Mathematical periodicals are in JCR area, and they are charged. Official website, a mathematical journal, found that the mathematical journal is located in the first area of JCR in the field of mathematics, and published a single paper of 65,438 US dollars +0.880 yuan, equivalent to 65,438 yuan +0.220 yuan. The efficiency of editing and reviewing manuscripts is very high, and the review and employment are relatively fast. This paper is about the mathematical deduction and analysis of the theoretical model of mechanical dynamics, and has recommended many foreign commentators in related fields. Mathematics is a mathematical magazine, which belongs to MDPI magazine and is an open magazine.