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Journal of Materiomics 2021年第1期7卷 89-97页

作者： Muath M.Al Malki Xun Shi Pengfei Qiu G.Jeffrey Snyder David C.Dunand department of Materials Science&engineering Northwestern UniversityEvanstonIL60208USA Mechanical engineering department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China

Upon uniaxial compressive loading at 500℃(T/Tm=0.67,where Tm is the absolute melting point),the n-type Skutterudite alloy Yb03Co4Sb12 deforms plastically by creep via a power-law,with a stress exponent~3 consistent with dislocation viscous *** activation energy of 171 kJ/mol is measured over the temperature range of 500-587℃(T/Tm=0.67-0.75)at a stress of 30 ***_(0.3)Co_(4)Sb_(12)is ductile at 500℃,exhibiting a compressive strain of 25%when subjected to stresses ranging from 22 to 90 MPa for up to 28 *** the thermoelectric materials tested so far for creep,Yb_(0.3)Co_(4)Sb_(12)exhibits a creep resistance intermediate between low-melting(Bi2Te3,TAGS-85)and high-melting thermoelectrics(Mg2Si and ZrNiSn).A relatively modest drop in the figure of merit zT,from 0.67 to 0.52,is displayed by Yb_(0.3)Co_(4)Sb_(12)after accumulating 3.7%compressive creep strain at 500℃,mostly due to a drop in electrical conductivity.

关键词： Filled Skutterudite CoSb_(3) Seebeck coefficient electrical conductivity Creep

Development of a Lightning Warning System

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Journal of energy and power engineering 2012年第2期6卷 287-292页

作者： Gyung-Suk Kil Dae-Won Park Kwang-Seok Jung Chang-Hwan Ahn Division of electrical and Electronics engineering National Korea Maritime University Busan 606-791 Korea department of Digital Electronics ＆ Information Inha Technical College Incheon 402-752 Korea

A lightning warning system （LWS） which can predict the possibility of lightning strike and the position of lightning discharge was developed. The LWS uses the electric field intensity at the ground as a parameter to warn the possibility of lightning strikes. A planar shutter type electric field mill （EFM） with a rotating vane is studied to measure the electric field. From a calibration experiment, the sensitivity of the EFM was adjusted to 0.15 V/kV/m, and this covers the ranges from 200 V/m to 20 kV/m. Magnetic field waveform is detected by a crossed loop coil and an integral amplifier. Frequency bandwidth of the circuit ranges from 5 kHz to 1.2 MHz. The polarity of lightning discharges is discriminated by electric field component. After fixing the polarity, we can calculate the direction and distance of lightning discharge by the peak and the zero cross time of the detected magnetic field waveform.

关键词： Lightning warning system (LWS) electric field mill (EFM) thundercloud lightning discharge electromagnetic field loop coil.

High-Performance Magnetic-core Coils for Targeted Rodent Brain Stimulations

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Biomedical engineering Frontiers 2022年第1期3卷 82-92页

作者： Hedyeh Bagherzadeh Qinglei Meng Hanbing Lu Elliott Hong Yihong Yang Fow-Sen Choa department of Computer Science and electrical engineering University of MarylandBaltimore CountyBaltimoreMD 21250USA Neuroimaging Research Branch National Institute on Drug AbuseNational Institutes of HealthBaltimoreMD 21224USA Maryland Psychiatric Research center Department of PsychiatryUniversity of Maryland School of MedicineBaltimoreMD 21201USA

Objective and Impact *** is a need to develop rodent coils capable of targeted brain stimulation for treating neuropsychiatric disorders and understanding brain *** describe a novel rodent coil design to improve the focality for targeted stimulations in small rodent *** magnetic stimulation(TMS)is becoming increasingly important for treating neuropsychiatric disorders and understanding brain *** studies permit invasive manipulations and are essential for the mechanistic understanding of TMS effects and explorations of therapeutic outcomes in disease ***,existing TMS tools lack focality for targeted ***,there has been limited fundamental research on developing coils capable of focal stimulation at deep brain regions on small animals like *** this study,ferromagnetic cores are added to a novel angle-tuned coil design to enhance the coil performance regarding penetration depth and *** simulations and experimental electric field measurements were conducted to optimize the coil *** proposed coil system demonstrated a significantly smaller stimulation spot size and enhanced electric field decay rate in comparison to existing *** the ferromagnetic core reduces the energy requirements up to 60%for rodent brain *** simulated results are validated with experimental measurements and demonstration of suprathreshold rodent limb excitation through targeted motor cortex *** newly developed coils are suitable tools for focal stimulations of the rodent brain due to their smaller stimulation spot size and improved electric field decay rate.

关键词： stimulation manipulation becoming

Capacity Predictions for LFP-based Battery Electrode Formulation:A Data-Driven Approach

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Capacity Predictions for LFP-based Battery Electrode Formula...

