Masalah sampah merupakan masalah yang sangat memprihatinkan di suatu daerah. Hal ini dikarenakan salah satu indikator dapat memberikan dampak negatif bagi manusia dan lingkungan sekitar jika tidak ditangani dengan baik. Model alokasi lokasi model digunakan untuk menentukan fasilitas guna meminimalkan biaya distribusi. Jika dikaitkan permasalahan sampah, maka jumlah Tempat Pembuangan Sementara (...

Maintaining the health of people during and after a disaster is one of the most important issues in disaster management. Blood products are among the essential items needed to save the human life and the lack of them may lead to significant losses in human health. In this paper a comprehensive mathematical model of blood products supply chain is presented to respond the need for blood products ...

cell formation problem mainly address how machines should be grouped and parts be processed in cells. in dynamic environments, product mix and demand change in each period of the planning horizon. incorporating such assumption in the model increases flexibility of the system to meet customer’s requirements. in this model, to ensure the reliability of the system in presence of unreliable machine...

In this paper recently developed mixed-integer programming (MIP) tools to the problem of optimal siting and sizing of distributed generators in a distribution network. Here three methodologies for solving the DGPP via mixed-integer linear programming (MILP) and mixed-integer nonlinear programming (MINLP) approaches are compared. The single MILP approach uses the well-known DC linear approximati...

 We consider a generalization of the classical quadratic assignment problem, where coordinates of locations are uncertain and only upper and lower bounds are known for each coordinate. We develop a mixed integer linear programming model as a robust counterpart of the proposed uncertain model. A key challenge is that, since the uncertain model involves nonlinear objective function of the ...

This paper considers the Tchebychev distance for a facility location problem with a probabilistic line barrier in the plane. In particular, we develop a mixed-integer nonlinear programming (MINLP) model for this problem that minimizes the total Tchebychev distance between a new facility and the existing facilities. A numerical example is solved to show the validity of the developed model. Becau...

Radio network planning for UMTS technology is a relevant task for operators in the current roll-out phase. We recall a mathematical mixed-integer programming model for planning cost-efficient radio networks under network quality constraints. Based on this model, we present network planning methods. Computational results are given for two large-scale, realistic scenarios, and we compare the mixe...