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The continuous evolution of 2D cell-traction forces quantification technology

The Innovation 2022年第6期3卷 31-32页

作者： Zhuo Liu Xi Cui Yubo Fan Zhou Li Key Laboratory of Biomechanics and Mechanobiology Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringSchool of Engineering MedicineBeihang UniversityBeijing 100191China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Cells generate traction forces by interacting with the extracellular matrix(ECM)during migration,contraction,invasion,and ***-traction forces(CTFs)are extremely small but have enormous biological *** has been discovered that CTFs serve a crucial role in regulating proliferation,differentiation,wound healing,morphogenesis,angiogenesis,inflammation,and tumor genesis by working together with biochemical signals to maintain a coherent framework for these processes.

关键词： invasion healing traction

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Di-defects synergy boost electrocatalysis hydrogen evolution over two-dimensional heterojunctions

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Nano Research 2022年第1期15卷 677-684页

作者： Yan Cui Xiaoyu Guo Jian Zhang Xing’ao Li Xinbao Zhu Wei Huang Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China New Energy Technology Engineering Lab of Jiangsu Province School of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(LAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)}127 West Youyi RoadXian 710072China

Electronic modulation on the inert basal plane of transition-metal dichalcogenides(TMDs)through vacancy defect excitation,although extremely challenging,is urgent for understanding the factors that impact the hydrogen evolution reaction(HER)catalytic ***,ultrathin WS2 nanosheets with precise quantitative single atomic S-vacancy on the inert basal plane were flexible prepared through hydrogen peroxide etching *** as-synthesized single atomic S-vacancy defect WS2(SVD-WS2)nanoflake with the activated basal plane exhibited an impressive overpotential of 137 mV at a current density of 10 mA·cm^(-2) and a Tafel slope of 53.9 mV dec^(-1).Furthermore,anchoring on the defect graphene matrix,the assembled two-dimensional(2D)stacking heterojunction exhibits further enhanced HER catalytic activity(an overpotential of 108 mV vs.10 mA·cm^(-2) and a Tafel slope of 48.3 mV·dec^(-1))and stability(〜10%decline after 9,000 cycles),which attributed to the electronic structure modulation from the synergetic interactions between SVD-WS_(2) and defect *** finding provides a smart defects introduce strategy to trigger high-efficiency hydrogen evolution over WS_(2) nanosheets and a general 2D heterojunctions fabricated inspiration based on strong interaction interface.

关键词： S-vacancies defect graphene hydrogen evolution reaction heterojunctions

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Symmetry energy of strange quark matter and tidal deformability of strange quark stars

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Nuclear Science and Techniques 2022年第11期33卷 89-100页

作者： Jian-Feng Xu Cheng-Jun Xia Zhen-Yan Lu Guang-Xiong Peng Ya-Peng Zhao College of Information Engineering Suqian UniversitySuqian 223800China School of Physics and Electrical Engineering AnYang Normal UniversityAnyang 455000China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and ElectronicsHunan University of Science and TechnologyXiangtan 411201China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Institute of High-Energy Physics Chinese Academy of SciencesBeijing 100049China School of Mathematics and Physics Henan Urban Construction UniversityPingdingshan 467036China

Research performed during the past decade revealed an important role of symmetry energy in the equation of state(EOS)of strange quark matter(SQM).By introducing an isospin-dependent term into the quark mass scaling,the SQM stability window in the equivparticle model was *** results show that a sufficiently strong isospin dependence C_(I)can significantly widen the SQM region of absolute stability,yielding results that simultaneously satisfy the constraints of the astrophysical observations of PSR J1614-2230 with 1.928±0.017 Mand tidal deformability 70≤Λ_(1:4)≤580 measured in the event *** increasing C_(I),the difference between the u,d,and s quark fractions for the SQM inβ-equilibrium becomes inconspicuous for C>0,leading to small isospin asymmetryδ,and further resulting in similar EOS and structures of strange quark stars(SQSs).Moreover,unlike the behavior of the maximum mass of ud QSs,which varies with C_(I)depending on the sign of the parameter C,the maximum mass of the SQSs decreases monotonously with increasing CI.

