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Intercalation-enabled bonding design for La2Bi4Cu2Se2Te2O6with high thermoelectric performance 认领 引用 被引量：1
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作者 Pengfei Zhang Yufei Meng +7 位作者 Shulin Bai Da Wan Peng Ai Zhiwei Zhang Yunzhuo Zhang Zhanpeng Xu Yujie Bao Shuwei Tang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期243-250,I0006,共8页
Thermoelectric (TE) materials enable precise, noiseless, and moving-part-free waste heat recovery and solid-state refrigeration through the Seebeck and Peltier effects [1–3]. The efficiency of TE materials is typical... Thermoelectric (TE) materials enable precise, noiseless, and moving-part-free waste heat recovery and solid-state refrigeration through the Seebeck and Peltier effects [1–3]. The efficiency of TE materials is typically evaluated by a dimensionless figure of merit (ZT = S2σT/(κe+ κl)), which depends on the delicate interplay among the electrical conductivity (σ), Seebeck coefficient (S), lattice thermal conductivity (κl), and electronic thermal conductivity (κe) [4]. 展开更多
关键词 Intercalation strategy Interlayer static insulation Two-channel model Thermoelectric materials
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A red-emissive carbon dots-based fluorescence and colorimetric dual-mode probe for rapid and sensitive detection of perfluorooctanoic acid in environmental samples 认领 引用 被引量：1
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作者 Yongli Liu Guobei Ge +6 位作者 Huanjia Liu Yuxin Wang Penghui Zhou Xiaoyan Su Tianmiao Jin Guifen Zhu Qingxiang Zhou 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期464-472,共9页
Perfluorooctanoic acid(PFOA)is a ubiquitous persistent organic pollutant.Hence,developing effective strategies for its fast and efficient detection in environmental samples is imperative for ecological and health safe... Perfluorooctanoic acid(PFOA)is a ubiquitous persistent organic pollutant.Hence,developing effective strategies for its fast and efficient detection in environmental samples is imperative for ecological and health safety.Herein,red-emissive carbon dots(R-CDs)were innovatively fabricated and employed to construct a novel eco-friendly fluorescence and colorimetric dual-mode probe for the effective determination of PFOA.The R-CDs were sourced from meso‑tetra(4-carboxyphenyl)porphine,ethanolamine,and oxalic acid via a facile hydrothermal method.The fluorescent intensity of the R-CDs at 652 nm and the absorbance at 415 nm decreased gradually with increasing concentration of PFOA.The experimental results demonstrated the probe exhibited good linearity across PFOA concentration ranges of 1–100 ng/mL,100–900 ng/mL,and 1000–4000 ng/mL based on fluorescence quenching attributable to the static quenching.Additionally,the probe achieved high sensitivity with a detection limit as low as 0.0012 ng/mL.On the other hand,the probe could detect PFOA in the range of 1000–7000 ng/mL with a detection limit of 54.9 ng/mL according to colorimetric principle.This probe exhibited excellent reliability and satisfactory recoveries when analyzing the trace PFOA in actual water and soil samples.The proposed probe provided a simple,rapid,economical,and environmentally friendly platform for effectively,selectively,and sensitively detecting PFOA in environmental samples. 展开更多
关键词 Red-emissive CDs Perfluorooctanoic acid(PFOA) Dual-mode probe Static quenching effect Environmental samples
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Manipulating the texture configuration and formability of interstitial-free steels through low-oxygen rare earth addition 认领 引用
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作者 Peng Liu Hongliang Liu +6 位作者 Jun Liu Chaoyun Yang Hang Liu Chengwu Zheng Yikun Luan Mingguang Li Dianzhong Li 《Metals Advances》 SCIE EI CAS CSCD 2026年第2期101-109,共9页
The influences of rare earth(RE)addition on stored deformation energy and stored-energy-driven microstructure evolution as well as the resulting texture transformation of ultra-low carbon interstitial-free(IF)steels w... The influences of rare earth(RE)addition on stored deformation energy and stored-energy-driven microstructure evolution as well as the resulting texture transformation of ultra-low carbon interstitial-free(IF)steels were carefully studied in this study,to clarify the micro-alloying effect of RE elements on texture configuration and formability under the dual low-oxygen conditions of molten steel and La-Ce mischmetal.Results indicate that a trace amount of RE addition can significantly reduce the stored energy of cold-rolled IF steels by increasing sub-distorted areas within the deformed matrix.These areas,primarily dominated by the{112}deformation texture,are preferential formation sites for recrystallization γ textures,particularly for the{111}component.In the annealing process,continuous static recrystallization(CSRX)predominantly occurs in these sub-distorted regions.The time-consuming boundary transition from low-angle grain boundary(LAGB)to high-angle grain boundary(HAGB)during CSRX provides favorable time condition for the growth of{111}-oriented grains and the formation of corresponding texture.Dissolved RE elements can drag the motion of dislocations and pin the migration of boundaries,thereby significantly prolonging the occurrence time of this transition process and increasing the orientation distribution density of the{111}recrystallization texture,a phenomenon rarely observed in RE-free IF steels.As a result,the distribution density of{111}texture gradually becomes comparable to that of{111}texture,contributing to a higher plastic strain ratio increased by 16%.This work offers theoretical guidance for manipulating the texture configuration and formability of IF steels through low-oxygen RE addition. 展开更多
