Szukana fraza: [Temat i słowa kluczowe = piecewise sparse approximation] lub [Temat i słowa kluczowe = proximal gradient] lub [Temat i słowa kluczowe = scattered data fitting] lub [Tytuł = A proximal\-based algorithm for piecewise sparse approximation with application to scattered data fitting] lub [Autor = Zhong, Yiun] lub [Autor = Li, Chongjun] lub [Autor = Li, Zhong] lub [Autor = Duan, Xiaojuan]