Results 11 to 20 of about 6,545,298 (346)
Converting Relational Databases into Object-relational Databases. [PDF]
The Journal of Object Technology, 2010 This paper proposes an approach for migrating existing Relational DataBases (RDBs) into Object-Relational DataBases (ORDBs). The approach is superior to existing proposals as it can generate not only the target schema but also the data instances. The solution takes an existing RDB as input, enriches its metadata representation with required semantics ...
Maatuk, Abdelsalam +2 more
openaire +1 more source
RAT-SQL: Relation-Aware Schema Encoding and Linking for Text-to-SQL Parsers [PDF]
Annual Meeting of the Association for Computational Linguistics, 2019 When translating natural language questions into SQL queries to answer questions from a database, contemporary semantic parsing models struggle to generalize to unseen database schemas.
Bailin Wang +4 more
semanticscholar +1 more source
Research and Implementation of Document-Relational Data Query Execution Tech-nology
Jisuanji kexue yu tansuo, 2020 With the arrival of the era of big data, Internet applications have produced abundant data types. Integ-rating storage, query and organization of data with various structures is a research hotspot of large data management system.
MA Zhicheng, YUAN Haifeng, GU Yang, LIU Yaru, ZHANG Xiao
doaj +1 more source
Computing the inverse of cardinal direction relations between regions
Journal of Intelligent Systems, 2022 The inversion of directions is an important operation with directions which plays an important role in qualitative spatial reasoning and spatial queries. In this work, we address on the inversion operation of the basic cardinal direction relations in the
Wang Miao +5 more
doaj +1 more source
Representation and Reasoning for Model of 3DR46 in Complex 3D Space
Jisuanji kexue yu tansuo, 2020 To remedy the deficiency of the existing methods on 3D direction relations, the 3DR46 direction relations model is proposed. The model can represent and distinguish 246 complex 3D direction relations. To process the dynamic of 3D direction relations, the
HAO Xiaohong, LI Song, HAO Zhongxiao
doaj +1 more source
Fatigue database of additively manufactured alloys
Scientific Data, 2023 Fatigue is a process of mechanical degradation that is usually assessed based on empirical rules and experimental data obtained from standardized tests.
Zian Zhang, Zhiping Xu
semanticscholar +1 more source
Uniform Reliability of Self-Join-Free Conjunctive Queries [PDF]
Logical Methods in Computer Science, 2022 The reliability of a Boolean Conjunctive Query (CQ) over a tuple-independent probabilistic database is the probability that the CQ is satisfied when the tuples of the database are sampled one by one, independently, with their associated probability.
Antoine Amarilli, Benny Kimelfeld
doaj +1 more source
Journal of Cancer Research and Clinical Oncology, 2022 Background Cuproptosis induced by FDX1 is a newly discovered mechanism regulating cell death. However, the role of FDX1 in the pathogenesis of colon adenocarcinoma (COAD) remains to be studied.
Lizong Wang +3 more
semanticscholar +1 more source
COVID-19 in Relation to Hyperglycemia and Diabetes Mellitus
Frontiers in Cardiovascular Medicine, 2021 Coronavirus disease 2019 (COVID-19), triggered by the severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2), may lead to extrapulmonary manifestations like diabetes mellitus (DM) and hyperglycemia, both predicting a poor prognosis and an increased
H. Al-kuraishy +5 more
semanticscholar +1 more source
A multi-set extended relational algebra: a formal approach to a practical issue [PDF]
, 1993 The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples an a relation. Many database languages and systems do require multi-set semantics though, either because of functional requirements or because of the high costs
de By, R.A. +2 more
core +4 more sources