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A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

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Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng Li Wei Yue Nam‑Young Kim Yang Li Guozhen Shen Jong‑Chul Lee Department of electronic Convergence engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of electronic engineering Kwangwoon UniversitySeoul 01897South Korea school of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and systems Fudan UniversityShanghai 200433People’s Republic of China school of Integrated Circuits and electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

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Space-surface bistatic synthetic aperture radar with navigation satellite transmissions: a review

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Science China(Information Sciences) 2015年第6期58卷 5-24页

作者： ANTONIOU Michail CHERNIAKOV Mikhail MA Hui electronic Electrical and Systems Engineering Department University of Birmingham school of electronic and Information engineering Beihang University

This paper reviews the theory and practice of Space-Surface Bistatic Synthetic Aperture Radar(SS-BSAR) using navigation satellites as transmitters. In recent years, this innovative technology has reached a maturity stage which allows it to be considered for a wide range of applications. The paper covers the fundamental aspects of this technology as a radar system, such as the resolution, power budget and Point Spread Function(PSF) analysis, as well as its signal processing aspects and the state of the art in terms of advanced SAR techniques that it enables. Finally, the theoretical aspects of the paper may be directly transferred to the more generic SS-BSAR concept.

关键词： bistatic synthetic aperture radar GNSS-based SAR space-surface bistatic SAR coherent change detection multi-perspective imaging

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A robust optimization method for energy management of CCHP microgrid

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Journal of Modern Power systems and Clean Energy 2018年第1期6卷 132-144页

作者： Zhao LUO Wei GU Zhi WU Zhihe WANG Yiyuan TANG school of electrical engineering Southeast University school of electronic Electrical and Systems EngineeringUniversity of Birmingham

Energy management is facing new challenges due to the increasing supply and demand uncertainties,which is caused by the integration of variable generation resources,inaccurate load forecasts and non-linear efficiency *** meet these challenges,a robust optimization method incorporating piecewise linear thermal and electrical efficiency curve is proposed to accommodate the uncertainties of cooling,thermal and electrical load,as well as photovoltaic(PV)output *** study results demonstrate that the robust optimization model performs better than the deterministic optimization model in terms of the expected operation *** fluctuation of net electrical load has greater effect on the dispatching results of the combined cooling,heating and power(CCHP)microgrid than the fluctuation of the cooling and thermal *** day-ahead schedule is greatly affected by the uncertainty budget of the load *** economy of the optimal decision could be achieved by adjusting different uncertainty budget levels according to control the conservatism of the model.

关键词： Combined cooling Heating and power(CCHP) Microgrid Piecewise linear Robust optimization Uncertainty

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Passive GNSS-based SAR imaging and opportunities using Galileo E5 signals

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Science China(Information Sciences) 2015年第6期58卷 84-94页

作者： MA Hui ANTONIOU Michail CHERNIAKOV Mikhail school of electronic and Information engineering Beihang University electronic Electrical and Systems Engineering Department University of Birmingham

This paper investigates the feasibility of Galileo navigation satellites as transmitters of opportunity in passive bistatic synthetic aperture radar(SAR) systems from the perspectives of signal processing and experiment program. Experimental images obtained using a single Galileo channel, E5 a or E5 b, are presented and analyzed. The paper also puts forward the channel combination scheme to jointly process E5 a and E5 b channels, which brings up high-resolution possibilities for passive SAR technique. By employing the entire E5 band for imaging, the range resolution may be potentially increased by up to 5 times. Preliminary experimental results for this concept are demonstrated.

关键词： bistatic synthetic aperture radar(BSAR) GNSS-based SAR Galileo E5 channel combination

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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo Yun Chen Hao Zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of Precision electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China school of Electromechanical engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China school of Materials Science and engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

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Review on Optimization of Forecasting and Coordination Strategies for Electric Vehicle Charging

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Journal of Modern Power systems and Clean Energy 2023年第2期11卷 389-400页

作者： Zixuan Jia Jianing Li Xiao-Ping Zhang Ray Zhang Department of electronic Electrical and Systems EngineeringSchool of EngineeringUniversity of BirminghamBirminghamUnited Kingdom

The rapid development of electric vehicles(EVs)has benefited from the fact that more and more countries or regions have begun to attach importance to clean energy and environmental *** paper focuses on the optimization of EV charging,which cannot be ignored in the rapid development of *** increase in the penetration of EVs will generate new electrical loads during the charging process,which will bring new challenges to local power ***,the uncoordinated charging of EVs may increase the peak-to-valley difference in the load,aggravate harmonic distortions,and affect auxiliary *** stabilize the operations of power grids,many studies have been carried out to optimize EV *** paper reviews these studies from two aspects:EV charging forecasting and coordinated EV charging *** analyses are carried out to identify the advantages and disadvantages of different methods or *** the end of this paper,recommendations are given to address the challenges of EV charging and associated charging strategies.

