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Consequently, to evaluate forest sustainability of a certain region becomes important in sustainable forestry and sustainable development. Forest carrying capacity is an important and key index in evaluating forest sustainability, premise of forest management and decision-making, and an essential component of the theories in sustainable forestry and forest management and forest ecosystem.

因此,如何评价一个确定区域的森林是否可持续便成为可持续林业、可持续发展研究中亟待解决的重要问题,而森林承载力是森林可持续性评价中的一个重要的关键的指标,是制定和实施区域可持续林业发展规划、战略的前提,是区域森林经营管理决策的依据,同时它也是可持续林业理论的重要组成部分,是森林经营管理理论和森林生态学中的一个全新内容。

The result indicates that the water, tundra, residential sites, needle-leaved forest and brass were decreased from 1977 to 1985; while the plantation and the coniferous and broad-leaved mixed forest obviously increased; and the broad- leaved forest, betula ermanil forest, road and bare soil also increased. During 1985 to 1999, the water, bare soil, coniferous and broad-leaved mixed forest, broad-leaved forest reduced, the rest landscape types increased in this area.

分析表明:从景观面积变化率来看,1977~1985年间,水体、苔原、居民点、针叶林和草地的面积减少,耕地和针阔混交林的面积增加显著,阔叶林、岳桦林、道路、裸地增加;1985~1999年间,水体、裸地、针阔混交林和阔叶林的面积减少,其他类型面积增加。

The four models were analyzed and normalized. We studied the procedure and method of building forest fire model base. Model base was build by object-oriented method based on category of model. Forest fire spreading models algorithm were implemented. We designed model dictionary base, model file base, and model knowledge base. Model base administration and maintenance functions were developed and implemented model file management, parameter management and knowledge management. The problems of interface between of model base and database were solved by means of model data control files. Model base ensured the availability of supporting for forest fire model suitability selection technology and forest fire model self-adapting updating technology.(3) Based on BP artificial neural network, we designed a frame construction of forest fire model selection of suitability. Forest fire model selection knowledge was produced through BP artificial neural network.

2建立了林火模型库建设的林火蔓延模型评价标准,根据模型评价标准和试验区实际情况,在42个林火蔓延模型中选择了目前最具有影响力和最具有典型代表性的Rothermel模型、王正非模型、加拿大模型和澳大利亚模型进行了解析和归一化处理;对林火模型库的建库过程和方法进行了研究,在林火模型分类基础上,采用面向对象的模型库表示方法建立了林火模型库;实现了林火蔓延模型算法,设计了模型字典库、模型文件库和模型知识库;开发了模型库管理与维护功能,实现了模型的文件管理、参数管理和知识管理;通过模型数据管理文件解决了模型库与数据库之间接口问题;实现了林火模型库对林火模型适宜性选择和林火模型自适应修正技术的有效支持。

I made Milk,Milk Shinny,Cream,Rhapsodized,Metal Enhanced,iTuned skins for Savanna and Savanna Roots…and also some other skins for KKMenu.

Savanna 和 Savanna Roots 的 Milk,Milk Shinny,Cream,Rhapsodized,Metal Enhanced,iTuned 风格的外观…还有一些其他的 KKMenu 皮肤。

Department of forest sciences is primarily dedicated to education and research in forest sciences including developing forest ecosystem management, improving forecasts of forest growth and yield, designing cost-effective forest regeneration practices, natural resources management, biometeorology, soil microbiology and biochemistry, horticulture and agronomy, animal science.

森林科学系主要致力于森林科学的教育及研究,其科学领域包括发展中的森林生态系统管理,改良森林生长和生产量的预测,森林重建实践的成本有效设计,自然资源管理,生物气象学,土壤微生物学和生物化学,园艺和农学,动物科学。

To study the effect of nematode-induced forest succession on avian communities, we chose three forest types at different seral stages, including evergreen broad-leaved coppice infested by the pine wood nematode for five years and evergreen broad-leaved forest infested for 12 years, both from Xiangshan County, Zhejiang, and one 40-year-old evergreen broad-leaved forest from Tiantong National Forest Park, Zhejiang.

