were carried out for re-
duced chemical potentials up to saturation under each
selected temperature. Isotherms were calculated using
MHR based on the histograms collected during the sim-
ulations. Three representative isotherms are plotted in
FIG. 2. Some of the data points calculated directly from
GCMC simulations but not included in the MHR cal-
culation are also plotted in the figure to compare with
isotherms from MHR. It can be seen that the difference
between the densities obtained from direction GCMC
simulations and those from MHR are small. This serves
as a test of the accuracy of the MHR isotherms.
To present the isotherms obtained at different temper-
atures in a concise and clear fashion, we define a param-
eter as