英语词汇“first derivative”的翻译、意思、用法、释义-英汉汉英双解词典-精炼在线网

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词汇	first derivative
释义	first derivative fə:stdiˈrivətiv 短语¹⁴⁴⁹⁷²⁺² 基本英英近义反义例句例句一阶导数 Noun: the result of mathematical differentiation; the instantaneous change of one quantity relative to another; dfx/dx近义词 derivative派生物differential差别的derived function数导函数differential coefficient导数 A mark used as a superscript to indicate thefirst derivativeof a variable.撇号置于右上角的符号，用以标明变量的第一个导数 The key of the algorithm is how to estimate the derived vector of the surface curve or the first derivative of the surface of revolution according to the given length or area constraint. 算法的关键在于如何利用已知的弧长或面积约束来估计空间曲线或旋转面的旋转曲线在节点处的导向量或一阶导数值。 cnki Bar code recognition is a matter of edge detection, which has long been done through the maximum value of the first derivative or zero crossing of the second derivative. 条码识别是一个边缘检测问题。长期以来，边缘检测都是通过一阶导数极大值或二阶导数零交叉进行的。 cnki Making use of the fourth-order compact difference formula of the first derivative term, anew high accuracy difference scheme for the two-dimensional convection reaction equation is proposed. 利用一阶偏导数项的四阶紧致差分算子，直接推导出了数值求解二维对流反应方程的一种新的高精度紧致差分格式。 dictall
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