22 papers · ranked by Valyu relevance
Melih C. Yesilli, Firas A. Khasawneh, A. Otto
The increasing availability of sensor data at machine tools makes automatic chatter detection algorithms a trending topic in metal cutting. Two prominent and advanced methods for feature extraction via signal decomposition are Wavelet Packet Transform (WPT) and Ensemble Empirical Mode Decomposition (EEMD). We apply…
Tiankai Sun, Xingyuan Wang, Kejun Zhang, Daihong Jiang + 5 more
'Xunguang Jv' 'Bin Ding' 'Weidong Zhu' 'Amelia Carolina Sparavigna'] The transmission of digital medical information is affected by data compression, noise, scaling, labeling, and other factors. At the same time, medical data may be illegally copied and maliciously tampered with without authorization. Therefore, the…
Shoucong Xiong, Hongdi Zhou, Shuai He, Leilei Zhang + 3 more
'Jianping Xuan' 'Tielin Shi'] Accidental failures of rotating machinery components such as rolling bearings may trigger the sudden breakdown of the whole manufacturing system, thus, fault diagnosis is vital in industry to avoid these massive economical costs and casualties. Since convolutional neural networks (CNN) are…
Jingchang Huang, Qianwei Zhou, Xin Zhang, Enliang Song + 2 more
'Xiaobing Yuan'] One of the most challenging problems in target classification is the extraction of a robust feature, which can effectively represent a specific type of targets. The use of seismic signals in unattended ground sensor (UGS) systems makes this problem more complicated, because the seismic target signal is…
Anh Cat Le Ngo, Kenneth Li-Minn Ang, Jasmine Kah-Phooi Seng, Guoping Qiu
'Guoping Qiu'] Both pixel-based scale saliency (PSS) and basis project methods focus on multiscale analysis of data content and structure. Their theoretical relations and practical combination are previously discussed. However, no models have ever been proposed for calculating scale saliency on basis-projected…
Amir Averbuch, Pekka Neittaanmäki, Valery A. Zheludev
The paper presents a versatile library of quasi-analytic complex-valued wavelet packets (WPs) which originate from polynomial splines of arbitrary orders. The real parts of the quasianalytic WPs are the regular spline-based orthonormal WPs designed in [1]. The imaginary parts are the so-called complementary orthonormal…
Mohd Younus Bhat, Aamir H. Dar, Didar Urynbassarova, Altyn Urynbassarova
'Altyn Urynbassarova'] 2 Department of Mathematical Sciences, Islamic University of Science and Technology Awantipora, Pulwama, Jammu and Kashmir 192122, India. E-mail: ahdkul740@gmail.com 3 School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China 4 Beijing Key Laboratory of…
Kuanfang He, Zixiong Xia, Yin Si, Qinghua Lu + 1 more
The acoustic emission (AE) signal collected by a sensor in the welding process has an overlapping frequency band and weak characteristics under a complex noise background. It is difficult for the wavelet noise reduction method, with single basis function, to effectively match the different characteristic information of…
Pushpa Mala Siddaraju, Devappa Jayadevappa, Kaliyamoorthy Ezhilarasan
Exchanging of medical data requires efficient authentication and protection of medical data that can be illegally modified. Watermarking plays an important role in protecting, sharing, and securing medical data. In this work, a robust nonblind medical image watermarking scheme is proposed. The process involves two…
Ching-Hsue Cheng, Wei-Xiang Liu
Population aging has become a worldwide phenomenon, which causes many serious problems. The medical issues related to degenerative brain disease have gradually become a concern. Magnetic Resonance Imaging is one of the most advanced methods for medical imaging and is especially suitable for brain scans. From the…
Rakhi Jadhav, Anurag Mahajan
Title: Highlights 1. • The proposed design has a better compression ratio. 2. • Low reconstruction error. 3. • This design is easy to access, systematic, profitable, and not time-consuming.
