The SPDR S&P Semiconductor ETF (XSD) is a strong buy, with solid returns, balanced risk, and growth potential. Read more ...

Abstract: Under weak grid, permanent magnetic synchronous generator (PMSG) is prone to occur subsynchronous resonance (SSR), which seriously threatens the security of power systems. First, the ...

Abstract: The upcoming exploration activities in the lunar south pole require high-resolution mapping products to support landing site selection and navigation. The special terrain and illumination ...