17,620 research outputs found
The relativistic impulse approximation for the exclusive electrodisintegration of the deuteron
The electrodisintegration of the deuteron in the frame of the Bethe-Salpeter
approach with a separable kernel of the nucleon-nucleon interaction is
considered. This conception keeps the covariance of a description of the
process. A comparison of relativistic and nonrelativistic calculations is
presented. The factorization of the cross section of the reaction in the
impulse approximation is obtained by analytical calculations. It is shown that
the photon-neutron interaction plays an important role.Comment: 31 pages, 14 figures, 1 tabl
Parallelization of Logical Inference for Confluent Rule-based System
* This paper was made according to the program № 14 of fundamental scientific research of the Presidium of the
Russian Academy of Sciences, the project 06-I-П14-052The article describes the research aimed at working out a program system for multiprocessor
computers. The system is based on the confluent declarative production system. The article defines some
schemes of parallel logical inference and conditions affecting scheme choice
Cuatro años en las Órcadas del Sur - por José Manuel Moneta - Buenos Aires, Peuser Ltda., 1939.
Fil: Zamorano, Mariano
Domains with Complicated Structures and Their Ontologies
The article defines the class of domains with complicated structures, gives the definition of multilevel
ontologies and determines the method for developing such ontologies
Nocturnal Oximetry-based Evaluation of Habitually Snoring Children
Rationale: The vast majority of children around the world
undergoing adenotonsillectomy for obstructive sleep
apnea–hypopnea syndrome (OSA) are not objectively diagnosed by
nocturnal polysomnography because of access availability and cost
issues. Automated analysis of nocturnal oximetry (nSpO2), which is
readily and globally available, could potentially provide a reliable and
convenient diagnostic approach for pediatric OSA.
Methods: DeidentifiednSpO2 recordings froma total of 4,191 children
originating from13 pediatric sleep laboratories around the worldwere
prospectively evaluated after developing and validating an automated
neural network algorithm using an initial set of single-channel nSpO2
recordings from 589 patients referred for suspected OSA.
Measurements and Main Results: The automatically
estimated apnea–hypopnea index (AHI) showed high
agreement with AHI from conventional polysomnography
(intraclass correlation coefficient, 0.785) when tested in 3,602
additional subjects. Further assessment on the widely used AHI
cutoff points of 1, 5, and 10 events/h revealed an incremental
diagnostic ability (75.2, 81.7, and 90.2% accuracy; 0.788, 0.854, and
0.913 area under the receiver operating characteristic curve,
respectively).
Conclusions: Neural network–based automated analyses of
nSpO2 recordings provide accurate identification of OSA
severity among habitually snoring children with a high pretest
probability of OSA. Thus, nocturnal oximetry may enable a
simple and effective diagnostic alternative to nocturnal
polysomnography, leading to more timely interventions and
potentially improved outcomes.Supported in part by project VA037 U16 from the Consejer´ıa de Educacio´ n de la Junta de Castilla y Leo´ n and the European Regional Development Fund (FEDER), project RTC-2015-3446-1 from the Ministerio de Econom´ıa y Competitividad and FEDER, and project 153/2015 of the Sociedad Espan˜ ola de Neumolog´ıa y Cirug´ıa Tora´ cica (SEPAR). L.K.-G. is supported by NIH grant 1R01HL130984. M.F.P. was supported by a Fellowship Educational grant award from the Kingdom of Saudi Arabia. D.´A. was in receipt of a Juan de la Cierva grant from the Ministerio de Econom´ıa y Competitividad. The funders played no role in the study design, data collection, data analysis, interpretation, and writing of the manuscript
Upgradable Tree Levels Editor of Metaontologies, Ontologies and Knowledge for a Chemistry
* This paper has supported by Far Eastern Branch of the Russian Academy of Sciences, the project 06-III-A-01-005 and
Russian Fund of Fundamental Investigation, the project 06-07-89071-aDevelopment of upgradable tree levels editor of metaontologies, ontologies and knowledge for a
chemistry intellectual system is described. A fragment of chemistry ontology of the third level is given. A dialogue
scenario for editing ontologies of the second level is described. Data base schemes for representing ontologies
and knowledge are defined. A way for adding graphical components to the editor is described
Mathematical Models of Domain Ontologies
* This paper was made according to the program No 14 of fundamental scientific research of the Presidium of the
Russian Academy of Sciences, the project "Intellectual Systems Based on Multilevel Domain Models".In this article the notion of a mathematical model of domain ontology is introduced. The mathematical
apparatus (unenriched logical relationship systems) is essentially used. The representation of various elements of
domain ontology in its model is considered. These elements are terms for situation description and situations
themselves, knowledge and terms for knowledge description, mathematical terms and constructions, auxiliary
terms and ontological agreements. The notion of a domain model is discussed. The notions of a precise ontology
and precise conceptualization are introduced. The structures of situations and knowledge and also their
properties are considered. Merits and demerits of various classes of the domain ontology models are discussed
Kreatywność w memie internetowym
Udostępnienie publikacji Wydawnictwa Uniwersytetu Łódzkiego finansowane w ramach projektu „Doskonałość naukowa kluczem do doskonałości kształcenia”. Projekt realizowany jest ze środków Europejskiego Funduszu Społecznego w ramach Programu Operacyjnego Wiedza Edukacja Rozwój; nr umowy: POWER.03.05.00-00-Z092/17-00
A Memetic Algorithm for Logic Circuit Design
Memetic Algorithms (MAs) have shown to be very effective in solving many hard combinatorial optimization problems. In this perspective, this paper presents a MA for combinational logic circuits synthesis. The proposed MA combines a Genetic Algorithm (GA) for digital circuit design with the gate type local search (GTLS). The combination of a global and a local search is a strategy used by many successful hybrid optimization approaches. The main idea is to apply a local refinement to an Evolutionary Algorithm (EA) in order to improve the fitness of the individuals in the population. The obtained results indicate that the MA reduces the number of generations required to reach the solutions and its standard deviation while improves the final fitness function.N/
Comparison of different orders padé fractional order PD0.5 control algorithm implementations
This paper studies the performance of different order Padé Fractional Order (FO) PD0.5 controllers applied to the leg joint control of a hexapod robot with two dof legs and joint actuators with saturation. For simulation purposes the robot prescribed motion is characterized through several locomotion variables and for the walking performance evaluation are used two indices, one based on the mean absolute density of energy per travelled distance and the other on the hip trajectory errors. A set of simulation experiments reveals the influence of the different order Padé PD0.5 controllers tuning upon the proposed indices.N/
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