Skip to Content
You are currently on the new version of our website. Access the old version .

1,345 Results Found

  • Article
  • Open Access
18 Citations
4,329 Views
23 Pages

Fractional integration operational matrix of Chebyshev wavelets based on the Riemann–Liouville fractional integral operator is derived directly from Chebyshev wavelets for the first time. The formulation is accurate and can be applied for fract...

  • Article
  • Open Access
13 Citations
6,954 Views
26 Pages

In this paper, we consider numerical solutions for a general form of fractional delay differential equations (FDDEs) with fractional derivatives defined in the Caputo sense. A fractional integration operational matrix, created using a fractional Tayl...

(This article belongs to the Special Issue Numerical and Analytical Methods for Differential Equations and Systems)
  • Article
  • Open Access
7 Citations
1,005 Views
19 Pages

In this article, we investigate a nonlinear ψ-Hilfer fractional order Volterra integro-delay differential equation (ψ-Hilfer FRVIDDE) and a nonlinear ψ-Hilfer fractional Volterra delay integral equation (ψ-Hilfer FRVDIE), both of whic...

(This article belongs to the Special Issue Fractional Systems, Integrals and Derivatives: Theory and Application)
  • Article
  • Open Access
2,488 Views
8 Pages

21 September 2021

The paper deals with a Volterra integral equation with delay. In order to apply the w-weak generalized contraction theorem for the study of existence and uniqueness of solutions, we rewrite the equation as a fixed point problem. The assumptions take...

(This article belongs to the Section C1: Difference and Differential Equations)
  • Article
  • Open Access
524 Views
26 Pages

5 August 2026

This study presents a comprehensive global accuracy assessment of the medium-range (up to 15 days) forecast pressure-level data generated by the physics-based Integrated Forecast System (IFS) and the newly operational, data-driven Artificial Intellig...

(This article belongs to the Special Issue Satellite Geodesy and Earth System Monitoring)
  • Article
  • Open Access
840 Views
38 Pages

Last-mile delivery systems are under greater pressure to deliver cost-efficient, reliable, environmentally friendly, and resilient services amid operational challenges. Distance/cost is the usual optimization criterion for traditional vehicle routing...

  • Article
  • Open Access
7 Citations
3,404 Views
15 Pages

Comparing Hot and Cold Loading in an Integrated Biomass Recovery Operation

  • Anil Raj Kizha,
  • Han-Sup Han,
  • Nathaniel Anderson,
  • Anil Koirala and
  • Libin T. Louis

28 March 2020

The balance of production activities at the landing is pivotal to the success of any forest harvesting operation and has a direct impact on the cost and efficiency of the enterprise. The primary objective of this study was to understand the operation...

(This article belongs to the Special Issue Forest Operations in Environmentally Sensitive Areas)
  • Article
  • Open Access
2 Citations
2,082 Views
16 Pages

7 October 2022

This paper proposes a new numerical method for solving single time-delayed stochastic differential equations via orthogonal functions. The basic principles of the technique are presented. The new method is applied to approximate two kinds of stochast...

(This article belongs to the Special Issue Differential/Difference Equations and Its Application)
  • Article
  • Open Access
6 Citations
3,088 Views
12 Pages

11 April 2019

The purpose of this paper is to study the nonlinear distributed delay differential equations with impulses effects in the vectorial regulated Banach spaces R ( [ − r , 0 ] , R n ) . The existence of the periodic solution of impulsiv...

(This article belongs to the Special Issue Integral Transformations, Operational Calculus and Their Applications)
  • Article
  • Open Access
10 Citations
2,190 Views
18 Pages

Solvability of a State–Dependence Functional Integro-Differential Inclusion with Delay Nonlocal Condition

  • Taher S. Hassan,
  • Reda Gamal Ahmed,
  • Ahmed M. A. El-Sayed,
  • Rami Ahmad El-Nabulsi and ,
  • Osama Moaaz and
  • Mouataz Billah Mesmouli
  • + 1 author+ 0 author

11 July 2022

There is great focus on phenomena that depend on their past history or their past state. The mathematical models of these phenomena can be described by differential equations of a self-referred type. This paper is devoted to studying the solvability...

(This article belongs to the Special Issue Orthogonal Polynomials and Special Functions)
  • Article
  • Open Access
1,477 Views
12 Pages

21 August 2024

We study certain Volterra integral equations that extend and recover first order ordinary differential equations (ODEs). We formulate the former equations from the latter by replacing classical derivatives with nonlocal integral operators with anti-s...

