共查询到20条相似文献,搜索用时 78 毫秒
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利用单事例阶乘矩方法计算了NA27数据的事例空间矩Cp,q(M).与纯统计涨落的蒙特卡罗事例样本的计算结果比较,表明Cp,q(M)随M的变化主要由统计涨落引起的.对NA27数据的赝快度间隔作不稳定性分析,计算了类熵量Sq和Σq,两者都显著地偏离于1.Sq和Σq随q的变化呈指数关系.FRITIOF模拟能重现此标度行为,但数值偏离较大. 相似文献
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The Steady-State Spatially Resolved Reflectance of a Three-Layered Mismatched Medium 总被引:1,自引:0,他引:1
Xichang Wang Yanjun Gong DongCao Song Zhensen Wu 《International Journal of Infrared and Millimeter Waves》2005,26(3):433-442
Near-IR radiation is often utilized to detect the properties in tissues, up to now, a semi-infinite medium photon migration model and a two-layered turbid medium model are applied widely. In this paper, we set up the steady-state photon diffusion model of three-layered mismatched medium. We utilize the diffuse equation to solve a three-layered mismatched medium and obtain the accurate solution of a three-layered mismatched medium of the steady state in tissue. We find that the solution of a three-layered mismatched medium diffusion equation not only accord with the Monte-Carlo simulation, but can still solve the problems of a two-layered turbid medium model. 相似文献
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The photon-induced processes at the LHC provide clean experimental conditions due to absence of the proton remnants, which might produce complementary and interesting results for tests of the standard model and for searching of new physics. In the context of the littlest Higgs model with T-parity, we consider the photon-induced production of the mirror quarks at the LHC. The cross sections for various production channels are calculated and a simply phenomenological analysis is performed by assuming leptonic decays. 相似文献
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The photon-induced processes at the LHC provide clean experimentalconditions due to absence of the proton remnants, which might produce complementary and interesting results for tests of the standard model and for searching of new physics. In the context of the littlest Higgs model with T-parity, we consider the photon-induced production of the mirror quarks at the LHC. The cross sections for various production channels are calculated and asimply phenomenological analysis is performed by assuming leptonic decays. 相似文献
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重力场中的大气处于非平衡态,其温度是空间的函数,不同的等温面之间要产生热流,从而改变熵的空间分布。本文推导出重力场中的熵产生公式,并描绘出熵产生随高度变化的近似曲线。 相似文献
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Katarína Lendelová 《International Journal of Theoretical Physics》2006,45(5):887-895
The ergodic theory and particularly the individual ergodic theorem were studied in many structures. Recently the individual ergodic theorem has been proved for MV-algebras of fuzzy sets (Riečan, 2000; Riečan and Neubrunn, 1997) and even in general MV-algebras (Jurečková, 2000). The notion of almost everywhere equality of observables was introduced by B. Riečan and M. Jurečková in Riečan and Jurečková (2005). They proved that the limit of Cesaro means is an invariant observable for P-observables. In this paper show that the assumption of P-observable can be omitted. 相似文献
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本文使用一般包络方程理论推导出轴对称电子束在傍轴近似下的稳态传输过程中的发射度变化公式。结果表明电子束发射度变化与引导磁场及离子通道电场无直接关系,而仅仅与电子束分布的变化有关;发射度变化的本质是电子束的静电势能和横向运动的动能之间的转换。本文的解析结果与数值模拟结果符合得相当好。本文还定性讨论了电子束平均正则角动量对发射度变化的影响。 相似文献
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考虑电子-声子耦合强度因维度而异,导出了描述三维、二维和一维混晶中电子-声子相互作用的哈密顿量。考虑构成三元混晶的两种二元晶体的晶格失配会使混晶体积随元素组分比改变,在推导三维、二维和一维三元混晶中极化子自陷能量和重整化有效质量时计入了离子相对位移与二元晶体原胞体积的关系。结果表明:磷化物三元混晶中极化子自陷能量和重整化有效质量随元素组分的变化关系呈明显的非线性特征,对晶格适配明显、电子-声子耦合较强的材料,体积效应不可忽略。维度越低,非线性特征和体积效应越明显。 相似文献