By comparing the calculated k_s with the experimental results,when σ_2=5.63A and ion's diameter is in electronic density scale, the agreement between theory and experimental result is good.

The quasi-ste dy density profile determined by the ponderomotive force in a laser plasma is studied. The dependences of the local density scale length, the lengths of upper and lower density shelves and the average density scale length at lower shelf on the incident light intensity and time are derived.

It is shown that after the quasi-steady state is reached, with the lapse of time the lengths of upper and lower density shelves and the average density scale length at lower shelf rise, and the density scale length in the critical density region increases slightly.

The rather simple "difference formula" in the range of high D2O-concentration together with a density scale for pure D2O gained by interpolation suffice for most practical purposes.

A general principle is outlined: the coupling phases are strongly dependent on density scale heights and perturbation scales, while the amplitudes are little affected by these two factors.

Comparisons of recent data of density scale height at 544-877 km with CIRA model

In order to obtain the observed scale height at high altitude a calculation method has been derived for determining density scale height from the difference between two satellite's heights.

According to the difference of the orbital heights of these two balloon satellites from 19 September 1990 to 9 March 1991, 67 values of density scale height at heights of about 544-877 km were determined.

The differential cross section and total cross section of high-energy electron impact excitation can be calculated by Born approximation. The differential cross section is propotional to the so called generalized oscillator strength. The target atom or ion may be excited to infinite number of bound states and adjoint continuum states which can be treated in an unified manner by Quantum Defect Theory. Thus, we define generalized oscillator strength density (GOSD) as the generalized oscillator strength per unit...

The differential cross section and total cross section of high-energy electron impact excitation can be calculated by Born approximation. The differential cross section is propotional to the so called generalized oscillator strength. The target atom or ion may be excited to infinite number of bound states and adjoint continuum states which can be treated in an unified manner by Quantum Defect Theory. Thus, we define generalized oscillator strength density (GOSD) as the generalized oscillator strength per unit of excitation energy. We have calculated the GOSD's of the lithium-like isoelectronic se-quence(Li, Be+, B++, C3+, Ne7+, Na8+, K16+) for excitation from the ground state to S, P, D and F channels. The scaling relation along isoelectronic sequence is discussed.

The quasi-ste dy density profile determined by the ponderomotive force in a laser plasma is studied. The dependences of the local density scale length, the lengths of upper and lower density shelves and the average density scale length at lower shelf on the incident light intensity and time are derived. It is shown that after the quasi-steady state is reached, with the lapse of time the lengths of upper and lower density shelves and the average density scale length at lower shelf rise, and the density scale...

The quasi-ste dy density profile determined by the ponderomotive force in a laser plasma is studied. The dependences of the local density scale length, the lengths of upper and lower density shelves and the average density scale length at lower shelf on the incident light intensity and time are derived. It is shown that after the quasi-steady state is reached, with the lapse of time the lengths of upper and lower density shelves and the average density scale length at lower shelf rise, and the density scale length in the critical density region increases slightly.

The salt effect coefficients (k_s) of nonelectrolyte solute dissoving in nonaqueous electrolyte solutions, which is composed of salt (NaI,or KI) and sulfolane, was calculated by the scale particle theory. Considering the distribution behavior of the particles in solution and the forms of molecular interactions,we calculated K_s in different ways. 1. The term of hard sphere interaction (k_α) was calculated by Masterton -Lee's equation. The term of soft sphere interaction (k_β) was treated by Y. Hu's radial distribution...

The salt effect coefficients (k_s) of nonelectrolyte solute dissoving in nonaqueous electrolyte solutions, which is composed of salt (NaI,or KI) and sulfolane, was calculated by the scale particle theory. Considering the distribution behavior of the particles in solution and the forms of molecular interactions,we calculated K_s in different ways. 1. The term of hard sphere interaction (k_α) was calculated by Masterton -Lee's equation. The term of soft sphere interaction (k_β) was treated by Y. Hu's radial distribution funtion method, ie.take the first coordination circle as in-order, and out of the circle as random mixing. Fur-thermore, we take the following interaction form into calculation, dipole-dipole, dipole-induced dipole, dipole-charge of ion and charge-induced dipole. The results shown that the treatment method used is better than others. 2. The molecular hard sphere diametere σ and energy parameter e/k were obtained from various empirical equations. These equations contain some parameters which can be got easily. By comparing the calculated k_s with the experimental results,when σ_2=5.63A and ion's diameter is in electronic density scale, the agreement between theory and experimental result is good.