(This article belongs to the Special Issue Difference, Functional, and Related Equations)
  • Article
  • Open Access
747 Views
29 Pages

16 January 2026

In this contribution, we propose and study long-time behaviors of a new class of N-dimensional delayed Kirchhoff–Carrier-type problems with variable transfer coefficients involving a logarithmic nonlinearity. We take into account the dependence...

(This article belongs to the Section B: Mathematics)
  • Article
  • Open Access
3 Citations
1,969 Views
51 Pages

This study proposes an integrated artificial intelligence-based framework for modeling and predicting quay crane productivity and operational delays in conventional container terminals, addressing key limitations in the existing port analytics litera...

(This article belongs to the Special Issue Artificial Intelligence Technology and Application in Marine Science and Engineering)
  • Article
  • Open Access
12 Citations
3,694 Views
26 Pages

A Quantitative Parametric Study on Output Time Delays for Autonomous Underwater Cleaning Operations

  • Fredrik Fogh Sørensen,
  • Malte von Benzon,
  • Jesper Liniger and
  • Simon Pedersen

Offshore pipelines and structures require regular marine growth removal and inspection to ensure structural integrity. These operations are typically carried out by Remotely Operated Vehicles (ROVs) and demand reliable and accurate feedback signals f...

(This article belongs to the Section Ocean Engineering)
  • Article
  • Open Access
28 Citations
8,555 Views
21 Pages

Mitigation of Tropospheric Delay in SAR and InSAR Using NWP Data: Its Validation and Application Examples

  • Xiaoying Cong,
  • Ulrich Balss,
  • Fernando Rodriguez Gonzalez and
  • Michael Eineder

21 September 2018

The neutral atmospheric delay has a great impact on synthetic aperture radar (SAR) absolute ranging and on differential interferometry. In this paper, we demonstrate its effective mitigation by means of the direction integration method using two prod...

(This article belongs to the Special Issue Ten Years of TerraSAR-X—Scientific Results)
  • Article
  • Open Access
4 Citations
6,267 Views
30 Pages

Optimizing Flight Delay Predictions with Scorecard Systems

  • Ilona Jacyna-Gołda,
  • Krzysztof Cur,
  • Justyna Tomaszewska,
  • Karol Przanowski and ,
  • Sarka Hoskova-Mayerova and
  • Szymon Świergolik
  • + 1 author+ 0 author

24 May 2025

Flight delays represent a significant challenge for airlines, airports, and passengers, impacting operational costs and customer satisfaction. Traditional prediction methods often rely on complex statistical analysis and mathematical models that may...

(This article belongs to the Special Issue Data Science and Machine Learning in Logistics and Transport, 2nd Edition)
  • Article
  • Open Access
1 Citations
2,581 Views
23 Pages

A Data-Driven Framework for Flight Delay Propagation Forecasting During Extreme Weather

  • Jiuxia Guo,
  • Jingyuan Li,
  • Jiang Yuan,
  • Yungui Yang and
  • Zihao Ren

5 November 2025

Flight delays during extreme weather events exhibit spatio-temporal propagation and cascading effects, posing serious challenges to the resilience of aviation systems. Existing prediction approaches often neglect dynamic dependencies across flight ch...

(This article belongs to the Special Issue Optimization and Machine Learning-Based Methods in Air Traffic Management and Aeronautical Domains)
  • Article
  • Open Access
5 Citations
3,324 Views
14 Pages

23 November 2022

This paper proposes an improved substrate integrated coaxial meander delay line to overcome the beam dispersion problem in a spaceborne synthetic aperture radar phased array antenna system with large bandwidth. The delay line operates in the range of...

(This article belongs to the Special Issue Advanced Design of RF/Microwave Circuit)
  • Article
  • Open Access
68 Citations
9,566 Views
19 Pages

Optimal PID Controller Design Based on PSO-RBFNN for Wind Turbine Systems

  • Jau-Woei Perng,
  • Guan-Yan Chen and
  • Shan-Chang Hsieh

7 January 2014

A strategy was proposed to determine the optimal operating point for the proportional-integral-derivative (PID) controller of a wind turbine, and identify the stability regions in the parameter space. The proposed approach combined particle swarm opt...

