Showing 321 - 340 results of 610 for search '"wavelet"', query time: 0.04s Refine Results
  1. 321

    Asymptotically Sufficient Statistics in Nonparametric Regression Experiments with Correlated Noise by Andrew V. Carter

    Published 2009-01-01
    “…These statistics are derived from a wavelet decomposition that is used to whiten the noise process and to effectively separate high-resolution and low-resolution components. …”
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    Article
  2. 322

    Motion Objects Segmentation and Shadow Suppressing without Background Learning by Y.-P. Guan

    Published 2014-01-01
    “…An approach to segmenting motion objects and suppressing shadows without background learning has been developed. Since wavelet transformation indicates the position of sharper variation, it is adopted to extract the information contents with the most meaningful features based on two successive video frames only. …”
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    Article
  3. 323

    Sparse Optimization of Vibration Signal by ADMM by Song Wanqing

    Published 2017-01-01
    “…Moreover, using the discrete wavelet transform in signal reconstruction there still are some outliers but the error is unstable. …”
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    Article
  4. 324

    Intelligent Turning Tool Monitoring with Neural Network Adaptive Learning by Maohua Du, Peixin Wang, Junhua Wang, Zheng Cheng, Shensong Wang

    Published 2019-01-01
    “…Based on LabVIEW and MATLAB hybrid programming, the waveforms of signals are observed and the significant characteristics of signals are extracted through the time-frequency domain analysis and then the calculation of the energy proportion of each frequency band obtained using 4 levels of wavelet packet decompositions of the vibration signal as well as 8 levels of wavelet multiresolution decompositions of the AE signal; the ensuing Relief-F algorithm is used to further reextract the features that are most relevant to the tool state as input of neural network pattern recognition. …”
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    Article
  5. 325

    Research on the Correlation between Information and Communication Technology Development and Consumer Spending Based on Artificial Intelligence and Time Series Econometric Model by Chaozhi Fan, Siong Hook Law, Saifuzzaman Ibrahim, N. A. M. Naseem

    Published 2022-01-01
    “…Moreover, this paper organically combines the advantages of wavelet analysis and hidden Markov model to construct a wavelet domain hidden Markov chain model. …”
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    Article
  6. 326

    Dynamic Response of a Beam Resting on a Nonlinear Foundation to a Moving Load: Coiflet-Based Solution by Piotr Koziol, Zdzislaw Hryniewicz

    Published 2012-01-01
    “…The solution for vibrations is obtained by using the Adomian's decomposition combined with the Fourier transform and a wavelet-based procedure for its computation. The adapted approximating method uses wavelet filters of Coiflet type that appeared a very effective tool for vibration analysis in a few earlier papers. …”
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    Article
  7. 327

    Bolt Detection Signal Analysis Method Based on ICEEMD by Chunhui Guo, Zhan Zhang, Xin Xie, Zhengyu Yang

    Published 2018-01-01
    “…The noise of the IMFs is eliminated by the wavelet soft threshold denoising technique. Based on the approximate entropy and the wavelet denoising principle, the ICEEMD-De anchor signal analysis method is proposed. …”
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    Article
  8. 328

    Planetary Gearbox Fault Diagnosis Using Envelope Manifold Demodulation by Weigang Wen, Robert X. Gao, Weidong Cheng

    Published 2016-01-01
    “…This method combines complex wavelet, manifold learning, and frequency spectrogram to implement planetary gear fault characteristic extraction. …”
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    Article
  9. 329

    The influence of post-processing methods and frequency bands on rs-fMRI: An example of electroacupuncture at Zusanli (ST36) by YingJie Kang, YiLei Chen, ZhiGang Gong, YanWen Huang, Hui Wang, Jiling Huang, SongHua Zhan, YiJing Li, WenLi Tan

    Published 2025-03-01
    “…Three post-processing methods were used to evaluate the amplitude of LFOs: fractional ALFF (fALFF), percent amplitude of fluctuation (PerAF) and wavelet-transform ALFF (Wavelet-ALFF). Besides the conventional low-frequency band (0.01–0.1Hz), three additional sub-bands were observed, including slow-6 (0–0.01Hz), slow-5 (0.01–0.027Hz) and slow-4 (0.027–0.073Hz). …”
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  10. 330

