查询词典 clustering

Direct difference is sensitive to noisy data, so a threshold limitation is given, which can not only filter the result from noisy data but also pick edge points up according men's desire. On the other hand, artificial intelligence is used for segmentation in reverse engineering. Because the essence of segmentation is clustering similar characteristics and self-organizing feature mapping is one function of neural network, SOFM network is used for segmentation in the thesis, coordinates and normal of data points is took as the characteristics vector.

第二种方法，基于双向角度微分的边点提取法，针对三维正交模型采用基于截面线的方式组织数据，此方法比基于曲率半径方法更简洁，不用进行曲面拟合，大大提高了计算速度；计算过程中由数据点的直接差分逼近微分，但直接差分对数据误差敏感，为此，本文提出了阈值过滤的方法，一方面过滤了数据误差在计算结果中引起的噪音，另一方面可以按照设计意图控制边点的提取；来决定是否提取光滑交接的边点。

A kernel-based fuzzy clustering algorithm for interval number is presented.

提出一种基于核方法的区间数模糊聚类算法。

Aimed at resolving the problems of sensitivity to noise and over-segmentation existing in traditional watershed algorithm, a new image segmentation method-CWAC is presented. First, an image is separated into a large number of small partitions by watershed algorithm and the characteristic parameters are calculated.

针对传统分水岭分割算法对噪声敏感和易于产生过分割问题，提出一种新的基于分水岭和蚁群智能聚类的图像分割方法(CWAC， Combining watersheds and ant colony clustering)。

On clustering the data space into a number of partitions, LBD extracts a distance and a simple bitmap representation called Bit Codefor each point in the database with respect to the corresponding reference point.

位码字符串比较时，按照维度贡献优先顺序，大大加快非候选点过滤。LBD利用特殊的B+树组织，降低I/O和距离计算代价。采用模拟数据和真实数据，实验验证了LBD具有更高的检索效率。

Forth chapter we symbolize numerical time series by clustering its attributes.

数值实验表明了这两种算法的效率高于已有的算法。

Small and medium-sized companies are more suitableto adopt the clustering ODI mode because of the multified investors in China.

鉴于我国对外投资主体的多元化，一些中小企业更适于采用集群式对外直接投资的方式。

This clustering algorithm can on-line partition the input data, pointwise update the clusters, and self-organize the fuzzy neural structure.

此聚类算法可以在线地划分输入数据，逐点地更新聚类，自己组织模糊神经网络的结构。

Based on the analysis of one-class classification, a clustering method based on one-class classification is put forward.

在分析一类分类方法最新研究成果的基础上，提出了基于一类分类的模式聚类方法，通过与传统聚类方法的比较，说明该方法对非线性数据处理聚类的优越性，并以某企业对供应商关系调查数据为例，将这种方法应用于企业供应商关系分析中。

It is natural that we should break the current framework of the one-level clustering algorithm for data stream, and put forward a more effective framework.

本文的主要工作是设计和实现了双层数据流聚类框架。

Quality control should include checks on clustering, optical density, sensitivity, and specificity.

质量控制包括检测聚集、光密度、灵敏度和特异性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