Lixin Gao, Zijing Yang, Ligang Cai, Huaqing Wang + 1 more
A nonlinear redundant lifting wavelet packet algorithm was put forward in this study. For the node signals to be decomposed in different layers, predicting operators and updating operators with different orders of vanishing moments were chosen to take norm lp of the scale coefficient and wavelet coefficient acquired…
Vasile V. Moca, Adriana Nagy-Dăbâcan, Harald Bârzan, Raul C. Mureşan
Time-frequency analysis is ubiquitous in many fields of science. Due to the Heisenberg-Gabor uncertainty principle, a single measurement cannot estimate precisely the localization of a finite oscillation in both time and frequency. Classical spectral estimators, like the short-time Fourier transform (STFT) or the…
Authors not listed
This report compares various simulation and data analysis methods for free induction decay (FID) signals in Nuclear Magnetic Resonance (NMR) Spectroscopy. The methods discussed include discrete fast Fourier transformation (FFT), least squares fitting (LSF), short-time Fourier transformation (STFT), and wavelet…
Jean Gaudart, Stanislas Rebaudet, Gaetan Texier, Robert Barrais + 2 more
The aim of the present study was to develop a method for multiscale analysis of non-stationary and non-periodic epidemic time series. Indeed, the epidemiologists may need to know the features, at different resolutions, of short duration outbreaks that did not exhibit periodic cycles. Among of the large number of…
Zenia Motiwala, Anand S. Sandholu, Durba Sengupta, Kiran Kulkarni
Ras superfamily GTPases are molecular switches which regulate critical cellular processes. Extensive structural and computational studies on this G protein family have tried to establish a general framework for their switching mechanism. The current understanding of the mechanism is that two loops, Switch I and Switch…
Niraj Shakhakarmi
Mutiscale analysis represents multiresolution scrutiny of a signal to improve its signal quality. Multiresolution analysis of 1D voice signal and 2D image is conducted using DCT, FFT and different wavelets such as Haar, Deubachies, Morlet, Cauchy, Shannon, Biorthogonal, Symmlet and Coiflet deploying the cascaded filter…
Hassan Mohamed Muhi-Aldeen, Asma Abdulelah Abdulrahman, Jabbar Abed Eleiwy, Fouad Shaker Tahir + 1 more
'Jabbar Abed Eleiwy' 'Fouad Shaker Tahir' 'Yurii Khlaponin'] Hassan Mohamed Muhi-Aldeen Department of Computer Engineering Aliraqia University 22Sabaabkar, Adamia, Baghdad, Iraq muhialdeen.hassan@aliraqia.edu.iq https://orcid.org/0000-0002-9177-8621 Asma A. Abdulrahman Department of Applied Sciences University of…
Authors not listed
Purpose: The transmission Fourier-transform infrared (FTIR) spectrum contains complexed signals for molecular structures and intermolecular interactions. Their interrelated signals were attempted to be recognized using the singular value decomposition (SVD) procedure. Methods: Cimetidine (CIM) and indomethacin (INM)…
Authors not listed
A protocol for generating potential energy surfaces and performing photoinduced nonadiabatic multidimensional wave packet propagation is presented. The workflow starts with the parameterization of a linear vibronic coupling (LVC) Hamiltonian using the BSE@GW approach. In a second step, the LVC model is used as input…
William Denault, Håkon K. Gjessing, Julius Juodakis, Bo Jacobsson + 1 more
We present here an alternative method for genome-wide association study (GWAS) that is more powerful than traditional GWAS methods for locus detection. Single-variant GWAS methods incur a substantial multiple-testing burden because of the vast number of single nucleotide polymorphisms (SNPs) being tested…
Huanqiu Zhang, Israel Nelken, Tatyana Sharpee
Deciphering the neural code requires identifying its fundamental symbols or code-words. Neural activity is usually interpreted either as a rate code – based on average spike counts – or as a temporal code, which distinguishes patterns with identical counts. Yet, the symbols of the code remain undefined. Here we show…