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A Cross-lagged Panel Analysis of Sleep and Behavioral Problems in Children and Adolescents with Overweight and Obesity 认领 引用
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作者 Dongmei Wang Wanling Zhang +5 位作者 Hui Xu Na Hu Xiao Leng Aihua Wang Di Wu Ying Li 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2026年第6期736-741,共6页
The global incidence of pediatric obesity has increased rapidly over the past few decades.Scientific evidence has repeatedly shown that behavioral and emotional challenges are frequently observed in children with over... The global incidence of pediatric obesity has increased rapidly over the past few decades.Scientific evidence has repeatedly shown that behavioral and emotional challenges are frequently observed in children with overweight or obesity[1-2],as evidenced by a landmark case-control design study revealing that obese children have 7.15 times higher odds of developing mental health disorders in adolescence than their normal-weight peers[1]. 展开更多
关键词 adolescents obesity sleep mental health disorders children behavioral emotional challenges behavioral problems overweight
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Cariprazine modulates affective and social behaviors through ventral striatal islands of Calleja neurons 认领 引用
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作者 Zhangwei Song Wenqiang Wang +4 位作者 Haiping Wang Yanbiao Zhong Guanqing Li Ruiyi Tan Yun-Feng Zhang 《Current Zoology》 SCIE CAS CSCD 2026年第2期198-210,共13页
Cariprazine,a dopamine D2/D3 receptor partial agonist with high affinity for D3 receptors,is effective in treating bipolar disorder and depression;however,the precise neural mechanisms underlying its actions remain in... Cariprazine,a dopamine D2/D3 receptor partial agonist with high affinity for D3 receptors,is effective in treating bipolar disorder and depression;however,the precise neural mechanisms underlying its actions remain incompletely understood.This study investigates how cariprazine modulates affective and social behaviors through D3 neurons in the olfactory tubercle(OT).Local infusion of cariprazine specifically into the OT,but not the nucleus accumbens(NAc)or hippocampus,induced anxiety-like behaviors,impaired struggling behaviors in depression-related tests,and increased huddling behavior,a measure of thermoregulation and social interaction.These behavioral changes were associated with decreased D3 neuronal activity in the OT,as evidenced by whole-cell patch-clamp recordings.Optogenetic activation of OT D3 neurons normalized cariprazine-induced anxiety-like behaviors and blunted the increase in struggling and huddling behavior.Additionally,cariprazine administration elevated body temperature,likely due to enhanced huddling behavior.These findings underscore the critical role of OT D3 neurons in mediating cariprazine’s effects on affective and social behaviors,providing new insights into the neural mechanisms underlying its therapeutic actions and the involvement of ventral striatal D3 neurons in neuropsychiatric disorders. 展开更多
关键词 affective behaviors cariprazine D3 neurons olfactory tubercle social behaviors
Correction: Optimizing Exciton and Charge-Carrier Behavior in Thick-Film Organic Photovoltaics: A Comprehensive Review 认领 引用
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作者 Lu Wei Yaxin Yang +2 位作者 Lingling Zhan Shouchun Yin Hongzheng Chen 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第1期608-608,共1页
Correction to:Nano-Micro Letters(2026)18:10.http://gffzzd3cc09b8251d45dfsnufu9uo0xc0k69bk.ffgz.tsg.suse.edu.cn/10.1007/s40820-025-01852-8 Following publication of the original article[1],the authors reported that the last author’s name was inadvertently misspelled.Th... Correction to:Nano-Micro Letters(2026)18:10.http://gffzzd3cc09b8251d45dfsnufu9uo0xc0k69bk.ffgz.tsg.suse.edu.cn/10.1007/s40820-025-01852-8 Following publication of the original article[1],the authors reported that the last author’s name was inadvertently misspelled.The published version showed“Hongzhen Chen”,whereas the correct spelling should be“Hongzheng Chen”.The correct author name has been provided in this Correction,and the original article[1]has been corrected. 展开更多
关键词 charge carrier behavior exciton behavior comprehensive review thick film organic photovoltaics nano micro letters
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Behavioral innovation correlates with broader climatic niche breadths in birds 认领 引用
