Results 1 to 10 of about 3,059,110 (191)
Time–Frequency Warped Waveforms [PDF]
IEEE Communications Letters, 2019 4 pages, 5 figures; accepted version (The URL for the final version: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8540914&isnumber=8605392)
Mostafa Ibrahim +2 more
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A continuum of bright and dark-pulse states in a photonic-crystal resonator
Nature Communications, 2022 A Kerr-nonlinear resonator with normal dispersion supports bright and dark pulse states. With photonic crystal ring resonators, this work demonstrates a continuum across these nonlinear states and explores the underlying mechanism.
Su-Peng Yu +3 more
doaj +1 more source
Applied Sciences, 2021 The self-comparison method is a powerful tool in the uncertainty evaluation of optical lattice clocks, but any drifts will cause a frequency offset between the two compared clock loops and thus lead to incorrect measurement result.
Chihua Zhou +4 more
doaj +1 more source
New Time-Frequency Distribution [PDF]
Circuits, Systems, and Signal Processing, 1995 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pei, Soo-Chang, Tsai, Er-Jung
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Sparse time-frequency representations [PDF]
Proceedings of the National Academy of Sciences, 2006 Auditory neurons preserve exquisite temporal information about sound features, but we do not know how the brain uses this information to process the rapidly changing sounds of the natural world. Simple arguments for effective use of temporal information led us to consider the reassignment class of time-frequency representations as ...
Gardner, Timothy J. +1 more
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Joint Time–Frequency Scattering [PDF]
IEEE Transactions on Signal Processing, 2019 In time series classification and regression, signals are typically mapped into some intermediate representation used for constructing models. Since the underlying task is often insensitive to time shifts, these representations are required to be time-shift invariant.
Joakim Anden +2 more
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Time-Frequency Learning Machines [PDF]
IEEE Transactions on Signal Processing, 2007 Over the last decade, the theory of reproducing kernels has made a major breakthrough in the field of pattern recognition. It has led to new algorithms, with improved performance and lower computational cost, for nonlinear analysis in high dimensional feature spaces.
Honeine, Paul +2 more
openaire +5 more sources
Efforts towards a low-temperature-sensitive physics package for vapor cell atomic clocks
Satellite Navigation, 2020 Strong environmental dependence is an intractable problem for vapor cell clocks, for which the high-temperature sensitivity of the physics package is considered one of the dominant reasons.
Qiang Hao +5 more
doaj +1 more source
Demonstration of a time scale with the 87Sr optical lattice clock at NTSC
AIP Advances, 2023 Optical clocks have been applied to the generation of time scales since they provide superb uncertainty and instability in recent years. This paper presents the simulations about the impact of the optical clock’s operational strategies on the performance
Qinfang Xu +6 more
doaj +1 more source
Applied Sciences, 2020 The Zeeman shift plays an important role in the evaluation of optical lattice clocks since a strong bias magnetic field is applied for departing Zeeman sublevels and defining a quantization axis.
Xiaotong Lu +4 more
doaj +1 more source