共查询到20条相似文献，搜索用时 15 毫秒
1.
《The Professional geographer》2013,65(1):37-49
This paper surveys some recent developments in time series econometrics and examines to what degree they might have useful analogs in spatial econometrics. Spatial analogs of stationary vector autoregression models might be useful in modeling groups of spatial series, but the literature on non-stationarity and cointegration does not have a useful purely spatial analog. With the exception of some special cases, pure spatial series cannot be integrated processes. However, cointegration might apply to space-time processes. Space-time cointegration and Granger causality methods are developed and applied to explaining reductions in sulfur emissions in Europe. 相似文献
2.
TATSUYA WATANABE NORIKAZU MATSUOKA HANNE H. CHRISTIANSEN 《Geografiska Annaler: Series A, Physical Geography》2012,94(4):445-457
Arctic tundra surfaces are dominated by a variety of patterned ground forms. Whereas a large number of studies have described morphology, structure and processes of patterned ground, few have monitored detailed patterned ground dynamics and subsurface environments continuously. We applied electrical resistivity tomography (ERT) to understand near‐surface conditions of two types of patterned ground, ice‐wedge polygons and mudboils in Svalbard, where periglacial processes associated with permafrost are intensively monitored. Automated monitoring shows surface movement characterized by annual cycles of frost heave and thaw settlement, the amounts and rates of which are influenced by the intensity of ice segregation. A time series of ERT shows (1) a distinct resistivity boundary delimiting the active‐layer depth, (2) seasonal variation in resistivity controlled by thermo‐hydrological dynamics and (3) spatial variation in resistivity reflecting desiccation in summer and intensive ice segregation in winter. These results demonstrate ERT as a useful complementary technique for monitoring active‐layer depths and near‐surface hydrological conditions at periglacial patterned ground sites, where automated soil thermal and moisture measurements are limited. 相似文献
3.
环境污染与经济增长之间关联性的理论分析和计量检验 总被引：30，自引：1，他引：29
基于环境-经济的简单理论模型利用跨期消费选择问题最优化求解和稳态方法分析了环境污染与经济增长之间的长期关系和短期关系。这将为环境污染与经济增长之间长期和短期关系的经验研究提供理论依据和技术支持。基于EKC假设,我们对中国1960~2000年人均CO2排放量与人均GDP之间的长期关系和短期关系进行实证研究,结果表明人均CO2排放量与人均GDP之间存在长期协整关系,呈现倒U型的环境库兹涅茨曲线关系,而在短期上,人均GDP单向正向Granger影响人均CO2排放量,反过来未发现人均CO2排放量对人均GDP有明显的影响关系。 相似文献
4.
Advancing ecotones, such as treelines and frontiers of human settlement, may share some characteristic dynamics because both include feedbacks between spatial pattern and process. Both might be examined as complex, self‐organizing systems in terms of complexity theory and thus be usefully compared. A cellular automaton of advancing alpine treeline in Montana shows attractors in power‐law frequency distributions of spatial and temporal pattern. Frontiers of study areas in the Amazonian region of Ecuador, analyzed using change detection of Landsat Thematic Mapper imagery, have power‐law distributions of advancing deforestation. Alternative approaches in self‐organized complexity, including self‐organized percolation, and the inverse cascade model, and an approach to complexity involving optimization, highly optimized tolerance, are considered. Some combination of these, based on their common ancestry in percolation theory (with its ties to geocomputation), might provide insights into population‐environment interactions at settlement frontiers and ecotones together, given comparisons drawn between the spatial feedbacks at alpine treeline and in Ecuador. GIScience and landscape ecology can develop synergies by building on this area of geocomputation and complexity theory, as in analysis of attractors in state spaces of spatial metrics from spatially explicit simulations and representing their uncertainty. 相似文献
5.
