Search results for " control."

showing 10 items of 7562 documents

Re: Technique of internal mammary dissection using pectoralis major flap to prevent contour deformities

2009

* Anastomosis Surgical * Constriction Pathologic/prevention & control * Dissection * Esthetics * Female * Humans * Mammaplasty/methods* * Mammary Arteries/surgery* * Pectoralis Muscles/blood supply * Pectoralis Muscles/transplantation* * Postoperative Complications/prevention & control * Regional Blood Flow * Surgical Flaps/blood supply* * Treatment Outcome
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Anthropometric measures of 9-to 10-year-old native tibetan children living at 3700 and 4300m above sea level and han Chinese living at 3700m

2015

A high residential altitude impacts on the growth of children, and it has been suggested that linear growth (height) is more affected than body mass. The aim of the present study was to estimate the prevalence of obesity, overweight, underweight, and stunting in groups of native Tibetan children living at different residential altitudes (3700 vs 4300 m above sea level) and across ancestry (native Tibetan vs Han Chinese children living at the same altitude of 3700 m), as well as to examine the total effect of residential altitude and ancestry with stunting. Two cross-sectional studies of 1207 school children aged 9 to 10 years were conducted in Lhasa in 2005 and Tingri in 2007. Conventional …

*altitude *anthropometry article body height body mass chest circumference child controlled study cross- sectional study diet dietary intake disease association disease severity female Han Chinese human major clinical study male *obesity/ep [Epidemiology] *obesity/et [Etiology] prevalence priority journal school child sex ratio social status *stunting/ep [Epidemiology] *stunting/et [Etiology] Tibetan (people) *underweight/ep [Epidemiology] *underweight/et [Etiology] waist circumference
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Economic Impact of 'Third-Wave' Cognitive Behavioral Therapies:A Systematic Review and Quality Assessment of Economic Evaluations in Randomized Contr…

2018

The term third-wave cognitive behavioral therapy (CBT) encompasses new forms of CBT that both extend and innovate within CBT. Most third-wave therapies have been subject to randomized controlled trials (RCTs) focused on clinical effectiveness; however, the number and quality of economic evaluations in these RCTs has been unknown and may be few. Evidence about efficiency of these therapies may help support decisions on efficient allocation of resources in health policies. The main aim of this study was to systematically review the economic impact of third-wave therapies in the treatment of patients with physical or mental conditions. We conducted a systematic literature search in PubMed, Psy…

*third-wave cognitive behavioral therapiesMindfulnessPsychotherapistBF Psychology*economic evaluationmedicine.medical_treatmentCost-Benefit Analysis*acceptancePsycINFOAcceptance and commitment therapylaw.invention03 medical and health sciencesThird-wave cognitive behavioural therapies0302 clinical medicineRandomized controlled triallawmedicineHumans030212 general & internal medicineEconomic impact analysisRandomized Controlled Trials as TopicHB Economic Theory*systematic reviewCognitive Behavioral Therapythird-wave cognitive behavioral therapiesDialectical behavior therapyEconomic evaluationCognitive behavioral therapyClinical PsychologyAcceptanceCognitive therapySystematic reviewPsychology*mindfulnessMindfulness030217 neurology & neurosurgeryClinical psychology
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Work fluctuations in bosonic Josephson junctions

2016

We calculate the first two moments and full probability distribution of the work performed on a system of bosonic particles in a two-mode Bose-Hubbard Hamiltonian when the self-interaction term is varied instantaneously or with a finite-time ramp. In the instantaneous case, we show how the irreversible work scales differently depending on whether the system is driven to the Josephson or Fock regime of the bosonic Josephson junction. In the finite-time case, we use optimal control techniques to substantially decrease the irreversible work to negligible values. Our analysis can be implemented in present-day experiments with ultracold atoms and we show how to relate the work statistics to that…

---Josephson effectPopulationFOS: Physical sciences01 natural sciencesSettore FIS/03 - Fisica Della Materia010305 fluids & plasmasFock spacesymbols.namesakequant-phUltracold atomQuantum mechanics0103 physical sciences010306 general physicseducationPhysicsCondensed Matter::Quantum GasesQuantum Physicseducation.field_of_studyOptimal controlAtomic and Molecular Physics and OpticsQuantum Gases (cond-mat.quant-gas)symbolsProbability distributionCondensed Matter - Quantum GasesHamiltonian (quantum mechanics)Quantum Physics (quant-ph)cond-mat.quant-gas
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Maximum Torque Per Ampere control algorithm for low saliency ratio interior permanent magnet synchronous motors

2017

This paper presents an investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs). In particular, this study was carried out on a small-power IPMSM with low salience ratio. Both control algorithms have been implemented in the Matlab/Simulink environment, obtaining promising results.

