As the time series, the gradual stability of community microclimate is a sign for the gradual maturity of community restoration.
逐渐趋于稳定的群落小气候是恢复群落逐渐成熟的表现，同时可以促进群落的进一步完善。
The stability conditions and the existing conditions of limit cycle of AR-type nonlinear time series models are given. Some special models are discussed.
为此给出了AR型非线性时间序列模型的稳定性条件及极限环存在条件，并对一些特殊模型进行了讨论。
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