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arXiv 2024年

作者： Wang, Zihao Wang, Yifei Shi, Baoqi Sun, Wei Yang, Changxi Liu, Junqiu Bao, Chengying State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Tsinghua University Beijing100084 China International Quantum Academy Shenzhen518048 China Department of Optics and Optical Engineering University of Science and Technology of China Anhui Hefei230026 China Hefei National Laboratory University of Science and Technology of China Hefei230088 China

Absolute distance measurement with low return power, fast measurement speed, high precision, and immunity to intensity fluctuations is highly demanded in nanotechnology. However, achieving all these objectives simultaneously remains a significant challenge for miniaturized systems. Here, we demonstrate dual-comb ranging (DCR) that encompasses all these capabilities by using counterpropagating (CP) solitons generated in an integrated Si3N4 microresonator. We derive equations linking the DCR precision with comb line powers, revealing the advantage of microcomb’s large line spacing in precise ranging. Leveraging the advantage, our system reaches 1-nm-precision and measures nm-scale vibration at frequencies up to 0.9 MHz. We also show that precise DCR is possible even in the presence of strong intensity noise and loss, using a mean received photon number as low as 5.5×10−4 per pulse. Our work establishes an optimization principle for dual-comb systems and bridges high performance ranging with foundry-manufactured photonic chips. © 2024, CC BY.

关键词： Solitons

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UKF-Based Multi-sensor Data Processing Algorithm for SLAM

UKF-Based Multi-sensor Data Processing Algorithm for SLAM

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IEEE International Conference on Control Science and Systems engineering (CCSSE)

作者： Kun Xu Boheng Zhang Jiangang Li Guizhong Wang Mingjian Sun School of Information Science and Engineering Harbin Institute of Technology Weihai Weihai China Department of Control Science and Engineering Harbin Institute of Technology Harbin China Woan Technology (Shenzhen) Co. Ltd. Shenzhen China Hebei Key Laboratory of Grid Advanced Measurement and Monitor Jinyanhagong Industrial Technology Research Institute Zhangjiakou China School of Information Science and Engineering Harbin Institute of Technology Harbin China

Simultaneous localization and mapping (SLAM) algorithm is widely used in unmanned and robotic applications. SLAM usually uses sensor data, which are from the LiDAR, the inertial measurement unit (IMU) and the wheeled odometry, to build maps of the surrounding environment. However, the motion distortion of LiDAR data and the error accumulation of wheeled odometry can affect the accuracy of the front-end odometry of the SLAM algorithm, which can lead to serious errors in the maps created. Therefore, in order to solve the problem of poor map construction results of SLAM algorithm due to various types of sensor errors. we propose the traceless Kalman filtering based (UKF-based) multi-sensor data processing algorithm. Firstly, the proposed algorithm uses the UKF to fuse IMU and wheeled odometry data to reduce the cumulative error of wheeled odometry. And then the algorithm uses IMU and corrected wheeled odometry data and combines with the motion states of the robot to solve the motion distortion problem of LiDAR data. Finally, we verified the effectiveness of the proposed algorithm for wheeled odometry data correction in Gazebo simulation environment and real environment experiments, and compared the mapping effectiveness of SLAM by using the original data and the data processed by our algorithm. The experimental results show that the map construction effect of SLAM algorithm is significantly improved when using the sensor data processed by the algorithm. Experimental validation on the robot shows that the proposed algorithm has universal applicability and good compatibility.

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Context-aware Emotion Recognition Based on Vision-Language Pre-trained Model

Context-aware Emotion Recognition Based on Vision-Language P...

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International Conference on Advanced Robotics and Mechatronics (ICARM)

作者： XingLin Li Xinde Li Chuanfei Hu Huaping Liu School of Automation Southeast University Nanjing China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Nanjing China Nanjing Center for Applied Mathematics Nanjing China Southeast University Shenzhen Research Institute Shenzhen China Department of Computer Science and Technology Tsinghua University Beijing China

ISBN: (数字)9798350385724

ISBN: (纸本)9798350385731

Given the difficulty of recognizing ambiguous emotions in facial expression recognition tasks, we propose a visual-language model named CAER-CLIP to address this challenge. The proposed CAER-CLIP standed for Context-Aware Emotion Recognition (CAER), and were incorporated structure of the Contrastive Language–Image Pre-training (CLIP) model as promising alternative to classifier. There are two parts in CAER-CLIP model. In the visual part, facial expressions and contextual information of the image are simultaneously extracted to obtain the final feature embeddings, which are then used as a learnable “class” token for text-image pairing with desired module. In the textual part, we use text labels for emotion recognition classes as input. The outputs were merged to participate the comparative study to generated parameters of the model. The experiments demonstrate the effectiveness of the proposed method and show that our CAER-CLIP outperforms the state-of-the-art results on the CAER benchmark. The ablation experiment verified the effectiveness of both the classifier-based and text-based (ours without classifier) models, demonstrating that our method with the CAER-CLIP structure performed better, and the incorporation of a text encoder in the deep network model architecture effectively enhancing recognition accuracy.

