中文摘要：

建立了半空间上双曲-抛物系统大初值问题光滑解的全局存在性和渐近行为。跟以前相关的结果相比，他们都要求各种小初始条件假设，我们能够证明半空间上双曲-抛物系统任意大初值问题光滑解的整体存在性和渐近行为。对此的证明是基于构造一个非负凸熵和做精细的能量估计。

英文摘要：

We establish existence and asymptotic behavior of global smooth solutions to the half space problem for a hyperbolic-parabolic system with large initial data. Compared to the previous related results, where various smallness conditions on initial data were proposed, we are able to prove global existence and asymptotic behavior of smooth solutions to the half space problem for a hyperbolic-parabolic system with arbitrarily large initial data. The proof is based on constructing nonnegative convex entropy and making delicate energy estimates.