查询词典 partitional

The best theoretical solution to a partitional clustering problem is to find all possible partitions and choose the partition that minimizes the objective function. However, the enumeration of all possible partitions is impractical even for data sets of moderate size. Therefore, as an alternative, most partitional approaches use an iterative optimization technique. And this could be cause local minimum.

本文在分析了目前聚类的基本方法的基础上，指出以K平均法等为代表的分割聚类虽然理论上找到类的所有划分并使得目标函数最小就可以获得最优解，但由于对于相当尺度的数据集列举所有可能的划分并不现实，因而多数分割方法采用迭代优化技术作为变通。

The 2D images were obtained by the partitional microphotography on each brain section.

采用分区显微摄影法，获取每张脑组织切片的二维图像。

Finally, the problems existing in these algorithms and the prospects of the fuzzy partitional algorithms are discussed.

最后总结了基于划分的模糊聚类算法普遍存在的问题及其发展前景。

And, do not ought to send the partitional basis "on this account as " more.

而且，更不应该以此作为&门派&划分的依据。

This concept is used to choose partitional attributes in the algorithm of decision trees construction.

利用该概念在决策树构造过程中选择划分属性，设计了基于离散度的决策树构造算法DSD。

Fuzzy partitional clustering algorithms are widely used in pattern recognition field.

在众多聚类算法中，基于划分的模糊聚类算法是模式识别中最常用的算法类型之一。

On the basis of system dynamic, we summed up 3 different patterns between variables, and put forward the theory of partitional modeling.

以系统动力学的基本概念、方法为基础提出了存在于变量之间的3种基本关系模式，并在此基础上提出针对复杂系统的分块建模理论。

In the process of constructing a decision tree,the criteria of selecting partitional attributes will influence the eficiency of classification.

在构造决策树的过程中，分裂属性选择的标准直接影响分类的效果。

In the process of constructing a decision tree, the criteria of selecting partitional attributes will influence the classification accuracy of the tree.

在构造决策树的过程中，属性选择将影响到决策树的分类精度。

Clustering has been discussed and applied in many areas, and K-means algorithm is one that best represents of Partitional clustering algorithms.

分群在许多领域被广泛的讨论与应用，其中K-means Algorithm是分割式分群演算法的代表。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。