Results 71 to 80 of about 28,713 (220)
Exploring drivers and costs of partial trans‐Saharan migration in juvenile vultures
Ibis, EarlyView.Partial migration occurs when only a subset of individuals within a population undertakes a migratory journey. The decision to migrate can be influenced by intrinsic traits (e.g. sex or physical condition) as well as by extrinsic factors (e.g. social environment or resource availability).
Eneko Arrondo +18 more
wiley +1 more source
A combinatorial approximation algorithm for CDMA downlink rate allocation [PDF]
, 2004 This paper presents a combinatorial algorithm for downlink rate allocation in Code Division Multiple Access (CDMA) mobile networks. By discretizing the coverage area into small segments, the transmit power requirements are characterized via a matrix ...
Boucherie, R.J. +3 more
core +1 more source
International Transactions in Operational Research, EarlyView.Abstract The application of automated ground vehicles (AGVs) is well‐established in closed environments such as port terminals, while their operation in open areas remains challenging. In this work, we set out to overcome this limitation by introducing platooning as a transfer mode in heterogeneous vehicle networks.
Nadia Pourmohammad‐Zia +2 more
wiley +1 more source
Zero-one IP problems: Polyhedral descriptions & cutting plane procedures [PDF]
, 1994 A systematic way for tightening an IP formulation is by employing classes of linear inequalities that define facets of the convex hull of the feasible integer points of the respective problems.
Abdul-Hamid, F, Mitra, G, Yarrow, L
core
On equivalent knapsack problems
Discrete Applied Mathematics, 1986 By aggregating objective function and constraint of a knapsack problem max\(\{\) c'x\(|\) a'x\(\leq b\), \(x\geq 0\) integral\(\}\) an equivalent problem of the following form is obtained: Let \(t=[c_ 1b/a_ 1]+1\) and let \(F(z)=\min \{(c+ta)'x|\) c'x\(\equiv z mod t\), \(x\geq 0\), integral\(\}\).
openaire +1 more source
Journal of Fish Biology, EarlyView.Abstract Methods using environmental nucleic acids have become highly effective for monitoring aquatic biodiversity, with an array of suitable use cases, including metrics for fisheries assessment. Traditional methods for assessing fish populations often rely on invasive techniques with limited spatial and temporal coverage.
Ana Ramón‐Laca +6 more
wiley +1 more source
Robust and MaxMin Optimization under Matroid and Knapsack Uncertainty Sets [PDF]
, 2011 Consider the following problem: given a set system (U,I) and an edge-weighted graph G = (U, E) on the same universe U, find the set A in I such that the Steiner tree cost with terminals A is as large as possible: "which set in I is the most difficult to ...
Gupta, Anupam +2 more
core
Exact Solution Methods for the $k$-item Quadratic Knapsack Problem
, 2016 The purpose of this paper is to solve the 0-1 $k$-item quadratic knapsack problem $(kQKP)$, a problem of maximizing a quadratic function subject to two linear constraints. We propose an exact method based on semidefinite optimization.
A Billionnet +18 more
core +2 more sources
Medical Anthropology Quarterly, EarlyView.Abstract This article examines the embodied and institutional forms of marginalization experienced by Mexican deportees in Tijuana. Drawing on ethnographic fieldwork conducted in clinics and social service organizations, it explores how deportees are corporeally stigmatized, denied legal recognition, and pathologized as addicts in need of coercive ...
Carlos Martinez
wiley +1 more source
The quadratic knapsack problem
European Journal of Operational ResearchzbMATH Open Web Interface contents unavailable due to conflicting licenses.
Galli L., Martello S., Toth P.
openaire +3 more sources