Wireless communications from air to fresh water are studied here. Our analysis relies on plane wave propagation mod-els. Specifically, the transmission loss and
Basing on the transformation optics, we propose a kind of transformation method of compressing or stretching. With the method, we propose a design of transparen
The inverter is used as the power supply of modern permanent magnet synchronous motor (PMSM). The inverter may produce harmonics in inversion process and form h
It is very important for the car users to have several communication systems and many antennas, which respond to the demands of aesthetics and efficiency. In th