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17th Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, SPAWDA 2023

作者： Hu, Zijian Sun, Changhe School of Electronic Information and Electrical Engineering Yangtze University Jingzhou434023 China Chongqing University Key Laboratory of Optoelectronic Technology & Systems Ministry of Education Chongqing400044 China

ISBN: (纸本)9798350394740

Welded structures have been widely used in automotive production, aerospace, construction industry and other fields. With the trend of industrial welded structures becoming larger and thicker, it is of very importance to test the weld quality of the medium-thickness steel plates above 25 mm for ensuring the safety and reliability of the weld structures. In this paper, a multi-channel piezoelectric ultrasonic transducer array has been developed for detecting the sub-millimeter defects inside medium-thickness steel plates. Both the electrical impedance analysis and ultrasonic pulse echo test characterization show that the theoretical design model can effectively guide the design of the ultrasonic transducer array design. Besides, a standard butt-welded steel plate was tested for weld defects with a minimum feature size of 0.5 mm, and the results show that the developed multi-channel piezoelectric ultrasonic transducer array can accurately detect sub-millimeter weld defects, with a detection resolution of better than 0.5mm. © 2023 IEEE.

关键词： Defects

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Application of EEG and EMG Signals in Multi-Classification of Epilepsy 5

Application of EEG and EMG Signals in Multi-Classification o...

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5th IEEE International Conference on Pattern Recognition and Machine Learning, PRML 2024

作者： Liang, Jiahui Wang, Guangming Jia, Shanshan Wang, Dong Wang, Gang Xi'an Jiaotong University Key Laboratory of Biomedical Information Engineering Ministry of Education School of Life Science and Technology Xi'an China Xi'an Children's Hospital Department of Neurology Xi'an China

ISBN: (纸本)9798350355925

The classification of epileptic seizures is crucial for the treatment of epilepsy, and currently, this task primarily relies on clinical doctors, which is complex and time-consuming. Our study aims to perform an eight-category classification of epileptic seizures using multi-domain features from electroencephalogram (EEG) and electromyogram (EMG) signals, combined with deep learning algorithms. In this research, EEG signals are decomposed via the Variational Mode Decomposition (VMD) method and features are extracted in the time domain, frequency domain, and from information theory, while EMG signals are processed to extract relevant features directly. Following feature fusion, the Resnet model is employed for classification. Under the evaluation criteria based on seizure events and across subjects, the accuracy of the eight-category classification of seizures is 75%, with a weighted F1 score of 0.75, where the accuracy and recall for Tonic-Clonic Seizures are 100%. Moreover, in this task, we also compared the classification effects using only EEG signals and using both EEG and EMG signals, as well as the performance differences between machine learning models and deep learning models. The results indicate that the classification performance is optimized when both EEG and EMG signals are used in conjunction with a neural network model. © 2024 IEEE.

关键词： Frequency domain analysis

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Realizing high power factor in p-type BiSbTe flexible thin films via carrier engineering

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稀有金属（英文版） 2025年第2期44卷 1222-1230页

作者： Dong-Wei Ao Bo Wu Wei-Di Liu Xiang-Bo Shen Wen-Qing Wei School of Machinery and Automation Weifang UniversityWeifang 261061China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Shenzhen Key Laboratory of Advanced Thin-Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Centre for Materials Science School of Chemistry and PhysicsARC Research Hub in Zero-Emission Power Generation for Carbon NeutralityQueensland University of TechnologyBrisbaneQLD 4000Australia School of Machinery and Automation Weifang UniversityWeifang 261061China

Flexible thermoelectric thin films offer a promising avenue for the development of portable and sustainable flexible power ***,a lack of thin films with excellent performance restricts their application in flexible thermoelectric *** this study,high-per-formance BiSbTe films are successfully prepared using a combination of magnetron sputtering and thermal *** optimizing carrier concentration to～4.47 × 1019 cm-3 and simultaneously realizing high carrier mobility of＞120 cm2·V-1·s-1,an impressive room-temperature power factor of 24.13 μW·cm-1·K-2 is achieved in a Bi0.4Sb1.6Te3 thin *** flexible Bi0.4Sb1.6Te3 thin film also demonstrates excellent bending resistance and stability(ΔR/R0＜5％,ΔS/S0＜5％,andΔS2σ/S02σ0＜10％)after 1000 bending cycles at a mini-mum bending radius of 6 mm.A flexible thin-film ther-moelectric device assembled with p-type Bi0.4Sb1.6Te3 legs achieves a remarkable power output of～82.15 nW and a power density of～547.68 μW·cm-2 under a temperature difference of 20 K.