    Slow Motion and Zoom in HD Digital Videos Using Fractals by Maurizio Murroni, Cristian Perra, Daniele D. Giusto

    Published 2009-01-01
    “…Purpose of this paper is to present an alternative technique combining fractals theory and wavelet decomposition to achieve spatial zoom and slow motion replay of HD digital color video sequences. …”
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    Article
  11. 331

    Experimental Investigation of Stall Inception Mechanisms of Low Speed Contra Rotating Axial Flow Fan Stage by Tegegn Dejene Toge, A. M. Pradeep

    Published 2015-01-01
    “…The present paper is an attempt in understanding the stall inception mechanism in a low speed, contra rotating axial flow fan stage, using wavelet transforms. The rotors used in this study have relatively large tip gap (about 3% of the blade span) and aspect ratio of 3. …”
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  12. 332

    Solutions of a Class of Multiplicatively Advanced Differential Equations II: Fourier Transforms by David W. Pravica, Njinasoa Randriampiry, Michael J. Spurr

    Published 2022-01-01
    “…In a large subset of the general case, we introduce a new family of Schwartz wavelet MADE solutions Wμ,λt for μ and λ rational with λ>0. …”
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  13. 333
  14. 334

    Recognition and Simulation of Exercise Mode Based on Energy Consumption Model by Yulei Li

    Published 2021-01-01
    “…This paper proposes a human movement recognition method based on hybrid features, which mostly can represent the curve of the second generation wavelet transform edge thinning, and from the edge and texture features of the optimal said human posture, the statistical characteristic of the second generation wavelet transform is subtly trained as image characteristics, learning and recognition of human movement. …”
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    Article
  15. 335

    Hybrid Time Series Method for Long-Time Temperature Series Analysis by Guangdong Huang, Jiahong Li

    Published 2021-01-01
    “…Then, we use 10 different discrete wavelet functions to decompose and reconstruct the observed data. …”
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    Article
  16. 336

    A Hybrid Chatter Detection Method Based on WPD, SSA, and SVM-PSO by Erhua Wang, Peng Yan, Jie Liu

    Published 2020-01-01
    “…In this paper, a hybrid chatter detection method (HCDM) is proposed for chatter feature extraction and classification in end milling. Firstly, wavelet packet decomposition is employed to decompose cutting vibration signals into a series of wavelet coefficients, and the signals of each frequency band are reconstructed. …”
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    Article
  17. 337

    Noninvasive Load Identification Method Based on Feature Similarity by Hongyan Li, Xianfeng Ding, Dan Qu, Jiang Lin

    Published 2020-01-01
    “…In this paper, the similarity model is established to realize the noninvasive load identification of power by determining the feature database for the equipment. Firstly, the wavelet decomposition method and the wavelet threshold processing method are used to remove abnormal points and reduce noise of the original data, respectively. …”
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  18. 338

    Damage Identification Investigation of Retaining Wall Structures Based on a Virtual Impulse Response Function by Qian Xu

    Published 2016-01-01
    “…To eliminate the influence of excitation on the wavelet packet frequency band energy spectrum (ES), ES is acquired via wavelet packet decomposition of a virtual impulse response function. …”
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  19. 339

    Multiscale Latent Variable Regression by Mohamed N. Nounou, Hazem N. Nounou

    Published 2010-01-01
    “…Multiscale wavelet-based representation of data has been shown to be a powerful tool in feature extraction from practical process data. …”
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  20. 340

    An Improved Method of EWT and Its Application in Rolling Bearings Fault Diagnosis by Zhicheng Qiao, Yongqiang Liu, Yingying Liao

    Published 2020-01-01
    “…The traditional empirical wavelet transform (EWT) decomposes signals into a large number of components, and it is difficult to select suitable components that contain fault information. …”
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    Article