Determining the optimum location of facilities is critical in many fields, particularly healthcare. This study proposes application a suitable model for field hospitals during novel coronavirus 2019 (COVID-19) pandemic. The used most appropriate among three common models utilized to solve healthcare problems (the set covering model, maximal and P-median model). proposed nonlinear binary constra...

This chapter describes a hybrid artificial life optimization algorithm (ALRT) based on emergent colonization to compute the solutions of global function optimization problem. In the ALRT, the emergent colony is a fundamental mechanism to search the optimum solution and can be accomplished through the metabolism, movement and reproduction among artificial organisms which appear at the optimum lo...

This study focused on station and dockless systems related to personal mobility sharing services in the midst of which is currently increasing. Based relevant literatures that operating these two tandem was more efficient for urban management, a methodological framework proposed with combination determining service areas based user preference locations potential demand. applied Geumjeong-gu, Bu...

It is critical to locate facilities in the retail operations, especially in competitive environment. In most competitive location models available in the literatures, demand is assumed to be fixed or random regardless of market conditions. However, demand is related to the number of facilities, service capacity or the distance from the facility to the customer, which is considered in few litera...

Background: The aging process contributes to the decline in physical capacity that leads loss of independence performing life activities. Immobility and instability are most significant predictors indicators disability dependence. As a result, variety assistive devices exist address immobility older adults, including walkers, canes, crutches, wheelchairs handrails. Sit-to-stand (STS) transition...

Recall that in the uncapacitated facility location problem we are given a set F of facilities and a set C of clients. There is a specified cost of opening a facility and specified distance between every pair i, j ∈ F ∪C. We assume that the distances satisfy the triangle inequality. The goal is to identify a set of facilities in F to serve all the clients in C such that the total facility and co...

Metric facility location and K-means are well-known problems of combinatorial optimization. Both admit a fairly simple heuristic called single-swap, which adds, drops or swaps open facilities until it reaches a local optimum. For both problems, it is known that this algorithm produces a solution that is at most a constant factor worse than the respective global optimum. In this paper, we show t...

Solutions to combinatorial optimization problems frequently rely on heuristics to minimize an objective function. The optimum is sought iteratively and pre-setting the number of iterations dominates in operations research applications, which implies that the quality of the solution cannot be ascertained. Deterministic bounds offer a mean of ascertaining the quality, but such bounds are availabl...

behaviour of the dilution characteristics of the coastal waters off tuticorin is presented in thebackground of setting up of a desalination plant. simulations of dispersion and spreading of the proposeddischarges has been carried out. scenarios of dilutions were assessed based on the results of a 2d model using the advection-dispersion theory. it is observed that under prevailing currents in th...

Summary In this study, the seismic performance of hexagrid structures which are composed of horizontal and vertical hexagrid by using a transitional story, has been investigated. To this end, 10 models of 50-story hexagrid structures were designed. 9 models with horizontal hexagrid cells which transited to vertical cells using a transitional story, and a model of completely horizontal hexagrid ...