在ansys10.0高频分析技术文档发现如下难以理解的冬冬

stealthact

4.4. Solving Harmonic High-Frequency Analyses

If Ne is the total number of HF119 tetrahedral elements and M is defined by M=(Ne/5)^(1/3), the number of DOFs for 1st order and 2nd order elements are 3M(M+1)(2M+1) and 6M(M+1)(4M+1)+8M3, respectively. If Ne is the total number of HF120 hexahedral elements and M is defined by M=Ne^(1/3), the number of DOFs for 1st order and 2nd order elements are 3M(M+1)2 and 6M(M+1)(3M+1)+6M3, respectively。

请教，有人对此作过了解吗？