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1,338 Results Found

  • Article
  • Open Access
47 Citations
8,919 Views
26 Pages

Hyperspectral imagery provides detailed spectral information that can be used for tree species discrimination. The aim of this study is to assess spectral–spatial complexity reduction techniques for tree species classification using an airborne...

(This article belongs to the Special Issue GEOBIA in a Changing World)
  • Article
  • Open Access
6 Citations
954 Views
14 Pages

Microsaccade Characterization Using the Continuous Wavelet Transform and Principal Component Analysis

  • Mario Bettenbühl,
  • Claudia Paladini,
  • Konstantin Mergenthaler,
  • Reinhold Kliegl,
  • Ralf Engbert and
  • Matthias Holschneider

30 October 2010

During visual fixation on a target, humans perform miniature (or fixational) eye movements consisting of three components, i.e., tremor, drift, and microsaccades. Microsaccades are high velocity components with small amplitudes within fixational eye...

  • Feature Paper
  • Article
  • Open Access
79 Citations
7,698 Views
32 Pages

1 September 2020

In response to the high demand of the operation reliability and predictive maintenance, health monitoring and fault diagnosis and classification have been paramount for complex industrial systems (e.g., wind turbine energy systems). In this study, da...

(This article belongs to the Special Issue Advances in Condition Monitoring, Optimization and Control for Complex Industrial Processes)
  • Article
  • Open Access
16 Citations
2,784 Views
11 Pages

Online Evaluation for the Accuracy of Electronic Voltage Transformer Based on Recursive Principal Components Analysis

  • Zhenhua Li,
  • Yangang Zheng,
  • Ahmed Abu-Siada,
  • Mengyao Lu,
  • Hongbin Li and
  • Yanchun Xu

25 October 2020

The electronic voltage transformer (EVT) has received much attention with the recent global trend to establish smart grids and digital substations. One of the main issues of the EVT is the deterioration of its performance with long-term operation whi...

(This article belongs to the Section F: Electrical Engineering)
  • Article
  • Open Access
2 Citations
591 Views
16 Pages

23 June 2026

Reliable diagnosis of incipient transformer faults is essential for preventing catastrophic failures and enabling predictive asset management in power systems. Although dissolved gas analysis (DGA) is the most established diagnostic tool for assessin...

(This article belongs to the Special Issue Fault Diagnosis and Simulations for Power Transformers, Converter Transformers, and High-Frequency Transformers)
  • Article
  • Open Access
23 Citations
4,492 Views
16 Pages

17 August 2022

The Heilongjiang Duobaoshan area is located at the confluence of the Great Xing’an Range and the Lesser Xing’an Range, and the area has undergone a complex magmatic and tectonic evolutionary history resulting in a complex and diverse geol...

(This article belongs to the Special Issue Genesis and Metallogeny of Non-ferrous and Precious Metal Deposits)
  • Article
  • Open Access
63 Citations
7,208 Views
19 Pages

Rolling Bearing Fault Diagnosis Based on an Improved HTT Transform

  • Bin Pang,
  • Guiji Tang,
  • Tian Tian and
  • Chong Zhou

14 April 2018

When rolling bearing failure occurs, vibration signals generally contain different signal components, such as impulsive fault feature signals, background noise and harmonic interference signals. One of the most challenging aspects of rolling bearing...

  • Article
  • Open Access
47 Citations
16,418 Views
15 Pages

13 January 2015

Predicting the future climate and its impacts on the global environment is model based, presenting a level of uncertainty. Alternative robust approaches of analyzing high volume climate data to reveal underlying regional and local trends are increasi...

(This article belongs to the Special Issue Regional Climate Modeling: Advances, Constraints and Use for Adaptation Planning)
  • Article
  • Open Access
10 Citations
3,715 Views
14 Pages

20 January 2023

Spatial and spectral information are essential sources of information in remote sensing applications, and the fusion of panchromatic and multispectral images effectively combines the advantages of both. Due to the existence of two main classes of fus...

