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On ℓ2–ℓ∞ output-feedback control scheduled by stochastic communication protocol for two-dimensional switched systems

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International Journal of Systems science 2021年第14期52卷 2961-2976页

作者： Kaiqun Zhu Jun Hu Yurong Liu Naif D. Alotaibi Fuad E. Alsaadi a Department of Control Science and Engineering University of Shanghai for Science and Technology Shanghai People's Republic of China b Department of Mathematics Harbin University of Science and Technology Harbin People's Republic of China c Department of Mathematics Yangzhou University Yangzhou People's Republic of Chinad School of Mathematics and Physics Yancheng Institute of Technology Yancheng People's Republic of China e Department of Electrical and Computer Engineering Faculty of Engineering King Abdulaziz University Jeddah Saudi Arabia

This paper is concerned with theℓ2–ℓ∞output-feedback control problem for a class of two-dimensional (2-D) switched systems described by the general Fornasini–Marchesini second model under the stochastic communication protocol (SCP). In a networked 2-D switched control system, the sensors and the controller are typically connected through a shared communication network of limited bandwidth, which is likely to result in data collision problem. To circumvent this network-induced problem, a new SCP is dedicatedly put forward for the 2-D switched system in order to orchestrate the transmission order of sensor nodes, under which only one sensor node obtains the privilege to access the network at each transmission instant. Then, based on the nominal system information compensation, a set of new mode-dependent output-feedback controllers is designed for 2-D switched systems subject to SCP and external disturbances. Moreover, using the average dwell-time approach, sufficient conditions are established to ensure the existence of the desired controllers that guarantee both the exponential mean-square stability and theℓ2–ℓ∞performance. Finally, a numerical example is presented to demonstrate the effectiveness of the proposed controller design method.

关键词： Two-dimensional switched systems Fornasini–Marchesini second model average dwell-time ℓ2– ℓ∞ control stochastic communication protocol

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Interactions between invasive plants and heavy metal stresses:a review

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Journal of Plant Ecology 2022年第3期15卷 429-436页

作者： Jian Li Zhanrui Leng Yueming Wu Yizhou Du Zhicong Dai Asim Biswas Xiaojun Zheng Guanlin Li Esawy Kasem Mahmoud Hui Jia Daolin Du Institute of Environment and Ecology Institute of Environmental Health and Ecological SecuritySchool of the Environment and Safety EngineeringJiangsu UniversityZhenjiang 212013China Key Laboratory of Original Agro-Environmental Pollution Prevention and Control Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Product SafetyAgro-Environment Protection InstitutionMinistry of Agriculture and Rural AffairsTianjin 300191China Faculty of Engineering School of Computer ScienceUniversity of SydneyDarlingtonNSW 2008Australia School of Environmental Sciences University of GuelphGuelphON N1G 2W1Canada Department of Soil and Water Science Faculty of AgricultureTanta UniversityTantaEgypt

Global changes have altered the distribution pattern of the plant communities,including invasive *** contamination may reduce native plant resistance to the invasive ***,the focus of the current review is on the contaminant biogeochemical behavior among native plants,invasive species and the soil within the plant-soil ecosystem to improve our understanding of the interactions between invasive plants and environmental *** studies together with synthesis of the literature showed that(i)the impacts of invasive species on environmental stress were heterogeneous,(ii)the size of the impact was variable and(iii)the influence types were multidirectional even within the same impact ***,invasive plants showed self-protective mechanisms when exposed to heavy metals(HMs)and provided either positive or negative influence on the bioavailability and toxicity of *** the other hand,HMs may favor plant invasion due to the widespread higher tolerance of invasive plants to HMs together with the‘escape behavior’of native plants when exposed to toxic HM ***,there has been no consensus on whether elemental compositions of invasive plants are different from the natives in the polluted regions.A quantitative research comparing plant,litter and soil contaminant contents between native plants and the invaders in a global context is an indispensable research focus in the future.

关键词： environmental stresses heavy metals plant invasion biogeochemical cycle mechanisms

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Biodegradation of Benzo[A]Pyrene By a Marine Chlorella Vulgaris Lh-1 with Heterotrophic Ability

SSRN

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SSRN 2023年

作者： Chen, Qingguo Li, Zhenzhen Li, Yijing Liu, Mei Wu, Yingqi Chen, Zhi Zhu, Baikang Zhejiang Provincial Key Laboratory of Petrochemical Pollution Control Zhejiang Ocean University Zhoushan China National & local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology Zhejiang Ocean University Zhoushan316022 China School of Marine Science & Technology Zhejiang Ocean University Zhoushan China Department of Building Civil and Environmental Engineering Faculty of Engineering & Computer Sciences Concordia University MontrealQCH3G1M8 Canada

In this study, a microalga, Chlorella vulgaris LH-1, with heterotrophic ability to degrade benzo[a]pyrene (BaP) was explored. The effect of BaP concentration on microalga growth was investigated, and the possible biodegradation mechanism of BaP was proposed. Results showed that 5 mg/L had a significant inhibitory effect on its growth. During heterotrophic cultivation, 20 mg/L BaP inhibited its growth significantly. The expression of functional enzyme genes of LH-1 such as phenol 2-monooxygenase activity, protocatechuate 3,4-dioxygenase activity, catechol 1,2-dioxygenase activity, styrene degradation, and benzoate degradation were upregulated in the process of BaP degradation. The degradation of BaP by this microalga under mixotrophic condition goes through the degradation pathway of phthalic acid, whereas it goes through the degradation pathway of benzoic acid under heterotrophic condition. © 2023, The Authors. All rights reserved.

