Results 21 to 30 of about 255,632 (300)
Second harmonic microscopy of monolayer MoS2 [PDF]
, 2013 We show that the lack of inversion symmetry in monolayer MoS2 allows strong optical second harmonic generation. Second harmonic of an 810-nm pulse is generated in a mechanically exfoliated monolayer, with a nonlinear susceptibility on the order of 1E-7 m/
Ajayan, Pulickel M. +6 more
core +2 more sources
Conditional Anomaly Detection with Soft Harmonic Functions [PDF]
2011 IEEE 11th International Conference on Data Mining, 2011 In this paper, we consider the problem of conditional anomaly detection that aims to identify data instances with an unusual response or a class label. We develop a new non-parametric approach for conditional anomaly detection based on the soft harmonic solution, with which we estimate the confidence of the label to detect anomalous mislabeling.
Valko, Michal +4 more
openaire +3 more sources
An Improved Specific Harmonic Detection Method Based on Adaptive Cancellation Principle [PDF]
E3S Web of Conferences, 2021 When the active power filter (APF) and the tunable filter are used for specific harmonic suppression, the accurate single harmonic current detection module is one of the key links to ensure its harmonic suppression effect.
Wang Lei +5 more
doaj +1 more source
Improved harmonic detection method based on ip-iq theory [PDF]
E3S Web of Conferences, 2021 Based on the traditional ip-iq harmonic detection theory, the accuracy of harmonic detection is easily affected by the phase-locked loop (PLL) output phase error, and the single low-pass filter (LPF) detection accuracy and filtering effect cannot be ...
Yao Zhisen, Gao Guige
doaj +1 more source
Evaluation of coated QCM for the detection of atmospheric ozone [PDF]
, 2011 A coated acoustic wave sensor has been developed to selectively detect atmospheric ozone. The selective detection has been assessed using a variety of coatings: beeswax, gallic acid, indigo carmine, polybutadiene, potassium iodide and sodium nitrite ...
Muller, JBA +3 more
core +1 more source
Rapid virus detection using magnetic second harmonics of superparamagnetic iron oxide nanoparticles
AIP Advances, 2023 Virus detection methods based on nonlinear magnetic response of magnetic nanoparticles have been investigated, and magnetic detection methods using the third harmonic are widely applied, owing to their high sensitivity and short measurement time.
Ryuichi Hirota +10 more
doaj +1 more source
Sensors, 2015 The Shannon sampling principle requires substantial amounts of data to ensure the accuracy of on-line monitoring of roller bearing fault signals. Challenges are often encountered as a result of the cumbersome data monitoring, thus a novel method focused ...
Gang Tang +4 more
doaj +1 more source
Numerical treatment of seismic accelerograms and of inelastic seismic structural responses using harmonic wavelets [PDF]
, 2007 The harmonic wavelet transform is employed to analyze various kinds of nonstationary signals common in aseismic design. The effectiveness of the harmonic wavelets for capturing the temporal evolution of the frequency content of strong ground motions is ...
Burrus C. S. +6 more
core +1 more source
One-Step-Prediction Discrete Observer Based Frequency-Locked-Loop Technique for Three-Phase System
IEEE Access, 2021 In grid-tied power converters, the grid parameters such as the frequency, phase angle of the fundamental component, and the harmonics are essential to the control of power converters, the fast and accurate estimation of the grid parameters is a challenge
Wei Hu +6 more
doaj +1 more source
An Observer-Based Harmonic Extraction Method with Front SOGI
Machines, 2022 With the further development of harmonic pollution in the power system, scientists have carried out research on harmonics. Among them, harmonic detection is the first step in harmonic research.
Maoguang Xu +4 more
doaj +1 more source