关键词： Thermoelectric performance Flexible thin film Device BiSbTe

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Unexpected divergence in magnetoreceptor MagR from robin and pigeon linked to two sequence variations

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Zoological Research 2024年第1期45卷 69-78页

作者： Shun Wang Peng Zhang Fan Fei Tianyang Tong Xiujuan Zhou Yajie Zhou Jing Zhang Mengke Wei Yanqi Zhang Lei Zhang Yulong Huang Lin Zhang Xin Zhang Tiantian Cai Can Xie Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui 230039China High Magnetic Field Laboratory Hefei Institutes of Physical ScienceChinese Academy of SciencesScience IslandHefeiAnhui 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefeiAnhui 230036China Department of Anatomy Anhui Medical UniversityHefeiAnhui 230032China Department of Mechanical and Aerospace Engineering University at BuffaloState University of New YorkBuffaloNY 14260 USA International Magnetobiology Frontier Research Center Science IslandHefeiAnhui 230031China

Birds exhibit extraordinary mobility and remarkable navigational skills,obtaining guidance cues from the Earth’s magnetic field for orientation and long-distance *** species also show tremendous diversity in navigation strategies,with considerable differences even within the same taxa and among individuals from the same *** highly conserved iron and iron-sulfur cluster binding magnetoreceptor(MagR)protein is suggested to enable animals,including birds,to detect the geomagnetic field and navigate ***,MagR is also implicated in other functions,such as electron transfer and biogenesis of iron-sulfur clusters,raising the question of whether variability exists in its biochemical and biophysical features among species,particularly *** the current study,we conducted a comparative analysis of MagR from two different bird species,including the migratory European robin(Erithacus rubecula)and the homing pigeon(Columba livia).Sequence alignment revealed an extremely high degree of similarity between the MagRs of these species,with only three sequence ***,two of these variations underpinned significant differences in metal binding capacity,oligomeric state,and magnetic *** findings offer compelling evidence for the marked differences in MagR between the two avian species,potentially explaining how a highly conserved protein can mediate such diverse functions.

关键词： Homing and migration Animal navigation Magnetoreceptor(MagR) Diverse navigation pattern Conserved protein

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An Artificial Neuromuscular Synapse Based on a Ferroelectric Pb(Zr1-xTix)O3/SiC Floating Gate Transistor 17

An Artificial Neuromuscular Synapse Based on a Ferroelectric...

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17th IEEE International Conference on Solid-State and Integrated Circuit technology, ICSICT 2024

作者： Liu, Yu Lin, Lin Wang, Xiang Zhong, Chengyan Guo, Junxiong Huang, Wen Guo, Yufeng College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology Nanjing210023 China School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of China State Key Laboratory of Electronic Thin Films and Integrated Devices Chengdu610054 China Institute of Advanced Study School of Electronic Information and Electrical Engineering Chengdu University Chengdu610106 China

ISBN: (纸本)9798350361834

Neuromuscular junctions (NMJs) are specialized synapses that enable the efficient transduction of neural signals into muscle contractions in biological systems. Desirable artificial NMJs aim to replicate biological synaptic plasticity and high-power actuation for advanced robotics and prosthetics, but face challenges in achieving sufficient flexibility, strength, and self-contained operation. Here, we report a novel artificial NMJ based on a silicon carbide (SiC) ferroelectric field-effect transistor. By integrating a ferroelectric floating gate dielectric with a wide-bandgap SiC transistor, we achieve a wide range of non-volatile conductance modulation, enabling the emulation of long-term synaptic plasticities. We demonstrate the PZT-SiC transistor's higher threshold voltage and lower operating currents compared to traditional SiC transistors, resulting in reduced power consumption. The device exhibits excellent synaptic plasticity, with the ability to modulate synaptic weights through successive test cycles and upon pulsatile stimulation. We showcase the potential of the PZT-SiC synaptic transistor through its application in convolutional image processing, where it successfully extracts horizontal and vertical features using Sobel kernels. Our work presents a promising hardware platform for efficient and scalable artificial NMJs, paving the way for advanced biohybrid systems and neuromorphic robots. © 2024 IEEE.

关键词： Gate dielectrics

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Tunable Silicon Ring Resonator with Wavelength-scale Radius at 2-μm Waveband

Tunable Silicon Ring Resonator with Wavelength-scale Radius ...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Wu, You Wang, Xi Zhang, Zimeng Du, Jiangbing Song, Qinghai Xu, Ke Department of Electronic and Information Engineering Harbin Institute of Technology Shenzhen518055 China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China Department of Science Harbin Institute of Technology Shenzhen518055 China

A tunable silicon photonic microring resonator with radius of 2 μm is demonstrated at 2-μm waveband. Ultra-large free spectral range of 75.312 nm and extinction ratio of 23.93 dB are achieved. © Optica Publishi... 详细信息

ISBN: (纸本)9781957171258

关键词： Silicon photonics

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Multi-Attention Fusion and Fine-Grained Alignment for Bidirectional Image-Sentence Retrieval in Remote Sensing

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IEEE/CAA Journal of Automatica Sinica 2022年第8期9卷 1532-1535页

作者： Qimin Cheng Yuzhuo Zhou Haiyan Huang Zhongyuan Wang School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China School of Computer Science Wuhan UniversityWuhan 430079China

Dear editor,Cross-modal retrieval in remote sensing(RS) data has inspired increasing enthusiasm due to its merit in flexible input and efficient query. In this letter, we address to establish semantic relationship bet... 详细信息

