Results 1 to 10 of about 204,662 (249)

Strong particle-hole asymmetry of charge instabilities in doped Mott insulators [PDF]

open access: yesNew Journal of Physics, 2014
We study possible charge instabilities in doped Mott insulators by employing the two-dimensional t - J model with a positive value of the next nearest-neighbor hopping integral $t^{\prime} $ on a square lattice, which is applicable to electron-doped ...
Matías Bejas   +2 more
doaj   +4 more sources

SQUARE-WAVE FREQUENCY MODULATION IN MICROWAVE SPECTROSCOPY [PDF]

open access: yesRadio Physics and Radio Astronomy, 2022
Subject and Purpose. The frequency modulation (FM)combined with lock-in detection, the technique which is used in microwave spectroscopy for enhancing the sensitivity of measurements, as well as the effects due to standing wavesinthe measuring absorption
E. A. Alekseev   +2 more
doaj   +1 more source

Generative adversarial networks-enhanced quasi-square wave modulated photoacoustic spectroscopy: A highly sensitive NH3 detection method under strong background noise [PDF]

open access: yesPhotoacoustics
We present a photoacoustic spectroscopy reconstruction generative adversarial network (PASR-GAN), which boosts the NH3 detection performance of the photoacoustic spectroscopy sensor through collaborative optimization of the light modulation mode ...
Yanfeng Li   +8 more
doaj   +2 more sources

A novel modulation method for flexible multi-state switches with shared modules

open access: yes电力工程技术, 2023
As a new type of power electronic device to replace traditional mechanical switches, the soft open point (SOP) has the advantages of fast response speed and controllable power flow.
LI Zheng   +3 more
doaj   +1 more source

Spectral Characteristics of Square-Wave-Modulated Type II Long-Period Fiber Gratings Inscribed by a Femtosecond Laser

open access: yesSensors, 2021
We study here the spectral characteristics of square-wave-modulated type II long-period fiber gratings (LPFGs) inscribed by a femtosecond laser.
Xiaofan Zhao   +5 more
doaj   +1 more source

Synchronized audio-visual transients drive efficient visual search for motion-in-depth. [PDF]

open access: yesPLoS ONE, 2012
In natural audio-visual environments, a change in depth is usually correlated with a change in loudness. In the present study, we investigated whether correlating changes in disparity and loudness would provide a functional advantage in binding disparity
Marina Zannoli   +3 more
doaj   +1 more source

Direct-Sequence-CDMA in Highly Sensitive Indirect Time-of-Flight Distance Sensor

open access: yesIEEE Photonics Journal, 2023
This work presents the application of Direct-Sequence Code-Division-Multiple-Access (DS-CDMA) to tackle the primary problem of simultaneous multi-access of a shared light channel in an indirect Time-of-Flight measurement system based on on-off-keyed (OOK)
Fabio Schartmuller   +4 more
doaj   +1 more source

An experimental study of intermodulation effects in an atomic fountain frequency standard [PDF]

open access: yes, 2007
The short-term stability of passive atomic frequency standards, especially in pulsed operation, is often limited by local oscillator noise via intermodulation effects.
G. Dudle   +7 more
core   +4 more sources

Fiber fusion splicing error analysis of all-fiber optic current sensor with different demodulation schemes

open access: yesEnergy Reports, 2022
Measurement accuracy is essential for the all-fiber optic current sensor. Angle errors of axis alignment in the fusion processing affect the measurement accuracy with different modulation and demodulation methods.
Jianhua Wu   +3 more
doaj   +1 more source

Hybrid-wave modulation for modular multilevel high-frequency DC converter in DC distribution application

open access: yesThe Journal of Engineering, 2019
Compared with AC distribution networks, DC distribution networks reduce the utilisation of power converters, power loss, and construction cost. In DC distribution network, the high-frequency modular multilevel DC converter (MDCC), which connects the low ...
Yu Wang   +4 more
doaj   +1 more source

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