·在矩阵中，若数值为0的元素数目远远多于非0元素的数目，并且非0元素分布没有规律时，则称该矩阵为稀疏矩阵，并用三元组表表示。该算法只扫描两遍原三元组表，就能够获得稀疏矩阵的转置矩阵(In matrix, if the number of elements 0 is far more than the number of non 0 elements, and the distribution of non 0 elements is not regular, it is called sparse matrix, and it is expressed by three tuple table. The algorithm only scanned the original three tuple table two times, and can obtain the transposed matrix of the sparse matrix.)