This paper proposes a forward concurrent reasoning method for rule-based systems using the defined fuzzy colored Petri nets (FCPN). The major differences between the proposed method and the conventional ones are described as follows. Firstly, weighted inference is taken to realize a more reliable and flexible reasoning manner. Secondly, conformal partitioned matrix theory is utilized to achieve forward concurrent reasoning, improving the inference efficiency. Moreover, tokens are not removed while the enabled transitions are fired, meeting the practical cases. The aforementioned aspects are also the prominent advantages of the proposed approach. A case illustrates that the proposed approach is sound and feasible.

Knowledge representation has been the critical and intractable issues for a knowledge-based system, especially for complex or large systems. This paper proposes a knowledge representation approach for modeling rule-based systems using the defined fuzzy colored Petri nets (FCPN). The main advantages of this approach differ from the conventional ones consist in modeling rule-based systems particularly, realizing smaller model spaces, more compact data structures and fuzzy information processing. For a large or complex rule-based system, the advantages are more evident. An instance demonstrates that the presented approach is feasible and practical.

Aimed to the needs for interoperability and comprehensive integration on fieldbus, On the basis of introducing the characteristics of EDD ( Electronic Device Description)and FDT (Field Device Too1), an integration model based on EDD and FDT is proposed. Through embedding the EDDL (Electronic Device Description Language) interpreter into the device DTM and adding the user interface generator module in the DTM UI (User Interface), when the interpreter parse an EDD file, in terms of contents of the device description the intermediate data structure is generated, and by interacting with the viewbuilder user interfaces are automatically generated, and then the operation for the device with EDD can be implemented. As a consequence, the FDT frame application support both DTM (Device Type Manager) and EDD. Inner logic of the model is clarified, and the implementation of interpreter and user interface is specified in detail. The DTM based on EDD can be easily integrated into existing FDT frame application, attaining a purpose of flexible and wide device integration.

Each field device contains a great deal of automation control information, which is used for different stages of software tools throughout a device's life cycle from the configuration towards operation, maintenance, and asset management. By analyzing functions and structure of software tools throughout a device's life cycle and using object-oriented technology for modeling, this paper establishes a field device integration model with structured organization of user interfaces, data, parameters, services, and events in order to provide understanding of features of field device integration and meet needs of achieving field device integration and device interoperability for software tools. The model can be converted into a corresponding field device description, so the paper presents methods that the field device integration model is applied to the current major device integration technologies in the end.