D geological models and used to steer the selection of a representative model sub-set for subsequent fluid flow simulations.The validity of the index-based selection was verified on different sets of synthetic reservoir models through the evaluation of the representativeness of the model sub-set in reproducing the uncertainty of the original dataset. Eventually, the existence of a strong correlation between channel amalgamation and production performance was proved. From a practical perspective, the possibility to include channel amalgamation in the assessment of the geological models can considerably improve the representativeness of the selected models for uncertainty propagation thus reducing significantly the number of geological models to be considered.  相似文献   

面向数字技术的乡村社会文化地理研究     

王敏  罗志伟  方彦圳  杨晓婷 《地理科学进展》2022,41(3):499-509

随着数字技术的日渐兴起和发展,地方日常生活实践不可避免地受到数字技术的干预,社会空间组织也因此受到复杂的数字化影响。然而,尽管当前地理学研究已呈现出“数字转向”的趋势,但有关数字技术对乡村社会文化空间的研究议题仍有待进一步拓展。基于此,论文通过梳理数字技术地理的研究理论演化,探讨在数字乡村建设背景下社会文化地理的重要价值,围绕空间治理、地方营造和时间性3个主要的研究议题梳理了面向数字技术应用的乡村社会文化地理研究路径,探讨数字技术对乡村发展可能存在的干预潜力。论文的主要目的在于探讨未来数字技术相关研究议题在社会文化地理研究中的拓展方向,以期呼吁学界更多地审视数字技术嵌入而引起的乡村社会空间重构,为乡村全面振兴的未来发展战略提供建议和参考。  相似文献   

上游干支流洪水相关性对下游洪水频率分布的影响——以鄱阳湖抚河为例     

江聪  刘章君  温天福 《湖泊科学》2024,36(4):1232-1240

较大流域下游的洪水往往是由上游干支流洪水叠加形成,而上游洪水变量一般会存在一定的空间相关性。为揭示流域不同来源洪水相关性对下游洪水频率分布特征的影响,本文选取江西省抚河流域作为研究实例,通过广义回归模型构建下游洪水变量对上游干支流洪水变量的条件分布,以此刻画上下游洪水变量之间的关系,然后基于二维Copula函数建立上游干支流洪水变量的联合概率分布,最后由全概率公式推导出下游洪水频率分布,在此基础上,进一步探讨上游洪水变量相关性对下游洪水频率分布特征的影响。结果表明,本文提出的洪水频率分布推导法对抚河李家渡站的洪水频率分布具有较好的拟合效果;上游洪水变量相关性是影响下游洪水频率分布的重要因素,具体来说,相关性的强度与尾部相关性对下游洪水频率分布的均值没有影响,但均对偏态系数C_v与峰度系数C_s等高阶统计特征有较为明显的影响,下游洪水频率分布的C_v值会随上游洪水变量相关性的增强呈现增加趋势,上尾相关性越强,C_v和C_s越大;流域上游洪水变量相关性强度及上尾相关性的增强都会导致下游极端洪水风险升高,此外,重现期较长的极端水文设计值对上游洪水变量相关性的变化更加敏感。  相似文献   

中国关键矿产评价标准和清单的探讨     

郭娟  闫卫东  徐曙光  崔荣国  胡容波  林博磊  周起忠  周舟  杨玲 《地球学报》2021,42(2):151-158

后工业化时代,关键矿产成为大国资源竞争的焦点.随着对关键矿产的需求不断增长,各国会更加关注其供应的稳定性、安全性和可持续性.本文通过对比分析世界主要国家或组织的关键矿产目录,对关键矿产的概念和内涵进行了探讨,阐述了我国关键矿产的评价标准和评价指标,通过对矿产的重要性、供应风险和稀缺性依次分析评价出35种关键矿产,并提出...  相似文献