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Proceedings. Second International Conference on Data and Knowledge Systems for Manufacturing and Engineering

16-18 Oct. 1989

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Displaying Results 1 - 25 of 29
  • Second International Conference on Data and Knowledge Systems for Manufacturing and Engineering (IEEE Cat. No.89CH2806-8)

    Publication Year: 1989
    Request permission for commercial reuse | PDF file iconPDF (81 KB)
    Freely Available from IEEE
  • KRISYS: KBMS support for better CAD systems

    Publication Year: 1989, Page(s):172 - 182
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1020 KB)

    The authors propose a knowledge-base management system based on the integration of database and artificial intelligence technology that provides adequate capabilities for the construction of advanced CAD systems. The approach is evaluated in view of other systems and its suitability is demonstrated by means of some examples from the area of architectural design. Throughout the authors refine their... View full abstract»

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  • A system for creating and manipulating mechanical part models based on PDES

    Publication Year: 1989, Page(s):142 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    The Automated Manufacturing Research Facility of the National Institute of Standards and Technology is moving towards the use of PDES-based definitions for mechanical parts. (PDEs is the emerging product data exchange specification standard). This effort is in conjunction with NIST's designation as the National PDES testbed. Currently, commercial CAD systems do not directly support the use of PDES... View full abstract»

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  • Design for manufacture: a knowledge-based approach

    Publication Year: 1989, Page(s):198 - 205
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    The authors address the development of reasoning mechanism in order to link design and its associated downstream manufacturing requirements. A specific example is presented using the design of aircraft flap components through a computer-based or CAD system which also represents a framework for solving design problems in other domains. This forms the basis of a prototype to enable an evaluation and... View full abstract»

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  • Indexing technical data in a materials database

    Publication Year: 1989, Page(s):12 - 18
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Much of the data used by design engineers lack precision, particularly materials property data which are measured in inexact physical experiments and engineering tests. The indexing of such data needs to suit the various types of proximity searches of interest to an engineer. It is shown that B+-tree performance is best when the data are stored as specific values. A new structure, the i... View full abstract»

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  • Ancestor-controlled submodule inclusion in design databases

    Publication Year: 1989, Page(s):28 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    A paradigm is proposed for representing hierarchically specified design data in CAD database systems where there are to be alternate expansions of hierarchical modules. The paradigm is based on an ancestor-based expansion scheme to control which instances of submodules are to be placed within each instance of a given module, and is formalized in a model called a VDAG. The approach is aimed at redu... View full abstract»

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  • Effects of local autonomy of global concurrency control in heterogeneous distributed database systems

    Publication Year: 1989, Page(s):113 - 120
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A heterogeneous distributed database system (HDDBS) is a system which integrates preexisting database systems to support global applications accessing more than one database. The difficulties and general approaches of global concurrency control in HDDBSs are studied. In particular, the author discusses the difficulties of maintaining global serializability in HDDBSs. The need for new strategies is... View full abstract»

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  • Parametric model: a conceptual framework for geometric modelling databases

    Publication Year: 1989, Page(s):161 - 171
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    To reduce the time and effort involved, a database that supports the reusability of designs while effectively modeling the structure and behavior of engineering components with multiple features is essential. The conceptual model of this database should describe all the information related to an object in an application-independent manner to ensure data sharing and facilitate the implementation of... View full abstract»

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  • An expert system for the selection of a composite material

    Publication Year: 1989, Page(s):140 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    An expert system for composite material selection starting from the user specification was developed. Since a database management system (DBMS) was necessary to manage the amount of information for material and application characterization, a logical interface between the Expert 2 system and the relational database was developed. This configuration allows complete separation between the database p... View full abstract»

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  • A work-in-process tracking system for experimental manufacturing

    Publication Year: 1989, Page(s):190 - 197
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    A work-in-process (WIP) tracking system directs and monitors the flow of product in a factory. The author describes a WIP tracking system that supports the management of complex process plans, ensures that products receive their intended processing, and can be used to determine the actual processing received by finished products. The two major features of the tracker are the representation of proc... View full abstract»

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  • Building and optimizing an expert system for ATP design

    Publication Year: 1989, Page(s):68 - 75
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    A description is presented of an expert system called ADES (ATP design expert system) for the design of automatic train-protection (ATP) systems. (An ATP system is a railway signaling system consisting of a set of logic circuits that control the safe movements of trains within a railway station.) Artificial intelligence techniques proved feasible to address this particular design problem, and ADES... View full abstract»

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  • Integrated material resource planning/scheduling in a time-compressed world

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    Summary form only given. Advanced systems are based on a model of the factory that schedules (and continually reschedules) the use of material, machines and people resources to demands and orders placed on the factory. Rule-based systems are used to route orders to processes in the factory, to select material based on current inventory levels and processing alternative, and to select workstations ... View full abstract»

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  • An integrated tool box for the electrical engineer

    Publication Year: 1989, Page(s):144 - 147
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The authors present concepts for the integration of software components such as CAD systems, document management systems and expert systems into a tool box for the electrical engineer and describe the architecture of such a system for computer-integrated engineering (CIE). The kernel of the tool box is an engineering database system based on an active DBMS for maintaining the logical integrity of ... View full abstract»

