the scarcity of water resources and supply resources limitation, have caused an increasing gap between water supply and demand specially in recent decades in almost all regions of the globe. one of the best known solutions proposed by the economists is using the different water pricing approaches thereby obtaining the optimal allocation and social justice. to this purpose, this paper uses the p...

Climate change threatens economic and environmental stability requires immediate action to prevent counteract its impacts. As large investments are already going into mitigation efforts, it is crucial know how best allocate them in time among the alternatives. In this work, we tackle problem using optimal control methods obtain temporal profiles of their allocation either clean energy developme...

This study presents a capacitated multi-facility location-allocation problem with stochastic demands based on a well-known distribution function. In this discrete environment, besides the capacitated facilities, we can employee the capacitated sub-source of each facility for satisfying demands of customers. The objective function is to find the optimal locations of facilities among a finite num...

this paper addresses the mixed integer reliability redundancy allocation problems to determine simultaneous allocation of optimal reliability and redundancy level of components based on three objective goals. system engineering principles suggest that the best design is the design that maximizes the system operational effectiveness and at the same time minimizes the total cost of ownership (tco...

abstract—in this paper, the problem of secure transmission in two-hop amplify-and-forward (af) systems with an untrusted relay is investigated. to prevent the untrusted relay from intercepting the source message and to achieve positive secrecy rate, the destination-based cooperative jamming (dbcj) technique is used. in this method the destination sends an intended jamming signal to the relay. t...

background liver transplantation (lt) is the only treatment option for patients with advanced liver disease. currently, liver donation to these patients, considering priorities, is based on the model for end-stage liver disease (meld). meld score is a tool for predicting the risk of mortality in patients with advanced liver disease. however, few studies have so far been conducted in iran on the...