(This article belongs to the Special Issue Recent Advances in Image Processing)
  • Article
  • Open Access
15 Citations
3,726 Views
30 Pages

1 May 2024

In this article, the main problem under investigation is the detection and diagnosis of short-circuit faults in power transmission lines. The proposed fault detection (FDD) approach is mainly based on principal component analysis (PCA). The proposed...

(This article belongs to the Section F: Electrical Engineering)
  • Article
  • Open Access
534 Views
21 Pages

22 June 2026

Partial discharge (PD) is a key indicator of insulation degradation in high-voltage transformers and can provide early warning of incipient failure. Although artificial neural networks (ANNs) have been applied to PD classification, their performance...

(This article belongs to the Special Issue Condition Monitoring and Fault Diagnosis)
  • Article
  • Open Access
16 Citations
5,054 Views
19 Pages

13 December 2022

Environmental changes and human activities have caused serious degradation of murals around the world. Scratches are one of the most common issues in these damaged murals. We propose a new method for virtually enhancing and removing scratches from mu...

(This article belongs to the Special Issue Sensors for Imaging Cultural Heritage: Technologies, Methods and Data Processing)
  • Article
  • Open Access
14 Citations
3,354 Views
8 Pages

5 November 2018

In a smart grid, many transformers are equipped for both power transmission and conversion. Because a stable operation of transformers is essential to maintain grid security, studying the fault diagnosis method of transformers can improve both fault...

(This article belongs to the Special Issue Optimization Methods Applied to Power Systems)
  • Article
  • Open Access
4 Citations
2,200 Views
12 Pages

Multi-Component Temporal-Correlation Seismic Data Compression Algorithm Based on the PCA and DWT

  • Mateus Martinez de Lucena,
  • Josafat Leal Ribeiro,
  • Matheus Wagner and
  • Antônio Augusto Fröhlich

9 January 2025

Industrial application data acquisition systems can be sources of vast amounts of data. The seismic surveys conducted by oil and gas companies result in enormous datasets, often exceeding terabytes of data. The storage and communication demands these...

(This article belongs to the Section Algorithms for Multidisciplinary Applications)
  • Article
  • Open Access
Int. J. Financ. Stud.2026, 14(10), 274;https://doi.org/10.3390/ijfs14100274 
(registering DOI)

15 October 2026

This article examines whether global value added is better explained by territorial scale, sectoral specialization, time, or the configuration that emerges when specific sectors are embedded in specific economies. Using the OECD Trade in Value Added...

(This article belongs to the Special Issue Supply Chain Uncertainties and Financial Outcomes)
  • Article
  • Open Access
1 Citations
1,052 Views
21 Pages

A Transformer-Based Semantic Encoding Framework for Quantitative Analysis of Large-Scale Textual Reviews

  • Darjan Karabašević,
  • Aleksandra Vujko,
  • Vuk Mirčetić,
  • Gabrijela Popović and
  • Dragiša Stanujkić

28 February 2026

Increasing turbulence in contemporary business environments has made the quantitative analysis of unstructured textual data a central methodological challenge for researchers and decision-makers. The increasing availability of large-scale textual dat...

  • Article
  • Open Access
6 Citations
4,703 Views
30 Pages

2 June 2021

The original Hyperspectral image (HSI) has different degrees of Hughes phenomenon and mixed noise, leading to the decline of classification accuracy. To make full use of the spatial-spectral joint information of HSI and improve the classification acc...

(This article belongs to the Special Issue Recent Advances in Multi- and Hyperspectral Image Analysis)
  • Article
  • Open Access
11 Citations
4,685 Views
15 Pages

Data-Driven Prediction Model for Analysis of Sensor Data

  • Ognyan Yotov and
  • Adelina Aleksieva-Petrova

In view of Industry 4.0, data generation and analysis are challenges. For example, machine health monitoring and remaining useful life prediction use sensor signals, which are difficult to analyze using traditional methods and mathematical techniques...

(This article belongs to the Special Issue Advanced Technologies and Applications in Computer Science and Engineering)
  • Article
  • Open Access
24 Citations
6,890 Views
13 Pages

8 April 2018

The huge quantity of information and the high spectral resolution of hyperspectral imagery present a challenge when performing traditional processing techniques such as classification. Dimensionality and noise reduction improves both efficiency and a...