关键词 Rare earth addition Interstitial-free steels Static recrystallization Texture Formability
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Revisiting the Effect of Reactive Compatibilization on Polymer Crystallization:From Static Suppression to Shear-induced Promotion 认领 引用
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作者 Bao-Gou Wu Xiao-Hu Bing +4 位作者 Qian Ren Lan Ding Ji-Zhang Li Wen-Ge Zheng Long Wang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第3期756-767,I0013,共12页
Reactive compatibilization has been widely applied to enhance the compatibility of polymer blends,thereby improving their mechanical properties.However,it generally reduces the chain mobility and regularity,often lead... Reactive compatibilization has been widely applied to enhance the compatibility of polymer blends,thereby improving their mechanical properties.However,it generally reduces the chain mobility and regularity,often leading to slower polymer crystallization.Here,we demonstrate that reactive compatibilization in poly(lactic acid)/poly(butylene adipate-co-terephthalate)(PLA/PBAT)blends unexpectedly promotes PLA matrix crystallization during injection molding,in contrast to the retarded kinetics observed in differential scanning calorimetry isothermal crystallization studies.The phase morphology,rheological behavior,and crystalline structure were systematically analyzed to elucidate markedly different crystallization kinetics under static and shear fields.The potential mechanism underlying crystallization enhancement is attributed to PBAT domain refinement and viscosity increase induced by reactive compatibilization,which,under shear flow,create favorable conditions for crystallization by enhancing PBAT fibril nucleation and retarding the relaxation of oriented PLA chains.This study offers new perspectives on the effect of reactive compatibilization on the polymer crystallization behavior. 展开更多
关键词 Reactive compatibilization Crystallization Static field Shear flow field
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Buckling and parametric excitation stability optimization of fluid-conveying pipes by frequency design 认领 引用
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作者 Xiaoye MAO Kexin CHANG +3 位作者 Jie JING Tianchang DENG Hu DING Liqun CHEN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第4期675-694,共20页
A methodology is proposed to enhance the buckling and parametric excitation stability of fluid-conveying pipes by designing their natural frequencies.As a direct indicator of structural stiffness with respect to defor... A methodology is proposed to enhance the buckling and parametric excitation stability of fluid-conveying pipes by designing their natural frequencies.As a direct indicator of structural stiffness with respect to deformation,which is intrinsically related to the overall structural stability,the natural frequency is adopted as the primary design criterion for enhancing system stability.Based on the generalized Hamilton's principle,the governing equation for a multi-restrained pipe system is derived.The analysis reveals that,the natural frequencies can be maximized by appropriately selecting the constraint locations,which induces the best buckling stability.Although increasing the flow velocity generally reduces the natural frequency,the optimal constraint location remains relatively unchanged,eventually approaching the location of the maximal critical flow speed,beyond which the pipe loses its static stability.Furthermore,the proposed method introduces additional nodes into the natural mode shape,indicating that a higher energy threshold is required to trigger the resonance.Consequently,the parametric resonance under pulsating flow conditions becomes more difficult to initiate.Meanwhile,with the frequency design,the pipe can prevent the occurrence of parametric resonance with smaller critical damping.Compared with other approaches aimed at enhancing the stability of fluid-conveying pipe systems,the proposed method offers greater practicality for engineering applications,as it only requires adjusting the constraint locations and the optimal location is insensitive to the flow speed. 展开更多
关键词 fluid-conveying pipe frequency design static bifurcation stability of parametric resonance optimal stability
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Advancements and theoretical foundations of cable-driven parallel robots:A comprehensive overview 认领 引用
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作者 Kamran Joyo Han Yuan +2 位作者 Jun Wu Wenfu Xu Honghao Yue 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2026年第3期280-305,共26页
