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Efficient Full-Range Nonlinear Analyses of Structural Systems Based on Heterogeneous Graph Learning 认领 引用 被引量：2
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作者 Linghan Song Chen Wang Jiansheng Fan 《Engineering》 SCIE EI CSCD 2026年第4期320-336,共17页
Nonlinear analyses possess tremendous significance throughout the entire lifespans of civil structures.In recent years,the interest in leveraging deep learning(DL)to address the efficiency limitations of the tradition... Nonlinear analyses possess tremendous significance throughout the entire lifespans of civil structures.In recent years,the interest in leveraging deep learning(DL)to address the efficiency limitations of the traditional structural analysis methods has increased.However,full-range nonlinear analyses of different structures remain underresearched because of a lack of appropriate data representations and the failure to consider both internal structural information and external load conditions.A heterogeneous graph(HetG)representation scheme that can digitalize arbitrary structural systems with high fidelity is proposed in this study.Furthermore,a composite feature learning framework is developed to enable efficient full-range nonlinear analyses.This framework comprises two main components:①a heterogeneous graph neural network(GNN)-based module that encodes static features into embeddings with full structural semantics and②a sequence-to-sequence(Seq2Seq)module that predicts history-dependent responses using structural embeddings and external stimuli in an end-to-end manner.A computational model named structural analysis based on a graph neural network-nonlinear(StructGNN-N)is implemented based on the proposed methodology and is validated through numerical experiments involving real-world concrete structures.The results show that StructGNN-N successfully reproduces the full-range nonlinear responses of all nodes in the entire structure and exhibits excellent generalizability across structures with diverse topological designs and member configurations.Notably,the developed model achieves a computational efficiency level that is 1000 times greater than that of the traditional elastoplastic history analysis approach using the finite-element(FE)method.A parametric analysis and ablation studies demonstrate the effectiveness of the StructGNN-N architecture.Due to its superior accuracy and computational efficiency,the proposed method holds great potential for use in engineering applications,especially in the context of digital twins.This approach provides an inspiring path for simulating diverse engineering structures with accurate and comprehensive mechanical information in real time. 展开更多
关键词 Structural system analysis Heterogeneous graph-based deep learning Full-range response prediction Digital twin Smart structural engineering
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Definition of critical skin defect and concepts of structural and functional repairs:Proposal and verification in a rat model 认领 引用 被引量：1
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作者 Cong Sun Weihong Guo +4 位作者 Fang Liang Rabia Javed Weijian Hou Xingdong Zhang Qiang Ao 《Animal Models and Experimental Medicine》 CAS CSCD 2026年第1期168-182,共15页
Background:Rats are often used to prepare skin defect models.However,the skin defect sizes of the models prepared by researchers are different,and the lack of consensus on the critical-size defect makes it difficult t... Background:Rats are often used to prepare skin defect models.However,the skin defect sizes of the models prepared by researchers are different,and the lack of consensus on the critical-size defect makes it difficult to compare their research results.Methods:The time for wound closure was evaluated and recorded through gross observation.The regression equation between the healing time and the diameter of skin defect was established,which can be used to predict the healing time for a certain skin defect size in rats.Histochemical and immunohistochemical staining was used to observe the regeneration and reconstruction of skin appendages,and the functional skin repair was quantitatively scored.Results:The critical-size defect of rats was determined based on the maximum capacity of structural skin repair,and the functional skin repair was quantitatively scored based on the regeneration and reconstruction of skin appendages.The allowable range of critical-size skin defect of SD rats lies between 45 and 50 mm in diameter.The concept of structural repair and the category of functional repair of injured skin are put forward.The regression equation between the structural skin healing time and defect diameters is established.Conclusion:The allowable range of skin critical-size defect of SD rats lies between 45 and 50 mm in diameter.The regression equation between the structural skin healing time and defect diameters can be used to predict the healing time for a certain skin defect size in rats. 展开更多
关键词 critical defect functional repair quantitative evaluation skin defect structural repair
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Surface reconstruction via rapid solution quenching to enhance structural stability of lithium-rich layered cathodes 认领 引用 被引量：1
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作者 Hailiang Chu Jiaxiao Meng +4 位作者 Longde Duan Shujun Qiu Errui Wang Fen Xu Lixian Sun 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1553-1563,I0092-I0106,共11页
