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Ultra‑High Sensitivity Anisotropic Piezoelectric Sensors for Structural Health Monitoring and Robotic Perception

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Nano-Micro Letters 2025年第2期17卷 432-446页

作者： Hao Yin Yanting li Zhiying Tian Qichao li Chenhui Jiang Enfu liang Yiping Guo State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Beijing Vacuum Electronics Research Institute Beijing 100015People’s Republic of China Fundamental Science On Vibration Shock and Noise LaboratoryState Key Laboratory of Mechanical System and VibrationSchool of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Monitoring minuscule mechanical signals,both in magnitude and direction,is imperative in many application scenarios,e.g.,structural health monitoring and robotic sensing ***,the piezoelectric sensor struggles to satisfy the requirements for directional recognition due to the limited piezoelectric coefficient matrix,and achieving sensitivity for detecting micrometer-scale deformations is also ***,w. develop a vector sensor composed of lead zirconate titanate-electronic grade glass fiber composite filaments w.th oriented arrangement,capable of detecting minute anisotropic *** as-prepared vector sensor can identify the deformation directions even w.en subjected to an unprecedented nominal strain of 0.06%,thereby enabling its utility in accurately discerning the 5μm-height w.inkles in thin films and in monitoring human pulse *** ultra-high sensitivity is attributed to the formation of porous ferroelectret and the efficient load transfer efficiency of continuous lead zirconate titanate ***,w.en integrated w.th machine learning techniques,the sensor’s capability to recognize multi-signals enables it to differentiate betw.en 10 types of fine textures w.th 100%*** structural design in piezoelectric devices enables a more comprehensive perception of mechanical stimuli,offering a novel perspective for enhancing recognition accuracy.

关键词： Flexible piezoelectric filaments Anisotropic Ultra-high sensitivity Structural health detection Texture recognition

Optimization Strategies of Na_(3)V_(2)(PO_(4))_(3) Cathode Materials for Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 204-251页

作者： Jiaw.n Hu Xinw.i li Qianqian liang li Xu Changsheng Ding Yu liu Yanfeng Gao School of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China

Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,w.ich strictly confine its further application in ***,it is of significance to boost the sodium storage performance of NVP cathode *** to now.many methods have been developed to optimize the electrochemical performance of NVP cathode *** this review.the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are w.ll summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology *** foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,w.ich include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so ***,the challenges and prospects of high-performance NVP cathode material are also put *** is believed that this review.can provide a useful reference for designing and developing high-performance NVP cathode material tow.rd the large-scale application in SIBs.

关键词： Sodium-ion batteries Na_(3)V_(2)(PO_(4))_(3) Cathode materials Electrochemical performance Optimization strategies

Sex-dependent alterations in extracellular vesicles linking chronic spinal cord injury to brain neuroinflammation and neurodegeneration

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Neural Regeneration Research 2025年第2期20卷 483-484页

作者： Yun li Junfang w. Department of Anesthesiology&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumatic spinal cord injury(SCI)is a devastating exogenous injury w.th long-lasting consequences and a leading cause of death and disability *** in assistive technology,rehabilitative interventions,and the ability to identify and intervene in secondary conditions have significantly increased the long-term survival rate of SCI patients,w.th some people even living w.ll into their seventh or eighth *** survival changes have led neurotrauma researchers to examine how.SCI interacts w.th brain *** health and epidemiological data show.d that patients w.th long-term SCI can have a low.r life expectancy and quality of life,along w.th a higher risk of comorbidities and complications.

关键词： alterations inflammation injury

Joint Feature Encoding and Task Alignment Mechanism for Emotion-Cause Pair Extraction

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Computers, Materials & Continua 2025年第1期82卷 1069-1086页

作者： Shi li Didi Sun College of Computer and Control Engineering Northeast Forestry UniversityHarbin150040China

w.th the rapid expansion of social media,analyzing emotions and their causes in texts has gained significant ***-cause pair extraction enables the identification of causal relationships betw.en emotions and their triggers w.thin a text,facilitating a deeper understanding of expressed sentiments and their underlying *** comprehension is crucial for making informed strategic decisions in various business and societal ***,recent research approaches employing multi-task learning framew.rks for modeling often face challenges such as the inability to simultaneouslymodel extracted features and their interactions,or inconsistencies in label prediction betw.en emotion-cause pair extraction and independent assistant tasks like emotion and cause *** address these issues,this study proposes an emotion-cause pair extraction methodology that incorporates joint feature encoding and task alignment *** model consists of tw. primary components:First,joint feature encoding simultaneously generates features for emotion-cause pairs and clauses,enhancing feature interactions betw.en emotion clauses,cause clauses,and emotion-cause ***,the task alignment technique is applied to reduce the labeling distance betw.en emotion-cause pair extraction and the tw. assistant tasks,capturing deep semantic information interactions among *** proposed method is evaluated on a Chinese benchmark corpus using 10-fold cross-validation,assessing key performance metrics such as precision,recall,and F1 *** results demonstrate that the model achieves an F1 score of 76.05%,surpassing the state-of-the-art by 1.03%.The proposed model exhibits significant improvements in emotion-cause pair extraction(ECPE)and cause extraction(CE)compared to existing methods,validating its *** research introduces a novel approach based on joint feature encoding and task alignment mechanisms,contributing to advancements in emotion-c

关键词： Emotion-cause pair extraction interactive information enhancement joint feature encoding label consistency task alignment mechanisms

Impact of Bubbles on Mechanical Performances in a Borosilicate Glass

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Journal of w.han University of Technology(Materials Science) 2025年第1期40卷 25-29页

作者： li Chengxing li Dongfeng MA Shilong QIAO Ang ZHENG Qingshuang China Helicopter Research and Development Institute Jingdezhen 333001China State Key Laboratory of Silicate Materials for Ar-chitectures Wuhan University of TechnologyWuhan 430070China

To analyze the impact of bubbles on the mechanical behavior of glasses,by controlling the refining time,w. prepared three borosilicate glasses w.th the same composition and different *** the analysis softw.re integrated w.thin the optical microscope,the diameter and number of the bubbles on the surface of three borosilicate glasses w.re *** the hardness and crack initiation resistance(CR),w. built the relationship betw.en the porosity and the mechanical performance of these borosilicate glasses.

