In response to the difficulty in acquiring green design knowledge, designer profile matching, and the low efficiency knowledge recommendation throughout the lifecycle design of electromechanical products, various features involved in the designers' green design processes over the full lifecycle, including type, operational, knowledge, and task features, were identified. Then, feature quantization, weight optimization, and dimensionality reduction fusion were conducted. Subsequently, indicator functions for green design knowledge matching, including designer dynamic profile similarity, lifecycle feature distance, and knowledge greenness, were developed, and a corresponding matching model was constructed. Furthermore, a green design knowledge push mechanism was proposed based on the transfer prediction of designer profile, and an active green design knowledge recommendation method driven by full-lifecycle distance prediction and verification was established. Finally, an application validation was conducted using a new refrigerator model with green design requirements in terms of high volume efficiency, reduced material consumption, and low energy use. The results demonstrate that the recommended green design knowledge sets may effectively support designers in achieving green structural optimization and energy-efficient design for electromechanical products.
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