The Triassic Moenkopi Formation in the Salt Anticline Region, SE Utah, represents the preserved record of a low‐relief ephemeral fluvial system that accumulated in a series of actively subsiding salt‐walled mini‐basins. Development and evolution of the fluvial system and its resultant preserved architecture was controlled by the following: (1) the inherited state of the basin geometry at the time of commencement of sedimentation; (2) the rate of sediment delivery to the developing basins; (3) the orientation of fluvial pathways relative to the salt walls that bounded the basins; (4) spatially and temporally variable rates and styles of mini‐basin subsidence and associated salt‐wall uplift; and (5) temporal changes in regional climate. Detailed outcrop‐based tectono‐stratigraphic analyses demonstrate how three coevally developing mini‐basins and their intervening salt walls evolved in response to progressive sediment loading of a succession of Pennsylvanian salt (the Paradox Formation) by the younger Moenkopi Formation, deposits of which record a dryland fluvial system in which flow was primarily directed parallel to a series of elongate salt walls. In some mini‐basins, fluvial channel elements are stacked vertically within and along the central basin axes, in response to preferential salt withdrawal and resulting subsidence. In other basins, rim synclines have developed adjacent to bounding salt walls and these served as loci for accumulation of stacked fluvial channel complexes. Neighbouring mini‐basins exhibit different styles of infill at equivalent stratigraphic levels: sand‐poor basins dominated by fine‐grained, sheet‐like sandstone fluvial elements, which are representative of nonchannelised flow processes, apparently developed synchronously with neighbouring sand‐prone basins dominated by major fluvial channel‐belts, demonstrating effective partitioning of sediment route‐ways by surface topography generated by uplifting salt walls. Reworked gypsum clasts present in parts of the stratigraphy demonstrate the subaerial exposure of some salt walls, and their partial erosion and reworking into the fill of adjoining mini‐basins during accumulation of the Moenkopi Formation. Complex spatial changes in preserved stratigraphic thickness of four members in the Moenkopi Formation, both within and between mini‐basins, demonstrates a complex relationship between the location and timing of subsidence and the infill of the generated accommodation by fluvial processes. 相似文献
6.
Galuh Syahbana Indraprahasta Ben Derudder Delik Hudalah 《Singapore journal of tropical geography》2019,40(2):219-238
Ever‐changing spatial divisions of labour have led to an altered integration of many developing countries into global production networks (GPNs), leading to new spaces of territorial development in these countries. Against this background, this paper examines the role of local institutional actors in co‐shaping territorial development driven by global industrial relocation. Drawing on the case of Bekasi District, Indonesia, this paper nuances the notion of ‘strategic coupling’ in specific national and local settings of developing countries. Drawing on empirical material obtained through a series of in‐depth interviews conducted between 2012 and 2016, our analysis reveals that although local institutional actors have participated in Bekasi District's territorial development processes they sometimes exhibit a hesitant and less‐than‐creative attitude in this participation. Meanwhile, non‐local actors, most notably private developers and central government agencies, tend to have a more significant leverage in these development processes at the local level, suggesting complex institutional arrangements in tying Bekasi District's assets with GPNs. 相似文献
7.
KLAUS DODDS 《Geographical review》2011,101(1):88-105
Generic action‐thriller films, especially The Bourne Ultimatum, the last in a series of three films, provide a useful resource for examining the gendered nature of geopolitics, the specification of place, and the role of geosurveillance in post‐9/11 national security. Using the dialogue of the film as key source material, I show how the private world of Jason Bourne, an assassin, is interwoven with the public sphere of international security, including covert operations: The personal is geopolitical. I conclude with some reflections on how we might use film as a critical pedagogical resource. 相似文献
8.
Geographic variations in spatial accessibility to public resources, such as health care services, raise important questions about the efficiencies and inequities of the processes that determine where these services are located. Spatial accessibility can be measured many different ways, but many of methods in use today involve some measure of travel cost (in time or distance). In this study we explore a simple methodological question: how much are models of spatial accessibility influenced by the precise metric of travel cost? We address this question by comparing spatial accessibility to primary care physicians for two different methods of calculating travel cost (in time) on a street network: free-flow travel time and congested with turn penalties travel time—which augments free-flow travel times with the burden of traffic congestion and traffic intersection controls. We consider the effect of these two metrics of travel cost on a gravity-based measure of spatial accessibility to primary health care services in Edmonton, Alberta, Canada. Our results suggest that while travel times between locations of demand and locations of primary care providers greatly differ based on how travel cost is calculated, the gravity-based measure of spatial accessibility provides similar information for both travel cost metrics. Using congested with turn penalties travel time can be an onerous addition to the analysis of spatial accessibility, and is more useful for measuring absolute travel time rather than modeling relative spatial accessibility. 相似文献
9.
