target background ratio
characteristic difference
target to non target ratio
Background field and Background value
difference in difference
difference in difference (DD) method
Difference-in-difference
(measure)target
三维黏性流动
目标 measured value 被测值
~(233)U isotopic target
1-D image of radar target
2010 biodiversity target
3D maneuvering target tracking
3D roll maneuver target