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Stretchable spring-sheathed yarn sensor for 3D dynamic body reconstruction assisted by transfer learning

InfoMat 2024年第4期6卷 109-123页

作者： Ronghui Wu Liyun Ma Zhiyong Chen Yating Shi Yifang Shi Sai Liu Xiaowei Chen Aniruddha Patil Zaifu Lin Yifan Zhang Chuan Zhang Rui Yu Changyong Wang Jin Zhou Shihui Guo Weidong Yu Xiang Yang Liu College of Ocean and Earth sciences State Key Laboratory of Marine Environmental ScienceCollege of Physical Science and TechnologySchool of InformaticsXiamen UniversityXiamenthe People's Republic of China Prizker School of Molecular Engineering The University of ChicagoChicagoIllinoisUSA Key Laboratory of Textile science&technology Ministry of EducationCollege of TextilesDonghua UniversityShanghaithe People's Republic of China College of Textile science and Engineering(International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhouthe People's Republic of China Chongqing Academy of Metrology and Quality Inspection Chongqingthe People's Republic of China Beijing Institute of Basic Medical sciences Beijingthe People's Republic of China

A wearable sensing system that can reconstruct dynamic 3D human body models for virtual cloth fitting is highly important in the era of information and ***,few research has been conducted regarding conformal sen-sors for accurately measuring the human body circumferences for dynamic 3D human body ***,we develop a stretchable spring-sheathed yarn sensor(SSYS)as a smart ruler,for precisely measuring the circumference of human bodies and long-term tracking the movement for the dynamic 3D body *** SSYS has a robust property,high resilience,high stability(>18000),and ultrafast response(12 ms)to external *** is also washable,wearable,tailorable,and durable for long-time ***,geometric,and mechanical behaviors of the SSYS are systematically investigated both theoretically and *** addition,a transfer learning algorithm that bridges the discrepancy of real and virtual sensing performance is devel-oped,enabling a small body circumference measurement error of 1.79%,notice-ably lower than that of traditional learning ***,3D human bodies that are numerically consistent with the actual bodies are *** 3D dynamic human body reconstruction based on the wearing sensing sys-tem and transfer learning algorithm enables excellent virtual fitting and shirt customization in a smart and highly efficient *** wearable sensing technology shows great potential in human-computer interaction,intelligent fitting,specialized protection,sports activities,and human physiological health tracking.

关键词： 3D body reconstruction remote personalized clothes customization transfer learning wearable sensing system yarn sensor array

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Magnetic interference gonioapparent thin film based on metal-dielectric-metal structure for optical security devices

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Optoelectronics Letters 2020年第2期16卷 97-102页

作者： CHEN Nan WANG Zhi-xun CHEN Hao CHEN Lin ZHAO Yan WANG Yu-si JIANG Peng-wei BU Yi-kun School of Electronic science and Engineering(National Model Microelectronics College) Xiamen UniversityXiamen 361005China

In recent years, magnetic interference thin films have gained wide attention in optical security devices field by virtue of their gonioapparent and dynamic 3D effects. Based on the color mechanism of metal-dielectric Fabry-Perot structure, a novel seven-layer magnetic thin film structure is proposed by adopting the ultrathin metal layer as a bonding layer and a pure metallic Ni layer as a magnetic layer as well as a reflective layer. Color target optimization optimac method is utilized that realizes the seven-layer metal-dielectric optically variable magnetic thin film structure with green at the normal incidence and purple-red at 60°. The structure effectively solves the delaminate problem and simplifies the multilayer structure. Through different combined magnetic field designs, the magnetic orientation experiment of the prepared magnetic optically variable thin film is carried out, and the 3 D anti-counterfeiting with remarkable dynamic color change effect is obtained, which provides a new solution for optical security devices.

