基于非线性方法的石油钻井轴承故障诊断_论文_中国测控网 关键词：故障诊断，近似熵，样本熵，神经网络 [gap=425]Keywords: fault diagnosis, approximation entropy, sample entropy, neural network
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Also, some relations of measures of non-compactness and entropy numbers, approximation numbers be discussed in this paper.
另外，还建立了非紧测度与熵数，近似数之间的一些联系。
Entropy, as a measure of uncertainty, can be used to describe the classification on approximation space (u, r).
熵作为对不确定性的一种度量，可用于描述近似空间(U, R)中对象的分类情况。
The orientational entropy term, in the mean field approximation form, is replaced by the one including the molecular short range correlations, so a new free energy expression is obtained.
用包括了分子短程关联的取向熵代替原来平均场形式的取向熵项，得到新的自由能表示。
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