You can also save the sender's pid and print it in a dump file to figure out who sent the signal.

您也可以将发送者的pid保存下来，并将其打印到一个输出文件中，从而了解是哪些进程发送的信号。

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The test result shows: this system can accomplish the functions of the visual displaying and autosave for collection signal, inquire about historical data and report print etc.

实验结果表明：该系统完成了对所采集到的信号的形象显示和自动保存以及对历史数据的查询和报表的打印等功能。

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The system's software include signal acquisition module, signal preprocessing module, character point detecting module, isochrone map construction module, output display and print module.

软件包括信号采集模块、信号预处理模块、特征点检测模块、等时图生成模块、输出显示和打印模块组成。

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