查询词典 index forest

Using mathematics compounding methods and GIS technique, we gave an integrated evaluation of the suitability applying to map congruence method and align-to-weighted, through confirming index system criterion of grade, ration method, the conclusion as follows:(1) Evaluation on the suitability of forest landscape is analyzing entironment, structure and function of existent forest landscape.

采用数学组合法和GIS技术结合，在确定适宜度评价指标体系、因子分级标准、定量方式与因子权重后，应用地图叠加法和权重法对每一评价单元进行综合适宜度评价，得到结论如下：(1)森林景观适宜度评价是指对现存森林景观的自然环境条件、景观结构与功能的分析与评价。

In this paper, the marshland of Daxinganling forest region is classified into three kinds, the pass performance of three kings of crawler fire engine, J-50, A531, BFC804 and a kind of two-wheeled forest fire engine of special light-duty HS-8 is studied in theory and test, the calculation formulas of the tangential traction force and the external motion resistance of vehicle are given and the drawbar pull is used as evaluation index.

对大兴安岭林区的沼泽地进行了分类，并对3种履带式森林消防车J-50、A531、BFC804和一种特轻型双轮森林消防车HS-8的沼泽地通过性作了理论与试验研究，给出了切线牵引力和行驶阻力的计算公式，采用挂钩牵引力作通过性评价指标。结果表明，BFC804可以通过重沼泽地，A531和HS-8可以通过中沼泽地，而J-50只能通过轻沼泽地。

Forest ecosystem ; Forest ecosystem service ; Assessment index system ; Value assessment

森林生态系统；服务功能；评价指标体系；价值评估

This performance can be considered as microheterogeneity characteristics.The order of lacunarity index is contrary to the order of coverage rate of the forest landscape elements in the same scale, consequently, lacunarity indices values in experiments can help to study the coverage rate of forest landscape elements changing with the spatial scale.

孔隙度指数的排序与在该尺度下各森林景观组分覆盖率大小排序相反，因而根据试验计算的孔隙度指数值可以研究各森林景观组分的覆盖率随空间尺度变化的情况。

Prattii- Ailanthus altissima deciduous broad-leaved forest community and Cerasus trichostorna-Cerasus dielsiana-Acer caudatum deciduous broadleaved forest community , had lower total richness and Shannon-Wiener index .

3人工林群落与次生林群落相比，人工林群落具有较低的物种丰富度指数和Shannon-Wiener多样性指数以及较高的优势度指数，次生林具有较高的物种丰富度指数和Shannon-Wiener多样性指数以及较低的优势度指数。

Forest ecological benefits index system can divided into two kind from the conception of forest ecological benefits measuration, such as dependent variable of region and stand, independent variable.

本文从森林生态效益计量角度出发，阐述了森林生态效益的定义，指出它与森林资源的相关为第二类相关，并将森林的生态效益的指标体系划分为自变量（区域自变量和林分自变量）和因变量两类。

The harm extent of Dendrolimus tabulaeformis and D. spectabilis were analyzed by fourteen forest factors, from which four significant ones were selected: crown density, altitude, average diameter at breast height and MLP. MLP is a new parameter suggested in this paper. It is better than diversity index to the harm extent, and it can indicate some information on not only the under story plant species diversity but the forest environment. Using the four key factors a multiphase linear regression model was made for risk analysis of the harm extent of pine caterpillar.

该文首次提出了林下植物喜湿度参数MLP(Moisture-Loving Parameter)，并用包括MLP在内的14个林分因子与松毛虫危害程度进行逐步回归分析，从中筛选出主林层郁闭度、海拔高度、油松平均胸径和林下植物喜湿度参数4个关键因子，与松毛虫危害程度之间均呈显著的负相关关系，并进一步用这4个因子与松毛虫危害程度建立多元线性回归模型，该模型可对松毛虫危害程度进行风险评估。

Based on geographic characteristic, current status of social and economic development of Chun'an county and analyses the results of several plan for forest classification, technical index for forest classification of Chun'an county is suggested.

根据淳安县林地的自然特点、社会经济发展现状和分析三种分类方案的结果的基础上，提出了淳安县森林分类的技术指标。

It is an advanced subject to develop stand-unit forest ecosyetem management index system and its assessment method in the study of sustainable forest management at home and abroad.

研建林分级森林生态系统经营指标体系及评价方法是国内外森林可持续经营研究的前沿课题。

Mainly; The export of deep processed product represented by furniture increases rapidly, but the international Chinese wood furniture anti-dumping situation is serious; Log, saw material, paper, paper pulp still forest products imported to rely on product mainly The overall state of international trade of the wooden forest products in China is shown as: It result in seriously imbalance between supply and demand not domestic last international market raw materials import not alleviating; The comparative advantage of processing industry represented by labor intensity is remarkable, the exit increase for the panel products (the plywood , single-board ); The international competitiveness of the deep processed product improves progressively , the international competition contradiction still exists; The lasting unfavorable balance of revenue and expenditure of trade, is the strong support index of coordinating the whole China's favorable trade balance..

中国木质林产品国际贸易总体状况表现为：国内供需矛盾导致严重依赖国际市场原材料进口缓解；以劳动密集为代表的加工业比较优势显著，板材产品出口增加；深加工产品国际竞争力逐步提高，仍存在国际竞争矛盾；贸易收支持续逆差，是协调整体中国贸易顺差的有力支撑指标。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。