In order to keep a green planet, in particular its important to limiting the pollution with gas emissions. In a specific capacitated fixed-charge transportation problem with fixed capacities for distribution centers and customers with particular demands, the objective is to keep the pollution factor in a given range while the total cost of the transportation is as low as possible. In order to s...

A new method using the principle of zero point method [10] is proposed for finding an optimal solution of solid transportation problems. The proposed method yields an optimal solution of the given solid transportation problem directly . It is very easy to understand and apply which can serve managers by providing the optimal solution to a variety of distribution problems involving three items. ...

This paper is about improving the performance of genetic algorithm (GA) to solve fixed-charge transportation problem (FCTP). Several approaches have been developed, based on adaptation and improvement operators. We propose a new adopting an immigration strategy maintain diversity in population then overcome stagnation values objective function. Thereby, we applied two types immigration, random ...

We study a multiechelon supply chain model that consists of a production level and several transportation levels, where the demands can exist in the production echelon as well as any transportation echelons. With the presence of stationary production capacity and general cost functions, our model integrates production, inventory and transportation decisions and generalizes existing literature o...

background: this study assessed the clinical usefulness of the solid phantom, which may compensate for the disadvantages of the water phantom, by comparing the radiological doses between the two depending on their depths. materials and methods: the experimental equipment used was a linear accelerator for medical use, water phantom, solid phantom, farmer type ion chamber and electrometer. the di...