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

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 ***,we develop a vector sensor composed of lead zirconate titanate-electronic grade glass fiber composite filaments with oriented arrangement,capable of detecting minute anisotropic *** as-prepared vector sensor can identify the deformation directions even when subjected to an unprecedented nominal strain of 0.06%,thereby enabling its utility in accurately discerning the 5μm-height wrinkles 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 ***,when integrated with machine learning techniques,the sensor’s capability to recognize multi-signals enables it to differentiate between 10 types of fine textures with 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

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脉冲电流快速烧结纳米铜焊膏连接铜镍基板研究

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机械工程学报 2017年第4期53卷 34-42页

作者：黄圆田艳红江智王晨曦哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001

利用液相法合成均径为57.5 nm的纳米铜颗粒,并对纳米铜颗粒进行系统的表征,包括有扫描电子显微镜(Scanning electron microscope,SEM)、透射电子显微镜(Transmission electron microscope,TEM)、X射线衍射(X-ray diffraction,XRD)以及热重分析(Thermal gravity analysis,TGA)和差热分析(Differential thermal analysis,DTA),并利用超声手段将纳米铜颗粒均匀分散在水溶液中,从而得到了纳米铜焊膏。采取模板印刷的方法制备镍/纳米铜焊膏/铜的三明治结构,并研究不同脉冲电流烧结工艺下的三明治结构的剪切强度、截面微结构以及断口微结构特征。试验结果表明三明治结构的剪切强度随着电流的增加而增大,在电流为0.8 k A时,剪切强度可达到46.3 MPa,脉冲电流烧结纳米铜焊膏连接铜和镍基板在短时间(小于200 ms)内快速获得了高致密度、性能优良的焊点结构,同时纳米铜颗粒之间以及纳米铜颗粒与微米级的铜基板和镍基板之间实现了牢固的冶金连接。通过分析经脉冲电流烧结后得到的纳米铜焊膏内部的显微组织特征,提出了脉冲电流烧结纳米铜焊膏的烧结机理。

关键词：纳米铜颗粒脉冲电流烧结快速连接

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Calculation of the energy dependence of fission fragments yields and kinetic energy distributions for neutron-induced ^(235)U fission

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Chinese Physics C 2024年第8期48卷 159-169页

作者： Ya-Ning Han Zheng Wei Yi-Xuan Wang Dong-Ying Huo Peng-Qi Zhang Ming Li Jun Ma Kang Wu Yong-Guang Zheng Yuan He zhi-Yong Deng tian-zhi jiang Xiang-Lin Zhuo Jin Li Yun Zhang Yu Zhang Jun-Run Wang Xiao-Dong Su Ze-En Yao School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China Engineering Research Center for Neutron Application Technology Ministry of EducationLanzhou UniversityLanzhou 730000China MOE Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China Nuclear Power Institute of China Chengdu 610000China

Fission fragments yields and average total kinetic energy are fundamental nuclear data for nuclear energy applications and the study of nuclear *** fission products,such as ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,serve as burnup monitors,assessing the number of fissions induced by neutrons on ^(235)***,current experimental data for these fission products worldwide are inconsistent,introducing significant uncertainty into related scientific *** this study,we employed the Potential-driving Model to calculate the independent yields of ^(235)U and evaluate its advantages in such ***,we investigated the energy dependence of independent yields to select important ***,we calculated the cumulative yields of ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,and compared them with existing literature data to explore the energy dependence of fission products for ^(235)*** the lack of fission product yield data above 14.8 MeV,we extended our calculated incident neutron energy to 20 MeV,aiming to support future scientific *** Geant4 physical model does not consider the influence of incident neutron energy on the average total kinetic energy of fission fragments;thus,we introduced the excitation function of the total kinetic energy of fission fragments recommended by Madland et al.,which effectively describes the experimental data of the average total kinetic energy of fragments formed in ^(235)U *** this paper,we comprehensively discuss the energy dependence of fission product yields and average total kinetic energy.