关键词： bubbles oxide glass hardness creak initiation resistance

Targets capture by distributed active sw.rms via bio-inspired reinforcement learning

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu Yue li Jun Sun Shuyuan Du Xinpeng Di Yuguang Yang Bo li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New.Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural sw.rms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new.strategies for controlling collective dynamics of synthetic sw.rms to accomplish specific functions. Here, w. present a bioinspired computational framew.rk that steers distributed active sw.rms to collectively capture and merge targets via reinforcement learning. w. exploit collective milling structures of natural herds to cage the targets, and adopt a sw.tching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through w.ich the active sw.rms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical sw.rm size, beyond w.ich the excessive competition betw.en agents w.uld generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This w.rk provides physical insights into distributed active sw.rms and could offer a multilevel, decentralized strategy tow.rd controlling sw.rm robotics in w.de applications such as bio-medical devices, machine immunity, and target clearance.

关键词： sw.rm intelligence robotics multi-tasks artificial intelligence bionics

Quantum public-key crypto via EPR pairs

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 58-63页

作者： Xiang-Qun Fu Hong-w.i li Jian-Hong Shi Tan li w.n-Su Bao Henan Key Laboratory of Quantum Information and Cryptography Information Engineering University Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

w.th the development of quantum computing technology, quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key cryptography. This paper designs a quantum trapdoor one-w.y function via EPR pairs and quantum measurements. Based on this, a new.quantum public-key cryptosystem is presented, w.ich offers forw.rd security,and can resist the chosen-plaintext attack and chosen-ciphertext attack. Compared w.th the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new.quantum public-key cryptosystem under a necessary condition, w.ich is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-w.y function EPR pairs

Small extracellular vesicles derived from cerebral endothelial cells w.th elevated microRNA 27a promote ischemic stroke recovery

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Neural Regeneration Research 2025年第1期20卷 224-233页

作者： Yi Zhang Zhongw. liu Michael Chopp Michael Millman Yanfeng li Pasquale Cepparulo Amy Kemper Chao li li Zhang Zheng Gang Zhang Department of Neurology Henry Ford HospitalDetroitMIUSA Department of Physics Oakland UniversityRochesterMIUSA Department of Pathology Henry Ford HospitalDetroitMIUSA Division of Pharmacology Department of NeuroscienceReproductive and Dentistry SciencesSchool of MedicineUniversity of Naples“Federico Ⅱ”NaplesItaly

Axonal remodeling is a critical aspect of ischemic brain repair processes and contributes to spontaneous functional *** previous in vitro study demonstrated that exosomes/small extracellular vesicles(sEVs)isolated from cerebral endothelial cells(CEC-sEVs)of ischemic brain promote axonal grow.h of embryonic cortical neurons and that microRNA 27a(miR-27a)is an elevated miRNA in ischemic *** the present study,w. investigated w.ether normal CEC-sEVs engineered to enrich their levels of miR-27a(27a-sEVs)further enhance axonal grow.h and improve neurological outcomes after ischemic stroke w.en compared w.th treatment w.th non-engineered CEC-sEVs.27a-sEVs w.re isolated from the conditioned medium of healthy mouse CECs transfected w.th a lentiviral miR-27a expression *** EVs isolated from CECs transfected w.th a scramble vector(Scra-sEVs)w.re used as a *** male mice w.re subjected to permanent middle cerebral artery occlusion and then w.re randomly treated w.th 27a-sEVs or *** array of behavior assays w.s used to measure neurological *** w.th treatment of ischemic stroke w.th Scra-sEVs,treatment w.th 27a-sEVs significantly augmented axons and spines in the peri-infarct zone and in the corticospinal tract of the spinal grey matter of the denervated side,and significantly improved neurological *** vitro studies demonstrated that CEC-sEVs carrying reduced miR-27a abolished 27a-sEV-augmented axonal *** analysis revealed that 27a-sEVs systemically administered preferentially localized to the pre-synaptic active zone,w.ile quantitative reverse transcription-polymerase chain reaction and w.stern Blot analysis show.d elevated miR-27a,and reduced axonal inhibitory proteins Semaphorin 6A and Ras Homolog Family Member A in the peri-infarct *** of the Clathrin-dependent endocytosis pathw.y substantially reduced neuronal internalization of *** data provide evidence that 27a-sEVs have

关键词： axonal remodeling cerebral endothelial cells exosomes miR-27a mitochondria Semaphorin 6A small extracellular vesicles stroke

A Rapid Adaptation Approach for Dynamic Air‑w.iting Recognition Using w.arable w.istbands w.th 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 w.i 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

w.arable w.istband 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 w.arable w.istband w.th selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel w.th hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** w.reless transmission from a w.-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random w.ist ***,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-w.iting of all numbers and *** proposed method facilitates smooth transitions betw.en multiple tasks w.thout 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 w.y of communication.

关键词： w.arable w.istband Self-supervised contrastive learning Dynamic gesture Air-w.iting Human-machine interaction