关键词： Symmetry energy Strange quark matter Strange stars Tidal deformability

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基于摩擦伏特效应的超滑表征技术

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Science Bulletin 2024年第9期69卷 1197-1201页

作者：王昭政高凯冯源曹杰宫礼坤范贝贝张毅解国新张弛 CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China School of Electrical&Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang 212013China Institute of New Materials and Advanced Manufacturing Beijing Academy of Science and TechnologyBeijing 100084China

Friction occurs in our daily lives, and statistics have shown that it consumes approximately 1/3 of the primary energy. In addition,mechanical interface friction significantly impacts the efficiency,noise, accuracy, corrosion, reliability, and operational lifespans of equipment. Several studies have revealed various methods for reducing the coefficient of friction (COF) to the superlubricity state(COF <0.01) through efficient lubrication technology.

关键词： friction corrosion energy.

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A Web-Based Campus Navigation System with Mobile Augmented Reality Intervention

A Web-Based Campus Navigation System with Mobile Augmented R...

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2021 Asian Conference on Intelligent Computing and Data Sciences, ACIDS 2021

作者： Nordin, Noradila Markom, Marni Azira Suhaimi, Farhana Aqilah Ishak, Syaimaa' School of Computing Universiti Utara Malaysia SintokKedah06010 Malaysia Advanced Sensor Technology Center of Excellence Universiti Malaysia Perlis Kampus Pauh Putra Perlis Arau02600 Malaysia

In this era of information technology, the introduction of new and greatly improved technologies is becoming vital especially with the progressive development of computing power to fulfill current technological needs. Augmented Reality (AR) is a part of the emerging technologies that are gaining great attention and interest with new and better innovations being developed. AR is an immersive technology where it complements real-world objects together with computer-generated objects to give more details and meaning to the objects in the real world. AR has been successfully growing nowadays in many industries, mainly in gaming and entertainment, education and navigation. However, AR has not been standardized and to be widely used in navigation systems even though there are many applications developed for this purpose. This paper proposed a web-based AR-UUM Campus Navigation System using ARToolKit, that is accessible via mobile devices that uses AR to overlay the information as images of the searched location on campus, especially for indoor navigations for lecture halls, tutorial rooms, laboratories, and offices which rarely are covered by the normal maps. Based on the respondents' evaluation, they managed to successfully interact with the AR-UUM Campus Navigation System, however, some improvements are required in terms of the functions expected from the system. Nevertheless, the use of AR in a navigation system shows promising results and has the potential to be widely used due to high interest in augmented reality. © Published under licence by IOP Publishing Ltd.

关键词： Augmented reality

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强健超弹的蜘蛛网状聚酰亚胺纤维基导电复合气凝胶用于极端温度下的线性压力传感器

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Science China Materials 2023年第7期66卷 2829-2842页

作者：杨文科刘虎杜厚义张旻悦王春枫尹锐潘曹峰刘春太申长雨 Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China China Astronaut Research and Training Center Beijing 100094China

压力传感器是人工触觉感应的基石.尽管人们对高性能压力传感器进行了广泛的研究,但解决传感器的高灵敏度、宽线性响应范围和宽工作温度范围仍然面临巨大挑战.在此,我们创新性地应用三乙胺实现了疏水聚酰亚胺纤维(PIFs)在碳纳米管(CNT)... 详细信息

压力传感器是人工触觉感应的基石.尽管人们对高性能压力传感器进行了广泛的研究,但解决传感器的高灵敏度、宽线性响应范围和宽工作温度范围仍然面临巨大挑战.在此,我们创新性地应用三乙胺实现了疏水聚酰亚胺纤维(PIFs)在碳纳米管(CNT)水溶液中的均匀分散,同时纤维的结构不会受到破坏,并利用冻干和热酰亚胺化技术制备了强健超弹的蜘蛛网状(PIF/CNT)导电复合气凝胶.该气凝胶作为压力传感器具有宽线性感应范围(0.01-53.34 kPa)、超低检测限(10 Pa)、高灵敏度(0.507 kPa^(-1))、快速响应/恢复时间(85/80 ms)、稳定的快速压缩响应(500 mm min^(-1))和优异的抗循环疲劳能力(5000次)等优异的传感性能.有限元分析表明,多级纤维网络有利于相邻的导电纤维之间的接触面积在外部压力下有明显的线性变化,使之表现出优异的线性传感性能.该传感器可用于人体生理和运动信号检测、电子皮肤和智能控制,且在极端温度(-100-300℃)下表现出出色的传感稳定性和热绝缘性,可用于极端太空环境下太空服和月球/火星栖息地充气结构的传感单元.本工作为开发下一代线性压力传感器提供了一个简单有效的方法.

