该java文件内包括了矩阵的加减乘除，矩阵求逆，矩阵求秩，矩阵转置，数组从大到小和从小到大排序等常用算法，是工科同学算例的仿真必备

-The java file, which includes both matrix addition, subtraction, matrix inversion, matrix rank, matrix transpose, array descending and ascending order and other commonly used algorithms, simulation engineering students must study