Emerging design principles,materials,and applications for moisture-enabled electric generation

第21届中国系统仿真技术及其应用学术年会

作者： Liu Kailong Tang Xiaopeng Zhang Yeshui Li Weihan WMG University of Warwick department of Chemical and Biological engineering The Hong Kong University of Science and Technology Guangzhou HKUST Fok Ying Tung Research Institute department of Chemical engineering University College London Faculty of electrical engineering and Information Technology RWTH Aachen University

Lithium-ion battery has become one popular power source in transportation electrification applications such as electric vehicles and hybrid electric *** energy conversion within the battery significantly relies on the properties of the electrode made of some material components interacting with one *** to the complicated process of electrode manufacturing,a reliable system simulation solution that could predict the manufactured battery electrode properties and quantify the importance weights of component variables of interest is crucial for the battery electrode *** present article scrutinizes the sensitivity analysis of material components on the capacities of LiFePO(LFP)-based battery electrode formulation via the regression *** be specific,a neighborhood component analysis-based data-driven approach is designed to well quantify the importance weights of five interested material component variables and effectively predict the resulted half-cell’s *** results reveal that the proposed approach is able to accurately capture the underlying mappings between material components and three different capacities under 25/C,5 C,and 15 C ***,the most important component variables can be effectively discovered for model *** to the merits in terms of accuracy and generalization,the designed data-driven approach can not only conduct reliable capacity predictions but also guide the monitoring and optimization of material components for better battery electrode production.

关键词： Capacity prediction System modeling and simulation Data-driven approach Battery electrode production

来源： cnki会议评论

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eScience 2022年第1期2卷 32-46页

作者： Zhaoyang Sun Xian Wen Liming Wang Dongxiao Ji Xiaohong Qin Jianyong Yu Seeram Ramakrishna Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai201620China department of Mechanical engineering National University of Singapore117574Singapore Innovation center for Textile Science and Technology Donghua UniversityShanghai201620China

Smart generators that collect energy from the ambient environment are a new approach for meeting growing global energy *** is one of the most abundant resources in the ambient environment,and using it to generate electricity has aroused great interest in recent *** this review,we first summarize the emerging design principles of moisture power generation,including ion diffusion,streaming potential,and charged surface ***,based on these fundamental principles,we systematically summarize the materials thus far known to be suitable for moisture power ***,we highlight the application of moisture energy generators in various fields,such as thermoelectricity,solar thermal evaporation,capacitors,strain sensors,and information storage,and discuss current challenges and future prospects for the development of moisture energy generators.

关键词： energy conversion Moisture-enabled electric generator Ion diffusion Streaming potential Smart generator

Regulating local electric field to optimize the energy storage performance of antiferroelectric ceramics via a composite strategy

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Journal of Advanced Ceramics 2023年第3期12卷 598-611页

作者： Ying Yang Zhanming Dou Kailun Zou Kanghua Li Wei Luo Wen Dong Guangzu Zhang Qiuyun Fu Shenglin Jiang School of Optical and Electronic Information Engineering Research Center for Functional Ceramics MOE and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China China Zhenhua Group Yunke Electmnics Co. Ltd.Guiyang 550018China

Electrostatic energy storage technology based on dielectrics is the basis of advanced electronics and high-power electrical *** polarization(P)and high electric breakdown strength(Eb)are the key parameters for dielectric materials to achieve superior energy storage *** this work,a composite strategy based on antiferroelectric dielectrics(AFEs)has been proposed to improve the energy storage ***,AlN is selected as the second phase for the(Pb_(0.915)Ba_(0.04)La_(0.03))(Zr_(0.65)Sn_(0.3)Ti_(0.05))O_(3)(PBLZST)AFEs,which is embedded in the grain boundaries to construct insulating networks and regulate the local electric field,improving the ***,it is emphasized that AFEs have the AFE–FE and FE–AFE phase transitions,and the increase of the phase transition electric fields can further improve the recoverable energy density(Wrec).As a result,the Eb increases from 180 to 290 kV·cm−1 with a simultaneous increase of the phase transition electric fields,magnifying the Wrec to~144%of the pristine *** mechanism for enhanced Eb and the phase transition electric fields is revealed by the finite element simulation ***,the PBLZST:1.0 wt%AlN composite ceramics exhibit favorable temperature stability,frequency stability,and charge–discharge ability,making the composite ceramics a promising candidate for energy storage applications.

关键词： energy storage antiferroelectric composites local electric field electric breakdown strength

A Study of Nano Materials and Their Reactions in Liquid Using in situ Wet Cell TEM Technology

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Chinese Journal of Chemistry 2012年第12期30卷 2839-2843页

作者： Chen Xin Zhou Lihui Wang Ping Zhao Chongjun Miao Xiaoli Key Laboratory for Ultrafine Materials of Min&try of Education and Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China department of Materials Science andengineering University of Illinois at Urbana-Champaign Urbana IL 61801 USA East China University of Science and Technology Shanghai 200237 China State Key Laboratory of Bioreactor engineering Biomedical Nanotechnology Center East China University of Science and Technology Shanghai 200237 China