关键词： Electric vehicle(EV) forecasting aggregator coordination strategy smart charging

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A novel coordinated control strategy considering power smoothing for a hybrid photovoltaic/battery energy storage system

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Journal of Central South University 2016年第2期23卷 394-404页

作者： DAUD Muhamad Zalani MOHAMED Azah HANNAN M A school of Ocean engineering Universiti Malaysia Terengganu Department of electrical Electronicand Systems EngineeringUniversiti Kebangsaan Malaysia

This work presents a novel coordinated control strategy of a hybrid photovoltaic/battery energy storage(PV/BES) system. Different controller operation modes are simulated considering normal, high fluctuation and emergency conditions. When the system is grid-connected, BES regulates the fluctuated power output which ensures smooth net injected power from the PV/BES system. In islanded operation, BES system is transferred to single master operation during which the frequency and voltage of the islanded microgrid are regulated at the desired level. PSCAD/EMTDC simulation validates the proposed method and obtained favorable results on power set-point tracking strategies with very small deviations of net output power compared to the power set-point. The state-of-charge regulation scheme also very effective with SOC has been regulated between 32% and 79% range.

关键词： photovoltaic power smoothing battery energy storage state-of-charge control islanded microgrid

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Novel Diplexer with Improved Isolation Using Asymmetric Transmission Zeros Technique

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Chinese Journal of electronics 2016年第3期25卷 591-594页

作者： CHEN Fuchang HU Haotao QIU Jieming GUO Mofei CHU Qingxin school of electronic and Information engineering South China University of Technology school of electronics Electrical and Systems Engineeringthe University of Birmingham

High isolation and compact size diplexer with two cascaded triplet sections is presented in this paper. By using the quarter-wavelength resonators and stepped impedance resonator to form cascaded triplets,size reduction is achieved. By exploiting different coupling between the resonators, multiple transmission zeros can be obtained to improved the isolation between the two channels. An experimental diplexer with lower and upper channels centered at 1.8GHz and 2.2GHz is designed to verify the proposed theory. Without extra matching network, the proposed diplexer shows high isolation of greater than 41dB.

关键词： Diplexer Bandpass filter Microstrip Transmission zero Isolation

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Finite-time command filtered adaptive control for nonlinear systems via immersion and invariance

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Science China(Information Sciences) 2021年第9期64卷 151-164页

作者： Jinpeng YU Peng SHI Xinkai CHEN Guozeng CUI school of Automation Qingdao University school of electrical and electronic engineering The University of Adelaide Department of electronic and Information systems Shibaura Institute of Technology school of electronic and Information engineering Suzhou University of Science and Technology

This paper investigates the problem of finite-time adaptive output tracking control for strictfeedback nonlinear systems with parametric uncertainties. Command signals and their derivatives are generated by a new command filter based on a second-order finite-time differentiator, which attenuates the chattering phenomenon. The parameter estimations are achieved by an immersion and invariance approach without requiring the certainty equivalence principle. The finite-time adaptive controller is constructed via a backstepping design method, a finite-time command filter, and a modified fractional-order error compensation mechanism. The proposed control strategy guarantees the finite-time boundedness of all signals in the closed-loop system, and the tracking error is driven into an arbitrarily small neighborhood of the origin in finite time. Finally, the new design technique is validated in a simulation example of the electromechanical system.

关键词： adaptive control finite-time control command-filtered backstepping immersion and invariance

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Mutator for transferring a memristor emulator into meminductive and memcapacitive circuits

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Chinese Physics B 2014年第7期23卷 366-376页

作者：于东升梁燕 Herbert H.C.Iu 胡义华 school of Information and electrical engineering China University of Mining and Technology school of electrical Electronic and Computer EngineeringThe University of Western Australia school of electronic and electrical engineering University of Strathclyde

In this paper, a concise but effective interface circuit for transforming a memristor into meminductive and memcapac- itive systems is designed. This newly proposed interface circuit, constructed by only two current conveyors, is equipped with three available ports, which can provide six connecting combinations in terms of one resistor, one capacitor, and one memristor. For the sake of confirming the design effectiveness, theoretical and simulation discussions are hence introduced and all the experimental waveforms provide conclusive evidence to validate the correctness of these new mutators. The most attractive features of this new interface circuit are the floating terminals and convenient practical implementation.

关键词： memristor meminductive memcapacitive self-excited oscillator

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