نتایج جستجو برای: design acceleration spectrum

تعداد نتایج: 1211002  

Journal: :CoRR 2015
Alexandros E. Paschos Vasileios M. Kapinas Leontios J. Hadjileontiadis George K. Karagiannidis

A novel optimization algorithm, called accelerated particle swarm optimization (APSO), is proposed to be used for dynamic spectrum sensing in cognitive radio networks. While modified swarm-based optimization algorithms focus on slight variations of the standard mathematical formulas, in APSO, the acceleration variable of the particles is also considered in the search space. We show that the pro...

2005
Dmitri Kharzeev D. Kharzeev

Inelastic hadron interactions at high energies are accompanied by a pulse of a strong chromo–electric field. This field leads to the decay of QCD vacuum which proceeds through the emission of partons with a thermal spectrum. In a semi–classical treatment, the effective temperature of the spectrum is determined by the acceleration of partons in the classical chromo–electric field, in accord with...

Journal: :Magnetic resonance in medicine 2011
Marion I Menzel Ek T Tan Kedar Khare Jonathan I Sperl Kevin F King Xiaodong Tao Christopher J Hardy Luca Marinelli

We developed a novel method to accelerate diffusion spectrum imaging using compressed sensing. The method can be applied to either reduce acquisition time of diffusion spectrum imaging acquisition without losing critical information or to improve the resolution in diffusion space without increasing scan time. Unlike parallel imaging, compressed sensing can be applied to reconstruct a sub-Nyquis...

2004
S. Lieb H. Lesch G. T. Birk

For the nonthermal radio emission of the Galactic Center Arc in situ electron acceleration is imperative. The observed radio spectrum can be modeled by a transport equation for the relativistic electrons which includes particle acceleration by electric fields, momentum diffusion via scattering by magnetohydrodynamical turbulence and energy losses by synchrotron radiation. The accelerating elect...

2008
Donald C. Ellison Glen P. Double

We present results from a fully relativistic Monte Carlo simulation of diffusive shock acceleration (DSA) in unmodified shocks. The computer code uses a single algorithmic sequence to smoothly span the range from nonrelativistic speeds to fully relativistic shocks of arbitrary obliquity, providing a powerful consistency check. While known results are obtained for nonrelativistic and ultra-relat...

2016
P.Kiran Kumar

Experiments were conducted to obtain the modal damping ratios of two hollow cylinders of different thicknesses of Aluminum. An electro dynamic exciter with slip table is used to excite the hollow cylinders. The hollow cylinder (unit under test) is fastened to the exciter. The exciter is placed in the horizontal direction and connected to the slip table. A control accelerometer is placed at the ...

Journal: :The Astrophysical Journal 2022

Diffusive shock acceleration at collisionless shocks remains the most likely process for accelerating particles in a variety of astrophysical sources. While standard prediction strong is that spectrum accelerated universal, $f(p)\propto p^{-4}$, numerous phenomena affect this simple conclusion. In general, non-linear dynamical reaction leads to concave spectrum, steeper than $p^{-4}$ momenta be...

2002
Sang-Ho Hyon Tsutomu Mita

A b s t r a c t m As many biomechanists indicate~ tendon plays important role for running or jumping motion. It stores the kinetic energy as a potential energy during stance and also absorbs the impulse at touch down. Inspired by such biomechanical studies~ we propose a new simple mechanical model for hindlimb of a dog to realize a robot that imitates dog running~ and the hardware design of one...

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