Entropy-Based Patent Valuation: Decoding "Costly Signals" in the Food Industry via a Robust Entropy-TOPSIS Framework.

As shown in Figure 6 , the Enrichment Factor displays a decreasing trend as the cutoff increases, which is characteristic of an effective ranking system that prioritizes the most valuable assets at the very top.

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Notably, Examination Duration also displays a highly significant positive correlation with award status.

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Third, traditional sectors exhibited a clear trend of “Refined Upgrading.” Clusters such as “Dairy Deep Processing,” “Meat Preservation & Processing,” and “Utilization of Tea Resources” demonstrate that traditional food processing is evolving from simple manufacturing to technology-intensive deep processing, characterizing innovations in component separation, texture modulation, and waste resource utilization.

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