Generation of Helical and Axial Magnetic Fields by the Relativistic Laser Pulses in Under—dense Plasma：Three—Dimensional Particle—in—Cell Simulation

The quasi-static magnetic fields created in the interaction of relativistic laser pulses with under-dense plasmas have been investigated by three-dimensional particle-in-cell simulation.The relativistic ponderomotive force can drive and intense electron current in the laser propagation direction,which is responsible for the generation of a helical magnetic field.The axial magnetic field results from a difference bean of wave-wave,which drives a solenoidal current.In particular,the physical significance of the kinetic model for the generation of the axial magnetic field is discussed.     

Excitation of Electromagnetic Waves by an Electron Ring Beam in a Magnetized Plasma Waveguide

We study the resonant interactions between an electron ring beam and plasma waveguide modes,This is motivated by the research of radio emission in low solar corona.We consider a density-depleted duct(above an active region near a flare site)that may be treated as a magnetized plasma waveguide.The electromagnetic waves excited in the wveguide are classified into the so-called E-type and B-type waves.The results show that there are two unstable modes of B-type waves propagating parallel and anti-parallel to the direction of the electron beam.The effect of the finite radius and boundary conditions of the waveguide on the excitation of the electron beam.The effect of the finite radius and oundary conditions of the waveguide on the excitation of waveguide modes is important.For a given B-type mode,the smaller the radius R,the larger the temporal and spatial amplification important.For a given B-type mode.the smaller the radius R ,the larger the temporal and spatial amplification rate,we suggest that these excited waveguide modes could be one of the processes respondsible for the observed solar radio emission.     

Entanglement Swapping and Disentanglement via an Entangled State of Atoms Interacting with a Cavity Field

We consider entanglement swapping and disentanglement schemes via an entangled state of three two-level atoms interacting with a coherent field.When a two-level atom C,entangled with two other two-level atoms A and B,is injected into a high-Q cavity and atoms A and B are far away from the cavity,the entanglement swapping or disentanglement can be realized by carrying out the measurement on the atom C and by selecting an appropriate interaction time of atom C with the coherent field.     

重离子裂变反应中的能级密度参数和裂变几率

本工作从Nilsson单粒子能级入手，计算了形变核^186Os、^187Ir、^189Os和^193Au作为激发函数的固有能级密度参数aint和有效能级密度参数（包括核集体运动效应）aelf，由这样能量相关的能级密度参数计算的理裂几率Pf（U）与本工作的裂变几率符合很好。     

Direct Current Hopping Conductivity in One—Dimensional Nanometre Systems

A one-dimensional random nanocrystalline chain model is established.A dc electron-phonon-field conductance model of electron tunnelling transfer is set up,and a new dc conductance formula in one-dimensional nanometre systems is derived.By calculationg the dc conductivity,the relationship among the electric field,temperature and conductivity is analysed.and the effect of the crystalline grain size and the distrotion of interfacial atoms on the dc conductance is discussed.The result shows that the nanometre system appears the characteristic of negative differential dependence of resistance and temperature at low temperature.The dc conductivity of nanometre systems varies with the change of electric field and trends to rise as the crystalline grain size increases and to decrease as the distroted degree of interfacial atoms increases.     

Adding a Scripting Interface to Gaudi

Athena,the Software Framework for ATLAS‘ offline software is based on the Gaudi Framework from LHCb^1,The Processing Model of Gaudi is essentially that of a batch-oriented system -a User prepares a file detailing the configuration of which Algorithms are to be applied to the input data of a job and the parameter values that control the behavior of each Algorithm instance.The Framework then reads that file once at the beginning of a job and runs to completion with no further interaction with the User. We have enhanced the Processing Model to include an interactive mode where a User can cotrol the event loop of a running job and modify the Algorithms and parameters on the fly.We changed only a very small number of Gaudi Classes to provide access to parameters from an embedded Python interpreter,No change was made to the Gaudi Programming Model.i.e., developers need not change anything to make use of this added interface,We present details of the design and implementation of the interactive Python interface for Athena.     

Be,Mg和Ca原子电四极矩E2^1D—^1S跃迁的能级和跃迁概率

利用多组态Dirac-Fock广义扩展平均能级（MCDF－EAL）方法系统地计算了重要的中性原子Be,Mg和Ca单光子电四极矩E2^1D－^1S光谱跃迁概率,计算中考虑了重要的核的有限体积效应,Breit修正和QED修正,所得结果和最近的实验数据及理论计算值进行了比较,此外还从理论上预言了Ba和Mg单光子电四极矩E2^1D－^1S光谱跃迁概率过程,在库仓规范中,跃迁概率A（Be)=3884.9s^-1,跃迁概率A（Mg)=2357.2s^-1和跃迁概率A（Ca)=48.1s^-1。     

思特奇预付费业务管理系统

在思特奇公司针对移动通信运营商的运营服务支撑系统（ＢＯＳＳ）全面解决方案中,思特奇预付费业务管理系统（ＳＩＴＥＣＨＰｒｅＰａｉｄＳｏｌｕｔｉｏｎ）就是随着移动通信业务的飞速发展,顺应提高运营商竞争力的需要,以及扩大市场占有率和服务种类的要求而及时...