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作者 Xuyu Wang Chuan Yan +1 位作者 Ferran Sayol Jiani Chen 《Avian Research》 SCIE CAS CSCD 2026年第3期641-652,共12页
Behavioral innovation,defined as the ability to exhibit novel behaviors that may contribute to problem-solving and adaptability,has been increasingly recognized as a key factor in species'resilience to environment... Behavioral innovation,defined as the ability to exhibit novel behaviors that may contribute to problem-solving and adaptability,has been increasingly recognized as a key factor in species'resilience to environmental shifts.Here we investigate the association between behavioral innovation and climatic niche breadths(the range of climatic conditions a species can tolerate)across 9338 bird species,representing the majority of extant birds,exploring its potential role in coping with climatic variability.We quantified climatic niches using highresolution spatial and bioclimatic data to capture both species-overall extremes and among-locality variations.By using Bayesian Phylogenetic Generalized Linear Mixed Models,we analyzed correlations between these realized climatic niche breadths and two metrics of behavioral innovation—innovativeness(the propensity to exhibit novel behaviors)and innovation rate(the frequency of such behaviors)—while incorporating ecological and life-history traits as covariates.Innovativeness significantly correlates with broader climatic niche breadths for both temperature and precipitation.In contrast,innovation rate shows only a positive association with precipitation niche breadth and no significant correlation with any temperature niche metrics.Our findings reveal that while innovativeness significantly correlates with broader climatic niche breadths in birds,further variation in climatic niche breadth among innovative species is minimally associated with their innovation rates.This relationship is linked to a distinct spatial pattern:for temperature,innovative species exhibit broader niches alongside both wider within-locality tolerance and greater variation among localities;for precipitation,broader niches are associated primarily with greater variation among localities,despite having narrower within-locality niches.These results highlight that integrating innovativeness into climate vulnerability assessments could better capture resilience,complementing established predictors. 展开更多
关键词 Adaptation Behavioral innovation Behavioral plasticity Climate change Climatic niche Climate resilience
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Tourists’environmentally responsible behavior under the mind-body dualism:The moderating role of daily green behavior 认领 引用
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作者 WANG Yao WANG Jin +2 位作者 HE Biao XING Xin-yu WU Hui-hui 《Ecological Economy》 2026年第2期153-171,共19页
Relying on resource endowments,the tourism industry has achieved large-scale and high-quality development,becoming an important engine for regional economic growth.However,the agglomeration and expansion of tourist fl... Relying on resource endowments,the tourism industry has achieved large-scale and high-quality development,becoming an important engine for regional economic growth.However,the agglomeration and expansion of tourist flows,the disorderly construction of tourism facilities,and the excessive development of tourism activities have also brought significant stress to the ecological environment and resource carrying capacity of the destination,exacerbating the vulnerability of the ecosystem and the pressure of environmental governance.Based on the attitude-context-behavior theory,this study examines behavioral differences between tourists'habitual and non-habitual locations.Data were gathered via questionnaires,and structural equation modeling was used to assess the effects of tourist involvement,psychological distance,place attachment,and environmental attitudes.Results show tourist involvement affects environmentally responsible behavior more than psychological distance,indicating behavior is mainly influenced by explicit factors.The mediating effect of environmental attitudes was stronger than place attachment,suggesting attitude impacts environmental responsibility more than affective cognition.Differences in place attachment and environmental attitudes were influenced by dairy green behaviors,indicating geographical differences significantly affected behavior. 展开更多
关键词 environmentally responsible behavior psychological distance tourist involvement daily green behavior dualistic behavior theory
