Results 1 to 10 of about 111,648 (246)
IEEE Access, 2020 The carrier-based PWM method (CBPWM) and the space vector PWM method (SVPWM) are two main modulation methods for diode clamped multilevel converters, and there is a certain relationship between these two modulation strategies.
Yingjie He +3 more
doaj +2 more sources
A Filter-Less Time-Domain Method for Reference Signal Extraction in Shunt Active Power Filters
Energies, 2022 Current distortion degrades power quality and affects system performance, especially for sensitive loads that require pure sinusoidal waves. Owing to its excellent dynamic response, a well-designed active power filter (APF) can achieve a total harmonic ...
Abdallah El Ghaly +3 more
doaj +2 more sources
Transmission Properties of Fabry–Pérot Filter Consisting of Silicon-Based High-Contrast Gratings
IEEE Photonics Journal, 2016 In this paper, we design and theoretically investigate an ultracompact Fabry–Pérot filter (FPF) consisting of two silicon-based high-contrast gratings (HCGs).
Wei Wang +5 more
doaj +2 more sources
Energies, 2020 Diode-clamped multi-level converters have DC-side capacitors in series, which will lead to the unbalance of DC-side capacitor voltage, the distortion of the output waveform, the increase of total harmonic distortion (THD), and even the damage of ...
Yingjie He +3 more
doaj +1 more source
Mapping the gravitational wave background [PDF]
, 2001 The gravitational wave sky is expected to have isolated bright sources superimposed on a diffuse gravitational wave background. The background radiation has two components: a confusion limited background from unresolved astrophysical sources; and a ...
+14 more
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PAPPA: Primordial Anisotropy Polarization Pathfinder Array [PDF]
, 2006 The Primordial Anisotropy Polarization Pathfinder Array (PAPPA) is a balloon-based instrument to measure the polarization of the cosmic microwave background and search for the signal from gravity waves excited during an inflationary epoch in the early ...
A. Kogut +22 more
core +2 more sources
1-Bit Massive MIMO Downlink Based on Constructive Interference [PDF]
, 2018 In this paper, we focus on the multiuser massive multiple-input single-output (MISO) downlink with low-cost 1-bit digital-to-analog converters (DACs) for PSK modulation, and propose a low-complexity refinement process that is applicable to any existing 1-
Li, Ang +2 more
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Photons with sub-Planckian Energy Cannot Efficiently Probe Space-Time Foam [PDF]
, 2014 Extra-galactic sources of photons have been used to constrain space-time quantum fluctuations in the Universe. In these proposals, the fundamental "fuzziness" of distance caused by space-time quantum fluctuations has been directly identified with ...
Chen, Yanbei, Ma, Yiqiu, Wen, Linqing
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Theoretical study of Acousto-optical coherence tomography using random phase jumps on US and light [PDF]
, 2011 Acousto-Optical Coherence Tomography (AOCT) is variant of Acousto Optic Imaging (called also ultrasonic modulation imaging) that makes possible to get z resolution with acoustic and optic Continuous Wave (CW) beams.
A. C. Boccara +38 more
core +5 more sources
Conditional large data scattering results for the Dirac-Klein-Gordon system
, 2017 We obtain conditional results on the global existence and scattering for large solutions of the Dirac-Klein-Gordon system in critical spaces in dimension $1+3$.
Candy, Timothy, Herr, Sebastian
core +1 more source