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1,492 Results Found

  • Article
  • Open Access
10 Citations
3,099 Views
12 Pages

A New Class of Iterative Processes for Solving Nonlinear Systems by Using One Divided Differences Operator

  • Alicia Cordero,
  • Cristina Jordán,
  • Esther Sanabria and
  • Juan R. Torregrosa

23 August 2019

In this manuscript, a new family of Jacobian-free iterative methods for solving nonlinear systems is presented. The fourth-order convergence for all the elements of the class is established, proving, in addition, that one element of this family has o...

  • Article
  • Open Access
3 Citations
2,237 Views
10 Pages

The technique of using the restricted convergence region is applied to study a semilocal convergence of the Newton–Kurchatov method. The analysis is provided under weak conditions for the derivatives and the first order divided differences. Con...

  • Article
  • Open Access
10 Citations
2,880 Views
9 Pages

Two-Step Solver for Nonlinear Equations

  • Ioannis K. Argyros,
  • Stepan Shakhno and
  • Halyna Yarmola

23 January 2019

In this paper we present a two-step solver for nonlinear equations with a nondifferentiable operator. This method is based on two methods of order of convergence 1 + 2 . We study the local and a semilocal convergence using weaker conditions...

  • Article
  • Open Access
22 Citations
3,450 Views
18 Pages

Convergence and Stability of a Parametric Class of Iterative Schemes for Solving Nonlinear Systems

  • Alicia Cordero,
  • Eva G. Villalba,
  • Juan R. Torregrosa and
  • Paula Triguero-Navarro

3 January 2021

A new parametric class of iterative schemes for solving nonlinear systems is designed. The third- or fourth-order convergence, depending on the values of the parameter being proven. The analysis of the dynamical behavior of this class in the context...

  • Article
  • Open Access
3 Citations
2,989 Views
11 Pages

21 April 2019

In this paper, we provide a formal proof of the existence of a polynomial solution of fixed degree for a second-order divided-difference equation of the hypergeometric type on non-uniform lattices, generalizing therefore previous work proving existen...

  • Article
  • Open Access
5 Citations
5,410 Views
11 Pages

Expanding the Applicability of a Third Order Newton-Type Method Free of Bilinear Operators

  • Sergio Amat,
  • Sonia Busquier,
  • Concepción Bermúdez and
  • Ángel Alberto Magreñán

21 August 2015

This paper is devoted to the semilocal convergence, using centered hypotheses, of a third order Newton-type method in a Banach space setting. The method is free of bilinear operators and then interesting for the solution of systems of equations. With...

  • Article
  • Open Access
10 Citations
5,591 Views
15 Pages

13 January 2022

As a critical component of the sugarcane harvester, the primary function of the crop dividers is to lift the lodged sugarcane (LS) and reduce the loss rate of the sugarcane harvest. In this study, a rigid-flexible coupling simulation method is propos...

  • Article
  • Open Access
1 Citations
1,579 Views
12 Pages

2 December 2022

The study of the microworld, quantum physics including the fundamental standard models are closely related to the basis of symmetry principles. These phenomena are reduced to solving nonlinear equations in suitable abstract spaces. Such equations are...

  • Feature Paper
  • Article
  • Open Access
2 Citations
3,313 Views
17 Pages

Two frequency divider architectures in the Folded MOS Current Mode Logic which allow to operate at ultra-low voltage thanks to forward body bias are presented, analyzed, and compared. The first considered architecture exploits nType and pType divide-...

  • Review
  • Open Access
2 Citations
6,762 Views
31 Pages

Low-Power Silicon-Based Frequency Dividers: An Overview

  • Alessandro Badiali and
  • Mattia Borgarino

Frequency divider circuits divide the frequency of an input signal by a specified ratio. They are critical components in analog, digital, and mixed-signal microelectronics. In power-constrained environments, such as cryogenic electronics or implanted...

  • Article
  • Open Access
7 Citations
4,967 Views
10 Pages

27 September 2022

In this work, compact extended ultra-wideband (UWB) Wilkinson power dividers (WPDs) using tapered transmission lines are analyzed, designed, and measured. Utilizing carefully designed tapered transmission sections results in widening the operational...

