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Directional Three‑Dimensional Macroporous Carbon Foams Decorated with WC1−xNanoparticles Derived from Salting‑Out Protein Assemblies for Highly Effective Electromagnetic Absorption 认领 引用
1
作者 Yongzheng Chen Lixue Gai +5 位作者 Bo Hu Yan Wang Yanyi Chen Xijiang Han Ping Xu Yunchen Du 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第3期1-21,共21页
Directional three-dimensional carbon-based foams are emerging as highly attractive candidates for promising electromagnetic wave absorbing materials(EWAMs)thanks to their unique architecture,but their construction usu... Directional three-dimensional carbon-based foams are emerging as highly attractive candidates for promising electromagnetic wave absorbing materials(EWAMs)thanks to their unique architecture,but their construction usually involves complex procedures and extremely depends on unidirectional freezing technique.Herein,we propose a groundbreaking approach that leverages the assemblies of salting-out protein induced by ammonium metatungstate(AM)as the precursor,and then acquire directional three-dimensional carbon-based foams through simple pyrolysis.The electrostatic interaction between AM and protein ensures well dispersion of WC1−xnanoparticles on carbon frameworks.The content of WC1−xnanoparticles can be rationally regulated by AM dosage,and it also affects the electromagnetic(EM)properties of final carbon-based foams.The optimized foam exhibits exceptional EM absorption performance,achieving a remarkable minimum reflection loss of−72.0 dB and an effective absorption bandwidth of 6.3 GHz when EM wave propagates parallel to the directional pores.Such performance benefits from the synergistic effects of macroporous architecture and compositional design.Although there is a directional dependence of EM absorption,radar stealth simulation demonstrates that these foams can still promise considerable reduction in radar cross section with the change of incident angle.Moreover,COMSOL simulation further identifies their good performance in preventing EM interference among different electronic components. 展开更多
关键词 3D macroporous carbon-based foams Directional pore channels Salting-out protein assemblies EM wave absorption Directional dependence
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Enamel decussation pattern originates from directional sliding of ameloblasts 认领 引用
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作者 Vladislav Rakultsev Josef Lavicky +3 位作者 Marcos Gonzalez Lopez Klara Cigosova Igor Adameyko Jan Krivanek 《International Journal of Oral Science》 SCIE CAS CSCD 2026年第1期66-77,共12页
Enamel,the inorganic tissue covering the crowns of teeth,is known for its remarkable resilience and hardness.These properties originate from its high proportion of mineralized matrix and complex internal microarchitec... Enamel,the inorganic tissue covering the crowns of teeth,is known for its remarkable resilience and hardness.These properties originate from its high proportion of mineralized matrix and complex internal microarchitecture.On an ultrastructural level,it consists of directionally arranged enamel prisms.Continuously growing rodent incisors are an exemplary case of this phenomenon.Their enamel has a consistent decussation pattern,providing teeth with extremely high resistance and ensuring they remain constantly sharp.While the decussation pattern has been described in detail,mechanisms behind its formation have not been experimentally proven.Here,we show that the highly organized enamel micropattern is generated by directional epithelial sliding of enamel-forming ameloblasts in vivo.Our results detail how enamel micropatterning stems from individual cell cluster segregation and subsequent reciprocal interweaving.Based on this determination,we introduce and experimentally demonstrate a new model of enamel decussation pattern formation. 展开更多
关键词 rodent incisors inorganic tissue directionally arranged enamel prismscontinuously directional sliding microarchitecture mineralized matrix enamel decussation pattern ameloblasts
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Directional effects of blast waves on human thorax:Dynamic response and injury mechanisms 认领 引用
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作者 Meng Zhou Minzu Liang +4 位作者 Yuliang Lin Jiaqiang Wu Zizhen Qi Yuwu Zhang Rong Chen 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第7期173-185,共13页
