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Abstract: The distributed acoustic sensing (DAS) system based on phase-sensitive optical time-domain reflectometry ($\Phi $ -OTDR) uses optical fiber as a medium to detect external vibration ...

Abstract: The second-order generalized integrator (SOGI)based phase-locked loop (PLL) is widely employed for phase and frequency synchronization. However, SOGIbased in-phase and quadrature generation ...

(Bloomberg) -- A handful of the worst performing companies in the IPO class of 2025 are staring down the risk of a “negative feedback loop” as selling restrictions for long-term investors and ...