论文信息 - SUB-OPTIMALITY IN FREIGHT DISTRIBUTION

SUB-OPTIMALITY IN FREIGHT DISTRIBUTION

Abstract A modification to the transportation problem that takes account of sub-optimality has previously been rarely and incautiously applied. A method of implementing the modification by iteration is outlined that minimizes an appropriate goodness-of-fit statistic. The model is then applied, using this method, to freight flow data in Britain. A freight flow matrix is predicted that is superior to a transportation problem prediction and behavioural and economic implications are derived to demonstrate the insights that the technique can yield.

D. E. Pitfield

[1] Sue Wilson,et al. Statistical notes on the evaluation of calibrated gravity models , 1976 .

[2] Stan Openshaw,et al. An Empirical Study of Some Spatial Interaction Models , 1976 .

[3] G. Hyman. The Calibration of Trip Distribution Models , 1969 .

[4] Ian Williams,et al. A comparison of some calibration techniques for doubly constrained models with an exponential cost function , 1976 .

[5] Ja Black,et al. A STATISTICAL EVALUATION OF THE ACCURACY OF A FAMILY OF GRAVITY MODELS. , 1975 .

[6] David Pitfield,et al. Sub‐optimal decision‐making and the transportation problem , 1978 .

[7] D. Pitfield,et al. Freight Distribution Model Predictions Compared: A Test of Hypotheses , 1978 .

[8] Alan Wilson,et al. SOME RELATIONSHIPS BETWEEN ENTROPY MAXIMIZING MODELS, MATHEMATICAL PROGRAMMING MODELS, AND THEIR DUALS* , 1974 .

[9] S. P. Evans. A relationship between the gravity model for trip distribution and the transportation problem in linear programming , 1973 .

[10] Suzanne P. Evans,et al. DERIVATION AND ANALYSIS OF SOME MODELS FOR COMBINING TRIP DISTRIBUTION AND ASSIGNMENT , 1976 .