关键词： film structure apparent

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Visible-light all-fiber vortex lasers based on mode selective couplers

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Chinese Physics B 2020年第9期29卷 136-141页

作者： Chuchu Dong Jinhai Zou Hongjian Wang Han Yao Xianglong Zeng Yikun Bu Zhengqian Luo Department of Electronic Engineering Xiamen UniversityXiamen 361005China The Key Laboratory of Specialty Fiber Optics and Optical Access Network Shanghai UniversityShanghai 200444China

We demonstrate visible-light all-fiber vortex lasers by incorporating the home-made mode selective couplers (MSCs). The MSC at green or red wavebands is fabricated by specially designing and fusing a single-mode fiber (SMF) and a few-mode fiber (FMF). The MSCs inserted into visible fiber cavities act as power splitters and mode converters from the LP01 to LP11 mode at green and red wavelengths, respectively. The red-light all-fiber vortex laser is formed by a 10-cm Pr3+/Yb3+:ZBLAN fiber, a fiber Bragg grating, a fiber end-facet mirror and the MSC at 635 nm, which generates vortex beams with OAM±1 at 634.4 nm and an output power of 13 mW. The green-light all-fiber vortex laser consists of a 12-cm Ho3+:ZBLAN fiber, two fiber pigtail mirrors, and the MSC at 550 nm, which generates vortex beams with OAM±1 at 548.9 nm and an output power of 3 mW.

关键词： fiber laser vortex laser mode selective coupler visible-light

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Tuning SMSI to stabilize metallic Pd species:A case study on Pd/TiO_(2) for HCHO oxidation

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Chinese Chemical Letters 2024年第3期35卷 162-166页

作者： Chunying Wang Xiaofeng Liu Jingyi Wang Yaobin Li Shaohua Xie Fudong Liu Changbin Zhang Yuming Zheng Wenpo Shan Hong He Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant ConversionInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationChinese Academy of SciencesNingbo 315800China Department of Civil Environmentaland Construction Engineering(CECE)Catalysis Cluster for Renewable Energy and Chemical Transformations(REACT)Nano Science Technology Center(NSTC)University of Central FloridaOrlandoFL 32816USA State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing 100085China

Pretreatment of the carrier for supported catalysts can effectively improve the strong metal-support interaction(SMSI)and increase the dispersion of precious metals,which are critical to many important catalytic *** this work,we tuned SMSI on Pd/TiO_(2)catalysts through inducing surface defects of TiO_(2)by pretreated with different atmospheres(H_(2)/N_(2),N_(2),O_(2)/N_(2))at the high temperature(800℃).Multiple characterization results illustrated that surface defects anchored Pd species and thus enhanced their *** reduction,Ti^(3+)species formed and transferred onto the metallic Pd species and then induced SMSI,which effectively stabilize Pd species in the metallic *** stronger MSI,the more stability of Pd *** a case,Pd/TiO_(2)–800H_(2),with strongest MSI,displayed the best HCHO oxidation performance at low temperature(10℃).

关键词： Pd/TiO_(2) Surface defects SMSI Formaldehyde Stability of Pd species

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Visual acuity of urban and rural adults in a coastal province of southern China:the Fujian Eye Study

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International Journal of Ophthalmology(English edition) 2022年第7期15卷 1157-1164页

作者： Yang Li Qin-Rui Hu Xiao-Xin Li Yong-Hua Hu Bin Wang Xue-Ying Qin Tao Ren Eye Institute and Affiliated xiamen Eye Center of xiamen University School of MedicineXiamen UniversityXiamen 361003Fujian ProvinceChina Department of Epidemiology and Biostatistics School of Public HealthPeking University Health Science CentreBeijing 100191China Department of Ophthalmology Peking University People’s HospitalBeijing 100044China

AIM:To evaluate the vision status and sociodemographic associations of visual acuity(VA)in an urban and rural population in a coastal province of southern ***:The Fujian Eye Study,a population-based cross-sectional study,was performed from May 2018 to October *** 10044 participants over 50 years old from all nine cities in Fujian Province were enrolled,and underwent a questionnaire and a series of standard physical and ocular *** was measured by E Standard Logarithmic Visual Acuity Chart(GB 11533-1989).Data was double entered with Epi Data v3.1 for data collation and Stata/SE statistical software v15.1 was used to analyze the ***:Totally 8211(81.8%)participants were finally included and were divided into urban populations(4678 subjects),rural populations(n=3533),coastal residents(n=6434),and inland residents(1777 subjects);4836 participants were *** mean age was 64.39±8.87 y(median 64 y;range 50-98 y).The mean presenting VA was 0.61±0.30(0.23±0.27 log MAR),and the mean best correctedvisual acuity(BCVA)was 0.82±0.28(0.08±0.19 log MAR).In the multiple regression analysis,BCVA was significantly correlated with several socioeconomic and biologic factors,including age(P<0.001),education level(P<0.001),income(P=0.005),rural residency(P<0.001),inland residency(P=0.001)and refractive error(P<0.001),while sex(P=0.194)was independent with ***:Accessible services and eye health policies targeting the elderly,people with high myopia and people living in rural or inland areas are needed.