Lithium-rich layered oxides are prospective materials for future-generation cathodes attributable to their high specific capacity.However,significant surface instability,particularly under high-voltage operating condi... Lithium-rich layered oxides are prospective materials for future-generation cathodes attributable to their high specific capacity.However,significant surface instability,particularly under high-voltage operating conditions,leads to substantial voltage decay and dramatic capacity degradation during long-term cycling,severely limiting their widespread application.In this study,we developed a universal brine quenching strategy to construct a stabilized composite surface structure for lithium-rich layered oxides.This structure comprises an inner surface layer with a Y-doped layered structure and an outermost layer featuring a disordered rock-salt structure.Doping in the layered structure strengthens the Y-O bonds,raises the energy barrier for oxygen evolution,and significantly increases the stability of the lattice oxygen.Additionally,the disordered rock-salt surface structure reduces oxygen release during the charge and discharge cycles.Consequently,this well-designed surface structure significantly boosts the structural stability of the lithium-rich layered oxide surface,suppresses structural degradation during long-term cycling,and facilitates Li+diffusion kinetics.The improved redox activity,combined with superior structural stability,contributes to an outstanding electrochemical performance.For instance,the Y-quenched Li1.2Mn0.54Ni0.13Co0.13O2(LLO)cathode exhibited an improved discharge capacity of 283 mAh·g-1at 0.1 C and 223 mAh·g-1at 1 C,along with remarkable cyclic stability retaining 91.2% of its capacity after 300 cycles at 1 C,and a reduced voltage decay of 0.76 mV per cycle(compared to 1.16 mV per cycle for pristine LLO).This research provides valuable insights into the design and synthesis of high-energydensity lithium-rich layered oxides through a simple and cost-effective strategy. 展开更多
关键词 Li-rich layered oxides brine quenching surface structure voltage decay cycling stability
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Phase-Dependent Structural, Optical, and Thermodynamic Behavior of BaTiO3: Insights from First-Principles Calculations 认领 引用 被引量：1
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作者 Yasemin O.Ciftci İlknur K.Durukan +1 位作者 Upasana Rani Peeyush Kumar Kamlesh 《Computers, Materials & Continua》 SCIE EI 2026年第6期935-956,共22页
This study examines the phase-dependent structural,electronic,optical,and thermodynamic characteristics of the cubic,tetragonal,and orthorhombic phases of BaTiO3 using DFT simulations.Lattice parameters and bulk mo... This study examines the phase-dependent structural,electronic,optical,and thermodynamic characteristics of the cubic,tetragonal,and orthorhombic phases of BaTiO3 using DFT simulations.Lattice parameters and bulk moduli computed through structural optimizations within the GGA-PBE framework are in good agreement with existing experimental and theoretical studies.All phases exhibit negative formation energies,indicating thermodynamic stability,with the orthorhombic phase being the most stable.Electronic structure calculations reveal indirect band gaps of 2.86,2.96,and 3.43 eV for the cubic,tetragonal,and orthorhombic phases,respectively.The density of states analysis indicates that O-p states dominate the valence band,and Ti-d states are the primary source of the conduction band.The optical properties of BaTiO3 have been evaluated using the frequency-dependent dielectric function over 0-15 eV,showing strong optical absorption in both the visible and ultraviolet regions.The optical band gap is consistent with the electronic results.The dielectric constants for all three phases of BaTiO3 are calculated to be 4.7,4.4,and 4.5,while the refractive indices are 2.18,2.09,and 2.12,respectively.In the infrared and visible regions(below~3.1 eV),the refractive index exhibits relatively high,weakly dispersive behavior for all phases,indicating strong polarization and low optical losses.The thermodynamic properties of BaTiO3 were evaluated using the quasi-harmonic Debye model in the temperature range 0-1000 K and pressure range 0-30 GPa.The calculated thermodynamic parameters suggest that the bulk modulus decreases with increasing temperature but increases with increasing pressure.At very high temperatures,the heat capacity approaches the Dulong-Petit limit.This study suggests that BaTiO3 shows potential for optoelectronic and high-temperature applications. 展开更多
关键词 DFT BaTiO3 thermodynamic properties optical properties structural properties
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Comprehensive structural and hydrogenation analysis of arc-melted and melt-spun Mg1.95Ag0.05Ni:Experimental and theoretical approaches 认领 引用 被引量：1
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作者 Sefa Emre Sünbül Kürşat Için +2 位作者 Sultan Oztürk Mirjana Medic Ilić Katarina Batalović 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第5期1410-1423,I0008-I0011,共14页