Parallel robotic mechanisms using cables instead of rigid limbs are termed cable-driven parallel robots(CDPRs).Electric motors and pulley mechanisms actuate cables to provide motion for an end-effector in a cable robo... Parallel robotic mechanisms using cables instead of rigid limbs are termed cable-driven parallel robots(CDPRs).Electric motors and pulley mechanisms actuate cables to provide motion for an end-effector in a cable robot.Consequently,CDPRs have emerged as indispensable tools across a spectrum of industrial and technological domains,including astronomy,aerospace,logistics,simulators,and rehabilitation.Their inherent compatibility with the evolving concept of rigid-flexible fusion places CDPRs at the forefront of cutting-edge robotics research.This comprehensive paper aims to consolidate the core theories and advancements underpinning CDPRs,en-compassing key aspects such as configuration design,cable-force distribution,workspace and stiffness analysis,performance evaluation,optimisation techniques,and motion control.We provide in-depth insights into kine-matic modelling,workspace exploration,and cable-force solutions.Furthermore,the paper delves into the in-tricacies of stiffness and dynamic modelling,presenting a range of analytical methods to elucidate their effects on CDPR performance.Addressing reliability concerns and developing a unified control framework are identified as essential in ensuring the practical deployment of CDPRs in real-world scenarios.This research paper offers a comprehensive overview of the theories and advancements in CDPRs,identifying critical areas for further re-search and development to unlock the full potential of these versatile and high-performance robotic systems. 展开更多
关键词 Cable-driven parallel robots Optimisation Path generation Statics Machine learning
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Energy absorption mechanism and design method of anchor cable under dynamic-static coupling condition 认领 引用
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作者 Qi Wang Jingxuan Liu +4 位作者 Mingzi Wang Bei Jiang Rugang Duan Shuo Xu Xuepeng Wang 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第5期941-956,共16页
To effectively control the large deformation of the surrounding rock under complex conditions,it is often necessary to apply prestress to anchor cables.However,due to the influence of surrounding rock deformation,mini... To effectively control the large deformation of the surrounding rock under complex conditions,it is often necessary to apply prestress to anchor cables.However,due to the influence of surrounding rock deformation,mining disturbance,and strong impact,anchor cables are often in a dynamic and static coupling stress state.Therefore,it is crucial to study the dynamic and static coupling mechanical characteristics of anchor cables.Based on this,the self-developed dynamic and static coupling test equipment is developed.The dynamic and static coupling mechanical test of anchor cables is conducted.Test results indicate that the energy absorption for anchor cables under the initial load of 350 kN decreased by 69.8%compared to the condition without initial load,and the energy absorption efficiency increased by 6.6 times.The increase of initial load can improve its energy absorption efficiency,but it can also lead to a decrease in its energy absorption.The energy absorption and energy absorption efficiency shows a bilinear variation law with the increase of initial load.On this basis,the energy absorption calculation formula and the support design model of the anchor cable are established.It provides new ideas for the safety control of dynamic disasters in deep engineering. 展开更多
关键词 Anchor cable support Working load Dynamic and static coupling test Energy absorption characteristics Design method
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Effect of percussive massage treatment and static stretching on muscle tone,stiffness,and strength recovery after exercise-induced muscle fatigue:A randomized controlled study 认领 引用
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作者 Gangrui Chen Zhongke Gu +2 位作者 Dongling Xin Yuxuan Qi Jiansong Dai 《Sports Medicine and Health Science》 CAS CSCD 2026年第5期524-530,共7页
The aim of this study was to compare the effects of percussive massage treatment and static stretching on muscle tone,stiffness,and strength recovery following exercise fatigue.Sixty subjects were randomly divided int... The aim of this study was to compare the effects of percussive massage treatment and static stretching on muscle tone,stiffness,and strength recovery following exercise fatigue.Sixty subjects were randomly divided into three groups:a control group(CG,n=20),a static stretching group(SSG,n=20),and a percussive massage treatment group(PMTG,n=20).Following exercise-induced muscle fatigue,interventions were applied,including supine rest,static stretching,and percussive massage treatment.Muscle tone,stiffness,and muscle strength indicators were assessed at five time points:before the exercise(Pre-exercise),immediately after exercise(Post-exercise),immediately after therapy intervention(Post-0),24 hours(h)after therapy intervention(Post-24 h),and 48 h after therapy intervention(Post-48 h).Results:At Post-0,muscle tone and stiffness in both the control group and static stretching group were significantly higher than Pre-exercise,while in the percussive massage treatment group,there were no statistically significant differences compared to Pre-exercise.At Post-48 h,peak torque in the control group was significantly lower than Pre-exercise.In contrast,the percussive massage treatment group and static stretching group showed no significant differences at Post-48 h compared to Pre-exercise.These findings indicated that percussive massage therapy is immediately effective in mitigating muscle tone and stiffness after exercise fatigue,whereas static stretching and percussive massage therapy facilitate the recovery of muscle strength within 48 h. 展开更多