为了探讨在松材线虫侵袭所引起的森林演替过程中植被结构变化对鸟类群落的影响,我们研究了这此常绿阔叶演替林中的鸟类群落结构。2004年5-6月,我们在浙江省宁波市选择了分别处于3个不同演替阶段的7个样地:包括象山县被松材线虫侵袭5年后的常绿阔叶灌丛和侵袭12年后的常绿阔叶林样地各3个,同时在天童国家级森林公园选择了约40龄的常绿阔叶林样地1个。

According to the present situations of protected area in China and referring to the definition and category abroad, we suggested the forest natural protected area mainly include three types as follow: Nature Reserves (NR; types of forest eco-system), Forest Parks and Public Welfare Tree Farm. Researches of evaluation on ecotourism resources of forest natural protected area focused on two aspects basically: to appraise and account the ecotourism resources monetarily from the standpoint of pure economics; to assess the exploitability of ecotourism resources based on the theories of conservation biology and ecology, in which finding the reasonable equilibrating point between protection and: utilization was emphasized. On the studies of development pattern of forest ecotourism resources, it is necessary to deal with the relationship between protection and exploitation correctively, namely to put the protection as the first consideration and balance the "Tree r.1ajor Benefits" so that prompting the virtuous circle afforest ecotourism.

根据我国自然保护地的实际情况,参考国外自然保护地的定义与分类方式,可认为我国的森林自然保护地主要应主要包括森林生态系统类型自然保护区、森林公园及公益林场三种类型;森林自然保护地的生态旅游资源评价研究主要集中在两方面:一是单纯地从经济学角度对旅游资源游憩价值进行货币化评价与核算,二是从保护生物学和生态学角度对资源的可开发性进行评价,其侧重在于找到保护与开发的的科学平衡点;在森林自然保护地旅游资源的开发模式研究上,必须正确处理开发与保护的关系,把保护放在第一位,坚持"三大效益"兼顾的原则,才能实现森林生态旅游资源开发与保护的良性循环。

SFI is a public research institution of national importance, with a comprehensive research programme focusing on biological, ecological, silvicultural and spatial aspects of forests and forested landscape including forest ecology, forest physiology and genetics, forest protection, ecology of forest fauna and hunting, dendrochronology, dendroecology and dendroclimatology, forest inventory, remote sensing and geographic information systems in forestry etc.

该研究所是国家重点研究机构,主要致力于生物学、生态学、造林学和森林空间森林覆盖等领域的研究,其研究范围涉及森林生态学、森林生理学和遗传学、森林保护、森林动物生态学和狩猎、树木年代学、年轮水文学、年轮气候学、森林资源调查、森林遥感和地理信息系统等。

The experimental teaching centre of forest resource cultivation and conservation was set up, including soil and water conservation laboratory, desertification combating laboratory, forest cultivation laboratory, seed and seedling laboratory, landscape architecture plan room, forest genetics and breeding laboratory, forest management laboratory, forest protection laboratory, dendrology laboratory, among which specimen room acceded to Chinese Plant Specimen Museum Net and was registered and accepted by international plant taxonomy society, with the international code of GAUF.

其中树木标本室已加入中国植物标本馆网络,并被国际植物分类学会注册认可,国际代码为GAUF。

In the third chapter, the development path of the Chisese forest park was reviewed, the hidden trouble behind the forest park development was analyzed, the development direction of the Chisese forest park was pointed out. On this basis, considering the harm of the tourist peccancy and present situation of tourist peccancy management in forest park, the necessity and urgency of tourist peccancy management in forest park was expounded.

第三章简要回顾了中国森林公园的发展轨迹,分析了森林公园快速发展背后的隐患,指出了中国森林公园的发展方向,在此基础上,结合游客违章行为的危害及全国森林公园游客违章行为管理的现状,阐明了森林公园游客违章行为管理的必要性与紧迫性。

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相关中文对照歌词
In The Forest
Forest For The Trees
Queen Of The Forest
Forest Fire
Forest Full Of Needles
They Pray With Snakes (Remix)
Forest Lawn
The Battle Of Epping Forest
Home From The Forest
Forest Serenade
推荐网络例句

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料,分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。

I don't want to add to your trouble.

我不想给你增加麻烦。