For skywave over-the-horizon radar, beamforming techniques are often used to suppress airspace radio-frequency interference (RFI) because the high-frequency band is shared by many devices. To address the problems that the traditional beamforming method is not capable of recognizing the...

Due to the lockdown regulations worldwide during the COVID-19 pandemic, the global aviation industry has been severely hit. This study focuses on the volatility estimation of stock indexes in the Chinese Airport Shipping Set (ASS) at industry-enterprise levels and identifies possible business...

Due to the lockdown regulations worldwide during the COVID-19 pandemic, the global aviation industry has been severely hit. This study focuses on the volatility estimation of stock indexes in the Chinese Airport Shipping Set (ASS) at industry-enterprise levels and identifies possible business...