Results 21 to 30 of about 773,474 (304)

Determinants of retirement of formal and informal sector workers in Mexico: the role of health and economic security

open access: yesSalud Pública de México, 2023
Objective. We examine the socioeconomic and health drivers of retirement decisions and compare these determinants between formal and informal sector workers in Mexico. Materials and methods.
Zeewan Lee, Emma Aguila, Rebeca Wong
doaj   +1 more source

Quantity decisions of two-stage competitive location model based on different location modes

open access: yesComplex & Intelligent Systems, 2021
The facility location of a competing firm in a market has great importance in supply chain management. The two-stage competitive location model formulates the decision process of an entrant firm facing both location and price competition.
Yadong Li, Xuemei Li
doaj   +1 more source

A branch-and-price algorithm for a team orienteering problem with fixed-wing drones

open access: yesEURO Journal on Transportation and Logistics, 2022
This paper formulates a team orienteering problem with multiple fixed-wing drones and develops a branch-and-price algorithm to solve the problem to optimality.
Kaarthik Sundar   +2 more
doaj   +1 more source

Column Generation Algorithm: A revision from its application to the Student Assignation Problem

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2013
The Column Generation Algorithm (CGA) is commonly cited in the bibliography as alternative to solve large scale optimization problems. This article deals with the description of the GC algorithm in the context of the student assignation to the public ...
Pablo Andrés Maya
doaj   +1 more source

Branch and Price Algorithm for Multi-Trip Vehicle Routing with a Variable Number of Wagons and Time Windows

open access: yesAlgorithms, 2022
Motivated by the transportation needs of modern-day retailers, we consider a variant of the vehicle routing problem with time windows in which each truck has a variable capacity. In our model, each vehicle can bring one or more wagons.
Leila Karimi, Chowdhury Nawrin Ferdous
doaj   +1 more source

The Generalized Bin Packing Problem [PDF]

open access: yes, 2012
In the Generalized Bin Packing Problem a set of items characterized by volume and profit and a set of bins of different types characterized by volume and cost are given.
Baldi M.M   +3 more
core   +1 more source

Branch-and-Cut-and-Price for Multi-Agent Pathfinding [PDF]

open access: yesProceedings of the Twenty-Eighth International Joint Conference on Artificial Intelligence, 2019
There are currently two broad strategies for optimal Multi-agent Pathfinding (MAPF): (1) search-based methods, which model and solve MAPF directly, and (2) compilation-based solvers, which reduce MAPF to instances of well-known combinatorial problems, and thus, can benefit from advances in solver techniques.
Edward Lam   +3 more
openaire   +2 more sources

Pickup and delivery problem with hard time windows considering stochastic and time-dependent travel times

open access: yesEURO Journal on Transportation and Logistics, 2023
Due to the uncertain nature of the traffic system, it is not trivial for delivery companies to reliably satisfy customers’ time windows. To guarantee the reliability of the pickup and delivery service under stochastic and time-dependent travel times, we ...
Zheyu Wang   +3 more
doaj   +1 more source

Between Treewidth and Clique-width [PDF]

open access: yes, 2014
Many hard graph problems can be solved efficiently when restricted to graphs of bounded treewidth, and more generally to graphs of bounded clique-width.
B Courcelle   +12 more
core   +1 more source

PENGARUH HARGA, WORD OF MOUTH DAN CITRA MEREK TERHADAP KEPUTUSAN PEMBELIAN DALAM MEMILIH EVENT ORGANIZER (STUDI KASUS DI UN PRODUCTION)

open access: yesJournal of Management and Business Review, 2019
Penelitian ini bertujuan untuk mengetahui (1) Bagaimana pengaruh harga, word of mouth dan citra merek secara simultan terhadap keputusan pembelian pada Event Organizer pada UN Production, dan Bagaimana pengaruh harga, word of mouth dan citra merek secara
Nourma Wulanda   +2 more
doaj   +1 more source

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