In the third section,we use variational method to construct the dual equation of wave equation,and through the dual equation to study the multiplicity of sultions.
3.第三部分,我们利用变分简化方法,构造了波动方程的对偶方程,通过这个对偶方程来研究解的多重性。
参考来源 - 非线性波动方程解的存在性·2,447,543篇论文数据，部分数据来源于NoteExpress
The viscosity change of a glue line with temperature and time could be described qualitatively by a dual equation.
在加热过程中，胶层粘度随温度和时间的变化可用二重指数方程描述。
The all-bending moment equation for dual continuous beam is derived on this basis.
并在此基础上，导出计算曲轴的双连续梁全弯矩方程。
Hydrocarbon saturation equation was set up according to T1 difference between hydrocarbon and water in dual polarization time NMR log.
从烃与水的T1差异着手，针对双极化时间核磁共振测井，可以建立含烃饱和度方程。
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