Keywords Exact controllability, Semi-global classical solution, Quasilinear hyper-bolic systems, Quasilinear wave equations, Higher order quasilinear hyperbolic equations.;

• 精确能控性;半整体经典解;拟线性双曲型方程组;拟线性波动方程;高阶拟线性双曲方程.；;