Bibliometric analysis workflow diagram template

flowchart TB
    A[Define topic and time span] --> B[Build the search strategy]
    B --> C[Search the database]
    C --> D[Export records]
    D --> E{Meets inclusion criteria}
    E -->|No| F[Remove duplicates and irrelevant records]
    E -->|Yes| G[Clean and standardize data]
    subgraph M1[Performance analysis]
        direction LR
        H1[Publications per year] --- H2[Authors and institutions] --- H3[Journals and citations]
    end
    subgraph M2[Science mapping]
        direction LR
        I1[Keyword co-occurrence] --- I2[Clustering] --- I3[Burst terms and timeline]
    end
    G --> M1
    G --> M2
    M1 --> J[Research hotspots and trends]
    M2 --> J
    J --> K[Synthesis and future directions]

Draw a bibliometric analysis workflow diagram with Mermaid flowchart TB syntax. Define the topic and time span, build the search strategy, search the database and export records. Records that do not meet inclusion criteria are removed; the rest are cleaned and standardized. Then use two parallel subgraphs with items joined by plain lines: Performance analysis with publications per year, authors and institutions, journals and citations; and Science mapping with keyword co-occurrence, clustering, burst terms and timeline. Both lead to research hotspots and trends, then synthesis and future directions. Do not use parentheses in node text. Output only the mermaid code block.