关键词： cross sectional eye study presenting visual acuity best corrected visual acuity urban and rural coastal and inland

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Mg_(2)Sn-induced whisker growth on the surfaces of Mg/Sn/Mg ultrasonic-assisted soldering joints

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China Welding 2022年第1期31卷 47-59页

作者： Cao Huijun Li shiqin Zhang Yinggan Zhu Yichen Li Mingyu Zhang Zhihao College of Materials Xiamen UniversityXiamen 361000China Shenzhen Research Institute Xiamen UniversityShenzhen 518055China School of Transportation Engineering Xiamen City UniversityXiamen 361005China Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China

In this paper,the phenomena of Mg_(2)Sn-induced Sn whisker growth were explored on the surfaces of Mg/Sn/Mg ultrasonic-assisted soldering joints after aging *** in-situ observation and thermal analysis confirmed that the formation and the corrosion of Mg_(2)Sn nanoparticles were the dominant reason of Sn whisker *** Mg_(2)Sn accumulation at the grain boundaries would pin the dislocation slip and affect the continuity of whisker growth,and the boundary angle would thus play a decisive role in the growth shape of Sn whiskers due to the pining effect of Mg_(2)*** study might be conducive to elucidating the growth behavior of Sn whiskers and provide the exploration strategy to further improve the bonding strength of Mg/Sn/Mg ultrasonic-assisted soldering joints.

关键词： Mg alloys ultrasonic wave solder joint Sn whisker microstructure growth mechanism

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Surface Functionalization of PEO Nanofibers Using a TiO_(2) Suspension as Sheath Fluid in a Modified Coaxial Electrospinning Process

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Chemical Research in Chinese Universities 2021年第3期37卷 571-577页

作者： ZHENG Gaofeng PENG Hao JIANG Jiaxin KANG Guoyi LIU Juan ZHENG Jianyi LIU Yifang Department of Instrumental and Electrical Engineering Xiamen UniversityXiamen361102P.R.China Fujian Innovation Center of Additive Manufacturing Fuzhou350118P.R.China

Convenient and integration fabrication process is a key issue for the application of functional nanofibers.A surface functionalization method was developed based on coaxial electrospinning to produce ultraviolet(UV)protection *** titanium dioxide(TiO_(2))nanoparticles suspension was delivered through the shell channel of the coaxial spinneret,by which the aggregation of TiO_(2) nanoparticles was overcome and the distribution uniformity on the surface of polyethylene oxide(PEO)nanofiber was *** the content of TiO_(2) increasing from 0 to 3%(mass fraction),the average diameter of nanofibers increased from(380±30)nm to(480±100)*** surface functionalization can be realized during the electrospinning process to gain PEO/TiO_(2) composite nanofibers *** uniform distribution of TiO_(2) nanoparticles on the surface of nanofibers enhanced the UV absorption and resistance *** maximum UV protection factor(UPF)value of composite nanofibers reaches *** work presented a novel surface-functionalized way for the preparation of composite nanofiber,which has great application potential in the field of micro/nano system integration fabrication.

关键词： Coaxial electrospinning Surface functionalization TiO_(2)nanoparticle Composite nanofiber UV protection

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The effect of hydrogen reduction of α-MnO_(2) on formaldehyde oxidation: The roles of oxygen vacancies

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Chinese Chemical Letters 2023年第3期34卷 171-174页

作者： Liping Zhou Chunying Wang Yaobin Li Xiaofeng Liu Hua Deng Wenpo Shan Hong He College of Resources and Environmental sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant ConversionInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

A series of α-MnO_(2) catalysts with various Mn valence states were treated by hydrogen reduction for different periods of time. Their catalytic capacity for formaldehyde(HCHO) oxidation was evaluated. The results indicated that hydrogen reduction dramatically improves the catalytic performance of α-MnO_(2) in HCHO oxidation. The α-MnO_(2) sample reduced by hydrogen for 2 h possessed superior activity and could completely oxidize 150 ppm HCHO to CO_(2) and H_(2)O at 70℃. Multiple characterization results illustrated that hydrogen reduction contributed to the production of more oxygen vacancies. The oxygen vacancies on the catalyst surface enhanced the adsorption, activation and mobility of O_(2) molecules, and thereby enhanced HCHO catalytic oxidation. This study provides novel insight into the design of outstanding MnO_x catalysts for HCHO oxidation at low temperature.

