...诊断是分类识别问 题, 我们感兴趣的也是信号的概貌特征, 所以舍弃 分解后的细节系数, 保留近似系数(approximation coefficients) 作为故障特征, 后面将结合实例进行 详述。
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The approximation coefficient from wavelet decomposition includes much information relating with device reliability and is more sensitive to the change of device performance.
小波分解后的概貌信息，具有更多的可靠性细节信息，对器件性能的改变更敏感。
Raman gain coefficient is drawn from an insert valve of a Raman profile instead of triangle Raman profile approximation.
利用拟合图谱通过插值得到拉曼增益系数代替传统的将拉曼增益谱近似为三角形的方法。
On the assumption that the product of volume thermal expansivity and bulk modulus based on the thermodynamic approximation theory, a new equation is presented for volume thermal expansion coefficient.
根据热力学近似理论，在对体积热膨胀系数和体积弹性模量的乘积进行假设的基础上推导了一个体积热膨胀系数与体积和温度间的关系式。
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