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continuous forest
相关语句
  森林连续
     A STUDY OF CONTINUOUS FOREST INVENTORY (CFI) BY POINT SAMPLING
     用点抽样进行森林连续清查的研究
短句来源
     A STUDY ON CONTINUOUS FOREST INVENTORY
     森林连续清查的研究
短句来源
     A STUDY OF CONTINUOUS FOREST INVENTORY ON MORE THAN TWO OCCASIONS
     多期森林连续清查的研究
短句来源
  “continuous forest”译为未确定词的双语例句
     Cartography Technique and Methods of Continuous Forest Inventory
     森林资源连续清查图件生成的技术与方法
短句来源
     Application of Remote Sensing Mathematical Statistics Interpretation on Sample Plots in Continuous Forest Inventory
     遥感成数样地判读在森林资源连续清查中的应用
短句来源
     The method, purpose and the result of the remote sensing mathematical statistics sample plots application in continuous forest inventory were discussed.
     论述了遥感成数样地在森林资源连续清查中应用的方法、目的及其结果。
短句来源
     Application of the Age implicit Growth Model to Continuous Forest Inventory
     年龄隐含的生长模型在森林资源连续清查中的应用
短句来源
     Growth Model System for Continuous Forest Inventory
     应用于森林资源连续清查的生长模型系统
短句来源
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  相似匹配句对
     forest .
     林。
短句来源
     Continuous Cover Forest and Its Silvicultural Systems
     恒被林及其育林体系
短句来源
     A STUDY ON CONTINUOUS FOREST INVENTORY
     森林连续清查的研究
短句来源
     4: continuous.
     连续分布,为4级。
短句来源
     Z-continuous Poset
     Z-连续偏序集
短句来源
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  continuous forest
We compared 2 1-ha vegetation plots in forest fragments north of the La Macarena Mountains with 7 plots in continuous forest in Tinigua National Park.
      
Cattle and agricultural farming in the western Orinoco Basin began in 1555, and since then fragmentation of continuous forest has occurred.
      
Understanding resource shifts in fragments can shed light on socioecological questions by providing comparisons between continuous forest and fragment populations with differing diets and resource distributions.
      
The level of specialization was high: fragment groups devoted 30-40% of feeding time to Bakerella clavata, compared to 28-30% in continuous forest.
      
In contrast, 2 groups in fragments employed the lean season strategy of eating mistletoe year-round; the fruiting tree species that sustain continuous forest groups through the rainy season were largely absent.
      
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This paper consists of four parts, which state to the effect that (i) Analyses and comparisons of efficiency of point sampling have been made. Materials indicate that efficiency of the point sampling was seriously affected by conditions of forests investigated; (2) Biases of omission were examined and analysed in both practice and theory. A method which can be used to eliminate biases of omission and estimate the size of biases is developed; (3) Comparisons have been made between the traditional method and the...

This paper consists of four parts, which state to the effect that (i) Analyses and comparisons of efficiency of point sampling have been made. Materials indicate that efficiency of the point sampling was seriously affected by conditions of forests investigated; (2) Biases of omission were examined and analysed in both practice and theory. A method which can be used to eliminate biases of omission and estimate the size of biases is developed; (3) Comparisons have been made between the traditional method and the Meyer's for estimating the change of forest resources, which show the latter is more efficient, but by this method it is not convenient for the current estimate of forest resources to be used as a basis for their next estimation; (4) According to the advantages and disadvantages of point sampling, the question of application of point sampling to continuous forest inventory and other matters that merit attention are discussed.

用点抽样进行森林连续清查,国内外都有采用。如“席卷美国南部的森林清查新体系”和北欧三国的全国性连续清查都是以点抽样为基础。我国广西1977年开始的各级森林连续清查也采用了点抽样(角规控制检尺)。实践表明,用点抽样进行连续清查,不仅可能产生蓄积偏小误差,还可能产生断面积生长量的测算方法和精度问题。因此,国内外对此法的实践可行性存在着疑义。有必要对此法的实践可行性在理论和实践上作进一步的研究。 本文主要探讨了点抽样的效率,偏差及估计资源变化的方法和精度问题。 所用资料是以广西自治区用点抽样进行连续清查的2909个样点的生产性调查数据为基础,因为只有这样才能真正检验出这种方法在实践中所产生的问题,并找出相应解决办法。此外,为了对比分析,1980年复查时从全区2909个固定样点中又系统抽取了约1/4的样点(共717个),以样点为中心设置了面积为一市亩的方形样地717块进行每木调查,用之与相应样点的角规控制检尺调查结果作对比分析。同时还进行了一些模拟试验和理论分析。研究结果介绍如下:

This paper analyzes the essence of the method of purposive sample plot, which has long been applied in Soviet Union and in China. It also discusses the method of determining the age of technical maturity and that of quantitative maturity of forest on the basis of the information of forest management survey (subcompartment survey) and continuous forest inventory (C. F. I.) with the aid of the tested standard tables. It suggests a new and economical way for determining the maturity and felling age of forest...

This paper analyzes the essence of the method of purposive sample plot, which has long been applied in Soviet Union and in China. It also discusses the method of determining the age of technical maturity and that of quantitative maturity of forest on the basis of the information of forest management survey (subcompartment survey) and continuous forest inventory (C. F. I.) with the aid of the tested standard tables. It suggests a new and economical way for determining the maturity and felling age of forest to forestry enterprises as well as the provinces where C. F. I. system has been established.

本文剖析了苏联及我国沿用已久的标准地法的实质。探索了用森林经理小班调查材料、连续清查样地材料结合已验证的标准表来确定数量、工艺成熟龄的可能性,为基层林业生产单位及已建立连续清查体系的省(区)确定成熟龄和论证主伐年龄提供取材广泛而又较经济的方法。

The paper has made a systematic theoretical analysis and test on the relation of the forest belt line amount, length, the rate of preservation and the forest belt integrality using the way of probability theory. It has advanced that pledging the integrality of the forest belt, continuous forest belt line amount relate with the rate of preservation and forest line length; On the basis of theoretical analysis,the optimum design line amount schedule of the forest belt has been set up; The theoretical...

The paper has made a systematic theoretical analysis and test on the relation of the forest belt line amount, length, the rate of preservation and the forest belt integrality using the way of probability theory. It has advanced that pledging the integrality of the forest belt, continuous forest belt line amount relate with the rate of preservation and forest line length; On the basis of theoretical analysis,the optimum design line amount schedule of the forest belt has been set up; The theoretical basis and concreting way on the design of the forest belt line amount has been proposed.

本文用概率论方法对林带行数、长度、保存率与林带完整性的关系做了系统的理论分析和验证,提出保证林带完整、连续的林带行数与保存率和带长有关;在理论推导的基础上建立了带状林最佳设计行数表;给出了带状林行数设计的理论根据和具体方法。

 
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