Figure 7
A scatter plot visualizes the relationship between the relevance degree (centrality) and development degree (density) of various themes related to smart ports. The x-axis represents the relevance degree, while the y-axis represents the development degree. The plot is divided into four quadrants: Niche Themes, Motor Themes, Basic Themes, and Emerging Themes. Each quadrant contains clusters of themes. The Niche Themes quadrant includes themes such as emissions, energy efficiency, and ports. The Motor Themes quadrant features themes like performance, impact, and innovation. The Basic Themes quadrant contains themes such as sustainability, management, and logistics. The Emerging Themes quadrant includes themes like model, system, efficiency, adsorption, removal, and carbon. The data points are color-coded and shaped differently to represent various themes. The plot shows a few clusters and patterns, indicating the varying degrees of relevance and development of these themes.Keyword thematic map showing smart port by themes