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本文在不外加输入激励情况下，讨论了开环不稳定和非最小相位的ARMAX系统系数的一致估计。
Without introducing any external excitation to the system input, this paper gives consistent estimates for the coefficients of an ARMAX system, which is allowed to be unstable and of nonminimum-phase.
同时提出了知识库一致性维护操作方法，使机器学习获得的新知识在确认非矛盾和非冗余后输入到原始知识库中。
And this paper put forward a knowledge-base-consistency maintenance method which can input learning results into knowledge base after determining its non-contradiction and non-redundance.
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