Blast injury is a leading cause of military casualties,and the thorax,which houses the lungs and heart,is particularly vulnerable to blast waves.While previous studies have primarily examined anterior ex-posures,the m... Blast injury is a leading cause of military casualties,and the thorax,which houses the lungs and heart,is particularly vulnerable to blast waves.While previous studies have primarily examined anterior ex-posures,the mechanisms of thoracic response and organ injury under multi-directional blasts remain poorly understood.In this study,a validated human finite element model was employed to investigate the effects of blast wave incident direction on thoracic injury.Results indicate that interaction between blast and the thorax consistently involves reflection,diffraction,and convergence,with pressures on the loaded side dominating the overall response.Strong direction-dependent effects were observed in pressure transmission and energy distribution:under anterior loading,the heart experienced pressure amplitudes 4.2 times higher than the lungs due to density contrasts;under posterior loading,organ energy absorption decreased to 5.39%owing to chest wall constraints;and under lateral loading,impedance mismatch of the heart attenuated contralateral lung pressures by more than 90%.Lung in-juries were concentrated in the inferior lobes due to weak constraints of the lower thoracic cage,while asymmetry between left and right lung damage was attributed to organ arrangement and cage defor-mation.These findings elucidate the directional dependence of thoracic blast injury mechanisms,of-fering new insights for injury assessment and the design of protective equipment. 展开更多
关键词 Blast injury Dynamic response Human thorax Directional dependence
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Direct measurement of aerosol acidity:recent advances,challenges,and opportunities 认领 引用
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作者 Mingjin Tang Qishen Huang +5 位作者 Guangjie Zheng Shiguo Jia Shaojie Song Guohua Zhang Pingqing Fu Tong Zhu 《Science Bulletin》 SCIE EI CAS CSCD 2026年第12期3209-3220,共12页
Acidity is a critical property of atmospheric aerosols,dictating their behaviors and environmental,climatic,and health impacts.However,direct measurement of aerosol acidity remains a formidable challenge.This article ... Acidity is a critical property of atmospheric aerosols,dictating their behaviors and environmental,climatic,and health impacts.However,direct measurement of aerosol acidity remains a formidable challenge.This article reviews recent advances in direct measurement of aerosol acidity,critically assessing the strengths,limitations,and operational ranges of available methods,as well as their applications to laboratory and ambient aerosols.We also re-assess the widely used phase partitioning method,arguing that it shares fundamental principles with direct measurement methods.We further highlight key unresolved challenges in aerosol acidity measurement,and explore potential strategies for addressing them in future research.Ultimately,this work aims to foster further debates and inspire future advances in understanding aerosol acidity,and more broadly acidity within confined micro-and nanoscale spaces,which are ubiquitous in both natural and engineered systems. 展开更多
关键词 Aerosol acidity Direct measurement Micro-and nano-scale analysis Probe molecules Optical spectroscopy Non-ideality
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Direct numerical simulations of high-pressure impinging-jet atomization:Interfacial evolutions and spray characteristics 认领 引用
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作者 Bo WANG Erjun WU +4 位作者 Anlong YANG Feng ZHANG Baoe YANG Qingquan LIU Xiaodong CHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第3期158-174,共17页
This study presents a numerical investigation of impinging-jet atomization across various Weber numbers(We) under high backpressure conditions.Using the volume-of-fluid method,adaptive mesh refinement,and the iso Adve... This study presents a numerical investigation of impinging-jet atomization across various Weber numbers(We) under high backpressure conditions.Using the volume-of-fluid method,adaptive mesh refinement,and the iso Advector interface reconstruction technique,atomization characteristics are simulated and analyzed for different values of We.The results indicate that the geometry induces turbulent jets,which drive turbulent atomization through the shear interactions at the gas–liquid interface.The key observed phenomena include the interaction of impact waves with liquid sheet perforation and the breakup of web of ligaments,both of which are prominent under high backpressure conditions.A novel method,based on the threshold velocity of spray droplet groups,is employed to quantitatively measure the spreading angle,showing that the angle increases with We in both front and side views.Additionally,the Sauter mean diameter of droplets follows power-law scaling with exponents of-1/3 in the upstream region and-1/2 in the downstream region,while the droplet size distribution conforms to a log-normal profile.This research provides valuable insights into interface evolution and droplet characteristics during impingingjet atomization under high backpressure,offering essential guidance for optimizing industrial atomization processes. 展开更多
关键词 Direct numerical simulations High-pressure Impinging-jet atomization Interfacial evolutions Spray characteristics
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Control of fine grain structures and strengthening-toughening mechanisms in magnesium alloys fabricated by wire-arc directed energy deposition 认领 引用
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作者 Wei Liu Hai-long Jia +4 位作者 Yi-hang Yang Min Zha Artem Marchenkov Pin-kui Ma Hui-yuan Wang 《China Foundry》 SCIE EI CAS CSCD 2026年第3期367-376,共10页
