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221 Results Found

  • Article
  • Open Access
6 Citations
2,691 Views
19 Pages

Fixed-Time Synchronization Control of Delayed Dynamical Complex Networks

  • Mei Liu,
  • Binglong Lu,
  • Zhanfeng Li,
  • Haijun Jiang and
  • Cheng Hu

30 November 2021

Fixed-time synchronization problem for delayed dynamical complex networks is explored in this paper. Compared with some correspondingly existed results, a few new results are obtained to guarantee fixed-time synchronization of delayed dynamical netwo...

  • Article
  • Open Access
9 Citations
2,420 Views
16 Pages

This paper mainly deals with the issue of fixed-time synchronization of fuzzy-based impulsive complex networks. By developing fixed-time stability of impulsive systems and proposing a T-S fuzzy control strategy with pure power-law form, some simple c...

  • Communication
  • Open Access
5 Citations
1,974 Views
12 Pages

3 December 2022

This paper investigates the fixed-time synchronization problem of a Kuramoto–oscillator network in the presence of a pacemaker. Based on the framework of the cyber-physical system (CPS), fixed-time synchronization criteria of such network are p...

  • Article
  • Open Access
1 Citations
1,818 Views
13 Pages

7 May 2022

The synchronous genetic regulatory networks model includes the drive system and response system, and the drive-response system is symmetric. From a biological point of view, this model illustrates the dynamic behaviors in gene-to-protein processes, i...

  • Article
  • Open Access
5 Citations
1,671 Views
22 Pages

7 April 2024

Asymptotic synchronization requires continuous external control of the system, which is unrealistic considering the cost of control. Adaptive control methods have strong robustness to uncertainties such as disturbances and unknowns. On the other hand...

  • Article
  • Open Access
7 Citations
3,940 Views
15 Pages

18 March 2023

In this paper, we investigated the fixed-time synchronization problem of a type of reaction-diffusion fuzzy neural networks with stochastic perturbations by developing simple control schemes. First, some generalized fixed-time stability results are i...

  • Article
  • Open Access
23 Citations
3,262 Views
21 Pages

This study is concerned with the dynamic investigation and fixed-time synchronization of a fractional-order financial system with the Caputo derivative. The rich dynamic behaviors of the fractional-order financial system with variations of fractional...

  • Article
  • Open Access
340 Views
19 Pages

Fast Fixed-Time Control for Intra- and Inter-Layer Synchronization of Multi-Layer Networks

  • Shiju Yang,
  • Hongsen He,
  • Man-Fai Leung,
  • Yiting Tang and
  • Li Yan

28 October 2025

This study addresses the problem of fast fixed-time synchronization (FDTS) in multi-layer networks (MLNs), focusing on both intra-layer and inter-layer dynamic synchronization. First, we propose a more representative MLN framework in which each layer...

  • Article
  • Open Access
3 Citations
1,770 Views
18 Pages

26 February 2024

This paper concerns a class of coupled competitive neural networks, subject to disturbance and discontinuous activation functions. To realize the fixed-time quasi-bipartite synchronization, an aperiodic intermittent controller is initially designed....

  • Article
  • Open Access
8 Citations
2,354 Views
14 Pages

30 November 2021

This paper considers the fixed-time synchronization (FIXTS) of neural networks (NNs) by using quantized intermittent control (QIC). Based on QIC, a fixed-time controller is designed to ensure that the NNs achieve synchronization in finite time. With...

  • Article
  • Open Access
1 Citations
935 Views
14 Pages

14 February 2025

This article focuses on the problem of finite-time and fixed-time synchronization for Cohen–Grossberg neural networks (CGNNs) with time-varying delays and memristor connection weights. First, through a nonlinear transformation, an alternative s...

  • Article
  • Open Access
347 Views
21 Pages

9 November 2025

This paper investigates the fixed-time stabilization and synchronization of a class of memristor inertial BAM neural networks with mixed delays using a non-order reduction method. By constructing a Lyapunov function and leveraging novel fixed-time st...

  • Article
  • Open Access
3 Citations
1,425 Views
18 Pages

7 September 2023

This paper considers the fixed-time synchronization of complex-valued coupled networks (CVCNs) with hybrid perturbations (nonlinear bounded external perturbations and stochastic perturbations). To accomplish the target of fixed-time synchronization,...

