人地系统耦合下生态系统服务与人类福祉关系研究进展与展望   总被引：3，自引：1，他引：2  

邱坚坚  刘毅华  袁利  陈澄静  黄清瑶 《地理科学进展》2021,40(6):1060-1072

21世纪以来生态系统服务退化与人类需求提升间的矛盾愈发激烈,如何有效推进生态系统服务与人类福祉的协调平衡成为当前可持续发展的核心主题.论文通过梳理生态系统服务与人类福祉关系研究的阶段演进发现,现有研究主要从服务对福祉的影响与福祉对服务的反馈切人,逐步聚焦到供需关系与空间流动、权衡/协同的利益博弈、文化服务的价值化、生态...  相似文献   

On-the-fly server-based aerial imagery management system     

Ana E.  Seguí  José L.  Lerma  Santiago  Navarro  Cristina  Portalés 《The Photogrammetric Record》2009,24(127):280-294

Aerial images are valuable products when dealing with both geospatial and geotemporal analysis. Nowadays, they are widely used for many different purposes and by an extensive public, including private companies, official administrations and individual users. Although in the past few years there has been an increasing interest in showing all kinds of geographical information on the World Wide Web, access to aerial imagery and its dissemination are still difficult and lack flexibility. This paper introduces an aerial imagery management system based on client–server principles, operated so as to allow users quick and efficient queries, processing and management of huge sets of photogrammetric imagery stored on raster servers. It is a novel product that is ready to provide image-based cartographic data available in public and private digital warehouses, facilitating all the required visualisations and queries, as well as geometric and radiometric processing on the fly. This paper shows the design, system architecture and various functionalities of the system in a real-life scenario.  相似文献   

地理信息服务的思考与探索   总被引：1，自引：1，他引：0  

王海龙  苏旭明  翁慧慧 《北京测绘》2009,(2):69-72

GIS正在从传统意义上的地理信息系统向地理信息服务发生偏转,地理信息服务已成为信息服务业中的一个重要组成部分。文中归纳总结了地理信息服务概念、技术体系、服务模式以及我国地理信息服务发展的差距、对策与建议。  相似文献   

概括平差模型的解法探讨   总被引：1，自引：0，他引：1  

史越瑶  赵鑫  卞和方 《测绘信息与工程》2009,34(3):47-48

分析了概括平差模型系数矩阵可能出现非列满秩情况的原因,研究了如何使系数矩阵为列满秩矩阵,避免了系数矩阵为非列满秩时的复杂解算过程。  相似文献   

地理空间数据自动综合方法的研究现状与发展趋势     

黄勇奇  赵追 《测绘科学》2009,34(1)

多年来人们已经报道了很多自动综合方法。这些方法确实解决了地理空间数据自动综合中的很多重要问题,但这些方法也有明显的缺陷和应用范围。本文对这些方法进行了研究,研究内容包括这些方法的分类、原理、优缺点和适用范围,并提出了今后自动综合方法的研究发展趋势。  相似文献   

地图数据缩编更新的模式分类与选择   总被引：4，自引：0，他引：4  

胡云岗  陈军  李志林  赵仁亮  陈艳红 《地理与地理信息科学》2007,23(4):22-24

地图数据缩编更新模式是缩编更新技术流程设计及软件模块开发的基础。根据缩编和更新对象的不同归纳了缩编更新的4种模式,结合当前地图自动综合理论技术水平与数据组织管理现状,认为现阶段最合理的模式为新旧数据叠加缩编更新模式。基于该模式分析道路数据缩编更新的技术流程并开发了相应的软件模块,应用于国家1∶5万地理信息系统中道路数据的更新,从而验证了该模式的可行性。  相似文献   

太原市城市复合生态系统调节服务时空格局演化及驱动机制研究   总被引：1，自引：0，他引：1  

马慧强  杨俊  李哲 《地理科学》2021,41(3):463-472

以太原市主城区为例,根据生态系统服务理论对太原不同土地利用类型所提供的正负生态系统调节服务价值分别进行测度计算,并综合分析城市复合生态系统调节服务的时空演化特征,最后,从直接原因(土地利用变化)和根本原因(空间城镇化、人口城镇化、产业空间组织与空间规划、政府相关政策与规划)2个方面,对太原市生态系统调节服务能力变化进行...  相似文献   

Explicit integration of bounding surface model for the analysis of earthquake soil liquefaction     

Konstantinos I. Andrianopoulos  Achilleas G. Papadimitriou  George D. Bouckovalas 《国际地质力学数值与分析法杂志》2010,34(15):1586-1614

This paper presents a new plasticity model developed for the simulation of monotonic and cyclic loading of non‐cohesive soils and its implementation to the commercial finite‐difference code FLAC, using its User‐Defined‐Model (UDM) capability. The new model incorporates the framework of Critical State Soil Mechanics, while it relies upon bounding surface plasticity with a vanished elastic region to simulate the non‐linear soil response. Stress integration of constitutive relations is performed using a recently proposed explicit scheme with automatic error control and substepping, which so far has been employed in the literature only for constitutive models aiming at monotonic loading. The overall accuracy of this scheme is evaluated at element level by simulating cyclic loading along complex stress paths and by using iso‐error maps for paths involving change of the Lode angle. The performance of the new constitutive model and its stress integration scheme in complex boundary value problems involving earthquake‐induced liquefaction is evaluated, in terms of accuracy and computational cost, via a number of parametric analyses inspired by the successful simulation of the VELACS centrifuge Model Test No. 2 studying the lateral spreading response of a liquefied sand layer. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

皖江中东部雾的客观预报自动化业务系统     

周述学  叶金印 《气象》1994,20(11):37-39

介绍了一种雾的客观预报方法，并研制了一个与ＳＴＹＳ接口的雾的客观预报自动化业务系统，对雾有一定的预报能力。  相似文献   

Producer Services Research in Europe*     

Antoine S. Bailly 《The Professional geographer》1995,47(1):70-74

Four directions in producer services research in Europe are identified: the economic role of producer services for urban and regional development; the location of advanced producer services; the role of regional structures and innovative “milieu”; and local development and labor markets. Issues for future research include the role of producer services in the urban structuring and/or restructuring of world cities; the relation between producer services and interregional disparities; the integration of producer services into networks; and the impacts of the liberalization of producer services.  相似文献