GGiIŚ AGH

Gość

,[link widoczny dla zalogowanych]
STEP-based mechanical CAD feature information theory modeling

Has the following functions: (1) query entity query is its basic function,[link widoczny dla zalogowanych], press the entity name, query results display, can also be exported file. (2) modify the modification is to modify some property values, the modified system to modify the contents of the corresponding check the syntax and lexical reference to the relationship between multi-STEP file exists. Modified special care to prevent inconsistencies in the information. (3) STEP neutral file after the reconstruction, as amended,[link widoczny dla zalogowanych], to save the results, you can rebuild the STEP file for other systems sharing. (4) SDAI interface,[link widoczny dla zalogowanych], the application of a STEP-based data model must have a standard definition method (EXPRESS description of methods) and the corresponding standard data access interface (SDAI). SADI to the application of a unified data access environment for the development of any application regardless of the underlying data structure, so that application development easy. (5) application program interface (API) layer provides c language program in the library, so that other systems through the c function, the design of application programming interfaces, direct access to the STEP neutral file. 3.2 The design of STEP Application Protocol ZCAP standards implementation in a particular area. Applications must be provided and referenced STEP resources,[link widoczny dla zalogowanych], which need to develop application protocols. An application protocol should include the application scope, functional requirements related to environment and application protocol design is mainly based on three models of research and development, that is. Application activity model, application reference model and the application interpreted model. Application activity model (AAM) define the applications and generation of product data used within the activities, with the IDEF0 said. Application Reference Model (ARM) describes the various activities in support of applications and information between the information required for the structure, usually EXPRESS, IDEFIx said. Application Interpreted Model (AIM) on the integration of resources through the choices and constraints to meet the information given in the reference model requirements. With EXPRESS said. EXPRESS product data model is described in the conceptual model, is a large-scale information modeling language. It not only can be read by. Can also be computer negligent release. EXPRESS language, or an object-oriented language, its basic components are entities and attributes. Coupled with a sub-class of super-class information on succession, making EXPRESS language to describe the real world with complex data structures and relationships of the objects. 3 Caichang Tao et al: Principles of STEP-based mechanical CAD Modeling 1333.3ZCAP feature information and examples of the implementation of methods developed ZCAP is zc-CAD application protocol. Is a 10303AP214 subset of ISO, which uses EX. PRESS language to describe the part feature information model. ZC-GAD sub-module according to ZCAP extracted from the part solid model, matching part geometry and feature information, the establishment of part feature model and mapping rules generated and output in accordance with STEP neutral file, cAJPP / cAM under this agreement for STEP neutral file post-processed to extract information on their respective parts of zero to develop processing technology to achieve cAI) / CAM initial integration. ZCAP including bad degree mode (ZC-tolerance-schema), geometric topology model (ZC-geometry-topology-schema) and shape of mode (zc-form-feature-schema) of three parts, describing the part accuracy are defined, geometric topology , shape features and other information entity class. Asked by the reference entity relationship building part feature information model. Characteristic pattern in the shape defined in part shape feature information is used to describe the entity class. Citing some of the other modes entity. SCHEMAZC-form-feature-schema; REFERENCEFROMZC-geometry-topology-schema; REFERENCEFROMZC-. topleranee-. schoma; shape feature is the physical entity class Processing characteristics (process-feature-in-solid), general characteristics (general-feature), over-type feature (transition-feature), distribution of class features (replicate-feature) in the abstract superclass . ENTITYform-featureABSTRACTSUPERTYPEOFONEOF (process-.fea

相关的主题文章：

[link widoczny dla zalogowanych]

ugg milano Use of ceramic membrane microfiltration

[link widoczny dla zalogowanych]