说明：  这是一篇关于字典学习的国内最新版综述，详细的描述了不同字典学习模型下的典型算法，对于稀疏表示领域的同学有一定的参考价值和作用。
(This is a domestic latest edition of dictionary learning, which describes in detail the typical algorithms under different dictionary learning models. It has a certain reference value and function for the students in the sparse representation field.)