Search Results - Hongjun Liu
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Stability Enhancement of Inverter-Based Microgrids Using Optimized Neural Networks
Published 2025-08-01Get full text[Objective] With the increasing penetration of power electronic devices，such as energy storage and photovoltaics，in microgrids，their low inertia and low damping characteristics pose challenges to the stable operation of microgrids（MGs）. To enhance the stability of inverter-based MGs，this study intro...
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A Tunable Dispersion Waveguide Based on Graphene–Silicon Lateral Slot Geometric Structure
Published 2017-01-01Get full textThe dispersion profiles of a hybrid graphene–silicon (HyGS) slot waveguide with trilayers of graphene are investigated in this paper. By tuning the bias voltage on graphene layer, the zero dispersion wavelengths (ZDW) of HyGS slot waveguide can be tailored dynamically and effectively. Wit...
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Ejection Fraction Indexed to Left Ventricular Mass and Its Association With Cardiac Event Risk in a Community Population With Mildly Reduced or Preserved Ejection Fraction
Published 2025-06-01Get full textBackground Although previous studies have suggested that left ventricular ejection fraction (LVEF) adjusted by left ventricular mass (LVM) might improve prognostic risk stratification of cardiac events, few prospective cohort studies have examined its clinical implications. We assessed the predictiv...
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