TY JOUR TI EXPERT SYSTEM TRAINING TECHNIQUE TO EVALUATE WELDER’S JOB STABILITY KW weld joint KW artificial neural networks KW artificial neural network training KW weld defects KW expert system KW welding pro-cess stability KW analytical methods JO Vestnik of Don State Technical University AU Lukyanov, V.. AU Kuzmenko , I.. PY 2014 IS 14 PB Don state technical University