International rivers as border infrastructures: En/forcing borders in South Asia

Rivers have long been convenient yet troublesome borders. Inherently itinerant, rivers routinely defy cartographic depictions of borders as static, territorially bounded formations. Such dynamism poses material and conceptual challenges to state regulatory activities, resulting in increasingly heterodox attempts to fix waterbodies through various securitizing mechanisms. I examine the dialectical relationship between rivers and borders through the concept of the river-border complex. I ask how the Ganges River shapes the form and function of the Indo-Bangladeshi border and how, in turn, bordering practices in India regulate flows along the river, which comprises 129 km of India's border with Bangladesh. Drawing on archival records, in-person interviews, and river data, I find that the border and efforts to secure it mediate many flows along the river. The study corroborates previous work within critical border studies that securitizing cross-border flows has the perverse effect of generating greater insecurity in adjoining countries. Crucially, historical analysis of sediment, information, and human flows reveals how international rivers also determine patterns and processes of circulation and thereby warrant reconceptualization as border infrastructures, rather than as merely being subject to them.     

多情境下城市时空间行为的社会分异——以北京不同住房来源居民为例

近年来,居民时空间行为的社会分异已成为学者们广泛关注的话题。然而,已有关于居民时空间行为的社会分异研究中,缺少对于居民活动情境的社会分异的研究。因此,本研究基于时间地理学中对人类活动的情境嵌入性与情境的不同维度的相关理论,以北京清河街道为例,分析不同住房来源居民在日常情境、地理情境和社会情境下的时空间行为的社会分异,尝试从多个情境维度拓展对时空间行为社会分异的理解。研究发现,市场性住房居民“朝九晚五”的活动特征明显,活动同伴选择外向性突出;单位性住房居民职住相对接近,在社区空间内分配时间最长且活动目的多样;安置性住房居民活动较为分散,地理情境与社会情境都呈现出“家庭内向性”特征;保障性住房居民非工作活动的“滞后性”明显,对社区空间的时间分配总体较低。除住房来源因素与个人社会经济因素外,建成环境因素对于居民对社区空间的使用有显著影响。     

The role of aviation networks for urban development

City officials are continuously working to attract airlines willing to fly to new destinations. The inherent expectation is that a more extensive aviation network stimulates economic growth. This paper investigates empirically the causal implication of this hypothesis. Using data on nonstop flights by origin and destination over the period 1984–2013, we propose a new measure for a metropolitan area's connectivity to the national aviation network. We then use this measure to investigate its contribution to local economic development, as captured by the growth in population, in total employment, in per-capita income, and new firm entry. To ensure causality, we use instrumental variable methods that exploit geography and destination airports growth as a way to capture the exogenous variation in the likelihood to add new travel routes. Our results suggest that a metropolitan area's air connectivity, resulting from an expansive local aviation network, has a positive effect on population, on employment and on the number of businesses established in that location.     

The Advocacy Coalition Index: A new approach for identifying advocacy coalitions

Policy scholars have increasingly focused on collaborative and competitive relationships between stakeholder coalitions. The Advocacy Coalition Framework (ACF) in particular has directed scholarly attention toward such relationships. The ACF defines advocacy coalitions as groups of actors who share beliefs and coordinate their action. However, previous research has been inconsistent in defining and measuring coalitions, which has hampered comparative research and theory building. We present a method called the Advocacy Coalition Index, which measures belief similarity and the coordination of action in a manner that makes it possible to assess the extent to which advocacy coalitions are found in policy subsystems, whether subgroups resemble coalitions, and how individual actors contribute to coalition formation. The index provides a standardized method for identifying coalitions that can be applied to comparative research. To illustrate the effectiveness of the index, we analyze two climate change policy subsystems, namely Finland and Sweden, which have been shown to differ in terms of the association of belief similarity with coordination. We demonstrate that the index performs well in identifying the different types of subsystems, coalitions, and actors that contribute the most to coalition formation, as well as those involved in cross-coalition brokerage.     

节庆事件对区域旅游流空间网络的影响效应和机制研究

以洛阳牡丹花节为例,通过多源数据的融合,运用社会网络、因子分析方法,探究节庆事件对区域旅游流空间网络的影响效应及机制。结果表明：节庆事件对区域旅游流空间网络影响表现为协同、弱化及蜂聚三种效应,不同效应影响机制不同。其中,节点的等级和知名度优势非常明显的态势下,产生显著的协同效应;节庆游憩区内的低等级节点出现轻微的节庆弱化效应,区域外节点主要受到空间交通距离限制产生了显著的节庆弱化效应;旅游等级很强且旅游承载量优势非常明显的非节庆旅游节点,以及等级、知名度或地理区位较强的节庆旅游节点呈现出强蜂聚效应,以上条件均不强的节庆旅游节点仅发生弱集聚效应。     

中心地体系中的分形和分维

中心地体系中蕴含着分形结构,具有多分维特征。本文借助koch雪花和随机Sierpinski图形揭示了中心地k=3体系和k=4体系的生成机制,提出了城乡聚落体系和城市-交通网络的两种分形模型,这些模型的分维与S.Arlinghaus的发现具有对应性。     

数字化时代的城市与区域发展构想

随着计算机网络的出现,人类的生产、生活开始进入了所谓的数字化时代。一个新的数字化空间正开始改变着我们所生活的城市和地球。本文首先探讨了数字化对人类活动的影响,其次分析了数字化时代城市与区域发展动力的改变、城市与区域空间结构变化以及一些新的空间现象,最后对数字化时代的城市与区域发展战略提出了相应的对策。     

基于网络分析的交通网络评价及其与区域经济发展关系研究

以网络分析为基础,使用节点连通性和可达性等指标,评价研究甘肃省的交通网络以及交通网络与区域经济发展之间的内在关系,提出了平均经济--网络直径概念、功能及其计算方法。研究结果表明,节点连通性和可达性指标与区域经济发展水平具有密切的相关性,且跨区域交通对区域经济发展的贡献率大于仅邻域交通对区域经济发展的贡献率;使用节点连通性和可达性指标可界定出各区域经济之间的空间相互作用范围,为整个区域的交通规划和经济区划提供有力的科学依据;甘肃省交通呈聚团模式,具有空间自相关性。     

“中国文物保护学术交流网”的创办思想

本主要介绍了中国物保护学术交流网的设想。     

经济地理学视角下创新网络研究进展

借助Citespace软件，回顾相关文献，系统梳理了经济地理学领域创新网络的研究脉络、研究内容，明晰研究不足与研究方向。创新网络研究重点与研究方向：①网络空间尺度方面，已有研究关注集群内与集群间网络、城市内与城市间网络（城市群网络）、跨国公司全球网络配置等问题；未来研究应从单一尺度向多尺度网络耦合研究转变，从单一网络向多重网络融合研究转变。②网络演化及其驱动因素方面，节点演变、多维邻近性对网络演化的影响成为研究重点，未来应重视对产业和技术网络轨迹演变的研究。③网络结构及其对创新的影响方面，已有研究关注节点网络结构如何影响个体创新行为与创新结果，未来应深化整体网络结构和连接原因，以及网络组成对整体网络演化影响的研究。未来应加强对中国欠发达地区、中国后发跨国公司创新网络的实证研究，强化计量方法的应用，例如块模型、社区发现等方法。