产生高斯脉冲的前15阶导函数。该函数的输入参数为：矢量t定义时间轴；高斯脉冲导函数的阶数k，取值范围[1，15]-have a Gaussian pulse of 15 derivative function. The function of the input parameters : vector defined time frame t; Gaussian pulse derivative function of order k, value in the range [1,15]