利用正交向量法求Lorenz系统的李雅普诺夫指数，并绘出指数谱图。-Orthogonal Vector Method Lorenz system, Lyapunov exponent, and draw the index spectrum.

Lyapunov exponent solving, By viture of this prompt, you can solve the lyapunov exponent of linear and nonlinear dynamic systems, for example duffing equation, Lorenz equation, henon and Vdp equation etc.