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17 papers · 1 filter
Extraordinary acoustic reflection enhancement by acoustically-transparent thin plates
Zhaojian He, Shasha Peng, Chunyin Qiu +6
We report an observation of the extraordinary high reflection of acoustic waves in water by thin epoxy plates partitioned by subwavelength cuts, whereas such plates without structu…
Acoustic transmission enhancement through a periodically-structured stiff plate without any opening
Zhaojian He, Han Jia, Chunyin Qiu +6
We report both experimentally and theoretically that the enhanced acoustic transmission can occur in the subwavelength region through a thin but stiff structured-plate without any…
Measurement of the asymmetry parameter for the decay
BES collaboration
Based on a sample of decays collected with the BESII detector at the BEPC, the decay parameter for is measured using abo…
Analytic smoothness effect of solutions for spatially homogeneous Landau equation
Hua Chen, Wei-Xi Li, Chao-Jiang Xu
In this paper, we study the smoothness effect of Cauchy problem for the spatially homogeneous Landau equation in the hard potential case and the Maxwellian molecules case. We obtai…
Global Hypoellipticity and Compactness of Resolvent for Fokker-Planck Operator
Wei-Xi Li
In this paper we study the Fokker-Planck operator with potential V(x), and analyze some kind of conditions imposed on the potential to ensure the validity of global hypoelliptic es…
Calculations of polarizabilities and hyperpolarizabilities for the Be ion
Li-Yan Tang, Jun-Yi Zhang, Zong-Chao Yan +3
The polarizabilities and hyperpolarizabilities of the Be ion in the state and the state are determined. Calculations are performed using two independent methods:…