Results 181 to 190 of about 440,455 (286)

A Two‐Stage Optimization Approach for Selecting Electric‐Flight Airports

open access: yesNetworks, EarlyView.
ABSTRACT The decarbonization of short‐haul air transport has gained increasing attention, with electric aircraft emerging as a promising alternative to conventional short‐haul aviation. However, given the substantial investment anticipated for the necessary infrastructure, a strategic and globally coordinated selection of airports is imperative.
Imke Joormann   +2 more
wiley   +1 more source

A Supervised Learning Framework for Accelerating Solvers and Metaheuristics in Routing Problems

open access: yesNetworks, EarlyView.
ABSTRACT Routing problems such as the traveling salesman problem (TSP) and the capacitated vehicle routing problem (CVRP) are computationally challenging due to the exponential growth of their feasible solution spaces with increasing instance size.
Johannes Gückel   +2 more
wiley   +1 more source

Exact Solution of Picker Routing Problems in Zoned Warehouses With Scattered Storage

open access: yesNetworks, EarlyView.
ABSTRACT We present two picker routing problems in a warehouse split into multiple disjoint zones with a picker assigned to each zone. Scattered storage is applied, meaning an article can be stored at several pick positions in one or more zones, and capacity restrictions limit the number of collected articles for each picker.
Laura Lüke
wiley   +1 more source

An Exact Algorithm for the Traveling Salesman Problem With Pickup and Delivery Under Time Windows and Ride‐Time Constraints

open access: yesNetworks, EarlyView.
ABSTRACT The Traveling Salesman problem with pickup, delivery, and ride‐time constraints (TSPPD‐RT) requires a depot‐based vehicle to visit multiple known requests. Each request specifies a pickup vertex, corresponding delivery vertex, and maximum travel time between them (ride‐time). The goal is to find a tour that (i) starts and finishes at the depot,
Xinbo Zhang, Roberto Baldacci
wiley   +1 more source

Redefining Acne as a Distinct Inflammatory Disease: Acne Is Not an Aesthetic Issue

open access: yes
JEADV Clinical Practice, EarlyView.
Jean Paul Claudel   +4 more
wiley   +1 more source

Co‐Production as State‐Building: Relational Capacity and the Prevention of Violent Extremism in the Global South

open access: yesPublic Administration and Development, EarlyView.
ABSTRACT This article advances a theory of co‐production as a relational state‐building strategy for countering youth radicalisation in fragile states. Grounded in fieldwork in northern Togo, affected by jihadist incursions from the Sahel and home to a predominantly young population, we argue that co‐production extends state presence into ‘brown areas’
Bakoa Nathan Madjoulba   +1 more
wiley   +1 more source

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