Through these three months of busy work and study, the graduation thesis design is coming to an end. As a junior college student, due to lack of experience, there are inevitably many thoughtless places. Here, I sincerely thank my tutor for his supervision and guidance, and the support of my classmates who studied together, so that I can finish this graduation project on time.

In the process of designing my graduation thesis, I encountered many difficulties. I would like to thank my mentor, Mr. xxx, for his careful help and patient and meticulous guidance. My graduation thesis is very complicated, but teacher xxx corrected the mistakes in the picture seriously. In addition to admiring Mr. xxx's professional level, his rigorous academic attitude and scientific research spirit is also an example for me to learn forever, which will positively affect my future study and work and let me solve various problems encountered in my graduation project. At the same time, I would like to thank the leaders of our college and department for their teaching and concern. Thanks to all the teachers who have taught us professional knowledge in the university for three years. They are xxx, xxx, xxx, xxx, XXX ... thank you for your careful teaching.

And I thank my classmates and friends around me, who have given me countless concerns and encouragement and filled my college life with warmth and joy. Without their help, it is difficult to finish this graduation thesis. In my design, they gave me many valuable opinions and suggestions. At the same time, I also want to thank myself for not falling down when I encountered difficulties, but for finding the best way to solve the problem. Finally, thank my parents who gave birth to me and raised me. Thank them for their selfless love and their great sacrifices and efforts for my study.