查询词典 cluster

A Cluster Validity Function Based on Geometric Probability.

一种基于几何概率的聚类有效性函数。

This paper proposes a cluster analysis approach based on geometric probability, which determines the classification number directly according to the distributive characteristics of pixels in the spectral space by utilizing geometric probability and gradually generates the hierarchical classification system beginning at the top level.

本文提出基于几何概率的聚类分析方法，该方法运用几何概率直接根据像元在灰度空间中的分布特征决定分类数，按照先分大类、后分小类、逐层细分的顺序确定分类方案。

Within the square mile itself, the City's incessant demand for more space has led to a huge wave of new developments. To the east of the great dome of St Paul's Cathedral, built in the late 17th century, a cluster of 21st-century skyscrapers is planned as new towers with names like the "Helter-skelter" join the "Gherkin", completed three years ago.

就在这狭小的"一平方英里"内城里面，由于持续旺盛的需求，金融城也在不停有开发着新的项目，往东挨着 17 世纪的圣保罗大教堂，一群被命名为"Helter-skelter"的 21 世纪的摩天大楼正在酝酿之中，加入了 3 年前已经竣工的"Gherkin"楼群行列。

Within the square mile itself, the City's i ncessant demand for more space has led to a huge wave of new developments. To the east of the great dome of St Paul's Cathedral , built in the late 17th century, a cluster of 21st-century skyscrapers is planned as new towers with names like the " Helter-skelter " join the " Gherkin ", completed three years ago.

就在这狭小的"一平方英里"内城里面，由于持续旺盛的需求，金融城也在不停有开发着新的项目，往东挨着17世纪的圣保罗大教堂，一群被命名为"Helter-skelter"的21世纪的摩天大楼正在酝酿之中，加入了3年前已经竣工的"Gherkin"楼群行列。

Ecological analysis of morphological and genetic variation revealed that:(1) The averages of morphological characters were significantly negatively correlated with WSF (2) Dominant frequencies of some RAPD loci were significantly correlated with WSF (3) The correlation between morphological variation and genetic variation was not significant (4) The cluster analysis based on morphological and genetic evidence supported that all population can be divided into three ecotypes: saltmarsh reed, freshwater reed and giant reed.

相关分析表明：种群内各形态特征的平均值均与水盐联合影响因子显著负相关，但种群内形态变异系数与水盐联合影响因子普遍相关不显著；种群遗传多样性指数与水盐联合影响因子相关不显著，但部分生境倾向型的RAPD位点的显性频率和来自等位酶分析的克隆多样性水平与水盐联合影响因子显著相关；形态变异系数与遗传多样性指数相关不显著，但相关系数均为正值。

The basal diameter, height of aerial stem, leaf length at middle stem, leaf width at middle stem, internode length at middle stem, internodes number and panicle length of 30 plants from every population were recorded. The statistics of morphological characters showed that the distribution trends of the averages of morphological characters are similar among populations. However, the coefficients of variation within population of 7 morphological characters were very different. The CV of internodes was largest and the CV of height was smallest within population. F-statistics showed that the differences of all morphological characters among populations were significant (P.01). But the differences among populations were different between different groups. The cluster analysis proved that all populations could be divided into three types: salty reed, freshwater reed and giant reed.

对来自每个种群的30个个体的基径、株高、中部叶长、中部叶宽、中部节间长、节间数、穗长7个形态特征的统计分析表明：各形态特征平均值在种群间的分布趋势相似，但变化幅度不同，株高、叶长等营养特征变化较大大，生殖特征穗长的变化较小；7个形态指标在种群内的平均变异度从大到小依次为中部节间长、中部叶宽、穗长、中部叶长、基径、节间数、株高，种群内的平均形态变异度与生境异质性有关；7个形态指标在种群间均差异显著，但多重比较分析显示显著差异主要存在于BZH、淡水生境种群和盐渍化生境种群之间，在相似生境种群间的形态差异不显著；以形态特征为依据的聚类分析支持将15个种群分为三类：盐生芦苇、淡水芦苇和巨型芦苇。

The clusters respond well to gibberellic acid or cane girdling to improve cluster compactness and berry size.

该组反应良好赤霉素或甘蔗剥皮，以提高集群小型化和浆果的大小。

In an overview,we have confirmed our previous study onα-globin cluster with normal 3C assay.

结果分析表明，绝大部分的Tags是定位到小鼠α-珠蛋白基因簇上的。

The data provide the basis for a novel model of the developmental regulation of the mammalian α-globin gene cluster .

这些实验结果提供我们建立一个全新的α红血球蛋白基因群组的调控模式。

The third is the remote globular star cluster NGC 2419, at distance of nearly 300,000 light-years.

其中两个是附近的恒星，第三个就是距离我们30万光年之远的球状星团NGC 2419。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。