关键词 Percussive massage therapy Static stretching Muscle tone and stiffness Muscle strength
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Three-step formation of diamonds in shock-compressed hydrocarbons:Dissociation,species separation,and nucleation 认领 引用
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作者 Bo Chen Qiyu Zeng +4 位作者 Xiaoxiang Yu Jiahao Chen Shen Zhang Dongdong Kang Jiayu Dai 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第1期58-67,共10页
The accumulation and circulation of carbon and hydrogen contribute to the chemical evolution of ice giant planets.Species separation and diamond precipitation have been reported in carbon-hydrogen systems and have bee... The accumulation and circulation of carbon and hydrogen contribute to the chemical evolution of ice giant planets.Species separation and diamond precipitation have been reported in carbon-hydrogen systems and have been verified by static and shock compression experiments.Nevertheless,the dynamic formation processes underlying these phenomena remain insufficiently understood.In combination with a deep learning model,we demonstrate that diamonds form through a three-step process involving dissociation,species separation,and nucleation processes.Under shock conditions of 125 GPa and 4590 K,hydrocarbons decompose to give hydrogen and low-molecular-weight alkanes(CH4 and C2H6),which escape from the carbon chains,resulting in C/H species separation.The remaining carbon atoms without C-H bonds accumulate and nucleate to form diamond crystals.The process of diamond growth is associated with a critical nucleus size at which the dynamic energy barrier plays a key role.These dynamic processes of diamond formation provide insight into the establishment of a model for the evolution of ice giant planets. 展开更多
关键词 diamond formation formation processes ice giant planetsspecies separation dissociation deep learning modelwe carbon hydrogen static shock compression experimentsneverthelessthe chemical evolution
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A Novel Segment-switching Strategy with the Current Transient Overshoot Suppression for Segmented Long-stator Linear Motor 认领 引用
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作者 Yanfei Li Zixin Li +4 位作者 Hang Zhang Fei Xu Cong Zhao Fanqiang Gao Yaohua Li 《CES Transactions on Electrical Machines and Systems》 EI CSCD 2026年第2期188-203,共16页
The segmented power supply scheme for long-stator linear motor facilitates reducing power capacity and achieving a high power factor.However,the segment-switching process leads to overcurrent under high-speed conditio... The segmented power supply scheme for long-stator linear motor facilitates reducing power capacity and achieving a high power factor.However,the segment-switching process leads to overcurrent under high-speed conditions.This paper proposes a novel segment-switching strategy based on the time-optimal control theory.It employs time-optimal feedforward voltage and planned current trajectory during the switching transient process.Thus,it ensures rapid disconnection of the exiting segment and rapid establishment of the current in the incoming segment,while suppressing transient current overshoot.The mathematical model of the long-stator linear motor is established in the process of segment-switching.It derives the minimum times required to force the exiting segment current to zero and to establish the incoming segment current to the reference value by time-optimal control theory.Furthermore,the time-optimal voltages and current trajectories are calculated.The timeoptimal current trajectories are used as the reference command for the current loop.The time-optimal feedforward voltages are introduced into the current loop control.Hence,it achieves rapid disconnection of the exiting segment and fast,accurate establishment of the incoming segment current.Experimental and simulation results collectively validate the effectiveness of the proposed segment-switching strategy. 展开更多
关键词 Long-stator linear motor Segmented power supply Segment switching Longitudinal static end-effect Timeoptimal control
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Empowering PV system modeling and forecasting:a review of public benchmark datasets 认领 引用
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作者 Bochao Zhao Yaqing Wang +1 位作者 Wenpeng Luan Hanju Cai 《Global Energy Interconnection》 EI CSCD 2026年第2期219-242,共24页