关键词： Training Emotion recognition Visualization Accuracy Text recognition Face recognition Benchmark testing Feature extraction Data mining Context modeling

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A fully integrated electronic fabric-enabled multimodal flexible sensors for real-time wireless pressure-humidity-temperature monitoring

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International Journal of Extreme Manufacturing 2024年第6期6卷 548-560页

作者： Yunlong Zhao Yangbo Yuan Haiyan Zhang Zijian Chen Haitao Zhao Guirong Wu Weihao Zheng Chenyang Xue Zongyou Yin Libo Gao Pen-Tung Sah Institute of Micro-Nano Science and Technology and Discipline of Intelligent Instrument and EquipmentXiamen UniversityXiamen 361102People's Republic of China Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802United States of America Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsChinese Academy of Space TechnologyLanzhou 730000People's Republic of China Center for Intelligent and Biomimetic Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople's Republic of China School of Mechano-Electronic Engineering Xidian UniversityXian 710071People's Republic of China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051People's Republic of China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005People's Republic of China Research School of Chemistry Australian National UniversityCanberraACT 2601Australia

Real-time physiological information monitoring can predict and prevent disease, or improve treatment by early diagnosis. A comprehensive and continuous monitoring of human health requires highly integrated wearable and comfortable sensing devices. To address this need, we propose a low-cost electronic fabric-enabled multifunctional flexible sensing integration platform that includes a flexible pressure sensor for monitoring postural pressure, a humidity sensor for monitoring the humidity of the skin surface, and a flexible temperature sensor for visualizing the ambient temperature around the human body. Thanks to the unique rough surface texture, hierarchical structure, and robust electromechanical features of the MXene-modified nonwoven fabrics, the flexible pressure sensor can achieve a monitoring sensitivity of 1529.1 kPa~(-1) and a pressure range of 150 kPa, which meets the demand for human pressure detection. In addition, the unique porous structure of the fabric and the stacked multilayer structure of MXene enable the humidity sensor to exhibit extremely high monitoring sensitivity, even through clothing, and still be able to detect the humidity on the skin *** sensors based on screen-printed thermochromic liquid crystals enable visual monitoring in the range of 0℃–65℃. Through further integration with flexible printed circuit board circuits, we demonstrate a proof-of-concept device that enables real-time monitoring of human physiological information such as physical pressure, humidity, and ambient temperature environment, suggesting that the device provides an excellent platform for the development of commercially viable wearable healthcare monitors.

关键词： wearable sensor non-invasive physiological monitoring MXene(Ti_3C_2T_x) thermochromic liquid crystals(TLCs) integrated sensor patch

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Au&WO3 heterojunctions against multidrug-resistant bacteria

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Nano Today 2025年 64卷

作者： Zhang, Pai Cha, Ruitao Si, Yanxue Luo, Huize Lin, Qianqian Qin, Jiamin Tang, Hao Zhou, Fengshan Wang, Xiaohui Jiang, Peng Jiang, Xingyu No. 29 Xueyuan Road Haidian District Beijing100083 China Laboratory of Theoretical and Computational Nanoscience CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology No. 11 Zhongguancun Beiyitiao Haidian District Beijing100190 China Academy of Military Medical Sciences Beijing100850 China CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing100190 China College of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing100049 China Guangdong Provincial Key Laboratory of Advanced Biomaterials Shenzhen Key Laboratory of Smart Healthcare Engineering Department of Biomedical Engineering Southern University of Science and Technology No. 1088 Xueyuan Road Nanshan District Shenzhen Guangdong518055 China

Wound infections caused by multidrug-resistant (MDR) Gram-negative bacteria remain a significant medical challenge. Existing treatments, including antibiotics, antimicrobial peptides, and nanomaterials, are limited by drug resistance and toxicity. It is urgent to develop an effective alternative agent for treatment of infected wound. Here, we synthesized Au&WO3 heterojunctions via a hydrothermal method and NaBH4 reduction to address MDR bacterial infections. We characterized the structure of Au&WO3 heterojunctions by TEM, EDS, and zeta potential. Mechanistically, The enhanced bacterial activity could arise from synergistic effects of membrane disruption by Au nanoparticles and replacement of the molybdenum factor by W6 + ions. The Au1&WO3 heterojunction had a minimum inhibitory concentration (MIC) of 12 µg/mL against MDR E. coli, outperforming individual Au nanoparticles and WO3 nanorods. In vitro, Au1&WO3 induced M2 macrophage polarization, demonstrating strong anti-inflammatory activity. The PG-Au1&WO3 membranes exerted excellent antibacterial and anti-inflammation properties with good biocompatibility, promoting wound healing in MDR E. coli-infected wound models. The Au&WO3 heterojunctions highlight their potential as a promising wound dressing for MDR infection treatment. © 2025 Elsevier Ltd

