@mohsen That's simply untrue that under Ahmadinejad "quality" research was 23 times higher. I did as you stated and searched for quality of Iranian research (and yes I am being selective, as you are):
"In 2014, a member of Iran’s Academy of Sciences estimated that each year as many as 5000 theses—roughly 10% of all master’s and Ph.D. theses awarded in Iran—are bought from dealers. In a recent Google search, Behzad Ataie-Ashtiani, a civil engineering professor at Sharif University of Technology here who
has shined a light on the practice, says he found 330,000 links to paper sellers in Farsi. He estimates there are at least a couple thousand such operations in Iran. Iranian scientists publish about 30,000 papers a year in international journals,
a 20-fold increase since the 1979 revolution. Purchased publications “damage the reputation of large numbers of Iranian scientists who don’t cheat, and erode the trust of the international scientific community,” possibly endangering collaborations, says Hossein Akhani, a biologist at University of Tehran."