Pulse Time Modulation
Mostrando 1-12 de 37 artigos, teses e dissertações.
-
1. SEDENTARY LIFESTYLE IN ADOLESCENTS IS ASSOCIATED WITH IMPAIRMENT IN AUTONOMIC CARDIOVASCULAR MODULATION
RESUMO Introdução A prática regular de exercícios físicos ou o estilo de vida mais ativo são importantes na prevenção de doenças cardiovasculares, reduzindo não somente a mortalidade cardiovascular, mas também favorecendo a redução dos fatores de risco relacionados com essas doenças. Objetivo Avaliar a associação entre inatividade física
Rev Bras Med Esporte. Publicado em: 01/07/2019
-
2. Adaptive Fuzzy Sliding-Mode Control of Wheel Slide Protection Device for ER24PC Locomotive
Abstract Wheel Slide Protection Devices (WSPD) are employed in railway vehicles to maximize the average of the possible frictional braking force, which is a nonlinear function of the slip ratio of the wheel sets. In this paper, to control the WSPD, a low-order model is presented and un-modeled dynamics are considered as uncertainties. Due to the nonlinear dy
Lat. Am. j. solids struct.. Publicado em: 2017
-
3. Determinação voltamétrica de amitriptilina em formulações farmacêuticas com eletrodo de diamante dopado com boro explorando medidas em meio ácido
A simple and reliable voltammetric method is presented for the determination of amitriptyline using a boron-doped diamond electrode in 0.1 mol L-1 sulfuric acid solution as the support electrolyte. Under optimized differential pulse voltammetry conditions (modulation time 5 ms, scan rate 70 mV s-1, and pulse amplitude 120 mV), the electrode provides linear r
Quím. Nova. Publicado em: 2014
-
4. Registrador portátil de odorantes basado en la modulación de temperatura de un sensor mos comercial
A simple, portable and low-cost system for odor detection was developed using a single MOS commercial sensor and a microcontroller. The temperature modulation technique was implemented applying a DC signal pulse to the sensor heater by a bipolar transistor. Two odorant profiles, ethanol and acetic acid vapors, were obtained and distinguished based on their a
Quím. Nova. Publicado em: 2013
-
5. Sistemas CDMA ópticos coerentes baseados em codificação de fase espectral / Coherent optical CDMA systems based on spectral phase coding
In this work we perform a comprehensive analysis of a spectral phase-encoded time spreading optical code division multiple access (SPECTS-OCDMA) system. Despite being a numerical study, efforts were concentrated on the investigation of more realistic scenarios using as much information as possible from implemented test-beds in laboratories. In this context,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/12/2012
-
6. Modelagem de redes CDMA-PON baseadas em técnicas de cancelamento paralelo e códigos corretores de erros / Modeling of CDMA-PON networks using parallel interference cancellation and error correcting codes techniques
The advent of new services offered to end users, such as the so called triple play, which consists in the simultaneous traffic of voice, video, and data through the same communication infrastructure, has been pushing telecom operators towards providing adequate bandwidth as well as quality of service. This has brought the spotlight to passive optical network
Publicado em: 2009
-
7. Electrooptic combinator for ultra-fast pulsed microwave signal generation / Combinador eletro-optico para geração de sinais pulsados ultra-rapidos de microondas
A novel technique of pulsed microwave waveform generation has been developed. It is based on the mixture of two arbitrary signals, an ultra-fast pulse train and a microwave carrier, all generated from different sources and combined in the optical domain in order to preserve the spectral and temporal features as much as possible. The technique s concepts and
Publicado em: 2007
-
8. Estudo prospectivo comparativo dos ciclos de ultra-som 14% e 67% do WhiteStar na cirurgia de catarata por facoemulsificação com a técnica Nuclear Preslice
Purpose: To compare the 14% and 67% duty cycles of ultrasound power, continuous module, pulse manual control in the Sovereign phacoemulsification system with WhiteStar power modulation for cataract surgery. The phacoemulsification Nuclear Preslice technique was used to evaluate ultrasound effective time, ultrasound percentage, infusion volume amount and endo
Publicado em: 2007
-
9. Um Novo Método de Geração de Sinais Complexos / A new method for wave form generation
In this work new applications in digital systems, encryption systems, data transmission, etc., through a new mathematical approach are described. This work presents some new important DNAx technique contributions to mathematics, physics and engineering fields. First of all the DNAx equations are defined and applied to definition of Delta of Dirac function, U
Publicado em: 2006
-
10. On the study of the nonlinear effects of both Self-Phase and Cross-Phase Modulation in optical fibers / Estudo dos Efeitos Não Lineares de Automodulação de Fase e Modulação de Fase Cruzada em Fibras Ópticas
In this work some phenomena that occur during the propagation of pulses of light in optical fibers [1], [7], [13], [16], [18], [20], [21], [22], [24], [25], [59] e [60] are studied. The study is based on the Nonlinear Schrödinger Equation (NLS), gotten in Chapter 2 from the equations of Maxwell, considering a nonlinear susceptibility. The adopted mathematic
Publicado em: 2003
-
11. Plataforma de ensaios para acionamento e controle de motores usando DSPS
This work presents a hardware and software integrated environment for study and development of drivers and controls for induction motors. In the platform setup two Texas Instruments DSPs (Digital Signal Processors) has been used, in a master-slave conguration: the TMS320C6201 DSP, contained in a manufacturers evaluation board inserted in a PC, and the TMS320
Publicado em: 2002
-
12. Desenvolvimento de um tomógrafo de ressonância magnética: integração e otimização. / Development of a magnetic resonance tomograph: integration and improvement.
The present work describes the development of a Magnetic Resonance Tomography system to be used for medical diagnostics. It is based on commercially available subsystems such as used as in commercial MRI equipments. The main contributions to the project were: the development of fill up electronics and software needed to turn the acquired hardware into a MR T
Publicado em: 1995