  • Article
  • Open Access
20 Citations
6,483 Views
21 Pages

As one of the key operators of automated map generalization, algorithms for the line simplification have been widely researched in the past decades. Although many of the currently available algorithms have revealed satisfactory simplification perform...

  • Article
  • Open Access
1 Citations
354 Views
29 Pages

17 December 2025

Under the context of non-dyadic human–machine interaction in intelligent coal mines, this study investigates the impact of different dyadic collaboration modes on Team Situation Awareness (TSA). Based on a simulated coal mine monitoring task, t...

  • Feature Paper
  • Article
  • Open Access
2,753 Views
17 Pages

Semilocal Convergence of a Multi-Step Parametric Family of Iterative Methods

  • Eva G. Villalba,
  • Eulalia Martínez and
  • Paula Triguero-Navarro

17 February 2023

In this paper, we deal with a new family of iterative methods for approximating the solution of nonlinear systems for non-differentiable operators. The novelty of this family is that it is a m-step generalization of the Steffensen-type method by upda...

  • Article
  • Open Access
22 Citations
6,152 Views
31 Pages

On Solutions of Holonomic Divided-Difference Equations on Nonuniform Lattices

  • Mama Foupouagnigni,
  • Wolfram Koepf,
  • Maurice Kenfack-Nangho and
  • Salifou Mboutngam

23 July 2013

The main aim of this paper is the development of suitable bases that enable the direct series representation of orthogonal polynomial systems on nonuniform lattices (quadratic lattices of a discrete or a q-discrete variable). We present two bases of...

  • Article
  • Open Access
3 Citations
6,305 Views
9 Pages

17 November 2020

This study aimed to compare the treatment outcomes and complications between operatively and nonoperatively treated medial epicondyle fractures with displacement of >5 mm as accurately measured on three-dimensional computed tomography (3D CT). We...

  • Article
  • Open Access
3 Citations
2,966 Views
19 Pages

15 June 2021

The efficiency of a skid-steer, all-wheel drive, multiple-axle vehicle with a hydrostatic drivetrain equipped with low-speed motors when it operates on soft terrain was studied. A flow divider enables a single pump to simultaneously power more than o...

  • Article
  • Open Access
2 Citations
1,960 Views
14 Pages

Fully Metallic Additively Manufactured Monopulse Horn Array Antenna in Ka-Band

  • José Rico-Fernández,
  • Álvaro F. Vaquero,
  • Marcos R. Pino and
  • Manuel Arrebola

28 November 2024

The Laser Powder-Bed Fusion Additive Manufacturing (LPBF AM) technique is evaluated for the manufacturing of fully metallic monolithic microwave components. To validate the manufacturing technique, a difference pattern array of 4 × 4 horn anten...

  • Article
  • Open Access
2,473 Views
18 Pages

29 November 2022

The present analysis is aimed at conducting node sensitivity analysis on the thermal–hydraulic performance of supercritical fluid in a three parallel channel configuration system. The heated channel was divided into different nodes and is exami...

  • Article
  • Open Access
2 Citations
853 Views
19 Pages

Some New Sobolev-Type Theorems for the Rough Riesz Potential Operator on Grand Variable Herz Spaces

  • Ghada AlNemer,
  • Ghada Ali Basendwah,
  • Babar Sultan and
  • Ioan-Lucian Popa

3 June 2025

In this paper, our first objective is to define the idea of grand variable Herz spaces. Then, our main goal is to prove boundedness results for operators, including the rough Riesz potential operator of variable order and the fractional Hardy operato...

  • Article
  • Open Access
4 Citations
1,895 Views
19 Pages

Asymptotically Newton-Type Methods without Inverses for Solving Equations

  • Ioannis K. Argyros,
  • Santhosh George,
  • Stepan Shakhno,
  • Samundra Regmi,
  • Mykhailo Havdiak and
  • Michael I. Argyros

2 April 2024

The implementation of Newton’s method for solving nonlinear equations in abstract domains requires the inversion of a linear operator at each step. Such an inversion may be computationally very expensive or impossible to find. That is why alter...

  • Article
  • Open Access
17 Citations
4,786 Views
18 Pages

The reasonable scheduling of agricultural machinery can avoid their purposeless flow during the operational service and reduce the scheduling cost of agricultural machinery service centers. In this research, a multiregional agricultural machinery sch...

