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| 2. |
- Haoxue, Ma, et al.
(författare)
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Distribution and synchronisation of engineering information using active database technology
- 2005
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Ingår i: Advances in Engineering Software. - : Elsevier BV. - 0965-9978 .- 1873-5339. ; 36:11-12, s. 720-728
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Tidskriftsartikel (refereegranskat)abstract
- Today, work collaboration is normal practice in developing modern products. Engineering collaborative work involves a number of team members that need to share and exchange design ideas while working with engineering analysis tools such as mechanical computer aided engineering systems. This work presents the M-Sync prototype system that uses an active database approach to enable exchange of engineering information among distributed team members in a timely manner. The distributed data is fully accessible by the local member and is automatically synchronised between different places using a database management system that support event-condition-action (ECA) database rules. Only updates introduced at one location are distributed to other locations, thereby minimizing information transfer and enhancing performance. Members working at different locations can therefore work in a peer-to-peer (P2P) manner and interactively manipulate the same set of information at the same time.
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| 3. |
- Haoxue, Ma, et al.
(författare)
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Distribution and synchronisation of engineering information using active database technology
- 2003
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Ingår i: Proceedings of the Seventh International Conference on the Application of Artificial Intelligence to Civil and Structural Engineering. - Stirling : Civil-Comp Press.
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Konferensbidrag (refereegranskat)abstract
- Work collaboration is today normal practice in developing modern products. Engineering collaborative work involve a number of team members that need to share and exchange design ideas working with engineering analysis tools, such as mechanical computer aided engineering systems. This work presents a data mediation approach, using active database technology, which enables exchange of engineering information among distributed team members in a timely manner. The distributed data is automatically synchronised between different places using a database management system that support event-condition-action (ECA) database rules. Only the updates introduced at one location are distributed to the other locations, minimizing the information transfer and enhancing the performance. Members working at different locations can therefore interactively manipulate the same set of information at the same time
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| 4. |
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| 5. |
- Haoxue, Ma
(författare)
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Integration of engineering analysis information in the product development process
- 2002
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Keen competition in modern industry motivates companies to produce better products in shorter lead-time. In addition low cost is another key factor that leads commercial success of a product. In the last decade, rapid development and implementation of computer technologies have had great impact on the product development process. In the engineering area, the widely-used advanced computer-based tools enable engineers to design, analyze, simulate and test products by means of digital prototyping in the early phase of the product development process, and therefore dramatically help companies to produce better products with lower cost in shorter time. In practice, design of a complicate product is a complex work where several computer programs from different domains need to be involved. These programs normally need to combine, exchange, and share relevant product data to each other. For instance, Finite Element Analysis and Computational Fluid Dynamics may use geometrical data from a solid model and loads from a Multibody System to perform structural analysis and fluid analysis. The integration of engineering information becomes a more and more important issue in the product development process. However it is difficult to perfectly realize it due to some of the characteristics of engineering information: Heterogeneity. Programs use their own formats (domain specific or application specific) to store information and run on different operating systems and hardware. Distribution. With the development of computer network technology, a trend of engineering information systems has evolved from central systems towards distributed systems. Both data and computer programs are distributed and dynamic. This thesis deals with integration of engineering analysis information in the product development process. The research question is formulated as: How to integrate, share and exchange engineering analysis information in the product development process? The aim is to improve the ability and efficiency of integrating engineering analysis information by using modern database technology as well as other relevant technologies. A prototyping system consisting of a Mechanical Computer Aided Engineering (MCAE) system and an active mediating Database Management System (DBMS) is built. In this system the DBMS is embedded within the MCAE system, meaning that engineering applications not only gain general database capabilities such as storage management, uniform data model, query language and query processing, but also the possibility of combining data from different representations and data sources. In addition, this work presents an active database approach to enable exchange of engineering information among distributed team members in a timely manner. The distributed information is automatically synchronized between different places using database ECA rule and mediation. Only the changes are distributed to other places, which minimise the information transfer and enhance the performance. Members working at different locations can therefore interactively manipulate the same set of information at the same time.
