Results 1 - 10 of 74

How to generate query parameters in RDF benchmarks?

by Andrey Gubichev, Renzo Angles, Peter Boncz
"... Abstract—In this paper we consider the problem of generating parameters for queries in RDF benchmarks. We show that uniform random sampling of the substitution parameters is not well suited for RDF benchmarks, since it results in unpredictable runtime behavior of queries. We formulate a formal probl ..."
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Abstract—In this paper we consider the problem of generating parameters for queries in RDF benchmarks. We show that uniform random sampling of the substitution parameters is not well suited for RDF benchmarks, since it results in unpredictable runtime behavior of queries. We formulate a formal

RDF Analysis of Small-Signal Equivalent Circuit Parameters in MOSFET Devices

by L. Oniciuc, P. Andrei
"... A perturbation technique is developed for the analysis of random doping induced fluctuations (RDF) of small-signal equivalent circuit parameters in semiconductor devices. This technique is based on the computation of the doping sensitivity functions of parameters of interest by using the admittance ..."
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A perturbation technique is developed for the analysis of random doping induced fluctuations (RDF) of small-signal equivalent circuit parameters in semiconductor devices. This technique is based on the computation of the doping sensitivity functions of parameters of interest by using the admittance

Minimising RDF Graphs under Rules and Constraints Revisited

by Reinhard Pichler, Axel Polleres, Sebastian Skritek, Stefan Woltran , 2010
"... Based on practical observations on rule-based inference on RDF data, we study the problem of redundancy elimination in RDF in the presence of rules (in the form of Datalog rules) and constraints (in the form of so-called tuple-generating dependencies). To this end, we investigate the influence of ..."
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Based on practical observations on rule-based inference on RDF data, we study the problem of redundancy elimination in RDF in the presence of rules (in the form of Datalog rules) and constraints (in the form of so-called tuple-generating dependencies). To this end, we investigate the influence

Hybrid Acquisition of Temporal Scopes for RDF Data

by Anisa Rula, Matteo Palmonari, Axel-cyrille Ngonga Ngomo, Jens Lehmann
"... Abstract. Information on the temporal interval of validity for facts de-scribed by RDF triples plays an important role in a large number of ap-plications. Yet, most of the knowledge bases available on the Web of Data do not provide such information in an explicit manner. In this paper, we present a ..."
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Abstract. Information on the temporal interval of validity for facts de-scribed by RDF triples plays an important role in a large number of ap-plications. Yet, most of the knowledge bases available on the Web of Data do not provide such information in an explicit manner. In this paper, we present a

Redundancy Elimination on RDF Graphs in the Presence of Rules, Constraints, and Queries

by Reinhard Pichler, Axel Polleres, Sebastian Skritek, Stefan Woltran
"... Based on practical observations on rule-based inference on RDF data, we study the problem of redundancy elimination on RDF graphs in the presence of rules (in the form of Datalog rules) and constraints, (in the form of so-called tuple-generating dependencies), and with respect to queries (ranging ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
Based on practical observations on rule-based inference on RDF data, we study the problem of redundancy elimination on RDF graphs in the presence of rules (in the form of Datalog rules) and constraints, (in the form of so-called tuple-generating dependencies), and with respect to queries (ranging

Graph Summaries for Optimizing Graph Pattern Queries on RDF Databases

by Angela Maduko, Kemafor Anyanwu, Amit Sheth, John Miller, Paul Schliekelman
"... Abstract. The adoption of the Resource Description Framework (RDF) as a metadata and semantic data representation standard is spurring the development of high-level mechanisms for storing and querying RDF data. A common approach for managing and querying RDF data is to build on Relational/Object Rel ..."
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Abstract. The adoption of the Resource Description Framework (RDF) as a metadata and semantic data representation standard is spurring the development of high-level mechanisms for storing and querying RDF data. A common approach for managing and querying RDF data is to build on Relational

Adaptive Control of Hydraulic Systems with MML Inferred RDF Networks

by Daniel F. Schmidt, Andrew P. Paplinski, Gordon S. Lowe - In 2005 IEEE International Conference on Robotics and Automation, 2005. April 18 - 22 , 2005
"... Abstract—In this paper the problem of adaptively controlling a hydraulic system with uncertainties is considered. An adaptive controller is derived to control actuator force with unknown valve flow coefficients and fluid parameters. This is subsequently cascaded into a position controller which uses ..."
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Abstract—In this paper the problem of adaptively controlling a hydraulic system with uncertainties is considered. An adaptive controller is derived to control actuator force with unknown valve flow coefficients and fluid parameters. This is subsequently cascaded into a position controller which

Parameter estimates for the Relaxed Dimensional Factorization preconditioner and application to hemodynamics

by Michele Benzia, Simone Deparisb, Gwenol Gr, Alfio Quarteronib
"... We present new results on the Relaxed Dimensional Factorization (RDF) preconditioner for solving saddle point problems from incompressible flow simulations, first introduced in [1]. This method contains a parameter α> 0, to be chosen by the user. Previous works provided an estimate of α in the 2D ..."
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We present new results on the Relaxed Dimensional Factorization (RDF) preconditioner for solving saddle point problems from incompressible flow simulations, first introduced in [1]. This method contains a parameter α> 0, to be chosen by the user. Previous works provided an estimate of α in the 2

PARAMETER ESTIMATES FOR THE RELAXED DIMENSIONAL FACTORIZATION PRECONDITIONER AND APPLICATION TO HEMODYNAMICS∗

by Michele Benzi, Simone Deparis, Gwenol Gr, Alfio Quarteroni, Michele Benzi, Simone Deparis, Gwenol Grandperrin, Alfio
"... Abstract. We present new results on the Relaxed Dimensional Factorization (RDF) precondi-tioner for solving saddle point problems, first introduced in [5]. This method contains a parameter α> 0, to be chosen by the user. Previous works provided an estimate of α in the 2D case using Local Fourier ..."
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Abstract. We present new results on the Relaxed Dimensional Factorization (RDF) precondi-tioner for solving saddle point problems, first introduced in [5]. This method contains a parameter α> 0, to be chosen by the user. Previous works provided an estimate of α in the 2D case using Local Fourier

Using CDISC ODM and the RDF Data Cube for the Semantic Enrichment of Longitudinal Clinical Trial Data

by Hugo Leroux, Laurent Lefort
"... Abstract. The development of ontology, linked data standards and tools for semantic enrichment, opens new opportunities to analyse and reuse the clinical data collected as part of clinical trials and longitudinal studies. This paper presents our approach on the semantic enrichment of the data collec ..."
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collected as part of the Australian, Imaging, Biomarker and Lifestyle study of Ageing (AIBL). AIBL is a large scale longitudinal clinical study into neurodegenerative diseases that has been designed to support investigations of the predictive utility of various biomarkers, cognitive parameters and lifestyle
Results 1 - 10 of 74