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171.
DR-Prolog: A System for Defeasible Reasoning with Rules and Ontologies on the Semantic Web 总被引:1,自引:0,他引:1
Grigoris Antoniou Antonis Bikakis 《Knowledge and Data Engineering, IEEE Transactions on》2007,19(2):233-245
Nonmonotonic rule systems are expected to play an important role in the layered development of the semantic Web. Defeasible reasoning is a direction in nonmonotonic reasoning that is based on the use of rules that may be defeated by other rules. It is a simple, but often more efficient approach than other nonmonotonic rule systems for reasoning with incomplete and inconsistent information. This paper reports on the implementation of a system for defeasible reasoning on the Web. The system 1) is syntactically compatible with RuleML, 2) features strict and defeasible rules, priorities, and two kinds of negation, 3) is based on a translation to logic programming with declarative semantics, 4) is flexible and adaptable to different intuitions within defeasible reasoning, and 5) can reason with rules, RDF, RDF Schema, and (parts of) OWL ontologies 相似文献
172.
Under the effects of high shear rate and confinement between solid surfaces, the behavior of a thin lubricant film deviates
from that of the bulk, resulting in significant increases of lubricant viscosity and interfacial slip. A semi-empirical model
accounting for the breakdown of continuum theory at the nanoscale is proposed—based on film morphology and chemistry from
available experimental and molecular dynamics simulation data—to describe lubricant behavior under shear. Viscosity stiffening
and interfacial slip models are introduced into the formulations of the normal (bearing) and shear forces acting on a sphere
that moves within a thin lubricant film parallel to a rigid plane. The experimentally measured ‘apparent’ viscosity confounding
the effects of both stiffening and slip is used to predict the hydrodynamic forces acting on a fully or partially submerged
sphere for the purposes of describing lubricant contact in magnetic storage. The proposed sphere-on-flat model forms the basis
of a future, dynamic contact with friction model that will account for lubricant contact in the context of molecularly thin
lubricated rough surface contact. 相似文献
173.
174.
The sliding contact between two rough surfaces in the presence of a molecularly thin lubricant layer is investigated. Under
very high shear rates, the lubricant is treated as a semi-solid layer with normal and lateral shear-dependent stiffness components
obtained from experimental data. The adhesive force in the presence of lubricant is also adapted from the Sub-boundary lubrication
model and improved to account for variation in surface energy with penetration into the lubricant layer. A model is then proposed,
based on the Improved sub-boundary lubrication model, which accounts for lubricant contact and adhesion and its validity is
discussed. The model is in good agreement with published experimental measurements of friction in the presence of molecularly
thin lubricant layers and suggests that a molecularly thin lubricant bearing could be successfully used to reduce solid substrate
damage at the interface. 相似文献
175.
T. de Oliveira Marcela Bakas Alexandros Frimpong Eugene Groot Adrien E. D. Marquering Henk A. Michalas Antonis Olabarriaga Silvia D. 《电信纪事》2020,75(3-4):103-119
Annals of Telecommunications - In emergency care, fast and efficient treatment is vital. The availability of Electronic Medical Records (EMR) allows healthcare professionals to access a... 相似文献