This study investigates the impact of silver(Ag)substitution on the microstructure and hydrogen storage properties of an Mg2Ni-based alloy.Density functional theory(DFT)calculations as well as universal machine lea... This study investigates the impact of silver(Ag)substitution on the microstructure and hydrogen storage properties of an Mg2Ni-based alloy.Density functional theory(DFT)calculations as well as universal machine learning interatomic potentials are used to explore how Ag substitution leads to a decreased hydride desorption energy.Experimental analysis of arc-melted Mg1.95Ag0.05Ni alloys and melt-spun Mg1.95Ag0.05Ni ribbons reveals structural changes between the two different production methods.X-ray diffraction(XRD),scanning electron microscope(SEM),differential thermal analysis(DTA),thermogravimetric analysis(TGA),and transmission electron microscope(TEM)confirm refined microstructures.In addition,hydrogen properties of melt-spun ribbons were measured with Sievert type and electrochemical device.The Sieverts-type measurement demonstrates about 3wt%H2absorption and desorption,while electrochemical measurements show an initial discharge capacity of 80 mAh/g,with gradual fading over cycles.X-ray photoelectron spectroscopy(XPS)unambiguously confirms Ag substitution and provides detailed insight into surface oxidation processes induced by prolonged exposure to ambient conditions.The results demonstrate that Ag incorporation plays a key role in tailoring the microstructure and significantly enhancing the hydrogen storage performance. 展开更多
关键词 hydrogen storage magnesium-based alloys arc-melted melt-spun density functional theory electronic structure silver addition
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Structural engineering of nickel-rich cathode material for improved cycling performance of lithium-ion batteries 认领 引用
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作者 Siyuan Zhang Pengxiang Ji +4 位作者 Sijie Guo Tingting Wu Muyao Qi Dong Su An-Min Cao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第3期52-59,共8页
Nickel-rich cathodes(NRCs)hold great promise for next-generation high-energy lithium-ion batteries(LIBs)due to high specific energy and low cost.However,the higher Ni content exacerbates the instability issues associa... Nickel-rich cathodes(NRCs)hold great promise for next-generation high-energy lithium-ion batteries(LIBs)due to high specific energy and low cost.However,the higher Ni content exacerbates the instability issues associated with structural degradation and side reactions during electrochemical cycling.Herein,we demonstrate the possibility of preparing NRCs,typically Li Ni0.9Co0.05Mn0.05O2(NCM9055),with much-improved mechanical and chemical stability based on the surface coating of the hydroxide precursors.Specifically,a conformal nanoshell containing both Al3+and W6+was first deposited around the precursor particles,and the following high-temperature lithiation produced the targeted NCM9055 with favorable structural features,where Al3+existed as a bulk dopant to enhance the structural stability while the high-valent W6+promoted the microstructural evolution into radially-architectured elongated primary particles.Such a structural engineering benefiting from the Al3+/W6+co-modification endowed the prepared NCM9055 cathode(NCM9055-Al W)with much-improved cycling stability,as revealed by a high-capacity retention of 98.0%after 100 cycles(tested at 0.5 C,4.3 V)as compared to only 79.0%for the pristine cathode without Al3+/W6+.The NCM9055-15Al W cathode also showed a high-rate capability with extraordinary structural stability against mechanical failure.Our study highlighted the enormous potential of precursor multi-element treatment as an effective tool in structural refinement of NRCs to circumvent their stability challenge for their applications in high-energy LIBs. 展开更多
关键词 Ni-rich cathode Precursor treatment Multiple modification Structural refinement Structural stability Microcracks
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Editorial for the Special Issue on Sustainable and High-Performance Structural Materials 认领 引用
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作者 Qingrui Yue Surendra P.Shah Jiaping Liu 《Engineering》 SCIE EI CSCD 2026年第6期1-2,共2页
Cement-based materials and fiber-reinforced polymer(FRP)composites are fundamental material families in modern construc-tion.As structural materials,both occupy important positions in terms of global production volume... Cement-based materials and fiber-reinforced polymer(FRP)composites are fundamental material families in modern construc-tion.As structural materials,both occupy important positions in terms of global production volume,economic contribution,and carbon footprint.Cement-based materials are the most widely manufactured materials on Earth,with approximately 40 billion tonnes of cement produced annually,accounting for 7%–8%of glo-bal carbon dioxide(CO2)emissions.On the other hand,owing to unique advantages including high specific strength,excellent cor-rosion resistance,and design flexibility,FRP composites are garner-ing widespread attention in civil engineering applications.Both materials are being significantly advanced in terms of sustainabil-ity and high performance through cutting-edge studies.The key directions of recent research in this field involve simultaneously reducing embodied carbon,extending structural life,and enabling hybrid systems. 展开更多
关键词 hybrid systems fiber reinforced polymer composites structural materialsboth cement based materials structural materials sustainable materials structural life high performance materials
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Structural stability and magnetic properties of disordered SmCo7-xMx(M=metal)modulated by valence electron structure 认领 引用
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作者 Wei Liu Yongquan Guo +3 位作者 Boyang Li Yu Yao Haitao Kong Yichen Feng 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期517-523,共7页
