Dipolar and electronic effects on charge transport through single transition metal complexes

Charge transport through single molecular neutral monoand di-cobalt(II) complexes with π-conjugated macromolecular wire was investigated.Scanning tunnelling spectroscopy (STS) studies revealed that the mono-cobalt(II) complex showed a pronounced rectifying effect with a large rectification ratio and finely featured NDR peaks,while the di-cobalt(II) complex showed a relatively symmetric electron transport without clear NDR peaks.Th     

A global multiplicity result for two-point boundary value problems of p-Laplacian systems

In this paper,we consider the existence,nonexistence and multiplicity of positive solutions for two-point boundary value problems of p-Laplacian systems which have a singular indefinite weight and real multiparameters.For proofs,we mainly make use of the upper and lower solution method and the fixed point index theorem.To obtain a global multiplicity result,we construct a weighted space to benefit richer topology of the solution space than C 0-space.     

A comparative study of the static third-order polarizabilities of bowl/non-cage to cage structures: a structure-property correlation study

The average static third-order polarizabilities (γ) have been computed for the bowls and cages having the same number of carbon atoms. The bowls have higher (γ) than their corresponding cages. The dependence of (γ) on the average pyrimidalized angle (Θ_p) and maximal length L can be deduced. Near cages, having one open window (C₇₂ isomers), are capped with C₆ to generate five isolated pentagon rule (IPR) isomers of C₇₈ fullerenes following a circumscribing algorithm. The (γ) values for the C₇₈'s and C₇₂′s are correlated with (Θ_p) and L. The change in (γ) from C₇₂′s to C₇₈′s are correlated with a local parameter like the capped angle (α).     

Normally Ordered Operator Realization of U(1/1) Supergroup and Super-Jaynes-Cummings Model

By making use of the technique ofintegration within an ordered product (IWOP) of operators and the bosonic and fermionic coherent states we derive the normally ordered operator realization of U(1/1) supergroup. Its application in calculating the superpartition function of the supersymmetric Jaynes-Cummings model is demonstrated. The antinormally ordered realization of U(1/1) is also obtained.     

THE MICROSCOPIC CALCULATION OF THE STATISTICAL THEORY OF NUCLEAR FISSION

Based on the statistical fission theory, we have calculated the mass and kinetic energy distributions as well as other physical quantities of ²³⁵U fission induced by thermal neutron using microscopical method. That is, the quantum state densities of the fragments at scission point are calculated by means of BCS hamiltonian. The contribution of the collective deformation of fragments to the quantum state density has been taken into consideration. The potential energy of fragment is calculated by means of Strutinski procedure, and the shelling effect, pairing correlation as well as collective deformation have been taken into consideration in calculating the excitation energy at scission point. The scission point distance is treated as an adjustable parameter.Comparing with other statistical fission theories, our results give better agreement with existing experiments.     

常山碱的比色测定法

根据常山碱和异常山碱分子中的喹唑酮能碱水解而形成邻氨基苯甲酸的特点,制订常山植株中碱类含量的比色方法。邻氨基苯甲酸可与经重氮化的N-1-萘基-乙二胺偶合后,于530毫微米处读光密度。此法的灵敏度以光密度值/微克异常山碱/毫升比色液表示为0.111。用此法检查通常用的氯仿萃取法,得知其所回收的常山碱类尚不及实际含量之半。     

PROLONGATION METHOD OF FINDING BACKLUND TRANSFORMATION AND LAX-PAIR OF ERNST EQUATION AND ERNST-MAXWELL EQUATIONS

In this papsr all the known Backlund trans- formations of the Ernst equation are de}tved by ua}ing prolongation: method. As tile nonlinear realizationsp and infinite-dimensional linear realization for the prolongation structure are used, the inverse scattering equation (Lax-pair) is also derived. And the connection between BT and Lax-pair becomes evident. A systematic procedure for deriving the non-Linear realizations of the algebras is sugested based on the prolongation structure. The two knowniBackl and transformations as well as the Lax-pair of the Ernst-Maxwell equations are obtained bu the same method.     

ON THE MAGNETIC MOMENT OF W± BOSONS IN WEINBERG-SALAM MODEL

We discuss the magnetic moment of W^± bosons in W-S model. First we assume that there is no spontaneous symmetry broking. starting from the formalism of path integrals and using the gauge invariance requirement, we obtain the Ward-Takahashi identities for the 3-line VIB proper vertex functions and prove that its tensor structure is the same form as that of bare vertex couplings, which indicated the W^± bosons have neither anomalous magnetic moment nor electric quadrupole moment. For the realistic case of spontaneous symmetry breaking, we introduce in the Lagrangian an explicit symmetry breaking term. After discussing the problem of analytic continuation for mass of W^± bosons, we prove that prove that the above mentioned conclusion is still valid here.