نتایج جستجو برای: b δ
تعداد نتایج: 924034 فیلتر نتایج به سال:
We present a compared experimental investigation of the (a, b) plane vortex-state complex resistivity at 48 GHz in YBa2Cu3O7−δ, SmBa2Cu3O7−δ and Bi2Sr2CaCu2O8+x. In YBa2Cu3O7−δ and SmBa2Cu3O7−δ the field dependence of the response can be consistently described by a combination of flux flow and strong pair breaking due to the presence of lines of nodes in the gap. In Bi2Sr2CaCu2O8+x, by contrast...
Morphisms of some categories of sets with similarity relations (Ω-sets) are investigated, where Ω is a complete residuated lattice. Namely a category SetF(Ω) with morphisms (A, δ) → (B, γ) defined as special maps A → B and a category SetR(Ω) with morphisms defined as a special relations A × B → Ω. It is proved that arbitrary maps A → Ω and A × B → Ω can be extended onto morphisms (A, δ) → (Ω,↔)...
Abstract. This paper shows how the Lebesgue integral can be obtained as a Riemann sum and provides an extension of the Morse Covering Theorem to open sets. Let X be a finite dimensional normed space; let μ be a Radon measure on X and let Ω ⊆ X be a μ-measurable set. For λ ≥ 1, a μ-measurable set Sλ(a) ⊆ X is a λ-Morse set with tag a ∈ Sλ(a) if there is r > 0 such that B(a, r) ⊆ Sλ(a) ⊆ B(a, λr)...
The problem of computation of parameters of m-ary channel is considered. It is demonstrated that although the problem is ill-posed, it is possible “turning” of the parameters of the system and transform the problem to well-posed one. Statement of the problem. We analyze the well-known formula for probability of correct identification if orthogonal signal in m-ary channel, which has the form dz ...
Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is r...
where a and b are arbitrary real numbers satisfying a < b, x ∈ W1,1(a,b) and f belongs to a space of functions described below. By an appropriate choice of representatives, W1,1(a,b) can be identified with the set of absolutely continuous functions x : [a,b] → R1, and henceforth we will assume that this has been done. Denote by M the set of integrands f = f (t,x, p) : R3 → R1 which satisfy the ...
We have investigated numerically the quantum evolution of a δ-like wave-packet in a quenched disordered medium described by a tight-binding Hamiltonian with long-range hopping (band random matrix approach). We have obtained clean data for the scaling properties in time and in the bandwidth b of the packet width˜M and its fluctuations ∆ ˜ M with respect to disorder realizations. We confirm that ...
It is proved that a compactly supported (or decaying faster than any exponential) spherically symmetric potential is uniquely determined by the phase shift δ(k) known for all k ∈ (a, b), 0 ≤ a < b < ∞. Here the phase shift δ(k) corresponds to the s-wave. No information about bound states energies and normalizing constants is assumed known
Triarylsulfonium hexafluorophosphate salts were shown to be effective catalysts for the ring-opening polymerisation of various cyclic monomers under UV irradiation. A dual basic/acidic catalytic system demonstrated the potential for UV-triggered formation of poly(δ-valerolactone)-b-poly(L-lactide)-b-poly(δ-valerolactone) in a 'one-pot' reaction.
The supplementary materials are a full Appendix of the paper. It includes two parts: Appendix A contains an additional theorem on asymptotic expansions of λ θ (z) and λ (1) θ (z), two related corollaries, and their proofs. Appendix B contains proofs of the three theorems in the paper. In Appendix A.1, we provide an additional theorem on asymptotic expansions of the local maximum likelihood esti...
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