In this paper the questions of the definition of the centers optimum allocation in fuzzy transportation networks are observed by the minimax criterion. It is supposed that the information received from GIS is presented like a fuzzy graph. In this case the task of the definition of the centers optimum allocation transforms into the task of the definition of the graph vitality fuzzy set. The meth...

Hubs are critical elements of transportation networks. Location of hubs and allocation of demands to them are of high importance in the network design. The most important purpose of these models is to minimize the cost, but path reliability is also another important factor which can influence the location of hubs. In this paper, we propose a P-center hub location model with full interconnection...

OBJECTIVES To combine microsimulation and location-allocation techniques to determine antenatal class locations which minimise the distance travelled from home by potential users. DESIGN Microsimulation modeling and location-allocation modeling. SETTING City of Leeds, UK. PARTICIPANTS Potential users of antenatal classes. METHODS An individual-level microsimulation model was built to es...

in this study, a hierarchical hub location problem by considering different modes of transportation and maximum allowed delay is investigated. this study is done on iran’s express postal service with 2 days maximum delay in delivery considering ground and airport hubs. the problem is of the type of location and single allocation for collection, transfer and distribution of the shipments. all th...

During the past twenty years, rapid strides have been made in the advancement of preventive medicine and community health work. With this development has come an increasing recognition of the value of bringing public health work close to the people. Several state and local health departments, in cooperation with medical societies and non-official health and welfare agencies, are giving serious ...

In this paper, a location allocation (LA) problem in construction and demolition (C&D) waste management (WM) is studied. A bi-level model for this problem under a fuzzy random environment is presented where the upper level is the governments who sets up the processing centers, and the lower level are the administrators of different construction projects who control C&D waste and the after treat...