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In product design process, Cost reduction is a complex solution procedure based on knowledge reasoning. Scientific knowledge representation is the basis of the logical consequence. Begin with expatiating the components and characteristic of the whole lifecycle cost of mechanical product, this paper analyses the characteristic of cost reduction knowledge, on which basis, it presents the frame knowledge...
Knowledge engineering (KE) is playing an important part in product development field. With the development of artificial intelligence, the knowledge engineering is developing fast too. This paper made a comparison of different conception of knowledge engineering and knowledge based engineering (KBE), and studied on the application situation of KE and KBE. The main content of KE is also studied to...
The paper introduces ontology into knowledge construction of petroleum exploitation domain in order to solve problems on information sharing and application integrating which are caused by the inconsistence of information terms between disciplines. Through the formal description of ontology, this paper puts forward an improved method of ontology mapping, designs an ontology integration platform of...
Based on the knowledge rule models and the analysis mathematical models, the two-level real-time expert control system (ECS) was established. With the self-learning ability in expert optimal mode, the expert system (ES) was developed to find the calcining zone's optimal temperature value. To optimize the process, the real-time control system (RTCS) was designed to realize the control of the feeding...
Integration and adding intelligence are essential objectives in development and application of information systems. An old wish of engineers is to have a highly integrated system for the handling of all necessary information during the entire lifecycle of an industrial product. Development of modeling and simulation based product lifecycle management (PLM) systems grounded the realization of such...
Open source tools for Knowledge Representation in databases and the implementation of a real time expert system for mineral processing operations (size reduction and enrichment) are discussed. The use of a column-oriented database system (Infobright IEE) to store quantitative data from sensors that measure feed size distribution, feed rate, aeration rate, pulp density, pH and temperature allows low...
By the combination of feature and concept hierarchy model and the definition of innovation about concept, the method of structured processing and knowledge hierarchical representation for injection mould repair schemes is put forward under the condition of non-fuzzy or fuzzy data. Rule sets can be provided by knowledge induction for injection mould repairs based on basic rough set, but the rule sets...
Modern product development needs a large number of knowledge contained at all stages of product life cycle. In order to deal with the discrete, heterogeneous expression, scenario dependence of various types of product knowledge, a context-driven knowledge-sharing approach is presented, covering product knowledge modeling, describing and organizing. Through building product knowledge context model,...
Discusses the research contents and features of Industrial Design and Extenics at first. Based on the extensional theories of matter element, the color imformaton of product design has been defined, and the color molecule model has been built. By describing the color design knowledge and its attribute with the form of extensional matter element, the color knowledge representation model for industrial...
Multi-agent systems have proven to be a powerful technology for improving flexibility and agility in a complex manufacturing environment. In such systems, an ontology is a crucial element for knowledge representation of the external environment or the agent's domain of application as well as for ensuring interoperability between agents. The agent's decision component uses this world representation...
This paper introduces connectionistic concept grid (CCG), which is used for representation and reasoning of engineering knowledge applied for the industrial systems. The paper also presents the Crossword tool which was used for computer aided modelling and execution of CCG. CCG is able to provide semantic descriptions of objects and processes and was developed to overcome limitations of earlier knowledge...
Creative endeavors “design work” are necessary to make up machinery products. The expert who has knowledge, experience, and knowhow plays an important role to continuing enterprises. Especially in recent years, the considerations on design business in manufacturing are remarkably increasing on articles such as globalization, environmental problems and new technologies, etc. How to improve the intellectual...
Be aimed at the issue how to make full use of the existing product resources to respond rapidly the users' requirements, one rapid intelligent design approach is presented. This approach combines case based reasoning with modular technology and focuses on the following researches: the modeling approach of product model, the relation-driven among model parammeters, the case variant modification technology...
Representation and reasoning mechanism are the core and basis of the expert system. A good design of the knowledge representation and reasoning mechanism is very important. It will have a direct impact on the performance of expert system. In this paper, an expert system for prevention and control on stored grain pests is constructed base on frame knowledge presentation and case-based reasoning.
The project in petrochemical industry is complex and risky. For this feature, we established a safety risk assessment (SRA) expert system based on fault tree in petrochemical industry. In this paper, we studied the design and implementation of infer engine in SRA expert system. we adopted the method of fault tree analysis (FTA) to acquire expert knowledge and the fault tree established is to be the...
As an onsite problem for enterprises, some design support systems had been imported for problem oriented design to improve the automation of design business which is usually corresponded by modifying the drawings using general-purposed CAD systems. The systems are good to support drawings but not effective to support processing the design knowledge onsite. To improve the intellectual productivity...
In studying the safety risk assessment expert system in petrochemical industry, the conception of fault tree based on binary decision diagrams (BDD) is proposed for fault tree analysis. Taking the boiler fouling explosion for example, the fault tree model and BDD model are built. On the basis of the fault tree model and BDD model, the stress is put on the knowledge representation (KR) of BDD based...
In the process of product intelligent design, product model usually should be established. Generally speaking a complete product model contained a group of attributes, however, in many cases, each attribute needed to be distributed appropriate weight. In this paper the method of extracting attribute sets of product model using product cases was proposed based on attribute reduction in rough set theory,...
Knowledge representation (KR) is critical to establish effective knowledge-based systems (KBSs) and closely linked with knowledge reasoning and the extension of a KBS. At the same time, KR is the bottleneck that all knowledge engineers face, especially in representing complex domain knowledge. This paper proposes a new approach based on unified modeling language (UML) which takes knowledge as a process...
The knowledge delivery is an important process that enables enterprises to create competitive business advantages. In view of the existing insufficiency of knowledge management system, this paper proposed a frame of proactive knowledge service system for product design, sketch the frame of proactive knowledge service system and show some details. Illustrate method of knowledge representation for product...
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