Estimates of the Wind Protection Effect and the Relative Dynamic Speed above the Canopy of A Large Oasis Area Evaluation of Wind Protection Effect of Oasis Shelterbelts in China Effects of Coordinate Rotation on Precision of Heat and Latent Fluxes Estimating in Farmland Shelterbelts Algorithm Derivation of Winter Facies Wind Protection of Shelterbelts Structural Parameters and Wind Permeability Coefficient