In the LCNO theory, a simple analytic approximate expression has been derived for the exchange potential which has definite value at R = 0 and can be applied to the whole region.

Metastable Ag₈₀Cr₂₀ alloy was produced by ion mixng of Ag-Cr multilayers at liquid nitrogen temperature. The immiscibility in Ag-Cr system was accounted for in terms of the characteristics of the electronic structures of the constituent metals, and the ion beam induced alloy formation was explained by considering ion mixing as a process favoring the co-resonance process required for forming the new energy band of the metastable Ag-Cr alloy.

The painlevé property for partial differential equations introduced by Weiss, Tabor and Carnevale is investigated for various nonlinear field equations. It is conjectured that the Paintevé property can serve to decide whether a field equation is integrable or not.

An investigation of the microstructure and the mioroprocess of fracture of an eutectoid pearlitic steel has been carried out by means of electron-diffraction-contrast(EDC) and other analytical techniques. The nature of the dislocations in pro-eutectoid-ferrite and ferrite in pearlite was determined. The character of interface conjunction between ferrite and cementite was discussed. The fracture process of pearlitic steel has been analysed crystallographically.

A preliminary calculation for the low-lying branches of phonon dispersion relations of α-LiIO₃ in directions [001], [100] and [110] using a simplified model are reported. In addition, we point out that coupling between different vibration modes may be important in lattice dynamics of such crystals.

The surface loci and motion of solitons along lateral direction and the effects of dimension size or with partition on the waveform have been measured and observed carefully., An approximate solution of surface displacement also has been given, which agrees well with the experimental values.

Following our successful calculations on the electrical conductivity, the thermopower, and the Hall coefficient of metallic superlattices, we report in the present article further theoretical magnetoresistance versusmodulation wavelength curves in conformity with measurement. Experimental tests of certain predictions observed near the end of the paper are desirous.

Based on the gauge equivalence, we solve the equation of a Heisenberg ferromagnetic chain by using the inverse scattering method of the nonlinear Schrodinger equation and an explicitly obtained form of the required gauge transformation. We show that the solutions of a ferromagnetic chain by the Takhtajan's method identify with that by the above mentioned method. Then we prove the correctness of the Takhtajan equation and avoid the defects in its derivations.

A high density experiment has been performed by gas puffing on CT-6B tokamak. The changes in the plasma parameters caused by the gas puffing are described. The ionization efficiency measured in the experiment is about 0.5. The dependence of density limit on the injected gas flux is given. The maximum line-averaged electron density achieved is 4x10¹³cm^-3.

By means of optimization with a multilayer model, the damage profile can be obtained from the measured data by spectroscopic ellipsometry without stripping. The damage profiles of 40keV As⁺ implanted Si at doses of 4 x 10¹³ and 1. 4 x 10¹⁴ ions cm^-2 are shown and compared with those determined by Rutherford backscattering.

Most recent data for the differential cross section and polarisation for the hypercharge exchange reaction π⁺p → K⁺Σ⁺ and its line-reversed partners is explained by using the simple Regge pole model with phenomenological residue functions.

A multi-state trapping model involving positron trapping at dislocations is proposed, in which the effect of positron detrapping can be omitted, and using the data in some literature, we have estimated the jog interval on the dislocation line. The results obtained are of a reasonable order of magnitude.