Reactive power dispatch for voltage profile modification has been of interest Abstract to powerr utilities. Usually local bus voltages can be altered by changing generator voltages, reactive shunts, ULTC transformers and SVCs. Determination of optimum values for control parameters, however, is not simple for modern power system networks. Heuristic and rather intelligent algorithms have to be so...

This paper  presents a new multi objective job shop scheduling with sequence-dependent setup times. The objectives are to minimize the makespan and sum of the earliness and tardiness of jobs in a time window. A mixed integer programming model is developed for the given problem that belongs to NP-hard class. In this case, traditional approaches cannot reach to an optimal solution in a reasonable...

many studies are performed by researchers about shell and tube heat exchanger but the multi-objective big bang-big crunch algorithm (mobba) technique has never been used in such studies. this paper presents application of thermal-economic multi-objective optimization of shell and tube heat exchanger using mobba. for optimal design of a shell and tube heat exchanger, it was first thermally model...

Nowadays, with extending applications of bi-layer metallic sheets in different industrial sectors, accurate specification of each layer is very prominent to achieve desired properties. In order to predict behavior of sheets under different forming modes and determining rupture limit and necking, the concept of Forming Limit Diagram (FLD) is used. Optimization problem with objective functions an...

For the 3D printing multi-objective optimization task scheduling problem, problem model is established from three aspects of related definition, constraint conditions, and objective function, which lays foundation for subsequent research solution.

In recent years, people have paid more and attention to traditional manufacturing's environmental impact, especially in terms of energy consumption related emissions carbon dioxide. Except for adopting new equipment, production scheduling could play an important role reducing the total a manufacturing plant. Machine tools waste considerable amount because their underutilization. Consequently, s...

This paper proposes a framework for time-efficiently finding multiple answers that meet logical constraints and are Pareto-optimal objective functions. The proposed determines set of optimal by iteratively replacing definite clauses. Clause replacement is performed using SAT solver consisting equivalent transformation rules (ETRs). An ETR replaces clause with one or more clauses while preservin...