عنوان مقاله [English]
The Date is dryness is a majer Problem in South ern Portsofiran. Despite lots of damages to this region economy,The main purposes of this study the effect of,UV, Ozon (O3) and climatological factors including temperature and relative humidity on date dryness. The study was done based on two models, Artificial Neurol networks well as regression model grade 3 which was made by the main component. Therefore, the two models results were analyzed and compared with each other while the determination index for former model was R2 = 0.999 and for the later one it was R2 = 0.92. However, it was revealed that the results of artificial Neurol networks were more exact. Consequently, it concluded that based on this study results there was a direct, positive relationship between the origin of the bunch of Mozafati dryness difficulty and the temperature, radiation and Ozon while it showed opposite relation with relativehumidity.