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Textile-Based Strain Sensor for Human Motion detection

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Energy & Environmental Materials 2020年第1期3卷 80-100页

作者： Jilong Wang Chunhong Lu kun zhang Key Laboratory of Textile Science&Technology of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China

Human motion analysis consists of real-time monitoring and recording of human body’s kinematics. It is very essential to track ambulatory and dailylife human motion, which is crucial for many applications and *** textiles(e-textiles) afford a valid alternative to traditional solidstate sensors due to their merits of low cost, lightweight, flexibility, and feasibility to fit various human bodies. In this mini-review, textile-based sensor platforms and human motion analysis are well discussed in Section ***, theoretical principles of textile-based strain sensors are introduced including resistive, capacitive, and piezoelectrical sensors. Section 3 focuses on various types of textile materials that are functionalized as sensing systems by intrinsic or extrinsic modifications. Section 4 summaries various types of e-textile-based strain sensors for human motion analysis. The final two sections mainly present perspectives and challenges, and conclusions,respectively.

关键词： human motion strain sensor textile

Recent Progress in Applications of the Conditional Nonlinear Optimal Perturbation Approach to Atmosphere-Ocean Sciences

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Chinese Annals of Mathematics,Series B 2022年第6期43卷 1033-1048页

作者： Mu MU kun zhang Qiang WANG department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences Fudan UniversityShanghai 200438China CMA-FDU Joint Laboratory of Marine Meteorology Shanghai 200438China Shanghai Frontiers Science Center of Atmosphere-Ocean Interaction Shanghai 200438China CAS Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of Sciences and Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Key Laboratory of Marine Hazards Forecasting Ministry of Natural ResourcesHohai UniversityNanjing 210098China College of Oceanography Hohai UniversityNanjing 210098China

The conditional nonlinear optimal perturbation(CNOP for short) approach is a powerful tool for predictability and targeted observation studies in atmosphere-ocean sciences. By fully considering nonlinearity under appropriate physical constraints, the CNOP approach can reveal the optimal perturbations of initial conditions, boundary conditions, model parameters, and model tendencies that cause the largest simulation or prediction uncertainties. This paper reviews the progress of applying the CNOP approach to atmosphere-ocean sciences during the past five years. Following an introduction of the CNOP approach, the algorithm developments for solving the CNOP are ***, recent CNOP applications, including predictability studies of some high-impact ocean-atmospheric environmental events, ensemble forecast, parameter sensitivity analysis, uncertainty estimation caused by errors of model tendency or boundary condition, are reviewed. Finally, a summary and discussion on future applications and challenges of the CNOP approach are presented.

关键词： Conditional nonlinear optimal perturbation Atmosphere Ocean Targeted observation Predictability

Revision to Kowalskia from the Houhecun Fauna and a New Discovery of Tscherskia(Cricetidae, Rodentia) from the Youhe Fauna of Weinan, Shaanxi Province, China

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1073-1079页

作者： XIE kun zhang Yunxiang LI Yongxiang State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University 229 North Taibai RoadXi'an 710069China

The fossil hamster(an isolated m1) from the early Early Pleistocene Houhecun fauna found in Dali, Weinan, Shaanxi, China, originally identified as Kowalskia dalinica, is reexamined. Its unique characters, including a high crown, very small degree of division of the anteroconid and relatively large size, is taken as evidence of its attribution to the genus Sinocricetus, instead of Kowalskia(junior synonym of Neocricetodon) suggested by the original author. Therefore, the specific name of the species established based on this m1 should be changed to S. dalinicus(Wang, 1988). S. dalinicus probably has a relatively close affinity with S. major Li, 2010, but there are still some obvious differences of characters between them. The discovery of S. dalinicus in the Houhecun fauna confirms that the genus indeed survived into the Pleistocene. A broken hamster mandible, which was found in Weinan, Shaanxi, China and belongs to the late Pliocene Youhe fauna, is also described here and identified as Tscherskia sp.. This specimen represents the earliest Tscherskia in Asia so far, but fails to refute the hypothesis that the genus originated in Europe during the early Pliocene.

关键词： Houhecun fauna Youhe fauna Sinocricetus Tscherskia Kowalskia Neocricetodon

Impacts of parameter uncertainties on deep chlorophyll maximum simulation revealed by the CNOP-P approach

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Journal of Oceanology and Limnology 2020年第5期38卷 1382-1393页

