Research On Technology Of Knowledge Modeling And Application For Green Product Design

Green design is an extension of traditional product design; compared to the latter, it has the characteristics of covering a wide range, technical complexity, highly relying on experience and so on, these make it has a more intense demand for design knowledge. However, enterprises have encountered difficulties in the management and application of green design knowledge:①the green design knowledge was difficult to be ordered by the existing knowledge model due to the sources of diversification, variety in types and heterogeneity;②lack of effective knowledge model to support the knowledge identification, acquisition and reuse in green design;③lack of knowledge representation which was suitable for green design;④lack of active knowledge service, the green designers spent a lot of time and energy on knowledge retrieval. To solve them, the technology of green design knowledge modeling and its application are studied. The main contents are as follows:Chapter I described the research background, pointed out that the knowledge needs of green design, reviewed the related status of green product design knowledge. On the basis of literature reviewing, research problems were presented. And finally the main research contents and organizational structure were shown up.Chapter Ⅱ presented the classification of green design knowledge, which was divided into three types:the domain knowledge, design process knowledge and design result knowledge, and analyzed the relationship between them. The multi-dimensional space and content model for the domain knowledge were established; the product lifecycle-oriented green product integration model was built for the design result knowledge.Chapter III analyzed the green product design process, and formalized it in both organizational layer and individual layer using the primitive theory. By doing these, the green design process knowledge was obtained, and the gap between domain knowledge and product model was bridged. Also, the user knowledge structure model and user capability level model were established, and the data acquisition methods and user evaluation were studied.Chapter IV firstly presented domain ontology construction method for green design, and used ontology to represent the models such as domain knowledge model, green product integration model, and design process knowledge. Then, the latent semantic relations in design process were analyzed and expressed. Finally, on the the basis of ontology representation, the reasoning based on Description Logic and rules was studied, and reasoning system architecture integrated SWRL and OWL was given.Chapter Ⅴ established a recommendation system model for green design knowledge on the basis of the knowledge representation and reasoning. The problem of active knowledge service in design process was solved by proposing the rule acquisition technology based on rough sets and the personalized recommendation methods based on rules.Chapter Ⅵ took the green design of an automatic cutting as an example to verify the effectiveness and feasibility of the proposed green design knowledge model. And then the prototype system for green design knowledge management was developed in combination with the actual demands of enterprise.Chapter Ⅶ summarized the results of the study and suggested the possible research directions in the future.