Quantum State Transfer in Trapped-Ion-Cavity Systems

We study the information transfer and entanglement transfer in a system consisting of single trapped ions in cavities by the three-mode cross-Kerr-like interaction among the cavity field （photons）, the centre-of-mass motion （phonons） and the internal state of the trapped ion in the Lamb-Dicke and large detuning regime.     

Photon-Assisted Conductance Structure for a Quantum Dot

We investigate theoretically the electron transport of a two-level quantum dot irradiated under a weak laser field at low temperatures in the rotating wave approximation. Using the method of the Keldysh equation of motion for nonequilibrium Green function, we examine the conductance for the system with photon polarization perpendicular to the tunnelling current direction. It is demonstrated that by analytic analysing and numerical examples, a feature of conductance peak splitting appears, and the dependence of conductance on the incident laser frequency and self-energy are discussed.     

Vapour-to-Liquid Nucleation in Associating Lennard-Jones Fluids with Multiple Association Sites

The excess Helmholtz free energy functional for associating Lennard-Jones （L J） fluid is formulated in terms of a weighted density approximation for short-ranged interactions and a Weeks-Chandler-Andersen approximation for long-range attraction. Within the framework of density functional theory, phase equilibria, vapour-liquid surface tension and vapour-liquid nucleation properties including the density profile, work of formation, excess number of particles and critical supersaturation are investigated for associating LJ fluids with different numbers of association sites （M =1,2, 3, 4） per particle. The influences of association energy and association sites on phase equilibria, surface tension and vapour-liquid nucleation properties are discussed.     

MIL⁃53(Al)催化甲基氯硅烷的歧化机理

利用B3LYP/6?311++G(3df,2pd)方法计算了MIL?53(Al)的3个位点催化甲基氯硅烷以制备二甲基二氯硅烷的活性差异,并对反应通道、能量、过渡态虚振模式、内禀反应坐标(IRC)、关键原子间距的变化等进行了分析和讨论,得出了一致的结论:1~3号活性位催化的主反应速控步的活化能分别为157.15、155.31和123.44 kJ·mol-1;副反应速控步的活化能分别为206.48、214.87和166.07 kJ·mol-1。MIL?53(Al)能顺利催化歧化反应的原因在于其催化中心Al—O—H上的Br?nsted酸H,活性的差异来源于其配位环境的不同。     

最短路径在Arcgis空间分析中的实现

针对公路修建规划过程中如何选址的问题,提出了一种结合地理信息系统技术的选址模型,该模型是利用Arcgis中的Spatial Analyst模块,数据基础是研究区的DEM数据,通过对河流、坡度、起伏度这三种地形影响因子进行综合处理后,实现了最短路径的选择,并结合Arcgis中的三维分析扩展模块3D Analyst实现了最短路径在三维地形中的可视化,从而为用户提供一个更加直观的可视化环境.     

二十面体群C-G系数计算

本文简要介绍了计算Ｃ Ｇ系数的生群元矩阵方程法，给出计算二十面体群Ｃ Ｇ系数时采用的简化计算方法，并给出了Ⅰ群Ｃ Ｇ系数的计算结果。     

Influence of structural defects on the optical properties of strongly coupled Au nanoshell arrays

The effects of different defects on optical properties and plasmon resonances properties of Au nanoshell arrays were investigated by using the finite-difference time-domain(FDTD) theory.It is found that the optical properties of the nanoshell arrays are strongly influenced by different defects.We show that when the hollow Au nanoshell arrays are placed in air,there is a wide photonic band gap(PBG) in the infrared region,but the band gap becomes narrower as we introduced different defects.Based on the distributions of electric field component E z and the total energy distribution of the electric and the magnetic field,we show that there exhibit dipoles field distributions for the plasmon mode at the long-wavelength edge of the band gap,but composite higher order modes are excited at the short-wavelength edge of the band gap.The plasmon resonant modes also can be controlled by introducing defects.     

表面改性的火焰法碳纳米管/聚苯乙烯复合材料的制备与性能

通过傅立叶变换红外光谱(FT-IR)和热失重分析(TGA)等方法研究了火焰法制备的多壁碳纳米管(F-MWCNT)的结构,发现F-MWCNT表面带有一定量的羧基等活性基团.将F-MWCNT直接与氯化亚砜及十六烷基胺反应,成功制备了其酰胺功能化产物(H-MWCNT).扫描电子显微镜(SEM)和动态力学分析(DMA)结果表明,F-MWCNT及酰胺化产物H-MWCNT明显改善了相应的聚苯乙烯(PS)/碳纳米管复合材料的界面结构和力学性能.     

（∈,∈Vq（λ,μ）-模糊（弱）正则子半群

给出了(∈,∈V q(λ,μ))-模糊(弱)正则子半群和广义模糊(弱)正则子半群的概念及刻画,并获得一些充分,必要条件.其主要结果推广了通常模糊代数里的一些相应结果.     

二乙氧基膦酰乙酸叔丁脂的热裂解反应

二烷氧基膦酰乙酸酯为一类重要的Wittig-Horner试剂,也可用作增塑剂、防火剂和萃取剂等。因此研究这类化合物的性质具有实际意义,我们已报道过用相转移催化的简便方法合成二烷氧基膦酰乙酸酯,并总结了它们的正、负离子质谱,探讨其断裂规律及可能的断裂途径。但有关这类化合物的热裂解反应至今研究得尚不多。1960年Magerlein等曾