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Flag-waving behavior in matador bugs is an antipredatory strategy 认领 引用 被引量：1
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作者 Connor Evans-Blake Juliette J.Rubin Ummat Somjee 《Current Zoology》 SCIE CAS CSCD 2026年第2期293-302,共10页
To dissuade predator attack,animals may advertise their chemical defense with bright coloration and specialized behaviors.However,these antipredator adaptations can be costly,if they unnecessarily draw attention to th... To dissuade predator attack,animals may advertise their chemical defense with bright coloration and specialized behaviors.However,these antipredator adaptations can be costly,if they unnecessarily draw attention to the prey animal.Thus,animals with elaborate antipredator traits may be under pressure to selectively increase advertisement of their defenses in particular contexts.The matador bug,Bitta alipes(Hemiptera:Coreidae),possesses large,colorful flags on its hind tibia that it uses in a stereotypic“waving”behavior.Previous research found no evidence that this waving behavior is employed in social or sexual interactions.Here,we experimentally tested for a potential antipredator function of flag waving by exposing a matador bug to either an arthropod predator(praying mantid)or a similarly sized nonpredatory arthropod(nonpredatory katydid).In total,we recorded 2,938 leg waves among 25 individuals.We found that matador bugs’waving behavior increased in duration,frequency(number of wave bouts),and intensity(number of waves per bout)in the presence of praying mantids.Notably,we found on average a 7-fold increase in the number of waves in the presence of a mantid relative to a similarly sized nonpredatory arthropod.Praying mantids consumed very few matador bugs(3/25)and never attacked bugs that were waving,lending support to the hypothesis that flags serve an antipredator function in matador bugs.We find similar flag-waving behavior in at least 5 closely-related flag-legged bug species,all of which have expanded tibial flags with contrasting coloration and are Passiflora specialists,providing opportunities for future studies to examine the evolution of elaborate flag-waving behavior as an antipredator behavior in this group. 展开更多
关键词 antipredator behavior behavioral plasticity Bitta alipes conspicuous signaling Coreidae facultative defense
Does digital literacy promote climate disaster-adaptive production behaviors among grain-producing smallholders in China? 认领 引用 被引量：1
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作者 Qingyun Bai Jiajia Li +3 位作者 Jian Zhang Dungang Zang Kuan Zhang Qianling Shen 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第6期2214-2228,共15页
Climate disasters lead to substantial economic losses and grain yield losses,emphasizing the need for adaptation to ensure food security.As digital technologies advance,it is imperative to investigate how digital lite... Climate disasters lead to substantial economic losses and grain yield losses,emphasizing the need for adaptation to ensure food security.As digital technologies advance,it is imperative to investigate how digital literacy among grain farmers affects their adaptive production behaviors in the face of climate disasters.Drawing on survey data from 505 grain-producing smallholders in Sichuan Province,China,this study constructs a theoretical framework linking digital literacy,climate disaster risk perception,and adaptive production behaviors.Empirical analysis shows that digital literacy positively impacts the adaptive production behaviors of grain-producing smallholders.Our results are robust across various models and tests.An analysis of the mediation mechanism reveals that digital literacy contributes to climate disaster-adaptive production behaviors by improving the awareness of climate disaster risks.Heterogeneity analysis shows that the positive impact of digital literacy is more pronounced for smallholders that receive internet skills training and climate information services,and this impact intensifies as the level of agricultural infrastructure improves.The findings suggest that digital literacy plays a key role in reducing production risks,thereby contributing to increased sustainable agricultural development among smallholders. 展开更多
关键词 digital literacy climate disaster-adaptive production behaviors grain-producing smallholders China
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Effects of Temperature,Loading Frequency,Stress Amplitude,and Stress Ratio on the Low-Cycle Fatigue Behavior of FeMnSiCrNi Shape Memory Alloys 认领 引用 被引量：1