  • Article
  • Open Access
1 Citations
791 Views
29 Pages

To address the significant operational disruptions caused by inclement weather in maritime logistics, this study investigates the integrated rescheduling optimization of vessels and tugboats within one-way channel ports. The research aims to minimize...

(This article belongs to the Special Issue Maritime Logistics: Shipping and Port Management)
  • Article
  • Open Access
1,167 Views
28 Pages

Port congestion leads to frequent delays in multilevel handlings at automated terminals (ATMH). These delays propagate throughout the terminal, intensified by the interdependencies among equipment, which severely undermines the overall efficiency of...

(This article belongs to the Section Coastal Engineering)
  • Article
  • Open Access
7 Citations
3,537 Views
17 Pages

27 December 2022

The modification of a Smith predictor for the control of plants with response-delay asymmetry has been proposed. It was developed for application in frequency converters for the control of the speed of the AC induction motor drives of pumps used in w...

(This article belongs to the Special Issue Nonlinear Control with Applications to Energy Systems)
  • Communication
  • Open Access
4 Citations
2,780 Views
10 Pages

23 July 2021

In this paper, the delay-dependent stability of haptic systems is studied by developing a new stability criterion. Firstly, the haptic system inevitably introduces time delays by using communication networks to transmit information between the contro...

(This article belongs to the Special Issue Control Systems in the Presence of Time Delays)
  • Article
  • Open Access
1,848 Views
14 Pages

A Green Computing Business Aggregation Strategy for Low Earth Orbit Satellite Networks

  • Bo Wang,
  • Jiaqi Lv,
  • Dongyan Huang,
  • Zelin Lu and
  • Yuhang Fang

21 December 2024

This paper proposes a green computing strategy for low Earth orbit (LEO) satellite networks (LSNs), addressing energy efficiency and delay optimization in dynamic and energy-constrained environments. By integrating a Markov Decision Process (MDP) wit...

(This article belongs to the Section Communications)
  • Article
  • Open Access
1 Citations
1,023 Views
17 Pages

Resilient Frequency Control for Renewable-Energy Distributed Systems Considering Demand-Side Resources

  • Jijiang Gu,
  • Changzheng Shao,
  • Ling Li,
  • Hanxin Zhang and ,
  • Chengrong Lin and
  • Yangjun Zhou
  • + 1 author+ 0 author

13 October 2025

Extreme natural disasters can force microgrids into islanded operation, where low system inertia and asynchronous, time-varying communication delays present severe challenges to frequency stability. These challenges threaten not only short-term relia...

(This article belongs to the Special Issue Advances in Stability Control, Optimal Operation and Modeling Analysis of Power System with High-Level Renewable Energy)
  • Article
  • Open Access
31 Citations
7,214 Views
15 Pages

12 November 2016

Developing public transportation and giving priority to buses is a feasible solution for improving the level of public transportation service, which facilitates congestion alleviation and prevention, and contributes to urban development and city sust...

(This article belongs to the Section Sustainable Engineering and Science)
  • Article
  • Open Access
1,882 Views
22 Pages

Diverse Techniques in Estimating Integrated Water Vapor for Calibration and Validation of Satellite Altimetry

  • Stelios P. Mertikas,
  • Craig Donlon,
  • Achilles Tripolitsiotis,
  • Costas Kokolakis and ,
  • Antonio Martellucci,
  • Ermanno Fionda,
  • Maria Cadeddu,
  • Dimitrios Piretzidis,
  • Xenofon Frantzis and
  • Pierre Femenias
  • + 6 authors+ 1 author

11 August 2025

In satellite altimetry calibration, the atmosphere’s integrated water vapor content has been customarily derived through the Global Navigation Satellite Systems (GNSS), principally over land where the satellite radiometer is not operational. Pr...

(This article belongs to the Special Issue Applications of Satellite Geodesy for Sea-Level Change Observation)
  • Article
  • Open Access
7 Citations
5,250 Views
33 Pages

4 November 2025

The aviation industry operates as a complex, dynamic system generating vast volumes of data from aircraft sensors, flight schedules, and external sources. Managing this data is critical for mitigating disruptive and costly events such as mechanical f...

  • Article
  • Open Access
62 Citations
16,756 Views
20 Pages

The problem of flight delay prediction is approached most often by predicting a delay class or value. However, the aviation industry can benefit greatly from probabilistic delay predictions on an individual flight basis, as these give insight into th...

