By using the perturbed-energy method, the exponential decay of the solution is obtained for the nonlinear wave equations with time-dependent coefficients and dissipative boundary condition.
利用能量法证明了具耗散边界条件和时间依赖系数的非线性波方程的能量指数衰减性。
The time-dependent ion transport equations were numerically solved along fixed magnetic flux tubes. The lower boundary (100km) condition is set to chemical equilibrium.
模型的地理轴和地磁轴是分开的，离子的输运方程沿固定的磁流管求解。
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