An Approach using Multicriteria Decision Methods to Barges Configuration for Pushed Convoys in the Amazon

Abstract

The Amazon region has the largest hydrographic basin in the world and a favorable geographical location as a strategic export point but does not satisfactorily exploit its potential for transport and cargo flow, mainly as a differential factor of logistic competitiveness. For the waterway mode, cargo transportation is predominantly carried out by pushed convoys. The objective of this research is to evaluate and select, the best river train for the outflow of iron ore on the Marabá – Vila do Conde stretch, through a multiple criteria decision-making approach. To meet the objectives, a methodological framework is proposed using a hybrid AHP-DEMATEL method, based on a statistical analysis and to guarantee the reliability of the results for the proposed alternatives and not only considering the preference function, the ELECTRE method was used and also a parametric comparison of the AHP results. The main goals of this work were achieved and it was possible to infer that the combination of these methods has, in addition to the evident efficacy, a high reliability in the water transport area, being able to be used with accuracy of diverse forms in the academic area, as well as in industrial applications. Therefore, it can be affirmed that the best-pushed convoy configuration for the iron ore runoff in the Marabá – Vila do Conde stretch is composed by six barges in the arrangement of two columns and three rows with the measurements, by barge, with length of 60.96[Formula: see text]m; beam of 13.75[Formula: see text]m; and a 5[Formula: see text]m molded depth.

Combustion analysis of ternary mixtures of diesel oil, biodiesel, and refined soybean oil: a view of cylinder pressure

“…Concomitantly to this, according to Almeida, Andrade, and Santos (2018), Brazil is a country mainly agricultural and has a vast amount of fertile land and a climate conducive to the cultivation of different oil crops, data from Teixeira and Neto (2018) and Lameira et al (2020) state that, in 2017, Brazilian soy production reached historical records, and in 2018 it reached 107 million tons, with most of this product having the purpose of export and making the country considered the second-largest producer of grain on the planet, with a share of more than 18% of world production.…”

“…Thus, soy oil appears as a viable option for the fuels used today, since Brazil is the second-largest producer of grain in the world (Teixeira & Neto, 2018;Lameira, Filgueiras, Botter, & Santos Saavedra, 2020) at a cost relatively low, and according to Faleiro and Andrade (2009) and Menegatti and Barros (2007), the product can be genetically adapted for planting in any region of the country, even in areas poorly adapted to cultivation, causing logistical problems, for example, are minimized.…”

Comparative study for naval repairs using longitudinal slipway or airbags

“…In this context, the shipyards located in the Amazon region stand out for their privileged position. The Amazon basin patents the largest basin in the world, drained by a river and its tributaries, discharging about one-fifth of the global freshwater supply annually (Kunert et al, 2017;Lameira, Filgueiras, Botter, & Saavedra, 2020;Wohl, 2007). Thus, Amazonian navigation is strategic not only for its efficiency but also for the effective and natural availability that the region delivers.…”