Jamie A. Peck∗ 《The Australian geographer》1990,21(1):33-52
Patterns and processes of industrial restructuring in the Australian clothing industry are examined, utilising a ‘circuits of capital’ approach in which the interrelationships between labour markets, labour processes and product markets are emphasised. Changes in product markets (where import competition is intensifying under the trade liberalisation policies of the Hawke government and where an increasingly concentrated retail sector has accrued enormous bargaining power in its dealings with clothing manufacturers) and changes in labour markets (where competition for the industry's traditional inner urban labour supply has intensified considerably) are argued to have provided the driving force behind the process of clothing industry adjustment. This process of adjustment has been characterised by: (i) increased use of outworking, which enables clothing manufacturers to reduce production costs and provides a means for new sources of home‐based labour within the urban labour market to be tapped; and (ii) the evolution of a spatial division of labour, as some of the labour‐intensive components of the industry have been relocated to non‐urban sites where a stable and plentiful labour supply is available. In contrast to experiences in Europe and the United States, there is little evidence in Australia at the present time of significant technical change nor of specialisation in the high quality/high fashion niche of the garment market. 相似文献
10.
Bo Huang Li Zhang Bo Wu 《International journal of geographical information science》2013,27(3):379-398
Understanding the complexity of urban expansion requires an analysis of the factors influencing the spatial and temporal processes of rural–urban land conversion. This study aims at building a statistical land conversion model to assist in understanding land use change patterns. Specifically, GIS coupled with a logistic regression model and exponential smoothing techniques is used for exploring the effects of various factors on land use change. These factors include population density, slope, proximity to roads, and surrounding land use, and their influence on land use change is studied for generating a predictive model. Methods to reduce spatial autocorrelation in a logistic regression framework are also discussed. Primarily, an optimal sampling scheme that can eliminate spatial autocorrelation while maintaining adequate samples to allow the model to achieve the comparable accuracy as the spatial autoregressive model is developed. Since many of the previous studies on modeling the spatial complexity of urban growth ignored temporal complexity, a modified exponential smoothing technique is employed to produce a smoothed model from a series of bi‐temporal models obtained from different time periods. The proposed model is validated using the multi‐temporal land use data in New Castle County, DE, USA. It is demonstrated that our approach provides an effective option for multi‐temporal land use change modeling and the modeling results help interpret the land use change patterns. 相似文献
11.
Stefano Malatesta 《Geographical review》2013,103(4):537-555
The study of flood hazard has been a key theme within the spatial analysis of natural hazards. A number of authors have expanded on this tradition by adopting a society‐oriented approach to risk perception. Thus a new framework has become available for exploring social response to risk and describing the relationship between human communities and hazards in terms of contemporary interpretative categories such as social representation and “stigmatization,” the latter defined as the process by which media and social actors mark places affected by disastrous events as dangerous and unsafe sites. This literature has made a vital contribution to the geographical reading of flood hazard, showing how flood risk generates both space‐ and place‐making processes. In this paper I discuss the relationship between these two processes, suggesting that the political response to flood hazard may be viewed as a hetero‐directed strategy that influences place‐making at a local level. I illustrate this perspective using a field research conducted in 2006–2007 on the Po River Basin in Piemonte, an Italian region with high flood risk that has been affected by a series of events in recent decades. 相似文献
12.
京津冀地区经济发展的空间溢出效应 总被引：4，自引：1，他引：3
在实施京津冀协同发展战略的背景下,将修正的Conley-Ligon模型与空间马尔可夫链分析法相结合,探讨了京津冀县域经济发展过程中的溢出效应空间格局及其对经济水平空间格局演变的影响。研究发现：2000-2013年,京津冀地区的县域间存在显著的空间溢出效应,溢出效应在空间上呈现出与经济发展水平和空间距离紧密相关的具有梯次性特征的核心-外围结构,经济发达的地区发出正向溢出效应的同时也获取了正向溢出效应,但总体上县域溢出效应的类型以负向溢出为主;受溢出效应的空间格局和以负向溢出为主要类型的影响,京津冀县域经济水平类型发生转变的概率较小,经济水平较低的县域难以发生类型的转移,经济水平类型发生转移的县域多分布在地级以上城市市辖区的邻接地带;在邻接县域间显著的空间溢出效应作用下,相邻县域的经济水平类型的转移具有显著的同向性特征。 相似文献
13.
