16,761 research outputs found
Feel Safe to Take More Risks? Insecure Attachment Increases Consumer Risk-Taking Behavior
open access articl
Contributions of hyperon-hyperon scattering to subthreshold cascade production in heavy ion collisions
Using a gauged flavor SU(3)-invariant hadronic Lagrangian, we calculate the
cross sections for the strangeness-exchange reactions YY to N\Xi (Y=\Lambda,
\Sigma) in the Born approximation. These cross sections are then used in the
Relativistic Vlasov-Uehling-Uhlenbeck (RVUU) transport model to study \Xi
production in Ar+KCl collisions at incident energy of 1.76A GeV and impact
parameter b=3.5 fm. We find that including the contributions of hyperon-hyperon
scattering channels strongly enhances the yield of \Xi, leading to the
abundance ratio \Xi^{-}/(\Lambda+\Sigma^{0})=3.38E-3, which is essentially
consistent with the recently measured value of by the HADES collaboration at GSI.Comment: 8 pages, 5 figure
Optimizing production scheduling of steel plate hot rolling for economic load dispatch under time-of-use electricity pricing
Time-of-Use (TOU) electricity pricing provides an opportunity for industrial
users to cut electricity costs. Although many methods for Economic Load
Dispatch (ELD) under TOU pricing in continuous industrial processing have been
proposed, there are still difficulties in batch-type processing since power
load units are not directly adjustable and nonlinearly depend on production
planning and scheduling. In this paper, for hot rolling, a typical batch-type
and energy intensive process in steel industry, a production scheduling
optimization model for ELD is proposed under TOU pricing, in which the
objective is to minimize electricity costs while considering penalties caused
by jumps between adjacent slabs. A NSGA-II based multi-objective production
scheduling algorithm is developed to obtain Pareto-optimal solutions, and then
TOPSIS based multi-criteria decision-making is performed to recommend an
optimal solution to facilitate filed operation. Experimental results and
analyses show that the proposed method cuts electricity costs in production,
especially in case of allowance for penalty score increase in a certain range.
Further analyses show that the proposed method has effect on peak load
regulation of power grid.Comment: 13 pages, 6 figures, 4 table
Low-bias Negative Differential Resistance effect in armchair graphene nanoribbon junctions
Graphene nanoribbons with armchair edges (AGNRs) have bandgaps that can be
flexibly tuned via the ribbon width. A junction made of a narrower AGNR
sandwiched between two wider AGNR leads was recently reported to possess two
perfect transmission channels close to the Fermi level. Here, we report that by
using a bias voltage to drive these transmission channels into the gap of the
wider AGNR lead, we can obtain a negative differential resistance (NDR) effect.
Owing to the intrinsic properties of the AGNR junctions, the on-set bias
reaches as low as ~ 0.2 V and the valley current almost vanishes. We further
show that such NDR effect is robust against details of the atomic structure of
the junction, substrate and whether the junction is made by etching or by
hydrogenation.Comment: The following article has been submitted to Applied Physics Letters
(http://scitation.aip.org/content/aip/journal/apl). Copyright (2014)
Author(s). This article is distributed under a Creative Commons Attribution
3.0 Unported Licens
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