Figure 5
A Sankey diagram of journals (left), author's keywords (middle), and institutions (right). The diagram features three main sections: journals on the left, keywords in the middle, and institutions on the right. Each section is connected by lines that represent the flow or relationship between them. The journals section includes titles such as environment development and sustainability, journal of manufacturing technology management, and ocean and coastal management. The keywords section includes terms like sustainability, supply chain, performance, model, innovation, environmental, optimization, green, machine learning, renewable energy, energy, sustainable development, management, energy efficiency, efficiency, analysis, port, digitalization, smart port, and hydrogen. The lines connecting these sections vary in thickness, indicating the strength or quantity of the relationships.Sankey diagram of journals (left), author's keywords (middle) and institutions (right)