Search results for " algorithms"

showing 10 items of 612 documents

Magnetic resonance cholangiopancreatography

2002

With the introduction of endoscopic retrograde cholangio-pancreatography in the early 1970s, gastroenterologists have a lot of diagnostic options in the biliopancreatic system to their disposal. Meanwhile, magnetic resonance cholangiopancreatography (MRCP) has become a competitive replacement for diagnostic ERCP with the advantage of avoiding complications related to endoscopic techniques. Mounting evidence suggests that both MRCP and MRI (magnetic resonance imaging) have a profound influence of diagnostic algorithms in a variety of hepatobiliary and pancreatic diseases.

medicine.medical_specialtyMagnetic resonance cholangiopancreatographyHepatologymedicine.diagnostic_testbusiness.industryEndocrinology Diabetes and MetabolismGastroenterologymedicineMagnetic resonance imagingDiagnostic algorithmsRadiologybusinessPancreatology
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Sistema inteligente para protocolizar el diagnóstico de invasión ganglionar en el cáncer de laringe

2002

Laryngeal carcinoma is the most frequent malignant tumour in head and neck. Node invasion is known to be one of the most important prognostic factors. The aim of this study has been to design an intelligent system to perform a diagnostic algorithm of metastasic neck nodes. 122 clinical reports of patients diagnosed of laryngeal carcinoma in our department have been reviewed. The compiled data have been: tumor site, T stage, N stage (clinical, after CT scan and post-surgery). The method used to design the intelligent system has been the ID3, which is able to generate a minimal decision tree. Palpation has been the variable that has given more information about node invasion. CT has proved to…

medicine.medical_specialtymedicine.diagnostic_testbusiness.industryDiagnostic testComputed tomographyDiagnostic algorithmsmedicine.diseasePalpationTumor siteSurgeryOtorhinolaryngologymedicineCarcinomaT-stageRadiologyHead and neckbusinessActa Otorrinolaringológica Española
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A method of reconstruction after pancreaticoduodenectomy for pancreatic malignancies in very young children: Two cases reports

2016

Abstract Pancreatic tumors are very rare diseases in very young children. Most information about those diseases in children was published in cases reports. Due to the rare nature of pancreatic tumors in children, there remains the absence of diagnostic algorithms, clear radiographic and morphological assessments as well as evidence based best treatment options. Because of the young age of patients and the rare occurrence of pancreatic neoplasms, tumor detection remains poor. For malignancies affecting the head of the pancreas the only possibility for achieving clear surgical margins is performing a pancreaticoduodenectomy (PD). We describe two cases of diagnostic and treatment of pancreatic…

medicine.medical_specialtymedicine.medical_treatmentlcsh:SurgeryYoung childrenPancreaticoduodenectomy03 medical and health sciencesPancreatic tumor0302 clinical medicinePancreatic tumormedicinePancreatic tumors; Pancreaticoduodenectomy; Young children; Pediatrics Perinatology and Child Health; SurgeryPancreatic tumorsbusiness.industryGeneral surgerySettore MED/20 - Chirurgia Pediatrica E Infantilelcsh:RJ1-570Treatment optionslcsh:PediatricsDiagnostic algorithmslcsh:RD1-811medicine.diseasePancreaticoduodenectomySettore MED/18 - Chirurgia GeneraleYoung ageTumor detection030220 oncology & carcinogenesisPediatrics Perinatology and Child Health030211 gastroenterology & hepatologySurgerybusinessJournal of Pediatric Surgery Case Reports
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Parallel global optimization : structuring populations in differential evolution

2010

metaheuristicsoptimointistagnaatioglobal optimizationalgoritmitdifferentiaali evoluutioevoluutiolaskentaDifferential EvolutionEvolutionary computationevolutionary algorithmsmatemaattinen optimointiglobaali optimointitietojenkäsittely
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ON-LINE CONSTRUCTION OF A SMALL AUTOMATON FOR A FINITE SET OF WORDS

