1,619 research outputs found
Minus total domination in graphs
summary:A three-valued function defined on the vertices of a graph is a minus total dominating function (MTDF) if the sum of its function values over any open neighborhood is at least one. That is, for every , , where consists of every vertex adjacent to . The weight of an MTDF is , over all vertices . The minus total domination number of a graph , denoted , equals the minimum weight of an MTDF of . In this paper, we discuss some properties of minus total domination on a graph and obtain a few lower bounds for
Feasibility and principle analyses of morphing airfoil used to control flight attitude
Morphing airfoil technology can enable an aircraft to adapt its shape to enhance mission performance and replace the traditional flap, ailerons, elevator and rudders to optimize flight attitude control efficiency. A set of optimal airfoil shapes are obtained aimed to minimize the aerodynamic drag character by optimizing morphing configurations at different under the two-dimensional steady-flow simulation. The traditional airfoil and morphing airfoil at different are compared. It is proved that morphing wing can be used instead of a traditional wing. Couples of traditional control surface and morphing airfoil are chosen to simulate and analyze the aerodynamic difference. The flow mechanism is described on the basis of aerodynamic simulations performed by CFX. It is demonstrated why the morphing wing can provide the same with a small
Transverse momentum resummation for color sextet and antitriplet scalar production at the LHC
We study the factorization and resummation of the transverse momentum
spectrum of the color sextet and antitriplet scalars produced at the LHC based
on soft-collinear effective theory. Compared to Z boson and Higgs production, a
soft function is required to account for the soft gluon emission from the
final-state colored scalar. The soft function is calculated at the
next-to-leading order, and the resummation is performed at the approximate
next-to-next-to-leading logarithmic accuracy. The non-perturbative effects and
PDF uncertainties are also discussed.Comment: 20 pages, 7 figure
Transverse-Momentum Resummation for Gauge Boson Pair Production at the Hadron Collider
We perform the transverse-momentum resummation for , , and
pair productions at the next-to-next-to-leading logarithmic accuracy
using soft-collinear effective theory for and
at the LHC, respectively. Especially, this is the
first calculation of transverse-momentum resummation. We also
include the non-perturbative effects and discussions on the PDF uncertainties.
Comparing with the next-to-leading logarithmic results, the
next-to-next-to-leading logarithmic resummation can reduce the dependence of
the transverse-momentum distribution on the factorization scales significantly.
Finally, we find that our numerical results are consistent with data measured
by CMS collaboration for the production, which have been only reported by
the LHC experiments for the unfolded transverse-momentum distribution of the
gauge boson pair production so far, within theoretical and experimental
uncertainties.Comment: 22 pages, 6 figures, re-versio
Threshold resummation for the production of a color sextet (antitriplet) scalar at the LHC
We investigate threshold resummation effects in the production of a color
sextet (antitriplet) scalar at next-to-next-to-leading logarithmic (NNLL) order
at the LHC in the frame of soft-collinear effective theory. We show the total
cross section and the rapidity distribution with NLO+NNLL accuracy, and we
compare them with the NLO results. Besides, we use recent dijet data at the LHC
to give the constraints on the couplings between the colored scalars and
quarks.Comment: 21 pages,9 figures,3 tables; Version published in EPJ
A Novel Rough Set Model in Generalized Single Valued Neutrosophic Approximation Spaces and Its Application
In this paper, we extend the rough set model on two different universes in intuitionistic fuzzy approximation spaces to a single-valued neutrosophic environment
Optimal synthesis of general multi-qutrit quantum computation
Quantum circuits of a general quantum gate acting on multiple -level
quantum systems play a prominent role in multi-valued quantum computation. We
first propose a new recursive Cartan decomposition of semi-simple unitary Lie
group (arbitrary -qutrit gate). Note that the decomposition
completely decomposes an n-qutrit gate into local and non-local operations. We
design an explicit quantum circuit for implementing arbitrary two-qutrit gates,
and the cost of our construction is 21 generalized controlled X (GCX) and
controlled increment (CINC) gates less than the earlier best result of 26 GGXs.
Moreover, we extend the program to the -qutrit system, and the quantum
circuit of generic -qutrit gates contained
GGXs and CINCs is presented. Such asymptotically optimal structure is the best
known result so far.Comment: 16 pages, 14 figure
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