The subcooled boiling states were visualized by Shadowgraph visualization technique and the pressure oscillation was measured by the pressure sensor. 在过冷态超流氦沸腾中,运用可视化方法对不同过冷度下的沸腾过程进行了观测,同时运用压力传感器详细研究了沸腾过程中的压力振荡。
The existence and stability of the optimal control is established based on the parabolic regularization method and the weak convergence technique. 用抛物正则化方法和弱收敛技巧,证明了最优控制的存在性和稳定性。