野外稀土快速分析方法在陇川地区稀土找矿中的应用

近年来,滇西陇川、梁河、腾冲等地陆续发现了多个离子吸附型稀土矿床,系统的勘查技术方法应用起到了至关重要的作用,野外稀土快速分析方法是离子吸附型稀土矿勘查中一项简单实用的技术手段,地质工作人员在野外利用简易的装置,采用(NH4)2SO4浸泡过滤矿样,再用草酸沉淀,通过观察沉淀物的有无和多少即可快速判断样品中离子相稀土的有...     

An ab initio study of the Ne-CO complex

A new ab initio potential energy surface of the Ne-CO complex is developed using single and double excitation coupled-cluster theory with noniterative treatment of triple excitations [CCSD(T)].The potential has a minimum value of 49.396 cm 1 at R e = 6.40a 0 with approximately T-shaped geometry(θ e = 82.5).Bound state energies are calculated up to J = 12.The theoretically predicted transition frequencies and spectroscopic constants are in good agreement with the available experimental results.     

相干态的小波变换

根据小波变换的量子力学机理, 通过选取不同的系数, 构造出两组新的母小波函数. 在此基础上, 利用正规乘积内积分技术, 推导出相干态和粒子数态的小波变换, 并数值模拟出它们的小波变换图谱.     

Control of beam halo-chaos by Gauss function in the triangle periodic-focusing channel

This paper studies the Kapchinsky-Vladimirsky （K-V） beam through a triangle periodic-focusing magnetic field by using the particle-core model. The beam halo-chaos is found, and an idea of Gauss function controller is proposed based on the strategy of controlling the halo-chaos. It performs multiparticle simulation to control the halo by using the Gauss function control method. The numerical results show that the halo-chaos and its regeneration can be eliminated effectively, and that the radial particle density is uniform at the centre of the beam as long as the control method and appropriate parameter are chosen.     

基于纠缠态表象的复脊波变换理论

本文基于连续变量量子态构造小波变换的研究结果, 从经典信息的连续脊波变换出发, 利用有序算符内ket-bra型积分, 构造连续复脊波变换对应的量子算符和表象表示, 采用表象的内积运算与态矢投影展开, 研究量子光学态的复脊波变换理论. 关键词： 有序算符内积分技术 复脊波变换 纠缠态表象 相干态     

单光分束器的量子变换算符研究

针对理想情况下单光分束器,得到了其对应的变换矩阵.用相干态表象和有序算符内积分技术,给出其对应的幺正变换算符.纠缠态的实验制备方案,说明单光分束器在量子信息源研究中具有十分重要的作用.     

纠缠态表象在热场动力学中的应用

大多数量子系统都与外界环境之间存在某种热交换或热纠缠,受量子光学双光子纠缠态表象启发,本文将建立热纠缠态表象．根据Takahashi与Umezawa提出的热场动力学理论,热场混合态可以等效为一个量子纯态．因此,任意量子态在环境温度不为零（T≠0）时,系综期望值可以等效成对量子纯态的平均值．在温度趋向于无穷大时,可以得到热真空态的极限形式．类似于相干态,利用平移算符对热真空态极限形式做平移操作后,即可得到热相干态（也称为热纠缠态）．热纠缠态表象可以将密度算符ρ=|m〉〈n|中的左矢部分转化为与环境有关的ρ=|m〉〈n|,从而可以使讨论量子态在热环境的演化变得方便快捷．     

基于Radon逆变换的相对平行直线扫描CT解析重建

计算机断层成像(CT)技术广泛应用于医学诊断、工业检测等领域.近年来,提出了一种相对平行直线扫描CT(PTCT),采取射线源-探测器对物体作相对平行直线移动的扫描方式来采集数据,其结构简单、应用灵活、成本低.针对PTCT图像重建,提出了一种基于Radon逆变换的解析重建算法(PTCT-DHB).相比于经典的PTCT滤波...     

经高斯函数光滑的Wigner算符的性质

鉴于通常的Wigner算符是不正定的,我们提出将其经过以参数k表征的高斯函数光滑以后的广义Wigner算符,在证明其正定和完备性以后,将它发展为量子光场密度算符及其经典对应的新理论,特别地当k=1时,它退化为了在相干态表象中的p-表示.     

Control of Beam Halo-Chaos Based on Self-Field-Intensity of Particle Beam

The KV beam through an axisymmetric periodic-focusing magnetic field is studied using the particle-core model. A new variable of the self-field-intensity of particle beam is selected, and an idea of self-field feedback controller is proposed based on the variable for controlling the halo-chaos. We perform multiparticle simulation to control the halo by using the self-field feedback controller. The numerical results show that the halo-chaos and its regeneration can be eliminated effectively, and that the density uniformity can be found at the centre of beam as long as an appropriate control method is chosen. The control method may be operated in the experiment, because field intensity measurement is easy.