二階導
网络释义
二阶导数 second ; second order derivative ; arccos
二阶导数的对称性 symmetry of second derivatives ; Equality of mixed partials ; Clairaut's parameter ; Clairaut's formula
二阶导数光谱法 Second order derivative spectrophotometry
二阶导数试验法 Second Derivative Test
二阶导数谱学 second derivative spectroscopy
二阶导数分光光度法 secondary derivative spectrophotometry ; second derivative spectrometry
二阶导数光谱 second derivative spectrometry ; second derivative spectrum
二阶导数项 second order derivative
显示二阶导函数 Tweede afgeleide functie tonen ; de afgeleide tonen
二阶导数法 Second Derivative ; second derivative methods
双语例句原声例句
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它是位置向量的二阶导。
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采用基于二阶统计量的盲源分离算法对多导表面肌电信号进行处理，实现噪声的分离和表面肌电信号的初步分解。
Some methods of SEMG signal pretreatment based on blind source separation using second order statistics were proposed for noise separation and the elementary decomposition of multi-channel SEMG.
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最后认为这是由于偏振耦合项是二阶小量，而弱导近似忽略了与之相等的二阶小量耦合项。
It is because that the coupling term due to polarization and the ignored term due to the weakly guiding approximation are as small as the second order, and they are just the same.
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That means, when I take two derivatives, I want to get a, then you should know enough calculus to know it has to be something like at^, and half comes from taking two derivatives.
也就是说,当我想求二阶导时,得到了a,你应该有足够的微积分知识,才能知道必须有类似at^的项,而这个1/2则是因为求了两次导数
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