Islamic Azad University, Rasht BranchIranian Journal of Optimization2588-57231120090401Sensitivity Analysis in Linear-Plus-Linear Fractional Programming ProblemsSENSITIVITY ANALYSIS IN LINEAR-PLUS-LINEAR FRACTIONAL PROGRAMMING PROBLEMS110513234ENBKheirfamDepartment of Mathematics Azarbaijan University of Tarbiat MoallemJournal Article20090101<span>In this paper, we study the classical sensitivity analysis when the right - hand </span><span>– </span><span>side vector, and the coefficients of the objective function are allowed to vary. </span>http://ijo.iaurasht.ac.ir/article_513234_15a6b1d77b3ad3dd97705805d8e343ef.pdfIslamic Azad University, Rasht BranchIranian Journal of Optimization2588-57231120090401Variational Iteration Method for Fredholm integral equations of the second kindVARIATIONAL ITERATION METHOD FOR FREDHOLM INTEGRAL EQUATIONS OF THE SECOND KIND1117513235ENJ.BiazarDepartment of Mathematics, Faculty of Science, University of GuilanH.EbrahimiDepartment of Mathematics, Islamic Azad University, Rasht branchJournal Article20090101<span>In this paper, He‘s variational iteration method is applied to Fredholm integral equations of the second kind. To illustrate the ability and simplicity of the method, some examples are provided. The results reveal that the proposed method is very effective and simple and for first fourth examples leads to the exact solution.</span>http://ijo.iaurasht.ac.ir/article_513235_4e84092b8a5c1431db8de14f4de6d7cd.pdfIslamic Azad University, Rasht BranchIranian Journal of Optimization2588-57231120090401A Nonlinear Mathematical model for Asthma: Effect of Environmental PollutionA NONLINEAR MATHEMATICAL MODEL FOR ASTHMA: EFFECT OF ENVIRONMENTAL POLLUTION1838513236ENNARESHARAMDepartment of Mathematics, Harcourt Butler Technological Institute
Kanpur -208002, IndiaAgrajTripathiDepartment of Mathematics, Bhabha Institute of Technology Aonha, Kanpur-209 204, IndiaJournal Article20090101<span>In this paper, we explore a nonlinear mathematical model to study the spread of asthma due to inhaled pollutants from industry as well as tobacco smoke from smokers in a variable size population. The model is analyzed using stability theory of differential equations and computer simulation. It is shown that with an increase in the level of air pollutants concentration, the asthmatic (diseased) population increases. It is also shown that along with pollutants present in the environment, smoking (active or passive) also helps in the spread of asthma. Moreover, with the increase in the rate of interaction between susceptibles and smokers, the persistence of the spread of asthma is higher. A numerical study of the model is also performed to see the role of certain key parameters on the spread of asthma and to support the analytical results.</span>http://ijo.iaurasht.ac.ir/article_513236_4bb6787406618581deb4f395b8a630c0.pdf