求解二维波动方程，包括论文，公式依据和程序源代码-Solving two-dimensional wave equation, including papers, formulas and procedures based on source code

多抽样率信号处理，旋转机械二维全息谱计算，计算多重分形非趋势波动分析matlab程序。- Multirate signal processing, Rotating machinery 2-d holographic spectrum calculation, Calculation multifractal detrended fluctuation analysis matlab program.