Driven by the high penetration of renewable energy,the inherent intermittency of photovoltaic(PV)generation poses severe challenges to grid stability.To manage this volatility and ensure reliable grid integration,prec... Driven by the high penetration of renewable energy,the inherent intermittency of photovoltaic(PV)generation poses severe challenges to grid stability.To manage this volatility and ensure reliable grid integration,precise PV system modeling and power forecasting have emerged as critical solutions.However,existing research predominantly focuses on algorithmic innovations and model architectures,frequently overlooking the foundational role of dataset selection.Because capturing the complex spatiotemporal dynamics of solar generation increasingly requires the integration of diverse data types,understanding how to select and fuse these multimodal sources is crucial for determining the upper bound of predictive performance.To address the persistent fragmentation of data resources in PV predictive modeling,this paper delivers a comprehensive taxonomy of publicly available benchmark datasets,establishing a roadmap for future data-driven research.We categorize these valuable resources into three core pillars:1)meteorological datasets(encompassing observational,synthetic,hybrid,and reanalysis types);2)PV generation datasets(grouped by temporal resolution);and 3)static system parameters(including plant-level geospatial data and module-level physical properties).Building upon this categorization,this review thoroughly examines multimodal data fusion strategies across various forecasting horizons and elucidates the specific data dependencies of persistence,physical,and data-driven modeling paradigms.Furthermore,we critically analyze key challenges in multi-source data fusion,particularly spatiotemporal misalignment and the lack of standardized quality control flags.Ultimately,this work provides researchers with an authoritative guide for robust data selection and model construction. 展开更多
关键词 PV system modeling PV forecasting Meteorological datasets PV generation datasets Static system parameters
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Static softening mechanisms and recrystallization kinetics of martensitic heat-resistant steel 40Cr10Si2Mo in double-pass thermal deformation 认领 引用
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作者 Tong-Yao Yang Qing-Juan Wang +2 位作者 Zhong-Ze Du Jing Yang Zhi-Meng Yan 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第1期210-227,共18页
Single-pass and double-pass high-temperature deformation experiments were conducted on 40Cr10Si2Mo steel using a Gleeble-3500 thermal simulator.The static recrystallization(SRX)behavior and recrystallization mechanism... Single-pass and double-pass high-temperature deformation experiments were conducted on 40Cr10Si2Mo steel using a Gleeble-3500 thermal simulator.The static recrystallization(SRX)behavior and recrystallization mechanisms of 40Cr10Si2Mo steel were investigated under deformation temperatures of 900-1100℃,deformation strains of 10%,20%,and 30%,and inter-pass times of 1-120 s.A static recrystallization fraction model was developed.The results showed that the SRX volume fraction increased with higher deformation temperature,larger deformation amount,and longer inter-pass time,with the deformation temperature having the most significant effect on SRX.During the deformation process,different process parameters led to different internal deformation mechanisms of the material.Static recovery and continuous static recrystallization(CSRX)dominated deformation at lower temperatures through progressive lattice rotation.In comparison,at higher temperatures,the deformation mechanism was dominated by CSRX and discontinuous static recrystallization(DSRX).The nucleation mechanisms of the SRX process were grain boundary bulging nucleation and subgrain merging nucleation,with grain boundary bulging present under all conditions.Subgrain merging nucleation could provide an additional nucleation mode at lower deformation temperatures or lower deformation amounts.Based on the traditional Avarmi equation,a modified model coefficient was used to establish the SRX kinetic model for 40Cr10Si2Mo steel.The linear correlation coefficient R2 between the predicted and experimental static recrystallization volume fraction was 0.96702,indicating high prediction accuracy. 展开更多
关键词 40Cr10Si2Mo steel Double-pass hot deformation Static softening Recrystallization mechanism Recrystallization kinetics
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Effectiveness of large-diameter combined tip-and-side post-grouted piles in deep fine sand layers:A field test study 认领 引用
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作者 Zhihui Wan Zilong Guo +1 位作者 Guoliang Dai Feng Zhou 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第5期3819-3831,共13页
This study investigates the effectiveness of combined tip-and-side post-grouting on large-diameter bored piles in deep fine sand layers.Field tests were conducted on nine piles for the Shishou Yangtze River Highway Br... This study investigates the effectiveness of combined tip-and-side post-grouting on large-diameter bored piles in deep fine sand layers.Field tests were conducted on nine piles for the Shishou Yangtze River Highway Bridge project.A detailed comparison of pile performance pre-and post-grouting assessed the technique's influence on ultimate bearing capacity and side resistance.The distribution and effectiveness of the cement grout were analysed using core drilling and the standard penetration test(SPT).An equation correlating post-grouting side resistance with the pre-grouting SPT index(NSPT)was established.Results demonstrate a substantial improvement in pile bearing capacity after grouting.Ultimate bearing capacity increased by 76%–152%after grouting.Longer piles on the main bridge exhibited more pronounced enhancement,achieving ultimate capacities 145%–206%higher than those of the shorter approach bridge piles.This is attributed to the greater total cement volume applied along their sides.Critically,combined grouting outperformed side-only grouting,enhancing both side and tip resistance.Core drilling confirmed the spread of cement grout around the piles,confirming the method's effectiveness.SPT results indicated significant increases in the soil NSPT adjacent to the piles following grouting.These findings provide directly applicable data for designing the bridge pile foundations and offer essential guidance for comparable projects in deep fine sand layers. 展开更多
