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Articles by Sun Wei
Total Records ( 4 ) for Sun Wei
  Sun Wei , Ma Tieqiang and Li Tao
  Feature-based method is the focus of heterogeneous CAD model exchange. In order to keep the consistency of design intent in heterogeneous CAD model exchange, a constraint conversion method was proposed. Firstly, Feature transformation ways were given to support the correct conversion of constraint. Secondly, the geometric certificate was improved to identify geometric elements and geometric element is the acting object of constraint. Thirdly, the constraint conversion method on level of feature was proposed corresponding to different types of feature and the global transformation method of constraint during heterogeneous CAD models exchanging. Finally, a transformation case of part model from CATIA to UG shows that the approach proposed above is effective.
  Sun Wei , Ma Qin-yi and Gao Tian-yi
  In this study, an ontology-based system is proposed to solve problems raised in the manufacturing design by expanding traditional development activity with Knowledge Management (KM), a Product Knowledge Model (PKM) and the Intelligent Application System (IAS). The KM helps to management the knowledge in the design process, while the PKM supports to locate proper information and the IAS is responsible for applying the product knowledge among different application systems throughout the product life cycle. The PKM is encoded in OWL to realize semantic match and enhance the performance of organization capability and knowledge sharing. The routine design assistance is developed to reuse the product knowledge based on configuration method generating function satisfied solution rapidly by reasoning the configuration rules represented in SWRL. The information retrieval theory is involved to support manufacturing knowledge sharing. A prototype system of binging machine design is developed to verify the proposed approach, using the semantic web technology, for seamless sharing domain-specific design knowledge among multidisciplinary organizations and intelligent supporting the manufacturing design.
  Sun Wei , Ma Tie-Qiang and Guo Li
  The CAD model retrieval based on shape similarity is the research focus of computer graphics and computer-aided design field. To obtain higher retrieval precision and efficiency, a new CAD model retrieval method based on shape similarity is proposed. The method is divided into two steps. Firstly, breadth-first-search-based spanning tree algorithm is applied to obtain an initial boundary matching between retrieval object and retrieval condition. Secondly, the topology adjacency approximation algorithm is put forward to find the optimal boundary matching based on the initial boundary matching by the cycle and approximation process and the matching result is used to calculate the shape similarity between retrieval object and retrieval condition. In order to calculate the similarity between various types of boundary faces, a new similarity calculation method is present. Finally, a CAD model retrieval system on the platform of UG is developed based on the proposed method. Experimental results show that the proposed method is feasible and effective.
  Sun Wei , Wei Wei , Jing Zhang , Wei Wang , Jinwei Zhao , Junhuai Li , Peiyi Shen , Xiaoyan Yin , Xiangrong Xiao and Jie Hu
  In recent years, with the development of data warehouse and Web technology, more and more attention has been paid to multiple applications of the data in warehouse. However, data quality issue is one of the biggest obstacles to the success using of data warehouse project for many enterprises. So a data audit model is proposed and the relevant methods are studied in the study based on the characteristics of the telecommunications industry. Further, a three data layer audit method, consisted of audit mode data file level, record level and index level, is constructed during Extraction Transformation Loading (ETL) process. It can effectively improve the data quality of data warehouse.
 
 
 
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