A greedy sparse approximation method for least squares collocation
Nijia QIAN, Xun ZHANG, Guobin CHANG, Hefang BIAN, Huachao YANG, Xiannan HAN
Acta Geodaetica et Cartographica Sinica . 2026, (5): 850 -865 .  DOI: 10.11947/j.AGCS.2026.20250474