One of the important problems in reducing of pollutant emission from DI and IDI diesel engines is trade-off  between soot and NOx. Split injection is one of the most powerful tools that makes the chance to shift the trade-off curve closer to origin.  At the present work, the effect of split injection on the combustion process and emissions of a cylinder IDI diesel engine under the specification...

Internet computing is facilitated by the remote execution methodology in which programs transfer to a destination for execution. Since transfer time can substantially degrade performance of remotely executed (mobile) programs, file compression is used to reduce the amount that transfers. Compression techniques however, must trade off compression ratio for decompression time due to the algorithm...

Background Progress in medical science and success in increasing the survival rate of vulnerable infants have raised the issue of future development in these children. This study aimed to investigate the relationship between small for gestational age (SGA) status at birth and developmental delay in children aged 4 to 60 months. Materials and Methods This study was a correlation descriptive thro...

in this study, by using minimum, maximum and mean daily interpolated data from asfazari data base, the changes of agro climatic indices analyzed in iran during 1962-2004. at first, the indices calculated for each pixels and then trend and slope value evaluated by nonparametric mann-kendal and parametric regression method. in total, the results showed that the indices have positive trend on the ...

Abstract The atmosphere introduces excess delays into the synthetic aperture radar (SAR) signal trajectory, especially in troposphere. InSAR atmospheric correction methods include use of SAR data and external water vapor products. latter is more effective. However, since removal effects should delay products direction line sight (LOS), it necessary to convert zenith total slant LOS direction. C...