Abstract Predicting the vibration of circular sawing machine is very important in examining performance process, as it shows amount energy consumption machine. Also, this factor directly related to maintenance cost, such that with a small increase level vibration, cost increases large extent. This paper presents new prediction models assess An evaluation model based on imperialist competitive a...

Four calcined alumina abrasive particles [ultrafine (0.05 ?m), 3 ?m, 9 ?m and 20 ?m] with defined sizes were investigated for their effects on toothbrush abrasion, surface polishing stain removal in vitro . The existence of a critical particle size (CPS) was shown the first time tooth model system present study CPS ~2.3 d10, 4.3 d50 or 7.8 d90 abrasives apparent. values indicate that 10%, 50% 9...