Wire-arc directed energy deposition(WA-DED)has attracted considerable attention for the fabrication of magnesium(Mg)alloys due to its high efficiency,low cost,and rapid prototyping capability for complex components.Ho... Wire-arc directed energy deposition(WA-DED)has attracted considerable attention for the fabrication of magnesium(Mg)alloys due to its high efficiency,low cost,and rapid prototyping capability for complex components.However,the inherent rapid solidification and complex thermal cycling associated with WA-DED often result in coarse columnar grains and pronounced mechanical anisotropy,which severely limiting its application potential.In this study,a novel spiral oscillation(SO)strategy was implemented during WA-DED AZ31 Mg alloy to refine the microstructure,reduce mechanical anisotropy,and achieve a strength-ductility synergy.Specifically,the yield strength(YS),ultimate tensile strength(UTS),and elongation(EL)are increased by 9.7%,38.1%,and 147%,respectively.These improvements by the SO strategy are primarily attributed to the promotion of columnar-to-equiaxed transformation(CET),a 74.2% reduction in maximum texture intensity,and a more uniform distribution of second-phase particles.Second-phase particles are primarily composed of Al8Mn5 and Al8Mn4Y.This study provides a novel strategy for microstructural control aimed at improving the performance of WA-DED AZ31 Mg alloy components. 展开更多
关键词 magnesium alloy wire arc directed energy deposition spiral oscillation isotropy strength-ductility synergy
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Uncovering the impact of Gd content on the microstructure and mechanical properties of wire-arc directed energy deposited Mg-Gd-Y-Zr alloys 认领 引用
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作者 Xinzhi Li Jiarong Guo +6 位作者 Mugong Zhang Li Guan Haonan Wu Jian Zhou Xuewei Fang Liang Gui Ke Huang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第5期96-114,共19页
The preparation of large-sized magnesium rare-earth(Mg-RE)alloy parts using wire-arc directed energy deposition(WA-DED)has clear advantages such as high-efficiency and cost-effective.The impact of Gd content,which is ... The preparation of large-sized magnesium rare-earth(Mg-RE)alloy parts using wire-arc directed energy deposition(WA-DED)has clear advantages such as high-efficiency and cost-effective.The impact of Gd content,which is one of the most important RE elements,on the microstructure evolution and mechanical response of the as-deposited and heat-treated Mg-Gd-Y-Zr alloys,deserves to be thoroughly unveiled.Herein,multi-scale microstructure characterization and mechanical evaluation of Mg-xGd-2Y-0.5Zr(wt%,x=4,7,and 10)alloys were carried out.Specifically,the increased Gd content facilitates the grain refinement,micro-segregation,and precipitation during the deposition process.As a result,the strength of the as-deposited samples with increased Gd content was improved through refined grain and dispersion strengthening of nano-β",but the ductility was severely deteriorated due to the premature failure caused by excessiveβ-Mg24(Gd,Y)5eutectic phases.Besides,the increased Gd content successfully restrains grain coarsening through higher content of eutectic phase and larger RE-rich region during solution treatment.Following peak-aging treatment,while the increased Gd content does not affect the precipitation types,the content of nano-β’was remarkably enhanced,which leads to excellent strength.Ultimately,a superior yield strength of 239 MPa,an ultra-high ultimate tensile strength of 371 MPa and an elongation of 4%are achieved in the solution plus aging-treated Mg-10Gd-2Y-0.5Zr alloy.This study thus provides guidelines on the composition modification and post-treatment of WA-DED Mg-Gd-Y-Zr alloys suitable for engineering applications. 展开更多
关键词 Wire-arc directed energy deposition Mg-Gd-Y-Zr alloy Gd content Microstructure evolution Mechanical response
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Mechanical and in situ thermal-related behavior during directed energy deposition additive manufacturing of a high-performance Al alloy 认领 引用
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作者 Da Guo Chengbo Zhu +9 位作者 Harry E.Chapman Kai Zhang Wei Li Shishira Bhagavath Robert Atwood Stefan Michalik Dmitry G.Eskin Iakovos Tzanakis Chu Lun Alex Leung Peter.D.Lee 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期616-631,共16页
Directed energy deposition(DED)additive manufacturing(AM)can fabricate,repair,and join near-net-shaped components for high-performance engineering applications,including biomedical,energy,and transport sectors.The bro... Directed energy deposition(DED)additive manufacturing(AM)can fabricate,repair,and join near-net-shaped components for high-performance engineering applications,including biomedical,energy,and transport sectors.The broader adoption of DED remains constrained by the limited number of alloys available that can be reliably manufactured without imperfections,hence limiting mechanical properties.Here,we designed an Al-Ni-Ce-Mn-Fe AM alloy that can achieve an ultra-fine microstructure(<5μm),uniform distribution of intermetallics,low residual stress(<32 MPa),and superior mechanical properties in as-built DED components.Compared to DED AlSi10Mg