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Relevant bibliographies by topics / Coherence time enhancement

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Journal articles

Academic literature on the topic 'Coherence time enhancement'

Author: Grafiati

Published: 10 March 2023

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Journal articles on the topic "Coherence time enhancement"

1

Zhao, Zhenxing, Qi Li, Zhi Xia, and Dajing Shang. "A Single-Hydrophone Coherent-Processing Method for Line-Spectrum Enhancement." Remote Sensing 15, no. 3 (2023): 659. http://dx.doi.org/10.3390/rs15030659.

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Improving the line-spectrum detection capability of a single hydrophone is of great significance for the passive detection of small underwater platforms. In this paper, we propose a single-hydrophone cross-power spectrum (SHCS) method based on time-domain coherence. This method uses the coherence of the line spectrum and the non-coherence of the continuous spectrum noise to obtain coherent gain and improve the signal-to-noise ratio (SNR) of the line spectrum. The effects of the input SNR, number of averaging operations, and overlap ratio on the performance of the SHCS method under a background

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2

Hammer, Horst, Silvia Kuny, and Antje Thiele. "Enhancing Coherence Images for Coherent Change Detection: An Example on Vehicle Tracks in Airborne SAR Images." Remote Sensing 13, no. 24 (2021): 5010. http://dx.doi.org/10.3390/rs13245010.

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In Synthetic Aperture Radar (SAR) interferometry, one of the most widely used measures for the quality of the interferometric phase is coherence. However, in favorable conditions coherence can also be used to detect subtle changes on the ground, which are not visible in the amplitude images. For such applications, i.e., coherent change detection, it is important to have a good contrast between the unchanged (high-coherence) parts of the scene and the changed (low-coherence) parts. In this paper, an algorithm is introduced that aims at enhancing this contrast. The enhancement is achieved by a c

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3

Paolo, Agustin Di, Arne L. Grimsmo, Peter Groszkowski, Jens Koch та Alexandre Blais. "Control and coherence time enhancement of the 0–π qubit". New Journal of Physics 21, № 4 (2019): 043002. http://dx.doi.org/10.1088/1367-2630/ab09b0.

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4

Rahman, Abdul Ghaffar Abdul, Zhi Chao Ong, and Zubaidah Ismail. "Enhancement of coherence functions using time signals in Modal Analysis." Measurement 44, no. 10 (2011): 2112–23. http://dx.doi.org/10.1016/j.measurement.2011.08.003.

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5

Shreedhar Bhat, Gautam, Nikhil Shankar, and Issa Panahi. "Real-time joint dereverberation and speech enhancement for hearing aid applications using edge devices." Journal of the Acoustical Society of America 150, no. 4 (2021): A348. http://dx.doi.org/10.1121/10.0008541.

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In this work, we propose a joint dereverberation and speech enhancement technique for real-time applications. Speech dereverberation is based on the coherent-to-diffuse energy ratio (CDR) measured from the direction-of-arrival (DOA) dependent complex spatial coherence function. A personalized speech enhancement (SE) technique based on joint maximum a posteriori probability (JMAP) estimation that inherently accounts for the effects of changes in acoustic path and reverberation is used. The combination of these masking functions is used to enhance the speech corrupted by reverberation and noise

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6

WANG, LI, YUBING GONG, and XIU LIN. "ENHANCEMENT OF INTRINSIC SPIKING COHERENCE BY EXTERNAL NON-GAUSSIAN NOISE IN A STOCHASTIC HODGKIN–HUXLEY NEURON." Fluctuation and Noise Letters 10, no. 04 (2011): 359–69. http://dx.doi.org/10.1142/s0219477511000624.

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In this paper, we study the effect of external non-Gaussian noise on the temporal coherence of the intrinsic spiking induced by the channel noise in a stochastic Hodgkin–Huxley neuron. It is found that, for a sufficiently large membrane patch, the intrinsic spiking coherence can be enhanced by the proper values of non-Gaussian noise's strength, correlation time, or deviation from Gaussian distribution. And that the intrinsic spiking can exhibit coherence resonance when the noise's strength is optimal. This implies that the channel noise-induced intrinsic spiking may become more or the most ord

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7

Nakano, Tamami, Haruhisa Ota, Nobumasa Kato, and Shigeru Kitazawa. "Deficit in visual temporal integration in autism spectrum disorders." Proceedings of the Royal Society B: Biological Sciences 277, no. 1684 (2009): 1027–30. http://dx.doi.org/10.1098/rspb.2009.1713.

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Individuals with autism spectrum disorders (ASD) are superior in processing local features. Frith and Happe conceptualize this cognitive bias as ‘weak central coherence’, implying that a local enhancement derives from a weakness in integrating local elements into a coherent whole. The suggested deficit has been challenged, however, because individuals with ASD were not found to be inferior to normal controls in holistic perception. In these opposing studies, however, subjects were encouraged to ignore local features and attend to the whole. Therefore, no one has directly tested whether individ

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8

AWSCHALOM, DAVID D. "CONTROLLING SPIN COHERENCE WITH SEMICONDUCTOR NANOSTRUCTURES." International Journal of Modern Physics B 22, no. 01n02 (2008): 111–12. http://dx.doi.org/10.1142/s0217979208046165.

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We present two emerging opportunities for manipulating and communicating coherent spin states in semiconductors. First, we show that semiconductor microcavities offer unique means of controlling light-matter interactions in confined geometries, resulting in a wide range of applications in optical communications and inspiring proposals for quantum information processing and computational schemes. Studies of spin dynamics in microcavities — a new and promising research field — have revealed novel effects such as polarization beats, stimulated spin scattering, and giant Faraday rotation. Here, we

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9

Ding, Xueli, Bing Jia, Yuye Li, and Huaguang Gu. "Enhancement of coherence resonance induced by inhibitory autapse in Hodgkin–Huxley model." International Journal of Modern Physics B 35, no. 07 (2021): 2150110. http://dx.doi.org/10.1142/s0217979221501101.

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Inhibitory effect often suppresses electronic activities of the nervous system. In this paper, the inhibitory autapse is identified to enhance the degree of coherence resonance (CR) induced by noise in the Hodgkin–Huxley (HH) model with Hopf bifurcation from resting state to spiking with nearly fixed period [Formula: see text]. Without noise, the inhibitory autapse can induce a post inhibitory rebound (PIR) spike from the resting state at time delay approximating [Formula: see text] and can inhibit a spike of spiking at time delay approximating [Formula: see text]. In the presence of noise, CR

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10

Abd-Elmoniem, K. Z., A. B. M. Youssef, and Y. M. Kadah. "Real-time speckle reduction and coherence enhancement in ultrasound imaging via nonlinear anisotropic diffusion." IEEE Transactions on Biomedical Engineering 49, no. 9 (2002): 997–1014. http://dx.doi.org/10.1109/tbme.2002.1028423.

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