Article
Mathematics, Interdisciplinary Applications
Weiqiu Pan, Tianzeng Li, Yu Wang
Summary: This paper deals with the issue of the multi-switching sliding mode combination synchronization of fractional order chaotic systems with different structures and unknown parameters under double stochastic disturbances. The proposed method ensures the synchronization of state variables between the drive and response systems, while also assessing the unknown parameters and examining the upper bound values of stochastic disturbances.
FRACTAL AND FRACTIONAL
(2022)
Article
Mathematics, Applied
Honglei Yin, Bo Meng, Zhen Wang
Summary: This article addresses the synchronization control problem of a class of chaotic systems with unknown uncertainties and outside perturbation by using an innovative adaptive sliding mode controller constructed using a disturbance observer. The disturbance observer can approximate the unknown external disturbances well by choosing the appropriate gain matrix. Then, a continuous adaptive sliding mode controller based on the disturbance observer's output is designed using adaptive techniques and the system dimensional expansion method. The efficiency of the suggested strategy is finally tested numerically using the Duffing-Holmes chaotic system.
Article
Acoustics
Samaneh Payandeh Najafabadi, Mahnaz Hashemi
Summary: This article investigates the problem of adaptive sliding synchronization for Duffing-Holmes fractional-order chaotic systems in the presence of dead-zone, disturbance, and uncertainty. The proposed adaptive sliding mode controller guarantees the asymptotic stability of the system despite the presence of the dead-zone and uncertainty. Simulation results show the validity and effectiveness of the proposed controller for synchronization of Duffing-Holmes fractional-order chaotic systems perturbed by the dead-zone, disturbance, and uncertainty.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Mathematics, Applied
Hanlin Dong, Jinde Cao, Heng Liu
Summary: In this paper, an observer-based event-triggered adaptive fuzzy backstepping synchronization control method is proposed for a class of uncertain fractional order chaotic systems. Fuzzy logic systems are used to estimate unknown functions and a fractional order command filter is designed to avoid complexity problems. An effective error compensation mechanism is devised to reduce filter error and improve synchronization accuracy. The designed controller ensures convergence of the synchronization error and avoids Zeno behavior, as demonstrated through numerical simulations.
Article
Mathematics, Applied
Hui Fu, Yonggui Kao
Summary: This paper proposes two adaptive sliding mode control (ASMC) strategies for achieving finite-time synchronization of uncertain general fractional unified chaotic systems (UGFUCSs) in the presence of uncertainty and external disturbance. The general fractional unified chaotic system (GFUCS) is first developed, which can be transitioned from the general Lorenz system to the general Chen system using a general kernel function. Two ASMC methods are then employed to achieve finite-time synchronization of UGFUCSs, where the system states reach the sliding surfaces within a finite time. The first ASMC approach uses three sliding mode controllers for synchronization between chaotic systems, while the second ASMC method only requires one sliding mode controller. The effectiveness of the proposed ASMC approaches is verified through numerical simulations.
Article
Multidisciplinary Sciences
Jianxiang Yang, Jianbin Xiong, Jian Cen, Wei He
Summary: This paper focuses on the finite-time generalized synchronization problem of non-identical fractional order chaotic (or hyper-chaotic) systems by designing an adaptive sliding mode controller. The effects of disturbances and model uncertainties are taken into account. The proposed approach is validated through numerical simulations, and a novel speech cryptosystem is proposed based on the generalized finite-time synchronization criterion.
Article
Mathematics, Interdisciplinary Applications
Ehsan Aslmostafa, Mohammad Javad Mirzaei, Mostafa Asadollahi, Mohammad Ali Badamchizadeh
Summary: This paper investigates the synchronization problem of two nonlinear MIMO systems in finite-time period, proposing the use of FTDO and TSMC to achieve synchronization. The effectiveness and accuracy of the proposed method are demonstrated through simulation on a Chameleon master-slave chaotic flow.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Mathematics, Interdisciplinary Applications
Tianyuan Jia, Xiangyong Chen, Liping He, Feng Zhao, Jianlong Qiu
Summary: This paper investigates the finite-time synchronization of uncertain fractional-order memristive neural networks (FMNNs) with leakage and discrete delays, considering the impacts of uncertain parameters and external disturbances. A fractional-order adaptive terminal sliding mode control scheme (FATSMC) is designed to estimate the upper bounds of unknown external disturbances effectively. The finite-time synchronization of the master-slave FMNNs has been achieved and the corresponding synchronization criteria and explicit expression of settling time (ST) are obtained. A numerical example and a secure communication application are provided to demonstrate the validity of the results.
