Insight into the Disciplinary Structure of Nanoscience & Nanotechnology Profit Constraint, Ownership Structure and Indigenous Innovation The connotation, structure and description model of knowledge unit Systematic Optimization of China’s Manufacturing Industrial Structure Low-carbon transformation of industriaL structure in china Structure Optimization for Echo State Network Based on Contribution Network structure, portfolio diversification and systemic risk Size structure of urban agglomerations in China:rationality evaluation,patterns, and implications Effect of China's industrial structure adjustment on carbon emissions Human Capital Structure and Economic Growth:From the Perspective of New Structural Economics