共查询到20条相似文献，搜索用时 15 毫秒
1.
Past,current and future drivers for the development of decision support systems in forest management
The potential for development in decision support for forest management is set by decision theory, available technology and methods. Demands for decision support are emerging from contemporary challenges and problems of forest management which act as stimuli for the science community. Objectives and approaches in forest management as well as technologies have been changing throughout history. Accordingly, the demand for tools to support planning and decision-making has evolved. In this contribution, the authors review the historic development of decision support systems (DSS) for forest management and discuss past, current and future drivers. Based on evidence from scientific literature, case studies in the frame of the Forest Management Decision Support Systems (FORSYS) action, as well as experiences of the authors some hypotheses about the future of DSS are drawn. It is shown that in the past, the drivers evolving from forest management as well as decision support technologies have influenced the way of how models and methods have been applied as well as how DSS architectures have been designed. It is concluded that in the future, the challenges for DSS development will increase, as the complexity of decision-making processes and the related models will compete with the user demands which ask for simplicity. 相似文献
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Ragnar Jonsson 《Journal of Wood Science》2006,52(2):154-162
To increase the competitiveness of wood as a building material requires knowledge of which customer needs require attention
in terms of quality improvement and/or product development to best satisfy customers. Hence, information as to the impact
on customer satisfaction of the fulfillment of different customer needs, as well as the performance of wood and substitutes
in providing for these needs, is needed. This article suggests the use of customer satisfaction modeling (CSM) for assessing
customer needs. The methodology is evaluated in the context of floorcovering. The results suggest that CSM is well suited
for extracting the information necessary for prioritizing customer needs: importance/impact and performance data for attributes
as well as for customer benefits. The study indicates the necessity of considering substitute materials not only for performance
comparisons; substitutes may also reveal otherwise latent customer needs. Practical, functional, benefits exert the greatest
impact on customer satisfaction for wooden flooring as well as its closest substitutes, laminate and carpet. Hygiene and a
low cost over the life cycle are apparently the customer benefits that require attention from wooden flooring manufacturers,
because importance is high and performance relatively low. 相似文献
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云南哀牢山自然保护区南华片区项目建设必要性分析 总被引：1，自引：0，他引：1
对哀牢山国家级自然保护区南华片区的生物多样性、经营现状和经营管理进行评价,对项目建设必要性分析结果:项目建设有利于该保护区的整体效应;有利于对珍稀植物物种和生态系统的保护;有利于对候鸟迁徙通道的保护;有利于社会经济的可持续发展;是加强科研和宣教工作的需要。最后阐述了项目建设的主要内容。 相似文献
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为方便研究生指导教师快速、准确地填写考核信息和考核单位全面、快速地掌握考核导师信息,逐步推进研究生导师考核信息化建设和管理,针对高校研究生指导教师聘期量化考核的需要,依据研究生指导教师聘期量化考核指标,以Tomcat为web服务器,Eclipse为集成开发平台,MySQL为数据库服务器,Internet Explorer为客户端,Microsoft Windows 2000为操作系统平台,采用JSP技术设计了导师聘期考核系统,探讨了研究生指导教师聘期量化考核系统的实现.其结论对高校教师考核有一定的指导作用. 相似文献
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资源昆虫可分为直接资源昆虫和间接资源昆虫.本文就茂兰保护区的资源昆虫即药用、食用、观赏、传粉、天敌等昆虫进行了初步研究,并对资源昆虫的保护与利用提出了建议. 相似文献
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介绍了药用植物大黄藤形态特征和鉴别方法.详细阐述扦插育苗、种子育苗和组织培养等大黄藤人工苗木培育、种植及采收技术. 相似文献
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About 100 million rural households in China have obtained forest property certification, which could serve as collateral to help households obtain microloans intended for forest management and investment. However, it is still difficult for households to receive these loans using forests as collateral. The strong demand for loans from the Rural Credit Cooperative cannot be met. This paper attempts to understand microloan access behavior using 241 respondents in three typical Chinese counties. It argues that the loan is determined by both the demand from the household as well as the supply from banks. Logistic regression models are used to investigate what might affect accessibility to households’ microloans. Household characteristics like age, education, income, forest characteristics as well as the regional variation of loans are used as explanatory variables. Age, education and income as well as the perception of the bank services are found statistically significant. Other findings include that only half of the respondents who received loans supposed for forest management but use for other purposes. Most importantly, it is found that joint-loan arrangement is more suitable for small-scale households and direct-loan and guaranteed-loans are better match larger property size. A simplified loan-process and discount points would lower transaction costs and improve rural households’ accessibility to microloan using of forest property collateral. 相似文献
