geographical spatial difference
landscape spatial difference
spatial difference analysis
spatial difference matrix
spatial difference test
spatial evaluation model
spatial evaluation of eco-enviroment
time-spatial difference
color-difference evaluation
closed difference of height difference
difference in difference
difference in difference (DD) method
Difference-in-difference
log mean temperature difference; logarithmic mean temperature difference
logarithmic mean temperature difference; log mean temperature difference
temperature difference; logarithmic mean; log mean temperature difference