Database Repairs and Analyti Tableaux

Analytic Tableaux and Database Repairs: Foundations

Using Data Mining and Three Decision Tree Algorithms to Optimize the Repair and Maintenance Process

The purpose of this research is to predict the failure of devices using a data mining tool. For this purpose, at the outset, an appropriate database consists of 392 records of ongoing failures in a pharmaceutical company in 1394, in the next step, by analyzing 9 characteristics and type of failure as a database class, analyzes have been used. In this regard, three decision tree algorithms have ...

Reconstructing Repairs of Census Data Forms as Database Repairs

In the context of consistent query answering (CQA) from inconsistent databases, the notion of repair is fundamental. A repair is a new database instance that minimally differs from the original, inconsistent database, but does satisfy the integrity constraints. Minimality usually refers to a minimal set of tuples on which the two instances differ. In this paper we reexamine the process of corre...

The View-Update Problem for Indefinite Databases

This paper introduces and studies a declarative framework for updating views over indefinite databases. An indefinite database is a database with null values that are represented, following the standard database approach, by a single null constant. The paper formalizes views over such databases as indefinite deductive databases, and defines for them several classes of database repairs that real...

Modeling and Availability Analysis of Internet Data Center with various Maintenance Policies

In this paper, the authors have focused on the stochastic analysis of an internet data center (IDC), which consists of a database main server connected to a redundant server. Observing the different possibilities of functioning of the system, analysis has been done to evaluate the various reliability characteristics of the system. The system can completely fail due to failure of redundant serve...