نتایج جستجو برای ' SBM '

 Evaluating performance is an important issue, which is participated in every operation. In the context of performance evaluation, data envelopment analysis (DEA) is a pioneer tool and in the DEA models, slack-based measure of efficiency (SBM) model is the best. Yet in fuzzy slack based measure of efficiency, there was not a method that can evaluate systems with more than one fuzzy inputs and outputs. By considering this, that estimating all activities with crisp numbers is not available in...

 The present paper mainly deals with the prediction of blast-induced ground vibration level in Bakhtiary formation at intake of waterway system in Gotvand dam, Iran. For this research the ground vibration components were recorded carefully by means of 3 sets of vibration monitors for 32 blasts during bench blasting in front of tunnels. Then, the data pairs of scaled distance and particle velocity were analyzed by using the USBM equation. At the end of the statistical evaluations, a relation...

 Ground vibration (GV) is a blasting consequence and important for the mining and civil projects. Ground vibration level is adjusted by different parameters including rock type, charge per delay and distance from the blast. GV predictor models are mainly developed considering these parameters. However, mostly presence of the water as an influential factor has been neglected. In this paper, an attempt has been made to modify USBM model by incorporating the effect of water. The developed mode...