in the as-built state using the same conditions,the yield increased by 70%,and the ultimate tensile strength by 50%.DED-AM involves rapid cooling and complex thermal conditions,which largely influence the property of the final components.Post-characterization cannot capture the time resolved thermal behavior,hence offer limited mechanism-based guide for alloy design.In this study,we develop a novel multimodal characterization methodology for correlative in situ X-ray imaging,X-ray diffraction,and infrared imaging,enabling quantification of the in situ thermal-related behavior,including phase evolution,temperature distribution,and stress accumulation during DED.We elucidated key mechanisms driving the structure refinement and stress development in this alloy.The insights gained into the interplay between alloy composition,thermal-related behavior,and performance under specific AM conditions inform next-generation material design tailored for AM technologies. 展开更多
关键词 directed energy deposition synchrotron X-ray diffraction synchrotron X-ray imaging microstructure properties additive manufacturing
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Microstructures,mechanical properties and corrosion resistances of FCC CoCrFeNiTi high-entropy alloys prepared by pre-alloyed powder mixing and vacuum laser-directed energy deposition 认领 引用
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作者 Jian Zhu Shuhao Zhao +3 位作者 Zhen Li Yi Xu Shuai Wu Xidong Hui 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第6期2029-2040,共12页
In this study,vacuum laser-engineered directed energy deposition(V-LDED)was employed to fabricate CoCrFeNiTix(x=0.1,0.2,0.3)high-entropy alloys(HEAs)by strategically mixing equiatomic pre-alloyed CoCrFeNi and CoCrF... In this study,vacuum laser-engineered directed energy deposition(V-LDED)was employed to fabricate CoCrFeNiTix(x=0.1,0.2,0.3)high-entropy alloys(HEAs)by strategically mixing equiatomic pre-alloyed CoCrFeNi and CoCrFeNiTi powders.With increas-ing Ti content,the lattice distortion of the HEAs intensified,grains were refined,and precipitate content increased;however,the face-centered cubic(FCC)structure remained the predominant structure.The strength and plasticity of the HEAs initially increased and then decreased with the addition of Ti.The CoCrFeNiTi0.3(Ti0.3)alloy exhibited the best mechanical properties,with a tensile yield strength(TYS)of 604 MPa,an ultimate tensile strength(UTS)of 882 MPa,and a plastic elongation of 13.5%.Compared to the Ti-free alloy,the TYS and UTS were increased by 124%and 83%,respectively.The CoCrFeNiTi0.2(Ti0.2)alloy showed the best corrosion resistance with the corrosion potential(Ecorr),corrosion current density(Icorr),passivated film resistor(Rc),and charge transfer resistance(Rct)values of-0.208 V,4.889×10-7A/cm2,7.03×103Ω/cm2,and 8.50×105Ω/cm2,respectively.The addition of Ti increased the Cr and Ti contents in the passive film,which are easily passivated elements.The multiple effects of Ti on the corrosion resistance were mainly attributed to the formation and composition of the passive film and density of the precipitates. 展开更多
关键词 vacuum laser-engineered directed energy deposition CoCrFeNiTi alloys microstructures mechanical properties corrosion resistance
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Effect of Metastable Phase Content Controlled by Heat-Treatment on High Temperature Oxidation Performance of Directionally Solidified Ni-Si Hypereutectic Composites 认领 引用
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作者 LI Wei CUI Chunjuan +5 位作者 LIANG Zhanpeng LIU Wei ZHAO Zhiqi LI Haolin SU Haijun LUO Lei 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第3期639-649,共11页
Different annealing heat treatment processes were performed on Ni-Si hypereutectic composites at the solidification rate of 40μm/s to eliminate the metastable phase and the best heat treatment process was selected(an... Different annealing heat treatment processes were performed on Ni-Si hypereutectic composites at the solidification rate of 40μm/s to eliminate the metastable phase and the best heat treatment process was selected(annealing temperature 1000℃,holding time 4 h).The oxidation weight gain and oxide rate,oxide film morphology,and oxidation kinetics of Ni-Si hypereutectic composites were studied.Moreover,the formation mechanism of the oxide film was investigated through a thermodynamic analysis,specifically by calculating the change of Gibbs free energy associated with the oxidation reactions.It is found that the oxide resistance of the Ni-Si hypereutectic composite without metastable phase is better than that of the 67.9%content of the metastable phase.The surface of oxidized film is composed of granular NiO,while the underlying layer of oxidized film is composed of platelet-shaped SiO2 and spinel-like nickel silicate Ni2SiO4.Directionally solidified Ni-Si hypereutectic composites have potential applications in high temperature fields.However,Ni31Si12 metastable phase is inevitably formed due to the non-equilibrium solidification,which makes the overall properties of the material unstable. 展开更多
关键词 directional solidification Ni-Si hypereutectic composite metastable phase annealing heat treatment high temperature oxidation
