نتایج جستجو برای: a database meta
تعداد نتایج: 13478240 فیلتر نتایج به سال:
We describe a meta-querying system for databases containing queries in addition to ordinary data. In the context of such databases, a meta-query is a query about queries. Representing stored queries in XML, and using the standard XML manipulation language XSLT as a sublanguage, we show that just a few features need to be added to SQL to turn it into a fully-fledged meta-query language. The good...
This paper presents an overview of data mining techniques in the context of of the deductiveinductive cycle model. The claim made in this paper is that a combination of both of these modes of inference in one model o ers adavantages over the exclusive use of either induction or deduction. After an introduction of this model the paper describes an architecture of the Knowledge Miner environment ...
Distributed data mining systems aim to discover and combine useful information that is distributed across multiple databases. One of the main challenges is the design of effective and efficient methods to combine multiple models computed over multiple distributed sources that scale well over many large distributed databases. We describe in detail several methods that evaluate, prune and combine...
We introduce a database platform called ‘RIKEN Meta Database’ that provides information on RIKEN’s various life-science databases to help researchers around the world make full use of RIKEN’s research results. Since RIKEN procures various and large life-sciences datasets through the genomes and phenomes of various species, including datasets for sequence and image data, such resultant research ...
Databases are usually developed independently by each group or organization to meet their own individual requirements. However, as interactions between groups and organizations become increasingly common, many applications end up requiring data not from one single database but from several related databases. Thus, users have to deal with databases whose designs have never been coordinated. Inte...
Background and Aim: Iranian veterans have suffered spinal cord, chemical, psychological, and amputation injuries due to the eight-year war in Iraq, which has necessitated long-term care. Most caregivers are their spouses. In this study, the overall quality of life score of the wives of Iranian veterans has been estimated. Methods: In this systematic review and meta-analysis, the databases of Sc...
We provide a principled extension of SQL, called SchemaSQL , that offers the capability of uniform manipulation of data and meta-data in relational multi-database systems. We develop a precise syntax and semantics of SchemaSQL in a manner that extends traditional SQL syntax and semantics, and demonstrate the following. (1) SchemaSQL retains the flavour of SQL while supporting querying of both d...
INTRODUCTION It is unclear whether using peers can improve adherence to antiretroviral therapy (ART). To construct the World Health Organization's global guidance on adherence interventions, we conducted a systematic review and network meta-analysis to determine the effectiveness of using peers for achieving adequate adherence and viral suppression. METHODS We searched for randomized clinical...
introduction: transforming growth factor-beta 1 (tgf-β1) is a pleiotropic cytokine with potent anti-inflammatory property, which has been considered as an essential risk factor in the inflammatory process of ischemic stroke (is), by involving in the pathophysiological progression of hypertension, atherosclerosis, and lipid metabolisms. -509c/t tgf-β1 gene polymorphism has been found to be assoc...
OBJECTIVE Systematic reviews (SRs) often poorly report key information, thereby diminishing their usefulness. Previous studies evaluated published SRs and determined that they failed to meet explicit criteria or characteristics. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was recommended as a reporting guideline for SR and meta-analysis (MA), but pr...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید