Results 11 to 20 of about 5,124,705 (288)
Matroid and Knapsack Center Problems [PDF]
Algorithmica, 2013 In the classic $k$-center problem, we are given a metric graph, and the objective is to open $k$ nodes as centers such that the maximum distance from any vertex to its closest center is minimized.
A. Schrijver +15 more
core +3 more sources
The stratified p-center problem [PDF]
Computers & Operations Research, 2018 This work presents an extension of the p-center problem. In this new model, called Stratified p-Center Problem (SpCP), the demand is concentrated in a set of sites and the population of these sites is divided into different strata depending on the kind ...
Albareda-Sambola, Maria +2 more
core +9 more sources
Travelling Salesman Problem with a Center [PDF]
Physical Review E, 2005 We study a travelling salesman problem where the path is optimized with a cost function that includes its length $L$ as well as a certain measure $C$ of its distance from the geometrical center of the graph.
Adam Lipowski +5 more
core +3 more sources
CENTER PROBLEM FOR A THIRD-ORDER ODES. [PDF]
Int J Bifurcat Chaos, 2013 We obtain necessary and sufficient conditions for the existence of a center on a local center manifold for three 4-parameter families of quadratic systems on ℝ3. We also give a positive answer to an open question posed in [Dias & Mello, 2010] related to similar systems.
Mahdi A.
europepmc +5 more sources
The complete vertex p-center problem [PDF]
EURO Journal on Computational Optimization, 2020 The vertex p-center problem consists of locating p facilities among a set of M potential sites such that the maximum distance from any demand to its closest located facility is minimized.
F.Antonio Medrano
doaj +5 more sources
Structure, Thermal Properties and Proton Conductivity of the Sulfonated Polyphenylquinoxalines
Membranes, 2022 This paper briefly reviews the results of scientific research on the proton conductivity of sulfonated polyphenylquinoxalines. Synthesis, structure (IR spectroscopy, SEM, quantum-chemical modeling, molecular weight distribution), moisture capacity ...
Anna V. Pisareva +9 more
doaj +1 more source
On the State of Graphene Oxide Nanosheet in a Polyurethane Matrix
Nanomaterials, 2023 Thermally stable films were obtained from a water-based polyurethane (PU) dispersion with small (0.1–1.5 wt.%) additions of graphene oxide (GO).
Sergey A. Baskakov +7 more
doaj +1 more source
Centers of cubic differential systems with the line at infinity of maximal multiplicity
Acta et Commentationes: Ştiinţe Exacte şi ale Naturii, 2023 We classify all cubic differential systems with a center-focus critical point and the line at infinity of maximal multiplicity. It is proved that the critical point is of the center type if and only if the divergence of the vector field associated to ...
Alexandru Șubă
doaj +1 more source
Donation Center Location Problem [PDF]
Algorithmica, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Huang, Chien-Chung, Svitkina, Zoya
openaire +4 more sources
Cyclicity versus Center Problem [PDF]
Qualitative Theory of Dynamical Systems, 2010 We prove that there are one-parameter families of planar differential equations for which the center problem has a trivial solution and on the other hand the cyclicity of the weak focus is arbitrarily high. We illustrate this phenomenon in several examples for which this cyclicity is computed.
Gasull, Armengol, Giné, Jaume
openaire +3 more sources