基于单片机at89c51的数据采集子系统完成对多路声信号的同步采集，并把数字信号保存到片外共享存储器中。

The data acquisition subsystem based on AT89C51 acquires multichannel acoustic signal synchronistically and stores digital signals in the Shared memory.

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保存当前信号设置。

Save the current set of signals.

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这个程序能让用户保存或脱机查看其账户和预订信息，以便在没有网络信号覆盖的地方继续使用。

The app caches-or makes available offline-user account and reservation information, in case he or she needs to access it while located in an area without network signal coverage.

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