2012

In this paper we describe a "light" algorithm for the on-line construction of a small automaton recognising a finite set of words. The algorithm runs in linear time. We carried out good experimental results on real dictionaries, on biological sequences and on the sets of suffixes (resp. factors) of a set of words that shows how our automaton is near to the minimal one. For the suffixes of a text, we propose a modified construction that leads to an even smaller automaton. We moreover construct linear algorithms for the insertion and deletion of a word in a finite set, directly from the constructed automaton.

minimal automata[INFO.INFO-DS]Computer Science [cs]/Data Structures and Algorithms [cs.DS]Timed automatondeterministic automataBüchi automaton0102 computer and information sciences02 engineering and technology01 natural sciencesDeterministic automaton0202 electrical engineering electronic engineering information engineeringComputer Science (miscellaneous)Two-way deterministic finite automatonNondeterministic finite automatonMathematicsonline construction.Discrete mathematicsSettore INF/01 - InformaticaPowerset constructionPushdown automatonComputer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing)010201 computation theory & mathematicsProbabilistic automaton020201 artificial intelligence & image processingFinite set of wordAlgorithmComputer Science::Formal Languages and Automata Theory
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Recursion at the crossroads of sequence modeling, random trees, stochastic algorithms and martingales

2013

This monograph synthesizes several studies spanning from dynamical systems in the statistical analysis of sequences, to analysis of algorithms in random trees and discrete stochastic processes. These works find applications in various fields ranging from biological sequences to linear regression models, branching processes, through functional statistics and estimates of risk indicators for insurances. All the established results use, in one way or another, the recursive property of the structure under study, by highlighting invariants such as martingales, which are at the heart of this monograph, as tools as well as objects of study.

modèles auto-régressifs[MATH.MATH-PR] Mathematics [math]/Probability [math.PR]estimation and prediction errorstochastic gradient algorithmschaîne de Markov à mémoire variable[STAT.TH] Statistics [stat]/Statistics Theory [stat.TH]Digital search treesvariable length Markov chainstrong laws for discrete martingalessuffix trietemps d'occurrences de motifsoptimisation stochastique.dynamical systemtrie des suffixesstochastic optimization.erreur d'estimation et de prédictionArbres digitaux de rechercheauto-regressive modelssystème dynamiquelois fortes de martingales discrètesalgorithmes de gradient stochastiques[MATH.MATH-ST] Mathematics [math]/Statistics [math.ST]occurrences time
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Design and implementation of the AMIGA embedded system for data acquisition

2021

The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and admin-istrative staff in Malargtie. We are very grateful to the following agencies and organizations for financial support: Comision Nacional de Energla Atomica, Agencia Nacional de Promocion Cientffica y Tec-nologica (ANPCyT) , Consejo Nacional de Investigaciones Cientfficas y Tecnicas (CONICET) , Gobierno de la Provincia de Mendoza, Municipalidad de Malargtie, NDM Holdings and Valle Las Leilas, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho…

