variations in lighting are a problem for visual systems. in the current research, a new thresholding method using a 3d euclidian elliptical surface was defined and applied for plant detection purposes. the results showed that this method had lower type i error, type ii error, total error and mean square error compared with those of conventional segmentation methods. the method was evaluated for...

Conventional passive distribution networks are changing to modern active distribution networks which are not radial. Conventional load flow methods should be modified for new distribution networks analysis. In modern distribution networks distributed generation (DG) units are embedded with conventional and/or renewable resources. DG units are generally modeled as PV or PQ nodes which inject ...

Background: More than half of myocardial infracted (MI) patients have no conventional risk factors. Regarding the belief that opium addiction has a protective effect on heart diseases, addiction prevalence has unfortunately increased in recent years. This study was conducted to investigate the effect of opium addiction on patients with acute myocardial infarction. Methods: This case-control stu...

This research delves into investigating the effects of different soil management practices on soil physical properties, yield and yield’s components of irrigated wheat. This experimental design was administered in the form of the nested testing with three treatments (no tillage, low tillage and conventional tillage) and three replicates in some of the farmlands of Chenran Township. The results ...

in order to evaluation the effect of different crop rotation, fertilizer and protection managements on weed seed bank properties an experiment was conducted in close house experimental glass house on the soil of 5th year of organic rotation that is conducting in university of newcastle’s nafferton experimental farm. rotation was started with grass/clover for first two years and continued with w...