基于层次分析法的秦岭地区大熊猫栖息地质量评价   总被引：6，自引：0，他引：6  

李军锋  李天文  金学林  刘学军  汤国安 《山地学报》2005,23(6):694-701

栖息地是大熊猫存在与否的决定因素，栖息地保护的重要性远比对大熊猫个体的保护更加重要，这是保护大熊猫必须采取的长远措施。以陕西省第三次大熊猫调查数据为基础，首先确立了影响大熊猫栖息地质量的7个指标：森林起源，乔木郁闭度，灌木盖度，竹子生长状况，竹子盖度，坡度和坡向，然后采用层次分析法计算所确立的7个评价指标的权重，并结合GIS空间叠置分析方法对7个评价指标进行叠加，获得了洋县大熊猫栖息地质量分级图。得到了以下结论：最适宜区和适宜区主要分布在调查区的东北部，不太适宜区和不适宜区分布在调查区的西部，并且自东向西逐渐变差。整体而言，调查区内大熊猫栖息地质量状况良好，适宜大熊猫的生存与繁衍。  相似文献   

作业层过程控制的理解及体会     

王茂林 《现代测绘》2007,30(6):31-32

从“测前、测中、测后”三个环节，阐述了贯彻ISO9001-2000标准的过程控制要求，实施全程监控，从而确保产品质量，增强了顾客的满意度。  相似文献   

外来饮食文化影响下广州本地居民地方身份建构过程的代际差异   总被引：2，自引：1，他引：1  

罗秋菊  丁绍莲  潘珂 《地理研究》2018,37(9):1762-1774

伴随着地理学的文化转向以及“身体”“情感”视角的引入,饮食文化的空间问题开始引发人文地理学界的关注。借助身份建构过程模型理论（identity process theory, IPT）,依托对38位广州本地人的深度访谈,阐释外来饮食文化对其身份建构过程的影响及代际差异。研究发现,外来饮食文化的涌入引发了老一辈广州人多重的身份危机感,激发他们投身于地方传统饮食文化复兴实践,以对传统的忠诚和坚守来建构其地方身份。而自幼就被外来及本土饮食文化共同包围的年轻人则善于在不同情境下采纳不同文化态度和策略来建构其地方身份,缓解身份危机。该代际差异折射出饮食文化空间政治结构的轮回,而恰恰是这一空间政治的轮回孕育了地方饮食文化的继替。  相似文献   

Whose Norms Prevail? Policy Networks,International Organizations and “Sustainable Forest Management”     

Fred Gale  Timothy Cadman 《社会与自然资源》2014,27(2):170-184

This article investigates the origin of international norms, arguing that one pathway is via the strategic action of sector-specific policy networks. Evidence is adduced from an examination of the contested norm of sustainable forest management (SFM). It is argued that a Canadian forestry policy network, under pressure internally and externally to demonstrate its environmental and social credentials, promoted an “economistic” SFM norm in regional negotiations known as the Montreal Process. The article outlines the policy network approach, applies it to the Canadian forest sector, and analyzes how a policy network centered in the Canadian Forest Service and the Canadian Council of Forest Ministers worked to have the network's preferred conception of SFM internationally endorsed. The article highlights the importance of investigating which social actors champion which international norms and encourages reflexive policymaking by calling into question the degree to which international norms actually reflect a genuine global consensus.  相似文献   

Structural Topology Design of Container Ship Based on Knowledge-Based Engineering and Level Set Method     

崔进举  王德禹  史琪琪 《海洋工程》2015,29(4):551-564

Knowledge-Based Engineering (KBE) is introduced into the ship structural design in this paper. From the implementation of KBE, the design solutions for both Rules Design Method (RDM) and Interpolation Design Method (IDM) are generated. The corresponding Finite Element (FE) models are generated. Topological design of the longitudinal structures is studied where the Gaussian Process (GP) is employed to build the surrogate model for FE analysis. Multi-objective optimization methods inspired by Pareto Front are used to reduce the design tank weight and outer surface area simultaneously. Additionally, an enhanced Level Set Method (LSM) which employs implicit algorithm is applied to the topological design of typical bracket plate which is used extensively in ship structures. Two different sets of boundary conditions are considered. The proposed methods show satisfactory efficiency and accuracy.  相似文献   

攀西地区森林康养指数综合分析     

郑自君  袁东升  房鹏  王建嫱  莫芳  朱家宁 《气象科技》2021,49(5):815-822

采用文献研究法、专家打分法和层次分析法,对攀西地区温度、湿度、海拔高度、绿化度、空气质量等森林康养指标进行分析,构建了森林康养指标的评价体系。结果表明:温度和空气质量在森林康养的各指标中影响占比最高;攀西地区空气污染物少,空气质量较好,绿化度较高,温度、湿度舒适,海拔高度适合人类最佳宜居;用ArcGis软件对攀西地区进行康养分级区划,一级康养区域分布在攀枝花的东区、西区、仁和、盐边、米易,凉山的德昌、宁南、西昌、会理、会东、盐源以及木里的河(江)谷地带或低海拔地区,是养老、病后康复和疾病疗养的首选之地,与国内城市如昆明、三亚等地比较更具康养优势。研究结果可为攀西地区森林康养产业的可持续发展提供必要的科学依据。  相似文献   

A Comprehensive Model for Evaluating Coalbed Methane Reservoirs in China   总被引：3，自引：0，他引：3  

YAO Yanbin  LIU Dameng  TANG Dazhen  HUANG Wenhui  TANG Shuheng  CHE Yao 《《地质学报》英文版》2008,82(6):1253-1270

Coalbed methane reservoir （CBMR） evaluation is important for choosing the prospective target area for coalbed methane exploration and production. This study aims at identifying the characteristic parameters and methods to evaluate CBMR. Based on the geological surveys, laboratory measurements and field works, a four-level analytic hierarchy process （AHP） model for CBMR evaluation is proposed. In this model, different weights are prioritized and assigned on the basis of three main criteria （including reservoir physical property, storage capacity and geological characteristics）, 15 sub-criteria, and 18 technical alternatives; the later of which are discussed in detail. The model was applied to evaluate the CBMR of the Permo-Carboniferous coals in the Qinshui Basin, North China. This GIS-based fuzzy AHP comprehensive model can be used for the evaluation of CBMR of medium-high rank （mean maximum vitrinite reflectance 〉0.5 %） coal districts in China.  相似文献   

地下水污染防治区划研究     

杨磊  黄敬军  陆徐荣 《江苏地质》2014,38(2):298-301

以某地区地下水污染调查成果为基础,基于地下水资源的自然属性和社会属性,建立了由1个目标层、2个属性层、3个准则层、6个约束层和12项指标构成的地下水污染防治区划指标体系。利用层次分析法确定指标权重,采用加权平均综合指数模型计算区划指数,并借助MapGIS技术进行相关数据处理和区划结果可视化表达。区划结果符合地下水污染预防为主与分区防治的原则。  相似文献