Results 241 to 250 of about 306,242 (273)
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Pure-tone increment detection in harmonic and inharmonic backgrounds
The Journal of the Acoustical Society of America, 1990The present study investigated the effect of increasing the number and frequency range of background components upon the detection of an increment to the intensity of the center component. Previous studies [e.g., Green et al., J. Acoust. Soc. Am. 75, 1163–1167 (1984)] have demonstrated that, for background stimuli consisting of logarithmically spaced ...
C C, Henn, C W, Turner
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The Objective-Oriented Optimization of Background Harmonic Suppression Strategy
2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia), 2020In the distribution network or long-distance transmission line system, harmonic may be severely amplified due to resonance between the line inductor and reactive compensation capacitor or line parasitic capacitor. In order to suppress harmonic amplification, the resistive active power filter (R-APF) is usually installed on the line, it changes the ...
Min Zhang +4 more
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Partial Linear Method for Background Harmonic Voltage Estimation
Advanced Materials Research, 2014The linear regression method which will be influenced by fluctuations could only calculate constant background harmonic voltage. To make up the limitation, this paper studies partial linear method. The method expands fluctuant background harmonic voltage at a time in accordance with Taylor series.
Xiu Fang Jia +2 more
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Co-linear, fringe-free, background-free third harmonic FROG
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, 2006We demonstrate background-free, fringe-free THG-FROG measurements at the focus of a high numerical aperture objective for the first time.
Rebecca Chadwick +4 more
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Research on harmonic current detection method background of microgrid
2013 IEEE 11th International Conference on Electronic Measurement & Instruments, 2013Due to the type of power in the microgrid are numerous, intermittent and randomness, and is accompanied by a large number of inverters, so the power quality problems such as harmonics are produced. For this reson, this paper presents a new power quality detection method, this method used the Chain Mixed Morphological Filter (CMMF) instead of the Low ...
Li Shengqing +4 more
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SCIENTIA SINICA Technologica, 2019
The large-power rectifier system injects numerous harmonics into the public grid, which results in serious effects on the power quality at the point of common coupling (PCC). The two methods, (1) establishment of the accurate probabilistic model for the background harmonics and (2) assessment of the harmonic contribution, are beneficial for evaluating ...
QianYi LIU +3 more
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The large-power rectifier system injects numerous harmonics into the public grid, which results in serious effects on the power quality at the point of common coupling (PCC). The two methods, (1) establishment of the accurate probabilistic model for the background harmonics and (2) assessment of the harmonic contribution, are beneficial for evaluating ...
QianYi LIU +3 more
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Digital Background Correction of Harmonic Distortion in Pipelined ADCs
IEEE Transactions on Circuits and Systems I: Regular Papers, 2006Pipelined analog-to-digital converters (ADCs) are sensitive to distortion introduced by the residue amplifiers in their first few stages. Unfortunately, residue amplifier distortion tends to be inversely related to power consumption in practice, so the residue amplifiers usually are the dominant consumers of power in high-resolution pipelined ADCs ...
A. Panigada, I. Galton
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Background Voltage Harmonic Suppression Strategy of a Distribution Network
2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019In the distributed generation system, the resonance between the power factor correction capacitors and the line parasitic inductors may cause significant background voltage harmonic amplification phenomenon. In order to solve this problem, this paper firstly analyzes the propagation law of background harmonics on the transmission line. Then, proposes a
Xiaofeng Sun +4 more
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Optimal Transmit Phasing on Tissue Background Suppression in Contrast Harmonic Imaging
Ultrasound in Medicine & Biology, 2008Ultrasonic harmonic imaging provides superior image quality than linear imaging and has become an important diagnostic tool in many clinical applications. Nevertheless, the contrast-to-tissue ratio (CTR) in harmonic imaging is generally limited by tissue background signal comprising both the leakage harmonic signal and the tissue harmonic signal ...
Shen, C.-C., Hsieh, Y.-C.
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Second-harmonic generation in optical fibers on a continuous-wave background
Physical Review E, 2004We predict that a different type of second-harmonic generation (SHG) in nonlinear optical fibers is possible for the waves excited from a continuous-wave background. We show that in a normal dispersion regime and near the zero-dispersion point of a single-mode optical fiber the phase-matching condition of the SHG can be satisfied by suitably choosing ...
Weina, Cui, Guoxiang, Huang, Bambi, Hu
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