Several nano material and reaction systems were in situ monitored with an electrochemical TEM wet cell set up. In a 1 g/L sliver particle aqueous solution, the particles were observed to be ca. 10 nm sized, in both discrete particle and nano cluster forms. The silver particles were attached to the 50 nm-thick Si3N4 windows of the wet cell and could not move freely in the liquid. With a SIC14 liquid loaded in the wet cell, silicon nano materials were controllably grown on the wet cell windows by means of a liquid phase electron beam induced deposition （EBID） method. The deposited nano dots were nicely round-shaped, and demonstrated a power law growth dependency on beam exposure time in a log-log plot. In a NiCI2 solution/Ni system, both electrochemical deposition and dissolution of the nickel nano films were observed while applying electric biases on to the nickel electrodes in the wet cell. Instead of extensional growth on existing crystals, interestingly, it is more commonly observed that new nickel nano particles grow out in front of the existing film first and then merged into the film. The wet cell set up is demonstrated to be a versatile tool for nano liquid system research.

关键词： in situ TEM nano material electrochemical reaction electron beam induced deposition semiconductor

Design and Description of a Photovoltaic Pumping System： Application in the Site of Adrar

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Journal of Environmental Science and engineering(B) 2012年第2期1卷 183-186页

作者： Ahmed Mehdaoui Amar Hadj Arab Djaafar Seminar Research Unit for Renewable Energies in the Saharan Medium Photovoltaic Conversion Department Route de Reggane AdrarOlO00 Algeria Development center for Renewable Energies Department of Photovoltaic Solar Energy Route de l＇observatoire Bouzar~ahAlgiers 16340 Algeria department of Mechanial engineering Saad Dahlab University Route de Soumaa Blida 09000 Algeria

The Saharan areas and in particular the isolated sites are characterized by low levels of population, in dispersed cores, which suffer from serious problems of water supply for consumption and the irrigation. The photovoltaic pumping systems （PV） are an ideal solution for these problems. Despite the presence of several photovoltaic pumping systems （PVPS） projects, data acquisition system is still missing in most cases. In this work, the authors will present the PVPS installed at the unit of research in renewable energies in Saharan medium （URERMS, Algeria）. This system will enable us to better analyze the performances ofa photovoltaic pumping system in Saharan medium. The principal elements of the chain of the photovoltaic pumping system are： a photovoltaic generator, the power conditioning system, a motor-driven pump immersed group, an electric wiring, a hydraulic infrastructure which comprises a water tank.

关键词： Photovoltaic pumping dimensioning optimization system of irrigation performances.

A biosensing system employing nanowell microelectrode arrays to record the intracellular potential of a single cardiomyocyte

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Microsystems & Nanoengineering 2022年第3期8卷 185-198页

作者： Yuting Xiang Haitao Liu Wenjian Yang Zhongyuan xu Yue Wu Zhajian Tang Zhjing Zhu Zhiyong Zeng Depeng Wang Tianxing Wang Ning Hu Diming Zhang department of Obstetrics and Gynecology Affiliated Dongguan People's HospitalSouthern Medical UniversityDongguan 523058China Research center for Inelligent Sensing Systems Zhejiang LaboratoryHangzhou 311100China Research center for Humanoid Sensing Zhejiang LaboratoryHangzhou 311100China Key Laboratory of Novel Target and Drug Study for Neural Repair of Zhejiang Province School of MedicineSchool of Computer&Computing ScienceZhejiang University City CollegeHangzhou 310015China School of Brain Science and Brain Medicine Zhejiang UniversityHangzhou 310058China School of Automation Nanjing University of Science and TechnologyNanjing 210094China College of energy and power engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China E-Link Care Meditech Co. LtdHangzhou 310011China ZJU-Hangzhou Global Scientific and Technological Innovation center Department of ChemitryZhejiang UniversityHangzhou 310058China

Electrophysiological recording is a widely used method to investigate cardiovascular pathology,pharmacology and developmental *** arrays record the electrical potential of cells in a minimally invasive and highthroughput ***,commonly used microelectrode arays primarily employ planar microelectrodes and cannot work in applications that require a recording of the intracellular action potential of a single *** this study,we proposed a novel measuring method that is able to record the intracellular action potential of a single cardiomyocyte by using a nanowell patterned microelectrode array(NWMEA).The NWMEA consists of five nanoscale wells at the center of each circular planar *** pulse electroporation was applied to the NWMEA to penetrate the cardiomyocyte membrane,and the intracellular action potential was continuously *** intracellular potential recording of cardiomyocytes by the NWMEA measured a potential signal with a higher quality(213.76±25.85%),reduced noise root-mean-square(~33%),and higher signal-to-noise ratio(254.36±12.61%)when compared to those of the extracellular *** to previously reported nanopillar microelectrodes,the NWMEA could ensure single cell electroporation and acquire high-quality action potential of cardiomyocytes with reduced fabrication *** NWMEA-based biosensing system is a promising tool to record the intracellular action potential of a single cell to broaden the usage of microelectrode arrays in electrophysiological investigation.

关键词： arrays potential record