关键词 Bored pile Combined post-grouting Static load test Core drilling test Standard penetration test(SPT) Deep fine sand layer
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Experimental Study of Mechanical Properties and Recovery Properties of Shape Memory Alloy Hybrid Composites under Static Bending 认领 引用
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作者 LI Xiao-bin ZHAO Zhe-ji +3 位作者 LI Meng-zhen ZHANG Yi-heng CHEN Wei LI Chun-bao 《船舶力学》 EI CSCD 北大核心 2026年第6期957-969,共13页
To enhance the bending mechanical properties of fiber-reinforced plastics(FRP)and address rapid damage repair under multiple bending loads,an improved shape memory alloy hybrid composite(ISMAHC)was developed by embedd... To enhance the bending mechanical properties of fiber-reinforced plastics(FRP)and address rapid damage repair under multiple bending loads,an improved shape memory alloy hybrid composite(ISMAHC)was developed by embedding layered orthogonal shape memory alloy(SMA)wires into FRP.Three-point bending and water bath recovery tests were performed on traditional single-layer unidirectional SMA hybrid composites(SMAHC),ISMAHC and FRP.The effects of layered orthogonal SMA configuration on stiffness,strength,and recovery capability were compared and investigated.Results demonstrate that SMA wires form a coupling effect with FRP,increasing the bending modulus.Furthermore,ISMAHC has higher stiffness due to its orthogonal architecture.The water bath recovery tests indicate that SMAHC and ISMAHC possess good deflection recoverability and mechanical property recoverability after multiple bending loadings.The deflection recovery rate of the first bending test is greater than 60%,and that of the second bending test is greater than 30%.Additionally,the bending modulus and bending strength recover more than 30%,with ISMAHC showing superior recoverability. 展开更多
关键词 shape memory alloy hybrid composites recovery properties mechanical properties static bending
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Hexagonal diamond formation mechanism:A review 认领 引用
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作者 Tao Yu Shengcai Zhu 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第3期1-12,共12页
As a metastable carbon allotrope,hexagonal diamond(HD)exhibits potentially superior mechanical properties to cubic diamond(CD).However,its synthesis faces significant thermodynamic and kinetic challenges.This review s... As a metastable carbon allotrope,hexagonal diamond(HD)exhibits potentially superior mechanical properties to cubic diamond(CD).However,its synthesis faces significant thermodynamic and kinetic challenges.This review summarizes the critical role of computational simulations in the synthesis of HD,covering both static calculations and molecular dynamics(MD)simulations.Static calculations reveal that graphite tends to transform into CD under interface-free conditions,whereas the presence of an interface results in a lower energy barrier for the HD phase transition.With regard to MD simulations,while early shock compression simulations failed to observe HD formation,recent studies based on neural network potentials have confirmed a shock-velocity-dependent transformation pathway and have successfully obtained HD,consistent with in situ experimental results.Hydrostatic pressure simulations emphasize the importance of controlling interlayer sliding,demonstrating that strategies such as quasi-uniaxial compression can promote the preferential formation of HD.In the future,the integration of high-precision simulations with experimental approaches is expected to enable the controllable synthesis of HD,thereby advancing its applications in ultrahard materials,power electronics,aerospace,and other fields. 展开更多
关键词 metastable carbon allotropehexagonal diamond hd exhibits molecular dynamics computational simulations static calculations hexagonal diamond cubic diamond cd howeverits shock compression
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Structural Damage Diagnosis Based onMulti-Stage Sparrow Search Algorithm 认领 引用
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作者 Lijun Yang Qiuwei Yang 《Computers, Materials & Continua》 SCIE EI 2026年第9期2449-2468,共20页
