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超体积
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  hypervolume
    Based on the theory of fuzzy hypervolume niche,8 species' niches of Chimonanthus praecox community in northwestern Hunan province are studied according to the basic data of the samplings.
    在模糊超体积生态位理论的基础上,根据样地调查所获得的基本数据,研究了湘西北蜡梅群落中8个物种的生态位.
短句来源
    Study and Application on the Theory of Fuzzy Hypervolume Niche
    模糊超体积生态位理论的探索与应用
短句来源
    Niche which many ecologists have become interested in is an important concept in ecology. The main definitions of niche are the habitat niche of Grinnell (1917), the functional niche of Elton (1933) and the hypervolume niche of Hutchinson (1957) whose concept has by far the largest influence on niche.
    生态位(niche)是生态学的一个重要概念,许多生态学家都对生态位下了定义,主要有Grinnell(1917)的生境生态位,Elton(1933)的功能生态位,Hutchinson(1957)的超体积生态位,尤以Hutchinson的“超体积生态位”影响为大。
短句来源
    Based on the Hutchinson's niche theory ,the paper build up the pattern of n dimensional hypervolume niche construction.
    基于Hutchinson的生态位理论 ,建立了n维超体积生态位的构建模式。
短句来源
    Fuzzy hypervolume niche was proposed to overcome the limitation of Hutchinson's niche concept and the formulas to measure two important indexes—niche width and niche overlap which can be easily applied in practice.
    为克服Hutchinson的生态位定义的局限提出了模糊超体积生态位,以及度量生态位的两个重要指标——生态位宽度和生态位重叠,新公式便于应用。
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  “超体积”译为未确定词的双语例句
    A brief review of development of niche theory is offered in this paper, with emphasis on niche concept of three ecologists, Grinnell's "spatial niche", Elton's "functional niche"and Hutchinson's "multi - dimension-al hypervofume niche".
    本文回顾了生态位理论的发展概况,介绍了在生态位理论发展历程中作出巨大贡献的三位生态学家,格林尼尔的“空间生态位”,埃尔顿的“功能生态位”,哈奇森的“多维超体积生态位”概念。
短句来源
    The results indicate that multi-dimensional niche overlap is usually bigger than the product of separate niche overlaps if resource dimensions are independent and the formulas are close to Simpson Index and Schoener Formula respectively.
    结果表明:当物种利用的各个资源类型独立时,多维生态位重叠往往大于各维生态位重叠的乘积; 模糊超体积生态位的度量公式分别与Simpson指数和Schoener公式的形式相近;
短句来源
    In its century's development history,the most representative concepts were spatial niche,functional niche,and n-dimensional hyper-volume niche.
    在生态位概念百年演变史中,“空间生态位”、“功能生态位”与“多维超体积生态位”最具代表性。
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  hypervolume
Niches of the species are compared using Hutchinson's multidimensional hypervolume as a model.
      
Its underlying core data structure is a novel 4D spatio-temporal representation which we call the video hypervolume.
      
In this paper we present a method to estimate the noise distance in noise clustering based on the preservation of the hypervolume of the feature space.
      
A five-dimensional hypervolume constituted the experimental design space.
      
Any comprehensive investigation of a multivariate endocrine system should also include an analysis of variance (σ), as it may provide additional insights into the dynamics of an endocrine hypervolume.
      
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The implications of fundamental and realized niche proposed by Hutchi-nson in 1957 are discussed.Species realized niche will never overlap based on hisdefinition,contracting with that in the realistic environmental array.To remedvthe confusion in using the concepts of fundamental and realized niche,we sug-gest that these two notions should be defined for a species or a species population individually.A species fundamental niche will not be cenfined in a particularcommunity but in its areal or even in some hypothesized...

