Tuesday's crash occurred at about 14:51 local time (06:51 GMT) following a signal system failure at a subway station on Line 10, Shanghai Shentong Metro Group said.
In the railway stationsignal computer based interlocking control system, there are high requirements for the reliability, availability and real time performance.
在铁路车站信号计算机联锁控制系统中，对系统的可靠性、可用性和实时性要求较高。
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In this paper a circuit of filter and shaping is provided for obtaining a better time service signal of the China Central Radio Station from a noised record.