抛物量子点中极化子的温度依赖性

根据Pekar类型变分法在电子与声子强耦合的条件下计算了抛物量子点中强耦合极化子的基态能量.讨论了电子-声子耦合强度,量子点受限长度对基态能量的影响,同时引进温度参数并讨论了其对基态能量的影响,结果得出在低温的条件下,耦合强度和受限长度对基态的能量影响起主要作用;在高温的条件下,温度对基态的能量影响起主要作用,而耦合强度与受限长度的影响很小.     

一致星象和凸象超几何函数的一些性质

介绍了(高斯)超几何函数属于一致星象函数和一致凸函数的某些子类的一些性质.还考虑了与超几何函数相关的算子.     

一类由从属关系定义的m-折对称双单叶函数的系数估计及Fekte-Szego不等式

本文研究了一类由从属关系定义的$m$-折对称双单叶函数的系数估计及Fekte-Szego不等式,所得结果改进或推广了已有部分作者的结论.     

具有无穷多个不连续点Sturm-Liouville算子的Friedrichs扩张

研究了一类内部具有无穷多个不连续点的Sturm-Liouville问题,即内部具有无穷多个转移条件的Sturm-Liouville问题.把此类问题放到一个新的空间中去考虑,定义了与转移条件相关联的最小算子Cmin和最大算子Cmax,给出了最小算子Cmin是下有界的一个充分条件,进一步由边界条件刻画了具有下有界的最小算子Cmin的Friedrichs扩张.     

聚乙二醇稳定的RuB纳米粒子催化苯选择加氢为环己烯的性能研究

PEG稳定的RuB纳米粒子对苯选择加氢制备环己烯显示出良好的催化性能,在不添加硫酸锌的条件下,该体系催化的苯选择性加氢中,环己烯收率高达29%。这一体系的高催化性能是由于PEG稳定的RuB纳米粒子,使催化剂表面的亲水性增强,提高了环己烯的选择性。     

1,3,5-Trihydroxybenzene as a film-forming additive for high-voltage positive electrode

1,3,5-trihydroxybenzene (THB) is examined as a film-forming additive for over-lithiated layered oxide positive electrode. The surface film generated from the carbonate-based electrolyte (THB-free) is thermally/electrochemically unstable to be dissolved or decomposed during elevated-temperature cycling. Due to this instability, electric charges are consumed in every cycle for electrolyte decomposition to give a low coulombic efficiency. In contrast, the protective film that is generated by oxidative decomposition of the additive (THB) prior to the carbonate electrolyte is robust enough to remain intact. As a result, a full-cell comprising graphite/over-lithiated layered oxide gives a higher coulombic efficiency and longer life cycle.     

一类3×3上三角算子矩阵的点谱和剩余谱

本文完全描述了一类3×3上三角算子矩阵的点谱和剩余谱,并将剩余谱表示为一些互不相交子集合的并集,在l~2×l~2×l~2中构造了具体例子说明该算子的剩余谱可能非空,从而验证了所得结果的有效性.     

由Srivastava-Khairnar-More算子定义的$p$叶函数类的包含关系

In the present paper, we use the methods of differential subordination and convo- lution to investigate some inclusion properties for certain classes of p-valent analytic functions in the open unit disk, which are associated with the Srivastava-Khairnar-More operator. The results presented here include several previous known results as their special cases.     

The ground-state lifetime of polaron in a parabolic quantum dot

This paper reports that the ground-state energy of polaron was obtained with strong electron-LO-phonon coupling by using a variational method of the Pekar type in a parabolic quantum dot. Quantum transition is occurred in the quantum system due to the electron-phonon interaction and the influence of temperature. That is the polaron transit from the ground-state to the first-excited state after absorbing a LO-phonon and it causes the change of the polaron lifetime. Numerical calculations are performed and the results illustrate that the ground-state lifetime of the polaron will increase with increasing the ground-state energy of polaron and decrease with increasing the electron-LO-phonon coupling strength, the confinement length of the quantum dot and the temperature.     

抛物量子点中弱耦合束缚极化子的相互作用能

研究了抛物量子点中弱耦合束缚极化子的性质,采用改进的线性组合算符和幺正变换方法导出了束缚极化子的振动频率、有效质量和相互作用能。讨论了量子点的有效受限长度、电子LO声子耦合强度和库仑场对抛物量子点中弱耦合极化子的振动频率、有效质量和相互作用能的影响。数值计算结果表明:弱耦合束缚极化子的振动频率和相互作用能随有效受限长度的减少而急剧增大,振动频率随库仑势以及电子LO声子耦合强度的增加而增加,而相互作用能随库仑势以及电子LO声子耦合强度的增加而减小。有效质量仅与电子LO声子耦合强度有关。