制约畜禽疫病防治因素的层次分析法研究     

马存寿王援军  贺七十三 《中国动物检疫》2001,18(7):23-24

本文通过层次分析法（Analytical Hierarchy Process,AHP)，结合门源县当前畜禽疫病防治现状，对影响畜禽病防治的制约条件进行了研究，表明群众防疫意识的淡薄和防疫费收取困难是首要制约因素，基础设施建设和队伍建设滞后居次位，监督工作较弱也不容忽视。  相似文献   

Scale of heterogeneity of forage production and winter foraging by elk and bison     

L. L. Wallace  M. G. Turner  W. H. Romme  R. V. O'Neill  Yegang Wu 《Landscape Ecology》1995,10(2):75-83

The relationship between fine-scale spatial patterns of forage abundance and the feeding patterns of large ungulates is not well known. We compared these patterns for areas grazed in winter by elk and bison in a sagebrush-grassland landscape in northern Yellowstone National Park. At a fine scale, the spatial distribution of mapped feeding stations in 30 m × 30 m sites was found to be random where there were no large patches devoid of vegetation. In areas similar to the mapped sites, the underlying spatial distribution pattern of biomass was also determined to be random. At a broad scale, forage biomass differed among communities across the northern range but forage quality did not. These results suggest that ungulates are feeding randomly within forage patches (fine scale) but may select feeding sites based upon forage abundance at broader, landscape scales. Contrary to what has been suggested in other systems, ungulates were not overmatching at finer scales.  相似文献   

乡村生态学研究的尺度与等级特征   总被引：2，自引：0，他引：2  

何念鹏  周道玮  吴泠 《干旱区资源与环境》2002,16(2):22-26

乡村生态学 ( Village ecology)的尺度和等级特征依赖一定空间区域 ,不同尺度所研究村落的特征也不尽相同 ,空间尺度的大小很大程度上决定于所研究村落的复杂性、稳定性及特征。在特定的空间尺度下 ,乡村的组成要素随着时间尺度的变化而变化 ,但变化速率受空间尺度大小的制约。乡村生态学研究具有等级结构 ,空间尺度决定所研究单元的等级位置。行政村 (中心村 )和自然村 (自然屯 )是乡村生态学研究的基本尺度  相似文献   

基于层次分析法的食用菌产业扶贫绩效评价     

冯梦龙 《中国食用菌》2020,(2):206-209

特色产业扶贫是一种创新式的扶贫模式,通过扶持贫困地区发展地方特色产业脱贫致富。食用菌营养丰富,销售市场前景乐观,也响应了我国绿色环保节能的理念,成为最具优势的产业发展趋势。辽宁省某地区作为我国脱贫攻坚战的重点地区,利用食用菌产业不断优化自身的农业结构,助力当地脱贫致富。对该地区的食用菌产业扶贫绩效进行了具体分析和评价。  相似文献   

层次分析法在庆阳市行道树选择中的应用     

穆妮妮  张彦山  张有龙 《甘肃农业科技》2015,(6):8-11

结合庆阳市立地条件与能源化工基地建设,运用层次分析法构建了庆阳市行道树综合评价体系,进行定性与定量相结合评价。评价结果表明,在庆阳市行道树的选择中以生态效益较好的法国梧桐、臭椿、银杏、国槐、桑树等为主,以常绿针叶树种侧柏、刺柏等为辅。  相似文献   

Describing Human–Wildlife Interaction from a European Perspective     

Maria Johansson  Sabrina Dressel  Emma Kvastegård  Göran Ericsson  Anke Fischer  Bjørn P. Kaltenborn 《Human Dimensions of Wildlife》2016,21(2):158-168

European researchers from both the natural and social sciences show growing interest in studying interactions between society and wildlife. A wealth of theoretical frameworks, concepts, and methods are used, but an integration of perspectives is lacking. This research note summarizes results from two workshops that included 63 delegates from 25 European countries, as well as a follow-up survey of 41 respondents. Two main theoretical approaches to the study of human–wildlife interactions were identified. One approach focuses on the collective societal level relying on theories of governance, social representation, deliberative procedures, and commons theory. The other approach targets individuals or groups, and is based on theories such as the cognitive hierarchy, theory of reasoned action, and theory of planned behavior. Interdisciplinary collaboration is needed to identify the best options for wildlife conservation and management in a more politically integrated Europe.  相似文献   

AMETHOD OF COMPREHENSIVE EVALUATION TO DEVELOPMENT PROJECT ALTERNATIVES     

Zheng Xiaoqing 《保鲜与加工》1995,(4):9-17

In view of the complication of compreliensive evaluation to development projectplanning alternatives,an AHP model for comprehensive evaluation to the alternatives is advanced,the way of determinating the weight of each index affecting the aIternatives' quality is expounded,and the general methods of evaluating the alternatives with the indexes are given.  相似文献   

Synthetic Assessment of Power Transformer Condition Based on Matter-element Theory     

XlONG Hao  SUN Cai-xin  DU Peng  DAI Yao  WANG Qian 《保鲜与加工》2006,(10):24-28

Condition assessment on power transformer is an important approach to improve reliability of transformer and provide proper decision-making for condition-based maintenance. For long, static assessment method used in the past has already not adapted to the development of modem electricity transmission and distribution technology. So based on the deficiency of fuzzy synthetic assessment method, matter-element synthetic assessment method is introduced. The method can evaluate transformer condition not only in quality but also in quantity. Because each index weight can be given fairly and fast through improved analytic hierarchy process, which need not carry on consistency chec accuracy of assessment can be improved. Examples analysis has proved that assessment method of power transformer condition based on matter-element theory is rational and effective.  相似文献   

Study and Practice of Safety Grade Assessment for Large Convention and Exhibition Centre     

ZHOU Tie-jun  LIN Ling 《保鲜与加工》2007,(3):12

This paper takes "how to estimate the complex security of Large Convention and Exhibition Centre effectively" as the research goal.Based on analyzing the difficulties,target system,technical constitution,probing into the architecture,safety science,and using for reference the mathematics,operational research,statistics and modern system theory and method,trying to explore establishing an evaluation methodological system,which is provided with integrated characters on subject.Based on these ways,it exerts "quality to quantity" fuzzy analytical hierarchy process(FAHP) and aims at discussing the safety grade assessment of the Chongqing International Conference Exhibition Center focusing on designing theories.The aim is to enhance the integration of design practice and safe consciousness,strengthen the building safety management,and perfect city public security system.In practice,it is also an efficient tool for favoring values of architectural environmental safety.  相似文献   

基于模拟退火算法的减速器多目标优化设计   总被引：6，自引：2，他引：6  

王建维  张建明  魏小鹏 《农业机械学报》2006,37(10):120-123

提出了采用模拟退火算法进行减速器参数的全局优化的方法;针对斜齿轮减速器优化设计的多参数、多目标、多约束特点,建立了多目标优化数学模型;应用层次分析法计算了各目标权重。仿真结果表明,优化参数比原设计参数的优化解要好,说明模拟退火算法用于减速器优化设计是有效、可行的。  相似文献