A sparse channel estimation method is proposed for doubly selective channels in multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(O
In order to reduce the risk of sealing and improve the structural strength for a coal mine mobile refuge chamber,a new type of one-piece model was designed.Mech
Based on finite volume method,subsonic and transonic flow in 3-D cavity of different lengthto-depth ratios are numerically investigated by using Navier-Stokes e