“…Many researchers, especially scholars abroad, are increasingly interested, and great progress has been made in both theoretical research and practical applications. To solve (1), many algorithms have been proposed ( [4,5,6,7,9]). The basic idea of these algorithms is to transform (1) into an unconstrained optimization problem, or into a simple constrained optimization problem ( [4,7,9]), and then to use the Newton type algorithms or confidence region algorithms.…”