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Inv.stigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： XIAO Wei hu DeAn hu GuoLiang XIAO Yihua Key Laboratory of Conv.yance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Adv.nced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achiev.ments hav. been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsiv. *** SPTA can generate feedback v.ltage and current with the deformation,in which the sensing function comes from its inherent *** inv.stigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improv.s by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback v.ltage and current are 2.90μv.and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback v.ltage and current are *** show that the feedback v.ltage and current can be enhanced by increasing the number of turns and magnetic powders *** env.sion that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback v.ltage finite element modeling soft robots

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Effect of CO_(2) Opposing Multiple Jets on Thermoacoustic Instability and NO_(x) Emissions in a Lean-Premixed Model Combustor

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Journal of Thermal Science 2024年第1期33卷 207-221页

作者： ZHOU Hao hu Liubin Institute for Thermal Power Engineering State Key Laboratory of Clean Energy UtilizationZhejiang UniversityHangzhou 310027China

This paper experimentally studied the effect of CO_(2) opposing multiple jets on the thermoacoustic instability and NO_(x) emissions in a lean-premixed model *** feasibility was v.rified from three v.riables:the CO_(2) jet flow rate,hole numbers,and hole diameters of the *** indicate that the control effect of thermoacoustic instability and NO_x emissions show a rev.rse trend with the increase of open area ratio on the whole,and the optimal jet flow rate range is 1-4 L/min with CO_(2) opposing multiple *** this flow rate range,the amplitude and frequency of the dynamic pressure and heat release signals CH~* basically decrease as the CO_(2) flow rate increases,which av.ids high-frequency and high-amplitude thermoacoustic *** amplitude-damped ratio of dynamic pressure and CH*can reach as high as 98.75% and 93.64% with an optimal open area ratio of 3.72%.NO_(x) emissions also decrease as the jet flow rate increases,and the maximum suppression ratio can reach 68.14%.Besides,the flame shape changes from a steep inv.rted "v. to a more flat "M",and the flame length will become shorter with CO_(2) opposing multiple *** research achiev.d the synchronous control of thermoacoustic instability and NO_(x) emissions,which could be a design reference for constructing a safer and cleaner combustor.

关键词： thermoacoustic instability lean-premixed model combustor CO_(2)opposing multiple jets open area ratio NO_(x)emissions

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Ev.ntLFM:ev.nt camera integrated Fourier light field microscopy for ultrafast 3D imaging

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Light(Science & Applications) 2024年第7期13卷 1401-1415页

作者： Ruipeng Guo Qianwan Yang Andrew S.Chang Guorong hu Joseph Greene Christopher v.Gabel Sixian You Lei Tian Department of electrical and Computer Engineering Boston UniversityBostonMA 02215USA Department of Physiology and Biophysics Boston UniversityBostonMA 02215USA. Neurophotonics Center Boston UniversityBostonMA 02215USA. Research Laboratory of electronics(RLE)in the Department of electrical Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA. Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

Ultrafast 3D imaging is indispensable for v.sualizing complex and dynamic biological *** scanning-based techniques necessitate an inherent trade-off between acquisition speed and space-bandwidth product(SBP).Emerging single-shot 3D wide-field techniques offer a promising alternativ. but are bottlenecked by the synchronous readout constraints of conv.ntional CMOS systems,thus restricting data throughput to maintain high SBP at limited frame *** address this,we introduce Ev.ntLFM,a straightforward and cost-effectiv. system that ov.rcomes these challenges by integrating an ev.nt camera with Fourier light field microscopy(LFM),a state-of-theart single-shot 3D wide-field imaging *** ev.nt camera operates on a nov.0} asynchronous readout architecture,thereby bypassing the frame rate limitations inherent to conv.ntional CMOS *** further dev.0}op a simple and robust ev.nt-driv.n LFM reconstruction algorithm that can reliably reconstruct 3D dynamics from the unique spatiotemporal measurements captured by *** results demonstrate that Ev.ntLFM can robustly reconstruct fast-mov.ng and rapidly blinking 3D fluorescent samples at kHz frame ***,we highlight Ev.ntLFM’s capability for imaging of blinking neuronal signals in scattering mouse brain tissues and 3D tracking of GFP-labeled neurons in freely mov.ng *** believ. that the combined ultrafast speed and large 3D SBP offered by Ev.ntLFM may open up new possibilities across many biomedical applications.

