Enformasyon Teknolojileri
Recent Submissions

On the inverse pointsource problem of the poisson equation
Authors:
Publisher and Date:(Istanbul University, 2005)In this work a basic inverse heat conduction problem of a simple 2D model with steady state heat source is taken into view. The physical problem is for a square region with uniform thermophysical properties and a point heat source of unit magnitude. To obtain boundary data temperature probes are placed at the midpoints of the sides of the square domain. The objective of the inverse problem is to estimate the coordinates of the point source with the least amount of data. Initially the inverse ...

Electromagnetic interactions of heavy ions at small impact parameters and lepton pair productions
Authors:
Publisher and Date:(Institute of Physics Publishing, 2011)In peripheral collisions the strong electromagnetic fields are produced since the fully stripped heavy ions moves at ultrarelativistic velocities. Lepton pairs especially the electronpositron pairs are the result of this collisions. At the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) virtual photons produce many particles such as electronpositron pairs heavy lepton (muons and tauons) pairs magnetic monopoles Wpairs bquark pairs and possibly the Higgs. At small ...

Double branch outage modeling and its solution using differential evolution method
Authors:
Publisher and Date:(2011)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 ...

Bayesian and Graph Theory Approaches to Develop Strategic Early Warning Systems for the Milk Market
Authors:
Publisher and Date:(SpringerVerlag Berlin, 2015)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 predetermined map of relations between macro economic indicators. The evaluation of our findings with root mean square error ...