关键词： ^(235)U(n f) potential-driving model fission yields kinetic energies energy dependence

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长壁工作面巷道锚网索撤除支护对其变形的影响

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内蒙古煤炭经济 2019年第7期 144-144,151页

作者：田之江内蒙古准格尔旗力量煤业有限公司内蒙古鄂尔多斯010499

长壁工作面巷道锚网索撤除支护对其变形和稳定性起重要作用,同时,拆除锚网索具可重复使用,节约支护成本。本文模拟锚杆网索拆除后巷道围岩的变形行为,并用FLAC3D模拟锚杆网索支护释放前后工作面煤侧壁的稳定性,分析工作面煤壁侧的特征... 详细信息

长壁工作面巷道锚网索撤除支护对其变形和稳定性起重要作用,同时,拆除锚网索具可重复使用,节约支护成本。本文模拟锚杆网索拆除后巷道围岩的变形行为,并用FLAC3D模拟锚杆网索支护释放前后工作面煤侧壁的稳定性,分析工作面煤壁侧的特征。结果表明,锚杆网索支护释放后,其受力、变形明显减小,且随悬顶距离的增加,减小幅度越来越大。

关键词：巷道变形锚网索支护支护解除莫尔-库仑模型 FLAC3D模拟

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Synthesis of chiral phosphine derivatives through a copper（I）-catalyzed desymmetric SNAr reaction

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Science China Chemistry 2025年

作者： Shuai Zhang Pei-zhi Liu Yan-Bo Li Qi Zhang Jun-Zhao Xiao Yi-Fan Wang tian-Yu Wei Jia-Wei jiang Ye Wang Qian Peng Liang Yin Key Laboratory of Fluorine and Nitrogen Chemistry and Advanced Materials Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences State Key Laboratory of Elemento-Organic Chemistry and tianjin Key Laboratory of Biosensing and Molecular Recognition College of Chemistry Frontiers Science Center for New Organic Matter Nankai University Haihe Laboratory of Sustainable Chemical Transformations

Axially chiral phosphines are a class of extremely important ligands in asymmetric catalysis. Herein, an unprecedented copper（I）-catalyzed asymmetric SNAr reaction with HP（S）R2is uncovered, which delivers a series of axially chiral phosphine derivatives in high yields with excellent enantioselectivity. Furthermore, the diastereoselective reaction with the kinetic resolution of racemic HP（S）ArR proceeds smoothly, providing the products with moderate diastereoselectivity and excellent enantioselectivity. Control experiments indicate that HP（S）Ph2is much more active than HPPh2and HP（O）Ph2as the pronucleophile in the present reaction. It is found that the SNAr reaction （the first SNAr） proceeds in a desymmetric manner, providing the desired chiral products while a continued SNAr reaction （the second SNAr） slightly occurs in a kinetic resolution manner in the present catalytic system, which enhances the ee of the desired chiral products. DFTcalculations support a concerted reaction pathway rather than a step-wise mechanism. Finally, axially chiral olefin-phosphines produced by the present method work as suitable ligands in Pdcatalyzed asymmetric allylic substitution with C-, N-, and O-nucleophiles and Rh-catalyzed asymmetric addition of arylboronic acid to benzil.

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Homologous CoS2 interface with directed electron transfer and strong chloridion repulsion for efficient seawater oxidation

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Science China Chemistry 2025年

作者： Yuan tian jiang-Bo Chen Jie Ying Ge tian Yu-Xuan Xiao Yi Lu Si-Ming Wu Wei Geng Ling Shen Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering and Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-Sen University National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Seawater electrolysis is a highly promising method to produce high energy density hydrogen,especially in dry areas that have scarce freshwater ***,application of seawater electrolysis is confronted by two major problems associated with catalysts employed for the anodic oxygen evolution reaction （OER） including the competitive hypochlorite evolution reaction（HCER） and strong chloridion （Cl–） triggered *** studies aimed at overcoming these problems,a facile method has been developed to synthesize a homologous CoS2heterojunction as an OER *** to a difference in work functions at the interface and increased electron density,this material has directed electron transfer and strong chloridion repulsion properties,*** have shown that CoS2achieves low overpotentials of 289 and 322 mV at 10 mA cm-2current density in respective alkaline （1 M KOH） and alkaline simulated seawater ***,the outstanding stability of CoS2is reflected in a negligible decline in activity during promotion of the OER for 100 *** of density functional theory calculations reveal that the homologous CoS2heterojunction promotes directed electron transport for optimizing adsorption/desorption of reactive species and heightens the Cl-adsorption energy for strongly repulsing Cl-,phenomena that enhance OER performance in alkaline simulated seawater.

