Results 31 to 40 of about 465 (77)
Influence of Embankments with Parapets on the Cross-Wind Turbulence Intensity at the Contact Wire of Railway Overheads [PDF]
, 2010 Winds as an environmental factor can cause significant difficulties for the railway system operation. The railway overhead has been particularly vulnerable to cross-winds related problems, such as development of undamped oscillations due to galloping ...
Avila Sanchez, Sergio +2 more
core +2 more sources
Nonnegative definite hermitian matrices with increasing principal minors
, 2013 A nonzero nonnegative definite hermitian m by m matrix A has increasing principal minors if the value of each principle minor of A is not less than the value each of its subminors. For $m>1$ we show $A$ has increasing principal minors if and only if $A^{-
Friedland, Shmuel
core +1 more source
On Solving Travelling Salesman Problem with Vertex Requisitions
, 2017 We consider the Travelling Salesman Problem with Vertex Requisitions, where for each position of the tour at most two possible vertices are given. It is known that the problem is strongly NP-hard.
Eremeev, Anton, Kovalenko, Yulia
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EURO Journal on Computational Optimization, 2017 The generalized directed rural postman problem is an arc routing problem with many interesting real-life applications, such as routing for meter reading. In this application, a vehicle with a receiver travels through a series of neighborhoods.
Thais Ávila +3 more
doaj +1 more source
On stability of an optimal situation in a finite cooperative game with a parametric concept of equilibrium (from lexicographic optimality to Nash equilibrium) [PDF]
Computer Science Journal of Moldova, 2005 A parametric concept of equilibrium (principle of optimality) in a finite cooperative game in normal form of several players is introduced. This concept is defined by means of the partition of players into coalitions.
Sergey E. Bukhtoyarov +1 more
doaj
The Langevin Approach: a simple stochastic method for complex phenomena
, 2015 We describe a simple stochastic method, so-called Langevin approach, which enables one to extract evolution equations of stochastic variables from a set of measurements.
Fuchs, André +5 more
core +1 more source
Smallest Compact Formulation for the Permutahedron [PDF]
, 2013 In this note, we consider the permutahedron, the convex hull of all permutations of {1,2…,n} . We show how to obtain an extended formulation for this polytope from any sorting network.
Goemans, Michel X.
core +1 more source
Hair fragility (trichorrhexis nodosa) in alopecic Pomeranian dogs
Veterinary Dermatology, Volume 36, Issue 1, Page 64-73, February 2025.Background – Alopecia associated with hair cycle arrest (HCA, Alopecia X) is well‐recognised in Pomeranian dogs. The authors are unaware of reports of hair fragility in affected dogs. Hypothesis/Objectives – Following the observation of frequent hair shaft abnormalities in alopecic Pomeranians, we hypothesised that hair fragility events would be more ...
Erin Brennan +6 more
wiley +1 more source
On the Caratheodory rank of polymatroid bases [PDF]
, 2010 In this paper we prove that the Carath\'eodory rank of the set of bases of a (poly)matroid is upper bounded by the cardinality of the ground set.Comment: 7 ...
Gijswijt, Dion, Regts, Guus
core
Integer Polynomial Optimization in Fixed Dimension
, 2004 We classify, according to their computational complexity, integer optimization problems whose constraints and objective functions are polynomials with integer coefficients and the number of variables is fixed.
Barvinok A. I. +9 more
core +4 more sources