Tasks,Strategies, and Cognitive Processes Associated With Navigational Map Reading: A Review Perspective* 总被引：2，自引：0，他引：2
Amy K. Lobben 《The Professional geographer》2004,56(2):270-281
All geographers use and may create maps in their professional activities. While perceived by some as merely tools to present spatial information, maps are actually complicated communication mechanisms. Many geographers spend tremendous amounts of time learning about verbal and written communication (how to speak, listen, read critically, and write effectively). But to many, one of the basic tools of geographic communication, the map, is a general source of unknown. Many previous papers have focused on how to create effective maps; this paper focuses on how people read and use navigation maps. Everyone completes map‐reading tasks, uses (often different) strategies, and processes information through cognitive processing. Geographers may benefit from understanding how they, as well as their map‐viewing public, process the information contained on their maps. This paper addresses terms and issues addressed in navigational map reading, specifically including tasks and strategies as well as the governing cognitive processes. 相似文献
14.
《地理学报(英文版)》2016,(8)
Based on a large number of domestic literature reviews with related research abroad, academic standards and issues awareness have been intensified in domestic tourism geography, disciplinary consciousness and innovation enhancement. Hence, some valuable achievements have been made in the areas of tourism resources, tourism regional system, the spatial structure of tourism, tourism flow, ecotourism, tourism industry, tourism planning and tourism impacts, which strengthened the traditional advantages of research, expanded new areas of research and made research trends diverse. Meanwhile, with innovation of research methods, tourism geography in China is getting more and more internationally-oriented and reflecting Chinese characteristics. Research trends of China's tourism geography are prospected: 1) Catering to national strategic needs, persisting problem-oriented, strengthening the metatheoretical research, and building Chinese "localization" of theory of tourism geography and method system. 2) Introducing and assimilating foreign theories and research methods, while focusing on explaining new tourism phenomena and problems in the domestic socio-economic background. 3) Concerning about the new regional spatial processes of demographic process, social process, and spatial process in new tourism trend. 4) Exploring interactive process and mechanism of man-land relationship and new models to develop territorial space under the tourism impacts. 5) Exploring important research issues of tourism geography in global, national, regional and local scales, from the point of view of spatial differentiation, scale transformation, interaction of man and nature, creating tourism geography interpretation system based on "process-structure-mechanism" of China. 6) Building theoretical system actively, while strengthening application-oriented research, and focusing on tourism poverty alleviation, tourism and heritage protection, national parks' construction and other hot issues. Faced with econometrics research boom, we should return to rational thinking, using big data scientifically, while paying attention to the important role of qualitative evaluation in future research. 相似文献
15.
Fields as found in the geosciences have properties that are not usually found in other disciplines: the phenomena studied are often three‐dimensional (3D), they tend to change continuously over time, and the collection of samples to study the phenomena is problematic, which often results in highly anisotropic distributions of samples. In the geographical information system (GIS) community, raster structures (voxels or octrees) are the most popular solutions, but, as we show in this paper, they have shortcomings for modelling and analysing 3D geoscientific fields. As an alternative to using rasters, we propose a new spatial model based on the Voronoi diagram (VD) and its dual the Delaunay tetrahedralisation (DT), and argue that they have many advantages over other tessellations. We discuss the main properties of the 3D VD/DT, present some GIS operations that are greatly simplified when the VD/DT is used, and, to analyse two or more fields, we also present a variant of the map algebra framework where all the operations are performed directly on VDs. The usefulness of this Voronoi‐based spatial model is demonstrated with a series of potential applications. 相似文献
16.
