排序方式: 共有9条查询结果,搜索用时 15 毫秒
1
1.
O. B. Bel’skaya O. V. Maevskaya A. B. Arbuzov T. V. Kireeva V. K. Duplyakin V. A. Likholobov 《Kinetics and Catalysis》2010,51(1):98-104
The interaction of platinum(IV) and palladium(II) chloro complexes with the γ-Al2O3 surface in a wide range of surface metal concentrations is reported. Varying the concentration of the adsorbed metal complex
on the alumina surface causes changes both in the proportions of weakly and strongly bound desorbable platinum species and
in the proportions of desorbable (ion-exchanged) and nondesorbable (coordinatively bound) complexes. The adsorbed palladium
complexes are more uniform in chemical composition and binding strength and consist largely of desorbable species removable
from the surface by competitive sorption of anions. The absolute amount of coordinatively bound platinum and palladium species
increases as the total metal content of the sample is raised to 1.0% and remains almost invariable at higher metal contents. 相似文献
2.
The geometrical optics approximation is shown for the first time to be sufficient for determining the lens transparency in the Z-scan method for nonabsorbing media. The diffraction effects are taken into account in calculating the cross section of a focused Gaussian beam. With the use of the matrix method, the lens transparency of a Z-scan scheme is determined as a quantity inverse to the square of its normalized optical power. At a small phase incursion, the expressions for the lens transparency obtained by different methods coincide. 相似文献
3.
4.
5.
E. P. Akishina T. P. Akishina V. V. Ivanov A. I. Maevskaya O. Yu. Denisova 《Physics of Particles and Nuclei Letters》2008,5(2):116-126
The problem of electron/pion identification in the CBM experiment based on the measurements of energy losses and transition
radiation in the TRD detector is discussed. Earlier we analyzed a possibility to solve such a problem using an artificial
neural network (ANN) [1]. Here we consider an approach based on a nonparametric ω
n
k
goodness-of-fit criterion, and comparison with the ANN method is also performed. We show that both methods provide a comparable
level of pion suppression and electron identification, the ω
n
k
test is more simple for practical applications, the ANN method provides the needed level of pions suppression only if “clever”
variables are used. We demonstrate that application of the ω
n
k
-criterion to the J/Ψ reconstruction provides a high level of pion background suppression and significantly improves a signal-to-background ratio.
The text was submitted by the authors in English. 相似文献
6.
Physics of Atomic Nuclei - During the upcoming Run 3 and Run 4 at the LHC the upgraded ALICE (A Large Ion Collider Experiment) will operate at a significantly higher luminosity and will collect two... 相似文献
7.
8.
9.
1