Results 11 to 20 of about 950,232 (298)
Frontiers in Marine Science, 2021 Macroalgal forests play a key role in shallow temperate rocky reefs worldwide, supporting communities with high productivity and providing several ecosystem services.
Francesca Gizzi +14 more
doaj +1 more source
Improved Separation of Tone and Broadband Noise Components from Open Rotor Acoustic Data
Aerospace, 2016 The term “open rotor” refers to unducted counter-rotating dual rotors or propellers used for propulsion. The noise generated by an open rotor is very complicated and requires special techniques for its analysis.
Dave Sree, David B. Stephens
doaj +1 more source
Phase effect in time-stamped accelerometer measurements – an experimental approach [PDF]
International Journal of Metrology and Quality Engineering, 2012 The phase error in a high quality accelerometer was investigated on the basis of systematic experiments on a prototype platform permitting controlled vertical harmonic oscillations.
Moschas F., Stiros S.
doaj +1 more source
IEEE Access, 2021 The scattered resistive elements residing in a dual-active-bridge (DAB) dc/dc converter can adversely affect its transient performance especially when the load change is large.
Jian Yin +4 more
doaj +1 more source
On the general problem of quantum phase estimation [PDF]
, 1998 The problem of estimating a generic phase-shift experienced by a quantum state is addressed for a generally degenerate phase shift operator. The optimal positive operator-valued measure is derived along with the optimal input state. Two relevant examples
Ban +16 more
core +2 more sources
Comparison and Validation of Five Modulation Strategies for a Dual Active Bridge Converter
EAI Endorsed Transactions on Energy Web, 2023 This paper addresses the comparison and validation of different modulations for an isolated dc-dc dual active bridge converter (DAB), namely, Duty-Cycle Modulation, Single Phase Shift (SPS), Dual Phase Shift (DPS), Extended Phase Shift (EPS) and Triple ...
Sergio Coelho +5 more
doaj +1 more source
Performance Analysis of Hybrid Phase Shift Keying over Generalized Nakagami Fading Channels
Journal of Telecommunications and Information Technology, 2023 In addition to the benefits of hybrid phase shift keying (HPSK) modulation in reducing the peak to average power ratio of the transmitted signal to reduce the zero cross- ings and the 0◦-degree phase transmissions, HPSK enhances the bit error rate (BER)
Mahmoud Youssuf , Mohamed Z. Abdelmageed
doaj +3 more sources
Gouy phase compensation in quasi-phase matching [PDF]
, 2008 In any focussed nonlinear interaction the focus induced phase shift, known as the Gouy phase shift, provides an imperfection in phase matching for any linearly invariant material.
Belmonte +8 more
core +1 more source
Chemical Sensing Using Fiber Cavity Ring-Down Spectroscopy
Sensors, 2010 Waveguide-based cavity ring-down spectroscopy (CRD) can be used for quantitative measurements of chemical concentrations in small amounts of liquid, in gases or in films.
Hans-Peter Loock +4 more
doaj +1 more source
IEEE Photonics Journal, 2018 We demonstrate a phase-shifted fiber Bragg grating with a taper induced by femtosecond laser micromachining. In this configuration, a fiber taper fabricated by an arc discharge in a fiber splicer was sandwiched between two fiber Bragg grating sections ...
Feng Zhu +9 more
doaj +1 more source