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- Subject the matrix to principal components analysis. 主成分分析法。
- Keywords: design hyetograph, principal components analysis, cluster analysis. 关键词：设计雨型、主成分分析、群集分析。
- The method involves principal components analysis, phase space reconstruction and least squares estimate. 方法包括3部分：主分量分析，相空间重构，最小二乘拟合。
- Using conven-tional change detection techniques such as image differencing or principal components analysis helped to high-light salient changes. 要分析规划区内的环境,可利用区内的植被指数均值。
- This paper explores the effect of integration of trade and investment on the R&D investments by panel data model and principal components analysis. 本文利用面板数据模型，结合主成分分析法，研究了中国贸易投资一体化对研发投入的影响。
- Contraposing the problems of multicollinearity among indexes of evaluation sample,projection pursuit principal components analysis has been presented in this paper. 3. 针对评价样本指标间存在多重相关性问题,本文建立了投影寻踪主成分分析。
- And seven main characters was showed notability difference was used to principal components analysis and six characters for influence of single plant grain weight was used to pathway analysis. 结果表明，7个主要农艺性状经主成分分析可归结为3个主成分因子，对产量影响较大的因素分别为粒数因子、粒重因子和长度因子。
- Then the data were analyzed by the absolute principal component analysis (APCA) to evaluate principal components and the percent variance explained by them. 对获得的浓度数据进一步作绝对主成分分析(APCA),获取颗粒物的主要来源成分和它们所占的比值。
- According to the Y chromosome 12 kind of monomers double allele frequency data,the paper utilizes the principal components analysis and Rough-set Theory to classify in 13 kind of nationalities crowds the northeast area. 运用主成分分析、聚类分析和粗糙集理论;依据Y染色体的12种单体型的双等位基因频率数据;对东北地区13种民族人群进行分类.
- In this paper three kinds of ordination methods, polar ordination (P0), principal components analysis (PCA) and fuzzy grouping analysis (FGA) are used to study the insect community of ten typical type of grassland in Alty region. 本研究对阿勒泰地区有代表性的10种类型草场上昆虫群落利用极点排序法、主分量分析法和模糊聚类法进行了排序研究。
- The new neural network prediction model of water level is established based on the principal component analysis (PCA). 采用人工神经网络与主分量分析相结合的方法，建立了梧州水位的预报模型。
- By principal components analysis,this paper selects 20 indexes,by which it evaluates and classifies the difference of economic development level in the regions in Guizhou province. 运用主成分分析的数理统计方法,选择20项指标,对贵州省各地(州、市)经济发展水平的地域差异进行了综合评价和聚类划分。
- Principal components analysis is employed to establish an evaluating model for the evaluation of the competence,and statistics software SPSS is used to analyze the competence of Shaanxi province. 以因子分析法为主要分析方法构建了区域软件产业竞争力的评价模型。
- In time domain, feature parameters of the step response are compressed using principal component analysis (PCA). 从时域角度,利用主元分析压缩电路阶跃响应的特征参数,从而简化了神经网络结构并提高了网络训练速度,提高了诊断效率。
- A novel method of car license plate extraction based on Probabilistic Principal Component Analysis (PPCA) is presented. 摘要提出了一种新颖的采用概率主成分分析的车牌提取方法。
- The mathematic principle of principal component analysis method (PCA) lies in coordinate conversion. 主分量分析法（PCA）的数学原理是坐标转换，它将原变量变换成互不相关的变量。
- This paper presents an algorithm about SAR image change detection based on Principal Component Analysis(PCA). 该文提出一种基于主分量分析(PCA)的SAR图像变化检测算法。
- The dimension of MTS database was reduced firstly by Principal Component Analysis (PCA). 采用主成分分析方法对MTS数据进行降维处理；
- EOF, EOF procedures, principal component analysis procedure, suitable for vector field orthogonal decomposition. 经验正交函数，EOF程序，主成分分析程序，适合做向量场的正交分解。
- Using principal component analysis in chemometrics, a distribution feature of the nutritive elements was discussed. 运用化学计量学中的主组分分析方法，讨论了这些营养元素分布特征。
