态|ψ(3)5〉q中广义电场的2(2m+1)次方Y压缩特性

利用多模压缩态理论,研究了由多模复共轭相干态|{Z*j}〉q(j=1,2,3,…,…,q)、多模复共轭相干态的相反态|{-Z*j}〉q和多模虚相干态|{iZj}〉q的线性叠加所组成的第Ⅴ类三态叠加多模叠加态光场|ψ(3)5〉q中广义电场分量的等幂次N次方Y压缩特性.结果发现:当压缩次数N=2p且p=2m+1(m=0,1,2,…,…)时,在一定的条件下,态|ψ(3)5〉q的广义电场分量(即第二正交相位分量)可呈现出周期性变化的、偶数次的等幂次2(2m+1)次方Y压缩效应.     

线性混合模型参数的一种新估计

线性混合模型的未知参数分两类, 一类是固定效应, 一类是方差分量. 提出了固定效应和方差分量的一种新估计, 称为谱分解估计, 并证明了新估计的一些重要统计性质. 新估计的突出特点是, 固定效应的估计是具有良好统计性质的线性估计. 新方法被应用于经济、金融和 机械测量方面的两个重要模型, 所得到的估计都具有很好的统计和实用意义.     

单层介质膜的反射起偏

本文讨论了单层介质膜反射起偏的特点,并导出起偏角所满足的关系式。     

Thermodynamics of 1D N-Component Bariev Model Under Open Boundary Conditions

The thermodynamic Bethe ansatz equations and free energy for 1D N-component Bariev model under open boundary conditions are derived based on the string hypothesis for both, a repulsive and an attractive interaction. These equations are discussed in some limiting cases, such as the ground state, weak and strong couplings.     

Multi-component Levi Hierarchy and Its Multi-component Integrable Coupling System

A simple 3M-dimensional loop algebra X is produced, whose commutation operation defined by us is A1 as simple and straightforward as that in the loop algebra A1. It follows that a general scheme for generating multi-component integrable hierarchy is proposed. By taking advantage of X, a new isospectral problem is established, and then by making use of the Tu scheme the well-known multi-component Levi hierarchy is obtained. Finally, an expanding loop algebra FM of the loop algebra .X is presented, based on the FM, the multi-component integrable coupling system of the multi-component Levi hierarchy is worked out. The method in this paper can be applied to other nonlinear evolution equation hierarchies.     

Atomic Tunneling Effect in Two-Component Bose-Einstein Condensates with a Coupling Drive

In this paper, we have studied the atomic population difference and the atomic tunneling current of two-component Bose-Einstein condensates with a coupling drive. It is found that when the two-component Bose Einstein condensates are initially in the coherent states, the atomic population difference may exhibit the step structure, in which the numbers of the step increase with the decrease of the Rabi frequency and with the increment of the initial phase difference. The atomic population difference may exhibit collapses, and revivals, in which their periods are affected dramatically by the Rabi frequency and the initial phase difference. The atomic tunneling current may exhibit damping oscillation behaviors, and exist the step structure for the time range of 10^-10 ～ 10^-9 second.     

量子Monte Carlo处理激发态

提出了用于电子激发态的剩余函数变分量子ＭｏｎｔｅＣａｒｌｏ（ＳＦＶＭＣ）方法,已经证明：若激发态的初始波函数与基态的初始波函数属于对称性不同的不可约表示时,该激发态的ＳＦＶＭＣ方法与基态的ＳＦＶＭＣ方法完全相同;若激发态的初始波函数与基态的初始波函数有相同的对称性时,只要对激发态的初始波函数作正交性修正,则其态的ＳＦＶＭＣ方法亦可推到该激发态的情况。文章导出了这第二类激发态的ＳＦＶＭＣ方法的详细计     

多孔准直器性能的数值研究

在高能闪光照相中,多孔准直器法是用来扣除记录平面上照射量散射分量的技术。本文中初步研究了四种情况下多孔准直器的性能：（ａ）改变准直角θ;（ｂ）增加后保护锥到记录平面的距离;（ｃ）使用陡坡准直器;（ｄ）改变准直孔的孔径。结果表明：对全尺寸客体的闪光照相系统实施以上前三条措施之后,尽管前记录平面上的直散比ＤＳＲ与后记录平面上的照射量ＤＤ成分百分比均有所提高,但多孔准直器性能仍然不理想;也就是说,后记录     

分量序列的构造和性质分析

以迹函数和m-序列为基础,对分量序列进行研究,分析其结构和性质.得到其周期、线性复杂度和自相关性的性质,并且证明其满足m-序列的保持性,通过研究得到的结论,给出具有理想二级自相关等良好性质的序列的构造方法.     

基于主分量分析的变分贝叶斯独立分量分析的盲源分离方法

针对传统基于随机初始化的变分贝叶斯独立分量分析(VBICA)方法的不足,即随机初始化导致经过不同的学习得到的分离结果存在差异性,提出了一种基于主分量分析(PCA)的变分贝叶斯独立分量分析的盲源分离方法,在提出的方法中,利用PCA来初始化模型参数。并与传统的变分贝叶斯独立分量分析方法进行对比。仿真结果验证了该方法的有效性,提出的方法不仅比传统的VBICA方法取得了更好的分离性能,并且保持分离结果的稳定性,克服了传统的VBICA方法的不足。