1. In doctoral dissertations, formulas are usually an important means for authors to summarize and express research results. Through the accurate description and derivation of the formula, we can express the research results more clearly, simplify the complex research results into concise and meaningful formulas, and improve the readability and understandability of the paper.

2. This formula can also provide an important reference for the follow-up research, and provide an important theoretical basis and practical guidance for researchers in related fields.