Relational decompositions

Understanding the tectonic mechanism generated by the earthquakes and faults is possible only if the preseismic, coseismic and postseismic crustal deformation related to the earthquakes is determined properly. By the analysis of continuous GPS (CGPS) coordinate time series, it is possible to estimate the crustal deformation. Besides, accelerometer records at strong motion stations (SMSs) may support the CGPS-based estimates.

18p tanmocphong 29-01-2022 17 2   Download

This paper aims at highlighting the inequality aversion of the Cameroonian social planer. This is allowed by the multilevel (α, β) - decomposition of the α - Gini which integrate in its functional form a parameter of inequality aversion of the decision maker being related either to within-group inequality (α) or between-group inequality (β).

8p guineverehuynh 18-06-2020 8 1   Download

Bài giảng "Thương mại điện tử - Lecture 8: Thiết kế Data Model - WEB TMDT" trình bày các nội dung: Thiết kế dự án web - Project Design; mô hình dữ liệu Data Model, Entity-Relation Diagram, mô hình qui trình - Process Model, Functional Decomposition Diagram. Mời các bạn cùng tham khảo.

17p bautroibinhyen13 10-01-2017 61 6   Download

Chapter 11 present the contents: Designing a set of relations, properties of relational decompositions, algorithms for relational database schema, multivalued dependencies and fourth normal form, join dependencies and fifth normal form, inclusion dependencies, other dependencies and normal forms.

43p kiepnaybinhyen_04 15-12-2015 51 2   Download

Relation Decomposition and Insufficiency of Normal Forms (cont.): Attribute preservation condition: Each attribute in R will appear in at least one relation schema Ri in the decomposition so that no attributes are “lost”. Another goal of decomposition is to have each individual relation Ri in the decomposition D be in BCNF or 3NF. Additional properties of decomposition are needed to prevent from generating spurious tuples

66p thienthanoze 12-11-2012 69 5   Download

Introduction: The chemical warfare agents well known count only about 30 kinds of compounds, such as sarin, soman, tabun, VX, mustard gas, lewisite and others. When unknown toxic substances should be analyzed upon the occurrence of chemical terrorism, much more kinds of poisons and related compounds become the objects of analysis. In the Chemical Weapons Convention (CWC)a, 120 thousand compoundsb, including typical chemical warfare agents, their related compounds, precursors and decomposition products, are being listed to be controlled.

22p bigbaby87 01-09-2010 111 17   Download