SmCo7-xMx(M=Cu,Zr,Hf,Si,Ga)intermetallic compounds,with distinctive disordered crystal structure and excellent magnetic performance,are of great importance for application as high-temperature rare-earth permanen... SmCo7-xMx(M=Cu,Zr,Hf,Si,Ga)intermetallic compounds,with distinctive disordered crystal structure and excellent magnetic performance,are of great importance for application as high-temperature rare-earth permanent magnets.In this study,the relationship between the valence electronic structure,structural stability and magnetic and thermal properties of Sm(Co,M)7intermetallic compounds is revealed by using an empirical electron theory of solids and molecules.The structural stability is strongly related to the valence electronic structure that is modulated by doping the third element M into SmCo7.The calculated bond lengths,magnetic moments and Curie temperatures show good agreement with experimental ones.The magnetic moment and Curie temperature strongly depend on the number of 3d magnetic electrons,and can be modulated by mutual electron transformation between 3d magnetic electron and covalence electron. 展开更多
关键词 Sm(Co,M)7 pseudo-binary intermetallics valence electron structure structural stability magnetic property
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Microstructural modification of Sm2Co17-type magnets by addition of TiO2 powder to enhance mechanical properties 认领 引用 被引量：1
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作者 Lei Wang Hao Wang +9 位作者 Qiangfeng Li Chao Wang Meng Zheng Yifei Bi Boxi Zhang Hang Zhao Youhao Liu Yikun Fang Xiaofei Yi Wei Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期240-248,共9页
The mechanical properties of Sm2Co17 magnets are improved by introducing oxide powders.However,there is a trade-off between the mechanical and magnetic properties.It is important to explore an oxide powder that ... The mechanical properties of Sm2Co17 magnets are improved by introducing oxide powders.However,there is a trade-off between the mechanical and magnetic properties.It is important to explore an oxide powder that effectively improves the mechanical properties while avoiding more introduced nonmagnetic elements.TiO2 is a candidate because it is more reducible than Sm2O3 an d Ti in it is in +4 valence state.In this work,a small amount(0.08 wt%-0.38 wt%) of fine TiO2 powers(average powder size is~0.2 μm) were introduced into the magnets.The fracture mechanism of TiO2-added magnets is still brittle cleavage fracture.With TiO2 addition of 0.08 wt%,the maximum energy product(BH)max of the magnet is more than 218 kJ/m3,and the coercivity Hcj is larger than 2290 kA/m.More impressively,the maximum flexural strength of the magnets is improved by 37% compared to the original magnet.The introduced TiO2 is reduced by Sm in the magnet to form Ti and Sm2O3 at sintering.Ti is uniformly distributed in the matrix.The newly-formed Sm2O3 particles and the ones from the unavoidable oxidation during the preparation process are mainly distributed on the grain boundaries.Th e particles refine the grains by the Zener pinning effect Thus,the flexural strength of magn et is im proved.Furtherm ore,with the TiO2 addition up to 0.38 wt%,the mean grain size decreases by about 36.9%.However,the flexural strength is not further improved significantly.The evolution of the flexural strength is expected to be associated with the larger cellular structure sizes and the increased number of Sm2O3 aggregation zones.The results provide a new perspective and inspiration for enhancing the mechanical properties of Sm2Co17-type magnets. 展开更多
关键词 Sm2Co17-type magnets TiO2powder Grain refinement Cellular structure Flexural strength Rare earths
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HERO(Hessian-Engineered Relaxation Optimizer):Suppressing“Hessian Pollution”for Accelerated First-Principles Structural Relaxation 认领 引用
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作者 Mingzhe Li Piao Ma +2 位作者 Limin Li Weijie Yang Hao Li 《Computers, Materials & Continua》 SCIE EI 2026年第7期266-277,共12页
Structural optimization is a fundamental step in density functional theory(DFT)calculations,typically driven by the Broyden-Fletcher-Goldfarb-Shanno(BFGS)optimizer.However,the standard BFGS algorithm relies on a local... Structural optimization is a fundamental step in density functional theory(DFT)calculations,typically driven by the Broyden-Fletcher-Goldfarb-Shanno(BFGS)optimizer.However,the standard BFGS algorithm relies on a local quadratic approximation of the potential energy surface(PES),which frequently breaks down in highly non-quadratic regimes typical of complex surface adsorption systems and defective bulk materials.This breakdown leads to“Hessian pollution”,a phenomenon where higher-order anharmonicities introduce spurious off-diagonal inter-atomic couplings that distort curvature estimates and significantly stall convergence.Herein,we propose a physics-inspired algorithmic intervention to the BFGS method that systematically suppresses this pollution.Once the maximum residual force drops below a specific activation threshold(e.g.,0.5 or 0.1 eV/Å),our approach conditionally resets all off-diagonal Hessian blocks,and introduces an isotropic background stiffness strategy where these blocks can be repopulated with a small positive constant rather than zeroed completely.This balances the robust stability of diagonal dominance with accelerated convergence speed.Implemented as an add-on to the Atomic Simulation Environment(ASE)Library,the method is lightweight,transferable,and compatible with standard DFT codes.Tests across diverse chemical systems,including atomic and molecular adsorbates(O*,H*,CO*)on Pt(111)surfaces and defective bulk oxides(WO3-x),demonstrate substantial reductions in the number of required force calls without biasing the final optimized geometry.It offers a practical tool for high-throughput DFT workflows that eliminates the need for domain-specific training.This method is available via our open-source package,Hessian-Engineered Relaxation Optimizer(HERO). 展开更多
