In this work, a Genetic Algorithm boosted Least Square Support Vector Machine model by a set of linear equations instead of a quadratic program, which is improved version of Support Vector Machine model, was used for estimation of 98 pure compounds second virial coefficient. Compounds were classified to the different groups. Finest parameters were obtained by Genetic Algorithm method ...

The quantum–mechanical formulations for the second-virial, and acoustic virial, coefficients are derived spin-polarized atomic hydrogen (H?). dependence of these on temperature T as well nuclear polarization $$\zeta \;$$ is analyzed. This done first time. main inputs in computations scattering phase shifts, which obtained using Lippmann–Schwinger equation, with Silvera triplet-state potential. ...

any estimate of !.1 is attempted. It will be noted that the values from virial coefficients (±6, ±5) are appreciably larger than our value and may reflect the fact that in selecting parameters for the 12-6 core potential, the dispersion forces were underestimated leading to a corresponding overestimate of the effect of an octopole moment. An evaluation of the quantum-mechanical estimates of !.1...

An overview is given of theory and experiments on liquid crystal phases which appear in solutions of elongated colloidal particles or stiff polymers. The Onsager (1949) virial theory for the isotropic-nematic transition of thin rodlike particles is treated comprehensively along with extensions to polydisperse solutions and soft interactions. Computer simulations of liquid crystal phases in hard...