计算循环平稳信号的4阶累积量，很好的算法-for 4th cumulant of cyclonationary signals

用高阶统计量中的三阶累积量的切片谱实现对齿轮故障诊断的程序和例程.-Using higher-order statistics of the Third Order cumulant slice spectrum to achieve the gear fault diagnosis procedures and routines.