For more than N months, with the guidance and help of teachers, I have basically completed the design and development of the system. Its function basically meets the requirements, but due to the short graduation design time, the system still has many unsatisfactory places, which need to be further improved. Here, I also want to thank my dear teachers and classmates. It is because of your help and support that I can overcome one difficulty after another until I successfully finish this paper.

I want to express my heartfelt thanks to my tutor. I benefited a lot from the words and deeds in the design. ... the teacher's careful guidance in my design is the fundamental reason why my design can go smoothly. His rigorous academic attitude, meticulous work style, profound knowledge and modest and prudent learning attitude have always influenced me and made me unforgettable and benefited a lot. Here, let me extend my deep respect and sincere thanks to him! In addition, in the process of system development, many students also gave me great help. Thanks to their help and cooperation, this system can be developed in time.

When the paper is about to be completed, my mood can't be calm. How many respectable teachers, classmates and friends gave me wordless help from the beginning to the completion of the thesis? Please accept my sincere thanks! Finally, I would like to thank my parents who raised me with great pains, and all those who helped me and cared about me. Thank you!