摘要大连快轨交通3号线AF C系统是国内第一个自主研发并投入运行，完全以非接触式ic卡为车票载体(单程票用薄卡型)的自动售检票系统。

The AFC system of Dalian rapid rail transit line 3 is the first of its kind independently developed by China itself, which employs contactless IC card as the carrier of tickets.

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单程波算法可视为深度偏移的“逆运算”，这样可以很好地借用已知的深度偏移方法及其程序系统。

Since the one way wave equation modeling scheme can be considered as the inverse depth migration, we can use the current depth migration schemes and its codes.

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介绍一个DOS操作系统的菜单程序。

DOS menu programmed by using Novell Netware principles is presented.

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介绍一个DOS操作系统的菜单程序。

DOS menu programmed by using Novell Netware principles is presented.

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