二阶导数

At the same time, the author studies the jump of the second derivative at the knots.The paper is arranged as follows.

同时，本文对插值函数的二阶导数在节点处的跳跃问题也进行了深入地分析。

The time rate of change of concentration is proportional to the second derivative of concentration.

浓度对时间的变化率成正与浓度对距离的二阶导数。这种关系被用于描述非稳定态扩散。

The second derivative of f with respect to x.

f对x的二阶导数。

Second derivative spectroscopy was used for experimental observation.

用二阶导数光谱法进行试验观察。

It is a new method that calculates vertical second derivative of gravity anomalies based on discrete cosine transform.

基于离散余弦变换(DCT， Discrete Cosine Transform)的重力异常垂向二阶导数的计算方法，是笔者提出的新方法。

The fluorescence spectrums of normal and diabetic urine were collected from 510 nm to 620 nm , the second derivative spectrums were used to process data.

在510 nm～620 nm范围内采集健康人和糖尿病患者尿样的荧光光谱，利用求二阶导数光谱的方法进行数据处理。

Most traditional algorithms of image edge detection use gradient maximum or zero-crossing based on gray discontinuousness on edge. They are affected easily by noise.

传统的边缘检测算子大都基于边缘的灰度不连续性，利用梯度局部最大值或二阶导数过零点来检测边缘，容易受噪声干扰。

Mostly, traditional arithmetic of image edge detection distill edge using gradient maximum or zero-crossing which bases on gray discontinuousness on edge, and it is affected easily by noise.

传统的边缘检测算子大都是基于边缘的灰度不连续性利用梯度局部最大值或二阶导数过零点来检测边缘，容易受噪声干扰。

Mostly, traditional arithmetic of image edge detection distill edge using gradient maximum or zero-crossing which base on gray discontinuousness on edge.

传统的边缘检测算子大都是基于边缘的灰度不连续性利用梯度局部最大值或二阶导数过零点来检测边缘，容易受噪声干扰。

Mostly, traditional arithmetic of image edge detection distill edge using gradient maximum or zero-crossing which base on gray discontinuousness on edge. They are affected easily by noise.

传统的边缘检测算法大都是基于边缘的灰度不连续性利用梯度局部最大值或二阶导数过零点来检测边缘，容易受噪声干扰。

Life. But the intrinsic way of the Internet by wire confines accessing and using of the network information.

然而，Internet固有的有线连接方式大大限制了人们对网络信息的访问和使用。

I have a strong persuasion that this is true .

我坚信这是正确的。