关键词： Hydrogen reduction α-MnO_(2) Formaldehyde oxidation Oxygen vacancies

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Identification of potential anti-pneumonia pharmacological components of Glycyrrhizae Radix et Rhizoma after the treatment with Gan An He Ji oral liquid

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Journal of Pharmaceutical Analysis 2022年第6期12卷 839-851页

作者： Xiaojuan Jiang Yihua Lin Yunlong Wu Caixia Yuan Xuli Lang Jiayun Chen Chunyan Zhu Xinyi Yang Yu Huang Hao Wang Caisheng Wu Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cell Stress Biology School of Pharmaceutical SciencesXiamen UniversityXiamenFujian361102China Department of Respiratory and Critical Care Medicine The Third Clinical Medical CollegeFujian Medical UniversityFuzhou350122China Department of Respiratory and Critical Care Medicine The First Affiliated Hospital of Xiamen UniversityXiamenFujian361003China Laboratory of Pharmacology/Beijing Key Laboratory of Antimicrobial Agents Institute of Medicinal BiotechnologyChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100050China School of Pharmacy Ningxia Medical UniversityYinchuan750004China School of Pharmacy Minzu University of ChinaBeijing100081China Key Laboratory of Ethnomedicine(Minzu University of China) Ministry of EducationBeijing100081China Institute of National Security Minzu University of ChinaBeijing100081China

Glycyrrhizae Radix et Rhizoma,a traditional Chinese medicine also known as Gan Cao(GC),is frequently included in clinical prescriptions for the treatment of ***,the pharmacological components of GC for pneumonia treatment are rarely *** An He Ji oral liquid(GAHJ)has a simple composition and contains GC liquid extracts and paregoric,and has been used clinically for many ***,GAHJ was selected as a compound preparation for the study of GC in the treatment of *** conducted an in vivo study of patients with pneumonia undergoing GAHJ treatments for three *** the intelligent mass spectrometry data-processing technologies to analyze the metabolism of GC in vivo,we obtained 168 related components of GC in humans,consisting of 24 prototype components and 144 metabolites,with 135 compounds screened in plasma and 82 in *** analysis of the metabolic transformation relationship and relative exposure,six components(liquiritin,liquiritigenin,glycyrrhizin,glycyrrhetinic acid,daidzin,and formononetin)were selected as potential effective *** experimental results based on two animal pneumonia models and the inflammatory cell model showed that the mixture of these six components was effective in the treatment of pneumonia and lung injury and could effectively downregulate the level of inducible nitric oxide synthase(iNOS).Interestingly,glycyrrhetinic acid exhibited the strongest inhibition on iNOS and the highest exposure in *** following molecular dynamic simulations indicated a strong bond between glycyrrhetinic acid and ***,the current study provides a pharmaceutical basis for GC and reveals the possible corresponding mechanisms in pneumonia treatment.

关键词： Glycyrrhizae Radix et Rhizoma Pneumonia Active components Inducible nitric oxide synthase Glycyrrhetinic acid

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High-color-purity, high-brightness and angle-insensitive red structural color

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Chinese Optics Letters 2022年第2期20卷 111-117页

作者： Jintong Liu Kun Feng Yusi Wang Qingyuan Li Nan Chen Yikun Bu School of Electronic science and Engineering(National Model Microelectronics College) Xiamen UniversityXiamen 361005China

We propose a simple five-layer structure for creating red structural color, which has high color purity and high *** design is based on the superposition of a silver substrate and multilayer silicon material. Absorption at the shorter wavelengths of the structure is effectively guaranteed, and reflection at the longer wavelengths is well enhanced. The red structural color has a peak reflectivity of 91% and a colorimetric purity of 0.9. Moreover, the designed structure displays angle-invariant performance up to 60°. This kind of structure scheme is environmentally friendly with low fabrication cost,and it can play an important role in a variety of fields, such as color displays and image sensors.

关键词： structural colors absorption thin films

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