We present a method to enhance the accuracy of platform-based, high-frequency (HF) direction-finding (DF) systems using dynamic mode selection.To improve bandwidth and efficiency, the metallic platform supporting the DF array is used as the primary radiator by employing electrically small antennas to excite linearly independent combinations of its
With the rapid development of the Internet and changes in consumer buying habits, many manufacturers are increasingly relying on online channels to sell their products as opposed to traditional retail channels.In this study, we innovatively investigate the impact of corporate social responsibility (CSR) and consumer green preferences (CGP) on suppl
The Internet environment offers more and more knowledge resources as well as more and more better portals and educational platforms, creating a variety of learning opportunities, vocational training and improvement.Network resources have now become an important space educational - and self-education - of young people.Research carried out by me in 2