A time scale t is an arbitrary nonempty closed subset of the real numbers . in the paper , we study quasilinearization and the monotone iteration methods for second - order nonlinear boundary value problems on time scales 時(shí)間模t _ 1是實(shí)數(shù)集上的一個(gè)非空閉子集,本文討論了時(shí)間模上二階非線性邊值問題的擬線性方法和單調(diào)迭代方法。