Study on topological characteristics of oil and gas storage and transportation system in port area

Abstract

Complex network theory and topology analysis have been gradually applied in land transportation network research. However, the research on oil and gas storage and transportation in the port area is still blank. Based on the analysis of the operation process of the oil and gas storage and transportation system in the port area, this paper establishes the topological network structure of the oil and gas storage and transportation system for the first time. Through the analysis and calculation of parameters such as node degree, shortest path, and betweenness of nodes in this network, the key node analysis of the oil and gas storage and transportation system is realized.

Route planning for chemical ships that takes into account marine rescue resources

“…On the route planning of dangerous goods vessels, Zhou et al [1] carried out the transport scheme optimization for the West Africa-China route with the objective of minimizing the total cost of transporting cruise ships. Rodrigues, Vincius Picanço [2] , and others considered the timeliness and added the time window constraint to plan the tanker route.…”

“…15)Equation(1) represents the objective function to satisfy the minimum total cost of the chemical ship; equation (2) represents the risk during the navigation segment, which consists of the frequency of bad weather and the traffic accident rate; and equation (3) to equation (6) represent the cost of the chemical ship during the navigation segment. equation(7) to equation (10) represent the degree of rescue within the navigation segment sailed by the chemical ship; equation(8) represents the ship performance of the rescue base; equation (9) represents the coverage of the study area by the rescue base; equation (10) represents the degree of rescue of the study area by the rescue ship; equation (11) to equation (13) indicates a maximum of one pass of the study area per cruise by the chemical vessel; equation (14) indicates that the rescue ship's rescue time must be less than the rescue prime time period; equation (15) indicates the variable constraint that the chemical ship passing through the node is 1, and the opposite is 0.…”