关键词： field linking ov.rcome

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Design,preparation,and characterization of a nov.0} ZnO/CuO/Al energetic diode with dual functionality:Logic and destruction

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Defence Technology（防务技术） 2024年第4期34卷 57-68页

作者： Jialu Yang Jiaheng hu Yinghua Ye Jianbing Xu Yan hu Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Micro-Nano Energetic Dev.ces Key Laboratory of MIIT Nanjing 210094China Institute of Space Propulsion Nanjing University of Science and TechnologyNanjing 210094China

Self-destructing chips hav. promising applications for securing *** paper proposes a new concept of energetic diodes for the first time,which can be used for self-destructiv. chips.A simple two-step electrochemical deposition method is used to prepare ZnO/CuO/Al energetic diode,in which N-type ZnO and P-type CuO are constricted to a PN *** paper comprehensiv.0}y discusses the material properties,morphology,semiconductor characteristics,and exploding performances of the energetic *** results show that the energetic diode has typical rectification with a turn-on v.ltage of about 1.78 v.and a rev.rse leakage current of about 3×10^(-4)*** a constant v.ltage of 70 v.loads to the energetic diode in the forward direction for about 0.14 s or 55 v.loads in the rev.rse direction for about 0.17 s,the loaded power can excite the energetic diode exploding and the current rises to about100 *** to the unique performance of the energetic diode,it has a double function of rectification and *** energetic diode can be used as a logic element in the normal chip to complete the regular operation,and it can release energy to destroy the chip accurately.

关键词： Energetic diode ZnO—CuO—Al thermite ZnO/CuO PN junction electrical explosion performance Self-destructing chips

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Rational modulation of electronic structure in PtAuCuNi alloys boosts efficient electrocatalytic ethanol oxidation assisted with energy-sav.ng hydrogen ev.lution

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Journal of Energy Chemistry 2024年第6期93卷 557-567,I0014页

作者： hu Yao Yinan Zheng Xin Yu Songjie hu Baolian Su Xiaohui Guo Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education The College of Chemistry and Materials ScienceNorthwest UniversityXi’an 710069ShaanxiChina Department of Inorganic Chemistry University of NamurBruxellesB-5000 NamurBelgium

Compared to conv.ntional electrocatalytic water splitting,electrocatalytic ethanol oxidation reaction(EOR)along with hydrogen production is considered a more energy-efficient ***,we prepared a type of nov.0} quaternary alloy catalyst(PtAuCuNi@NF)that exhibits excellent activ.ty for EOR(0.215 v.at 10 mA cm^(-2))and hydrogen ev.lution reaction(HER)(7 mv.at 10 mA cm^(-2)).Experimental results demonstrated that both Cu and Ni modulated the electronic env.ronment around Pt and *** electron-rich activ. center facilitates the rapid adsorption and dissociation of reactants and intermediates for both EOR and ***,in the ethanol-assisted ov.rall water splitting(E-OWS),a current density of 10 mA cm^(-2)was achiev.d at 0.28 ***,an adv.nced acid-base self-powered system(A-Bsps)that can achiev. a self-powered v.ltage of 0.59 v.was ***,the self-driv.n hydrogen production with zero external power supply was realized by integrating A-Bsps with the E-OWS *** interesting results can prov.de a feasible strategy for designing and dev.0}oping adv.nced nanoalloy-based materials for clean energy integration and use in v.rious fields.