(This article belongs to the Special Issue Application of Data Science to Aviation)
  • Article
  • Open Access
619 Views
36 Pages

Analyzing Train Delay Impacts on Subway Stations via a Three-Stage Approach: An Empirical Study on Shanghai and Shenzhen Metro Systems

  • Jingjing Chen,
  • Xu Cheng,
  • Yuxin He,
  • Qi Zhang and ,
  • Xiaoling Liu,
  • Qin Luo and
  • Kwok-Leung Tsui
  • + 2 authors+ 0 author

Transit delays can adversely affect passengers, operational efficiency, and daily lives. It is important to develop effective methods to identify and analyze train stations vulnerable to delays. This paper proposes a three-stage analytical framework...

(This article belongs to the Special Issue Artificial Intelligence and Data Science for Smart Cities, 2nd Edition)
  • Feature Paper
  • Article
  • Open Access
14 Citations
2,878 Views
14 Pages

23 November 2019

We consider the periodic boundary value problem (PBVP) for a semilinear fractional-order delayed functional differential inclusion in a Banach space. We introduce and study a multivalued integral operator whose fixed points coincide with mild solutio...

(This article belongs to the Special Issue Fixed Point, Optimization, and Applications)
  • Article
  • Open Access
416 Views
29 Pages

7 September 2026

To address the disruption caused by vessel delays to the port’s initial operation plan, this study investigates the integrated rescheduling optimization of vessel sequencing and berth allocation under vessel delay impacts. Focusing on a port wi...

(This article belongs to the Special Issue Recent Advances in Planning and Scheduling for Supply Chain Optimization)
  • Article
  • Open Access
6 Citations
3,473 Views
21 Pages

Maritime transport is crucial for global trade, as over 80% of goods are transported by sea. Recent conflicts have exposed the vulnerability of shipping routes to disruptions. Therefore, devising an optimal plan for naval escort operations is critica...

(This article belongs to the Special Issue Smart Seaport and Maritime Transport Management)
  • Article
  • Open Access
2 Citations
7,529 Views
24 Pages

24 May 2023

Some delay patterns are correlated to historical performance and can reflect the trend of delays in future flights. A typical example is the delay from an earlier inbound flight causing delayed departure of a connecting and downstream outbound flight...

(This article belongs to the Section E5: Financial Mathematics)
  • Article
  • Open Access
3 Citations
3,223 Views
18 Pages

5 August 2021

This paper has dealt with a tracking control problem for a class of unstable reaction–diffusion system with time delay. Iterative learning algorithms are introduced to make the infinite-dimensional repetitive motion system track the desired trajector...

(This article belongs to the Special Issue Control Systems in the Presence of Time Delays)
  • Article
  • Open Access
3 Citations
2,503 Views
24 Pages

1 October 2025

Background: In the dynamic world of commercial aviation, the efficient management of ground handling (GH) operations in aircraft turnarounds is an increasingly complex challenge, often perceived as operational chaos. Methods: This paper introduces th...

  • Article
  • Open Access
5 Citations
2,241 Views
24 Pages

6 September 2023

In an electricity and heat integrated energy system, the transmission of thermal energy encounters significant delays, and the delays are often not integer multiples of the dispatch interval. This mismatch poses challenges for achieving coordinated d...

(This article belongs to the Section A1: Smart Grids and Microgrids)
  • Article
  • Open Access
563 Views
25 Pages

Urban mobility systems generate large volumes of heterogeneous geospatial data that differ in temporal resolution, spatial coverage, update frequency, and semantic structure, making integrated near-real-time analysis difficult. This paper presents a...

(This article belongs to the Special Issue Innovative Mobility Services for Smart Cities)
  • Article
  • Open Access
418 Views
27 Pages

To address the robustness degradation of intelligent vehicle fleet longitudinal control systems caused by the coexistence of disturbances and time-delay, a longitudinal finite-time control strategy based on a predictive finite-time extended state obs...

(This article belongs to the Special Issue New Journeys in Vehicle System Dynamics and Control)
  • Article
  • Open Access
23 Citations
11,116 Views
21 Pages

1 February 2018

Teleoperated mobile robots, equipped with object manipulation capabilities, provide safe means for executing dangerous tasks in hazardous environments without putting humans at risk. However, mainly due to a communication delay, complex operator inte...

