查询词典 clustering

In this paper a new algorithm of mesh simplification based on vertex clustering is presented.

为此提出一种新的基于顶点聚类的网格简化算法。

According to the identification of fossil woods, it shows that they all belong to Araucarioxylon, with the stage age of Qixia, though there are some anatomical differences among them; Following two mathematical clustering analysis methods-analysis of variance and CSDM curve, metrical numerical values are quantitatively analysed, then, skew value of curve and its relationship with leaf longevity are showed.

经过鉴定研究认为，本区的木化石均属于松柏类中的南洋杉型木属，为栖霞阶化石；应用方差分析、CSDM曲线相关分析等数学聚类分析方法，对木化石标本的测量数据进行了定量分析研究，探讨了曲线偏差值与叶寿命的关系，认为本区二叠纪木化石均为常绿树种-南洋杉型木，但有可能存在落叶树种，且生长年限有较大差异。

Uniform random sampling is widely applied to many kinds of algorithms in data mining. It processes uniform distribution data set extremely effectively, but easily loses slight cluster and consequently decreases clustering accuracy, when the processing data set is skew distribution.

随机抽样技术已经广泛应用于数据挖掘的各类算法中，它在处理分布均匀的数据集时非常有效，但在处理分布比较倾斜的数据集时容易丢失小的聚类。

But the classical algorithms of clustering are aimless in searching the solution space and absent of semantic characters.

然而传统的聚类算法对解空间的搜索带有盲目性和缺乏语义特征。

Taking SeaWinds as an example, according to the multiple solution problem of wind vector retrieval and its ambiguity solution property, a wind vector retrieval algorithm was designed, which was based on the dynamic clustering niche genetic algorithm.

以SeaWinds散射计为例，根据风矢量反演的多解问题和模糊解特性，设计了一种基于动态小生境遗传算法的风矢量反演算法。

Taking SeaWinds as an example, according to the multiple solution problem of wind vector retrieval and its ambiguity solution property, a mind sector retrieval algorithm was designed, which was based on the dynamic clustering niche genetic algorithm.

以Sea Winds散射计为例，根据风矢量反演的多解问题和模糊解特性，设计了一种基于动态小生境遗传算法的风矢量反演算法。

For classification, a Support Vector Machine sorter was trained and the method of k-means clustering algorithm was developed.

在分类上，训练了SVM分类器和基于k-均值聚类的分类方法。

The results showed that different southernwood cultivars displayed different artemisinin contents, especially, the artemisinin contents of planting cultivars and the cultivars with coloured stem were higher. Further AFLP analysis indicated that a specific fragment was amplified respectively with the primers of EA04-MC05 and EA01-MC01. According to the differentia fragments, we clustering analyzed the 10 major kinds of southernwoods by utilizing WPGMA approach. However, there was no distinctly relativity between the artemisinin contents and diversity of AFLP analysis and just can distinguish, southernwood of Youyang county from Shapingba and Beipo in producing area which still illuminated that the heredity differentia of southernwood presented itself obviously in different area.

研究结果表明：不同的青蒿株系青蒿素含量不同，栽培株系和色茎株系青蒿素含量较高；进一步的AFLP分析表明引物组合EA04-MC05和EA01-MC01分别在高产青蒿株系和茎色青蒿株系中均能扩增出一条特异性条带；根据AFLP差异带，用WPGMA法对10个主要青蒿类型进行聚类分析，结果没有得到与青蒿素含量的明确关联，只是从产地上将酉阳青蒿与北碚、沙坪坝青蒿区分，说明不同地区青蒿的遗传差异较大。

The clustering for high-dimensional sparse data is one of important problem which need to be solved in the field of data mining.

在聚类分析的研究中，有许多问题亟待解决，尤其是针对高维稀疏数据的处理能力方面更为突出。

It is hard to cluster high-dimensional data using traditional clustering algorithm because of the sparsity of data.

在高维空间中，由于数据的稀疏性，传统的聚类方法难以有效地聚类高维数据。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。