Showing 481 - 500 results of 922 for search '"wavelet"', query time: 0.06s Refine Results
  1. 481

    Transient Thermal Cooling of Electronics Systems using Functional Graded Fins: Hybrid Computational Analysis by Akinwale Emmanuel Jemiseye, Gbeminiyi Musibau Sobamowo, Olayiwola Olatunji Mayowa

    Published 2023-05-01
    Subjects: “…Electronic cooling; Thermal-management; Convective-radiative fin; Functionally graded materials (FGMs); Fin tip temperature; Laplace Transform-Legendre Wavelet Collocation Method (.LT-LWCM).…”
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    Article
  2. 482
  3. 483

    Structural Health Monitoring of Steel Pipes under Different Boundary Conditions and Choice of Signal Processing Techniques by Rais Ahmad, Tribikram Kundu

    Published 2012-01-01
    “…Several types of mother wavelet functions such as Daubechies, Symlet, and Meyer have been used for the continuous wavelet transform to investigate the most suitable wavelet function for defect detection. …”
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    Article
  4. 484

    Efficient Time-Frequency Localization of a Signal by Satish Chand

    Published 2014-01-01
    “…A new representation of the Fourier transform in terms of time and scale localization is discussed that uses a newly coined A-wavelet transform (Grigoryan 2005). The A-wavelet transform uses cosine- and sine-wavelet type functions, which employ, respectively, cosine and sine signals of length 2π. …”
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    Article
  5. 485

    Approximation of Bivariate Functions via Smooth Extensions by Zhihua Zhang

    Published 2014-01-01
    “…After that, we expand the smooth, periodic function into a Fourier series or a periodic wavelet series or we expand the smooth, compactly supported function into a wavelet series. …”
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    Article
  6. 486

    A Novel Fault Diagnosis Method for Motor Bearing Based on DTCWT and AFSO-KELM by Yan Lu, Peijiang Li

    Published 2021-01-01
    “…Aiming at the defects of wavelet transform-based feature extraction and extreme learning machine-based classification, a novel fault diagnosis method for motor bearing, based on dual tree complex wavelet transform and artificial fish swarm optimization-kernel extreme learning machine (DTCWT-AFSO-KELM), is proposed in this paper. …”
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    Article
  7. 487

    A Spectrum Detection Approach for Bearing Fault Signal Based on Spectral Kurtosis by Yunfeng Li, Liqin Wang, Jian Guan

    Published 2017-01-01
    “…According to the similarity between Morlet wavelet and fault signal and the sensitive characteristics of spectral kurtosis for the impact signal, a new wavelet spectrum detection approach based on spectral kurtosis for bearing fault signal is proposed. …”
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    Article
  8. 488

    Research on Feature Fusion Method of Mine Microseismic Signal Based on Unsupervised Learning by Rui Liu

    Published 2021-01-01
    “…Aiming at the problem of unobvious feature extraction of multiclass mine microseismic signals, this paper is based on the unsupervised learning method in the deep learning method, combined with wavelet packet energy ratio and empirical modulus singular value decomposition, and proposes a method based on wavelet packet energy and empirical modulus singular value decomposition and proposes a method (M-W&E) based on wavelet packet energy and empirical modulus singular value decomposition. …”
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    Article
  9. 489

    Quantitative Identification of Pulse-Like Ground Motions Based on Hilbert–Huang Transform by Zhen Liu

    Published 2021-01-01
    “…In this method, HHT is used to decompose ground motions instead of wavelet. HHT can overcome the dependence of wavelet analysis on the selection of mother wave, and thus more complex velocity pulses can be identified. …”
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    Article
  10. 490

    Experiment Analysis of Drilling Feedback Signal from Simulation of Roadway Roof by Gang Guo, Haoyuan Zhao, Zhilong Qi, Chenjun Hu, Baofu Zhao, Shengzhi Wang

    Published 2022-01-01
    “…And more research is needed to determine the selection method of wavelet.…”
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    Article
  11. 491

    Feature Recognition of Crop Growth Information in Precision Farming by Hanqing Sun, Xiaohui Zhang, Zhou Yu, Gang Xi

