基于可持续性视角的建设用地适宜性评价及其应用   总被引：1，自引：0，他引：1  

喻忠磊  庄立  孙丕苓  梁进社  张文新 《地球信息科学学报》2016,18(10):1360-1373

建设用地适宜性是土地资源利用与管理决策的依据。本文基于土地利用可持续性界定建设用地适宜性内涵,从灾害风险、地形地貌、生态环境和区位条件4个维度,构建了较规范的适宜性指标体系;针对已有评价方法的不足,构建了整合极值法、条件函数法、线性加权综合的“多要素分布式算法——情景矩阵”评估框架;进而基于适宜性识别冲突空间,以空间冲突面积占总建设用地面积的比重作为空间冲突强度来刻画区域建设空间布局的合理性与可持续性。本文以新疆玛纳斯县为例开展研究,结果表明玛纳斯县适宜建设空间（达230 km²以上）约占全县总面积的26%;最适宜和比较适宜性建设用地主要分布于中部及中北部乡镇及农（团）场驻地附近,基本适宜建设区主要分布在比较适宜建设空间的外围及中南部山前平原地带;该县冲突空间达4.21 km²,占建成区面积的22.74‰;冲突空间主要分布在河流沿岸和中部城镇化发展区;南部、北部的生态脆弱区及中部工业化发展区的乡镇空间冲突强度也较高。研究表明,本文提出的建设用地适宜性评估框架与方法逼近客观现实,简单易行,能弥补以往评价方法的不足;适宜性在空间冲突分析与可持续性土地利用管理中具有较好的应用价值。  相似文献   

互锚式薄壁挡土墙影响因素分析     

李厚民  熊健民  余天庆 《岩土力学》2006,27(Z1):897-901

针对日益增多的高填方路堤,提出了一种新型的挡土墙结构--互锚式薄壁挡土墙,它具有成本低廉、结构合理、施工方便的特点,有利于保护环境,具有广泛地应用前景。在现场测试的基础上进行有限元分析,总结出拉筋应力、侧向土压力、侧向位移等指标的可能影响因素,为这种新结构的设计及优化提供了理论依据。  相似文献   

城市地下多种地质资源开发的相互影响模式研究     

周丹坤  李晓昭  马岩  葛伟亚 《高校地质学报》2020,26(2):231-240

城市地下普遍蕴藏着地下空间、地下水、浅层地热能和地质材料4 种地质资源。它们共生共存于同一地质环境系统中,彼此之间相互联系,一种资源的开发可能会对其它资源的开发潜力产生显著影响。为充分发挥地下各种资源对城市可持续发展的支撑作用,减少资源开发之间的冲突,城市地下开发的观念需要从片面的满足“一时一己”之需的单一资源开发转变为全局的多资源兼顾的协同开发。本文通过国内外文献调研,识别和概化出了9 种城市地下开发过程中地质资源相互影响的典型模式,总结出其相互影响具有互馈性、连锁性和动态变化性的特征,并列举了一些多种地质资源协同开发的典型案例,以期为城市地下开发效益的最大化提供支撑。  相似文献   

Three Types of Spatial Function Zoning in Key Ecological Function Areas Based on Ecological and Economic Coordinated Development: A Case Study of Tacheng Basin,China     

WANG Guiling  YANG Degang  XIA Fuqiang  ZHONG Ruisen  XIONG Chuanhe 《中国地理科学(英文版)》2019,(4):689-699

Three types of spatial function zoning is an effective measure for regional environmental protection and orderly development.For ecological and economic coordinated development, spatial function zones should be divided scientifically to clear its direction of development and protection. Therefore, based on ecological constraints, a beneficial discussion would be about the key ecological function areas adopting the concept of ecological protection restriction and supporting socioeconomic development for spatial function zoning. In this paper, the researchers, taking Tacheng Basin, Xinjiang of China as an example, choose township as basic research unit and set up an evaluation index system from three aspects, namely, ecological protection suitability, agricultural production suitability, and urban development suitability, which are analyzed by using spatial analysis functions and exclusive matrix method. The results showed that: 1) This paper formed a set of multilevel evaluation index systems for three types of spatial function zoning of the key ecological function areas based on a novel perspective by scientifically dividing Tacheng Basin into ecological space, agricultural space, and urban space,which realized the integration and scientific orientation for spatial function at the township scale. 2) Under the guidance of three types of spatial pattern, the functional orientation and suggestions of development and protection was clearly defined for ecological protection zones,ecological economic zones, agricultural production zones, and urban development zones. 3) A new idea of space governance is provided to promote the coordinated and sustainable development between ecology and economy, which can break the traditional mode of thinking about regional economic development, and offers a scientific basis and reference for macro decision-making.  相似文献   

创新区域中心城市旅游联动发展模式——以武汉、长沙、南昌三市为例   总被引：1，自引：0，他引：1  

黄细嘉 《地域研究与开发》2007,26(6):79-83

在我国"中部崛起"的发展战略决策中,组合武汉、长沙、南昌三省会城市,开展区域中心城市旅游发展联动合作,共同构建长江中游旅游金三角地带,打造具有国际影响的著名旅游目的地,最终形成"华中旅游极",是中部地区旅游业发展和崛起的重要战略举措.三市进行区域旅游合作,除了采取传统的普遍意义上的合作形式,更重要的是创新区域旅游联动发展的合作形式,共同建立区域联动的板块发展、区域定位的地域分工、点圈结构的多边合作、互为目的地的市场互动、科学融资的资本促动等多元合作方式和多样合作模式.但真正要开展实质性的合作,还要通过制定三市区域旅游合作发展规划,确立"内联外拓"的发展战略,设置综合性或专门性的公共信息或旅游信息交换平台,建立人才培育的合作交流机制,构建合作的保障体系.  相似文献   

