spatial difference evaluation
vacuum pressure difference investment casting
investment evaluation index
safety investment evaluation
difference in difference
difference in difference (DD) method
Difference-in-difference
Actual investment Virtual investment Unity Disparity Harmony
Agriculture investment New guarantee system State fund supporting agriculture Credit fund Investment from the peasants
evaluation of hydrocarbon resources evaluation
evaluation of security evaluation
+ expression difference
27-point difference sheme
2kL method of the optical-path difference
2nd-order difference ARED
3-bands grads difference method
3-D explicit finite difference