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Intelligent analysis of direct coal liquefaction diesel components by near-infrared spectroscopy 认领 引用
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作者 WANG Xiwu LI Haowei +4 位作者 QI Zhendong WANG Xingbao FENG Jie ZHU Yimeng LI Wenying 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第4期17-28,共12页
Diesel accounts for over 60%of the products derived from direct coal liquefaction(DCL).Compared to petroleum-based diesel,DCL diesel exhibits a cetane number ranging from 30 to 40,which fails to meet the automotive di... Diesel accounts for over 60%of the products derived from direct coal liquefaction(DCL).Compared to petroleum-based diesel,DCL diesel exhibits a cetane number ranging from 30 to 40,which fails to meet the automotive diesel standard requirement of≥45.Therefore,rapid and accurate analysis of its chemical composition is crucial for property optimization to meet fuel specifications by component blending.Thought traditional methods like gas chromatography offer high accuracy,they are unsuitable for rapid online analysis under industrial conditions.Near-infrared(NIR)spectroscopy can provide advantages in rapid,non-destructive analysis.Its application however,is limited by the complexity of spectral data interpretation.Machine learning(ML)is effective method for extracting valuable information from spectra and establishing high-precision prediction models.This study integrates NIR spectroscopy with ML to construct a spectral-composition database for DCL diesel.Feature extraction was performed using the correlation coefficient and mutual information methods to screen key wavelength variables and reduce data dimensionality.Subsequently,the predictive performance of three ML models—Lasso,SVR and XGBoost—was compared.Results indicate that excluding spectral data with absorbance greater than 1 significantly enhances model accuracy,increasing the test set R2 from 0.85 to 0.96.After feature extraction,the optimal number of wavelength variables was reduced to 177,substantially improving computational efficiency.Among the models evaluated,the SVR-MI-0.9 model,based on mutual information feature selection,demonstrated the best performance,achieving training and test set R2 values both exceeding 0.98.This model enables precise prediction of paraffin,naphthene,and aromatic hydrocarbon contents.This research provides a robust methodology for intelligent online quality monitoring.An intelligent NIR spectroscopy data analysis software was independently developed based on the established model.Compared with comprehensive two-dimensional gas chromatography,the software reduced the analysis time by over 98%,with an absolute prediction error below 0.2%.Thus,rapid analysis of DCL diesel components was successfully realized. 展开更多
关键词 direct coal liquefaction diesel real-time spectral detection machine learning feature extraction component prediction
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Large-scale PM2.5 removal and CO2 direct air capture to mitigate ambient air pollution and combat global climate change 认领 引用
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作者 David Y.H.Pui Qingfeng Cao +2 位作者 Thomas Kuehn Charles Lo Sheng-Chieh Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期37-47,共11页
This paper summarizes a decade of development of a Solar-Assisted Large-Scale Cleaning System(SALSCS)aimed at mitigating urban PM2.5.This effort has led to the construction and operation of four SALSCS units locate... This paper summarizes a decade of development of a Solar-Assisted Large-Scale Cleaning System(SALSCS)aimed at mitigating urban PM2.5.This effort has led to the construction and operation of four SALSCS units located in Xi'an(China),Yancheng(China),and New Delhi(India).Six papers have been published to document the modeling,design,construction,operation,and measurement of three generations of SALSCSs.The Weather Research and Forecasting(WRF)model was utilized to obtain local meteorological information and solar intensity conditions around the SALSCS.Reynolds-Averaged Navier-Stokes(RANS)simulations and Large Eddy Simulation(LES)have been employed to study the flow patterns and clean air concentration profiles near the units.The first generation SALSCS(Xi'an)takes the form of an updraft solar tower that utilizes solar heating to drive a large volume of air flow through the SALSCS.Filters are positioned along the flow path to remove PM2.5,resulting in cleaner air exiting the top of the tower.In the second generation SALSCS(Yancheng),the media filters are replaced with water spray to scrub out PM2.5.The third generation SALSCS(New Delhi)employs a set of fans to draw PM2.5 from the tower inlet through prefilters and final filters,blowing the cleaned air out near ground level to pedestrians surrounding the SALSCS.A proposal is presented that combines the 1st and 2nd Generation SALSCSs equipped with solar panels and direct air capture(DAC)of CO2 to achieve energy self-sufficiency and large-scale capture of 100 million tons of CO2 annually(100 Mt CO2/yr). 展开更多
关键词 PM2.5 CO2 Global climate change Solar-assisted large-scale cleaning system Direct air capture Sustainability