关键词 Hessian-engineered relaxation optimizer density functional theory(DFT) structural optimization BFGS algorithm hessian pollution structural relaxation
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Structural chromosome variations from Jinmai 47 and Jinmai 84 affected agronomic traits and drought tolerance of wheat 认领 引用
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作者 Shuwei Zhang Jiajia Zhao +9 位作者 Haiyan Zhang Duoduo Fu Ling Qiao Bangbang Wu Xiaohua Li Yuqiong Hao Xingwei Zheng Zhen Liang Zhijian Chang Jun Zheng 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第3期864-878,共15页
Structural variation is an important source of genetic variation in wheat and have been important in the evolution of the wheat's genome.Few studies have examined the relationship between structural variations and... Structural variation is an important source of genetic variation in wheat and have been important in the evolution of the wheat's genome.Few studies have examined the relationship between structural variations and agronomy and drought tolerance.The present study identified structural chromosome variations(SCVs)in a doubled haploid(DH)population and backcross introgression lines(BC5F3)derived from Jinmai 47 and Jinmai 84 using fluorescence in situ hybridization(FISH).There are one simple translocation,10 present/absent variations(PAVs),and one copy number variation(CNV)between Jinmai 47 and Jinmai 84,which distributed in 10 chromosomes.Eight SCVs were associated with 15 agronomic traits.A PAV recombination occurred on chromosome 2A,which was associated with grain number per spike(GNS).The 1BL/1RS translocation and PAV.2D were associated with significant reductions in plant height,deriving from the effects on LI2-LI4,LI2-LI4 and UI,respectively respectively.PAV.2D was also contributed to an increase of 3.13%for GNS,1BL/1RS significantly increased spikelet number,grain length(GL),and grain thickness(GT).The effect of PAV.4A.1 on GL,PAV.6A on spike length(SL)and thousand-grain weight(TGW),PAV.6B on SL,GT and TGW were identified and verified.PAVs on chromosomes 2A,6A,1D,2D,and a CNV on chromosome 4B were associated with the drought tolerance coefficients.Additive and interaction effects among SCVs were observed.Many previously cloned key genes and yield-related QTL were found in polymorphic regions of PAV.2B,PAV.2D,and CNV.4B.Altogether,this study confirmed the genetic effect of SCVs on agronomy and drought tolerance,and identification of these SCVs will facilitate genetic improvement of wheat through marker-assisted selection. 展开更多
关键词 wheat structural chromosome variation agronomy drought tolerance effect
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Realization of Polytype Heterostructures via Delicate Structural Transitions from a Doped Mott Insulator 认领 引用
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作者 Yanyan Geng Manyu Wang +9 位作者 Shumin Meng Shuo Mi Chang Li Huiji Hu Jianfeng Guo Rui Xu Fei Pang Wei Ji Weichang Zhou Zhihai Cheng 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期118-135,共18页
Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling pha... Transition-metal dichalcogenides hosting multiple competing structural and electronic phases are thus ideal platforms for constructing polytype heterostructures with emergent quantum properties.However,controlling phase transitions to form diverse heterostructures inside a single crystal remains challenging.In this study,we realize vertical/lateral polytype heterostructures in a hole-doped Mott insulator via thermal annealing-induced structural transitions.Raman spectroscopy,atomic force microscopy and scanning Kelvin probe force microscopy confirm the coexistence of T-H polytype heterostructures.Atomic-scale scanning tunneling microscopy/spectroscopy measurements reveal the transparent effect in 1H/1T vertical heterostructures,where positive bias voltage induces in a pronounced superposition of the√13×√13 CDW of the 1T-layer on the 1H-layer.By systematically comparing the 1T/1H and 1T/1T interfaces,we demonstrate that the metallic 1H-layer induces a Coulomb screening effect on the 1T-layer,suppressing the formation of CDW domain walls and forming more ordered electronic states.These results clarify the interfacial coupling between distinct quantum many-body phases and establish a controllable pathway for constructing two-dimensional polytype heterostructures with tunable electronic properties. 展开更多
关键词 Raman spectroscopy polytype heterostructures structural electronic phases spectroscopyatomic force microscopy thermal annealing structural transitions emergent quantum propertieshowevercontrolling phase transitions constructing polytype heterostructures
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Influence of silicon ion implantation on the morphological features,structural properties,optical,and electrical behavior of CR-39 polymers 认领 引用
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作者 Bashir S Ahmad S +3 位作者 Ali N Umm-i-Kalsoom Rafique M S Husinsky W 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第7期516-526,共11页
