A chip-scale atomic clock. HU DONGDONG/FOR CHINA DAILY China has taken a significant step in high-precision timekeeping by mass-producing a fingernail-sized chip-scale atomic clock that is accurate to ...

Abstract: To address the limitation that existing control strategies for multi-train system can only achieve asymptotic stability under the disturbance, and that the tracking errors remain relatively ...

Abstract: This paper proposes Kalman filter algorithms for unobservable systems. The proposed algorithms are effective in the time scale generation by atomic clock ...