Algorithm 1: Three-Point Rational Function Interpolation for Calibrating Gravity Models

Autor:	I N Williams, Referee R S Baxter
Rok vydání:	1977
Předmět:	Gravity (chemistry) Mathematical model Fortran Subroutine Geography Planning and Development Rational function Environmental Science (miscellaneous) Gravity model of trade Point (geometry) Algorithm computer Interpolation Mathematics computer.programming_language
Zdroj:	Environment and Planning A: Economy and Space. 9:215-221
ISSN:	1472-3409 0308-518X
DOI:	10.1068/a090215
Popis:	The purpose of this subroutine is to calibrate singly or doubly constrained gravity models by adjusting the impedance parameter beta using a three-point rational function to ensure that the observed and model mean trip costs are within a prespecified level of accuracy. The procedure adopted is outlined with a brief discussion of the underlying theory. /TRRL/
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::20547c563206953e8059a8609f5be09b https://doi.org/10.1068/a090215 Zobrazit plný text záznamu