摘要:

Abstract:This paper describes a plan‐based framework that can be configured for design in different domains. The case for design by planning is argued by examining the requirements of an adequate framework for design and showing how the planning approach satisfies the requirements. Using the plan‐based framework, the knowledge requirements of design, design transformations, multiagent design, learning, and creativity are explored. Multiagent design can be realized through delegated planning; and learning, through the chunking of successful design plans into summary plan operators. Routine design is shown to be equivalent to the reuse of stored design plans as summary plan operators; innovative design, to the combination and modification of previous plans; and creative design, to the automatic creation of new plan operators from domain axioms. An example of the conceptual/preliminary design of a light industrial building performed by a prototype plan‐based system is desc

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00278.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY

摘要:

Abstract:The development of automated design assistants requires a generic framework in which design knowledge can be directly represented and utilized. The framework should be transparent, allowing a user to view and query the system's reasoning and to control its solution processes. Current knowledge‐based systems techniques have failed to provide such a framework because their inference procedures do not directly support design transformations. This paper describes the design and implementation of a generic framework for design based on planning. Issues addressed include the representation and use of strategic control knowledge, object‐level design knowledge, normative knowledge, and general knowledge within a planning framework. Examples of the functioning of the framework in the design of beams to satisfy lateral torsional buckling requirements are presented. The efficiency and limitations of the implementation are discussed and possible extensions to the system descri

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00279.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY

摘要:

Abstract:This paper presents an example of a knowledge‐based system application in the domain of building design, specifically for construction‐site management. This type of system is a reasonable approach for providing a design aid to engineers. The object‐oriented representation that is the base of the prototype GRAM_V2 was developed by the authors from an analysis of the specific needs for a building computer‐aided design (CAD) system. This hybrid language integrates several functionalities such as multiple representation, delegation, and a set of graphic classes. The system architecture promotes adaptability, ease of use, and evolution of the system over time. GRAM_V2 utilizes AUTOCAD as a graphic interface and an object‐oriented language developed in LISP. This paper emphasizes the formalism and explains the utility of the different functionalities of GRAM_V2 through this specific ap

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00280.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY

摘要:

Abstract:A consistent representation of offshore structures and barges that is appropriate for computer processing is essential for the development of an efficient design system for offshore heavy lift installation. This paper outlines the representation of conceptual and physical entities in the preliminary design for lift installation through an object‐oriented approach. The spatial and topologic abstractions of physical entities are illustrated. These abstractions, together with the locational dependency concept for an assembly, form the backbone for geometric reasoning in the top‐down approach for lift installation design. An object‐oriented prototype system for lift evaluation, C‐LIFT, using the knowledge‐based development tool kit ART*Enterprise is described. A liftability study involving the installation of offshore modules and the associated lift sequence is then presented to illustrate the advantages of this

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00281.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY

摘要:

Abstract:This paper demonstrates a mechanism for incorporating and independently evaluating membership functions and certainty factors during the preprocessing phrase in fuzzy expert systems. By providing this flexibility within the framework of a fuzzy expert system tool, the expert system becomes better equipped to model real‐world control application

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00282.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY

摘要:

Abstract:The need for construction automation instruction in the civil engineering curriculum is reviewed. A mobile robot suitable for use as a laboratory teaching device was developed. Obstacle sensing and avoidance were performed using ultrasonic sensors and a fuzzy logic controller. Experiences of the students who developed the robot are discussed. It is concluded that a class project provides valuable hands‐on experience that reinforces the students' understanding of theory. A background on microcontrollers is provide

ISSN:1093-9687    

DOI:10.1111/j.1467-8667.1995.tb00283.x

出版商:Blackwell Publishing Ltd    

年代:1995

数据来源: WILEY