关键词： editor Remote Image

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Nonvolatile chirality switching in terahertz chalcogenide metasurfaces

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Microsystems & Nanoengineering 2022年第5期8卷 197-205页

作者： Jiaxin Bao Xieyu Chen Kuan Liu Yu Zhan Haiyang Li Shoujun Zhang Yihan Xu Zhen Tian Tun Cao School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024P.R.China Center for Terahertz waves and College of Precision Instrument and Optoelectronics Engineering Tianjin Universityand the Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin 300072P.R.China

Actively controlling the polarization states of terahertz(THz)waves is essential for polarization-sensitive spectroscopy,which has various applications in anisotropy imaging,noncontact Hall measurement,and vibrational circular *** the THz regime,the lack of a polarization modulator hinders the development of this *** theoretically and experimentally demonstrate that conjugated bilayer chiral metamaterials(CMMs)integrated with Ge_(2)Sb_(2)Te_(5)(GST225)active components can achieve nonvolatile and continuously tunable optical activity in the THz region.A THz time-domain spectroscopic system was used to characterize the device,showing a tunable ellipticity(from‒36°to 0°)and rotation of the plane polarization(from 32°to 0°)at approximately 0.73 THz by varying the GST225 state from amorphous(AM)to crystalline(CR).Moreover,a continuously tunable chiroptical response was experimentally observed by partially crystallizing the GST225,which can create intermediate states,having regions of both AM and CR *** that the GST225 has an advantage of nonvolatility over the other active elements and does not require any energy to retain its structural *** work allows the development of THz metadevices capable of actively manipulating the polarization of THz waves and may find applications for dynamically tunable THz circular polarizers and polarization modulators for THz emissions.

关键词： polarization tunable modulator

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Fast Microwave Near-Field Phase Retrieval Based on Improved Diffraction Neural Networks 7

Fast Microwave Near-Field Phase Retrieval Based on Improved ...

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7th IEEE International Conference on Electronic information and Communication technology, ICEICT 2024

作者： Li, Ying Deng, Li Chen, Lijie Beijing University of Posts and Telecommunications School of Information and Communication Engineering Beijing100871 China China Ship Development and Design Center Science and Technology on Electromagnetic Compatibility Laboratory Wuhan430064 China

ISBN: (纸本)9798350384437

This paper presents a fast microwave near-field phase retrieval method based on an Improved Diffraction Neural Network (IDNN). The method first modifies the Rayleigh-Sommerfeld (RS) formula using the angular spectrum method to adapt it for the Phase Retrieval (PR) equation. By enhancing the output layer of the DNN to simultaneously provide amplitude and phase information and incorporating a backward phase iteration step, the accuracy of phase retrieval is significantly improved. The optimization process leverages a custom-designed loss function and the Adam optimizer for gradient descent, enabling the retrieval of phase information using only amplitude data from two plane measurements. Simulation results validate the effectiveness of this approach and demonstrate its advantages in speed compared to classical algorithms such as the Gerchberg-Saxton (GS) algorithm and the Truncated Amplitude Flow (TAF) algorithm. © 2024 IEEE.

关键词： Microwave measurement

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Enrichment of anchoring sites by introducing supramolecular halogen bonds for the efficient perovskite nanocrystal LEDs

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Light(science & Applications) 2023年第10期12卷 2122-2130页

作者： Po Lu Ting Li Min Lu Cheng Ruan Siqi Sun Zhennan Wu Yuan Zhong Fujun Zhang Yanbo Gao Yaowei Huang Yang Wang Junhua Hu Fengping Yan Yu Zhang State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering Jilin UniversityChangchunChina School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijingChina Changchun Cedar Electronics Technology Co. Ltd.ChangchunChina Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina Key Laboratory of Materials Physics of Ministry of Education Department of Physics and Engineering Zhengzhou UniversityZhengzhouChina

Considering the multi-functionalization of ligands,it is crucial for ligand molecular design to reveal the landscape of anchoring ***,a typical triphenylphosphine(TPP)ligand was employed to explore its effect on the surface of CsPbI_(3)perovskite nanocrystals(PNCs).Except for the conventionally considered P-Pb coordination,an P-I supramolecular halogen bonding was also found on the NC *** coexistence of the above two types of bonding significantly increased the formation energy of iodine vacancy defects and improved the photoluminescence quantum yield of PNCs up to 93%.Meanwhile,the direct interaction of P and I enhanced the stability of the Pb-I octahedra and dramatically inhibited the migration of I ***,the introduction of additional benzene rings(2-(Diphenylphosphino)-biphenyl(DPB))increased the delocalized properties of the PNC surface and significantly improved the charge transport of the *** a result,the DPB passivated CsPbI_(3)NCs based top-emitting LEDs exhibite a peak external quantum efficiency(EQE)of 22.8%,a maximum luminance of 15,204 cd m^(−2),and an extremely low-efficiency roll-off of 2.6%at the current density of 500 mA cm^(−2).

关键词： halo bonding quantum

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