Over time, you graduate quickly and your heart feels a thousand emotions!This paper, under the guidance of Dr. Chung Lulin, was written by Dr. Chung Lulin, who answered my questions one by one and helped me solve the problem very patiently, so I am very grateful for the teachings of Dr. Chung Lulin. Also, thanks to my classmates and friends, they were very cute beings in my school life and left me many good memories. I also want to thank my parents, they are quietly supporting with me and backing up my solid!