Search results for "power characteristic"

showing 3 items of 3 documents

A Trajectory-Driven 3D Channel Model for Human Activity Recognition

2021

This paper concerns the design, analysis, and simulation of a 3D non-stationary channel model fed with inertial measurement unit (IMU) data. The work in this paper provides a framework for simulating the micro-Doppler signatures of indoor channels for human activity recognition by using radiofrequency-based sensing technologies. The major human body segments, such as wrists, ankles, torso, and head, are modelled as a cluster of moving point scatterers. We provide expressions for the time variant (TV) speed and TV angles of motion based on 3D trajectories of the moving person. Moreover, we present mathematical expressions for the TV Doppler shifts and TV path gains associated with each movin…

Channel transfer functionGeneral Computer ScienceComputer scienceInternet of ThingsComputació centrada en humansDoppler EfecteActivity recognitionsymbols.namesakespectrogramInertial measurement unitVDP::Teknologi: 500::Medisinsk teknologi: 620Channel measurementsnon-stationary fading channelsmedicineGeneral Materials ScienceComputer visionNon-stationary fading channelsReconeixement de formes (Informàtica)channel state informationSpectrogrambusiness.industryWireless sensingGeneral Engineering:Enginyeria de la telecomunicació::Processament del senyal::Reconeixement de formes [Àrees temàtiques de la UPC]TorsoInertial measurement unitsExpression (mathematics)TK1-9971Time-variant Doppler power characteristicsmedicine.anatomical_structureChannel state informationHuman-centered computingchannel transfer functiontime-variant Doppler power characteristicsTrajectorysymbolsChannel state informationSpectrogramMicro-Doppler signature:Informàtica::Intel·ligència artificial [Àrees temàtiques de la UPC]Electrical engineering. Electronics. Nuclear engineeringArtificial intelligenceHuman activity recognitionbusinessDoppler effect
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Previsione delle prestazioni del veicolo su strada: stato dell’arte

2016

Questo lavoro contiene una rassegna dei metodi che sono usati per la previsione delle prestazioni del veicolo su strada, in dipendenza del motore installato. La prima parte mostra il calcolo delle resistenze al moto, cioè le forze che il veicolo deve vincere per avanzare sulle strade piane e in salita. Particolarmente interessante appare la parte che riguarda la resistenza aerodinamica, della quale si tratta di metodi sperimentali (galleria del vento), metodi empirici e metodi CFD. Si propone inoltre l’applicazione della norma CUNA sulla velocità per la determinazione dei consumi anche al calcolo dei coefficienti aerodinamici. La rassegna esclude la resistenza accidentale in curva perché no…

resistenza al rotolamentomanovrabilitàdiagram traction-speedresistenze al moto; resistenza di rampa; resistenza al rotolamento; resistenza aerodinamica; coefficiente di inerzia; previsioni delle prestazioni; caratteristica di potenza e di coppia; diagramma trazione velocità; diagramma potenza-velocità; diagrammi di consumo; manovrabilità; maneggevolezza; quadrilatero di Jeantaudpower characteristicdiagramma potenza-velocitàMotion resistances; hill resistance; rolling resistance; aerodynamic resistance; inertia coefficient; performance forecast; power characteristic; torque characteristic; diagram traction-speed; diagram power-speed; Consumption diagram; maneuverability; handling; Jeantaud quadrilateral.inertia coefficientcaratteristica di potenza e di coppiaSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchinemaneggevolezzaaerodynamic resistancediagramma trazione velocitàcoefficiente di inerziaperformance forecastquadrilatero di Jeantaudtorque characteristicConsumption diagramJeantaud quadrilateral.rolling resistanceresistenze al motoresistenza aerodinamicaMotion resistancemaneuverabilityresistenza di rampadiagrammi di consumodiagram power-speedhill resistancehandlingprevisioni delle prestazioni
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Engine/Transmission Matching

2014

This chapter deals with the forecasting of vehicle performance on the road, according to the installed engine. It begins with Section 1, which shows the calculation of the resistance to motion, that is, the forces that the vehicle must overcome to advance on flat roads and uphill. The calculation excludes accidental resistance in curves because it is not essential for predicting the behavior of the vehicle on the road. Section 2 begins with the power characteristic, the forecast by traction–speed and power–speed diagrams, calculation of gear ratios, and then passing to the limits to the estimated acceleration, feature consumption, and distance. This chapter concludes with a section on the d…

traction–speed diagramMatching (statistics)Engineeringmotion resistanceconsumption diagrammedia_common.quotation_subjectpower characteristicInertiaAutomotive engineeringinertia coefficientSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineAccelerationTorqueperformance forecastSimulationtorque characteristicmedia_commonbusiness.industryDiagrammaneuverabilityPower (physics)Transmission (telecommunications)Section (archaeology)power –speed diagrambusinesshandling
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