Titlebook: Nested Relations and Complex Objects in Databases; S. Abiteboul,P. C. Fischer,H. -J. Schek Conference proceedings 1989 Springer-Verlag Ber

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reperfusion

A data model for complex objects based on a semantic database model and nested relations,This paper presents an overview of a data model for complex objects called EXTREM (EXTended RElational Model). EXTREM is based on the semantic database model IFO [AbH.EXTREM is compared with other semantic database models. The EXTREM object algebra and user interfaces are briefly summarized.

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hedonic

艱苦地移動(dòng)

Fima Klebaner,Robert Liptserurrent development of science and technology challenges the scientific community to provide innovative engineering solutions and encourages undertaking research on optimal solutions for mechatronic systems which include, inter alia, wheeled mobile robots and robotic manipulators. The issues relating

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res noch eine glühende Masse bildet, w?hrend das ?u?ere zu einer festen Schale, der ?Erdrinde“, geworden ist. Sie ist aus silikatischem Gesteinsmaterial (in erster Linie Silikatverbindungen der Leichtmetalle) zusammengesetzt und besitzt eine mittlere Dichte von 2,7. Ihre Dicke ist erstaunlich gering