Titlebook: MFDBS 89; 2nd Symposium on Mat János Demetrovics,Bernhard Thalheim Conference proceedings 1989 Springer-Verlag Berlin Heidelberg 1989 Daten

CLAY

Multiple task selection protocol in a distributed problem solving network,lving network. These functions are used to specify the Multiple Task Selection Protocol which dynamically selects the most competent group of nodes for solving a problem and improves the problem solving capability of the network by making use of previous experience.

JECT

Cumbersome

Selective refutation of integrity constraints in deductive databases, framework rather than providing convincing elements with respect to the advantages of the method. In order to get such an evidence examples that give rise to a more complex search spaces are needed..Much work has to be done to extend the approach to normal programs even if we foresee less advantages.

Pastry

外形

APNEA

An extended view on data base conceptual design,f Discourse?" by giving specific methods and algorithms. Some new operational concepts are introduced and studied: identifiers, identifier equivalence, special subuniverses, the relationship "A is genus proximus of B".

无法治愈

lactic

Restructuring and dependencies in databases,pendencies that generalize the functional ones are introduced. For these dependencies a sound and complete inference system D is constructed. Moreover, from the system D and the mapping ϕ a sound and complete inference system for the triple (ℜ, ϕ, .) is obtained.

不合

百科全书

A strategy for executing complex queries, is used; it allows us to maintain a join index, i.e. an index which permits to compute a join without operating on tuples coming from the two operand relations in it. The join index we propose can be used also when computing selections; we will show how it permits to perform operations on sets of pointers efficiently.