稀疏矩阵是矩阵中非零元小于零元的矩阵，按照压缩储存的概念，只储存稀疏矩阵的非零元。除了储存非零元的值外，还要同时记下它的行列位置。这样，稀疏矩阵就可以用一个三元组表确定。应为是矩阵，所以要用到TSMatrix的存储结构，来存储矩阵的三元组表。-Sparse matrix is non-zero matrix element of the matrix is less than zero, in accordance with the concept of compressed storage,