由8253产生1ms延时，并在示波器上显示三角波-generated by the 8253 1ms delay, and the oscilloscope display triangular wave

一种层次聚类算法的并行改进，采用MPI编程，对三角矩阵的求解实现并行-A hierarchical clustering algorithm to improve parallelism, using MPI programming, parallel solving triangular matrix