نتایج جستجو برای: k ε model
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We specifically analyzed Cayley trees with degree k ∈ {2, · · · 6}. For each link (i, j), the weight of a loan lij was drawn uniformly in [1 − ε, 1 + ε]. We analyzed 4 values of ε, from 0.1 to 0.4, in addition to ε = 0. This was done for 102 networks for each degree k and perturbation ε, and the resulting number of failures was measured. Figure A shows the results for R = 1.02, r = 1.01, f = 50...
We review several aspects of K-Physics: i) Main targets of the field, ii) The theoretical framework for K-decays, iii) Standard analysis of the unitarity triangle, iv) ε/ε, v) Rare and CP violating K-decays, vi) Comparision of the potentials of K → πνν̄ and CP-B asymmetries. vii) Some aspects of the physics beyond the Standard Model. Theoretical Summary Talk given at the ”Workshop on K-Physics”,...
Explicit constructions of binary linear codes that are efficiently list-decodable up to a fraction (1/2−ε) of errors are given. The codes encode k bits into n = poly(k/ε) bits and are constructible and list-decodable in time polynomial in k and 1/ε (in particular, in our results ε need not be constant and can even be polynomially small in n). These results give the best known polynomial depende...
We report on a calculation of εK/εK at next-to-leading in the 1/Nc expansion and to lowest order in Chiral Perturbation Theory. We discuss the short-distance matching, the scale and scheme dependence as well as the long-distance short-distance matching. We include the two known chiral corrections to our result and discuss further order p4 corrections to it. September 2000 Work supported in part...
We investigate a reaction–diffusion process in a two-phase medium with microscopic length scale ε. The diffusion coefficients in the two phases are highly different (d1/D = ε2) and the reaction constant k is large. First, the homogenisation limit ε → 0 is taken, which leads to a two-scale model. Afterwards, we pass to the fast-reaction limit k →∞ and obtain a two-scale reaction-diffusion system...
REPORTS ON SYSTEMS AND COMMUNICATIONS Unbounded Contention Resolution: k-Selection in Radio Networks
Using k-Selection in Radio Networks as an example of unique-resource dispute among k unknown contenders, the conflict-resolution protocol presented in this paper shows that, for any sensible probability of error ε, all of them get access to such resource in asymptotically optimal time (e+1+ ξ)k+O(log(1/ε)), where ξ > 0 is any constant arbitrarily close to 0. This protocol works under a model wh...
We present single-particle and thermodynamic properties of the half-filled single-band Hubbard model in 2D calculated in the self-consistent fluctuation exchange approximation. The low-energy excitations at moderate temperatures and small U are quasiparticles with a short lifetime. As the temperature is lowered, coupling to evolving spin fluctuations leads to the extinction of these quasipartic...
The lowest eigenmode of thin axisymmetric shells is investigated for two physical models (acoustics and elasticity) as the shell thickness (2ε) tends to zero. Using a novel asymptotic expansion we determine the behavior of the eigenvalue λ(ε) and the eigenvector angular frequency k(ε) for shells with Dirichlet boundary conditions along the lateral boundary, and natural boundary conditions on th...
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