010302 applied physicsControl algorithmMaximum torque per ampere control algorithmPermanent magnet synchronous motorComputer scienceRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesField oriented control algorithmField orientationSalience (neuroscience)Control theoryMagnet0103 physical sciences0202 electrical engineering electronic engineering information engineeringInterior permanent magnet synchronous machineMATLABAmperecomputerMaximum torquecomputer.programming_language
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Sensorless control of induction motors using an extended Kalman filter and linear quadratic tracking

2017

Induction motors are the most commonly used prime-movers in industrial applications. Many induction motors supplied by frequency converters are coupled with a physical angular rotor position/velocity sensor which makes the drive complex and require maintenance. This paper presents a sensorless control structure to avoid using a physical angular rotor position/velocity sensor. The proposed method estimates and control the angular rotor velocity using optimal control theory. The optimal controller used in this paper is based on linear quadratic tracking and the states of the machine are estimated using an extended Kalman filter. Both the controller and the estimator utilize the same internal …

010302 applied physicsEngineeringbusiness.industryRotor (electric)Control engineering02 engineering and technologyConvertersOptimal control01 natural scienceslaw.inventionExtended Kalman filterControl theoryPosition (vector)law0103 physical sciences0202 electrical engineering electronic engineering information engineeringTorque020201 artificial intelligence & image processingbusinessInduction motor2017 20th International Conference on Electrical Machines and Systems (ICEMS)
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State-space formulation of scalar Preisach hysteresis model for rapid computation in time domain

2015

A state-space formulation of classical scalar Preisach model (CSPM) of hysteresis is proposed. The introduced state dynamics and memory interface allow to use the state equation, which is rapid in calculation, instead of the original Preisach equation. The main benefit of the proposed modeling approach is the reduced computational effort which requires only a single integration over the instantaneous line segment in the Preisach plane. Numerical evaluations of the computation time and model accuracy are provided in comparison to the CSPM which is taken as a reference model.

010302 applied physicsMemory interfacePreisach model of hysteresis0209 industrial biotechnologyApplied MathematicsComputationScalar (mathematics)02 engineering and technologySystems and Control (eess.SY)01 natural sciences020901 industrial engineering & automationLine segmentControl theoryModeling and Simulation0103 physical sciencesFOS: Electrical engineering electronic engineering information engineeringApplied mathematicsComputer Science - Systems and ControlTime domainReference modelMathematics
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Framework for complex quantum state generation and coherent control based on on-chip frequency combs

2018

Integrated frequency combs introduce a scalable framework for the generation and manipulation of complex quantum states (including multi-photon and high-dimensional states), using only standard silicon chip and fiber telecommunications components.

010302 applied physicsQuantum opticsPhysicsbusiness.industryFiber (mathematics)Electronic Optical and Magnetic MaterialPhysics::OpticsSettore ING-INF/02 - Campi ElettromagneticiQuantum information processingSettore ING-INF/01 - Elettronica01 natural sciences010309 opticsMechanics of MaterialsCoherent controlQuantum state0103 physical sciencesScalabilitySilicon chipOptoelectronicsCoherent statesbusinessFrontiers in Optics / Laser Science
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Experimental comparison of two control algorithms for low-saliency ratio interior permanent magnet synchronous motors

2018

In this paper, an experimental investigation on the comparison between the Maximum Torque Per Ampere (MTPA) and the Field Orientation Control (FOC) algorithms for interior permanent magnet synchronous machines (IPMSMs) is described, analyzed and discussed. This investigation was carried out on a small-power IPMSM with low saliency ratio. More in detail, after a previous simulation study, the control techniques have been experimentally implemented and validated through means of a dSPACE® rapid prototyping system. The performances of the two algorithms have been evaluated and compared, obtaining interesting results.

010302 applied physicsRapid prototypingControl algorithmElectromagneticsPermanent magnet synchronous motorComputer scienceRenewable Energy Sustainability and the Environment020208 electrical & electronic engineeringlow saliency ratio motor02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesField oriented control algorithmmaximum torque per ampere control algorithmControl theoryMagnet0103 physical sciencesAutomotive Engineering0202 electrical engineering electronic engineering information engineeringTorqueInterior permanent magnet synchronous machineAmpereMaximum torque
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Enhanced loss model algorithm for interior permanent magnet synchronous machines

2017

This paper presents an experimental study on the impact of the parameter variations over the performances of a LMA (Loss Model Algorithm) designed for an IPMSM (Interior Permanent Magnet Synchronous Machine). In a previous work, the characterization was carried out by assessing, for several working conditions, the motor parameters that influence the motor efficiency. The proposed enhanced loss model algorithm is implemented in a rapid prototyping system and its performances, in term of efficiency, are compared with other control systems, obtaining promising results.

010302 applied physicsRapid prototypingInterior permanent magnet synchronous motorComputer science020208 electrical & electronic engineeringWork (physics)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici01 natural sciencesDC motorTerm (time)Settore ING-IND/31 - Elettrotecnicaspeed control drive systemsMagnetControl system0103 physical sciences0202 electrical engineering electronic engineering information engineeringTorquepower loss minimizationSettore ING-INF/07 - Misure Elettriche E ElettronicheAlgorithmPermanent magnet synchronous machine2017 AEIT International Annual Conference
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