(1) The derivation and proof process of the excessively long formula in this paper can be given in the appendix;

(2) Analysis, proof and tools that are closely related to this article by non-authors;

(3) The experimental data that can't be listed in this paper. Papers, patents, awards and social evaluations published during school study.

At the end of graduation thesis, students' published papers, patents obtained, awards, appraisals and social evaluation of project realization and related materials should be attached (generally, only a list of contents can be written).

Thank you:

After half a year's busy work, this graduation project is coming to an end. As an undergraduate, due to lack of experience, there are inevitably many thoughtless places. Without the supervision and guidance of the tutor and the support of the students who work hard together, it is unimaginable to complete this design.

First of all, I want to thank my tutor. The teacher is busy on weekdays, but he gave me careful guidance at every stage of my graduation design, from going out for internship to consulting materials, determining and revising the draft design, and mid-term inspection. Besides admiring the teacher's professional level, his rigorous academic attitude and scientific research spirit are also examples for me to learn forever, which will have a positive impact on my future study and work.

Secondly, I would like to thank other students who completed the graduation project with me. They worked hard on the design, overcame many difficulties and undertook most of the workload. Without their efforts, the completion of this design will become very difficult.

Then I want to thank all the teachers in the university, who have laid a solid professional knowledge foundation for me. At the same time, I also want to thank all the students. It is because of their support and encouragement that this graduation project can be successfully completed.