This paper first introduces principles of synchronous and asynchronous identification based on time and events, and then gives a through analysis of security in dynamic identification techniques.
简要介绍基于时间、基于事件同步、非同步认证原理，分析了动态认证技术安全性。
A novel wavelength detection scheme is developed with the technique of dynamic filtering in scanning mode and of synchronous process in time domain, which is based on a tunable fiber grating.
基于光纤光栅调谐技术，提出了动态滤波扫描、时域同步处理的新型波长检测方案。
A hardware structure of a time synchronous device based on GPS is introduced, its working principle of this device is discussed, at the smae time its practical application is also introduced.
介绍了一种基于GPS的时间同步装置的硬件结构，论述了这种装置的工作原理，同时也介绍了它的实际应用。
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