The variations in morphological features,structural properties,optical characteristics,and electrical behavior induced by 610-keV Si ions in the CR-39 matrix have been investigated in the current research work.Polymer... The variations in morphological features,structural properties,optical characteristics,and electrical behavior induced by 610-keV Si ions in the CR-39 matrix have been investigated in the current research work.Polymer targets were irradiated with Si ions for various fluences spanning from 5×1013ions/cm2 to 35×1016ions/cm2.The implantation of ions in the polymeric target generally leads to chain scission,bond breaking,and cross-linking,along with the formation of free radicals and ions.To confirm these effects,various characterization techniques have been utilized.Optical microscopy reveals the creation of micro-cavities and cracks along the grain boundaries.Confocal microscopy demonstrates the formation of micro-sized hillocks.The formation of SiC phase at 890 cm-1following ion implantation was identified by Raman spectroscopy.Furthermore,in CR-39,a significant reduction in optical transmittance in the visible region is attributable to the formation of Si and carbonaceous clusters on the target surface.The enhancement in the electrical conductivity of the Si ion implanted polymer with an increase in ion fluence is attributable to fine crystallinity and the development of SiC bridges.The assessed temperature of the surface of the implanted polymer ranges from 2.2×104K to 6.2×104K.The LET(total linear energy transfer)value of 610-keV implanted ions and their depth are 63 eV/Å and 1.11µm recorded in CR-39,respectively,estimated by SRIM simulation.The improved morphological features,structural properties,optical characteristics,and electrical behavior of CR-39 make it beneficial for applications in packaging and electronic industries,medical sciences,and photonic devices. 展开更多
关键词 surface morphology carbonaceous clusters optical transmittance structural modification
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Structural Influence on Radiation-induced Single-event Effects in SiC MOSFETs:Comparative Analysis of Planar and Trench Designs 认领 引用
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作者 HU Libin FENG Shaohui +7 位作者 SUI Chenglong WANG Chengjie CHEN Miao LU Peng YANG Can SHU Lei LU Jiang LI Bo 《原子能科学技术》 EI CAS CSCD 北大核心 2026年第3期745-751,共7页
The single-event susceptibility of three silicon carbide(SiC)metal-oxide-semiconductor field-effect transistor(MOSFET)power devices structures(planar,trench and double trench)is researched by the technology computer-a... The single-event susceptibility of three silicon carbide(SiC)metal-oxide-semiconductor field-effect transistor(MOSFET)power devices structures(planar,trench and double trench)is researched by the technology computer-aided design(TCAD)simulation.Comparative analysis of the heavy-ion irradiation effects on three device structures reveals distinct susceptibility characteristics.The gate oxide region is identified as the most sensitive position in planar devices,while trench and doubletrench structures exhibit no localized sensitive regions.Furthermore,the single-event susceptibility demonstrates strong depth dependence across all three structures,with enhanced vulnerability observed at greater ion penetration depths. 展开更多
关键词 SiC MOSFET single-event susceptibility different structures TCAD simulation
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Information Security with Smart Hydrogels: Photo-Patterning and Multi-Stimuli Responsive Structural Color 认领 引用
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作者 Xiaoyu Guo Ying Li +5 位作者 Farzana Hanif Linhai Zhu Miao Kong Shufen Zhang Yuang Zhang Bingtao Tang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期420-434,共15页
Photonically structured colors, characterized by high resolution and dynamic responsiveness, hold promising prospects in the field of information security. However, conventional patterning methods are often limited by... Photonically structured colors, characterized by high resolution and dynamic responsiveness, hold promising prospects in the field of information security. However, conventional patterning methods are often limited by high equipment costs and monotonous color outputs, which restrict their widespread adoption. To address these issues, this paper proposes a novel multi-color patterning method based on light-induced chemical crosslinking. By introducing light-initiated crosslinking molecules into anti-opal hydrogels, we developed a film that can be further regulated by photo-curing, enabling a “film formation first, then patterning” approach. The structural color hydrogels created using this method can display multi-color patterns, with a minimum line width of 15 μm, significantly enhancing their information-carrying capacity. Moreover, ultraviolet radiation can increase the degree of cross-linking, thereby inhibiting swelling behavior, enhancing tensile strength, reducing elongation at break, and causing the color of the inverse opal structure to shift toward blue or disappear. With inherent responsiveness to stress, temperature, and solvents, this approach enables dynamic information display and has excellent stability(able to cycle stably for more than 100 times). This work introduces a new method for patterning stimulus-responsive structural colors and opens up new possibilities for their use in applications such as ink-free printing, information encryption, and anti-counterfeiting. 展开更多
