The improved QCD light-cone sum rule (LCSR) provides an effective way to dealwith the heavy-to-light transition form factors (TFFs). Firstly, we adopt thei... HB Fu,XG Wu,HY Han,... - 《Nuclear Physics B》 被引量: 18发表: 2013年 ...
As a rough general rule, at low frequencies, every material is perfectly reflecting (|ζ|→∞) while, at high frequencies, every material is perfectly absorbing (ζ˙→ 1, ζ^→ 0). The surface of a porous material can be accurately characterized by such a local boundary condition. Delany...
Two-dimensional (2D) materials enable the fabrication of single-crystal, suspended mechanical structures as thin as a single monolayer and represent a promising platform for confining EHF longitudinal acoustic (LA) phonons where free surfaces are utilized as acoustic mirrors. The ultrafast mechanical res...
In the conventional method, we naively use the conventional BEM evaluating T(ω) at the integral points ωs required by the quadrature rule with a sufficiently large number of ωs. The method to follow is also used to evaluate the pole of T(ω), needed for the interval subdivision ...
the difference between the gap Chern numbers of two phases, where the gap Chern number is defined as the sum of the Chern numbers of all the bands below the band gap, which is equal to plus (minus) one for the triangular (honeycomb) phononic crystal, and zero for the rigid wall here....
while the field intensity approaches zero. The same rule also imposes a restriction on super-oscillation, for which the amplitude is small. Thus, the radiation force was intuitively thought to be trivial. Here, we show that the rapidly changed pressure field in super-oscillation packets will gene...
In order to rule out the primary reason, the influence of user-defined settings on the AE monitoring has to be minimized. This research presents a new AE feature that is independent of threshold and timing settings. The proposed feature is derived from the idea that each waveform will have ...