Barkers

The sum of the squared differences between calculated and measures pressures is minimized as a function of model parameters. This method, often called Barker s method (Barker, 1953), ignores information contained in vapor-phase mole fraction measurements such information is normally only used for consistency tests, as discussed by Van Ness et al. (1973). Nevertheless, when high-quality experimental data are available. Barker s method often gives excellent results (Abbott and Van Ness, 1975). 

When there is significant random error in all the variables, as in this example, the maximum-likelihood method can lead to better parameter estimates than those obtained by other methods. When Barker s method was used to estimate the van Laar parameters for the acetone-methanol system from these data, it was estimated that = 0.960 and A j = 0.633, compared with A 2 0.857 and A2- = 0.681 using the method of maximum likelihood. Barker s method uses only the P-T-x data and assumes that the T and x measurements are error free. 

Barker J and Henderson D 1967 Perturbation theory and equation of state for a fluids II. A successful theory of liquids J. Chem. Phys. 47 4714... 

Barker J A and Henderson D 1976 What is a liquid Understanding the states of matter Rev. Mod. Phys. 48 587... 

Barker J R (ed) 1995 Progress and Problems in Atmospherio Chemistry (Advanoed Series in Physioal Chemistry) vol 3 (Singapore World Scientific)... 

Barker J A and Auerbach D J 1985 Gas-surface interactions and dynamics thermai energy atomic and moiecuiar beam studies Surf. Sci.Rep. 4 1... 

Barker J A and Rettner C T 1992 Accurate potentiai energy surface for Xe/Pt(111) a benchmark gas-surface interaction potentiai J. Chem. Phys. 97 5844... 

Meagher J F, Chao K J, Barker J R and Rabinovitch B S 1974 Intramolecular vibrational energy relaxation. Decomposition of a series of chemically activated fluoroalkyl cyclopropanes J. Phys. Chem. 78 2535 3... 

Barker J R 1984 Direct measurement of energy transfer in rotating large molecules in the electronic ground state J. Chem. Phys. 88 11... 

Miller L A and Barker J R 1996 Collisional deactivation of highly vibrationally excited pyrazine J. Chem. Phys. 105 1383-91... 

Barker A L, Gonsalves M, Maepherson J V, Slevin C J and Unwin P R 1999 Scanning electrochemical microscopy beyond the solid/liquid interface Anal. Chim. Acta 385 223... 

Barker J A and Watts R O 1973 Monte Carlo studies of the dielectric properties of water-like models Mol. Phys. 26 789-92... 

Hoover W G, Ross M, Johnson K W, Henderson D, Barker J A and Brown B C 1970 Soft sphere equation of state J. Chem. Phys. 52 4931-41... 

Flynn G W and Weston R E Jr 1995 Glimpses of a meohanism for quenohing unimoleoular reaotions a quantum state resolved pioture Advances in Chemicai Kinetics and Dynamics vol 2B, ed J Barker (Greenwioh, CT JAI Press) pp 359-91... 

Comparison of the Lennard-]ones potential for argon with the Barker-Fisher-Watts pair potential kg is .mann s constant. 

A comparison of the pairwise contribution to the Barker-Fisher-Watts potential with the Lennard-Jones potential for argon is shown in Figure 4.38. 

J. A. Barker, Lattice Theories of the Liquid State Pergamon, New York (1963). 

Barker, J. and Ando, D.J., Mass Spectrometry Analytical Chemistry by Open Learning, Wiley, Chichester, U.K., 1999. 

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