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dominance index     
相关语句
  优势度指数
     Simpson dominance index was 0.234 9-0.415 7;
     Simpson生态优势度指数在 0 2 349~0 4 15 7之间 ;
短句来源
     4.Statistics analysis was indicated that the trend of the changes with month in the diversity index (H ' ) was coincident with that of eveness index ( J) and richness index (E), and contrary to that of dominance index (C).
     4.经过统计分析发现:7类林地土壤动物多样性指数(H′)与均匀度指数(J)和丰富度指数(E)随时间变化趋势基本一致,而与优势度指数(C)的变化趋势大致相反。
短句来源
     The Shannon- Weiner index, evenness index, dominance index of avian community was 3.0272, 0.5741, and 0.1375, respectively.
     鸟类多样性指数为3.0272,均匀性指数为0.5741,优势度指数为0.1375。
短句来源
     18625 chigger mites collected from the body surface of small mammals in pinewoods account for 33.13% of the total collected chigger mites and the chigger mite community in the pinewoods also get the highest value of richness(S=94),Shannon-Wiener diversity index(H'=4.3404) and evenness(J'=0.9553),but lower dominance index(C' = 0.2658).
     小兽体表采获恙螨18625只,构成比33.13%,物种丰富度(S=94)、多样性指数(H'=4.3404)、均匀度(J'=0.9553)最高,优势度指数低(C'=0.2658)。
短句来源
     Diversity of fish community in the catch was low. The diversity index(H′),dominance index(λ) and evenness index(J′) of fish community were 2.790,0.198 and 0.657,respectively.
     鱼类群落多样性较低,以个体数为单位计算的Shannon-Wiener多样性指数H′为2.790,Simpson优势度指数λ为0.198,Pielou种类均匀度指数J′为0.657。
短句来源
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  优势度
     The dominance index of forest cover was increased from 0.611 to 0.692 during the period from 1985 to 1993,and that of climax forest community was increased by 70%.
     1985~1993年间,有林地优势地位加强,优势度从0.611增加到0.692,顶极群落优势度增加70%;
短句来源
     Simpson dominance index was 0.234 9-0.415 7;
     Simpson生态优势度指数在 0 2 349~0 4 15 7之间 ;
短句来源
     4.Statistics analysis was indicated that the trend of the changes with month in the diversity index (H ' ) was coincident with that of eveness index ( J) and richness index (E), and contrary to that of dominance index (C).
     4.经过统计分析发现:7类林地土壤动物多样性指数(H′)与均匀度指数(J)和丰富度指数(E)随时间变化趋势基本一致,而与优势度指数(C)的变化趋势大致相反。
短句来源
     based on the measurement of the ecological dominance index,the index of the gap edge effect in the gap border area was about 0.653 1~2.740 3.
     而用生态优势度值测定的林隙边缘区的边缘效应强度值为0.653 1~2.740 3。
短句来源
     The Shannon- Weiner index, evenness index, dominance index of avian community was 3.0272, 0.5741, and 0.1375, respectively.
     鸟类多样性指数为3.0272,均匀性指数为0.5741,优势度指数为0.1375。
短句来源
更多       
  优势指数
     All the lice on the body surface of the hosts were completely collected. Richness (S),diversity index (H′),evenness(J′) and dominance index (C′) were used to illustrate the community structure of sucking lice on the hosts.
     吸虱群落结构用丰富度 (S)、Shannon Wiener多样性指数 (H′)、均匀度 (J′)及优势指数 (C′)描述。
短句来源
     Richness, diversity index, evenness and dominance index were used to illustrate the community structure of sucking lice on the hosts in the light of Shannon-Wiener's method.
     吸虱群落结构用丰富度、Shannon -Wiener多样性指数、均匀度及优势指数描述。
短句来源
     Some achievements have been made in the ecological studies of medical arthropods and according to these achievements,some important methods in community ecology and their applications in the field of medical arthropods were reviewed in this paper. The methods involve richness,relative dominance,dominance index,diversity,evenness,species-abundance distribution,ecological niche,interspecies association and numerical classification of community,etc.
     结合当今医学节肢动物生态研究成就,本文从方法学角度综述了群落生态学方法在医学节肢动物研究中的应用现状,涉及群落丰富度、相对优势度、优势指数、多样性、均匀度、种多度分布、生态位、种间协调关系以及群落数量分类等多方面。
短句来源
     This paper defines the dominances of major grain crops' varieties at different regions and also the regional distribution of the comparative dominance for grains (wheat, rice, corn) at three big regions of eastern, central and western part of China, according to the requirement from the strategic adjustment of the agriculture structure in China at the new century, after China joined WTO, and adopting comparative dominance index and comprehensive comparative dominance index of multi-factors as calculation methods.
     针对我国加入WTO和新世纪我国农业结构战略性调整的需要 ,对东部、中部、西部三大地区的粮食 (小麦、稻谷、玉米 )采用多因素比较优势指数和综合比较优势指数计算的方法 ,确定不同地区主要粮食品种优势度和比较优势区域布局
短句来源
  优势指标
     Random Dominance Index Method and its Application
     随机优势指标方法及其应用
短句来源
     This paper proposes a concept of random dominance index which extends improves the theory of random dominance and its application to decision analysis. Also, it gives the method of domiusnee index a strict proof.
     提出随机优势指标的概念,扩充了随机优势理论及其在决策分析中的应用,并对随机优势指标方法的正确性作了严格论证。
短句来源

 

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      dominance index
    The Sodium Dominance Index (SDI) is essentially a ratio of cations, namely, the concentration of Na+, divided by the sum of the concentrations of Na+, Ca2+, and Mg2+ expressed as a percentage.
          
