Different methods are available for simultaneous optimization of cross-section, topology and geometry of truss structures. Since the search space for this problem is very large, the probability of falling in local optimum is considerably high. On the other hand, different types of design variables (continuous and discrete) lead to some difficulties in the process of optimization. In this articl...

One of the key issues in mining is the hauling system. Truck and shovels are the most widely used transportation equipment in mines. In this paper, a two-phase simulation-based optimization is presented to maximize utilization of hauling system in the largest Iranian open-pit copper mine. In the first phase, The OptQuest for Arena software package was used to solve the optimization problem to p...

With the rapid development of economic globalization and information technology, economic forecasting is emerging as a rapidly developing research field with wide applicability in business and government. To achieve an advanced position of global economic growth, one must quickly indentify good opportunities and take advantage of them in a fast and effective manner. More and more business organ...

Background: Changes in body composition may be used for monitoring progression/ regression of a disease. Prompt γ-rays in vivo neutron activation analysis (IVNAA) has been widely used for the measurement of body composition in recent years.Objective: In this paper, we tried to improve the safety of IVNAA operator.Methods: The most important factor for reducing the operator receiving dose is th...

The purpose of this paper is to answer the following question: Are pure braid groups on compact, connected surfaces bi-orderable? We will prove that the answer is positive for orientable surfaces, and negative for the non-orientable ones. In this section we give the basic definitions and classical results. We also explain what is known about orders on braid groups, and finally we state our resu...

In order to solve the two-sided matching problem based on uncertain score information, a new method is presented. Firstly, the description of the two-sided matching problem with uncertain scores is given. Secondly, the satisfaction degrees of each agent towards the agents on the other side are calculated. A multi-objective optimization model to maximize the satisfaction degrees of agents is set...

This paper deals with fair optimization problems where several agents are involved. In this setting, a solution is evaluated by a vector whose components are the utility of the agents for this solution, and one looks for solutions that fairly satisfy all the agents. Lorenz dominance has been proposed in economics to refine the Pareto dominance by taking into account satisfaction inequality amon...