查询词典 clustering

This paper proposes an algorithm of division and multi-level clustering with multi-strategy optimization,which bases on study of today's mature algorithms.

本文在研究已有成熟算法的基础上，提出了基于分治多层聚类的话题发现算法，其核心思想是把全部数据分割成具有一定相关性的分组，对各个分组分别进行聚类，得到各个分组内部的话题，然后对所有的微类再进行聚类，得到最终的话题，在聚类的过程中采用多种策略进行优化，以保证聚类的效果。

FCM algorithm is a clustering algorithm based on the division of its thinking is that it is making is divided into clusters with the greatest similarity between the object and different minimum similarity between the clusters.

FCM算法是一种基于划分的聚类算法，它的思想就是使得被划分到同一簇的对象之间相似度最大而，不同簇之间的相似度最小。

PCOS seemed to display a familial clustering phenomenon, 40.0% patients having family history. The research showed that the degree of oligomenorrhoea was more serious in the patients who had a family history and the rate of amenorrhoea was high (18.9%).

PCOS具有家族聚集性，有家族史的患者月经稀发程度较无家族史者严重，闭经发生率更高(18.9％)；激素水平上，T、黄体生成素值较无家族史者增高，差异有统计学意义，而月经初潮年龄、体重指数、E2和LH/FSH比值的增高无差别。

An adaptive grid scheme controlling cell area is used to generated grids in the divergent section of symmetric annular nozzle, and the generated grids are used in the flowfield calculation through the uncoupled way. The elliptic equations are used to generate grids in three dimensional regions of FDN divergent section, the source terms used in the equations employ a mathematical form which is independent of the boundary shape and of the boundary grid point distribution, the free parameters contained in the source terms are determined by the two restraint conditions, the intersection angle of transverse grid lines with boundaries and the local curvature of the transverse grid lines at the boundaries, and the interior grid distribution controlled directly by the grid point distribution assigned on the boundaries is realized, it makes the grid more clustering near the nozzle wall. For the generated grids in the whole computational regions have a good smoothness and orthogonality, the accuracy of calculation in the flowfield is ensured.

对轴对称的环形喷管采用控制网格面积的自适应网格方法对扩散段部分进行了网格生成，并通过非耦合方式应用于喷管的流场计算中；对强制偏流喷管扩散段内的三维区域采用椭圆型方程进行网格生成，方程中的源项采用了与边界形状和边界网格点分布无关的数学形式，源项内的自由参数由横向网格线与边界的交角及横向网格线在边界处的局部曲率两个约束条件来确定，实现了由边界上的网格分布直接控制内部的网格点，使壁面附近具有较密集的网格，并且在整个计算区域内的网格都具有良好的光滑性和正交性，从而保证了流场计算的准确性。

A new clustering algorithm is proposed based on particle swarm optimization and simulated annealing.

提出了一种新的基于粒子群和模拟退火的聚类算法。

You and I embrace like the annual ring breath listening attentively to the New Year ding , Aiyi who is clustering round our common dream , is having the heart filled with is molten doing the cordial blessing "Happy New Year"!

你我相拥倾听新年的钟声犹如年轮的呼吸，簇拥着我们共同的梦，满心的爱意化作真挚的祝福"新年快乐"！

Analytical expressions for their degree distributions and clustering coefficients are derived, which depend on the dimension of the associated Apollonian packing.

对HDRAN、V-HDRAN及EAN这三个网络模型的拓扑性质进行了解析计算和数值模拟，解析与模拟结果相吻合。

Relevant characteristics, such as degree distribution, the clustering coefficient, and the diameter of the three networks are determined using method in graph theory and combinatorics, all of which depend on the dimension of the associated Apollonian packings.

这类模型所使用的映射方式为通过网络理论研究现实系统的复杂性提供了很好的范例。

This method was applied to the dimensionality reduction of multidimensional time series via projection pursuit technique for fuzzy clustering. According to the results of the classification and the extraction of fuzzy rules through best value projection, three types of fuzzy membership function were generated using trapezoid distribution method. Then the sample's credit level was determined according to the fuzzy approximability in computation.

该方法利用投影寻踪技术对多维时间序列数据进行降维处理并进行模糊分类；根据分类结果和最佳投影值提取模糊规则，采用梯形分布法生成三个模糊隶属函数；最后根据计算模糊贴近度确定样本的信用级别。

If we apply the FNN in the control of a class of nonlinear dynamic systems a theorem shows that the static error of pursuit control can be small arbitrarily as long as clustering radius is small enough.

定理表明，将这种神经网络用于一类非线性系统的控制问题中，可使静态误差任意小，只要聚类半径足够小。

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。