Keywords: الگوریتم ژنتیک مداوم; PEUF; polymer enhanced ultrafiltration; PEI; polyethyleneimine; MW; molecular weight; MWCO; molecular weight cut-off; PFI; performance index of the membrane (L/m2Â h); ANN; artificial neural network; BP; back-propagation; MLP; multi-layer perceptron; MSE;