街道渐进式选取的信息传输模型   总被引：2，自引：0，他引：2  

田晶  艾廷华 《武汉大学学报(信息科学版)》2010,(4)

提出了街道渐进式选取的信息传输模型,该模型包含两个关键部分,代表街道网信息的信源和代表如何选取的信道。定义了街道网几何信息与拓扑信息的新的度量方法,根据匹配思想建立了信道,并对信道的地图综合意义进行了解释。  相似文献   

粤港澳区域文化综合体形成刍议   总被引：6，自引：0，他引：6  

许桂灵  司徒尚纪 《地理研究》2006,25(3):495-506

区域文化综合体作为文化存在的一种空间形式,由文化景观结构、文化区域结构和文化中心等有机结合而成。本文根据文化梯度概念,运用文化空间演化的原理和方法,在分析粤港澳文化形成的地缘、史缘、族缘关系及其文化作用的基础上,阐述珠江三角洲广府文化核心区、香港区域文化、澳门区域文化形成的历史演变过程及各自特质和风格,通过三地长期文化互动,包括城市建筑、风俗、语言、文学艺术、思想、宗教、价值观念等文化要素不断交流、碰撞和创新,形成以中西文化交融和三地空间有机结合,穗港澳三个文化中心并立为特征的区域文化综合体。  相似文献   

Wavelet–copula‐based mutual information for rainfall forecasting applications     

Zakari Seybou Abdourahamane  Reşat Acar  Şenocak Serkan 《水文研究》2019,33(7):1127-1142

Under a climate change, the physical factors that influence the rainfall regime are diverse and difficult to predict. The selection of skilful inputs for rainfall forecasting models is, therefore, more challenging. This paper combines wavelet transform and Frank copula function in a mutual information‐based input variable selection (IVS) for non‐linear rainfall forecasting models. The marginal probability density functions (PDFs) of a set of potential rainfall predictors and the rainfall series (predictand) were computed using a wavelet density estimator. The Frank copula function was applied to compute the joint PDF of the predictors and the predictand from their marginal PDFs. The relationship between the rainfall series and the potential predictors was assessed based on the mutual information computed from their marginal and joint PDFs. Finally, the minimum redundancy maximum relevance was used as an IVS stopping criterion to determine the number of skilful input variables. The proposed approach was applied to four stations of the Nigerien Sahel with rainfall series spanning the period 1950–2016 by considering 24 climate indices as potential predictors. Adaptive neuro‐fuzzy inference system, artificial neural networks, and random forest‐based forecast models were used to assess the skill of the proposed IVS method. The three forecasting models yielded satisfactory results, exhibiting a coefficient of determination between 0.52 and 0.69 and a mean absolute percentage error varying from 13.6% to 21%. The adaptive neuro‐fuzzy inference system performed better than the other models at all the stations. A comparison made with KDE‐based mutual information showed the advantage of the proposed wavelet–copula approach.  相似文献   

广西与邻省矿产供需状况及矿业互补性探讨     

李永球 《南方国土资源》1999,12(2):49-54

文章根据矿产资源特点、矿产供需状况提出了广西可从邻省引进８种矿产资源为广西经济建设服务,同时广西９种矿产资源可弥补邻省对矿产资源需求的不足。  相似文献   

Dimensionality reduction in drought modelling     

João Filipe Santos  Maria Manuela Portela  Inmaculada Pulido‐Calvo 《水文研究》2013,27(10):1399-1410

For monitoring hydrological events characterized by high spatial and temporal variability, the number and location of recording stations must be carefully selected to ensure that the necessary information is collected. Depending on the characteristics of each natural process, certain stations may be spurious or redundant, whereas others may provide most of the relevant data. With the objective of reducing the costs of the monitoring system and, at the same time, improving its operational effectiveness, three procedures were applied to identify the minimum network of rain gauge stations able to capture the characteristics of droughts in mainland Portugal. Drought severity is characterized by the standardized precipitation index applied to the timescales of 1, 3, 6 and 12 consecutive months. The three techniques used to reduce the dimensionality of the network of rain gauges were as follows: (i) artificial neural networks with sensitivity analysis, (ii) application of the mutual information criterion and (iii) K‐means cluster analysis using Euclidean distances. The results demonstrated that the best dimensionality reduction method was case dependent in the three regions of Portugal (northern, central and southern) previously identified by cluster analysis. All the reduction techniques lead to the selection of a subset of rain gauges capable of reproducing the original temporal patterns of drought. For specific severe drought events in Portugal in the past, the comparison between drought spatial patterns obtained with the original stations and the selected subset indicated that the subset produced statistically satisfactory results (correlation coefficients higher than 0.6 and efficiency coefficients higher than 0.5). Copyright © 2012 John Wiley & Sons, Ltd.  相似文献