关键词： Biodegradation

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An analytical drain current model for dual-material gate graded-channel and dual-oxide thickness cylindrical gate (DMG-GC-DOT) MOSFET

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Nanoscience and Nanotechnology - Asia 2019年第2期9卷 291-297页

作者： Jaafar, Hind Aouaj, Abdellah Bouziane, Ahmed Iñiguez, Benjamin Faculty of Science and Technology Laboratory of Automatic Conversion of Energy and Microelectronics University Sultan Moulay Slimane Beni Mellal Morocco Department of Electronic Electrical and Automatic Control Engineering Universitat Rovira i Virgili Av Paisos Catalans 26 Tarragona43007 Spain

Background: A novel Dual Material Gate Graded Channel and Dual Oxide Thickness Cylindrical Gate (DMG-GC-DOT) MOSFET is presented in this paper. Methods: Analytical model of drain current is developed using a quasi-two-dimensional cylindrical form of the Poisson equation and is expressed as a function of the surface potential, which is calculated using the expressions of the current density. Results: Comparison of the analytical results with 3D numerical simulations using Silvaco Atlas-TCAD software presents a good agreement from subthreshold to strong inversion regime and for different bias voltages. Conclusion: Two oxide thicknesses with different permittivity can effectively improve the subthreshold current of DMG-GC-DOT MOSFET. © 2019 Bentham science Publishers.

关键词： Drain current

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Combining Trajectory Data with Analytical Lyapunov Functions for Improved Region of Attraction Estimation

arXiv

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arXiv 2021年

作者： Lugnani, Lucas Jones, Morgan Alberto, Luís F.C. Peet, Matthew Dotta, Daniel Faculty of Electrical and Computer Engineering University of Campinas Brazil The Department of Automatic Control and Systems Engineering University of Sheffield United Kingdom The São Carlos Engineering School University of São Paulo São Carlos Brazil The School for the Engineering of Matter Transport and Energy Arizona State University Tempe United States

The increasing uptake of inverter based resources (IBRs) has resulted in many new challenges for power system operators around the world. The high level of complexity of IBR generators makes accurate classical model-based stability analysis a difficult task. This paper proposes a novel methodology for solving the problem of estimating the Region of Attraction (ROA) of a nonlinear system by combining classical model based methods with modern data driven methods. Our method yields certifiable inner approximations of the ROA, typical to that of model based methods, but also harnesses trajectory data to yield an improved accurate ROA estimation. The method is carried out by using analytical Lyapunov functions, such as energy functions, in combination with data that is used to fit a converse Lyapunov function. Our methodology is independent of the function fitting method used. In this work, for implementation purposes, we use Bernstein polynomials to function fit. Several numerical examples of ROA estimation are provided, including the Single Machine Infinite Bus (SMIB) system, a three machine system and the Van-der-Pol system. Copyright © 2021, The Authors. All rights reserved.

关键词： Lyapunov functions

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Cache-Assisted Content Delivery for NOMA-Based Satellite-Edge-Terminal Cooperation Networks

Cache-Assisted Content Delivery for NOMA-Based Satellite-Edg...

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IEEE Conference on Global Communications (GLOBECOM)

作者： Chao Fang Hang Xu Yingshan Li Haofei Xie Shu-Ming Tseng Zheng Yang Deze Zeng Faculty of Information Technology Beijing University of Technology Beijing China Purple Mountain Laboratories Nanjing China Key Laboratory of Industrial Internet of Things & Networked Control Chongqing University of Posts and Telecommunications Chongqing China Department of Electronic Engineering National Taipei University of Technology Taipei Taiwan Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education Fujian Normal University Fuzhou China School of Computer Science China University of Geosciences Wuhan China

To satisfy differentiated service requirements of delay-sensitive and computing-intensive tasks in satellite communication networks, we propose a cache-assisted low-latency content distribution scheme in multi-cell multi-carrier nonorthogonal multiple access (MCMC-NOMA)-based satellite-edge-terminal cooperation environments. In the paper, a delay minimization problem is formulated to achieve optimal content distribution by jointly optimizing the allocation of subchannels and transmit power, which is decomposed and solved in each slot by using many-to-one matching and successive convex approximation, respectively. Simulation results show that the proposed model significantly improve network latency and content distribution in comparison to its existing counterparts in cloud-edge-terminal cooperation networks.

