To study the bioactive constituents of the fruit and the stem of Garcinia cowa,two polyprenylated benzophenones(a novel compound named Guttiferone K and an known compound Cambogin)were ob-tained,whose structures were elucidated by spectral analysis.

Experimental Research on Efficiency of Extinguishing Cooking Oil Fires by Water Mist;

A full-scale heat release rate platform for multifunctional measurement is used to study the interaction of water mist with cooking oil fires in an open space.

More effective algorithm for K-means clustering;

Research on segmenting color regions in textile printing image based on K-means clustering;

Collaborative filtering recommendation model based on effective dimension reduction and K-means clustering

Based on class K∞ functions,the more general definitions are proposed for kinds of finite-time stabilities,and the sufficient conditions are obtained by Lyapunov functions to ensure the finite-time stability of nonlinear systems.