The implications of fundamental and realized niche proposed by Hutchi-nson in 1957 are discussed.Species realized niche will never overlap based on hisdefinition,contracting with that in the realistic environmental array.To remedvthe confusion in using the concepts of fundamental and realized niche,we sug-gest that these two notions should be defined for a species or a species population individually.A species fundamental niche will not be cenfined in a particularcommunity but in its areal or even in some hypothesized environmental characte-ristic combination which allows the species to survive and reproduce,i.e.,funda-mental niche is determined by the species physiological tolerance or requirements.It should be an entity or hypervolume in the n-dimensional niche space.A speciesrealized niche is described as the environmental characteristic combinations thatsurround a species population in a particular community.In the niche space,it ismanifold.Another new concept,niche center,is defined as the point or a compart-ment where the species response is optimal within the niche space.When a speciesdistribution is ignored or the species has a homogenous distribution within the a-vailable compartments of the compartmentalized niche space,the point defined iscalled its theoretical niche center.Usually species disstribution is uneven andthe point defined is called its realized niche center.The distance froma species rea-lized center to theoretical niche center is defined as its niche deviation.And thedegree of a speices niche hypervolume diffuse within the niche space is describedwith the niche diffusion index.Formulae are proposed for such metrics and anexample from a south China subtropical evergreen forest community is presented.

本文对n 维超体积生态位定义作了进一步的阐明.物种的“基础生态位”为其分布区的环境参数及其生理学容忍性和要求所决定,而“实现生态位”则为该物种种群在某一特定群落生境中所处的环境参数所确定.一物种的生态位中心点为该物种在生态位空间中具最佳适应的位置.进而根据是否在测度中考虑进物种分布参数,而分别称为理论与实现生态位中心点.以广东鼎湖山厚壳桂(Cryptocarya)群落在利用土壤营养方面为例,说明物种生态位中心点等指数的测度.

By taking spring wheat, a main crop in semi arid regions of P.R.China, as the object, Hutchinsons niche concept of n dimensional supervolume is extendsed, and the concept of niche fitness is defined mathematically. The niche fitness degree refers to the closerness between the species actual resource state and the optimum niche. In addition, a new model of niche fitness is established by using the closeness degree between species actual resource state and the optimum niche. The results obtained...

By taking spring wheat, a main crop in semi arid regions of P.R.China, as the object, Hutchinsons niche concept of n dimensional supervolume is extendsed, and the concept of niche fitness is defined mathematically. The niche fitness degree refers to the closerness between the species actual resource state and the optimum niche. In addition, a new model of niche fitness is established by using the closeness degree between species actual resource state and the optimum niche. The results obtained from water fertilizer regulation experiment show that the optimum niche values tend to increase with the increase of soil water contents on the water gradient. Both moderate fertilizing in arid fields and plastic film covering after sowing have the effect of increasing fitness. The values of crops niche fitness degree are increased by 6.5% and 12.6% respectively, and their yields by 10% and 18.5% after 20 d and 40 d plastic film covering. The grain yield of the spring wheat is remarkably interrelated with the fitness values.

以半干旱区主要农作物春小麦为研究对象,扩展了Hutchinson的n维超体积的生态位概念,给出生态位适宜度的数学定义,即定义生态位适宜度为生物种的现实资源位与最适生态位之间的贴近度.并利用几何贴近度的概念,建立了作物生态位适宜度的一种新模型.依据水肥调控试验结果所作计算表明:在水分梯度上随着土壤水分含量的增加,作物生态位适宜度值呈上升趋势;旱地适量施肥和播种后地膜覆盖都具有增加其适宜度的效应,采用地膜覆盖20d和40d,作物适宜度值分别增加6.5%和12.6%,作物产量增加10%和18.5%;春小麦的籽粒产量与适宜度值之间呈现显著的相关关系

The niche theory contributed much to development of theoretical and applied ecology. A brief review of development of niche theory is offered in this paper, with emphasis on niche concept of three ecologists, Grinnell's "spatial niche", Elton's "functional niche"and Hutchinson's "multi - dimension-al hypervofume niche". Furthermore, proper understanding of niche concept and concerned theory, and its directing to agriculture with detailed measures are also discussed.

生态位理论近年来在理论生态学和应用生态学的发展中起到了重要的作用。本文回顾了生态位理论的发展概况,介绍了在生态位理论发展历程中作出巨大贡献的三位生态学家,格林尼尔的“空间生态位”,埃尔顿的“功能生态位”,哈奇森的“多维超体积生态位”概念。用系统论的观点总结了如何正确理解生态位概念及其理论,并就如何应用生态位理论来指导农业生产实践提出了切实可行的多种途径,如高效合理利用现存的生态位,开拓潜在生态位,定向改变基础生态位等,也为生态位理论更好地指导农业生产实践提供了新思路。

 
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