| 1. | Include : direct sum code , cartesian product co de , tensor product code , extend hamming code ; and 7 - th part , we summarize the total paper , and put forward some problem which should be solved in perhaps development direction in the future . in the paper , main results gather in the 3 - rd , 4 - th , 5 - th , 6 - th part 第七章对全章作了一个总结,并对未来可能的发展方向提出了一些有待研究的问题。本文的主要结果集中在第三章、第四章、第五章、第六章。 |