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Predictive machine health monitoring using deep convolution neural network for noisy vibration signal of rotating machine using empirical mode decomposition
Published 2025-03-01“…The study involves two types of spectrum representation (a) Short-time Fourier Transform (STFT)of raw original signal and (b) Hilbert Huang Transform (HHT) of Empirical mode decomposition-intrinsic mode function (EMD-IMFs) and two different datasets (i) CWRU Bearing dataset and (ii) Nasa Milling Dataset which is non-stationary. …”
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Algoritmo para el cálculo de la transformada Z inversa utilizando DERIVE // Algorithm for the calculation of the transformed inverse Z using the mathematical assistant DERIVE.
Published 2000-07-01“…</p><p>_______________________________________________________________________</p><p>Abstract<br />One of the mathematical tools more used in engineering in the study of the denominated systems of data control samples is<br />the transformed Z. The transformed Z like as an operational method can be used in the resolution of equations in finite<br />differences; which formulate the dynamics of the systems of data control samples. …”
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1663
A method of synthetic speech spoofing detection using constant Q modulation envelope
Published 2023-11-01“…In response to the low accuracy of synthetic speech spoofing detection based on traditional acoustic feature parameters, poor detection performance for unknown types of synthetic speech, and performance degradation in noisy environments, a method for detecting spoofing synthetic speech was proposed using constant Q modulation envelope (CQME) .The motivation of the method was from the fact that the temporal envelope of speech contained abundant information and there was a big difference in detail between the envelope of synthetic speech and genuine speech.The modulation envelope spectrum of speech was obtained by employing constant Q transform (CQT), and the root mean square of each frequency component was calculated to derive the CQME feature vector.And then the CQME feature vector was used to train the random forest classifier for discriminating genuine speech from spoofing synthetic speech.Experimental results demonstrate that the random forest trained with CQME features achieves high detection performance on the ASVspoof 2019 dataset and exhibites good detection efficacy for unknown types of synthetic speech.Furthermore, the proposed method shows high detection performance even under various noise conditions, having excellent noise robustness.…”
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A Comparative Study on Multiwavelet Construction Methods and Customized Multiwavelet Library for Mechanical Fault Detection
Published 2015-01-01“…Customized multiwavelet methods and practices have continued to improve over the recent years, focused on two-scale similarity transform (TST), lifting transform (LT), and lifting scheme (LS). …”
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1667
A motion compensation method for the single transmitter and multiple receivers mobile radar system
Published 2024-11-01“…First, the target points and clutter points with the same Doppler velocity are obtained by the radon Fourier transform method. Second, using the range/Doppler difference between clutter and target under multi‐radar views, the target and clutter points are separated by the spatial range mapping. …”
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1668
Straightness monitoring of scraper conveyor based on CUDA-accelerated dynamic programming and optimized panoramic stitching
Published 2025-01-01“…A homography matrix for image perspective transformation was calculated using the random sample consensus (RANSAC) algorithm. …”
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A Study on Instantaneous Time-Frequency Methods for Damage Detection of Nonlinear Moment-Resisting Frames
Published 2014-01-01“…First, several instantaneous time-frequency methods including Hilbert-Huang transform, direct quadrature, Teager energy operator, and higher-order energy operator are investigated as signal processing tools and the most appropriate method is selected using an outlier analysis. …”
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Analysis and Recognition Method of Internet Image Public Opinion Based on Partial Differential Equation
Published 2021-01-01“…This article comprehensively and systematically expounds the development trends and basic theory of partial differential methods, analyzes the characteristics of sampling multiscale transformation in detail, and deeply studies the network image denoising and network image restoration methods that perform partial differential diffusion in the pixel domain and the transform domain. …”
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Integrated morphophysiological, transcriptomic, and metabolomic data uncover the molecular mechanism of environmental adaptation of Zanthoxylum armatum with different latitudinal g...
Published 2025-07-01“…Zanthoxylum armatum is a widely distributed and economically important forest species in China that shows remarkable regional adaptability. However, adaptive differences under diverse environmental conditions and their molecular mechanisms have not been systematically studied.MethodsPlant materials of Z. armatum from three regions (Shandong, Chongqing, and Yunnan) representing different latitudinal backgrounds were cultivated under uniform conditions. …”
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Comparative analysis of Polylactic Acid/Bamboo biocomposites manufactured by Additive Manufacturing and Compression Moulding Methods
Published 2025-05-01“…The weight fraction of bamboo fibers was taken as 20 % for both the manufacturing methods. The filament and the biocomposites were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). …”
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CIRCULAR PUNCH INDENTATION INTO CONTINUOUSLY INHOMOGENEOUS THERMOELASTIC HALF-SPACE UNDER GIVEN CONSTANT TEMPERATURE AT ITS FLAT BOTTOM
Published 2014-03-01“…The earlier solution, obtained through the combined numerical and analytical ap proach (using Hankel integral transform and the modulating fun ction method) to the unmixed pro b lem on the arbitrary thermomechanical effect upon the inhomogeneous in depth thermoelastic half - space, is applied to solve the problem. …”
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Medical Image Hybrid Watermark Algorithm Based on Frequency Domain Processing and Inception v3
Published 2025-06-01“…Existing research has mostly focused on optimizing individual techniques, lacking comprehensive solutions that integrate the strengths of different methods. This article proposes a hybrid digital watermarking algorithm for medical images based on frequency domain transformation and deep learning convolutional neural networks. …”
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Effects of Ultrasound Treatment on Emulsifying Properties of Pea Protein Isolates Obtained from Four Different Pea Flour Varieties
Published 2025-05-01“…In conclusion, PPIs can be successfully extracted from different cultivars and applied as a natural emulsifier.…”
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The first integral method for the perturbed Wadati-Segur- Ablowitz equation with time dependent coefficient
Published 2015-12-01“…We obtained some different solutions by using Gauge transformationwith time dependent coefficient of variable transformations. …”
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Deterministic Calculation Method for Continuous-energy Neutron Transport Equation in No-resonance Energy-range
Published 2024-06-01“…Ultimately forming the coupling calculations between different energy ranges. Based on this foundation, the coupling calculation method between different energy segments in the non-resonant energy range was investigated, and an effective iterative calculation and numerical solution method was established. …”
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NEW BALANCE METHOD OF DRILLING RIG LOAD OF MULTIFUNCTIONAL DRILLING COMPREHENSIVE EXPERIMENT PLATFORM
Published 2015-01-01“…Then by the internal and external balance methods,the results were calculated and compared,and the different effects on the experiment platform performance were obtained. …”
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Methods for Detection, Extraction, Purification, and Characterization of Exopolysaccharides of Lactic Acid Bacteria—A Systematic Review
Published 2024-11-01“…In the present review, we discuss the different existing methods used for the detailed study of LAB-produced EPSs, which provide a comprehensive guide on LAB-EPS preparation, critically evaluating methods, addressing knowledge gaps and key challenges, and offering solutions to enhance reproducibility, scalability, and support for both research and industrial applications.…”
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