Fixed charge solid transportation problems are formulated as profit maximization problems under a budget constraint at each destination. Here item is purchased in different depots at different prices. Accordingly the item is transported to different destinations from different depots using different vehicles. Unitsare sold from different destinations to the customers at different selling prices...

Based on credibility theory and two-stage fuzzy optimization method, this paper presents a type of multi-product multi-period (MPMP) production planning model. Since the proposed production planning problem includes fuzzy variable coefficients with an infinite support, it is infinite-dimensional optimization problem. The approximation of the production planning problem is discussed, and the con...

It has been shown in various recent research reports that the analysis of short step primal dual path following algorithms for linear programming can be nicely generalized to semide nite programming How ever the analysis of long step path following algorithms for semide nite programming appeared to be less straightforward For such an algorithm Monteiro obtained an O n log iteration bound for ob...

In this paper, a maximum likelihood estimation and a minimum entropy estimation for the expected value and variance of normal fuzzy variable are discussed within the framework of credibility theory. As an application, a credibilistic portfolio selection model is proposed, which is an improvement over the traditional models as it only needs the predicted values on the security returns instead of...

The research and development of approaches to help students overcome the difficulties of acquiring good programming skills is a concern common to many institutions and researchers worldwide. One such approach is the use of virtual learning environments that allow students to freely explore several contextualized learning activities provided to them. We propose the use of scriptable 3D collabora...

Time-dependent hydration process of Portland cement presents a complex system with several uncertainties. A presented four-parametric affinity hydration model captures well the hydration kinetics when three parameters are treated as fuzzy numbers. The equations for the fuzzy affinity hydration model are derived using Zadeh’s extension principle, which allows for simplifying calculations to obta...

Given that ―rule-based analysis is the dominant form of reasoning‖ used by lawyers, it is probably safe to say that most lawyers would agree with Aristotle‘s sentiment. After all, this is how lawyers are taught to think in law school. Three years of their lives are slavishly devoted to the pursuit of logic with little to no emphasis on other forms of reasoning. Therefore, it is not surprising t...

Using alternative fuel vehicles is one of the ways to reduce the consumption of fossil fuels which have many negative environmental effects. An alternative fuel vehicle needs special planning for its refueling operations because of some reasons, e.g. limited number of refueling stations, uncertain refueling queue times in the stations, variable alternative fuel prices among the stations, etc. I...

The selection of a pharmaceutical e-commerce platform is typical multi-attribute group decision-making (MAGDM) problem. MAGDM common problem in the field decision-making, which full uncertainty and fuzziness. A probabilistic hesitant fuzzy method based on generalized TODIM proposed for under an uncertain environment. Firstly, credibility element defined, credibility-based adjusting weights deci...