Now showing items 1-8 of 8

    • Bounds on risk-averse mixed-integer multi-stage stochastic programming problems with mean-CVaR 

      Mahmutoğulları, Ali İrfan; Çavuş, Özlem; Aktürk, M. Selim (Elsevier B.V., 2018)
      Risk-averse mixed-integer multi-stage stochastic programming forms a class of extremely challenging problems since the problem size grows exponentially with the number of stages, the problem is non-convex due to integrality ...
    • An exact solution approach for risk-averse mixed-integer multi-stage stochastic programming problems 

      Mahmutoğulları, Ali İrfan; Çavuş, Özlem; Aktürk, M. Selim (Springer, 2019)
      Risk-averse mixed-integer multi-stage stochastic programming problems are challenging, large scale and non-convex optimization problems. In this study, we propose an exact solution algorithm for a type of these problems ...
    • Multi-stage stochastic programming for demand response optimization 

      Şahin, Munise Kübra; Çavuş, Özlem; Yaman, Hande (Elsevier, 2020-02-19)
      The increase in the energy consumption puts pressure on natural resources and environment and results in a rise in the price of energy. This motivates residents to schedule their energy consumption through demand response ...
    • Risk-averse allocation indices for multiarmed bandit problem 

      Malekipirbazari, Milad; Çavuş, Özlem (IEEE, 2021-01-25)
      In classical multiarmed bandit problem, the aim is to find a policy maximizing the expected total reward, implicitly assuming that the decision-maker is risk-neutral. On the other hand, the decision-makers are risk-averse ...
    • A risk-averse approach for the planning of a hybrid energy system with conventional hydropower 

      Çavuş, Özlem; Kocaman, Ayşe Selin; Yılmaz, Özlem (Elsevier BV, 2021-02)
      We present a risk-averse two-stage stochastic programming model for the planning of a hybrid energy system with conventional hydropower component. Using Conditional Value-at-Risk as our measure of risk-aversion, we take ...
    • Risk-averse stochastic orienteering problems 

      Çavuş, Özlem (Eskişehir Teknik Üniversitesi, 2019)
      In this study, we consider risk-averse orienteering problems with stochastic travel times or stochastic rewards. In risk-neutral orienteering problems, the objective is generally to maximize the expected total reward of ...
    • Shelter site location under multi-hazard scenarios 

      Özbay, Ekmel; Çavuş, Özlem; Kara, Bahar Y. (Elsevier, 2019)
      Natural disasters may happen successively in close proximity of each other. This study locates shelter sites and allocates the affected population to the established set of shelters in cases of secondary disaster(s) following ...
    • The value of multi-stage stochastic programming in risk-averse unit commitment under uncertainty 

      Mahmutoğulları, Ali İrfan; Ahmed, S.; Çavuş, Özlem; Aktürk, M. Selim (IEEE, 2019)
      Day-ahead scheduling of electricity generation or unit commitment is an important and challenging optimization problem in power systems. Variability in net load arising from the increasing penetration of renewable technologies ...