(This article belongs to the Special Issue Advances in Remote Sensing of Land-Cover and Land-Use Changes)
  • Article
  • Open Access
3 Citations
2,135 Views
19 Pages

This research investigates how business model changes induced by digital transformation impact productivity within the maritime transport sector in Croatia. Given the limited existing literature addressing digital transformation’s productivity...

(This article belongs to the Special Issue Sustainable Maritime Transport and Port Intelligence)
  • Article
  • Open Access
6 Citations
2,855 Views
19 Pages

Renal Cell Carcinoma Discrimination through Attenuated Total Reflection Fourier Transform Infrared Spectroscopy of Dried Human Urine and Machine Learning Techniques

  • Bogdan Adrian Buhas,
  • Lucia Ana-Maria Muntean,
  • Guillaume Ploussard,
  • Bogdan Ovidiu Feciche,
  • Iulia Andras,
  • Valentin Toma,
  • Teodor Andrei Maghiar,
  • Nicolae Crișan,
  • Rareș-Ionuț Știufiuc and
  • Constantin Mihai Lucaciu

11 September 2024

Renal cell carcinoma (RCC) is the sixth most common cancer in men and is often asymptomatic, leading to incidental detection in advanced disease stages that are associated with aggressive histology and poorer outcomes. Various cancer biomarkers are f...

(This article belongs to the Special Issue Machine Learning in Disease Diagnosis and Treatment)
  • Article
  • Open Access
18 Citations
3,703 Views
28 Pages

Improved Procedure for Multi-Focus Images Using Image Fusion with qshiftN DTCWT and MPCA in Laplacian Pyramid Domain

  • Chinnem Rama Mohan,
  • Kuldeep Chouhan,
  • Ranjeet Kumar Rout,
  • Kshira Sagar Sahoo,
  • Noor Zaman Jhanjhi,
  • Ashraf Osman Ibrahim and
  • Abdelzahir Abdelmaboud

22 September 2022

Multi-focus image fusion (MIF) uses fusion rules to combine two or more images of the same scene with various focus values into a fully focused image. An all-in-focus image refers to a fully focused image that is more informative and useful for visua...

(This article belongs to the Special Issue Intelligent Systems Applications to Multiple Domains Based on Innovative Signal and Image Processing)
  • Article
  • Open Access
9 Citations
2,834 Views
17 Pages

Clustering-Based Classification of Polygonal Wheels in a Railway Freight Vehicle Using a Wayside System

  • António Guedes,
  • Rúben Silva,
  • Diogo Ribeiro,
  • Jorge Magalhães,
  • Tomás Jorge,
  • Cecília Vale,
  • Andreia Meixedo,
  • Araliya Mosleh and
  • Pedro Montenegro

25 April 2024

Polygonal wheels are one of the most common defects in train wheels, causing a reduction in comfort levels for passengers and a higher degradation of vehicle and track components. With the aim of contributing to the safety and reliability of railway...

(This article belongs to the Section Civil Engineering)
  • Article
  • Open Access
99 Citations
6,352 Views
21 Pages

25 September 2023

A hybrid deep learning approach was designed that combines deep learning with enhanced short-time Fourier transform (STFT) spectrograms and continuous wavelet transform (CWT) scalograms for pipeline leak detection. Such detection plays a crucial role...

(This article belongs to the Special Issue Advanced Sensing and Evaluating Technology in Nondestructive Testing)
  • Article
  • Open Access
1 Citations
1,171 Views
19 Pages

The proposed study explores the consistency of the geometrical character of surfaces under scaling, rotation and translation. In addition to its mathematical significance, it also exhibits advantages over image processing and economic applications. I...

