...i ) 2 ( ) ( , ) ( , ) j ux vy F u v f x y e dxdy π ∞ ∞ ? + ∞ ∞ = ∫ ∫ ② 二维傅立叶变换对(Fourier transform pair) From 空域to 频域 ?∞ ?∞ ∫ ∫ 2 ( ) ( , ) ( , ) j ux vy f x y F u v e dudv π ∞ ∞ + ?∞ ?∞ = ∫ ∫ From 频域to ...
Physical meaning: the self-correlation function and the energy spectrum density function compose a Fouriertransformpair.
物理含义：能量信号的自相关函数与能量谱密度函数构成傅立叶变换对。
2
Relationship between the target scattering function and the echo signal is deduced to hold as a Fouriertransformpair by analyzing the texture of echo signal for a passive radar imaging system;
By using the Fouriertransform, the problem can be solved with a pair of dual integral equations in which the unknown variable is the jump of displacements across the crack surfaces.