An important question in the theory of fracture is what kind lifetime distributions may exist for materials under load. Here, this studied context a one-dimensional model with local load sharing constant external load, “creep.” Simulations system Weibull distributed initial lifetimes elements show that limiting distribution follows from extreme statistics and takes Gumbel form eventually, longe...

Piston plays a vital role in almost all types of vehicles. The present study discusses the behavioral study of a piston manufacturing plant. Manufacturing plants are complex repairable systems and therefore, it is difficult to evaluate the performance of a piston manufacturing plant using stochastic models. The stochastic model is an efficient performance evaluator for repairable systems. In...

This paper presents a new mathematical model for a bi-objective job shop scheduling problem with sequence-dependent setup times that minimizes the weighted mean completion time and the weighted mean tardiness time. For solving this multi-objective model, we develop a fuzzy multi-objective linear programming (FMOLP) model. In this problem, a proposed FMOLP method is applied with respect to the o...

in this paper, the factors affecting the attitude of youth toward immigration have been examined, using a survey method and questionnaire. the sample under study consisted of 892 young people from shiraz. the theoretical framework of the research was based on the theories of giddens, bayen, izen, and lee’s theory of immigration and the experimental method of research was designed based on their...