  • Letter
  • Open Access
6 Citations
2,651 Views
13 Pages

New Proposal for Inverse Algorithm Enhancing Noise Robust Eddy-Current Non-Destructive Evaluation

  • Milan Smetana,
  • Lukas Behun,
  • Daniela Gombarska and
  • Ladislav Janousek

28 September 2020

Solution of inverse problem in eddy-current non-destructive evaluation of material defects is concerned in this study. A new inverse algorithm incorporating three methods is proposed. The wavelet transform of sensed eddy-current responses complemente...

(This article belongs to the Special Issue Advances in Sensors and Sensing for Technical Condition Assessment and NDT)
  • Article
  • Open Access
43 Citations
5,138 Views
14 Pages

14 January 2021

Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS), versus attenuated total reflectance spectroscopy (FTIR-ATR) and diffuse reflectance spectroscopy (DRIFT), was firstly applied in quick assessment of rice quality in response to rising...

(This article belongs to the Section Grain)
  • Article
  • Open Access
45 Citations
7,810 Views
10 Pages

Detection of Left-Sided and Right-Sided Hearing Loss via Fractional Fourier Transform

  • Shuihua Wang,
  • Ming Yang,
  • Yin Zhang,
  • Jianwu Li,
  • Ling Zou,
  • Siyuan Lu,
  • Bin Liu,
  • Jiquan Yang and
  • Yudong Zhang

19 May 2016

In order to detect hearing loss more efficiently and accurately, this study proposed a new method based on fractional Fourier transform (FRFT). Three-dimensional volumetric magnetic resonance images were obtained from 15 patients with left-sided hear...

(This article belongs to the Special Issue Wavelets, Fractals and Information Theory II)
  • Article
  • Open Access
93 Citations
10,299 Views
25 Pages

Mapping Irrigated Areas Using Sentinel-1 Time Series in Catalonia, Spain

  • Hassan Bazzi,
  • Nicolas Baghdadi,
  • Dino Ienco,
  • Mohammad El Hajj,
  • Mehrez Zribi,
  • Hatem Belhouchette,
  • Maria Jose Escorihuela and
  • Valérie Demarez

6 August 2019

Mapping irrigated plots is essential for better water resource management. Today, the free and open access Sentinel-1 (S1) and Sentinel-2 (S2) data with high revisit time offers a powerful tool for irrigation mapping at plot scale. Up to date, few st...

  • Article
  • Open Access
11 Citations
4,110 Views
32 Pages

21 August 2025

The aim of the study was to evaluate the digital business transformation across EU countries and its relationship with key Sustainable Development Goals (SDGs): SDG 8 (Decent Work and Economic Growth), SDG 9 (Industry, Innovation, and Infrastructure)...

(This article belongs to the Special Issue Sustainable Business Models and Digital Transformation)
  • Technical Note
  • Open Access
3 Citations
2,614 Views
10 Pages

Mitigation of Calibration Ringing in the Context of the MTG-S IRS Instrument

  • Pierre Dussarrat,
  • Guillaume Deschamps,
  • Bertrand Theodore,
  • Dorothee Coppens,
  • Carsten Standfuss and
  • Bernard Tournier

31 May 2023

EUMETSAT is currently developing the on-ground processing chain of the infrared sounders (IRS) on-board the Meteosat third-generation sounding satellites (MTG-S). In this context, the authors investigated the impact of a particular type of radiometri...

(This article belongs to the Special Issue Remote Sensing Calibration and Validation in Sounding Atmosphere and Ionosphere)
  • Article
  • Open Access
477 Views
50 Pages

Seismic Event Detection in the Valencian Community Seismic Network Using the Wavelet Scattering Transform, PCA, and SVM: A Robust Lightweight Alternative to Deep Learning for Local Seismic Networks

  • Alejandro Perdomo-Campos,
  • Juan José Galiana-Merino,
  • Jorge Ramírez-Beltrán,
  • Boualem Youcef Nassim Benabdeloued and
  • Juan Luis Soler-Llorens

20 August 2026

Southeastern Spain is a region of moderate-to-high seismic risk, where reliable seismic event detection is a prerequisite for earthquake early warning systems. This paper presents a seismic event detection pipeline based on the Wavelet Scattering Tra...

