实际Paul阱的电参量计算

用边界元方法，计算了实际Ｐａｕｌ阱，当存在开孔和轴向装配误差时环帽极的面电荷密度及阱的电容值，给出了它们随孔径大小变化的规律，从而为实验中选择孔径的大小提供了理论依据，同时也有助于囚禁离子动力学参数的计算     

Penning阱中的量子跃迁

对极低温下囚禁在Ｐｅｎｎｉｎｇ阱中的单个离子在受到外部扰动时出现的不稳定现象作了量子处理。首先，求解了系统的薛定谔方程，并根据所得的波函数性质，得出了阱内的量子跃迁规则，然后，在此规则下，定量描述了离子在受到扰动后的不稳定表现。     

射频阱中原子团簇离子的选择存储及其应用

ＴｒｉｐｌｅＤｉｆｅｒｅｎｔｉａｌＣｒｏｓＳｅｃｔｉｏｎｓｆｏｒＥｌｅｃｔｒｏｎＩｍｐａｃｔＩｏｎｉｚａｔｉｏｎｏｆＨｅｌｉｕｍ－ｌｉｋｅＬｉｔｈｉｕｍＳｈｉＱｉｃｕｎＣｈｅｎＺｈａｎｇｊｉｎＣｈｅｎＪｉＸｕＫｅｚｕｎＤｅｐａｒｔｍｅｎｔｏｆＭｏｄ...     

褶纹冠蚌肝脏线粒体DNA的初步研究

对褶纹冠蚌肝脏线粒体mtDNA进行了提取,纯化,内切酶分析和电镜观察。BamHI和Bgl I单酶切结果分别产生两个和三个片段,测得其分子大小为15.49kb,分子量为9.57×10~6。电镜观察显示mtDNA呈环形,大小为15.40kb。褶纹冠蚌肝脏DNA与其它动物的mtDNA在形状和大小上相似。     

Pt、Cu电极上Fe(CN)_6~(4-)和SCN~-电化学行为的现场FTIR反射吸收光谱研究

本文报道了一种简单有效的现场红外反射吸收光谱电解池设计。对Fe(CN)_~(4-)和SCN~-在Pt、Cu电极上的吸附及电化学反应进行了研究。     

Ground State Energy of Unitary Fermion Gas with the Thomson Problem Approach

The dimensionless universal coefficient ε defines the ratio of the unitary fermions energy density to that for the ideal non-interacting ones in the non-relativistic limit with T = 0. The classical Thomson problem is taken as a nonperturbative quantum many-body arm to address the ground state energy including the low energy nonlinear quantum fluctuation/correlation effects. With the relativistic Dirac continuum field theory formalism, the concise expression for the energy density functional of the strongly interacting limit fermions at both finite temperature and density is obtained. Analytically, the universal factor is calculated to be ε= 4/9. The energy gap is△= 5/8k^2f/（2m）.     

Lipschitz equivalence of self-similar sets with triangular pattern

In this paper, we discuss the Lipschitz equivalence of self-similar sets with triangular pattern. This is a generalization of {1, 3, 5}-{1, 4, 5} problem proposed by David and Semmes. It is proved that if two such self-similar sets are totally disconnected, then they are Lipschitz equivalent if and only if they have the same Hausdorff dimension.     

THE RIEMANN PROBLEM FOR THE NONLINEAR DEGENERATE WAVE EQUATIONS

In this paper we consider the Riemann problem for the nonlinear degenerate wave equations. This problem has been studied by Sun and Sheng, however the so-called degenerate shock solutions did not satisfy the R-H condition. In the present paper, the Riemann solutions of twelve regions in the v u plane are completely constructed by the Liu-entropy condition. Our Riemann solutions are very different to that one obtained by Sun and Sheng in some regions.     

OPTIMAL PORTFOLIO ON TRACKING THE EXPECTED WEALTH PROCESS WITH LIQUIDITY CONSTRAINTS

In this article, the authors consider the optimal portfolio on tracking the expected wealth process with liquidity constraints. The constrained optimal portfolio is first formulated as minimizing the cumulate variance between the wealth process and the expected wealth process. Then, the dynamic programming methodology is applied to reduce the whole problem to solving the Hamilton-Jacobi-Bellman equation coupled with the liquidity constraint, and the method of Lagrange multiplier is applied to handle the constraint. Finally, a numerical method is proposed to solve the constrained HJB equation and the constrained optimal strategy. Especially, the explicit solution to this optimal problem is derived when there is no liquidity constraint.     

大气微波等离子体炬装置设计及实验研究

大气微波等离子体矩具有无电极放电污染、无需昂贵真空设备和易于连续化加工等特点,具有广阔的应前景.本文设计了一套基于BJ26波导的微波能利用率高、稳定性好的大气微波等离子体装置.该装置由最高输出功为800W的2.45GHz程控微波源、调配系统、波导谐振腔和耦合天线组成.利用加装游标卡尺的接触式短路活塞,微波反射面位置进行...