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  • An application of entity-relationship data modeling techniques to the automated manufacturing process

    Publication Year: 1989, Page(s):206 - 215
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    An entity-relationship (E-R) model has been developed to generically represent aspects of process information flow in a hierarchical automated manufacturing facility. The facility is expected to be networked and to consist of a global controller, local controllers, etc. and IC processing equipment, organized in a hierarchical fashion. The development of the model is presented through a case study ... View full abstract»

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  • Using a relational database as an index to a distributed object database in engineering design systems

    Publication Year: 1989, Page(s):4 - 11
    Cited by:  Papers (1)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    A description is given of a pragmatic architecture for engineering design systems that divides the databases of those systems into a relational database and an object-oriented database. In the architecture, the relational database is used to find designs in the object database, and the object database is used to support the concurrent editing of designs by multiple users and processes on networks ... View full abstract»

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  • A database implementation for large frame-based systems

    Publication Year: 1989, Page(s):19 - 25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A major requirement of database systems in engineering design and manufacturing applications is support for storage and maintenance of complex objects. Frame-based systems are capable of modeling complex objects. However, many of these systems are implemented in main memory. As the number of objects to be sorted far exceeds the capacity of the main memory of a computer, such an implementation is o... View full abstract»

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  • Database support for engineering CAD and simulation

    Publication Year: 1989, Page(s):38 - 48
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    An integrated database architecture is presented to support the diverse requirements of a CAD environment. The resulting CAD system consists of a design representation database, an existing-design database, and a parts catalog database. The design representation database stores and manages designs currently being developed. The existing-design database and the parts catalog database serve as sugge... View full abstract»

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  • Upgrading a complex object DBMS to full object-orientation: a case study

    Publication Year: 1989, Page(s):122 - 130
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The authors present the example of the DAMASCUS system as an approach to upgrading an existing DBMS with complex objects to support the whole palette of object-oriented features. They show how their current system fits into the overall architecture and which concepts and components have to be added. The resulting DBMS is projected as a data repository for nonstandard applications programmed in obj... View full abstract»

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  • A relational query language interface to a hierarchical database management system

    Publication Year: 1989, Page(s):105 - 112
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The authors present an efficient structured query language (SQL) interface to an IMS hierarchical database management system (DBMS). This interface is a part of DATAPLEX, a heterogeneous distributed database management system that will provide location-transparent access to diverse databases using SQL in the engineering and manufacturing environment. The initial target DBMSs to be interfaced are I... View full abstract»

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  • CRONOS-II: a knowledge-based scheduler for complex manufacturing environments

    Publication Year: 1989, Page(s):76 - 83
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    The authors describe CRONOS-II, a knowledge-based scheduler that can model both technological and temporal constraints needed to represent realistic production plans. This scheduler is able to decompose the execution of elementary tasks into parts. Furthermore, it offers the possibility to control the global quality of the produced schedules. From the technical point of view, it implements a depth... View full abstract»

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  • Implementing a real-time scheduling system for VLSI production

    Publication Year: 1989, Page(s):185 - 186
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Classical scheduling theory has been far from successful in solving practical needs of the factory management. Management objectives are often many, ill-defined and changing. In general, the management is interested in a decision-support tool, facilitating specification of their objectives as they change, so that it can react to a constantly changing shop floor, making short-term and long-term pla... View full abstract»

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  • Geometry-based similarity retrieval of rotational parts

    Publication Year: 1989, Page(s):150 - 160
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    In available retrieval and classification systems, parts are described using attributes comparable to those in traditional database systems. The authors suggest a system for retrieval of parts having geometric similarity which accesses a database system storing the geometric data provided by the CAD system. By maintaining, storing and manipulating the complete geometric information of objects, the... View full abstract»

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  • A data model for engineering design objects

    Publication Year: 1989, Page(s):49 - 58
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    Design objects in CAD applications have versions and participate in the construction of other more complex design objects. The author describes data model aspects of an experimental database system for CAD applications called Pegasus. The model is based on previously published work on extensible and object-oriented database systems. The novel idea of Pegasus is the reconciliation of two subtyping ... View full abstract»

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  • Extending a relational DBMS to support complex objects

    Publication Year: 1989, Page(s):131 - 137
    Cited by:  Papers (1)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The definition and manipulation of complex objects in an extended relational database management system are discussed. Complex object types are defined as relation domains encapsulated within methods written in LISP or C. Objects are structured using the set, array and list constructors concepts. Structured objects are manipulated using built-in functions. For a given application, the database adm... View full abstract»

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  • Diagnosing novel faults

    Publication Year: 1989, Page(s):84 - 93
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Currently available diagnostic expert systems are limited as they cannot address novel situations and faults. Moreover, they cannot recognize such situations, which often lead to an incorrect diagnosis or at best an exhaustive search through their knowledge bases. The CONSOLIDATE system is a hybrid diagnostic system which integrates experiential and causal-model-based knowledge sources, which reta... View full abstract»

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