This study proposes a Multi-Stage Sparrow Search Algorithm(MS-SSA)for precise structural damage identification.Initially,the structural static displacement sensitivity formulation is derived via the Sherman-Morrison-W... This study proposes a Multi-Stage Sparrow Search Algorithm(MS-SSA)for precise structural damage identification.Initially,the structural static displacement sensitivity formulation is derived via the Sherman-Morrison-Woodbury formula,and an objective function is constructed by integrating the sensitivity equations with the L2-norm penalty.Subsequently,MS-SSA is implemented to sequentially achieve preliminary damage localization and accurate quantification.In the localization phase,a constrained narrow-bound search space is predefined to identify potential damage regions.Leveraging this feedback,the sensitivity equations are condensed,and the search boundaries are adaptively refined for the quantification phase,where SSA is reapplied to precisely determine damage severity while mitigating misjudgments.TheMS-SSA framework exhibits two distinct advantages:(i)Phase I localization accelerates convergence by constraining the search space,as it does not target precise quantification;and(ii)the significant reduction in unknowns achieved by excluding intact elements in Phase II enables rapid convergence to the global optimum.Comparative studies against the GreyWolf Optimizer(GWO),Whale Optimization Algorithm(WOA),and standard SSA demonstrate that the proposed method effectively overcomes computational instability,slowconvergence,and large errors inherent in swarm intelligence optimization for damage identification.Specifically,numerical case studies reveal that the identification error is reduced to merely 9%~22%of that associated with existing methods,with experimental validation confirming reductions to 18%~22%.Overall,the proposed approach achieves high-fidelity damage identification while eliminating false positives and false negatives. 展开更多
关键词 Damage diagnosis static displacement sensitivity Sparrow Search Algorithm(SSA) narrow search range
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Punching in Fiber-Reinforced,Net-Reinforced,and Unreinforced Concrete Slabs under Static,Impulsive,and Thermal Loading 认领 引用
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作者 Roberto Felicetti Pietro G.Gambarova Francesco Lo Monte 《Structural Durability & Health Monitoring》 EI 2026年第3期95-124,共30页
Many tests have been conducted over the years in Milan on moderately-thick concrete slabs—with diameter-to-thickness ratios of 5 and 5.5—either reinforced or unreinforced,all subjected to punching,with different mix... Many tests have been conducted over the years in Milan on moderately-thick concrete slabs—with diameter-to-thickness ratios of 5 and 5.5—either reinforced or unreinforced,all subjected to punching,with different mixes,reinforcement technologies,and loading procedures.Their results are revisited systematically in this paper,starting from a thorough review of the literature on moderately thick concrete slabs.The specimens were either square(but fastened to a circular support)or circular.In three experimental campaigns,99 specimens were tested:50 under quasi-static loading(including 16 exposed to high temperatures)and 49 under impulsive loading.The first campaign investigated concrete slabs reinforced with polyacrylonitrile fibers,steel fibers,or steel nets,focusing on their deformed shapes and failure modes under quasi-static punching.The second campaign examined the effects of high temperatures on unreinforced and net-reinforced slabs subjected to quasi-static punching,while the third campaign focused on the failure modes and energy issues of fiber-reinforced slabs under impulsive punching.Polyacrylonitrile fibers increase punching resistance under impact,but change the failure mode from mixed(bending+punching)to pure punching.Steel nets increase slab ductility more than steel fibers,while high temperatures promote a shift from bending-controlled to shear-controlled failure modes.The main contributions of the test results are:(a)the varying degree of softening in the slab’s response to punching due to the formation of either small or large punching cones;(b)the reduction in bearing capacity with increasing temperature,which occurs more in net-reinforced than in fiber-reinforced slabs;and(c)the different contributions to the total dissipated energy under impact,resulting from the formation of bending-related cracks and of the punching cone.Overall,this work aims to highlight general trends in slab behavior under punching loads in different conditions,using highly idealized tests(as often done in labs),that provide a basic representation of actual punching scenarios. 展开更多
关键词 Concrete slabs steel nets polymeric/steel fibers static/impulsive punching high temperatures failure modes energy balance(in slab punching)
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Mesoscopic mechanism of shear breakdown and static recovery characteristics of waxy crude oil gel structures 认领 引用
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作者 Li-Ping Guo Jia-Jun Zhang +2 位作者 Lei Wang Rui Chen Bao-Jun Liu 《Petroleum Science》 SCIE EI CAS CSCD 2026年第6期3634-3646,共13页
The primary method for transporting high-wax crude oil is heated pipeline transmission.During shutdowns,the gelled state and structural strength of the congealed oil directly determine the restart pressure required fo... The primary method for transporting high-wax crude oil is heated pipeline transmission.During shutdowns,the gelled state and structural strength of the congealed oil directly determine the restart pressure required for pipeline resumption,with wax crystals being the dominant internal factor.This study employs synchronized macro-meso rheological measurements to systematically investigate the continuous evolution of wax crystal morphology during network formation,s hear-induced yielding,and static recovery,while analyzing the effects of shear cycles and rate.Results indicate that during the isothermal gelation stage after cooling,continuous precipitation,growth,and aggregation of wax crystals lead to significant