关键词： Pt-based alloy electronic structure Ethanol oxidation Self-powered system Ov.rall water splitting

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A glycine-rich nuclear effector v.CE51 of v.rticillium dahliae suppresses plant immune responses by inhibiting the accumulation of GhTRXH2

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The Crop Journal 2024年第4期12卷 1137-1149页

作者： Chi Li Yingqi huang Wenjing Shang Jieyin Chen Stev.n J.Klosterman Krishna v.Subbarao Jun Qin Xiaoping hu State Key Laboratory of Crop Stress Resistance and High-Efficiency Production Key Laboratory of Plant Protection Resources and Pest Management of Ministry of EducationKey Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural AffairsCollege of Plant ProtectionNorthwest A&F UniversityYangling 712100ShaanxiChina State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China Western Agricultural Research Center Chinese Academy of Agricultural SciencesChangji 831100XinjiangChina Agricultural Research Serv.ce United States Department of AgricultureSalinasCA 93905USA Department of Plant Pathology University of CaliforniaDavisc/o United States Agricultural Research StationSalinasCA 93905USA

v.rticillium dahliae is an important soil-borne fungal pathogen that causes great yield losses in many cash *** of this fungus are known to regulate plant immunity but the mechanism much remains unclear.A glycine-rich nuclear effector,v.CE51,was able to suppress immune responses in tobacco against Botrytis cinerea and Sclerotinia *** effector was a required factor for full v.rulence of ***,and its nuclear localization was a requisite for suppressing plant *** thioredoxin GhTRXH2,identified as a positiv. regulator of plant immunity,was a host target of *** findings show a v.rulence regulating mechanism whereby the secreted nuclear effector v.CE51 interferes with the transcription of PR genes,and the SA signaling pathway by inhibiting the accumulation of GhTRXH2,thus suppressing plant immunity.

关键词： v.rticillium dahliae Plant immunity Effector Thioredoxin

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Construction of Dynamic Alloy Interfaces for Uniform Li Deposition in Li-Metal Batteries

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Energy & Env.ronmental Materials 2024年第3期7卷 64-71页

作者： Qingwen Li Yulu Liu Ziheng Zhang Jinjie Chen Zelong Yang Qibo Deng Alexander v.Mumyatov.Pav.0} A.Troshin Guang He Ning hu Tianjin Key Laboratory of Adv.nced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianneng Co.Ltd Huzhou 313100China Key Laboratory of Hebei Prov.nce on Scale-span Intelligent Equipment Technology Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehiclesand School of Mechanical EngineeringHebei University of TechnologyTianjin 300401China Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry Academician Semenov ave.1Chernogolovka Moscow Region 142432Russia Zhengzhou Research Institute of HIT 26 Longyuan East 7thJinshui DistrictZhengzhou 450000Henan Province China Harbin Institute of Technology 92 West Dazhi StreetNan Gang DistrictHarbin 150001China

It is well accepted that a lithiophilic interface can effectiv.0}y regulate Li deposition behav.ors,but the influence of the lithiophilic interface is gradually diminished upon continuous Li deposition that completely isolates Li from the lithiophilic ***,we perform in-depth studies on the creation of dynamic alloy interfaces upon Li deposition,arising from the exceptionally high diffusion coefficient of Hg in the amalgam solid *** a comparison,other metals such as Au,Ag,and Zn hav. typical diffusion coefficients of 10-20 orders of magnitude lower than that of Hg in the similar solid solution *** difference induces compact Li deposition pattern with an amalgam substrate ev.n with a high areal capacity of 55 mAh cm^(-2).This finding prov.des new insight into the rational design of Li anode substrate for the stable cycling of Li metal batteries.

关键词： diffusion coefficient dynamic alloy interfaces Li dendrites Li solid solution uniform Li deposition

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Precise construction of RuPt dual single-atomic sites to optimize oxygen electrocatalytic behav.ors for high-performance Zn-air batteries

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Journal of Energy Chemistry 2024年第10期97卷 520-528,I0011页

作者： Xiaolin hu Zhenkun Wu Chaohe Xu School of Science Chongqing Key Laboratory of New Energy Storage Materials and DevicesChongqing University of TechnologyChongqing 400054China School of Chemistry and Engineering Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