  • Article
  • Open Access
1 Citations
3,283 Views
17 Pages

Impacts of Flight Operations on the Risk of Runway Excursions

  • Feiyin Wang,
  • Jintong Yuan,
  • Xiaochen Liu,
  • Pengtao Wang,
  • Mao Xu,
  • Xiaoyu Li and
  • Hang Li

23 January 2024

The Quick Access Recorder (QAR), as an onboard device used for monitoring and recording flight parameters, has been extensively installed on various types of aircraft. Recently, there has been a significant focus on studying the typical flight safety...

  • Article
  • Open Access
15 Citations
8,382 Views
17 Pages

14 December 2018

This paper describes a novel feed system for compact antipodal Vivaldi antenna arrays on a single layer of substrate integrated waveguide (SIW) by using SIW H-plane right-angled power dividers. The proposed antenna systems are composed of a Vivaldi a...

  • Article
  • Open Access
47 Citations
7,550 Views
16 Pages

Association of a CT-Based Clinical and Radiomics Score of Non-Small Cell Lung Cancer (NSCLC) with Lymph Node Status and Overall Survival

  • Francesca Botta,
  • Sara Raimondi,
  • Lisa Rinaldi,
  • Federica Bellerba,
  • Federica Corso,
  • Vincenzo Bagnardi,
  • Daniela Origgi,
  • Rocco Minelli,
  • Giovanna Pitoni and
  • Stefania Rizzo
  • + 5 authors

31 May 2020

Background: To evaluate whether a model based on radiomic and clinical features may be associated with lymph node (LN) status and overall survival (OS) in lung cancer (LC) patients; to evaluate whether CT reconstruction algorithms may influence the m...

  • Article
  • Open Access
2 Citations
1,452 Views
17 Pages

Symmetric-Type Multi-Step Difference Methods for Solving Nonlinear Equations

  • Ioannis K. Argyros,
  • Stepan Shakhno,
  • Samundra Regmi,
  • Halyna Yarmola and
  • Michael I. Argyros

8 March 2024

Symmetric-type methods (STM) without derivatives have been used extensively to solve nonlinear equations in various spaces. In particular, multi-step STMs of a higher order of convergence are very useful. By freezing the divided differences in the me...

  • Article
  • Open Access
8 Citations
2,764 Views
14 Pages

3 March 2024

With the widespread use of sector gates in tidal river locks, there is a growing interest in the operating force during the gate operation. This study investigates the characteristics of operating forces in a sector gate hydraulic cylinder system usi...

  • Review
  • Open Access
99 Citations
19,706 Views
25 Pages

An Extensive Review of Mobile Agricultural Robotics for Field Operations: Focus on Cotton Harvesting

  • Kadeghe G. Fue,
  • Wesley M. Porter,
  • Edward M. Barnes and
  • Glen C. Rains

In this review, we examine opportunities and challenges for 21st-century robotic agricultural cotton harvesting research and commercial development. The paper reviews opportunities present in the agricultural robotics industry, and a detailed analysi...

  • Article
  • Open Access
2 Citations
687 Views
14 Pages

Secondary System Status Assessment of Smart Substation Based on Multi-Model Fusion Ensemble Learning in Power System

  • Shidan Liu,
  • Ye Peng,
  • Wei Liu,
  • Yiquan Li,
  • Jiafu Cheng,
  • Liang Guo and
  • Guangshi Shao

24 June 2025

In order to accurately evaluate the operating status of secondary equipment in smart substations, this paper establishes a secondary equipment status evaluation index system and proposes a secondary equipment status evaluation method based on multi-m...

  • Article
  • Open Access
4 Citations
4,185 Views
14 Pages

The Effect of Pringle Maneuver Applied during Living Donor Hepatectomy on the Ischemia-Reperfusion Injury Observed in the Donors and Recipients

  • Yasin Dalda,
  • Sami Akbulut,
  • Tevfik Tolga Sahin,
  • Adem Tuncer,
  • Zeki Ogut,
  • Basri Satilmis,
  • Ozlem Dalda,
  • Mehmet Gul and
  • Sezai Yilmaz

18 April 2024

Background and Objectives: The aim of this study is to evaluate the clinical and laboratory changes of ischemia and reperfusion injury in the remnant livers of donors with and without Pringle maneuver. Furthermore, we evaluated the recipients who hav...

