由于客人入住是一个随机过程，难以用准确的分布函数来描述，但作出某些合理的假设后，可将其变为平稳随机过程。
The registration of guest is in a random, it is difficult to describe by accurate distributed function, but it can be changed to stationary random process after making some rational assumption.
考虑在可数背景状态下，时间离散的拟生灭过程(QBD过程)平稳分布的尾概率的渐近态。
We consider asymptotic behaviors of stationary tail probabilities in the discrete time quasi-birth-and-death (QBD) process with a countable background state space.
模拟结果表明，该浇注系统填充过程平稳，温度场分布均匀，所得压铸件气体夹杂和冷隔缺陷少，整体质量较高。
Simulated results show that obtained parts has few defects, such as inclusion and cold shut due to smooth mold filling and uniform distribution of temperature field.
模拟结果表明，该浇注系统填充过程平稳，温度场分布均匀，所得压铸件气体夹杂和冷隔缺陷少，整体质量较高。
Simulation results show a smooth filling, uniform temperature distribution and few flaws such as gas inclusion and cold shut. A casting with a good quality was obtained.
多普勒超声血流信号是一个非平稳的高斯随机过程，其时频分布与血流的速度及其变化有密切的关系。
The Doppler blood flow signal is inherently a nonstationary Gaussian random process whose time-frequency representation associates with the time-varying velocity of blood flow and its variations.
地震动时程记录是一个明显的非平稳过程，不仅体现在时程幅值强度分布上，更体现在各频率成分上。
Currently, the traditional wave fitting processes makes the frequency of non-stationary greatly weaken, which oriented towards the goal of of response spectra for the intensity non-stationary fitting.
地震动时程记录是一个明显的非平稳过程，不仅体现在时程幅值强度分布上，更体现在各频率成分上。
Currently, the traditional wave fitting processes makes the frequency of non-stationary greatly weaken, which oriented towards the goal of of response spectra for the intensity non-stationary fitting.
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