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Your search keyword '"Dehghani, Maryam"' showing total 41 results
Start Over Author "Dehghani, Maryam" Publisher elsevier bv
41 results on '"Dehghani, Maryam"'

5. Inside-Ellipsoid Outside-Sphere (IEOS) model for general bilinear feasibility problems : Feasibility analysis and solution algorithm

Author

Abolpour, Roozbeh, Dehghani, Maryam, Hesamzadeh, Mohammad Reza, Abolpour, Roozbeh, Dehghani, Maryam, and Hesamzadeh, Mohammad Reza

Abstract

This paper deals with general bilinear feasibility problems. A nonlinear transformation is introduced that reformulates a general bilinear feasibility problem as a Linear Matrix Inequality (LMI) problem augmented with a single non-convex quadratic constraint. The single non-convex quadratic constraint has a regular concave constraint function. Due to the LMI part of this formulation, it is easier to analyze, and we prove that the solution space of this formulation is located inside several ellipsoids and outside a sphere. This leads to our proposed Inside-Ellipsoid and Outside-Sphere (IEOS) model for general bilinear feasibility problems. Then, the feasibility analysis of our proposed IEOS model is performed. The related necessary feasibility conditions and sufficient feasibility conditions are theoretically developed. Moreover, an iterative algorithm for solving our IEOS model is also proposed.Two applications including matrix-factorization problem in control systems and power-flow prob-lem in power systems are considered to evaluate the practicality of our proposed approach. Both problems are formulated as IEOS models. It is shown that our proposed model can provide more accurate solutions to these problems as compared to previous competing approaches in the relevant literature., QC 20230227

Published
2023
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11. Long non-coding RNA (lncRNA) H19 in human cancer: From proliferation and metastasis to therapy

Author

Hashemi, Mehrdad, primary, Moosavi, Marzieh Sadat, additional, Abed, Hedyeh Maghareh, additional, Dehghani, Maryam, additional, Aalipour, Masoumeh, additional, Heydari, Elaheh Ali, additional, Behroozaghdam, Mitra, additional, Entezari, Maliheh, additional, Salimimoghadam, Shokooh, additional, Gunduz, Emine Selda, additional, Taheriazam, Afshin, additional, Mirzaei, Sepideh, additional, and Samarghandian, Saeed, additional

Published
2022
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17. Proactive transshipment in the blood supply chain

Author

Dehghani, Maryam, Abbasi, B., Oliveira, Fabricio, Royal Melbourne Institute of Technology University, Department of Mathematics and Systems Analysis, Aalto-yliopisto, and Aalto University

Subjects
Blood supply chain, Healthcare operations, Stochastic optimization, Inventory management, Lateral transshipment
Abstract

The main objective when managing inventories in blood supply chains is to establish an efficient balance between the wastage and shortage of blood units. The uncertain demand and the perishable nature of blood units can result in over- or under-stocking and increase wastage and shortage costs. In this study, we analyze how a proactive transshipment policy can avoid future shortages in addition to mitigate wastage. We consider a network of hospitals with uncertain demand in which each hospital makes decisions on the quantity to order from a central blood bank and to transship to other hospitals in each review period. We formulate the problem as a two-stage stochastic programming model. To generate scenarios, the Quasi-Monte Carlo sampling approach is employed and the optimal number of scenarios is determined by conducting stability tests. We performed numerical experiments to evaluate the performance of the proposed model and investigate the potential benefits of the outlined proactive transshipment. The developed model is used to compare the optimized policy with the current practice in some hospitals in Australia and with a no-transshipment policy. The numerical results indicate significant potential cost savings in comparison with the current policy in use and the no-transshipment policy.

Published
2021

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