关键词： Nanorods

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Volatile Organic Compound Emissions from Polluted and Natural Soils: Influences of Environmental Factors

ACS ES&T Air

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ACS ES&T Air 2025年第3期2卷 386-395页

作者： Yaxi Liu Jianhuai Ye Yan Yang Chen Yu Fan Yang Bi Chen Jianguo Zhou Gan Yang Xinning Wang Xiaohui Lu Jianmin Chen Zimeng Wang Lin Wang Xiaofei Wang Xin Yang Department of Resource and Environment Moutai Institute Renhuai 564507 China；Chishui River Middle Basin Watershed ecosystem Observation and Research Station of Guizhou Province Renhuai 564501 China；Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Fudan University Shanghai 200438 China；Academy of Science and Technology Kweichow Moutai Group Renhuai 564501 China Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 China；Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area Shenzhen 518055 China Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Department of Resource and Environment Moutai Institute Renhuai 564507 China；Chishui River Middle Basin Watershed ecosystem Observation and Research Station of Guizhou Province Renhuai 564501 China Chishui River Middle Basin Watershed ecosystem Observation and Research Station of Guizhou Province Renhuai 564501 China；Academy of Science and Technology Kweichow Moutai Group Renhuai 564501 China Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Fudan University Shanghai 200438 China

Volatile organic compounds (VOCs) impact urban air quality and human health. Soil represents a potentially important source of VOCs. However, the VOC emission characteristics of soils from different urban and natural environments remain unclear. In this study, the composition and flux of VOCs emitted from various soil types were examined. Results reveal significantly elevated VOC emissions from polluted soils, with levels 2 orders of magnitude higher than those from their natural counterparts. Influences of light, soil water content, and temperature on VOC emissions were explored. Light exposure notably enhanced the emissions of certain VOCs, such as acetonitrile, from highly polluted industrial soils. Simultaneously, reductions in VOCs such as terpenes were observed, possibly driven by photochemical degradation processes. By comparison, soils from less polluted environments exhibited minimal changes in VOC emissions under light exposure, emphasizing the distinct behaviors of different soil types. Soil water content was inversely correlated with VOC emission rates, likely due to reduced soil porosity and permeability at higher moisture levels, whereas temperature exhibited intricate effects on soil emissions that varied with VOC species. Factors such as soil VOC storage, VOC “affinity” to soil, and microbial activities may play roles and warrant future investigation. Results from this study highlight soil emissions as non-negligible contributors to ambient VOC levels and underscore the crucial impacts of environmental factors in modulating these emissions.

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Rapid Stokes imaging applied to monitor oscillations during optical tissue clearing

Rapid Stokes imaging applied to monitor oscillations during ...

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Polarized Light and Optical Angular Momentum for Biomedical Diagnostics 2021

作者： Song, Jiawei Zeng, Nan Ma, Hui Guangdong Research Center of Polarization Imaging and Measurement Engineering Technology Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Graduate School at Shenzhen Tsinghua University Shenzhen518055 China Department of Physics Tsinghua University Beijing100084 China Center for Precision Medicine and Healthcare Tsinghua-Berkeley Shenzhen Institute Shenzhen518071 China

ISBN: (数字)9781510641280

ISBN: (纸本)9781510641273

Tissue optical clearing techniques have become more and more prominent in biomedical applications, since they can reduce scattering and improve the imaging depth, resolution and contrast. Polarization is sensitive to the microstructure of tissues, when apply the rapid Stokes imaging method to monitor the process of optical tissue clearing, we observe that the polarization parameters oscillate periodically during clearing. A series of experiments have been designed to verify the truth of oscillations, we first eliminate the influence of system noise by measuring air and other polarization optics, the system error is less than 1% and is stable, then we analyze the impacts from optical clearing agents, we take quartz plate, the quartz plate with saturated sucrose solution, the fact is that there are slight fluctuations in polarization parameters but no oscillations. However, when we test the porcine skin which immersed in optical clearing agents, there are significant oscillations which show periodicity in polarization parameter, the oscillation cycle is about 40s and the oscillation amplitudes become smaller with the increase of immersion time. Finally, we imaging the samples which have completed optical clearing and no oscillation is found. By these series experiments, we confirm the truth of oscillations of the polarization parameters during clearing, and we believe these are connected with the mechanisms of the clearing which need further study. © 2021 SPIE

关键词： Tissue

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Determination of ionic polarizability by nonsequential double ionization

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Physical Review A 2023年第2期108卷 023111-023111页