关键词： polyimide fibre superelastic aerogel pressure sensor linear sensing environmental tolerance

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MXene based mechanically and electrically enhanced film for triboelectric nanogenerator

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Nano Research 2021年第12期14卷 4833-4840页

作者： Yuyu Gao Guoxu Liu Tianzhao Bu Yaoyao Liu Youchao Qi Yanting Xie Shaohang Xu Weili Deng Weiqing Yang Chi Zhang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing101400China Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning530004China

The development of triboelectric nanogenerator(TENG)technology which can directly convert ambient mechanical energy into electric energy may affect areas from green energy harvesting to emerging wearing ***,the material of triboelectric layer is critical to the mechanical robustness and electrical output characteristics of the ***,a MXene enhanced electret polytetrafluoroethylene(PTFE)film with a high mechanical property and surface charge density is *** MXene/PTFE composite film was synthesized by spraying and annealing *** the doping of MXene,the crystallinity of composite film could be tuned,leading to an enhancement in the tensile property of 450%and reducing the wear volume about 80%in the friction ***,the as-fabricated TENG with this composite film outputs 397 V of open-circuit voltage,21µA of short-circuit current,and 232 nC of transfer charge quantity,which are 4,6,and 6 times higher than that of the TENG made by pure PTFE film,***,this work provides a creative strategy to simultaneously improve the mechanical property and electrical performance of the TENGs,which have great potential in improving device stability under a complex mechanical environment.

关键词： MXene polytetrafluoroethylene(PTFE) mechanically and electrically enhanced triboelectric layer triboelectric nanogenerator

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Experimental demonstration of a flexible-grid 1×(2×3)mode-and wavelength-selective switch using silicon microring resonators and counter-tapered couplers

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Chinese Optics Letters 2024年第1期22卷 52-58页

作者：孔德军鲁昊汪鹏君符强戴世勋陈伟伟王栎沣张波豪马凌霄李军戴庭舸杨建义 Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035China College of Science and Technology Ningbo UniversityNingbo 315300China Laboratory of Infrared Materials and Devices The Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Department of Information Science and Electronics Engineering and Cyrus Tang Center for Sensor Materials and Applications Zhejiang UniversityHangzhou 310027China

A flexible-grid 1×(2×3)mode-and wavelength-selective switch which comprises counter-tapered couplers and silicon microring resonators has been proposed,optimized,and demonstrated experimentally in this *** carefully thermally tuning phase shifters and silicon microring resonators,mode and wavelength signals can be independently and flexibly conveyed to any one of the output ports,and different bandwidths can be generated as *** particle swarm optimization algorithm and finite difference time-domain method are employed to optimize structural parameters of the twomode(de)multiplexer and crossing *** bandwidth-tunable wavelength-selective optical router composed of12 microring resonators is studied by taking advantage of the transfer matrix *** results show that,for the fabricated module,cross talk less than-10.18 dB,an extinction ratio larger than 17.41 d B,an in-band ripple lower than0.79 dB,and a 3-dB bandwidth changing from 0.38 to 1.05 nm are obtained,as the wavelength-channel spacing is 0.40 *** corresponding response time is measured to be 13.64μs.

