Results 131 to 140 of about 644,844 (268)

Branch‐and‐Cut POPMUSIC for the Electric Vehicle Routing Problem With Time Windows

open access: yesNetworks, EarlyView.
ABSTRACT Advancements in computer hardware and commercial software have enabled the use of branch‐and‐cut (BC) methodologies to address medium‐scale vehicle routing problems (VRPs). Despite the introduction of efficient heuristics in the literature, tailoring these approaches to suit various VRP variants, such as the electric vehicle routing problem ...
Lelisa Kebena Bijiga   +2 more
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

Stabilising Routines in Complex Emergencies: How Basic Service Continuity Shapes Perceived Security

open access: yesPublic Administration and Development, EarlyView.
ABSTRACT This study examines how locally embedded actors describe the relationship between basic service continuity and perceived security in complex emergencies, with particular attention to the stabilisation of everyday routines. Using Proximity‐Predictability‐Attributability (PPA) as an analytic lens, we trace how interviewees relate access to water,
Abdullah Gökhan Yaşa, Orçun İmga
wiley   +1 more source

Forest governance and the politics of care: Practices, subjectivities and more‐than‐human‐relations in contemporary conservation regimes in Guaviare, Colombia

open access: yesPeople and Nature, EarlyView.
Abstract Market‐based conservation instruments such as REDD+ and Payments for Ecosystem Services (PES) have been promoted to curb deforestation in the Colombian Amazon. Yet these schemes remain contested, as they advance neoliberal conservation and reproduce gender inequalities.
Sandra Ángel Moreno   +2 more
wiley   +1 more source

Characterization of intermediate values of the triangle inequality II

open access: yesOpen Mathematics, 2014
Sano Hiroki   +4 more
doaj   +1 more source

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