作者： MingZheng Wei HuiPeng Kang YanLan Wang Wei Quan Jing Chen ChuanXi Duan XiaoJun Liu College of Physical Science and Technology Central China Normal University Wuhan 430079 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences Department of Modern Physics University of Science and Technology of China Hefei China Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology and College of Engineering Physics Shenzhen Technology University Shenzhen 518118 China

We report on a theoretical study of nonsequential double ionization (NSDI) of magnesium atoms by circularly polarized intense laser pulses. We introduce a concise model considering the laser-induced dynamic core polarization, which is an often overlooked effect in understanding strong-field double ionization. By tracing back the electron trajectories, we demonstrate how the ionic response to the instantaneous laser field enhances the NSDI probability, which plays a crucial role in circular polarization. Furthermore, we propose a method to extract the ionic polarizability from the ratio of double to single ionization. This scheme can be applied to other polar targets and serves as a potential way to probe nonequilibrium states of strongly driven systems on the subfemtosecond timescale.

关键词： Atomic & molecular processes in external fields Multiphoton or tunneling ionization & excitation Ultrafast phenomena

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Integrated and DC-powered superconducting microcomb

arXiv

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arXiv 2024年

作者： Wang, Chen-Guang Xu, Wuyue Li, Chong Shi, Lili Jiang, Junliang Guo, Tingting Yue, Wen-Cheng Li, Tianyu Zhang, Ping Lyu, Yang-Yang Pan, Jiazheng Deng, Xiuhao Dong, Ying Tu, Xuecou Dong, Sining Cao, Chunhai Zhang, Labao Jia, Xiaoqing Sun, Guozhu Kang, Lin Chen, Jian Wang, Yong-Lei Wang, Huabing Wu, Peiheng Research Institute of Superconductor Electronics School of Electronic Science and Engineering Nanjing University Nanjing China Purple Mountain Laboratories Nanjing China National Key Laboratory of Spintronics Nanjing University Suzhou China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen China Hefei National Laboratory Hefei China College of Metrology Measurement and Instrument China Jiliang University Hangzhou China

Frequency combs, specialized laser sources emitting multiple equidistant frequency lines, have revolutionized science and technology with unprecedented precision and versatility. Recently, integrated frequency combs are emerging as scalable solutions for on-chip photonics. Here, we demonstrate a fully integrated superconducting microcomb that is easy to manufacture, simple to operate, and consumes ultra-low power. Our turnkey apparatus comprises a basic nonlinear superconducting device, a Josephson junction, directly coupled to a superconducting microstrip resonator. We showcase coherent comb generation through self-started mode-locking. Therefore, comb emission is initiated solely by activating a DC bias source, with power consumption as low as tens of picowatts. The resulting comb spectrum resides in the microwave domain and spans multiple octaves. The linewidths of all comb lines can be narrowed down to 1 Hz through a unique coherent injection-locking technique. Our work represents a critical step towards fully integrated microwave photonics and offers the potential for integrated quantum processors. © 2024, CC BY-NC-ND.

关键词： Microwave photonics

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Three factors make bulk high-entropy alloys as effective electrocatalysts for oxygen evolution

材料展望（英文）

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材料展望（英文） 2023年第4期 110-120页

作者： Tao Zhang Hui-Feng Zhao Ke-Yan Wang Zhen-Jie Chen Li Li Jing Peng Xu Peng Yong-Jiang Huang Hai-Bin Yu Wuhan National High Magnetic Field Center & School of Physics Huazhong University of Science and TechnologyWuhan 430074People's Republic of China School of Materials Science and Engineering Center of Analysis Measurement and ComputingHarbin Institute of TechnologyHarbin 150001People's Republic of China Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen 518055People's Republic of China Shenzhen Key Laboratory of Energy Materials for Carbon Neutrality Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People's Republic of China College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062People's Republic of China

Even in their bulk forms,complex alloys like high-entropy alloys(HEAs)exhibit favorable activity and stability as electrocatalysts for the oxygen evolution reaction(OER).However,the underlying reasons are not yet fully *** a family of Mo-doped CrFeCoNi-based HEAs,we have identified three crucial factors that govern their performance:(ⅰ)homogeneous solid solution phase of HEAs helps to maintain high-valence states of metals;(ⅱ)surface reconstruction results in a hybrid material comprising amorphous domains and percolated crystalline structures;(ⅲ)diversity of active intermediate species(M-O,M-OOH,and,notably,the abundance of superoxide μ-OO),which display stronger adsorption capacity on the reconstructed *** results are revealing due to their resemblance to findings in other families of electrocatalysts for OER,as well as their unique features specific to *** line with these factors,a CrFeCoNiMo0.2 bulk integrated electrode displays a low overpotential of 215 mV,rapid kinetics,and long-term stability of over 90 *** HEAs hold great potential for industrial applications.

关键词： high-entropy alloy solid solution electrocatalysis DFT calculation oxygen evolution reaction

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