FRACTAL AND FRACTIONAL
(2022)
Article
Mathematics, Applied
Mohammadreza Askari Sepestanaki, Mohammad Soofi, Mojtaba Hadi Barhaghtalab, Hamidreza Bahmani, Saleh Mobayen, Abolfazl Jalilvand
Summary: This study proposes an adaptive continuous barrier function as a fractional-order control system to stabilize chaotic systems with unknown uncertainties using the terminal sliding mode control technique with chattering-free property. The greater flexibility of the fractional-order controller compared to the integer-order controller is the main reason for its usage. Applying an adaptive approach and Lyapunov's stability theory, the study presents an adaptive continuous barrier fractional-order chattering-free finite-time controller for chaotic systems with unknown uncertainties and external disturbances. The suggested controller can effectively stabilize the chaotic system with a continuous and smooth control law, even without knowledge of the system boundaries, and in the presence of unknown disturbances caused by model uncertainties. MATLAB simulation results confirm the high efficiency of the proposed control technique in controlling chaotic systems with unknown perturbations.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Xin Meng, Zhengtian Wu, Cunchen Gao, Baoping Jiang, Hamid Reza Karimi
Summary: This brief introduces a method for addressing the problem of finite-time projective synchronization of variable-order fractional chaotic systems using sliding mode control. The method involves designing novel sliding surfaces and control strategies to ensure system stability and obtaining a criterion for finite-time stability.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Mathematics
Chih-Hsueh Lin, Guo-Hsin Hu, Jun-Juh Yan
Summary: This study introduces a robust sliding mode control method to achieve chaos synchronization even under the influence of matched/mismatched disturbances and input uncertainty. By using a proportional-integral switching surface, the controlled error dynamics in the sliding manifold become easier to analyze.
Article
Automation & Control Systems
Shixi Hou, Cheng Wang, Yundi Chu, Juntao Fei
Summary: This paper proposes an adaptive fractional-order terminal sliding mode control scheme combined with a recurrent meta-cognitive fuzzy neural network for robust current control of active power filter, which achieves precise tracking performance and superior control performance.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2022)
Article
Computer Science, Artificial Intelligence
Zahra Rasooli Berardehi, Chongqi Zhang, Mostafa Taheri, Majid Roohi, Mohammad Hassan Khooban
Summary: This paper introduces a dynamic-free T-S fuzzy sliding mode control method for synchronizing different chaotic fractional-order systems in the presence of input saturation. Using a new definition of fractional calculus and the fractional version of the Lyapunov stability theorem and linear matrix inequality concept, the proposed controller is able to suppress and synchronize the undesired behavior of the fractional-order chaotic systems without any chattering phenomenon. An example of synchronization of complex power grid systems is provided to illustrate the theoretical result of the paper in real-world applications.
INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS
(2023)
Article
Mathematics
Rongwei Guo, Yaru Zhang, Cuimei Jiang
Summary: This paper addresses the complete synchronization of fractional-order chaotic systems with model uncertainty and external disturbance. It proposes two dynamic feedback control methods and demonstrates the feasibility of the results using the fractional-order Lorenz system.
Article
Mathematics
Dehui Liu, Tianzeng Li, Yu Wang
Summary: This paper investigates the dual synchronization problem of two different fractional-order chaotic systems with uncertain parameters. It introduces a synchronization method based on Lyapunov stability theory and designs adaptive controllers and adaptive laws to achieve dual synchronization of the fractional-order chaotic systems.