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肺动脉前窦起源室性心动过速1例

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临床心血管病杂志 2016年第12期32卷 1271-1272页

作者：黄晶杨龙田水田龙海蒋智赵可仙田野郑亚西贵州省人民医院心内科贵阳550002

1病例资料患者,女,42岁,反复心悸1个月,24h动态心电图记录到室性心动过速（VT）,余辅助检查及体征未见异常。行心内电生理检查及射频消融术治疗,术中静滴异丙肾上腺素极易诱发出VT（图1a）,体表心电图支持右室流出道（RVOT）游离壁起源。

关键词：肺动脉室性心动过速心电图消融

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Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun jiang Zhenjie Lu Yanwen Ding Shujun Liu zhijie Qi tian Tang Yunfan Zhang zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

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Unilateral cerebral ischemia differentially damages cortical projection neurons and causes ipsilateral visual defects in mice

Unilateral cerebral ischemia differentially damages cortical...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Jian XIAO,Xian-tiang ZHOU,tian jiang,zhi-Na zhi,Qu LI,Yue-E ZHAO,Jia QU,Jie-Guang CHEN~* Key Laboratory of Visual Science,National Ministry of Health,and School of Optometry and Ophthalmology, Wenzhou Medical College,Wenzhou 325027,China

＜正＞Objective Decreased blood flow to the brain causes stroke and damage to neuronal networks. Neuronal damage occurs not only in the infarct core,but also in areas away from the infarcts by retrograde neuronal *** Study was aimed to determine if afferent cortical projection neurons had different damages after permanent middle cerebral artery（MCA）occlusion in *** cortical ischemia impairs sensations,the objective of this study was to investigate whether MCA occlusion might induce visual *** The distal MCA of the right hemisphere was directly occluded in mice and the ischemic areas were assessed histologically. Afferent projection neurons to the ischemic cortex were examined by retrograde *** Thy1-YFP mice were used to determine how MCA occlusion affects efferent projection neurons in layer *** evaluate visual functions of ischemic mice,optomotor responses and Flash Visual Evoked Potential（FVEP）were *** optomotor response of the ipsilateral eye was reduced and the latencies of FVEP increased in the monocular visual cortex of the ischemic *** Unilateral cortical ischemia appeared 24 to 72 h after occlusion,but disappeared after one *** subcortical neurons and afferent thalamocortical neurons disappeared,whereas afferent corticocortical neurons were functionally impaired 48 h *** addition,the optomotor response of the ipsilateral eye was reduced and the latencies of FVEP increased in the monocular visual cortex of the ischemic *** Ischemia causes different forms of retrograde damage to callosal and thalamocortical projection *** results show that focal cerebral ischemia produces ipsilateral visual disturbances in mice and may provide a platform for further investigation of the relationship between cortical ischemia and visual function.

关键词： corpus callosum optomotor response MCA occlusion cerebral ischemia retrograde degeneration

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Multiproduct and multistage integrated production planning model and algorithm based on an available production capacity network

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1343-1352页

作者： zhi-min Lü tian-ru jiang Zai-wei Li Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China China Ordins Group CO. LTDBeijing 100089China

This research attempts to devise a multistage and multiproduct short-term integrative production plan that can dynamically change based on the order priority and virtual occupancy for application in steel plants. Considering factors such as the delivery time, varietal compatibility between different products, production capacity of variety per hour, minimum or maximum batch size, and transfer time, we propose an available production capacity network with varietal compatibility and virtual occupancy for enhancing production plan implementation and quick adjustment in the case of dynamic production changes. Here available means the remaining production capacity after virtual *** quickly build an available production capacity network and increase the speed of algorithm solving, constraint selection and cutting methods with order priority were used for model solving. Finally, the genetic algorithm improved with local search was used to optimize the proposed production plan and significantly reduce the order delay rate. The validity of the proposed model and algorithm was numerically verified by simulating actual production practices. The simulation results demonstrate that the model and improved algorithm result in an effective production plan.

关键词： short-term integrated plan constraint satisfaction model available production capacity varietal compatibility virtual capacity occupancy

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