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Excitation direction and intensity-dependent damping performance of a nonlinear energy sink:theory and experiments 认领 引用
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作者 Xiaofeng GENG Shican LIU +4 位作者 Li ZHANG Kexiang WEI Yingan KANG Xingjian JING Hu DING 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第7期1433-1446,共14页
The traditional nonlinear energy sink(NES)exhibits high robustness over a wide frequency interval under unidirectional excitation.However,variable excitation directions and intensities are common in engineering applic... The traditional nonlinear energy sink(NES)exhibits high robustness over a wide frequency interval under unidirectional excitation.However,variable excitation directions and intensities are common in engineering applications,and the vibration reduction performance of the conventional NES remains uncertain.In this paper,a dynamic model of a linear oscillator(LO)equipped with an NES is established to investigate the effects of the excitation direction and intensity on the NES performance.Moreover,a three-dimensional model is designed,and a corresponding experimental platform is constructed.The vibration reduction performance of a conventional NES is theoretically investigated under variable excitation directions and intensities.Moreover,the dynamic characteristics are revealed for both free and forced vibrations.Experimental tests are conducted to validate the prediction results.This study demonstrates that the vibration suppression performance of the NES is highly sensitive to both the excitation direction and intensity.Overall,although the performance of the NES decreases with increasing excitation angle,vibration can be effectively suppressed over a wide angle range.This finding indicates that the traditional NES is highly robust to the excitation direction.In addition,the NES exhibits notable damping performance within a wide excitation range,especially at high excitation angles.For relatively low and very high excitation intensities,the performance of the NES is poor.The vibration reduction trend under the coupling effect of the excitation intensity and direction is systematically revealed.A critical excitation intensity is identified,at which the NES exhibits weaker performance at low angles but enhanced performance at high angles.The findings provide a theoretical basis for promoting NES engineering applications. 展开更多
关键词 nonlinear energy sink(NES) excitation direction excitation intensity passive suppression vibration reduction efficiency
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Continuous-variable quantum secure direct communication with one-time pad 认领 引用
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作者 Yi-Yu Mao Chang-Hua Hu +2 位作者 Wen-Ti Huang Wei Zhao Lei Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第4期121-129,共9页
Quantum secure direct communication(QSDC)enables the direct transmission of secret messages over a quantum channel without prior key sharing.QSDC implemented in the continuous-variable(CV)regime allows high-capacity i... Quantum secure direct communication(QSDC)enables the direct transmission of secret messages over a quantum channel without prior key sharing.QSDC implemented in the continuous-variable(CV)regime allows high-capacity information transmission using simple optical communication technologies.In this work,we propose a novel CV-QSDC protocol with a quantum one-time pad,which achieves secure message transmission based on coherent states and unitary operations,and the receiver can directly obtain the secret messages after measuring the coherent states.The security of this protocol is jointly guaranteed by one-time pad encryption and a CV quantum key distribution(QKD)protocol.Performance analysis shows that the proposed scheme can achieve a quantum bit error rate(QBER)lower than 1% by adjusting the modulation variance and unitary operation parameters.With the optimal modulation variance,the secure transmission distance of the proposed protocol can exceed 150 km. 展开更多
关键词 quantum secure direct communication quantum-one-time pad continuous-variable
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Characterization of heat treatment-driven microstructural evolution,mechanical properties and electrochemical behavior of direct powder forged Al–10Si–0.3Mg alloy 认领 引用
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作者 Akanksha Dwivedi K.E.R.V.Prasad +3 位作者 Debdipta Banik Saikat Mandal A.Durga Prasad Srinu Gangolu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第4期1225-1241,共17页
