根据输入点组成线和面，并计算组成的凸多边形的质心、面积、是否和指定线交叉等-The input lines of dots and the surface, and calculate the composition of the convex polygon centroid, area, and whether the specified line cross, etc.

利用k均值聚类算法对词进行聚类,基于最大最小原则初始化质心-cluster word by kmeans

一种蓝牙定位的java程序，功能完善，实现质心定位，三边定位和最小二乘算法，通过布置蓝牙的位置，定位精度在0.5M左右-A bluetooth positioning Java program, the function is perfect, realize the centroid localization, trilateral positioning and least squares algorithm, through the arrangement of the position