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排序方式: 共有497条查询结果,搜索用时 359 毫秒
421.
An attempt is made to study the existence of dynamical fluctuations of relativistic particles using the methods of modified multifractal moments, Gq, and scaled factorial moments, Fq, in terms of new scaled variable X(η) suggested by Bialas and Gazdzicki. For this purpose analyses of experimental and UrQMD data involving interactions of 28Si and 12C nuclei at with nuclear emulsion are used. The variation of lnGq and lnFq with lnM in pseudorapidity (η) phase space reveals power law behaviour. The values of slopes, τq and q determined from the analyses of Gq and Fq moments are discussed. The generalized fractal dimensions, Dq, determined from the above methods are found to decrease with the order of the moments, q, indicating multifractality in multiparticle production. It is also observed that the spectral function f(αq) for heavier projectile is much broader than for lighter beam due to larger number of participating nucleons present in heavier projectile. 相似文献
422.
423.
令ζm,n表示所有的不可约m×n二部竞赛矩阵,M∈ζm,n和实数k≠0,本文主要获得了下述结论:首先研究k是M的特征值时k的几何重数,然后研究k是M的特征值的一些充要条件,最后讨论k是M的特征值时M的性质. 相似文献
424.
Sudhir Raniwala 《Pramana》2003,60(4):739-752
Measurements of azimuthal distribution of inclusive photons using the fine granularity pre-shower photon multiplicity detector
(PMD) at CERN SPS are used to obtain anisotropy in the azimuthal distributions. These results are used to estimate the anisotropy
in the neutral pion distributions. The results are compared with results of charged particle data, both for first order and
second order anisotropy. Assuming the same anisotropy for charged and neutral pions, the anisotropy in photons is estimated
and compared with the measured anisotropy. The effect of neutral pion decay on the correlation between the first order and
the second order event plane is also discussed. Data from PMD can also be used to estimate the reaction plane for studying
any anisotropy in particle emission characteristics in the ALICE experiment at the large hadron collider (LHC). In particular,
we show that using the event plane from the PMD, it will be possible to measure the anisotropy inJ/Ψ absorption (if any) in the ALICE experiment. 相似文献
425.
作者证明了如下结果 :设M是空间形式的闭定向Dupin超曲面 ,其截面曲率为正 ,M至少有两个不同主曲率 .如果除最小 (或最大 )主曲率外 ,M的其余主曲率均为常数 ,则最小 (或最大 )主曲率的重数大于 2 . 相似文献
426.
《Pramana》2003,60(5):1059-1065
We present the measurements of charged particle pseudorapidity distributions dNch/dη performed by the NA50 experiment in Pb-Pb collisions at the CERN SPS. Measurements were done at incident energies of 40
GeV (√s = 8.77 GeV) and 158 GeV (√s = 17.3 GeV) per nucleon over a broad impact parameter range. The multiplicity distributions are studied as a function of
centrality using the number of participating nucleons(N
part
), or the number of binary nucleon-nucleon collisions (Ncoll). Their values at midrapidity exhibit a linear scaling withN
part
at both energies. Particle yield increases approximately by a factor of 2 betweeny √s = 8.77 GeV and √s = 17.3 GeV. 相似文献
427.
HanZhaoxiu 《分析论及其应用》2003,19(2):145-152
By considering the properties of f(t,u,v)/u v, g(t,u,v)/u v, we show the multiplicity of at least two positive solutions of the elliptic system. 相似文献
428.
姚庆六 《应用泛函分析学报》2003,5(4):289-298
研究环域上一类非线性二阶椭圆系统的正对径解的存在性和多解性,章的主要思想是锥拉伸与锥压缩型的Krasnosel’skii不动点定理的局部应用。 相似文献
429.
Emmanuel Hebey 《偏微分方程通讯》2016,41(6):913-924
We prove the existence of multiple solutions for critical Kirchhoff equations involving positive operators in closed manifolds. 相似文献
430.
We study the bifurcation diagrams of classical positive solutions u with ‖u‖∞∈(0,∞) of the p-Laplacian Dirichlet problem