关键词： integrated optics optical waveguide mode-and wavelength-selective switch

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Performance-enhanced and cost-effective triboelectric nanogenerator based on stretchable electrode for wearable SpO2 monitoring

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Nano Research 2022年第3期15卷 2465-2471页

作者： Huamin Chen Wei Yang Cheng Zhang Mingqiang Wu Wenjie Li Yuxiao Zou Longfeng Lv Hualiang Yu Huizhen Ke Ruping Liu Yun Xu Jun Wang Zhou Li Fujian Key Laboratory of Functional Marine Sensing Materials Center for Advanced Marine Materials and Smart SensorsMinjiang UniversityFuzhou 350108China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Beijing Key Laboratory of Inorganic Stretchable and Flexible Information Technology Beijing 100083China Beijing Institute of Graphic Communication Beijing 102600China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Fujian Key Laboratory of Novel Functional Textile Fibers and Materials Minjiang UniversityFuzhou 350108China

Recently,stretchable and wearable health monitoring equipment has greatly improved human’s daily life,which sets higher demands for portable power source in stretchability,sustainability,and *** this work,we proposed a stretchable triboelectric nanogenerator(TENG)based on stretchable poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/porous carbon hybrid for oxyhemoglobin saturation(SpO2)*** combine advantages of carbon material for its high conductivity and organic electrode for its high stretchability,we spin-coated a solution of PEDOT:PSS/porous carbon onto a plasma-treated pre-stretched Ecoflex film to fabricate a stretchable electrode with rough *** to its roughness and high potential difference with the dielectric material,the stretchable-electrode-based TENG exhibited better performance compared to the pristine TENG based on carbon or PEDOT:PSS *** output voltage and current reached up to 51.5 V and 13.2μA as the carbon concentration *** importantly,the performance further increased under large strain(100%)which is suitable for wearable ***,the device demonstrated its application potential for powering a flexible blood oxygen *** simple and cost-effective method can enhance the stretchability and stability of organic/inorganic electrode-based TENG,which paves the development of high-performance stretchable TENG.

关键词： triboelectric nanogenerator stretchable porous carbon blood oxygen poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) wearable electronic

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A Methodology for Verifying and Validating the Functional Performance Evaluation of High-Fidelity RADAR sensor Models at Raw Data and Detection Levels

A Methodology for Verifying and Validating the Functional Pe...

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International Conference on Vision, Image and Signal Processing (ICVISP)

作者： Arsalan Haider Lukas Haas Abduelkadir Eryildirim Thomas Zeh Shotaro Koyama Nils Henning Müllner Martin Jakobi Alexander W. Koch IFM-Institute for Driving Assistance and Connected Mobility Kempten University of Applied Sciences Germany Institute for Measurement Systems and Sensor Technology Technical University of Munich Germany Infineon Technologies Austria AG Advanced Vehicle Research Institute Kanagawa Institute of Technology Japan Institute of Transportation Systems German Aerospace Center DLR Germany

ISBN: (数字)9798331541460

ISBN: (纸本)9798331541477

This paper outlines a comprehensive methodology for verifying and validating the functional performance evaluation of high-fidelity radio detection and ranging (RADAR) sensor models at both the raw data level, specifically the range map (RM) and range-Doppler map (RDM), and the detection level. Three key performance parameters (KPPs) are defined at the raw data level: the target's received power, signal-to-noise ratio (SNR), and twoway beam pattern. Four KPPs are identified at the detection level: distance, relative radial velocity, azimuth angle, and elevation angle. This study also introduces three dynamic test scenarios directly applicable to the functional evaluation assessment of RADAR sensor models. Furthermore, a toolchain is presented to integrate real-world test scenarios into the virtual environment, allowing for frame-by-frame validation of the RADAR sensor models' functional evaluation. Quantitative analysis successfully assesses differences between simulations and real measurements, employing the mean absolute percentage error (MAPE) metric. This methodology has been successfully applied to a high-fidelity RADAR sensor model featuring a multiple input and multiple output (MIMO) 2D linear spacing virtual antenna and a complete signal processing toolchain that mimics real RADAR sensors. Results show a strong correlation between the simulation and real measurements, with MAPE values below 7 % for all defined KPPs at raw data and detection levels. Using this methodology, developers can assess whether virtual RADAR sensors are ready for environmental perception during scenario-based automated driving system (ADS) testing.

关键词： Performance evaluation Correlation Radar detection Radar Radar antennas Data models Radar signal processing Distance measurement Signal to noise ratio Testing

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