Article
Engineering, Multidisciplinary
Muhammad Sajid, Ghulam Bary, Muhammad Asim, Riaz Ahmad, Muhammad Irfan Ahamad, Hammad Alotaibi, Adnanul Rehman, Ilyas Khan, Yin Guoliang
Summary: Phosphorite mineral is a crucial source of phosphorus with applications in agriculture, pottery, and animal feed. The quality of phosphorite is influenced by various factors, and beneficiation is key to exploring medium to low grade reserves. Different techniques like flotation, direct carbonation, and bioleaching have been explored for improving phosphorite quality.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Mathematics, Interdisciplinary Applications
Ghulam Bary, Waqar Ahmed, Muhammad Sajid, Riaz Ahmad, Nawa Alshammari, Ilyas Khan
Summary: This research measures multi-particle quantum statistical correlations in the collisions of heavy nuclei at unrivaled energies. The study reveals remarkable consequences that may arise due to non-chaotic and granular nature particle sources. By analyzing the ejection of particles from disseminated agglomerations of tiny droplets, researchers gain insights into the congenital properties of chaos-coherence matter produced during collisions.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Ecology
Yin Guoliang, Deng Fang, Apu Chowdhury, Zhang Aixin, Muhammad Sajid
Summary: This manuscript compiles data on persistent organic pollutants (POPs) in Chinese freshwater channels, lakes, and corresponding coastal areas over the past twelve years. The results show that while most water channels meet the emission limits for POPs, some exceed the safe limits and pose acute damage potential, emphasizing the need for careful treatment.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Muhammad Sajid, Sineen Bari, Muhammad Saif Ur Rehman, Muhammad Ashfaq, Yin Guoliang, Ghulam Mustafa
Summary: This study successfully removed paracetamol from water using activated carbon derived from Cannabis Sativum Hemp. The results showed that the Cannabis Sativum Hemp is an efficient, cheap, and sustainable feedstock for the manufacturing of activated carbon for the efficient removal of paracetamol from an aqueous system.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Muhammad Asim, Bushra Maryam, Shuguang Zhang, Muhammad Sajid, Alibek Kurbanov, Lun Pan, Ji-Jun Zou
Summary: In this study, Au/Ni2P and Au/CoP catalysts were synthesized for ammonia borane hydrolysis, showing increased activity compared to Ni2P and CoP, respectively, due to the synergistic effect of Au nanoparticles and metal phosphides. XPS analysis revealed that the synergistic effect of Au5+ and (Ni2P)5- was stronger than that of Au5+ and (CoP)5-. Kinetic studies showed higher activation energy and lower TOF for Au/Ni2P compared to Au/CoP, providing an effective approach for enhancing the H2 evolution rate in ammonia borane hydrolysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Marine
Naeem Ullah, Menglan Duan, Miaozi Zheng, Mac Darlington Uche Onuoha, Muhammad Sajid
Summary: In this paper, a floating multibody system's planar dynamics are studied using two tugboats and a payload. The coupled equations of motion are established using the Velocity Transformation Technique, and the numerical solution is obtained using the Runge Kutta Method of Fourth-Order. The Finite Element Modeling approach is used to discuss the installation operation. The results are validated and found to be in agreement with a numerical simulation from OrcaFlex.
Article
Engineering, Marine
Naeem Ullah, Menglan Duan, Mac Darlington Uche Onuoha, Asad Syed, Muhammad Sajid, Guomin Sun, Wenda Li
Summary: The installation of subsea equipment in deep water requires a precise and safe strategy to minimize mishaps. This study presents a theoretical model for the constrained dynamics of a multibody system in an offshore installation scenario. The model demonstrates more accuracy and stability compared to the OrcaFlex numerical simulation. The findings will enhance the safety and stability of multibody structure installation in deep water.
Article
Engineering, Marine
Naeem Ullah, Mac Darlington Uche Onuoha, Menglan Duan, Muhammad Sajid
Summary: This study models a floating barge with suspended payload and 3-DOF to investigate the dynamic response of the floating installation system. The coupled equations of motion system for a 6-DOF multibody dynamic model are established and numerically solved. The proposed model performs better than existing models and will improve operational design for safe ocean engineering and deepwater equipment installations.