(This article belongs to the Special Issue Application of Data Processing in Earthquake Science)
  • Article
  • Open Access
18 Citations
4,972 Views
11 Pages

Atomic and Molecular Laser-Induced Breakdown Spectroscopy of Selected Pharmaceuticals

  • Pravin Kumar Tiwari,
  • Nilesh Kumar Rai,
  • Rohit Kumar,
  • Christian G. Parigger and
  • Awadhesh Kumar Rai

19 July 2019

Laser-induced breakdown spectroscopy (LIBS) of pharmaceutical drugs that contain paracetamol was investigated in air and argon atmospheres. The characteristic neutral and ionic spectral lines of various elements and molecular signatures of CN violet...

(This article belongs to the Special Issue Laser Plasma Spectroscopy Applications)
  • Article
  • Open Access
232 Views
26 Pages

PCA–Mahalanobis Anomaly Detection in CZT Gamma Spectra

  • Konstantinos Karafasoulis and
  • Aristoteles Kyriakis

Reliable detection of radioactive sources in gamma-ray spectra is important for nuclear security, environmental monitoring, and radiation protection. This work presents an experimental proof-of-concept anomaly-detection approach for low-count cadmium...

  • Article
  • Open Access
34 Citations
6,218 Views
28 Pages

19 June 2021

This paper presents a new content-based image retrieval (CBIR) method based on image feature fusion. The deep features are extracted from object-centric and place-centric deep networks. The discrete cosine transform (DCT) solves the strong correlatio...

(This article belongs to the Topic Applied Computer Vision and Pattern Recognition)
  • Article
  • Open Access
20 Citations
3,350 Views
16 Pages

Multiscale Monitoring Using Machine Learning Methods: New Methodology and an Industrial Application to a Photovoltaic System

  • Hanen Chaouch,
  • Samia Charfeddine,
  • Sondess Ben Aoun,
  • Houssem Jerbi and
  • Víctor Leiva

10 March 2022

In this study, a multiscale monitoring method for nonlinear processes was developed. We introduced a machine learning tool for fault detection and isolation based on the kernel principal component analysis (PCA) and discrete wavelet transform. The pr...

(This article belongs to the Special Issue Statistical Simulation and Computation II)
  • Article
  • Open Access
851 Views
21 Pages

1 January 2026

Reliability assessment of conical shells in the chemical industry commonly relies on point cloud registration. Thus, accurate edge detection from 3D laser scan data is crucial for high-precision registration. However, existing edge detection methods...

(This article belongs to the Section Manufacturing Processes and Systems)
  • Article
  • Open Access
40 Citations
6,960 Views
14 Pages

12 November 2016

The aging of oil-paper insulation in power transformers may cause serious power failures. Thus, effective monitoring of the condition of the transformer insulation is the key to prevent major accidents. The purpose of this study was to explore the fe...

(This article belongs to the Special Issue Power Transformer Diagnostics, Monitoring and Design Features)
  • Article
  • Open Access
478 Views
17 Pages

7 May 2026

This study addresses the problem of incipient fault detection in industrial processes by developing an enhanced dynamic inner principal component analysis (DiPCA) framework. This framework integrates a Transformer attention mechanism and a masked lin...

(This article belongs to the Section Process Control, Modeling and Optimization)
  • Article
  • Open Access
399 Views
30 Pages

6 August 2026

Romanian agricultural landscapes have undergone substantial transformation between 2000 and 2024, driven by agricultural modernization, market integration, and uneven regional development. This study assesses the opportunities and risks associated wi...

(This article belongs to the Special Issue Opportunities and Risks for Agriculture and the Environment at Landscape Scales)
  • Article
  • Open Access
23 Citations
5,355 Views
14 Pages

Detection of Lethal Bronzing Disease in Cabbage Palms (Sabal palmetto) Using a Low-Cost Electronic Nose

  • Martin J. Oates,
  • Nawaf Abu-Khalaf,
  • Carlos Molina-Cabrera,
  • Antonio Ruiz-Canales,
  • Jose Ramos and
  • Brian W. Bahder

23 November 2020

Lethal Bronzing Disease (LB) is a disease of palms caused by the 16SrIV-D phytoplasma. A low-cost electronic nose (eNose) prototype was trialed for its detection. It includes an array of eight Taguchi-type (MQ) sensors (MQ135, MQ2, MQ3, MQ4, MQ5, MQ9...