作者： GAO Yongli MU Mu zhang kun Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China College of Science China University of Petroleum(East China)Qingdao 266580China Institute of Atmospheric Sciences Fudan UniversityShanghai 200433China Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Parameter uncertainty is a primary source of uncertainty in ocean ecosystem *** deep chlorophyll maximum(DCM)is a ubiquitous ecological phenomenon in the *** a theoretical nutrients-phytoplankton model and the conditional nonlinear optimal perturbation approach related to parameters,we investigated the eff ects of parameter uncertainties on DCM ***,the sensitivity of single parameter was *** sensitivity ranking of 10 parameters was obtained by analyzing the top four specifi *** most sensitive parameter(background turbidity)aff ects the light supply for DCM formation,whereas the other three parameters(nutrient content of phytoplankton,nutrient recycling coeffi cient,and vertical turbulent diff usivity)control nutrient *** explore the interactions among diff erent parameters,the sensitivity of multiple parameters was further studied by examining combinations of four *** results show that background turbidity is replaced by the phytoplankton loss rate in the optimal parameter *** addition,we found that interactions among these parameters are responsible for such diff ***,we found that reducing the uncertainties of sensitive parameters could improve DCM simulations *** with the sensitive parameters identifi ed in the single parameter analysis,reducing parameter uncertainties in the optimal combination produced better model *** study shows the importance of nonlinear interactions among various parameters in identifying sensitive *** the future,the conditional nonlinear optimal perturbation approach related to parameters,especially optimal parameter combinations,is expected to greatly improve DCM simulations in complex ecosystem models.

关键词： deep chlorophyll maximum(DCM)simulation parameter uncertainty conditional nonlinear optimal perturbation related to parameters(CNOP-P) sensitivity

Impact of Robinia pseudoacacia stand conversion on soil properties and bacterial community composition in Mount Tai,China

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Forest Ecosystems 2021年第2期8卷 253-264页

作者： kun Li Xu Han Ruiqiang Ni Ge Shi Sergio de-Miguel Chuanrong Li Weixing Shen Yikun zhang Xingzhong zhang Mountain Tai Forest Ecosystem Research Station of State Forestry Administration/Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River Tai’an 271018ShandongChina department of Crop and Forest Sciences University of LleidaAv.Alcalde Rovira Roure 191E25198 LleidaSpain Joint Research Unit CTFC–AGROTECNIO Av.Alcalde Rovira Roure 191E25198 LleidaSpain Mount Tai Scenic Spot Management Committee Tai’an 271000 ShandongChina

Background:Robinia pseudoacacia is a widely planted pioneer tree species in reforestations on barren mountains in northern *** of its nitrogen-fixing ability,it can play a positive role in soil and forest *** clearcutting of planted stands,*** stands become coppice *** impacts of shifting from seedling to coppice stands on soil bacterial community and soil properties have not been wel *** study aims to quantify how soil properties and bacterial community composition vary between planted seedling versus coppice ***:Nine 20 m×20 m plots were randomly selected in seedling and coppice *** bulk soil and rhizosphere soil were sampled in summer *** soil was sampled at 10 cm from the soil surface using a soil *** soil samples were col ected using a *** soil samples were transported to the laboratory for chemical analysis,and bacterial community composition and diversity was obtained through DNA extraction,16 S r RNA gene amplification and high-throughput ***:The results showed that,compared to seedling plantations,soil quality decreased significantly in coppice stands,but without affecting soil exchangeable Mg^(2+) and K^(+).Total carbon(C)and nitrogen(N)were lower in the rhizosphere than in bulk soil,whereas nutrient availability showed an opposite *** conversion from seedling to coppice plantations was also related to significant differences in soil bacterial community structure and to the reduction of soil bacterialα-*** component analysis(PCA)showed that bacterial community composition was similar in both bulk and rhizosphere soils in second-generation coppice *** y,the conversion from seedling to coppice stands increased the relative abundance of Proteobacteria and Rhizobium,but reduced that of Actinobacteria,which may result in a decline of soil nutrient *** tests revealed that C,N,soil organic matte

关键词： Black locust coppice plantation Forest restoration Afforestation Microbial structure Soil nutrient Soil quality

Corrosion Resistance of AZ91 Mg Alloy Modified by High-Current Pulsed Electron Beam

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 218-226页

作者： Peng-Peng Wu kun-kun deng Kai-Bo Nie Zhong-Zhong zhang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of Technology

The high-current pulsed electron beam(HCPEB) treatment with current density 6 J/cm^2 was applied on AZ91 Mg alloy to improve its corrosion resistance. Results showed that the net-like Mg_(17)Al_(12) disappeared on the surface of AZ91 Mg alloy after irradiation by HCPEB, which was instead of supersaturated Al element on the surface. Nevertheless, the application of HCPEB also led to the formation of crater-like and groove-like structures as well as micro-cracks on the surface of AZ91 Mg alloy. After HCPEB treatment by 3, 5 and 10 pulses, the AZ91 Mg alloy exhibited better corrosion ***, the increasing amount of micro-cracks reduced the anti-corrosive properties of AZ91 Mg alloy as the pulse increased to 20 and 30.