changes in mesoscopic characteristic parameters(2.60%-45.17%).In the initial shearing stage,the wax crystal network sequentially undergoes yield deformation,fragmentation,and eventually reaches a dynamic equilibrium state where deformation,fragmentation and reaggregation coexist.With increasing shear cycles,wax crystals experience more thorough fragmentation,developing a denser and more uniform spatial distribution with their shapes tending toward sphericity.During the subsequent static recovery stage,only partial fragmented wax crystals undergo re-adsorption and aggregation,resulting in limited changes in characteristic parameters(0.27%-9.84%).Higher shear rates increase the yield stress and shorten the yielding time,while reducing both the equilibrium stress value and structu ral parameters,simultaneously exacerbating irreversible damage to the wax crystal netwo rk and inhibiting the recovery capability of the gelled structure.This study elucidates the correlation mechanism between mesostructural evolution of wax crystals and macroscopic rheological behavior during shear-recovery processes,providing theoretical foundations for addressing complex engineering challenges in pipeline restart operations. 展开更多
关键词 Waxy crude oil Wax crystal morphology Mesoscopic mechanism Shearing Static recovery
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The influence of alloying on recrystallization behavior and texture development of Mg-(Ca,Zn)alloys 认领 引用
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作者 Rogine A.Gomez Daniel P.Veghte +2 位作者 David J.Rowenhorst Bruce W.Williams Aeriel D.Murphy-Leonard 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期176-201,共26页
The influence of alloying Mg with Ca and Zn on the microstructural and texture evolution of binary Mg-2Zn(wt.%)and Mg-0.5Ca(wt.%)during static recrystallization(SRX)was systematically quantified using in situ techniqu... The influence of alloying Mg with Ca and Zn on the microstructural and texture evolution of binary Mg-2Zn(wt.%)and Mg-0.5Ca(wt.%)during static recrystallization(SRX)was systematically quantified using in situ techniques.In situ heating experiments were conducted inside of a scanning electron microscopy(SEM)equipped with an electron backscatter diffraction(EBSD)detector and a heating stage to track the nucleation and growth of strain-free grains throughout the entire annealing process.This enabled the sequential mapping of specific regions of interest throughout the recovery and recrystallization processes.In Mg-2Zn,deformation was accommodated mainly through extension{1012}twinning and{1011-1012}and{1013-1012}double twinning.These twin interfaces and twin nucleation sites along grain boundaries served as preferential sites for the nucleation of recrystallized grains.Additionally,the deformed texture was retained even after recrystallization due to the new grains inheriting the orientation of the twinned grains.In Mg-0.5Ca,multiple twinning systems were activated such as extension{1012}twinning,{1011}and{1013}contraction twinning,and{1011-1012}and{1013-1012}double twinning.Contraction and double twins served as preferred nucleation sites for recrystallized grains due to the higher strain energy generated within these regions.With more nucleation sites available within the Mg-0.5Ca microstructure,the resulting recrystallized crystallographic orientation exhibited a weaker texture compared to Mg-2Zn. 展开更多
关键词 Mg-Zn alloy Mg-Ca alloy Static recrystallization Multiscale characterization Electron microscopy
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Quantitative analysis of static yield stress variation in thickened tailings within the compaction zone based on fine structure 认领 引用
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作者 Cuiping Li Gezhong Chen +4 位作者 Zhu’en Ruan Raimund Bürger Bingheng Yan Chen Hu Xue Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第4期1067-1081,共15页
The poor flowability of high-concentration tailings slurry often leads to slurry hardening and rake blockages in thickeners.To address this,the study employed computed tomography and rheological measurement techniques... The poor flowability of high-concentration tailings slurry often leads to slurry hardening and rake blockages in thickeners.To address this,the study employed computed tomography and rheological measurement techniques to investigate the effect of slurry concentration on static yield stress(τB),and a comparative analysis was conducted between thickened tailings and freshly mixed slurry.Results show that the concentration,coarse particle content,and pore structure of thickened tailings are nonhomogeneous.Slurry concentration and the proportion of coarse particles(75–300μm)increase with decreasing slurry height,while pores in the 50–250-μm range serve as the primary storage space for water.TheτB of thickened tailings is 5.3–61.3 times higher than that of freshly mixed slurry.Furthermore,τB decreases with decreasing coefficient of variation(CV)of slurry porosity.It is proposed to use CV to quantify differences inτB between thickened tailings and freshly mixed slurry.Field application at an iron ore mine in China validated the results,providing insights to mitigate slurry hardening in silos. 展开更多
关键词 tailings thickening static yield stress particle gradation pore-network model slurry flowability
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