  • Article
  • Open Access
19 Citations
2,092 Views
14 Pages

Fixed-Time Output-Constrained Synchronization of Unknown Chaotic Financial Systems Using Neural Learning

  • Qijia Yao,
  • Hadi Jahanshahi,
  • Larissa M. Batrancea,
  • Naif D. Alotaibi and
  • Mircea-Iosif Rus

8 October 2022

This article addresses the challenging problem of fixed-time output-constrained synchronization for master–slave chaotic financial systems with unknown parameters and perturbations. A fixed-time neural adaptive control approach is originally pr...

  • Article
  • Open Access
1 Citations
614 Views
18 Pages

29 April 2025

Introducing a memristor into chaotic systems facilitates the construction of high-dimensional hyperchaotic systems. The hyperchaotic signals generated by these systems have important applications in the field of information security. A five-dimension...

  • Article
  • Open Access
2 Citations
4,405 Views
19 Pages

25 September 2024

Due to climate change, the frequency and intensity of torrential rainfall in urban areas are increasing, leading to more frequent flood damage. Consequently, there is a need for a rapid and accurate analysis of urban flood response capabilities. The...

  • Article
  • Open Access
3 Citations
1,346 Views
29 Pages

In this paper, an incommensurate fractional-order chaotic system is established based on Chua’s system. Combining fractional-order calculus theory and the Adomian algorithm, the dynamic phenomena of the incommensurate system caused by different...

  • Article
  • Open Access
2 Citations
1,502 Views
20 Pages

29 November 2023

This article is concerned with fixed-time synchronization and preassigned-time synchronization of Cohen–Grossberg quaternion-valued neural networks with discontinuous activation functions and generalized time-varying delays. Firstly, a dynamic...

  • Article
  • Open Access
2 Citations
850 Views
17 Pages

Finite-time synchronization depends on the initial conditions of the system in question. However, the initial conditions of an actual system are often difficult to estimate or even unknown. Therefore, a more valuable and pressing problem is fixed-tim...

  • Article
  • Open Access
9 Citations
2,095 Views
20 Pages

21 November 2022

This article is mainly concerned with the fixed-time and predefined-time synchronization problem for a type of complex-valued BAM neural networks with stochastic perturbations and impulse effect. First, some previous fixed-time stability results on n...

  • Article
  • Open Access
17 Citations
786 Views
19 Pages

6 August 2025

This paper presents a novel four-dimensional (4D) chaotic system exhibiting parametric symmetry breaking and multistability. Through equilibrium stability analysis, attractor reconstruction, Lyapunov Exponent spectra (LEs), and bifurcation diagrams,...

  • Article
  • Open Access
1,388 Views
19 Pages

17 April 2024

This paper discusses the synchronization problem of impulsive stochastic bidirectional associative memory neural networks with a diffusion term, specifically focusing on the fixed-time (FXT) and predefined-time (PDT) synchronization. First, a number...

  • Article
  • Open Access
2 Citations
1,409 Views
31 Pages

23 April 2024

In this paper, the fixed-time and preassigned-time synchronization issues of fully quaternion-valued fuzzy memristive neural networks are studied based on the dynamic event-triggered control mechanism. Initially, the fuzzy rules are defined within th...

  • Article
  • Open Access
384 Views
30 Pages

This paper develops a unified synchronization framework for octonion-valued fractional-order neural networks (FOOVNNs) subject to mixed delays, Lévy disturbances, and topology switching. A fractional sliding surface is constructed by combining...

  • Article
  • Open Access
10 Citations
2,206 Views
38 Pages

15 February 2023

Chaotic nonlinear dynamical systems, in which the generated time series exhibit high entropy values, have been extensively used and play essential roles in tracking accurately the complex fluctuations of the real-world financial markets. We are conce...

  • Article
  • Open Access
10 Citations
2,125 Views
17 Pages

In this paper, the fixed-time multi-switch combination–combination synchronization (FTMSCCS) of fractional-order chaotic systems with uncertainties and external disturbances is studied. The appropriate sliding mode surface and controller are pr...

