Math 类库，包含了Java 语言基础类库中没有的数学、统计学相关的基础工具。-Commons Math is a library of lightweight, self-contained mathematics and statistics components addressing the most common problems not available in the Java programming language or Commons Lang.

有理分式多项式法也称幂多项式法和Levy法，用于进行模态参数识别的数学模型采用频响函数的有理分式形式。