Emergence of correlation in domain knowledge based on frequency evolution Evolution of Specialization with Reachable Transaction Scope Based on a Simple and Symmetric Firm Resource Allocation Model Crossing the Growth Threshold:Service-Based Economy,Knowledge Process and Reshaping of Efficiency Model Parallel-Data-Based Social Evolution Modeling Knowledge Graph Embedding for Hyper-Relational Data The evolution analysis of agricultural global value chains The connotation, structure and description model of knowledge unit Evolution of Technology Content in China’s Exports and International Comparison An Attribute-Based Encryption Scheme Based on Unrecognizable Trapdoors Types and description rules of knowledge elements about methods in academic papers