'Minimal cover' diaporamas de présentation

Binary Recursion Tree

Binary Recursion Tree. The recursive Shannon expansion corresponds to a binary recursion tree Example: Path ?(v) to node v corresponds to cube c ?(v) Example: c ?(v) = x 1 x 2 x 3. x. x 1. 1. 0. 1. 0. y. x 2. y. 0. 1. 0. 1. 0. 1. ?(v). x 3. 1. 0. v.

1.11k views • 54 slides

Functional Dependencies

498 views • 35 slides

Schema Refinement: Canonical/minimal Covers

489 views • 33 slides

H.-J.Mathony IEEE Proceedings 1989

360 views • 30 slides

706 views • 25 slides

Automatic Subspace Clustering Of High Dimensional Data For Data Mining Application

Automatic Subspace Clustering Of High Dimensional Data For Data Mining Application. Author ? Rakesh Agrawal Johannes Gehrke Dimitrios Gunopulos Prabhakar Raghavan. Schedule. (1).Introduction (2).Motivation

607 views • 25 slides

Schema Refinement and Normalization

414 views • 22 slides

Normalization DB Tuning

Normalization DB Tuning. CS186 Final Review Session. Plan. Functional Dependencies, Rules of Inference Candidate Keys Normal forms (BCNF/3NF) Decomposition BCNF Lossless Dependency preserving 3NF + Minimal cover. Functional Dependencies.

331 views • 20 slides

Normalization DB Tuning

Normalization DB Tuning. CS186 Final Review Session. Plan. Functional Dependencies, Rules of Inference Candidate Keys Normal forms (BCNF/3NF) Decomposition BCNF Lossless Dependency preserving 3NF + Minimal cover DB Tuning. Functional Dependencies.

295 views • 18 slides

Karnaugh Maps

Karnaugh Maps. ELEC 311 Digital Logic and Circuits Dr. Ron Hayne Images Courtesy of Cengage Learning. Terminology. Minterm Implicant Cover Prime Implicant Essential Prime Implicant Secondary Prime Implicant Minimal Sum. Methodology. Minimal Sum Essential Prime Implicants

272 views • 6 slides

Algorithm : Decomposition into 3NF

Algorithm : Decomposition into 3NF. Obviously, the algorithm for lossless join decomp into BCNF can be used to obtain a lossless join decomp into 3NF (typically, can stop earlier). But how to ensure dependency preservation? Idea 1: If X Y is not preserved, add relation XY.

348 views • 6 slides