A clustering result evaluating algorithm is presented in a gravitational way, where all the data points in the data space are regarded as the particles assigned with unit mass.
为了定量分析聚类算法的聚类结果，提出了基于引力概念的聚类质量评估算法。
At present, the current theories of the formation of the large-scale structure are essentially gravitational clustering theories based on the theories of the expansion of the universe and of density perturbations.
目前所流行的、关于大尺度结构的理论，基本上是以膨胀宇宙论和密度扰动的理论为基础的理论。
A new scaling analysis to the Vlasov equation which describes gravitational clustering is performed, and then it is argued with universe accelerative expanse modal.
利用描述引力系统演化的伏拉索夫方程的标度关系探讨了宇宙中星系团分布的一些标度律，并结合一个宇宙加速模型进行了讨论。
In particular, the rest-mass of neutrinos would have important influence on those cosmic problems related with mass density, such as the problems of whether the universe being open or not, the gravitational clustering in the universe, and so on.
特别是，对于那些与质量密度有关的宇宙学问题，例如宇宙的封闭或开放、宇宙中的引力成团过程等等，中微子的静质量有明显的作用。