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Experimental verification of group non-membership in optical circuits

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Photonics Research 2021年第9期9卷 1745-1751页

作者： KAI SUN ZI-JIAN ZHANG FEI MENG BIN CHENG ZHU CAO JIN-SHI XU MAN-HONG YUNG CHUAN-FENG LI GUANG-CAN GUO CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Department of Computer Science The University of Hong KongPokfulamHong Kong SARChina Centre for Quantum Software and Information Faculty of Engineering and Information TechnologyUniversity of Technology SydneySydneyNSW 2007Australia Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and TechnologyShanghai 200237China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Key Laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

The class quantum Merlin–Arthur(QMA),as the quantum analog of nondeterministic polynomial time,contains the decision problems whose YES instance can be verified efficiently with a quantum *** problem of deciding the group non-membership(GNM)of a group element is conjectured to be a member of *** works on the verification of GNM,which still lacks experimental demonstration,required a quantum circuit with O(n~5)group oracle ***,we provide an efficient way to verify GNM problems,in which each quantum circuit only contains O(1)group of oracle calls,and the number of qubits in each circuit is reduced by *** on this protocol,we then experimentally demonstrate the new verification process with a four-element group in an all-optical *** new protocol is validated experimentally by observing a significant completeness-soundness gap between the probabilities of accepting elements in and outside the *** work efficiently simplifies the verification of GNM and is helpful in constructing more quantum protocols based on the near-term quantum devices.

关键词： quantum element polynomial

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Optimal Wildfire Escape Route Planning for Drones under Dynamic Fire and Smoke

Optimal Wildfire Escape Route Planning for Drones under Dyna...

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International IEEE Conference on Signal-Image Technologies and Internet-Based System

作者： Chang Liu Tamas Sziranyi Department of Networked Systems and Services Budapest University of Technology and Economics Műegyetem rkp. 3H-1111 Budapest Hungary Machine Perception Research Laboratory of HUN-REN Institute for Computer Science and Control (SZTAKI) H-1111 Budapest Kende u. 13-17 Hungary Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics (BME-KJK) Műegyetem rkp. 3 Budapest Hungary

In recent years, the increasing prevalence and intensity of wildfires have posed significant challenges to emergency response teams. The utilization of unmanned aerial vehicles (UAVs), commonly known as drones, has shown promise in aiding wildfire management efforts. This work focuses on the development of an optimal wildfire escape route planning system specifically designed for drones, considering dynamic fire and smoke models. First, the location of the source of the wildfire can be well located by information fusion between UAV and satellite, and the road conditions in the vicinity of the fire can be assessed and analyzed using multichannel remote sensing data. Second, the road network can be extracted and segmented in real time using UAV vision technology, and each road in the road network map can be given priority based on the results of road condition classification. Third, the spread model of dynamic fires calculates the new location of the fire source based on the fire intensity, wind speed and direction, and the radius increases as the wildfire spreads. Smoke is generated around the fire source to create a visual representation of a burning fire. Finally, based on the improved A* algorithm, which considers all the above factors, the UAV can quickly plan an escape route based on the starting and destination locations that avoid the location of the fire source and the area where it is spreading. By considering dynamic fire and smoke models, the proposed system enhances the safety and efficiency of drone operations in wildfire environments.

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Interval type-3 fuzzy Wiener model for nonlinear dynamic systems: Application to continuous stirred tank reactor

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Chaos, Solitons and Fractals 2025年 199卷

作者： Khalifa, Tarek R. Yu, Xian Sharafian, Amin Zhong, Xiaopin Wu, Zongze College of Mechatronics and Control Engineering Shenzhen University Guangdong Shenzhen518060 China College of Computer Science and Software Engineering Shenzhen University Guangdong Shenzhen518060 China Department of Industrial Electronics and Control Engineering Faculty of Electronic Engineering Menoufia University Menoufia Menouf32952 Egypt Shenzhen University Guangdong Shenzhen518060 China

This paper proposes a novel interval type-3 Takagi–Sugeno–Kang fuzzy Wiener model (IT3TSK-FWM) to address the challenge of modeling nonlinear dynamic systems with complex uncertainties. The proposed model adopts a Wiener structure, where the linear dynamic part is represented by an autoregressive moving average (ARMA) system and the nonlinear static part is represented by an IT3TSK fuzzy system. First, we introduce a novel rule firing strength-based algorithm to eliminate the dependency on predefined structures, allowing the proposed IT3TSK-FWM to adapt its structure online. Then, we introduce a novel Lyapunov-based learning algorithm to ensure convergence of the estimation error to zero. Furthermore, we employ a direct defuzzification method to enhance computational efficiency. Finally, the effectiveness of the IT3TSK-FWM is demonstrated through its application to a continuous stirred tank reactor system, validating the model's robustness and performance in handling nonlinear dynamics. © 2025 Elsevier Ltd

关键词： Continuous stirred tank reactor (CSTR) Interval type-3 fuzzy systems Nonlinear dynamic systems Parameter learning Structure learning

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Correction to: Global existence and stability of Nicholson blowflies model with harvesting and random effect

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Nonlinear Dynamics 2022年第4期108卷 4629-4629页

作者： Abbas, Syed Niezabitowski, Michal Grace, Said R. School of Basic Sciences Indian Institute of Technology Mandi Mandi India Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland Department of Engineering Mathematics Faculty of Engineering Cairo University Giza Egypt

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