Rotating the screen horizontally on iPhone helps you watch movies or Netflix, view PDFs, play games,... more conveniently and ...

By using two propellers that rotate in opposite directions, a ship can use less energy to move forward. New knowledge means ...

Abstract: The use of slow-speed low-altitude unmanned aerial vehicles (UAVs) is becoming increasingly widespread, and the characteristics of low-altitude, slow-speed, and small targets make them ...