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Knowledge-Based Modeling for Computer-Integrated Manufacturing
Published in Ulrich Rembold, Robot Technology and Applications, 2020
The upper levels of abstraction hide the detailed techniques and miscellaneous auxiliary operations used. For example, a high level CAD model hides its realization principle (e.g., wire model, constructive solid geometry model, or convolution areas). Only the topology, form, and size need to be represented at the highest level. A similar example is the operation sequence of robots as already mentioned. Sometimes the highest level of a model is called the conceptual schema (database technology). To be integrated, a model must be separated into two parts. For the solution of each CIM problem, all local and isolated models (e.g., different turnkey systems) are converted into a neutral and universal representation (conceptional schema). The advantage of local integration is the ability of the various isolated models to communicate with one another. In principle, this local integration is possible at different higher levels. A good CIM application demands that the highest possible integration level be used.
OO-Method
Published in Roger H.L. Chiang, Keng Siau, Bill C. Hardgrave, Systems Analysis and Design, 2017
Oscar Pastor, Juan Carlos Molina, Emilio Iborra
In this context, two very remarkable features in the OO-Method are introduced below: A precise set of conceptual primitives is provided by the method, in accordance with its formal basis. Since a subset of UML diagrams is used as the corresponding basic representation blocks, an adequate and efficient use of this well-known standard is proposed, which avoids the problem of overspecification that occurs when having to use the hundreds of modeling elements provided by the UML notation as a whole.On the other hand, every conceptual construct introduced in the model has its corresponding software counterpart when projected in the software product representation through a process of model transformation. In this way, every piece of information contained in the conceptual schema is meaningful and has a precise semantic justification: to describe a specific part of the problem domain so that it is properly converted into a software representation at the solution space (depending on the particular target software technology).
Smartphone-based parking guidance algorithm and implementation
Published in Journal of Intelligent Transportation Systems, 2021
Hongyan Gao, Qian Yun, Rundong Ran, Jun Ma
The databases of parking guidance system include traffic information database, parking management database, map database, etc. Generally, the database design process consists of four phases: requirements elicitation, conceptual schema design, logical schema design, and physical schema design. This paper only presents the database design process for parking management.