At the completion of this thesis, the author would like to deeply thank all those who have given care and help in their study and life during their postgraduate study. First of all, I sincerely thank the author's mentor Professor XXX and Teacher XXX. Today, the author can successfully complete the writing of the thesis, which embodies the hard work and sweat of the two teachers. The two teachers gave careful guidance on the topic selection, the determination of the research plan and the specific implementation process. Their rigorous academic attitude and systematic scientific research ideas have benefited the author for life. At the same time, I was deeply impressed by their approachable and approachable lifestyle. In the experimental part and writing process of Chapter X, Teacher XXX gave the author a lot of useful guidance and suggestions, and gave strong support during the implementation of the experiment. Here, the author expresses his heartfelt thanks. Thank you Mr. XXX, Mr. XXX, for giving the author many constructive suggestions in the writing process of this article. Thank XXX and XXX for their advice and help to the author in the experiment. Thanks to XX, XXX and other students for their encouragement and help in the process of writing the paper. The author will always remember the friendship he read with his classmates. Thank XX unit for providing experimental samples for the author. When the paper was finished, the author's heart was filled with gratitude, thanking his parents for their nurturing kindness and selfless support. After studying hard at the cold window for more than ten years, the author will never forget the sacrifices and selfless dedication made by his family here. Gratitude is endless, so we have to stop here.