muon: showersDetector control systems (detector and experiment monitoring and slow-control systems architecture hardware algorithms databases)Physics::Instrumentation and Detectorsdata acquisitionAstronomycosmic radiation: electromagnetic componentengineeringprimary [cosmic radiation]Particle detectors01 natural sciencesenergy: thresholdData acquisition concepthardwareInstrumentationMathematical Physicsshowers [muon]media_commonHigh Energy Astrophysical Phenomena (astro-ph.HE)astro-ph.HEControl and monitor systems onlinePhysicsSettore FIS/01 - Fisica SperimentaleAstrophysics::Instrumentation and Methods for Astrophysicsthreshold [energy]16. Peace & justiceAugerelectromagnetic component [cosmic radiation]observatoryDetector control systems (detector andexperiment monitoring and slow-control systemslanguageupgradeAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical Phenomenadatabases)atmosphere [showers]Land accessarchitectureEuropean communityairAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesalgorithmsPolitical science0103 physical sciencesmedia_common.cataloged_instanceddc:530High Energy Physics[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]ddc:610Control and monitor systems online; Data acquisition concepts; Detector control systems (detector and experiment monitoring and slow-control systems architecture hardware algorithms databases); Particle detectorsEuropean union010306 general physicsInstrumentation and Methods for Astrophysics (astro-ph.IM)Ciencias Exactasscintillation countershowers: atmosphere010308 nuclear & particles physicsDetector control systems (detector and experiment monitoring and slow-control systemsData acquisition conceptsFísicastabilitylanguage.human_languagecosmic radiation: primarymonitoringResearch councilExperimental High Energy PhysicsHigh Energy Physics::ExperimentControl and monitor systems on-linePortuguese[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]HumanitiesRAIOS CÓSMICOSastro-ph.IM
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A Navigation and Augmented Reality System for Visually Impaired People

2021

In recent years, we have assisted with an impressive advance in augmented reality systems and computer vision algorithms, based on image processing and artificial intelligence. Thanks to these technologies, mainstream smartphones are able to estimate their own motion in 3D space with high accuracy. In this paper, we exploit such technologies to support the autonomous mobility of people with visual disabilities, identifying pre-defined virtual paths and providing context information, reducing the distance between the digital and real worlds. In particular, we present ARIANNA+, an extension of ARIANNA, a system explicitly designed for visually impaired people for indoor and outdoor localizati…

navigation; visually impaired; computer vision; augmented reality; cultural context; convolutional neural network; machine learning; hapticExploitComputer scienceconvolutional neural networkImage processingContext (language use)02 engineering and technologyTP1-1185BiochemistryConvolutional neural networkArticleMotion (physics)computer visionAnalytical ChemistrySettore ING-INF/04 - AutomaticaArtificial IntelligenceHuman–computer interactioncultural context0202 electrical engineering electronic engineering information engineeringHumansElectrical and Electronic EngineeringnavigationInstrumentationHaptic technologySettore ING-INF/03 - TelecomunicazioniChemical technology020206 networking & telecommunicationsAtomic and Molecular Physics and Opticsaugmented realitymachine learning020201 artificial intelligence & image processingAugmented realityvisually impairedNeural Networks ComputerhapticAlgorithmsVisually Impaired PersonsPATH (variable)augmented reality computer vision convolutional neural network cultural context haptic machine learning navigation visually impaired Algorithms Artificial Intelligence Humans Neural Networks Computer Augmented Reality Visually Impaired PersonsSensors
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Simple memetic computing structures for global optimization

2014

optimointidifferentiaalievoluutiomemetic computingdifferential evolutionlocal searchmemeettiset algoritmitgeneettiset algoritmitmemetic algorithmsevolutionary algorithmsmemetic structures
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Increasing stability in the linearized inverse Schrödinger potential problem with power type nonlinearities

2022

We consider increasing stability in the inverse Schr\"{o}dinger potential problem with power type nonlinearities at a large wavenumber. Two linearization approaches, with respect to small boundary data and small potential function, are proposed and their performance on the inverse Schr\"{o}dinger potential problem is investigated. It can be observed that higher order linearization for small boundary data can provide an increasing stability for an arbitrary power type nonlinearity term if the wavenumber is chosen large. Meanwhile, linearization with respect to the potential function leads to increasing stability for a quadratic nonlinearity term, which highlights the advantage of nonlinearit…

osittaisdifferentiaaliyhtälötincreasing stabilityreconstruction algorithmsApplied Mathematicspower type nonlinearitiesinversio-ongelmatComputer Science ApplicationsTheoretical Computer ScienceMathematics - Analysis of PDEsSignal ProcessingFOS: Mathematicsinverse Schrödinger potential problemMathematical PhysicsAnalysis of PDEs (math.AP)
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