  • Article
  • Open Access
9 Citations
4,000 Views
13 Pages

18 January 2019

We study an iterative differential-difference method for solving nonlinear least squares problems, which uses, instead of the Jacobian, the sum of derivative of differentiable parts of operator and divided difference of nondifferentiable parts. Moreo...

  • Article
  • Open Access
54 Citations
17,587 Views
21 Pages

Assessing Environmental Impact Indicators in Road Construction Projects in Developing Countries

  • Mohamed Marzouk,
  • Eslam Mohammed Abdelkader,
  • Mohamed El-zayat and
  • Ahmed Aboushady

Environmental pollution is considered to be one of the main concerns in the construction industry. Environmental pollution has become a major challenge to construction projects due to the huge amount of pollution caused by construction projects. Ther...

  • Article
  • Open Access
3,722 Views
33 Pages

Quantum Circuit-Width Reduction through Parameterisation and Specialisation

  • Youssef Moawad,
  • Wim Vanderbauwhede and
  • René Steijl

5 May 2023

As quantum computing technology continues to develop, the need for research into novel quantum algorithms is growing. However, such algorithms cannot yet be reliably tested on actual quantum hardware, which is still limited in several ways, including...

  • Article
  • Open Access
9 Citations
5,241 Views
22 Pages

22 March 2019

This paper explores and presents the application of the Inductor–Diode and Inductor-Capacitor-Diode structures in a DC–DC step-down configuration for systems that require voltage adjustments. DC micro/picogrids are becoming more popular n...

  • Article
  • Open Access
8 Citations
2,635 Views
14 Pages

Influence of COVID-19 Pandemic on Colorectal Cancer Presentation, Management and Outcome during the COVID-19 Pandemic

  • B. M. Pirozzi,
  • L. Siragusa,
  • G. Baldini,
  • M. Pellicciaro,
  • M. Grande,
  • C. Efrati,
  • R. Finizio,
  • V. Formica,
  • G. Del Vecchio Blanco and
  • G. S. Sica

10 February 2023

The aim of the study was to investigate whether the COVID-19 pandemic and related measures had an influence on colorectal cancer (CRC) presentation, management, and outcomes; it was a retrospective monocentric study. CRC patients undergoing surgery d...

  • Article
  • Open Access
11 Citations
3,898 Views
16 Pages

In this paper, a novel direct torque control (DTC) scheme based on composite active vectors modulation (CVM) is proposed for permanent magnet synchronous motor (PMSM). The precondition of the accurate compensations of torque error and flux linkage er...

  • Article
  • Open Access
2 Citations
2,324 Views
14 Pages

5 July 2023

This paper proposes a feedback, rolling and adaptive operation decision-making mechanism for coupling and nesting of time scales. It is aimed at the change of time scale and the dynamics in the operation process, considering the relationship between...

  • Article
  • Open Access
11 Citations
4,016 Views
18 Pages

11 February 2022

This study investigates the effect of innovation on firm value at each stage of the firm life cycle (FLC): growth, mature and decline stages. Innovation involves improving the yield of input resources and creating new revenue sources. Thus, we define...

  • Review
  • Open Access
6 Citations
6,527 Views
30 Pages

A Systematic Review of 59 Field Robots for Agricultural Tasks: Applications, Trends, and Future Directions

  • Mattia Fontani,
  • Sofia Matilde Luglio,
  • Lorenzo Gagliardi,
  • Andrea Peruzzi,
  • Christian Frasconi,
  • Michele Raffaelli and
  • Marco Fontanelli

13 September 2025

Climate change and labour shortage are re-shaping farming methods. Agricultural tasks are often hard, tedious and repetitive for operators, and farms struggle to find specialized operators for such works. For this and other reasons (i.e., the increas...

  • Article
  • Open Access
3 Citations
2,600 Views
18 Pages

Modeling and Economic Operation of Energy Hub Considering Energy Market Price and Demand

  • Il-oh Kang,
  • Hyunseok You,
  • Kyungshik Choi,
  • Sung-kook Jeon,
  • Jaehee Lee and
  • Dongho Lee

10 February 2022

This paper discusses the economic operation strategy of the energy hub, which is being established in South Korea. The energy hub has five energy conversion devices: a turbo expander generator, a normal fuel cell, a fuel cell with a hydrogen outlet,...

