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Backstepping-based active fault-tolerant control for a class of uncertain SISO nonlinear systems

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Journal of Systems Engineering and Electronics 2009年第6期20卷 1263-1270页

作者： meng Lingya Jiang bin Coll. of Automation Engineering Nanjing Univ. of Aeronautics and Astronautics Nanjing 210016 P. R. China Coll. of Information and Control Engineering China Univ. of Petroleum Dongying 257061 P. R. China

Active fault-tolerant control is investigated for a class of uncertain SISO nonlinear flight control systems based on the adaptive observer, feedback linearization and backstepping *** an adaptive observer is constructed to estimate the fault in the faulty system.A new fault updating law is presented to simplify the assumption conditions of the adaptive *** asymptotical stability of the observer and the uniform ultimate boundedness of the fault estimation error are guaranteed by Lyapunov *** a backstepping-based active fault-tolerant controller is designed for the faulty *** asymptotical stability of the closed-loop system and uniform ultimate boundedness of the tracking error are proved based on Lyapunov *** effectiveness of the proposed scheme is demonstrated through the numerical simulation of a flight control system.

关键词： fault-tolerant control fault diagnosis nonlinear backstepping adaptive observer flight control.

Characteristic model-based consensus of networked heterogeneous robotic manipulators with dynamic uncertainties

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Science China(Technological Sciences) 2016年第1期59卷 63-71页

作者： WANG LiJiao meng bin Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control Engineering

In this paper, we address the characteristic model-based discrete-time consensus problem of networked robotic manipulators with dynamic uncertainties. The research objective is to achieve joint-position consensus of multiple robotic agents interconnected on directed graphs containing a spanning tree. A novel characteristic model-based distributed adaptive control scenario is proposed with a state-relied projection estimation law and a characteristic model-based distributed controller. The performance analysis is also unfolded where the uniform ultimate boundedness(UUB) of consensus errors is derived by resorting to the discrete-time-domain stability analysis tool and the graph theory. Finally, numerical simulations illustrate the effectiveness of the proposed theoretical strategy.

关键词： networked robotic manipulators consensus discrete time characteristic model distributed adaptive controller uniform ultimate boundedness(UUB)

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第1期68卷 369-376页

作者： Song-meng Wang Hao Nian Yan-Fang Wang Li-Shuo Zheng Yu-Tao Zheng Yi-Wei Dong Liping Huang Xiaoping Wang Wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

关键词： host-guest interaction hydrophobic effect endo-functionalized cavity mutation pyridine

Surface modifications of layered LiNi_(x)Mn_(y)Co_(z)O_(2)cathodes via atomic and molecular layer deposition

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Rare Metals 2023年第7期42卷 2121-2156页

作者： Xin Wang xiang-Bo meng Department of Mechanical Engineering University of ArkansasFayettevilleAR72701USA

Currently,there has an ever-growing interest in layered LiNi_(x)Mn_(y)Co_(z)O_(2)(NMCs,x+y+z=1)cathode materials for lithium-ion batteries(LIBs)and lithium metal batteries(LMBs),due to their low cost and high ***,they still suffer from a series of issues,such as Li/Ni cation mixing,irreversible phase transition,and transition metal *** issues result in severe capacity degradation and limited cyclability of ***,atomic and molecular layer deposition(ALD and MLD)have emerged as a novel tool to tackle these issues,featuring their unique capabilities to fine-tailor NMCs'surfaces for stable interfaces and improved electrochemical performance in LIBs and *** this review,we specially summarize the recent advances of different ALD and MLD coatings on NMCs and discuss their working *** expect that this review will stimulate more efforts to further develop better NMCs using novel ALD/MLD coatings.

关键词： Lithium-ion batteries(LIBs) Lithium metal batteries(LMBs) NMC cathodes Atomic layer deposition(ALD) Molecular layer deposition(MLD) Surface coating

2D hetero-structures based on transition metal dichalcogenides:fabrication,properties and applications

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Science Bulletin 2017年第16期62卷 1148-1161页

作者： Ping Liu bin xiang Department of Materials Science&Engineering CAS Key Lab of Materials for Energy Conversionand Synergetic Innovation Center of Quantum Information&Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Recently,two dimensional transition metal dichalcogenides MX_2(M = Mo,W,etc; X = S,Se,Te) have ignited immense interests because of their unique structural and physical properties for the potential applications in the nano-optoelectronics,valley-spintronics etc. In terms of the structural compatibility and van der Waals interaction,two dimensional(2D) MX_2 layers can be fabricated into various lateral and vertical hetero-structures. The atomically-thin hetero-structures comprising different layered MX_2 provide a new platform for exploring fundamental physics and device technologies with unprecedented phenomenon and extraordinary functionalities. In this review,we report the recent progress about the fabrication,properties and applications of 2D hetero-structures based on transition metal dichalcogenides.

