Titlebook: Database and Expert Systems Applications; 4th International Co Vladimír Mařík,Jiří Lažanský,Roland R. Wagner Conference proceedings 1993 Sp

委托

浅滩

–LOUS

978-3-540-57234-3Springer-Verlag Berlin Heidelberg 1993

generic

阐明

Semantic relativism in conceptual modeling,85], [POK89]), [POK90]) as a basic modeling construct is used. The presented results show how to deal exactly with so called semantic relativism, i.e how to express that two different semantic database models have the same expressive power. We show that it is easy to reach the property for many of well-known semantic database models.

GRE

,Information handling — A challenge for databases and expert systems,techniques to embed expert system functionality into each single step of the process of information handling. An integrated prototype, which is currently under development at GMD-IPSI, will be outlined at the end of this paper.

血统

Predict query processing cost in a distributed database system,different configurations based on experiments on a very limited number of configurations. Our experimental results indicate that the proposed methodology fairly accurately predicts the performances of new configurations.

耐寒

On temporal-fuzziness in temporal Fuzzy databases, can provide upper bounded, lower bounded, and approximate answers to queries. Then, the Temporal Fuzzy Data Model and a metadatabase are proposed. The concept of metadatabase allows the time-variant property of fuzzy meanings to be modeled. Since based on the relational model, our model has a unifo

细胞学

失误

Some problems of cardiac energeticstechniques to embed expert system functionality into each single step of the process of information handling. An integrated prototype, which is currently under development at GMD-IPSI, will be outlined at the end of this paper.