This study investigated the effects of direct aging(DA),solution treatment(ST),and ST followed by DA(T6)on the microstructural,mechanical,and corrosion properties of direct powder forged Al–10 Si–0.3 Mg alloy specim... This study investigated the effects of direct aging(DA),solution treatment(ST),and ST followed by DA(T6)on the microstructural,mechanical,and corrosion properties of direct powder forged Al–10 Si–0.3 Mg alloy specimens.Microstructural analyses conducted using optical microscopy,scanning electron microscopy,and electron backscatter diffraction revealed that among DA specimens,direct aging at 200℃(DA-2)exhibited significantly enhanced silicon(Si)particle distribution uniformity and minimal interparticle boundaries owing to increased diffusion bonding;ST specimens exhibited partial Si dissolution,higher porosity,and retained the interparticle boundaries;and T6 specimens exhibited improved microstructural uniformity and enhanced Si precipitation.Furthermore,mechanical property evaluations indicated that T6 treatment comprising ST at 500℃for 180 min followed by DA at 200℃for 360 min resulted in the highest tensile strength(207.15 MPa)and elongation(5.02%),followed closely by DA at 200℃for 360 min(203.13 MPa and4.39%).These improvements were attributed to the lower residual stress,higher diffusion distances,and well-dispersed Si particles induced by DA-2 treatment.Corrosion analyses conducted using cyclic polarization and impedance spectroscopy indicated varied electrochemical responses,with DA-2 resulting in the lowest corrosion current and highest impedance,and ST resulting in the lowest corrosion resistance.Overall,DA at 200℃for 360 min was the most effective heat treatment,offering the optimal balance between mechanical and corrosion-resistance properties. 展开更多
关键词 Al-10Si-0.3Mg direct powder forging heat treatment microstructure mechanical properties corrosion behavior
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Direct Ink Writing of Biodegradable Elastic Scaffolds via Rapid Thiol-Acrylate Photocrosslinking 认领 引用
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作者 Xiao-Yu Li Chong-Guang Li +3 位作者 Kai Chen Yan Xiao Xin-Xin Li Mei-Dong Lang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第5期1489-1501,I0016,共13页
Direct ink writing(DIW)has emerged as one of the most promising approaches for biomedical application,owing to its broad material compatibility,ease of operation,and high-resolution.However,the development of DIW inks... Direct ink writing(DIW)has emerged as one of the most promising approaches for biomedical application,owing to its broad material compatibility,ease of operation,and high-resolution.However,the development of DIW inks with suitable rheological properties and excellent biocompatibility remains a significant challenge.Herein,an acrylate-functionalized liquid poly(4-methyl-ε-caprolactone)(PMCLDA)was synthesized as the precursor of 3D printing ink,accompanied with thiol-functionalized polyethylene glycol(PEGSH)as a rheological modifier.It was indicated from rheology study that the incorporation of PEGSH with PMCLDA precursor afforded the mixt inks shear thinning behavior.Moreover,it was verified by in situ Fourier transform infrared spectroscopy and photo-rheology that the mixed ink could rapidly cure through thiol-acrylate crosslinking under UV light.Various inks formulations were successfully utilized for printing 3D scaffolds via UV-assisted DIW,with the optimized printability for SH75 ink.Moreover,the 3D-printed scaffolds exhibited excellent elasticity and degradability.In vitro cytocompatibility assessments showed that the scaffolds exhibited good cytocompatibility and supported the proliferation of L929 mouse fibroblasts for a duration of 7 days.Therefore,it is demonstrated that the 3D-printed scaffolds crosslinked via thiol-acrylate crosslinking have great potential for applications in tissue engineering. 展开更多
关键词 Thiol-acrylate crosslinking Direct ink writing(DiW)printing Elastic scaffold Biodegradable material
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Achieving excellent ductility in a Hf-Nb-Ta-Zr refractory multi-principal-element alloy via electron-beam directional-solidification 认领 引用
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作者 Xiao-Xiao Wang Tian-Lu Qin +10 位作者 Yun-Quan Li Yi-Chen Xu Meng-Han Zhang Ke-Yu Yan Hao-Xuan Li Guo-Dong Li Xu Yang Pei-Lin Wang Xiao-Juan Bai Yu-Ye Wu Cheng-Bao Jiang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第3期300-308,共9页
Exploiting effective approaches to achieve superior ductility has consistently been a topic of widespread interest in refractory multi-principal-element alloys(RMPEAs).Herein,we developed a one-step forming method,ele... Exploiting effective approaches to achieve superior ductility has consistently been a topic of widespread interest in refractory multi-principal-element alloys(RMPEAs).Herein,we developed a one-step forming method,electron-beam directional-solidification(EB-DS),to fabricate an equiatomic Hf-Nb-Ta-Zr RMPEA,and compared its microstructures as well as mechanical properties with those of the as-cast alloy fabricated by levitation induction melting.EB-DS method can transform the equiaxed grain microstructures in the as-cast alloy to columnar grain microstructures as well as eliminate the slight segregation.The room-temperature tensile test demonstrates that the ductility is substantially improved from 3.9%for the as-cast alloy to 23%for EB-DS alloy,accompanied by the slight enhancement in yield strength from 946 to 991 MPa.The microstructural investigations indicate that EB-DS alloys with columnar grains present a significantly optimized coordinated plastic deformation between the grain boundary region and the grain interior region,leading to the suppression of cracking along grain boundaries. 展开更多
