1,690 research outputs found

    Hybrid power management system using fuel cells and batteries

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    In the future, hybrid power management systems using fuel cells (FCs) and batteries will be used as the driving power systems of ships. These systems consist of an FC, a converter, an inverter, and a battery. In general, an FC provides steady-state energy; a battery provides the dynamic energy in the start state of a ship for enabling a smooth operation, and provides or absorbs the peak or dynamic power when the load varies and the FC cannot respond immediately. The FC voltage range is very wide and depends on the load; Therefore, the FC cannot directly connect to the inverter. In this paper, we propose a power management strategy and design process involving a unidirectional converter, a bidirectional converter, and an inverter, considering the ship’s operating conditions and the power conditions of the FC and the battery. The presented experimental results were verified through a simulation

    Categorification of highest weight modules over quantum generalized Kac-Moody algebras

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    Let U_q(\g) be a quantum generalized Kac-Moody algebra and let V(Λ)V(\Lambda) be the integrable highest weight U_q(\g)-module with highest weight Λ\Lambda. We prove that the cyclotomic Khovanov-Lauda-Rouquier algebra RΛR^\Lambda provides a categorification of V(Λ)V(\Lambda)

    Clinical Application of CO2 Laser

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