    Published 2018-01-01
    “…To identify plant electrical signals effectively, a new feature extraction method based on multiwavelet entropy and principal component analysis is proposed. The wavelet energy entropy, wavelet singular entropy, and the wavelet variance entropy of plants’ electrical signals are extracted by a wavelet transformation to construct the combined features. …”
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    Article
  12. 492

    RECOGNITION METHOD OF METAL FRACTURE IMAGES BASED ON GROUPLET TRANSFORM AND KERNEL PRINCIPAL COMPONENT ANALYSIS by LI ZhiNong, CHEN Kang, YAN JingWen, YANG YanChun

    Published 2016-01-01
    “…Grouplet transform is a new directional wavelet. This wavelet can be transformed at any time and space,and adaptively change the basis according to image texture. …”
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    Article
  13. 493

    Evaluation of Hybrid Soft Computing Model’s Performance in Estimating Wave Height by Tzu-Chia Chen, Zryan Najat Rashid, Biju Theruvil Sayed, Arif Sari, Ahmed Kateb Jumaah Al-Nussairi, Majid Samiee-Zenoozian, Mehrdad Shokatian-Beiragh

    Published 2023-01-01
    “…According to the findings of this study, the accuracy of WANN and Wavelet-M5 hybrid models in evaluating wave height is superior to that of classic ANN and M5MT, and it is recommended that WANN and Wavelet-M5 hybrid models be used to estimate wave height.…”
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    Article
  14. 494

    An Efficient Image Denoising Method for Wireless Multimedia Sensor Networks Based on DT-CWT by Rachid Sammouda, Abdul Malik S. Al-Salman, Abdu Gumaei, Nejmeddine Tagoug

    Published 2015-11-01
    “…This method is designed to reduce the image noises by selecting an optimal threshold value estimated from the approximation of wavelet coefficients. In our experiment, the proposed method was tested and compared with standard Discrete Wavelet Transform (DWT) and Stationary Wavelet Transform (SWT) on a set of natural scene images. …”
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    Article
  15. 495

    Research on the Method of Detecting the Spreading Rate of the Simultaneous Crushed Stone Sealing Layer Based on Machine Vision by Xin Rong, Honghai Liu, Xinmin Gao, Qinghua Bian

    Published 2022-01-01
    “…In this paper, a detection method of gravel coverage based on improved wavelet algorithm is proposed. By decomposing the image with two-dimensional discrete wavelet, the high-frequency and low-frequency coefficients are extracted. …”
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    Article
  16. 496

    Analysis of the Fractional-Order Delay Differential Equations by the Numerical Method by Saadia Masood, Muhammad Naeem, Roman Ullah, Saima Mustafa, Abdul Bariq

    Published 2022-01-01
    “…The obtained results have confirmed the greater accuracy than the modified Laguerre wavelet method, the Chebyshev wavelet method, and the modified wavelet-based algorithm. …”
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    Article
  17. 497

    Sparse Signal Representations of Bearing Fault Signals for Exhibiting Bearing Fault Features by Wei Peng, Dong Wang, Changqing Shen, Dongni Liu

    Published 2016-01-01
    “…Firstly, to enhance bearing fault signals, particle swarm optimization is introduced to tune the parameters of wavelet transform and the optimal wavelet transform is used for retaining one of the resonant frequency bands. …”
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    Article
  18. 498

    A Simple Hybrid Model for Short-Term Load Forecasting by Suseelatha Annamareddi, Sudheer Gopinathan, Bharathi Dora

    Published 2013-01-01
    “…The historical noisy load series data is decomposed into deterministic and fluctuation components using suitable wavelet coefficient thresholds and wavelet reconstruction method. …”
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    Article
  19. 499

    Adaptive Hierarchical Collocation Method for Solving Fractional Population Diffusion Model by Linqiang Yang, Yafei Liu, Hongmei Ma, Xue Liu, Shuli Mei

    Published 2023-01-01
    “…Comparatively, the method exhibits superior numerical performance to alternative wavelet spectral methods like the Shannon–Gabor wavelet.…”
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    Article
  20. 500

    -Advanced Models for Tsunami and Rogue Waves by D. W. Pravica, N. Randriampiry, M. J. Spurr

    Published 2012-01-01
    “…A wavelet , that satisfies the q-advanced differential equation for , is used to model N-wave oscillations observed in tsunamis. …”
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    Article