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作者 Bo Xu Beihai Huang +4 位作者 Sen Tang Xiang Xu Huabei Peng Chong Wang Qingyuan Wang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2026年第2期133-151,共19页
FeMnSi-based shape memory alloys(SMAs)have great applied potential to large-scale structures in civil engineering,especially as an aseismic structural material.Low-cycle fatigue performance is one of the most importan... FeMnSi-based shape memory alloys(SMAs)have great applied potential to large-scale structures in civil engineering,especially as an aseismic structural material.Low-cycle fatigue performance is one of the most important properties of FeMnSi-based SMA aseismic materials.However,the low-cycle fatigue behavior of such SMAs,especially the stress-controlled low-cycle fatigue behavior(with ratchetting effect),has not been clearly understood.In this work,the low-cycle fatigue behavior of the FeMnSiCrNi SMAs subjected to stress-controlled cyclic tension–compression loads is investigated,and the effects of temperature,loading frequency,stress amplitude,and stress ratio are addressed.By analyzing the cyclic stress–strain response,fatigue fracture surface morphology,dissipation energy,ratchetting strain,and equivalent damping ratio,the mechanisms behind the temperature-,loading frequency-,stress amplitude-,and stress ratio-dependent low-cycle fatigue behavior are discussed.The results show that the plasticity,martensitic transformation,and/or the ratchetting strain caused by their tension–compression asymmetry are the decisive factors affecting the low-cycle fatigue behavior of FeMnSiCrNi SMAs. 展开更多
关键词 FeMnSiCrNi shape memory alloy Low-cycle fatigue behavior Temperature Loading frequency Stress amplitude Stress ratio
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Stress-rupture behavior of a Ni-based Re-containing single crystal superalloy in[001]and[111]orientations at 1100℃ 认领 引用 被引量：1
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作者 Guang-lei Wang Dong-qing Qi +1 位作者 Jin-lai Liu Ji-de Liu 《China Foundry》 SCIE EI CAS CSCD 2026年第2期179-185,共7页
Turbine blades,due to their intricate geometry,are exposed to multiaxial stresses during operation.Consequently,it is imperative to examine the anisotropy of their stress-rupture behavior across various testing scenar... Turbine blades,due to their intricate geometry,are exposed to multiaxial stresses during operation.Consequently,it is imperative to examine the anisotropy of their stress-rupture behavior across various testing scenarios,particularly under high-temperature conditions.Stress-rupture behavior of a Ni-based single crystal superalloy was investigated under a load varying from 100 MPa to 137 MPa at 1,100℃ for both[001]-and[111]-orientated specimens.Results demonstrate that the rupture behavior of[111]-orientated specimens exhibits obviously higher sensitive to applied stress compared to[001]-orientated specimens.This difference is primarily attributed to the orientation dependentγ'coarsening behavior and distinct dislocation interactions atγ/γ'interfaces.In[001]-oriented specimens,plate-likeγ/γ'rafts rapidly form alongside well-developed interfacial dislocation networks,where theγ/γ'misfit stress dominates the microstructural evolution.In contrast,the[111]-orientated specimens exhibit retained,coarsenedγ'precipitates embedded within theγmatrix,accompanied by poorly developed interfacial dislocation networks. 展开更多
关键词 Ni-based single crystal superalloy stress-rupture behavior deformation mechanism stress dependence orientation dependence
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Amelioration of behavioral and neural deficits in animal models of neurodegenerative disease by nanoformulations of curcumin and quercetin 认领 引用 被引量：2
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作者 Bridget Martinez Philip V.Peplow 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第8期3311-3322,共12页