  • Article
  • Open Access
7 Citations
8,024 Views
23 Pages

6 December 2021

Digital processing poses a considerable time delay on controllers of induction motor (IM) driving system, which degrades the effects of torque/flux decoupling, slows the motor torque response down, or even makes the entire system unstable, especially...

(This article belongs to the Special Issue Advancements in Electric Motors, Drives, Power Converters and Related Systems)
  • Article
  • Open Access
3 Citations
2,199 Views
21 Pages

Predictability of Flight Arrival Times Using Bidirectional Long Short-Term Memory Recurrent Neural Network

  • Vladimir Socha,
  • Miroslav Spak,
  • Michal Matowicki,
  • Lenka Hanakova and ,
  • Lubos Socha and
  • Umer Asgher
  • + 1 author+ 0 author

30 November 2024

The rapid growth in air traffic has led to increasing congestion at airports, creating bottlenecks that disrupt ground operations and compromise the efficiency of air traffic management (ATM). Ensuring the predictability of ground operations is vital...

(This article belongs to the Section Air Traffic and Transportation)
  • Article
  • Open Access
5 Citations
3,188 Views
18 Pages

16 December 2022

The unbalanced nature of passenger demand and the uncertainty of delay at intersections are considered critical factors in the efficiency of public transportation operations. Considering the controllable characteristics of the bus rapid transit syste...

(This article belongs to the Section Sustainable Transportation)
  • Feature Paper
  • Article
  • Open Access
15 Citations
5,797 Views
13 Pages

20 March 2019

Drones are expected to operate autonomously, yet they will also interact with humans to solve tasks together. To support civilian human-drone teams, we propose a distributed architecture where sophisticated operations such as image recognition, coord...

(This article belongs to the Special Issue Unmanned Aerial Vehicle Networks, Systems and Applications)
  • Article
  • Open Access
652 Views
11 Pages

26 November 2025

This study utilizes approximation techniques to address a boundary value problem involving a differential equation with a delayed argument. The problem is approached through analytical techniques by transforming it firstly into an equivalent integral...

(This article belongs to the Special Issue Fractional Differentiation and Applied Mathematics: Recent Advances and Applications)
  • Article
  • Open Access
3 Citations
5,057 Views
33 Pages

Every year, airlines invest considerable resources in recovering from irregular operations caused by delays and disruptions to aircraft and crew. Consequently, the need to reschedule aircraft and crew to better address these problems has become press...

(This article belongs to the Section Air Traffic and Transportation)
  • Article
  • Open Access
13 Citations
4,775 Views
25 Pages

Development of Power-Delay Product Optimized ASIC-Based Computational Unit for Medical Image Compression

  • Tanya Mendez,
  • Tejasvi Parupudi,
  • Vishnumurthy Kedlaya K and
  • Subramanya G. Nayak

The proliferation of battery-operated end-user electronic devices due to technological advancements, especially in medical image processing applications, demands low power consumption, high-speed operation, and efficient coding. The design of these d...

(This article belongs to the Topic Advances in Microelectronics and Semiconductor Engineering)
  • Article
  • Open Access
9 Citations
3,872 Views
22 Pages

24 October 2018

With the rapid development of smart grid technologies, communication systems are further integrated in the existing power grids. The real-time capability and reliability of the power applications are receiving increasing concerns. Thus, it is importa...

(This article belongs to the Special Issue Smart Grid Networks and Energy Cyber Physical Systems)
  • Article
  • Open Access
1 Citations
434 Views
29 Pages

Deterministic Chaos Maps in External-Cavity Semiconductor Lasers with Short-Delay Optical Feedback

  • Gerardo Antonio Castañón Ávila,
  • Ana Maria Sarmiento-Moncada,
  • Alejandro Aragón-Zavala and
  • Ivan Aldaya Garde

26 June 2026

In this work, we investigate deterministic chaos in external-cavity semiconductor lasers with delayed optical self-feedback. A noise-free quadrature-based delay differential model is used to isolate the intrinsic nonlinear dynamics produced by phase-...

(This article belongs to the Section Optics and Lasers)
  • Article
  • Open Access
4 Citations
2,084 Views
23 Pages

8 December 2022

With the development of energy integration technology, demand response (DR) has gradually evolved into integrated demand response (IDR). In this study, for the integrated energy system (IES) on the distribution grid side with electricity, heat, natur...

of 27