  • Article
  • Open Access
5 Citations
1,282 Views
14 Pages

Fixed-Time Adaptive Chaotic Control for Permanent Magnet Synchronous Motor Subject to Unknown Parameters and Perturbations

  • Qijia Yao,
  • Hadi Jahanshahi,
  • Stelios Bekiros,
  • Jinping Liu and
  • Abdullah A. Al-Barakati

20 July 2023

It is well known that the permanent magnet synchronous motor (PMSM) exhibits chaotic characteristics when its parameters fall within a certain range, which can lead to system instability. This article proposes an adaptive control strategy for achievi...

  • Article
  • Open Access
11 Citations
2,178 Views
19 Pages

6 November 2023

This paper presents the Robust Constant Exponent Coefficient Fixed-Time Control (CECFSMC), an innovative control technique for precisely regulating the speed of a permanent magnet synchronous motor (PMSM) by utilizing fixed-time stability with consta...

  • Article
  • Open Access
1,499 Views
15 Pages

25 October 2023

This paper addresses the synchronization problem of delayed stochastic neural networks with discontinuous activation functions (DSNNsDF), specifically focusing on fixed/preassigned-time synchronization. The objective is to develop a class of simplifi...

  • Article
  • Open Access
4 Citations
1,153 Views
19 Pages

This study delves into the synchronization issues of the impulsive fractional-order, mainly the Caputo derivative of the order between 0 and 1, bidirectional associative memory (BAM) neural networks incorporating the diffusion term at a fixed time (F...

  • Article
  • Open Access
3 Citations
2,026 Views
16 Pages

11 November 2024

To improve the tracking performance and robustness of traditional multi-motor speed cooperative control, this paper proposes a speed cooperative control method for multiple permanent magnet synchronous motors (multi-PMSMs) based on the fixed-time con...

  • Article
  • Open Access
4 Citations
1,555 Views
18 Pages

2 September 2023

Instead of the separation approach, this paper mainly centers on studying the fixed/preassigned-time (FXT/PAT) synchronization of a type of complex-valued stochastic fuzzy cellular neural networks (CVSFCNNs) with time delay based on the direct method...

  • Article
  • Open Access
2 Citations
1,174 Views
22 Pages

11 June 2024

In this paper, the stochastic Takagi–Sugeno fuzzy recurrent neural networks (STSFRNNS) with distributed delay is established based on the Takagi–Sugeno (TS) model and the fixed time synchronization problem is investigated. In order to syn...

  • Article
  • Open Access
216 Views
27 Pages

In this study, a comprehensive analysis of the fixed/preassigned-time synchronization of a class of quaternion-valued BAM (QBAM) neural networks with stochastic and impulsive effects is conducted. Unlike previous analysis methods, our method features...

  • Article
  • Open Access
424 Views
19 Pages

This paper investigates the fixed-time synchronization of fractional-order proportional delay Hopfield neural networks (PDHNNs) with bounded parameter uncertainties. Unlike constant delay and bounded variable delay, proportional delay has time-varyin...

  • Article
  • Open Access
4 Citations
1,812 Views
12 Pages

Fixed-Time Sliding Mode Control for Linear Motor Traction Systems with Prescribed Performance

  • Chunguang Yang,
  • Guanyang Hu,
  • Qichao Song,
  • Yachao Wang and
  • Weilin Yang

18 February 2024

In this research, we propose a fixed-time sliding mode controller using a prescribed performance control approach to address the speed tracking problem in linear motor traction systems, which are powered by high-power permanent magnet linear synchron...

  • Article
  • Open Access
11 Citations
2,448 Views
19 Pages

Due to the widespread application of neural networks (NNs), and considering the respective advantages of fractional calculus (FC), inertial neural networks (INNs), cellular neural networks (CNNs), and fuzzy neural networks (FNNs), this paper investig...

  • Article
  • Open Access
17 Citations
3,073 Views
18 Pages

28 February 2024

This paper focuses on the speed control of a permanent magnet synchronous motor (PMSM) for electric drives with model uncertainties and external disturbances. Conventional sliding mode control (CSMC) can only converge asymptotically in the infinite d...

  • Article
  • Open Access
1 Citations
956 Views
23 Pages

29 May 2025

This work focuses on fixed-time synchronized trajectory tracking control for unmanned airships subject to time-varying error constraints and unknown disturbances. First, to guarantee strict adherence to prescribed performance bounds, an error transfo...

