离差平方和

采用离差平方和法气象因子可聚为两类，烟叶质量可聚为两类。

Ward method used from the meteorological factors can be grouped into two categories , quality of tobacco can be grouped into two categories .

基于离差平方和的综合赋权法在灌区节水改造评价中的应用研究

Application of Comprehensive Weight Method Based on Sum of Squares of Deviations in Evaluation of Water-saving Reconstruction Project in Irrigation District

同时，用主成分分析（PCA）作为排序的方法和系统聚类中的离差平方和法与类平均法，对东灵山植物群落的生活型谱进行了排序和分类。

Ordination and classification of the life form of plant community were done by principle component analysis ( PCA ) and systemic cluster analysis .

静态条件下SLK交货期完工时间的离差平方和最小问题

Static problem minimizing the square deviation of job completion times under SLK due-dates

首先利用主成分分析法，通过DPS数据处理系统，对15个指标因子进行降维处理，确定出主成分，然后运用系统聚类方法中的离差平方和标准对山东省进行灌溉农业分区。

Make use of the Principal Component Analysis Method to make sure of the principal component , through dealing with 15 indexes by the DPS data processing system , and then make use of the Clustering Analysis to carry on the dividing zone for the agriculture irrigation .

笔者用其中4种新策略，即新组内离差平方和法、新组内方差法、新组内平均距离法和加权平均距离法，对德国西北部Hopsten干草地进行了分类。

Four of them , sum of squares of new cluster , variance of new cluster , average distance of new cluster and weighted average distance were applied to the classification of dry grasslands in Hopsten , Germany .

离差平方和法在管理信息系统结构设计中的应用

The Application of Derivate Square in Designing the Structure of MIS

对大麦耐湿性比较研究的几种统计方法中，离差平方和法和隶属函数法对大麦进行耐湿性评价、分类较好。

Ward 's method and subfunction method were suitable for the evaluation or classification of waterlogging-tolerance of barley germplasm .

本文用修改了的系统聚类法研究华北地区地震活动期，结果表明，当类间距离用离差平方和增量距离，且样品间用欧氏距离时，能较好地划分该地区的地震活动期。

The Modified Hierarchical classification Method is used to divide seismic active periods of Northern China in this paper .

利用离差平方和法对生态种组进行等级聚类，结合实地调查结果，将48种蝗虫划分为三大类12个生态种组。

Adopted Sum of Deviation of Square to clustered ecological species groups , and thus divided 48 grasshopper species into 3 main category , 12 ecological species groups .

根据组平均法、离差平方和法、最近邻体法等三种聚类分析的结果，香港岛的森林群落可划分为三个植被亚型和七个群系。

From the results of cluster analyses , the lower subtropical evergreen broadleaved forests on Hong gong Island were divided into three sub-types and seven formations ( Fig. 1 ) .

应用计算机系统对随机小样本的14个性状数据进行聚类分析，选择确定了离差平方和法是芝麻资源聚类的适宜方法。

Based on the results from cluster analysis of 14 characters with random small sample by computerization , ward method was chosen as the best one for establishing sesame core collection .

结果表明可变类平均法、离差平方和法、可变法、类平均法和最长距离法的分类结果与常规分类结果符合程度高。

The results showed that the changeable average-linkage method , the sum of squared deviation method , changeable method , average-linkage method and furthest-neighbour method were well in correspondence with the conventional classification method .

本文从各种距离之间的关系来对重心法、类平均法及离差平方和法作一些分析比较。

By making an analysis of different relations of distance , method of gravity center , method of mean value of class and method of sum of squares of deviations are compared in this paper .

通过离差平方和聚类分析方法，将研究区的10个调查样地划分为6个类型。

According square sum of deviations ( Ward ) cluster analysis , we divide the 10 sampling plots into 6 types , the dominant plants in different plots varied with the changing of environmental gradients .

频率分析中最关键的步骤是适线分析和区域平衡，其中适线分析首选离差平方和准则及相对离差平方和准则等数学分析方法。

The key step in frequency analysis is curve-fit analysis and area balance . The first selection of curve-fit analysis is the mathematical analysis method of deviation square and criterion and relative deviation square and criterion .

为了减少计算量，本文推导了基于最小二乘估计的一系列递推公式，包括回归系数、总离差平方和、残差平方和、回归平方和等的递推公式。

This paper infer a series of recursive equation based on lease square estimation in order to reduce computing amount , include recurrence equation of regression coefficient , total dispersion square sum , residual square sum , regression square sum etc.

结果表明：保护区内现有大熊猫23只，竹林内生态密度为0439只/km2。此外，首次采用了离差平方和聚类的方法，将该种群划分为4个年龄组。

The results showed that there were 23 pandas in the reserve and the ecological density in bamboo forests was 0 439 giant pandas / km 2.The population could be divided into four age groups with the Sum of Square Method .

采用离差平方和聚类法，根据蛋白质性状和淀粉性状将100个品种（系）分别划分为具有不同特点的4个类别，为小麦品质改良提供了参考。

The results of cluster analysis with sum of squares for protein quality traits and starch quality traits showed that 100 wheat varieties can be divided into four groups with different characteristics , which could afford reference in wheat quality breeding .

结果表明：离差平方和法分类效果最好，用此方法将全区划分为5个生态经济区和8个生态经济亚区，取得了符合实际的分区结果。

The results indicate that the Ward 's hierarchical classification method is better than the others during this classification . The whole region was divided into 5 eco economic regions and 8 sub regions by using this method , and the results was good and objective .

最后分别计算49个站点不同历时离差绝对值和平均值、离差平方和平均值以及NSE值平均值。

Then , we can get some mean value , such as sum of absolute value of deviations and sum of squares of deviations and NSE for 49 towns of Fujian ' 9 cities mentioned above .