SHIPS AND OFFSHORE STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Muhammad Farooq Saleem Khan, Lutafullah Tahir, Xu Zhou, Ghulam Bary, Muhammad Sajid, Ahmad Khawar Shahzad, Ilyas Khan, Abdullah Mohamed, Riaz Ahmad
Summary: This study developed a new reverse-phase liquid chromatography method to simultaneously analyze the content of Amlodipine Besylate and Perindopril Tertbutylamine in mixed tablets. The results showed that this method is accurate and reliable. This is the first time that high-performance liquid chromatography has been used in a time-efficient and cost-effective way to simultaneously identify and quantify Amlodipine Besylate and Perindopril Tertbutylamine.
Review
Chemistry, Multidisciplinary
Obaid Ali Qamar, Farrukh Jamil, Murid Hussain, Maria Mustafa, Rashid Ur Rehman, Abrar Inayat, Muhammad Salman Habib, Muhammad Sajid
Summary: The spin crossover potential of transition metals has revolutionized the design of magnetic optoelectronic materials. Extensive work has been done to develop spin crossover materials (SCO) with tunable properties such as electrical and fluorescence for applications in sensors, memory devices, and molecular switches. The potential of SCO-conductive materials and SCO-fluorescent materials is summarized, showing their potential in the fabrication of optoelectronic materials.
Article
Nanoscience & Nanotechnology
Nabilah Al-Ansi, Abdulwahab Salah, Zhen-Yi Gu, Qasem A. Drmosh, Guo-Duo Yang, Jia-Yu Zhang, Muhammad Sajid, Xing-Long Wu, Jing-Ping Zhang, Liang Zhao, Hai-Zhu Sun
Summary: Researchers have developed a hybrid composite by coating MoO3 nanorods with TiO2, significantly improving the cycling stability and electrochemical performance in Li/Na-ion batteries. The optimized electrode achieves impressive capacity and cycling performance in both lithium-ion and sodium-ion batteries.
ACS APPLIED NANO MATERIALS
(2023)
Editorial Material
Biotechnology & Applied Microbiology
Muhammad Sajid, Juliana Heloisa Pine Americo-Pinheiro, Abdul Raheem, Muhammad Mohsin Azim
FRONTIERS IN CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Yasir Zaman, Muhammad Zahid Ishaque, Yasir Yousaf, Muhammad Shahzad, Abu Bakar Siddique, Muhammad Imran Arshad, Muhammad Sajid, Nisar Ali, Ghulam Nabi
Summary: Dilute magnetic semiconductor Zn1-xCuxO nanorods were prepared and their physical properties, antibacterial activity, and photocatalytic activity were investigated. The dopant concentration influenced the absorbance spectra and crystallinity of the nanorods. The Cu-doped ZnO nanorods exhibited ferromagnetic behavior and showed efficient photocatalytic degradation of methyl orange dye under visible light. The nanorods also demonstrated antibacterial potential, with smaller size nanorods being more effective against gram-negative bacteria. However, a slight decrease in catalytic potential was observed during recycling experiments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Walid Tahri, Xu Zhou, Rashid Khan, Muhammad Sajid
Summary: This article summarizes the key technologies and advanced methods for hydrogen production through electrocatalytic seawater splitting. The direct seawater electrolysis technique, which uses seawater instead of highly purified water, shows great potential for vast applications. The paper also discusses in detail the new technologies and application progress of transition metal phosphide-based seawater electrolysis catalysts, highlighting the challenges and opportunities faced.
Article
Engineering, Environmental
Shahi Mulk, Muhammad Sajid, Lei Wang, Feng Liu, Gang Pan
Summary: This study investigated the synthesis of 5-hydroxymethylfurfural (HMF) from excess sucrose using an environmentally friendly and cost-effective technology. The results showed that the combination of p-toluenesulfonic acid and chromium chloride was the most effective dehydrating catalyst, with temperature, time, and concentration affecting the yields. The isomerization of glucose to fructose was identified as a major barrier to achieving high process yields.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
