Enformasyon Teknolojileri Bölümü Koleksiyonu

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Browsing Enformasyon Teknolojileri Bölümü Koleksiyonu by Author "Management Information Systems"

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    Bayesian and Graph Theory Approaches To Develop Strategic Early Warning Systems for the Milk Market
    (Springer-Verlag Berlin, 2015) Gürpınar, Furkan; A. Bısson, Chrıstophe Louıs; Bisson, Christophe; Yaşar Diner, Öznur; Diner, Öznur Yaşar; Management Information Systems; Computer Engineering
    This paper presents frameworks for developing a Strategic Early Warning System allowing the estimatation of the future state of the milk market. Thus this research is in line with the recent call from the EU commission for tools which help to better address such a highly volatile market. We applied different multivariate time series regression and Bayesian networks on a pre-determined map of relations between macro economic indicators. The evaluation of our findings with root mean square error (RMSE) performance score enhances the robustness of the prediction model constructed. Finally we construct a graph to represent the major factors that effect the milk industry and their relationships. We use graph theoretical analysis to give several network measures for this social network
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    Double Branch Outage Modeling and Its Solution Using Differential Evolution Method
    (2011) Ceylan, Oğuzhan; Dağ, Hasan; Ozdemir, Aydogan; Ceylan, Oğuzhan; Dağ, Hasan; Management Information Systems
    Power system operators need to check the system security by contingency analysis which requires power flow solutions repeatedly. AC power flow is computationally slow even for a moderately sized system. Thus fast and accurate outage models and approximated solutions have been developed. This paper adopts a single branch outage model to a double branch outage one. The final constrained optimization problem resulted from modeling is then solved by using differential evolution method. Simulation results for IEEE 30 and 118 bus test systems are presented and compared to those of full AC load flow in terms of solution accuracy. © 2011 IEEE.