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本文重点介绍了地板锯材或毛料的常规窑干技术，同时详细说明了地板锯材含水率基准的制定和修正。文中推荐了部分常用进口木材实木地板的窑干基准(厚度25mm)及其窑干工艺规程，供相关单位参考。 相似文献
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以橱柜待装RTA家具为例,介绍利用面向对象的设计思想构建RTA家具CAD模型类的方法,建立单元柜的类初始化和对象引用关系. 相似文献
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Eucalypt plantations 总被引：7，自引：0，他引：7
This paper reviews the historical development of the use of the eucalypt over 200 years, from its curiosity status in the botanical gardens of Europe to its extensive use as a fuelwood for the wood-burning locomotives of the national railway systems, and then to its more recent use as a major source of biomass for paper pulp, fiberboard, industrial charcoal, and fuelwood. Ecological and biological aspects of the genus Eucalyptus have made it successful as an exotic in industrial monocultures and as a multipurpose tree of benefit to small landholders. Social, policy, and economic aspects of growing Eucalyptus are examined, as are prospects for using the eucalypt in the twenty-first century as an industrial plantation tree and as a component of farming systems in the rural landscape. 相似文献
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Zhao ChenNanjing Forestry University 《林业研究》1993,4(2):103-111
Tree spars,as appropriate supports for cable yarding systems,have to beverified for the strength before any real operation.This paper gives theoretical analysisfor various cases.Tree spars without guylines are normally under heavy bending stress,which dominates the strength design.For tree spars equipped with guylines,the spardeflection follows the same way as an unguyed spar.The overload of the bending stressremains the main reason of spar failures.Several diversities of tree spars from theidealized condition are investigated for the sake of better modeling of the real situation.Analysis supports that the tree spar can generally be treated as a straight cylindricalcolumn without giving significant errors.The load can be handled as centrically applied.Design methods are provided for both guyed and unguyed tree spars,which will benefit thepractice of using tree spars as an alternative for steel spars. 相似文献
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本文以西安市三环路系统绿地景观规划设计项目为例,介绍了城市快速干道景观规划设计的分析方法、分析过程,探讨了规划设计的原则和规划设计的总体构思.文中最后还介绍了道路景观控制的基本指标和一般方法. 相似文献
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湖南林业科技创新的思考 总被引：1，自引：0，他引：1
林业科技创新应根据林业发展的特殊情况和创新要求，建立以大学、科研机构为主体的知识创新体系，以企业为主体的技术创新体系，以政府部门为主体的创新推动体系和以中介机构、学会、协会等组织为主体的中介服务体系。作者从林业创新战略、机遇和挑战、深化科技体制改革、加快林业科技创新体系建设等方面论述了自己的观点。 相似文献
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M. J. Fuhr C. Stührk B. Münch F. W. M. R. Schwarze M. Schubert 《Wood Science and Technology》2012,46(4):769-779
The visualization and the quantification of microscopic decay patterns are important for the study of the impact of wood-decay fungi in general, as well as for wood-decay fungi and microorganisms with possible applications in biotechnology. In the present work, a method was developed for the automated localization and quantification of microscopic cell wall elements (CWE) of Norway spruce wood such as bordered pits, intrinsic defects, hyphae or alterations induced by white-rot fungus Physisporinus vitreus using high-resolution X-ray computed tomographic microscopy. In addition to classical destructive wood anatomical methods such as light or laser scanning microscopy, this method allows for the first time to compute the properties (e.g., area, orientation and size distribution) of CWE of the tracheids in a sample. This is essential for modeling the influence of microscopic CWE on macroscopic properties such as wood strength and permeability. 相似文献
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在南梅加拉亚邦摈榔复合农林生态系统内,农民种有多种具有重要经济价值的植物。调查了摈榔复合农林生态系统内植物组成情况,共发现160种植物,其中木本植物83种,灌木22种,草本41种,攀缘植物14种。研究表明,摈榔复合农林生态系统为当地农民带来了经济收入,提供医药、木材、燃材和食用品以及外售。这些复合农林生态系统有利于保护重要经济价值的植物物种、保持生物多样性,并在结构组成和生态经济功能上模拟自然森林。 相似文献
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大姚县核桃产业发展对策 总被引：1，自引：0，他引：1
大姚县是中国优良核桃品种三台核桃的原产地,拥有"中国核桃之乡"之美称.文章从大姚县核桃产业发展的现状出发,分析发展的条件和存在的问题,结合发展目标,就目标实现的对策进行了分析. 相似文献