In the implementation, we used the multiprocessing method in QNX to analyze the general flow chart of system, and divided the realization of dual downstream channel into three modules.

在具体实现上采用了QNX的多进程编程思想，对整个系统的流程进行了分析设计，将双下行信道的实现分为三个大的模块进行讨论。

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In May, the U.S. Justice Department's inspector general issued a report on the watch-list process, including a flow chart describing how anyone suspected of terrorist ties passes through a series of lists, the most serious of which includes the Transportation Security Administration's no-fly list.

CNN: Air terror suspect was in database, not watch list