  • Article
  • Open Access
7 Citations
1,895 Views
16 Pages

In this study, we proposed a sliding mode control method based on fixed-time sliding mode surface for the synchronization of uncertain fractional-order hyperchaotic systems. In addition, we proposed a novel self-evolving non-singleton-interval type-2...

  • Article
  • Open Access
8 Citations
4,184 Views
7 Pages

Comparison of Single, Fixed-Time Artificial Insemination in Gilts Using Two Different Protocols to Synchronize Ovulation

  • Lima Rodrigues,
  • Rocio Amezcua,
  • Glen Cassar,
  • Terri L O’Sullivan and
  • Robert Friendship

14 February 2020

In order to efficiently have a consistent supply of service-ready gilts available to incorporate into each batch of breeding sows, it is necessary to manipulate the timing of estrus and possibly the timing of ovulation of gilts. Estrus can be synchro...

  • Article
  • Open Access
206 Views
25 Pages

Online Synchronous Coordinated Assignment and Planning for Heterogeneous Fixed-Wing UAVs

  • Xindi Wang,
  • Jiansong Zhang,
  • Zhenyu Ma,
  • Chuanshuo Cao and
  • Hao Liu

This paper addresses the Multi-Target Reconnaissance (MTR) problem for heterogeneous Fixed-Wing Unmanned Aerial Vehicles (FW-UAVs), focusing on synchronized and time-optimal mission execution under stringent constraints. A two-stage coordinated assig...

  • Article
  • Open Access
3 Citations
934 Views
16 Pages

Time-Synchronized Fault-Tolerant Control for Robotic Manipulators

  • Duansong Wang,
  • Gang Zhang,
  • Rui Chen,
  • Jinzhong Zhang and
  • Tan Zhang

3 February 2025

This article proposes a time-synchronized fault-tolerant convergence control method for n-degree-of-freedom robotic manipulators. The main challenge lies in driving the tracking errors of all joints to converge simultaneously, especially in the prese...

  • Technical Note
  • Open Access
1 Citations
1,903 Views
18 Pages

24 August 2022

This paper mainly studies the distributed fixed-time coordinated attitude tracking control problem of spacecraft formation with a dynamic leader spacecraft under directed communication topology. Follower spacecraft cannot communicate directly with th...

  • Article
  • Open Access
396 Views
17 Pages

16 December 2025

This study evaluated the applicability of the dual drainage model, Hyper Connected–Solution for Urban Flood (HC-SURF), for real-time urban flood forecasting. The model was applied to the extreme rainfall event of August 2022 in the Sillim and D...

  • Article
  • Open Access
218 Views
18 Pages

This paper investigates the problem of fixed-time event-triggered consensus control for distributed unmanned underwater vehicle systems subject to communication and energy constraints. The systematic integration control framework is developed, where...

  • Article
  • Open Access
13 Citations
2,273 Views
17 Pages

11 August 2022

This paper mainly proposes a new disturbance observer (DO) for a secure communication system (SCS) of the chaos-based system (CBS). First, the fractional-order (FO) Chen chaotic system is remodeled by a Takagi–Sugeno (T–S) fuzzy system wi...

  • Proceeding Paper
  • Open Access
990 Views
7 Pages

Galileo Receiver Performance Analysis with New I/NAV Improvements Live Data

  • Rui D. Nunes,
  • Mahamoudou Ouedraogo,
  • Susanne Schlötzer,
  • Nityaporn Sirikan and
  • Stefan Wallner

29 October 2023

This work presents the results showing the improvement of the performance of a Galileo receiver processing the new I/NAV words 16–20 and SSP in comparison to the performance using the previous legacy I/NAV configuration. The results were obtain...

  • Feature Paper
  • Article
  • Open Access
1 Citations
2,315 Views
15 Pages

13 September 2024

Fixed-time artificial insemination is an important technique in swine production that can improve reproductive efficiency and meat production quality through making better use of the genetic potential of breeding males and reducing the costs associat...

  • Article
  • Open Access
853 Views
22 Pages

Grid-forming (GFM) converters play a vital role in future power systems due to their ability to independently establish voltage and frequency. However, their interaction with AC circuits may give rise to synchronous oscillations, which pose a threat...

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