研究了灰色模型在自发脑电特征提取中的应用，同时给出了脑电信号特征提取的总体方案。
The application of gray model in feature extraction of spontaneous EEG signals is studied and the overall scheme of EEG feature extraction is presented.
从加强成本管理的角度出发，分析了原油单位生产成本特点，建立了原油单位生产成本的阶跃灰色模型。
From the reinforced cost management, it analyzed the characteristic of the crude oil unit cost, and the stepped grey model of the crude oil unit production cost was established.
为解决这一问题，研究了灰色组合模型在发动机研制费用估算中的应用。
This paper suggests Gray combined Model should be used in estimating the Engine Development Cost so as to solve the problem mentioned above.
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