Results 51 to 60 of about 863,374 (379)
Convexity in partial cubes: the hull number [PDF]
, 2014 We prove that the combinatorial optimization problem of determining the hull number of a partial cube is NP-complete. This makes partial cubes the minimal graph class for which NP-completeness of this problem is known and improves some earlier results in
A. Björner +28 more
core +6 more sources
Effect of Sowing Dates on Fatty Acids and Phytosterols Patterns of Carthamus tinctorius L.
Applied Sciences, 2019 Field experiments were carried out at the Regional Centre of Experimentation in Organic agriculture at Auch (near Toulouse, South west of France).
Jane Roche +3 more
doaj +1 more source
Polyhydroxybutyrate Rice Hull and Torrefied Rice Hull Biocomposites
Polymers, 2022 Raw and torrefied rice hulls (RRH and TRH) were incorporated into polyhydroxybutyrate (PHB) as fillers using extrusion and injection molding to produce biomass-polymer composites. Filler and composite materials were characterized by particle size analysis, thermomechanical analysis, thermogravimetric analysis, differential scanning calorimetry, FTIR ...
Zach McCaffrey +6 more
openaire +2 more sources
Facets of a mixed-integer bilinear covering set with bounds on variables
, 2019 We derive a closed form description of the convex hull of mixed-integer bilinear covering set with bounds on the integer variables. This convex hull description is determined by considering some orthogonal disjunctive sets defined in a certain way.
Mahajan, Ashutosh, Rahman, Hamidur
core +1 more source
ERJ Open Research, 2021 Background Continuous positive airway pressure (CPAP) and high-flow nasal oxygen (HFNO) have been used to manage hypoxaemic respiratory failure secondary to coronavirus disease 2019 (COVID-19) pneumonia.
Dominic L. Sykes +7 more
doaj +1 more source
BernoulliWe introduce a hull operator on Poisson point processes, the easiest example being the convex hull of the support of a point process in Euclidean space. Assuming that the intensity measure of the process is known on the set generated by the hull operator, we discuss estimation of an expected linear statistic built on the Poisson process.
Last, Günter, Molchanov, Ilya
openaire +3 more sources
The effect of lift on the wave-making resistance of multi-hull craft [PDF]
, 2007 A potential based panel method is presented to estimate the wave-making characteristics of multi-hull craft. In order to simulate the lifting potential flow around the sub-hulls, the method adopts mixed source/doublet distributions on the sub-hulls and ...
Sayer, P.G., Vassalos, D., Xie, N.
core +1 more source
Computing metric hulls in graphs
, 2018 We prove that, given a closure function the smallest preimage of a closed set can be calculated in polynomial time in the number of closed sets. This confirms a conjecture of Albenque and Knauer and implies that there is a polynomial time algorithm to ...
Knauer, Kolja, Nisse, Nicolas
core +2 more sources
Transition from connected to fragmented vegetation across an environmental gradient: scaling laws in ecotone geometry [PDF]
, 2009 A change in the environmental conditions across space—for example, altitude or latitude—can cause significant changes in the density of a vegetation type and, consequently, in spatial connectivity.
Gastner, Michael T. +3 more
core +1 more source
Advanced Engineering Materials, EarlyView.The release of foulers from protective marine coatings is determined by several interrelated material properties, including the strength of Young's modulus, the flexibility of chain segments, the surface free energy, and the magnitude of hydrodynamic stress.
Johann C. Schaal +2 more
wiley +1 more source