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.

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该模型具有数值可加型标准综合函数所具有的性质，即单调性、有界性和幂等性。

This model occupies some properties of additive standard synthesis function, namely, monotonic, limited and idempotent.

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得到了既约剩余系中同阶元的等幂和的一系列性质及其计算公式，并给出了证明。

This article has obtained a series properties and a calculate formula of the sum of the equal powers of the elements of the same order in the reduced residue system.

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