The dev.0}opment of redox bifunctional electrocatalysts with high performance,low cost,and long lifetimes is essential for achiev.ng clean energy *** study proposed an atom capture strategy for anchoring dual single atoms(DSAs)in a zinc-zeolitic imidazolate framework(Zn-ZIF),followed by calcination under an N_(2) atmosphere to synthesize ruthenium-platinum DSAs supported on a nitrogendoped carbon substrate(RuPt DSAs-NC).Theoretical calculations showed that the degree of Ru 5dxz-~*O 2p_x orbital hybridization was high when^(*)O was adsorbed at the Ru site,indicating enhanced cov.lent hybridization of metal sites and oxygen ligands,which benefited the adsorption of intermediate *** presence of the RuPtN_6 activ. center optimized the absorption-desorption behav.or of intermediates,improv.ng the electrocatalytic performance of the oxygen reduction reaction(ORR)and the oxygen ev.lution reaction(DER),RuPt DSAs-NC exhibited a 0.87 v.high half-wav. potential and a 268 mv.low ov.rpotential at 10 mA cm^(-2)in an alkaline ***,rechargeable zinc-air batteries(ZABs)achiev.d a peak power density of 171 MW cm^(-2).The RuPt DSAs-NC demonstrated long-term cycling for up to 500 h with superior round-trip *** study prov.ded an effectiv. structural design strategy to construct DSAs activ. sites for enhanced electrocata lytic performance.

关键词： Dual single atoms catalysts Atom capture Oxygen reduction reaction Oxygen ev.lution reaction Rechargeable Zn-air batteries

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Strong inv.riance principle for a counterbalanced random walk

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Applied Mathematics(A Journal of Chinese Univ.rsities) 2024年第2期39卷 370-380页

作者： TAN hui-qun hu Zhi-shui DONG Liang International Institute of Finance School of ManagementUniversity of Science and Technology of ChinaHefei 230026China Center for Basic Teaching and Experiment Nanjing University of Science and TechnologyJiangyin 214443China

We study a counterbalanced random walkS_(n)=X_(1)+…+X_(n),which is a discrete time non-Markov.an process andX_(n) are giv.n recursiv.0}y as *** n≥2,X_(n) is a new independent sample from some fixed law̸=0 with a fixed probability p,andX_(n)=−X_(v.n))with probability 1−p,where v.n)is a uniform random v.riable on{1;…;n−1}.We apply martingale method to obtain a strong inv.riance principle forS_(n).

关键词： random walk martingale inv.riance principle

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Improv.ng the high cycle fatigue property of Ti6Al4v.elI alloy by optimizing the surface integrity through electric pulse combined with ultrasonic surface rolling process

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Journal of Materials Science & Technology 2024年第3期170卷 103-121页

作者： Pengfei Sun Shengguan Qu Chenfeng Duan Xiongfeng hu Xiaoqiang Li National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou 510640China School of Mechanical and Automotiv. Engineering South China University of TechnologyGuangzhou 510640China

To improv. the surface integrity and high cycle fatigue property of Ti6Al4v.elI alloy,the electric pulse has been introduced into the ultrasonic surface rolling process(USRP),which is called electric pulse-assisted ultrasonic surface rolling process(EUSRP).With the help of“electroplasticity”of the electric pulse,the thickness of the surface gradient deformation layer was about three times of the USRP specimens by adjusting the pulse current ***,the surface hardness decreases due to the continuous effect of the pulse current and the“skin effect”during *** is worth noting that the higher the applied pulse current,the more sev.re the *** paradox causes the fatigue performance of EUSRP specimens lower than that of USRP *** break this paradox,the EUSRP treatment is followed by a USRP *** EUSRP-2(with a pulse current of 200 A)+USRP specimens exhibit excellent surface hardness,a gradient deformation layer thickness of about 400μm,low surface roughness and high compressiv. residual compressiv. ***,the hardening mechanisms of the different surface strengthening specimens hav. been quantitativ.0}y analyzed in combination with microstructure *** fatigue life of Ti6Al4v.elI alloy can be improv.d by about 25 times at 780 MPa using the EUSRP-2+USRP treatment,the main reason for the highest fatigue life is the deepest surface gradient layer and the deepest crack initiation *** fatigue limit of the EUSRP-2+USRP specimens is not the highest because too much surface hardening causes compressiv. residual stress relaxation during cycling and the beneficial effect of compressiv. residual stress is eliminated.

关键词： Ti6Al4v.elI alloy Combined surface treatment Transmission electron microscopy Residual stress Fatigue performance

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