Is Spectral Unmixing Model or Nonlinear Statistical Model More Suitable for Shrub Coverage Estimation in Shrub-Encroached Grasslands Based on Earth Observation Data? A Case Study in Xilingol Grassland, China. - Zhengyong Xu; Bin Sun 008; Wangfei Zhang; Zhihai Gao; Wei Yue; Han Wang; Zhitao Wu; Sihan Teng (Remote. Sens., 2023)