追赶法求三对角方程组 参数：a为下次对角元素向量, b是主对角元素向量,c为上次对角元素向量，f为右端向量-Chase method for three diagonal equations Parameter: A for the next diagonal element vector, B is the main diagonal element vector, C for the last diagonal element vector, f for the right side

有限元法求解mindelin板的固有特性和简谐响应-The inherent characteristics of finite element method mindelin plate and harmonic response