...多元散射 校正法（Multiplicative scattering correcdon）、一阶导数法 （First derivative）、二阶导数法（Second derivative）等11种方 法进行预处理，应用OPUS光谱分析软件，通过PLS分析， 分别建立羊肉的近红外嫩度检测模型，分析各种光谱预处理 方法对模...
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二阶导数法 Second Derivative ; second derivative methods 二阶导数项 second order derivative ; Second order derivative ; second order derivative term ..
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二阶导数光谱法 Second order derivative spectrophotometry
二阶导数试验法 Second Derivative Test
二阶导数分光光度法 secondary derivative spectrophotometry ; second derivative spectrometry
二阶导数方法 second-derivative methods
二阶导数光度法 second-derivative spectrophotometry
二阶导数线性多步法 second derivative multistep methods
二阶导数卷积伏安法 second derivative convolution voltammtry
由求解失效概率的改进一次二阶矩法出发，给出了失效概率对中间变量分布参数偏导数的计算公式；
On the basis of the advanced first order and second moment method, the partial derivatives of the failure probability to the distribution parameters of the process variables were formulated.
对利用差谱—二阶导数分光光度法直接测定强干扰基体中微量组分的原理和实验方法进行了探讨。
A new method for determining directly trace component in interfering base by absorbance subtraction -second derivative spectrophotometry is proposed.
目前，红细胞边缘形态的检测一般都是利用传统的边缘检测方法，如边缘临近一阶或二阶方向导数法，利用简单的方法来检测边缘。
At present, the methods of edge detection of erythrocyte are using traditional theory such as edge one-order or second-order orient differential coefficient and using simple methods to detect edge.
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