标题： 平面对称模型与恒定减速度参数 显示英文标题

标题： Plane symmetric model with constant deceleration parameter

摘要： 一个具有恒定减速度参数$q=\alpha-1$的平面对称 Bianchi I 模型被考虑，其中$\alpha\geq0$。 该模型中$\alpha=0$在整个演化过程中违反了 NEC，因此提供了一个物理上不现实的场景。 该模型中$\alpha\neq0$在晚期遵守 NEC 和 WEC，这表明在这种情况下，这些模型可以产生一个物理上现实的宇宙学场景，尽管仅在有限的时间内。 还表明，这两个模型的物理和运动学行为与 LRS Bianchi I 模型相似。 显示英文摘要

摘要： A plane symmetric Bianchi I model is considered with constant deceleration parameter, $q=\alpha-1$, where $\alpha\geq0$. The model with $\alpha=0$ violates the NEC throughout the evolution, and hence provides a physically unrealistic scenario. The model with $\alpha\neq0$ obeys the NEC and WEC at late times, which shows that the models in this case can render a physical realistic cosmological scenario, though for a restricted period of time. It is also shown that the physical and kinematical behaviour of both models remain similar to an LRS Bianchi I model.