a characteristic of data envelopment analysis (dea) is to allow individual decision making units (dmus) to select the factor weights which are the most advantageous for them in calculating their efficiency scores. this flexibility in selecting the weights, on the other hand, deters the comparison among dmus on a common base. for dealing with this difficulty and assessing all the dmus on the sam...

This study aimed to investigate the high risk factors, cerebral palsy (CP) subtypes and comorbidities of periventricular leukomalacia (PVL). Based on treatment conditions at a specialist hospital, a cross-sectional clinical study and retrospective analysis of computed tomography and magnetic resonance imaging examinations was conducted to evaluate the risk factors, subtypes and comorbidities of...

Abstract The finite element simulation method is used to calculate and analyze the vibration frequency of aero-engine double connected gears with different common gear materials, numbers connecting pins, weight-reducing holes. analysis results are shown that first several modes caused by big gear, almost not affected number little while reduced increase weight reduction design avoidance referen...

background: low back pain is the most common cause of disability and absence from work among young and middle-aged people. as there is limited knowledge regarding this problem among iranian students, this study aimed to determine the prev­alence of low back pain and its ‘related socio­demographic factors among students of islamic azad university, tehran, iran.    materials and methods: two hu...

Regression models to predict leaf area and weight in common bean (Phaseolus vulgaris) were fitted using the three leaflets of leaves. A total 1504 leaves from 40 genotypes collected, covering a large range sizes. Width, length, area, measured for each leaflet. The was obtained by sum left, central, right leaflets. dataset randomly divided into training validation sets. set used model fitting se...