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High-level multistep inverter optimization using a minimum number of power transistors
(2006)
Multilevel inverters with a large number of steps (more than 50 levels) can generate high quality voltage waveforms, good enough to be considered as suitable voltage template generators. Many levels or steps can follow a ...
Influência da anodização pulsada nas propriedades da alumina anódica porosa (AAP)
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência dos Materiais - PPGCM-SoCâmpus Sorocaba, 2017-04-27)
Porous anodic alumina can be obtained, in addition to conventional methods such as potentiostatic and galvanostatic, or by pulsed method. Among these are the methods of discontinuous pulse, hybrid pulse and polarized pulse ...
Ultrashort laser pulse retrieval using single-shot VAMPIRE
(IEEE, 2014)
Characterizing ultrashort laser pulses is a challenging task. By now several methods are established which can be divided into interferometric methods like SPIDER (spectral phase interferometry for direct electric field ...
PWM Method to Eliminate Power Sources in a Nonredundant 27-Level Inverter for Machine Drive Applications
(IEEE, 2009)
A nonredundant three-stage 27-level inverter using ldquoHrdquo converters is analyzed for medium- and high-power machine drive applications. The main advantage of this converter is the optimization of levels with a minimum ...
Suppressing the effect of ICI power using dual sinc pulses in OFDM-based systems
(Elsevier, 2016)
Sensitivity to frequency offset in orthogonal frequency division multiplexing (OFDM)-based systems allow unwanted interference among the subcarriers, which results in intercarrier interference (ICI). A novel family of ...
Improved Nyquist-I Pulses to Enhance the Performance of OFDM-Based Systems
(Springer, 2017)
Pulse shaping is used in orthogonal frequency division multiplexing (OFDM) based systems to reduce inter-carrier interference (ICI) power and peak-to-average power ratio (PAPR), which are considered the major weaknesses ...