optimal allocation of water resources is an essential service in agriculture that must be considered by farmers. one of the most significant factors in optimal allocation of water resources in agriculture is to define optimal farm cropping pattern. in this study, in order to determine optimal cropping pattern and water resources allocation in central district of mashhad city (toos village), the...

data envelopment analysis (dea) is a technique used to evaluate the relative efficiency of comparable decision making units (dmus) with multiple input-output. it computes a scalar measure of efficiency and discriminates between efficient and inefficient dmus. it can also provide reference units for inefficient dmus without consideration of the decision makers’ (dms) preferences. in this paper, ...

The Linear Fractional Programming (LFP) problem that optimizes the ratio of two linear objective functions under constraints has a wide range application areas. Based on traditional definition continuity, we developed an exact iterative algorithm does not depend big-M coefficients. Removing nonlinearity in fractional function by converting into form, equivalent linear-iterative is obtained and ...

We use potentials for calculate a reduced costs in the increment of the objective function for the linear-fractional non-homogeneous flow programming optimization problem with additional constraints of general kind. The effective algorithm for solution of the system of potentials for a sparse matrix is considered. AMS Subject Classification: 65K05, 90C08, 90C35, 05C50, 15A03, 15A06

Here, we consider single vendor-buyer model with multi-product and multi-customer and multi-facility location-production-distribution problem. It is assumed that the players of the supply chain are coordinated by sharing information. Vendor manufactures produce different products at different plants with limited capacities and then distribute the products to the consumers according to determini...

The proper ratio decision of sintering burden is a significant section for both of decreasing sintering costs and increasing quality of iron. At present most company in China take the Fixed-ratio method and linear programming (LP) model to calculate the proper ratio for sintering. The former is the performance appraisal method for production cost management of iron. The latter is to use maths m...

In this paper a multilevel programming problem, that is, three level programming problem is considered. It involves three optimization problems where the constraint region of the first level problem is implicitly determined by two other optimization problems. The objective function of the first level is indefinite quadratic, the second one is linear and the third one is linear fractional. The f...