partial differential equation是什么意思

用法例句

Several enhancements have been made in Maple′s symbolic differential equation solver,with ode pde providing solutions to many equivalence classes of AbelODEs with constant and non-constant invariant.

在Maple数学软件中,符号微分方程式的解算功能有了很大的增强,ode-pde程序包允许处理带有常数、非常数不变式的Abel型微分方程以及大量与可积类等价的微分方程。

Near Infrared Spectra (NIR) Analysis of Octane Number by WaveletDenoising-Derivative Method;

结合小波变换与微分法改善近红外光谱分析精度

This paper analyzed the derivative MMM signal of pre-welding cracks,extracted the location feature of welding cracks and founded the quantitative relation between derivative MMM signal and parameters of welding cracks.

针对金属磁记忆检测技术目前尚不能对焊接裂纹进行定量的评价的问题,通过对预制焊接裂纹一阶微分后的金属磁记忆信号进行分析,找出了焊接裂纹存在定位特征,并且建立了微分后的磁记忆信号与焊接裂纹的长度及埋深的定量关系。

Derivative spectrum technique was applied to enhance the wheat canopy reflectance responsibility to different N levels.

采用微分技术处理了小麦冠层反射光谱,提高了其区分小麦氮素营养水平的灵敏性;利用F-检验及方差分析与相关分析,研究小麦氮素处理水平、冠层反射光谱及其衍生信息(光谱反射率的一阶微分数据、归一化植被指数)、小麦产量三者之间的相关关系。