Results 21 to 30 of about 950,232 (298)

Retrieval of Gap Fraction and Effective Plant Area Index from Phase-Shift Terrestrial Laser Scans

open access: yesRemote Sensing, 2014
The characterization of canopy structure is crucial for modeling eco-physiological processes. Two commonly used metrics for characterizing canopy structure are the gap fraction and the effective Plant Area Index (PAIe).
Pyare Pueschel   +2 more
doaj   +1 more source

AI-HM Based Zero Portion Effects and Phase-Shift Optimization for Railway Auxiliary Inverter With Pulsating DC-Link

open access: yesIEEE Access, 2017
High-frequency pulsating dc-link inverter has higher power density than the conventional fixed dc-link inverter (FDCLI), and more complicate modulation methods owing to the coupling between the front end and the last stage links.
Lijun Diao   +5 more
doaj   +1 more source

Phase-shift calculation using continuum-discretized states [PDF]

open access: yes, 2008
We present a method for calculating scattering phase shifts which utilizes continuum-discretized states obtained in a bound-state type calculation.
Arai   +38 more
core   +1 more source

Bidirectional Dual Active Clamping Push-pull Dc-dc Converter

open access: yesEletrônica de Potência, 2016
In this paper is presented a bidirectional dual active clamping push-pull dc-dc converter, to be used in applications which require isolated bidirectional interface between two dc ports with low-voltage/low-current ripple.
Eduardo Valmir de Souza   +2 more
doaj   +1 more source

Instantaneous phase shifting deflectometry

open access: yesOptics Express, 2016
An instantaneous phase shifting deflectometry measurement method is presented and implemented by measuring a time varying deformable mirror with an iPhone ® 6. The instantaneous method is based on multiplexing phase shifted fringe patterns with color, and decomposing them in x and y using Fourier techniques.
Isaac, Trumper   +2 more
openaire   +2 more sources

The Role of Inert Objects in Quantum Mechanical Phase [PDF]

open access: yes, 1999
Quantum mechanical foundations of the polarized neutron phase shift experiment are discussed. The fact that the neutron retains its ground state throughout the experiment is shown to be crucial for the phase shift obtained.Comment: 7 pages, no figures ...
Blatt   +9 more
core   +2 more sources

Absolute Phase Retrieval Using One Coded Pattern and Geometric Constraints of Fringe Projection System

open access: yesApplied Sciences, 2018
Fringe projection technologies have been widely used for three-dimensional (3D) shape measurement. One of the critical issues is absolute phase recovery, especially for measuring multiple isolated objects.
Xu Yang   +5 more
doaj   +1 more source

Phase Shifts in Stochastic Resonance [PDF]

open access: yesPhysical Review Letters, 1992
The response of an overdamped bistable system to a periodic force is investigated using linear-response theory and by analog electronic experiment. It is shown, both theoretically and experimentally that a phase lag phi exists between the force and the response, and that |phi| passes through a maximum when the noise intensity is tuned through the range
DYKMAN MI   +3 more
openaire   +3 more sources

The Coulomb phase shift revisited

open access: yes, 2010
We investigate the Coulomb phase shift, and derive and analyze new and more precise analytical formulae. We consider next to leading order terms to the Stirling approximation, and show that they are important at small values of the angular momentum $l ...
ACC Villari   +20 more
core   +1 more source

Phase transitions in paradigm shift models. [PDF]

open access: yesPLoS ONE, 2013
Two general models for paradigm shifts, deterministic propagation model (DM) and stochastic propagation model (SM), are proposed to describe paradigm shifts and the adoption of new technological levels.
Huiseung Chae, Soon-Hyung Yook, Yup Kim
doaj   +1 more source

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