n阶导数 meaning in English

derivative of n th order

A general estimation of the nth derivation of the function is presented by using the principle of the inductive model and the characters of the bounded functions
对有界正则函数族中的函数，根据最大模原理和有界函数的系数不等式，得到了n阶导数的准确估计式。
After introducing the conventional edge detection operator and multiscale wavelet edge detection operator , we discussed the well quality of b - spline function > n - class derivative of gauss function n harmonic function and hermite function in wavelet theory and their concrete application in the image edge detection
在对单尺度下的传统边缘检测算子和多尺度小波边缘检测算子介绍的基础上，讨论了b样条、 gauss函数的n阶导数、谐波函数以及hermite函数在小波理论中所具有的良好性质，以及它们在图像边缘检测中的具体应用。