基于进入系统的时间，写操作具有幂等性(不管操作多少次结果都不变的性质，比如取绝对值的函数就具有幂等性)和交换性(操作顺序不影响结果，比如加法就具有交换性)。
Write operations are idempotent and commutative, based on the time they enter the system.
高架桥系统对周围环境的影响是通过高架桥的柱子而产生的，其特征是荷载位置不变，但大小随时间变化。
The effect of viaduct system on near environment is generated through the column of viaduct, so the characteristics of loads are that the action points do not change but the values change with time.
同时，考虑了连续时间线性时不变系统的渐近稳定性问题。
In addition, we consider the asymptotic stability of continuous linear time-invariable systems.
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