Upgrade , model change and localization shall not lower the accessibility quality that was already offered.

升级,改型 、 和区域化不应降低原先已提供之无障碍功能品质.

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Then, introducing the markov forecast model to forecast model change tendency time. 3.

然后, 通过马尔科夫预测模型理论,实时预报模型变化的趋势.

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