Although most people assume a few cases of bottled water are enough when disaster strikes, that's not always true. For example, anyone who relies on a CPAP machine knows that basic supplies won't cut ...

Abstract: A theoretical study on natural frequencies and mode shapes of perforated beams filled with ideal fluids is presented. In the analysis, it is assumed that the beams are simply supported at ...

Abstract: The variable-speed permanent magnet synchronous motors (PMSMs) have high harmonic contents in the current and wide variable speed range, which results in a wide frequency range of ...