关键词： High-current pulsed electron beam(HCPEB) Corrosion resistance Electrochemical impedance spectroscopy(EIS) AZ91 Mg alloy Microstructure

Comparative proteomic analysis of plasma exosomes reveals the functional contribution of N-acetyl-alpha-glucosaminidase to Parkinson’s disease

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Neural Regeneration Research 2025年第10期20卷 2998-3012页

作者： Yuan Zhao Yidan zhang Xin Liu Jian zhang Ya Gao Shuyue Li Cui Chang Xiang Liu Guofeng Yang department of Geriatrics Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina department of Neurosurgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina

Parkinson’s disease is the second most common progressive neurodegenerative disorder,and few reliable biomarkers are available to track disease *** proteins,DNA,mRNA,and lipids carried by exosomes reflect intracellular changes,and thus can serve as biomarkers for a variety of *** this study,we investigated alterations in the protein content of plasma exosomes derived from patients with Parkinson’s disease and the potential therapeutic roles of these proteins in Parkinson’s *** a tandem mass tag-based quantitative proteomics approach,we characterized the proteomes of plasma exosomes derived from individual patients,identified exosomal protein signatures specific to patients with Parkinson’s disease,and identified N-acetyl-alpha-glucosaminidase as a differentially expressed protein.N-acetyl-alpha-glucosaminidase expression levels in exosomes from the plasma of patients and healthy controls were validated by enzyme-linked immunosorbent assay and western *** results demonstrated that the exosomal N-acetyl-alpha-glucosaminidase concentration was not only lower in Parkinson’s disease,but also decreased with increasing Hoehn-Yahr stage,suggesting that N-acetyl-alpha-glucosaminidase could be used to rapidly evaluate Parkinson’s disease ***,western blot and immunohistochemistry analysis showed that N-acetyl-alpha-glucosaminidase levels were markedly reduced both in cells treated with 1-methyl-4-phenylpyridinium and cells overexpressingα-synuclein compared with control ***,N-acetyl-alpha-glucosaminidase overexpression significantly increased cell viability and inhibitedα-synuclein expression in 1-methyl-4-phenylpyridinium-treated *** together,our findings demonstrate for the first time that exosomal N-acetyl-alpha-glucosaminidase may serve as a biomarker for Parkinson’s disease diagnosis,and that N-acetyl-alpha-glucosaminidase may reduceα-synuclein expression and 1-methyl-4-phenylpyridinium-induced n

关键词： biomarker diagnosis exosomes N-acetyl-alpha-glucosaminidase Parkinson’s disease proteomic α-synuclein

Experimental investigation of granular friction behaviors during reciprocating sliding

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Friction 2022年第5期10卷 732-747页

作者： Xuejie zhang Wei SUN Wei WANG kun LIU Institute of Tribology School of Mechanical EngineeringHefei University of TechnologyHefei 230009China

Granular friction behaviors are crucial for understanding the ubiquitous packing and flow phenomena in nature and industrial *** this study,a customized experimental apparatus that can simultaneously measure the time history of normal and tangential forces on the inside-shearing unit is employed to investigate the granular friction behaviors during a linear reciprocating sliding *** is observed that the evolution behaviors of two normal forces distributed separately on the shearing unit can qualitatively reflect the effects of the force chain *** the half-loop of the reciprocating sliding,the total normal force,which indicates the load-bearing capacity of the granular system,experiences the following typical stages:decreases abruptly and stabilizes momentarily,further decreases significantly to the minimum,gradually increases to the maximum,and then remains *** stages are associated closely with the relaxation,collapse,reconstruction,and stabilization of the force chain,***,the coefficient of friction(COF)can reach a stable value rapidly within the initial sliding stage and subsequently remain *** average COF within stable ranges decreases significantly with the external load G in the power function form,G^(-0.5).Meanwhile,the COF increases slightly with the sliding ***,a complete illustration of the dependences of the granular COF on the external load and sliding velocity is *** study contributes to granular friction research by providing an innovative experimental approach for directly measuring the COF and implicitly correlating the evolution of the force chain network.

关键词： granular friction coefficient of friction force chains reciprocating sliding

Electrochemical radical-polar crossover:a radical approach to polar chemistry

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Science China Chemistry 2024年第2期67卷 450-470页

作者： Zhoumei Tan Haonan zhang kun Xu Chengchu Zeng Faculty of Environment and Life Beijing University of TechnologyBeijing100124China

Radical-polar crossover(RPC) reaction bridges the gap between one-and two-electron reactivities,thus providing an ideal solution to overcome the limitations of both radical and polar *** this manifold,organic electrochemistry provides a uniquely facile strategy to access a diverse array of radical intermediates,thus broadening the chemical space of the RPC *** review highlights the synthetic advances in the field of electrochemical RPC reactions since 2020,with an emphasis on the substrate scope,reaction limitation and mechanistic *** related RPC reactions are categorized as netoxidative,net-reductive,or redox neutral transformations.

关键词： electrosynthesis radical-polar crossover radical chemistry polar chemistry alkene functionalization