关键词： Transition metal dichalcogenides Hetero-structures Chemical vapor deposition Charge transfer Optoelectronic devices

Merging bound states in the continuum in an open acoustic resonator

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun Huang bin Jia Artem S.Pilipchuk Sibo Huang Chen Shen Almas F.Sadreev Yong Li Andrey E.Miroshnichenko School of Physics and Electronic Sciences East China Normal University Institute of Acoustics Tongji University L.V.Kirensky Institute of Physics Department of Mechanical Engineering Rowan University School of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and Friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of Fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Subnetwork-based federated few-shot semantic segmentation of organ images

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Optoelectronics Letters 2025年

作者： Wu Junpeng Zhao meng Zhang Huanping Key Laboratory of Computer Vision and System of Ministry of Education， School of Computer Science and Engineering， Tianjin University of Technology

Federated learning(FL)， as a distributed learning paradigm， allows multiple medical institutions to collaborate on learning without the need to centralize all client data. However， existing methods pay little attention to more challenging medical image semantic segmentation tasks， especially in the scenario of the imbalanced dataset in federated few-shot learning. In this paper， we propose a subnetwork-based federated few-shot organ image segmentation method. Firstly， individual clients train using local training samples and then upload local model gradients to the server. The server utilizes their respective local model gradients to update the subnetwork maintained on the server and generate aggregation weights for forming personalized model parameters. Through this method， we can learn the similarities between different clients to address data heterogeneity issues. In addition， to enhance the communication efficiency between clients and the server， we have also designed a personalized layer aggregation strategy， which only transmits partial layer model parameters during the communication process to improve communication efficiency. Finally， we conducted experiments on ABD-MRI and ABD-CT datasets to demonstrate the effectiveness of our method.

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An efficient lossy link localization approach for wireless sensor networks

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Frontiers of Information Technology & Electronic Engineering 2017年第5期18卷 689-707页

作者： Wen-yan CUI xiang-ru meng bin-feng YANG Huan-huan YANG Zhi-yuan ZHAO College of Information and Navigation Air Force Engineering UniversityXi'an 710077China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China PLA of 94543 lining 272000China

Network fault management is crucial for a wireless sensor network(WSN) to maintain a normal running state because faults(e.g., link failures) often occur. The existing lossy link localization(LLL) approach usually infers the most probable failed link set first, and then gives the fault hypothesis set. However, the inferred failed link set contains many possible failures that do not actually occur. That quantity of redundant information in the inferred set can pose a high computational burden on fault hypothesis inference, and consequently decreases the evaluation accuracy and increases the failure localization time. To address the issue, we propose the conditional information entropy based redundancy elimination(CIERE), a redundant lossy link elimination approach, which can eliminate most redundant information while reserving the important information. Specifically, we develop a probabilistically correlated failure model that can accurately reflect the correlation between link failures and model the nondeterministic fault propagation. Through several rounds of mathematical derivations, the LLL problem is transformed to a set-covering problem. A heuristic algorithm is proposed to deduce the failure hypothesis set. We compare the performance of the proposed approach with those of existing LLL methods in simulation and on a real WSN, and validate the efficiency and effectiveness of the proposed approach.

关键词： Lossy link localization Redundancy eliminating algorithm Set-covering Wireless sensor networks(WSNs) Network diagnosis

Facile and One-step Direct Synthesis of Poly(valine)as a Robust Drug Nanocarrier for Enhanced Breast Cancer Therapy

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Chinese Journal of Polymer Science 2022年第9期40卷 1016-1027页

作者： Ya-bin meng Jun Wu School of Biomedical Engineering Sun Yat-sen UniversityShenzhen 518107China

Synthetic poly(amino acid)s with good biodegradable and biocompatible properties have attracted increased attention as carriers in biomedical applications in recent years,their synthesis and purification procedures are usually complicated and some by-products would occur *** this,polypeptide with good biodegradable and biocompatible properties is prepared and optimized by one-step and direct synthesis strategy and poly(valine)(PVal)is selected here as a model polypeptide in this *** newly generated PVal can self-assemble into poly(valine)nanoparticles(PVal-NPs)with a high drug-loading capacity(>20 wt%)of doxorubicin(DOX)and shows strong cytotoxicity against 4T1 *** cellular internalization,the release of DOX could be accelerated by the endosomal acidic environment which leads to enhanced anticancer *** results in vivo show that DOX@PVal-NPs have a long blood circulation time,high cancer accumulation and penetration,and good therapeutic performance in 4T1 tumor-bearing mice without causing obvious adverse effect on main *** these combined advantages,these PVal-based nanoplatform would provide an effective drug delivery tool for clinical breast cancer therapy.

关键词： Poly(amino acid) Nanoparticle Drug carrier Doxorubicin Breast cancer