关键词 Structural color Anti-opal hydrogel Light-induced crosslinking Information security
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Effect mechanisms of activators on the electrolyte performance of solid waste structural supercapacitors 认领 引用
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作者 Wenjing SUN Zhuofan ZHANG +5 位作者 Yue E MIAO Shuang LU Xue JIANG Xiaowei GU Xiating FENG Xunchang FEI 《ENGINEERING Structure and Civil Engineering》 SCIE EI CAS CSCD 2026年第6期1125-1141,共17页
Utilizing steel slag and granulated blast furnace slag,this study prepared solid waste electrolyte(SWE)for green building components integrating load-bearing and energy storage functions.However,simultaneously achievi... Utilizing steel slag and granulated blast furnace slag,this study prepared solid waste electrolyte(SWE)for green building components integrating load-bearing and energy storage functions.However,simultaneously achieving high ionic conductivity and compressive strength remains challenging.Salt activators(4%Na/K2SiO3,Na/K2SO4),alkali activators(4%Na/KOH),and combined activators(2%+2%)were employed to clarify activator effects on performance.Ionic conductivity and compressive strength were measured,and microstructures were characterized by thermogravimetric analysis,scanning electron microscopy,and mercury intrusion porosimetry.Results showed that activators significantly improved SWE performance.The combined activators 2%K2SO4+2%KOH exhibited optimal overall performance(19.89 mS·cm−1 and 16.15 MPa).K activation exhibited higher ionic conductivity than Na activation,whereas salt activation showed greater strength than alkali activation.Microstructural analysis indicated that activators promoted hydration,reduced porosity,and optimized pore size distribution.A synergistic influence was identified:porosity determines ion-accessible volume and microstructural compactness,whereas pore size distribution reflects the size and efficiency of ion-transport pathways and microstructural uniformity.Specifically,pores of 50–200 nm mainly contribute to ion transport,while pores>200 nm mainly affect strength.Thus,reducing porosity and optimizing pore size distribution are crucial for simultaneously improving conductivity and strength of SWE. 展开更多
关键词 activators SWE ionic conductivity compressive strength hydration reaction pore structure
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Stand structural attributes exert stronger and scale-dependent control on forest biomass than tree diversity across typical forest ecosystems in China 认领 引用
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作者 Yonghong Zhang Honglin He +5 位作者 Liang Shi Josep Peñuelas Jordi Sardans Yijing Bai Chenxi Li Jiuying Pei 《Plant Diversity》 SCIE CAS CSCD 2026年第3期598-607,共10页
Understanding how biodiversity-ecosystem functioning(BEF)relationships scale spatially and temporally remains critical under global change.Here,using continuous monitoring databases across temperate,subtropical and tr... Understanding how biodiversity-ecosystem functioning(BEF)relationships scale spatially and temporally remains critical under global change.Here,using continuous monitoring databases across temperate,subtropical and tropical natural forests in China from 2004 to 2020,we quantified multiscale tree diversity-biomass dynamics.Linear mixed-effect and structural equation models were used to further disentangle the direct and indirect pathways through which tree diversity influences forest biomass at different scales.The results revealed significant positive linear relationships between tree species richness and stand biomass at 1200 and 400 m² scales(P0.05).Notably,these demonstrated relationships exhibited consistent temporal stability across all spatial scales throughout the study period.Importantly,the direct effect of tree diversity on biomass intensified with increasing spatial scale,while indirect effects mediated through stand structural attributes(CV_DBH and tree density)became proportionally stronger at finer scales.Further analyses showed that stand structural attributes emerged as the strongest predictor of biomass variation across all scales,surpassing both diversity and climate effects.Furthermore,spatial variation of climate factors(mean annual temperature and mean annual precipitation)mainly affected stand biomass through the indirect effects on tree species diversity and stand structural attributes.Overall,multiscale analyses revealed stand structural attributes dominates biomass prediction,with climate acting indirectly.Scaling biodiversity-structure strategies can enhance forest resilience under global change.Future work should integrate cross-scale mechanisms into climate-smart afforestation for sustainable carbon sequestration. 展开更多
关键词 Forest ecosystem Species richness Stand structure Biomass Spatial scale Succession
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Computational Analysis of Autonomous Underwater Vehicles(AUVs)Structural Dynamics and Impact Forces During High Speed Water Entry 认领 引用
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作者 YU Yi-lan PAN Guang +1 位作者 SHI Yao HUANG Qiao-gao 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期507-520,共14页
