Wellbore constrained equations were deduced considering separated layer water injection in a heavy oil model. A numerical model constrained by fine separated layer water injection was constructed. A linear system consisted of a seven-diagonal sparse coefficient matrix with attached columns and rows was derived, which was solved by partitioned matrix multiplication combined with preliminary treatment of conjugate gradient. Development effects of separated layer water injection and generalized water injection were compared and influences of segmentation and injection allocation models were assessed.

We choose a confined point-contact geometry as research model. Steady-state oscillations of magnetic vortex driven by a spin-polarized current are calculated with analytical calculations based on Thiele's equation. It indicates that magnetic vortex can maintain steady oscillations in a specific current range. Current density range depends on nanocontact dimensions and dot aspect ratios. Both orbital radius and frequency of steady oscillations increases with current density. Adjustable range of oscillation frequency decreases dramatically with increasing nanoeontaet size.

Monte Carlo method is used to study hysteresis loops of FM/AFM systems with FM core embedded in an AFM matrix in a classical Heisenberg model. Magnetocrystalline anisotropy and exchange interaction are considered. It indicates that the shape of hysteresis loops changes with reverse maximal external field. The magnetization shows a jumping transition to metastable equilibrium with an increasing of external fields along positive z axis. The jumping range is independent of reverse maximal external field. With an increasing of AFM magnetocrystalline anisotrepy, exchange bias is obvious and larger external fields are needed for magnetization saturation. With an increasing of AFM exchange interaction, new hysteresis loops may appear in positive and negative external fields.

Monte Carlo simulation is used to study the magnetic properties of magnetic monolayer films with an Ising-like model in which the exchange interaction and dipolar interaction are considered.The system shows an abnormal magnetization with an increasing of the dipolar interaction at low reduced temperatures.The magnetization is divided into two stages.The magnetization becomes difficult with increasing temperature in low external fields.The reverse process occurs in high external fields.This magnetization behavior results in an abnormal phenomenon that the magnetic entropy changes above zero at low temperatures in external fields.An accurate method is introduced to deal with the long-range interaction.

A nodal Green's function method for cylindrical geometry for multidimensional neutron diffusion calculation is developed.First,the neutron diffusion equation is converted to three coupled one-dimensional partial flux equation through transverse integration.For the radial partial flux equation,the differential term is decomposed to a diffusion term plus a modified term,which is called modified source.Therefore,the three equations show the same form as for slab geometry.Second,by way of the second kind boundary condition Green's function for slab geometry,the three equations are integrated to obtain the integral equations.For the modified source term,it can be converted to Green's function's differentiation term through partial integration.At last,the equations are solved by source iteration method.Through benchmark computation,this method shows high speed and high extent of accuracy.It is a effective method for reactor design of three dimensional cylindrical geometry and for nuclear fuel management calculation.

The programmed quantum mechanical CI method in Gaussian 82 program, which is publicly recognized, is used in this paper. An ab initio calculation is made, on the basis of using a relatively large basis set 6-31G^**, on the four kinds of configuration formed by the two H₂ molecules. In so doing, the existence of the abnormal structure within the short-range area of the interaction potential curve is confirmed. In this paper, the rules of H₂ molecule bond length changing with the distance between center of mass of two molecules and the corresponding charge redistribution are also reported.

A formula for calculation of the thermal neutron scattering law for the anisotropic microcrystal which is based on Fourier transform is derived in the paper. A formula for calculation of Debye-Waller factor is derived,too.The analyses for calcuated results of anisotropic graphite are presented. It is shown that the method is effective and it is necessary to take the co-rrect value of Debye-waller. factor.

FORTRAN procedure for computing multiple integration by theory of number is compiled.More than one s-dimension integrals with same limit of integration (definite or varying limit) and defferent integrand (including discotinuous function) can be computed simultaneously.

Some of the features and problems involved in the thermal neutron law code RSLT-1 which is based on the method of Fourier transform are discussed. The analyses of the calculated results of some actual moderators are presented.