查询词典 clustering

The results showed that the average heterozygosity was higher in 9 populations,the lowest is Jinding, the highest is San sheldrake, which ranged from 0.5137~0.6055. The average heterozygosity of 9 duck populations was 0.5523, which reflected the rich diversity. Considerable breed differentiation was observed and 25.65% of the total genetic variation came from breed differences, this result affirmed each breed was of own genetic diversity. The DA genetic distances suggested the longer differentiation existed between those breeds. The domestic duck breeds in East China were clustered into four groups based on the NJ clustering, the clustering results had some relationship with the distributions and economic utilizations of these duck breeds.

结果表明：9个品种的平均杂合度都较高，最低的为金定鸭，最高的为山麻鸭，杂合度范围为0.5137～0.6055，群体平均杂合度为0.5523，反映了各鸭种的杂合度都较高，遗传多样性丰富；华东区各鸭种间存在较大的遗传分化，25.65%的遗传变异来源于品种间的差异，更进一步反映了各品种具有本品种特征特性的多样性；通过计算DA遗传距离发现各群体的遗传距离较远，分化时间较长；NJ聚类结果将华东区家鸭资源聚为4类，NJ的聚类结果分析与几个鸭品种的地域分布和经济用途有一定关系。

The results show that the algorithm not only avoid brining the stagnancy in clustering but also is a effective clustering method.

实验仿真表明，此算法不仅很大程度上避免了聚类过程停滞现象的发生，而且是一种有效的优化聚类方法。

Firstly, 112 symptoms of asthenia syndrome which frequency greater than or equal to 10% were clustered and recognized. Secondly, every group cases of asthenia syndrome after first stage clustering were clustered and recognized again to get corresponding sthenia syndrome. Thirdly, we searched for the distribution laws between the clustering result and the data of demography to get the distribution laws of every group characteristic symptoms corresponding asthenia syndrome, of sthenia syndrome corresponding every group asthenia syndrome.

首先根据频率大于10%的112个虚证症状进行聚类识别，再对聚类结果中每组虚证病例进行兼夹实证聚类识别，并对聚类识别结果与性别、年龄等人口学特征之间分布规律进行探索，从而得出每类虚证对应的特征症状分布规律及程度，虚证证候对应的兼夹实证分布规律，以及各类主次证候间辨证关系及发展趋势，及其与性别、年龄等人口学特征的分布规律。

In the empirical analysis part, statistical descriptions on the sample funds are made firstly, which show that the actual distribution of each sample fund"s daily net value return possesses the characteristic of leptokurtosis. So it is necessary to add student T distribution and GED to capture such leptokurtosis characteristic other than normal distribution. Secondly, ARCH test shows that there exists volatility clustering in each sample fund"s daily net value return, so GARCH related models should be used to describe such volatility clustering characteristic.

实证分析部分首先对样本基金进行统计描述，得出其收益序列均存在尖峰厚尾特征，不服从正态分布，因此有必要在下面的VaR计算中加入T分布和GED分布来捕捉这种尖峰厚尾特征；并且经ARCH检验后得出收益序列存在明显的波动聚集性的特征，因此可以选择GARCH类模型来描述这种特性，经过模型筛选，得出最适合我国开放式股票型基金的收益波动性模型为GARCH(1，1)模型。

According to the comparison of delineation management zones between improved ant colony clustering and K-means clustering, management zones delineated by the former showed the features that soil physical properties had stronger uniformity within the subzone and more significant difference between subzones.

将改进的蚁群聚类分区结果与传统的K-均值聚类进行比较，前者分区结果表现出土壤物理特性区内均一性更强、区间差异性更加显著的特点。

For this purpose, this paper presents a novel clustering algorithm for these mixed data sets by modifying the common cost function, trace of the within cluster dispersion matrix. The Genetic Algorithm is used to optimize the new cost function to obtain valid clustering result.

为此，该文提出了一种基于GA的模糊聚类新算法，通过改进聚类目标函数将数值特征与类属特征相结合，从而实现具有混合属性特征数据的聚类分析；通过引入GA算法能够快速得到全局最优解，而且不依赖于原型初始化。

This paper introduces the fundamental mind of fuzzy clustering analysis and carries on clustering analysis using the transitive closure method.

比如遥感图像上的某个样本属于某个类别或不属于某个类别是一个模糊概念[1]，这些模糊概念便产生了经典分类学解决不了的困难，模糊聚类分析就应运而生了。

Therefore, this paper fuzzy clustering method, first of all to highlight the dangers of all kinds of mining coal seams of each index measured data as samples to establish fuzzy similar matrix, find the transitive closure, re-use to do clustering, plot dendrogram.

所以本文利用模糊聚类方法，首先把矿区内各种突出危险性煤层的各指标的实测数据作为样本，建立模糊相似矩阵，求出传递闭包，再利用做聚类，画出聚类图。

Fuzzy C-means clustering model is one of the well known unsupervised clustering techniques, which has been widely used.

模糊C均值聚类是一种经典的非监督聚类模型，已成功用于很多领域。

ABSTRACT: Random amplified polymorphic DNA was used in analysing the relationship among twenty-six speices of Amanita from Mangshan, Hunan. Of 40 primers, 6 ones generated reproducible RAPD profiles, and each one produced 1-10 bands. Two primers (OPG15 and OPH04) could differentiate 26 species of Amanita by its RAPD profiles. The similarity coefficients obtained from profiles generated by six primers among Amanita were about 20-60%. A dendrogram was constructed using average linkage clustering for clustering analysis. It indicated that there were two groups in 26 species and some species with ring and membranous volva clustered a group which coincided with morphological classification.

本文对采自湖南莽山的26种鹅膏菌属真菌进行了随机扩增多态性DNA分析，40个随机引物中筛选出扩增效果较好的6个引物，每个引物能产生1～10条DNA条带，获得的RAPD谱带清晰并呈现多态性OPG15、OPH04两个引物扩增的RAPD谱带能将26种鹅膏菌完全区分开来，通过6个引物的RAPD分析获得的平均相似性系数表明种与种之间的相关系数在20―60%之间，平均链锁聚类分析可将26种鹅膏菌分为二大类，且一些具菌环和苞状菌托的种类聚在一起，与形态分类基本相吻合。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。