Understanding the structural response of Autonomous Underwater Vehicles(AUVs)during water entry is essential for ensuring operational safety and reliability.This paper introduces a bidirectional fluid-structure coupli... Understanding the structural response of Autonomous Underwater Vehicles(AUVs)during water entry is essential for ensuring operational safety and reliability.This paper introduces a bidirectional fluid-structure coupling numerical algorithm to analyze the structural response characteristics of an AUV during water entry at various speeds and angles.The numerical method’s accuracy is verified through experimental data.The investigation focuses on the water entry process within the velocity range of 50 to 200 m/s and entry angles between 60°and 90°.The study examines the influence of structural position,entry velocity,and entry angle on the structural response,while analyzing stress and strain at specific locations on the circular end face,cylindrical side,and circular tail surface of the AUV.The findings demonstrate that at entry speeds exceeding 100 m/s,the structure undergoes strain,with entry velocity exhibiting a more pronounced effect on axial force compared with entry angle.A reduced entry angle decreases the initial water contact duration and minimizes stress concentration.These results provide significant theoretical foundations for AUV structural design. 展开更多
关键词 AUV structural dynamics stress propagation water entry transmedia FSI
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Structural transformation of hexagonal birnessite as an indicator of environmental impact:The role of thallium interaction pathways,pH,and illumination 认领 引用
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作者 Tianqiang Zhu Wen Zhuang +2 位作者 Feng Li Liwen Zheng Jihua Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期85-94,共10页
Thallium(Tl) is a highly toxic trace metal,is present in various environments,such as soils,waters,and sediments.Hexagonal birnessites(HB),naturally occurring minerals,significantly influence metal geochemical cycling... Thallium(Tl) is a highly toxic trace metal,is present in various environments,such as soils,waters,and sediments.Hexagonal birnessites(HB),naturally occurring minerals,significantly influence metal geochemical cycling due to their strong ability to adsorb and oxidize toxic metals.Understanding the transformation mechanisms of HB into tunnel structures is crucial for predicting their impact on Tl's environmental fate.This study investigated the reactions between Tl(Ⅰ) and acidic birnessite(AcBi),a common form of HB,under different conditions.Tl(Ⅰ) was added to AcBi systems either as a single dose or in twelve equal increments across a pH range of 2 to 6,under both light and dark conditions.Continuous Tl(Ⅰ) additions at pH 4 transformed over 90 % of AcBi into a 2 × 2tunnel structure,while at pH 6,53 %-75 % transformed.At pH 2,intense proton competition inhibited structural reconfiguration.Single dose addition caused minor structural changes at pH 4 and none transformation at pH2 or 6.Illumination accelerated transformations,likely through photoinduced electron transfers.The oxidation state and adsorption coordination of Tl varied with mineral structure:Tl(Ⅲ) was predominantly found in layered structures,while dehydrated Tl(Ⅰ) dominated in tunnel structures,which retained Tl less effectively.These findings offer new insights into the environmental behaviors of these substances and informs strategies to manage thallium pollution. 展开更多
关键词 Thallium(Tl) Manganese oxide Birnessite Adsorption Redox Structural transformation
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Brittle Structural Control and Fluid Progress of the Jinqingding Gold Deposit: Implications for Epizonal Gold Mineralization 认领 引用
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作者 Xiaohu Wang Yuke Shen +8 位作者 Changshan Wei Fengbin Han Tao Guo Huisheng Wang Jiantao Yu Yubo Song Bo Wang Longji Gong Guijie Li 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2026年第3期781-794,共14页
The Jinqingding gold deposit in eastern Jiaodong is a significant gold mineralization within the Muping-Rushan metallogenic belt.This study integrates structural analysis and trace element geochemistry of sulphides to... The Jinqingding gold deposit in eastern Jiaodong is a significant gold mineralization within the Muping-Rushan metallogenic belt.This study integrates structural analysis and trace element geochemistry of sulphides to elucidate ore-controlling mechanisms and metallogenic models.The deposit occurs as pyrite-quartz veins and polymetallic sulphide veins/disseminations hosted in biotite monzonitic granite,controlled by the NNE-striking Jiangjunshi-Quhezhuang fault.Structural analysis reveals that mineralization was controlled by conjugate shear joints,tension fractures,and enéchelon faults formed under a tectonic stress field withσ1oriented NE-SW.LA-ICP-MS trace element analysis of pyrite reveals dual geochemical affinities—high-temperature magmatic signatures(elevated Co,Ni,Ti)and medium-low temperature hydrothermal signals(enriched As,Pb,Bi)—suggesting episodic fluid inputs from magmatic-hydrothermal and meteoric sources.Rare earth elements(REEs)are low in pyrite and show slight LREE enrichment.The results suggest that the main ore-controlling structures formed under a stress field withσ1oriented NE-SW during the Early Cretaceous,and the mineralization may be related to episodic fluid pulses,as reflected by the changes in trace elements during the crystallization of pyrite.Furthermore,this study reveals an NEE-trending set of potential ore-controlling structures for epizonal gold mineralization,which is of great significance for regional gold exploration in Jiaodong. 展开更多
关键词 Jiaodong gold deposit Jinqingding structural controls prospecting prediction pyrite geochemis
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