Detection and Evaluation of Shield Damage Defects in Power Cables Using an Improved Dual-Frequency Time–Frequency Domain Reflectometry Kun Zhao, Stefano Grivet-talocia, Paolo Manfredi, Yuan Yan, Hongjie Li (2025) Detection and Evaluation of Shield Damage Defects in Power Cables Using an Improved Dual-Frequency Time–Frequency Domain Reflectometry, In: ENERGIES, ISSN: 1996-1073