Landscapes change in complex ways, creating surface patterns reminiscent of forms seen through a kaleidoscope. On the Earth's surface, those forms are linked to, and caused by, processes that originate with bedrock‐soil‐vegetation‐atmosphere interactions. Human‐caused alterations to landscapes are additionally tied to socioeconomic processes. Evaluation of landscape‐level processes can benefit from examining (1) the influence of disturbance regimes in altering landscape patterns, (2) the importance of considering surficial processes, (3) the subtle and cryptic spatial relations that may be present, (4) the reciprocal relationships among local processes and regional consequences, (5) the increased likelihood of some land cover transitions compared to others, and (6) the special case of landscapes with long histories of human use. These are all examples of potential fruitful arenas for interactions and represent a path for expansion of landscape ecology through accommodation of a broad range of content covered by the international GIScience community. 相似文献
17.
省域经济增长与电力消费的局域空间计量经济分析 总被引：11，自引：0，他引：11
中国各个地区经济发展对电力消费需求量大且存在地域差异,不同区域间的电力需求与经济增长之间的关系十分复杂,并非能由常系数的普通最小二乘回归分析所解释.采用电力消费模型,利用局域空间计量经济学模型方法--空间变系数的地理加权回归模型,对中国省域电力消费与经济增长之间的关系进行了局域空间计量经济分析.结果发现,中国大陆30个省域的电力消费和经济增长之间表现为一种非均衡的联动关系和局域性特征,制定差异化的区域电力消费调控政策是非常必要的. 相似文献
18.
在华跨国公司研发投资集聚的空间溢出效应及区位决定因素——基于中国省市数据的空间计量经济研究 总被引：4，自引：2，他引：2
研发投资的空间集聚有利于溢出知识、节约成本、降低风险、共享资源。以中国省市为空间样本,采用空间自相关Moran指数及集聚分析的空间计量经济学方法,研究了在华跨国公司研发投资的空间溢出效应及区位决定因素。结果发现,在溢出空间性等集聚内生因素作用下,中国省域跨国公司研发投资行为在空间分布上存在交互作用,表现为明显的区域投资集聚现象;在形成空间集聚的各因素中,除市场规模、人才资源等需求和供给因素外,集聚因素本身也有重要影响。 相似文献
19.
Jane Southworth Graeme S. Cumming Matt Marsik Michael W. Binford 《The Professional geographer》2006,58(4):406-420
Anthropogenic, ecological, and land‐surface processes interact in landscapes at multiple spatial and temporal scales to create characteristic patterns. The relationships between temporally and spatially varying processes and patterns are poorly understood because of the lack of spatiotemporal observations of real landscapes over significant stretches of time. We report a new method for observing joint spatiotemporal landscape variation over large areas by analyzing multitemporal Landsat data. We calculate the spatiotemporal variation of the Normalized Difference Vegetation Index (NDVI) in the area covered by one Landsat scene footprint in north central Florida, over spatial windows of 104–108 m2 and time steps of two to sixteen years. The correlations, slopes, and intercepts of spatial versus temporal regressions in the real landscape all differ significantly from results obtained using a null model of a randomized landscape. Spatial variances calculated within windows of 105–107 m2 had the strongest relationships with temporal variances (regressions with both larger and smaller windows had lower coefficients of determination), and the relationships were stronger with longer time steps. Slopes and y‐intercepts increased with window size and decreased with increased time step. The spatial and temporal scales at which NDVI signals are most strongly related may be the characteristic scales of the processes that most strongly determine landscape patterns. For example, the important time and space windows correspond with areas and timing of fires and tree plantation harvests. Observations of landscape dynamics will be most effective if conducted at the characteristic scales of the processes, and our approach may provide a tool for determining those scales. 相似文献
20.
Natural disturbances such as fires have been widely studied, but less is known about their spatial ecology than about other aspects of them. We reconstructed and mapped pre–Euro‐American fire history in a subalpine forest landscape in southeastern Wyoming, and analyzed the fires using GIS. Mean fire interval varies little with topography (elevation, aspect, slope) and is spatially autocorrelated at distances of at least 2 km. Fires often spread downslope, and spread more than expected from the north and south and less than expected from the west, under the influence of particular synoptic climatic conditions. The landscape of 1868 a.d., at the time of Euro‐American settlement, was strongly influenced by fires. However, it contained large patches of connected forest and few high‐contrast edges, unlike the modern landscape, which is fragmented by industrial forestry and roads. The spatial ecology of the natural fire regime may be a useful guide for management. 相似文献