在java智能卡上实现电子票据业务功能，比如读写，删除 ，修改等待。-Java smart cards in electronic instruments to achieve business functions such as read, delete, modify, wait.

灰色系统理论的灰色综合关联矩阵，et为大于阈值时的矩阵。-Gray gray system theory correlation matrix, et is greater than the threshold matrix.