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秦晓红 《数学物理学报(B辑英文版)》2009,29(5):1233-1240
An initial-boundary values problem in the half space (0, ∞ ) for p-system with artificial viscosity is investigated. It is shown that there exists a boundary layer solution. It is further proved that the boundary layer solution is nonlinear stable with arbitrarily large perturbation. The proof is given by an elementary energy method. 相似文献
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In this article, we investigate the global stability of the wave patterns with the superposition of viscous contact wave and rarefaction wave for the one-dimensional compressible Navier-Stokes equations with a free boundary. It is shown that for the ideal polytropic gas, the superposition of the viscous contact wave with rarefaction wave is nonlinearly stable for the free boundary problem under the large initial perturbations for any γ 1 with γbeing the adiabatic exponent provided that the wave strength is suitably small. 相似文献
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介绍一种试题库系统的功能和实现方法,该系统在Windows98下,以VB6.0作为开发平台,利用Access作为数据库实现,解决了题库组织与管理、题型难度匹配、试题自动生成和图文同时输出等问题。 相似文献
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随着微电脑技术的发展,利用微电脑作为调节器能更好地适应各种新型空调系统控制的需要,不仅能提高空调控制质量和系统可靠性,而且能使空调增加许多新的功能。基于模拟调节器的空调控制系统控制精度较低、控制功能简单、可靠性差,针对一种无氟空调的研制介绍利用单片机进行空调自动控制的实现方法。 相似文献
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