    Putting the Sodium Dominance Index to the Test as a Measure of Acid Sensitivity Across Diverse Geological Conditions and with Re
          
    With secondary succession, the percentage biomass of perennial species, particularly of grasses, gradually increased and the dominance index (1-H'/H'max) also increased.
          
    adenophora relative dominance index (20% higher on average) than soil biota in the non-invaded site.
          
    La Garonne Bay and Niel Bay, much less polluted, had low chlorophyll a levels, low zooplankton abundance, low dominance Index and high diversity index and eveness.
          
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    The ecological dominance of 14 subtropical forest communities in Guangdong are measured in this paper. According to further research of the measured results, the use and the effect as well as the ecological meaning of ecological dominance index are explored.

    本文应用simpson优势度指标,测定广东亚热带14个森林群落的生态优势度。对测定结果深入分析,说明了生态优势度指标在森林群落分析上有较大的意义,可以衡量不同的群落类型,作为群落分类的辅助指标;能反映群落生境变化对群落结构的影响,以及说明森林群落演替过程群落结构的变化;广东亚热带森林在自然状况下向气候顶极群落的演替过程中,生态优势度指标逐渐下降。 本文还进一步探讨生态优势度的生态学涵义。说明生态优势度指标的群落生态学意义,指出与物种多样性指数、群落均匀度在概念上的联系与差别,以及三者在应用上的异同。

    This paper, by way of classification and ordination, has appliedthe quantitative analysis to the secondary deciduous bush-woods inTongchuan area to reveal the types and ecological features of thebush-woods. By synthesizing coverage, height and abundance of speci-es in community as dominance index, 12 formations are distinguishedBecause of different hydro-thermal conditions and humus contents insoil horezo, the formations belong to two, either xeric-mesic or mes-ic, ecological groups. As regards the methods...

    This paper, by way of classification and ordination, has appliedthe quantitative analysis to the secondary deciduous bush-woods inTongchuan area to reveal the types and ecological features of thebush-woods. By synthesizing coverage, height and abundance of speci-es in community as dominance index, 12 formations are distinguishedBecause of different hydro-thermal conditions and humus contents insoil horezo, the formations belong to two, either xeric-mesic or mes-ic, ecological groups. As regards the methods used in the paper, cluster analysis is suit-able to the classification of the bush-woods. The principal componentsanalysis shows the similarities or differences in communities, revealsthe ecologica relationships between communities and their environ-ments and points out key factors causing ecological diversities.

    本文用数量分析方法对铜川地区的次生灌丛进行分类和排序,以揭示其类型构成及生态特点。我们选择盖度、高度和多度之综合作为种优势度指标,共划分出12个群系,它们在水热条件和土壤有机质含量的影响下,分化为旱中生和典型中生两大生态类群。所用数量分析方法中,聚类分析适宜于分类研究,所得结果清晰明确;主分量分析直观反映群落的相似与差异程度及群落与环境间的生态联系,反映引起分异的主导生态因子及具指示意义的植物种类。

    In this paper, principal components analysis in two groups, group E and group S. is applied to the study of secondary succession of vegetation in Tongchuan.area. Shaanxi province. In group E, the ordination has been made based on the dominance indexes of the species in communities, focusing on the different vegetation types related to the different envi- ronments to be distinguisthed. In group S, the ordination has been made based on the character of vegetation related to secondary succession in order...

    In this paper, principal components analysis in two groups, group E and group S. is applied to the study of secondary succession of vegetation in Tongchuan.area. Shaanxi province. In group E, the ordination has been made based on the dominance indexes of the species in communities, focusing on the different vegetation types related to the different envi- ronments to be distinguisthed. In group S, the ordination has been made based on the character of vegetation related to secondary succession in order to show the trend of secondary succession. The results show that the principal components analysis is an ef- fective quantitative method for studying secondary succession of vegeta- tion in a large area where the natural environment is complex. By using this method, the relationship between succession and certain ecological factors can be revealed. The change of communities' properties can be recognized.

    本文用E、S两组主分量分析,对陕西省铜川地区植被次生演替进行分析。其结果表明,主分量分析是一种在自然条件复杂的较大区域内,研究植被次生演替的有效方法,它有助于认识植被次生演替与生态条件的关系及演替过程中群落性质的变化特点。

     
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