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| 6. |
- Haoxue, Ma, et al.
(författare)
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Integration of multibody system analysis information based on database technology
- 2002
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Ingår i: Proceedings of the Third International Conference on Engineering Computational Technology. - Stirling : Civil-Comp Press. - 0948749849 ; , s. 123-124
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Konferensbidrag (refereegranskat)abstract
- Computer-based tools and methods have become important means of design, simulation and manufacturing in the product development process. Today, many companies function as global enterprises where practically all work is distributed and coordinated worldwide. Consequently large amounts of heterogeneous and distributed engineering data are produced. Furthermore, Computer-based analysis activities within different analysis domains normally need to combine, exchange, and share relevant product data to each other. Product development thus requires product information to be communicated between computer-based tools in such a globally distributed and heterogeneous computing environment. This paper presents how modem database technology can be used to facilitate the integration of product data, specifically information concerning multibody system (MBS) analysis. Through the examples provided, this paper shows how to use multi-database facilities to integrate MBS data between different engineering analysis tools through network; How to access MBS data by using a CORBA-based client-server model. Furthermore, it shows how to use database query language to pose queries to retrieve MBS information that is stored in the embedded database.
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| 7. |
- Isaksson, Ola, et al.
(författare)
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Trends in product modelling : an ENDREA perspective
- 2000
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Ingår i: Proceedings / Produktmodeller 2000. - Linköping : Linköping universitet.
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Konferensbidrag (refereegranskat)abstract
- The success of engineering companies is highly dependent on how well product information is managed, engineered and communicated. From marketing through development to after sales activities, data needs to be accessible and used in the best way. Today, geographical distance, the need for close co-operation and data complexity are all natural parts of the working environment. Product modelling techniques are continuously evolving with new requirements and opportunities emerging daily. This paper will outline and discuss some of these trends, and at the same time present some of the areas where research is being carried out within projects in the Product Model Cluster in the national graduate school - The Swedish Engineering Design Research and Education Agenda (ENDREA).
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| 8. |
- Ma, Haoxue
(författare)
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Integration and communication of engineering information in collaborative design
- 2004
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In recent years, the rapid development of computer technologies has greatly impacted the product development process. In the engineering area, powerful computer-based tools such as Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM) systems enable engineers to fulfil various design tasks and realise product concepts in the early phase of the product development process, without physical parts actually being manufactured. However, the increasing complexity of modern products and the globalization of product development further necessitate a distributed and collaborative design environment where different computer programs and distributed experts in similar or different domains need to be collaboratively involved on a common design activity. Therefore, the integration and communication of engineering information are, amongst others, two of the most critical technical factors in ensuring successful collaboration. This thesis investigates the requirements of collaborative design and develops methods to facilitate the integration and communication of engineering information between engineering information systems in such a distributed and heterogeneous collaborative design environment. A key enabling technology in this thesis is object-relational database technology supporting an object-oriented data model and an object-oriented query language. It is found that modern database technologies not only provide direct support in effectively storing and efficiently accessing CAD data having complex structures, but also assist collaborative design activities by offering advanced database features such as a high level declarative query language, active rules, database wrapper-mediators, and peer database architecture. These features can meet the critical requirements of engineering collaborative design in terms of the integration and communication of engineering information and the interaction between distributed designers. Modern database technology has been extensively used in the thesis and is expected to play an important role in future collaborative design environments. In addition, this thesis employed CORBA – an industry standard for distributed object computing, as a key mechanism to provide object interoperability between CAD systems. Therefore, remote CAD objects and their functionalities are transparently accessed, operated, and distributed through CORBA-based interface across different platforms. It is found that functionalities of traditional, stand-alone, single-user CAD system can be extended by employing modern database technologies and distributed object computing. These technologies provide cornerstone and effective support in building scalable, extensible, easy-to-maintain, and interactive information systems supporting collaborative design, as illustrated in the demonstration systems developed in the present thesis.
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