基本释义:

主成分

网络释义

1)Principal component,主成分

2)principal components,主成分

3)principal component analysis,主成分

4)PCA,主成分

5)main component,主成分

6)major and minor components,主次成分

用法和例句

Application of filter-detection and principal component analysis to the study of the multivariate data in lithological-mineralized section;

滤波检测与主成分分析技术及其应用

An analysis on the principal components for the technical progress of the coal industry;

煤炭工业技术进步的主成分分析

The numerical algorithm of principal component analysis;

主成分分析法的数值实现算法

In this paper, near-infrared spectroscopy quantitative analysis of samples of flue-cured tobacco and wheat is discussed using principal components-all possible regression (PCR-SR).

利用主成分-所有可能回归法，建立了烤烟、小麦样品不同组份的近红外光谱定量分析模型。

For a class of seemingly unrelated regression system consisting of two equations,an improved estimation of principal components is proposed and the optimal properties are discussed in the sense of mean squared error(MSE).

针对两个相依方程组成的一类回归模型,提出回归系数的一种组合主成分改进估计方法,在均方误差意义下讨论了这种估计量的优良性质,研究了此估计与主成份改进估计的关系。

Then the decade affections of all factors are estimated using center difference and ascertains principal components.

以黄河清涧河流域为例,首先在10年尺度下对流域水沙因子进行分离,采用中间差分格式估算水沙演变各项因子的年代影响量,确定主成分。

Application of principal component analysis to evaluating development level of China s building industries;

主成分分析在评价建筑企业发展水平中的应用

And then,it applies the method of principal component analysis(PCA)to condense 15 indictors(such as total asset and total asset growth rate)which inference the capital structure of forestry listed company into 2 principal components("size and earning of corporation","structure of stock ownership and growth of corporation").

利用主成分分析方法将反映林业上市公司资本结构影响因素的总资产、总资产增加率等15个指标归纳为两个主成分(“公司规模与盈利性”、“股权结构与成长性”),并以这两个主成分为解释变量,以资本结构度量指标为被解释变量进行多元线性回归分析,以测度这两个主成分影响林业上市公司资本结构的方向和程度。

Structure of orthopteran communities,correlations between vegetation factors,and orthopteran communities characters in ecologically restored area of Shaanxi Wuqi were studied by means of persity index,principal component analysis and stepwise regression.

应用多样性指数、主成分分析及多元逐步回归等方法,对陕西吴起县生态恢复区直翅目昆虫的群落结构,植被因素与直翅目昆虫群落特征的相关性进行研究。

The University Innovation Ability Appraisal Based on PCA-BP and Cluster Method

基于主成分神经网络和聚类分析的高校创新能力评价

Based on the problems such as data consist- ency, missing data, collinearities of variables, the standardization of the data in PCA, the paper puts forward how to detect and deal with the problems.

针对目前多元质量控制过程中经常出现和容易被忽略的问题,探讨了如何处理数据的一致性,数据缺失,变量之间线性相关的危害、处理方法以及主成分分析的数据标准化问题,旨在为实际生产过程中的质量工程师提供指导和帮助。

The results which were got by using PCA to analyze the climate factors a.

应用相似性分析、主成分(PCA)分析及多元逐步回归等方法比较了洛河流域黄土高原不同地区蝗虫的群落结构。

The parameter model subsists severe multi-co-linearity by main component analysizing,therefore, the ordinary regression methods cannot gain precise coefficient value.

通过运用主成分法对系数模型进行分析,发现此模型具有严重的多重共线性,因此不能应用普通的回归估计方法得到精确的系数估计值,在此情况下本文提出了快速有效的主成分回归估计法,并利用同位级正交设计方法,结合具体切削条件,设计了铣削力系数识别试验及验证仿真试验。

In the paper,by using the method of main component analysis,three main components are chosen as the comprehensive evaluation index from seven eco-nomic efficiency indexes which are beirig commonly used by the enterprises and the economic significance of the main component is disclosed vvith the factorial analysis.

运用主成分分析方法，对当前企业经营的七项经济效益指示，选出三个主成分作为综合评价指标，并利用因子分析方法揭示其经济意义，利用所建立的评价方法对镇江市六个企业的经济效益进行评价，获得了满意的效果。

In this paper we have found the main components in a n -dimension random vector X , the so called main compon ents don′t contain linear relation and the others of X can be expressed as the linear combination of the main components.

本文提供了在多维随机变量中寻找主成分的一种方法 ,证明了其余分量均可表示为主成分的线性组合 ,解决了多维随机变量的各个分量之间所存在的线性关系问题 。

Determination of major and minor components in nickel laterite ores by X-ray fluorescence spectrometry;

X-射线荧光光谱法同时测定镍红土矿中主次成分

Determination of major and minor components in silica by X-ray fluorescence spectrometry;

X-射线荧光光谱法测定硅石中主次成分

X-ray fluorescence spectrometry for determination of major and minor components in zircon sand

X射线荧光光谱法测定锆英砂中主次成分

How to Effectively Use the Principal Component of Principal Component Analysis;

如何有效利用主成分分析中的主成分

The Principal Component Analysis of Central Trace Elements in Four Shellfish

4种贝类主要微量元素的主成分分析

Keywords: design hyetograph, principal components analysis, cluster analysis.

关键词：设计雨型、主成分分析、群集分析。

Research on empirical mode decomposition based on spectrum entropy methods and principal component analysis

谱熵和主成分分析用于EMD分解研究

Application of principal components analysis in regional economy analysis

主成分分析在区域经济分析中的应用

KPCA extracting principal component with nonlinear method is an improved conventional PCA.

核主成分分析方法是主成分分析的改进算法，其采用非线性方法提取主成分。

Application of principal component analysis method in cost analysis for gold mine;

主成分分析法在黄金矿山成本分析中的应用

Study on trace element of Anti-oxygen deficits Chinese Traditional Medicines by Using Principal Component Analysis

主成分分析用于中成药中微量元素含量分析

Principal Componnent Evaluation--A Multivariate Evaluate Method Expanded from Principal Component Analysis;

主成分分析用于多指标评价的方法研究——主成分评价

CORRELATION AND PRINCIPAL COMPONENT ANALYSES ON MAJOR AGR ONOMIC CHARACTERS OF BALSAM PEAR (Momordica charantia L.)

苦瓜主要农艺性状的相关性和主成分分析

Principal Component Analysis of Main Index of National Economy of Jiangsu Province;

江苏省国民经济主要指标的主成分分析

Coke consists mainly of carbon.

焦炭的主要成分是碳。

major Hang Seng Index constituent stock

恒生指数主要成分股

silicone-base oil

以硅油为主要成分的油

main part or ingredient to which other things are added

混合配料的主要成分

a tincture of opium or any preparation in which opium is the main ingredient.

鸦片占主要成分的酊剂。

Bread is made chiefly of flour.

面包的成分主要是面粉。

Sugar is the main constituent of candy.

食糖是糖果的主要成分。