(This article belongs to the Section Biosensors and Healthcare)
  • Article
  • Open Access
37 Citations
9,159 Views
14 Pages

30 March 2016

Parkinson’s disease (PD) is a progressive and chronic nervous system disease that impairs the ability of speech, gait, and complex muscle-and-nerve actions. Early diagnosis of PD is quite important for alleviating the symptoms. Cost effective and con...

(This article belongs to the Special Issue Computational Complexity)
  • Article
  • Open Access
13 Citations
4,443 Views
27 Pages

11 April 2025

Lithological mapping using satellite images, particularly hyperspectral data, helps in effectively defining the best initial targets for regional exploration. In this study, ZY1-02D hyperspectral image (HSI) data with moderate spectral and very high...

(This article belongs to the Section Remote Sensing Image Processing)
  • Article
  • Open Access
13 Citations
8,369 Views
24 Pages

Inclusive growth is increasingly recognized as being critical to sustainable development, particularly in the context of rising income inequality and social polarization around the globe. Effective policy requires robust measurement, prompting the ne...

(This article belongs to the Section Financial Markets)
  • Article
  • Open Access
101 Citations
8,769 Views
13 Pages

22 June 2017

With cotton fiber growth or maturation, cellulose content in cotton fibers markedly increases. Traditional chemical methods have been developed to determine cellulose content, but it is time-consuming and labor-intensive, mostly owing to the slow hyd...

(This article belongs to the Section Chemical Sensors)
  • Article
  • Open Access
1,578 Views
17 Pages

Studies on the Authorship of Albumen Vintage Photographs: A Combined Experimental and Chemometric Approach

  • Monika Adamowska,
  • Izabela Zając,
  • Marek Grzegorz Sawicki and
  • Wojciech Hyk

The differences in albumen photographs from vintage photographic studios were identified by energy-dispersive X-ray fluorescence spectroscopy and Fourier transform infrared spectroscopy. The results inspired the concept of finding common features cha...

(This article belongs to the Section Photochemistry)
  • Article
  • Open Access
36 Citations
5,180 Views
18 Pages

13 February 2022

Energy demand has grown explosively in recent years, leading to increased attention of energy efficiency (EE) research. Demand response (DR) programs were designed to help power management entities meet energy balance and change end-user electricity...

(This article belongs to the Topic Artificial Intelligence and Sustainable Energy Systems)
  • Article
  • Open Access
278 Views
81 Pages

13 August 2026

We introduce a robust nonparametric regression framework for functional covariates that combines functional principal component analysis (FPCA), marginal copula-scale normalization, bounded-score M-estimation, and multivariate Bernstein smoothing. Th...

(This article belongs to the Section D1: Probability and Statistics)
  • Article
  • Open Access
2 Citations
484 Views
30 Pages

11 June 2026

Accurate fault diagnosis of power transformers using Dissolved Gas Analysis (DGA) depends on effective feature extraction to reduce redundancy and improve classification performance. This study compares linear and nonlinear feature extraction methods...

(This article belongs to the Special Issue Artificial Intelligence and Its Application in Condition Monitoring and Evaluation of Power Equipment)
  • Article
  • Open Access
8 Citations
2,643 Views
20 Pages

Improved Bayesian Model Updating Method for Frequency Response Function with Metrics Utilizing NHBFT-PCA

  • Jinhui Li,
  • Zhenhong Deng,
  • Yong Tang,
  • Siqi Wang,
  • Zhe Yang,
  • Huageng Luo,
  • Wujun Feng and
  • Baoqiang Zhang

2 July 2024

To establish a high-fidelity model of engineering structures, this paper introduces an improved Bayesian model updating method for stochastic dynamic models based on frequency response functions (FRFs). A novel validation metric is proposed first wit...

(This article belongs to the Section E: Applied Mathematics)

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