  • Article
  • Open Access
9 Citations
2,186 Views
17 Pages

16 March 2023

As a new type of hydraulic system, the independent valve control system (IMCS) has higher flexibility compared with the traditional four-side slide valve control system. The independent metering control system (IMCS) is divided into four quadrant mod...

  • Article
  • Open Access
3 Citations
1,951 Views
17 Pages

11 September 2023

The primary frequency response scale is deteriorating in the modern power system due to the high penetration of different power devices. Frequency security assessments are essential for the operation or stability-checking of the power system. Firstly...

  • Article
  • Open Access
2 Citations
3,225 Views
26 Pages

An Algorithm Derivative-Free to Improve the Steffensen-Type Methods

  • Miguel A. Hernández-Verón,
  • Sonia Yadav,
  • Ángel Alberto Magreñán,
  • Eulalia Martínez and
  • Sukhjit Singh

21 December 2021

Solving equations of the form H(x)=0 is one of the most faced problem in mathematics and in other science fields such as chemistry or physics. This kind of equations cannot be solved without the use of iterative methods. The Steffensen-type methods,...

  • Article
  • Open Access
13 Citations
3,194 Views
11 Pages

Short-Term Precision and Repeatability of Radiofrequency Echographic Multi Spectrometry (REMS) on Lumbar Spine and Proximal Femur: An In Vivo Study

  • Carmelo Messina,
  • Salvatore Gitto,
  • Roberta Colombo,
  • Stefano Fusco,
  • Giada Guagliardo,
  • Mattia Piazza,
  • Jacopo Carlo Poli,
  • Domenico Albano and
  • Luca Maria Sconfienza

To determine the short-term intra-operator precision and inter-operator repeatability of radiofrequency echographic multi-spectrometry (REMS) at the lumbar spine (LS) and proximal femur (FEM). All patients underwent an ultrasound scan of the LS and F...

  • Article
  • Open Access
14 Citations
5,763 Views
16 Pages

Analysis and Mitigation of Stray Capacitance Effects in Resistive High-Voltage Dividers

  • Jordi-Roger Riba,
  • Francesca Capelli and
  • Manuel Moreno-Eguilaz

14 June 2019

This work analyzes the effects of the parasitic or stray distributed capacitance to ground in high-voltage environments and assesses the effectiveness of different corrective actions to minimize such effects. To this end, the stray capacitance of a 1...

  • Article
  • Open Access
4 Citations
3,647 Views
16 Pages

Electromagnetic Soil Characterization for Undergrounded RFID System Implementation

  • Ayman Elboushi,
  • Ahmed Telba,
  • Abdelrazik Sebak and
  • Khalid Jamil

This paper can be divided into two main parts. In the first part, an extensive experimental study for electromagnetic characteristic assessment of different soil samples is presented. In the second part of the paper, a practical verification of the o...

  • Article
  • Open Access
9 Citations
8,007 Views
16 Pages

Human Factors Analysis by Classifying Chemical Accidents into Operations

  • Esra Yalcin,
  • Gokcen Alev Ciftcioglu and
  • Burcin Hulya Guzel

17 May 2023

In the chemical industry, organizational and operational human factors significantly contribute to accidents. Chemical accidents occur in various operations of the industry due to a range of factors. Understanding the relationship between these facto...

  • Article
  • Open Access
19 Citations
6,675 Views
12 Pages

12 February 2020

The paper presents an experimental study on a lab scale hybrid moving bed biofilm reactor with intermittent aeration. Specifically, a comparison between two different operating conditions was analyzed: continuous and intermittent aeration. Both conti...

  • Article
  • Open Access
32 Citations
5,616 Views
14 Pages

Programming Robots by Demonstration Using Augmented Reality

  • Inês Soares,
  • Marcelo Petry and
  • António Paulo Moreira

6 September 2021

The world is living the fourth industrial revolution, marked by the increasing intelligence and automation of manufacturing systems. Nevertheless, there are types of tasks that are too complex or too expensive to be fully automated, it would be more...

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