关键词 Refractory multi-principal-element alloy Hf-Nb-Ta-Zr Mechanical property Electron-beam directional solidification Coordinated plastic deformation
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Direct Application of Fresh Spent Mushroom Substrates Enhances Rice Grain Yields 认领 引用
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作者 Hengdong Zhang Rongji Wang +2 位作者 Jianchong Zhang Fali Zhang Zhiwang He 《Phyton-International Journal of Experimental Botany》 SCIE 2026年第3期177-190,共14页
Spent mushroom substrate(SMS),the residual byproduct of mushroom cultivation,represents a nutrient-rich agro-residues with potential for paddy field application.This study evaluated the effect of direct SMS applicatio... Spent mushroom substrate(SMS),the residual byproduct of mushroom cultivation,represents a nutrient-rich agro-residues with potential for paddy field application.This study evaluated the effect of direct SMS application on rice yield,yield components,biomass production,and nitrogen uptake(NU),aiming to provide useful information for fresh SMS utilization in paddy.Field experiments were conducted using a split-plot design with three replications,three SMS rates(0,9,and 18 t ha−1 dry matter)as the main plots and three nitrogen(N)(0,90,180 kg ha−1)as subplots in 2023 and 2024.Each plot was planted with rice cultivars Jingliangyou-534(2023–2024)and Yongyou-1540(2024).Results indicated that SMS application(9 and 18 t ha−1)significantly increased nitrogen content in straw and grain at maturity by 8.54%–41.42%and 1.71%–16.27%,respectively.Correspondingly,NU in straw,grain,and aboveground increased by 11.85%–92.81%,11.22%–43.59%,and 11.28%–53.18%,respectively.Aboveground biomass,panicles per m2 and spikelets per panicle increased by 6.83%–27.66%,0.44%–24.54%,and 5.01%–13.26%,respectively;no consistent effects were observed on setting rate for either cultivar across both years.Grain yield improved by 4.70%–23.57%,compared with no SMS application.These findings provide preliminary evidence that fresh SMS(≤18 t ha−1 dry matters)can be applied directly,without composting,as a convenient and effective strategy to enhance rice productivity,though further studies are needed to clarify the mechanisms underlying increased N uptake. 展开更多
关键词 Spent mushroom substrate direct application rice yield nitrogen uptake
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Direct position determination based on rotating single-baseline interferometer for multiple time-frequency aliased sources 认领 引用
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作者 Yuan ZHANG Guizhou WU +2 位作者 Fucheng GUO Zihan YAO Min ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第2期389-401,共13页
Rotating Single-Baseline Interferometer(RSBI)systems have attracted considerable attention for Direct Position Determination(DPD)due to their simplicity and high localization accuracy.Nevertheless,the growing complexi... Rotating Single-Baseline Interferometer(RSBI)systems have attracted considerable attention for Direct Position Determination(DPD)due to their simplicity and high localization accuracy.Nevertheless,the growing complexity of electromagnetic environments has led to scenarios with multiple time-frequency aliased sources,rendering conventional DPD methods for RSBI systems ineffective.Previous studies have predominantly concentrated on deploying antenna arrays and applying related signal-processing techniques for localization.Typically,these approaches necessitate that the number of physical antennas exceeds the number of sources.For RSBI systems already in practical operation,this would entail the installation of additional physical antennas,which implies equipment recycling and hardware upgrades.In numerous cases,such modifications are unfeasible.This paper proposes a novel Relative Offset-based Direct Position Determination(RO-DPD)method for RSBI systems that can handle multiple time-frequency aliased sources.The proposed method overcomes the challenge of simultaneous positioning without requiring hardware modifications by leveraging time accumulation and algorithmic enhancements.The implementation of the method involves three key steps.Firstly,the rotation of the interferometer is synthesized into a virtual Uniform Circular Array(UCA).Secondly,a novel estimation variable,termed relative offset,is introduced.The variable serves as an intermediate parameter to establish correlation equations between the positions of multiple time-frequency aliased sources and the intercepted signals.Thirdly,the relative offset model in the UCA is transformed into a virtual Uniform Linear Array(ULA)model,from which the cost function can be derived via the Spatial Smoothing(SS)MUSIC algorithm.Theoretical analysis and simulation results verify the effectiveness of the proposed method.Compared with traditional approaches,the RO-DPD method maintains the low complexity of RSBI systems while demonstrating robust performance in complex electromagnetic environments. 展开更多
关键词 Rotating single-baseline interferometer Direct position determination Uniform circular array Array processing
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