Neurodegenerative diseases are increasing in prevalence due largely to aging populations worldwide and improved medical care for the elderly.Currently approved drugs can reduce some of the symptoms of neurodegenerativ... Neurodegenerative diseases are increasing in prevalence due largely to aging populations worldwide and improved medical care for the elderly.Currently approved drugs can reduce some of the symptoms of neurodegenerative diseases but cannot cure them.Inflammation is involved in the development and progression of neurodegenerative diseases,and oxidative stress is implicated in neurodegeneration associated with cognitive decline and age-related cognitive impairment.Polyphenols such as curcumin,quercetin,and resveratrol possess potent anti-inflammatory and antioxidant properties.Nanoformulations of curcumin and quercetin can optimize their pharmacological effects in the treatment of neurodegenerative diseases.Nanocarriers play a crucial role in delivering drugs across the blood-brain barrier,thereby lowering the risk of peripheral side effects.Various nanoforms have been developed to induce bioavailability and solubility of curcumin and quercetin,including nanoparticles and nanoemulsions.The studies reviewed included 17 using curcumin nanoformulations and seven with quercetin nanoformulations and were tested in widely used animal models of Alzheimer’s disease,Parkinson’s disease,Huntington’s disease,and multiple sclerosis.Many of the curcumin and quercetin nanoformulations brought about improvements in learning and memory in behavioral tests of Alzheimer’s disease models and were effective in reducing oxidative stress in the brain.Both nanocurcumin and nanoquercetin decreased the levels of inflammatory markers in the brain.Nanocurcumin formulations improved motor behavior,gait,and memory in Parkinson’s disease models and increased dopaminergic neurons in the striatum and substantia nigra.Furthermore,nanocurcumin improved locomotor activity,memory,and learning,and the number of dendrites of medium spiny neurons in Huntington’s disease models.Nanocurcumin formulations decreased oxidative stress and inflammation in a model of demyelination.Several important limitations were identified in the studies reviewed and these need to be considered in future studies.Also,clinical trials could be performed using the currently available nanoforms of curcumin and quercetin. 展开更多
关键词 animal models behavioral deficits curcumin inflammation nanoformulations neural deficits neurodegeneration oxidative stress quercetin
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Dynamic behavior of steel post/wood panel railway noise barriers under aerodynamic loads induced by high-speed trains 认领 引用 被引量：1
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作者 Dongyun Liu Chao Wang +3 位作者 Jaime Gonzalez-Libreros Andréas Andersson Lennart Elfgren Gabriel Sas 《Railway Engineering Science》 EI 2026年第1期55-84,共30页
Railway noise barriers are an essential piece of infrastructure for reducing noise propagation.However,these barriers experience aerodynamic loads generated by high-speed trains,leading to dynamic effects that may com... Railway noise barriers are an essential piece of infrastructure for reducing noise propagation.However,these barriers experience aerodynamic loads generated by high-speed trains,leading to dynamic effects that may compromise their fatigue capacity.The most common structural design for railway noise barriers consists of vertical configurations of posts and panels.However,there have been few dynamic analyses of steel post/wood panel noise barriers under train-induced aerodynamic loads.This study used dynamic finite element analysis to assess the dynamic behavior of such noise barriers.Analysis of a 40-m-long noise barrier model and a triangular simplified load model,the latter of which effectively represented the detailed aerodynamic load,were first used to establish the model and input of the moving load during dynamic simulation.Then,the effects of different parameters on the dynamic response of the noise barrier were evaluated,including the damping ratio,the profile of the steel post,the span length of the panel,the barrier height,and the train speed.Gray relational analysis indicated that barrier height exhibited the highest correlations with the dynamic responses,followed by train speed,post profile,span length,and damping ratio.A reduction in the natural frequency and an increase in the train speed result in a higher peak response and more pronounced fluctuations between the nose and tail waves.The dynamic amplification factor(DAF)was found to be related to both the natural frequency and train speed.A model was proposed showing that the DAF significantly increases as the square of the natural frequency decreases and the cube of the train speed rises. 展开更多
关键词 Aerodynamic load Dynamic amplification factor Dynamic behavior Finite element analysis High-speed train Railway noise barrier
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ASYMPTOTIC BEHAVIOR AND PARAMETER ESTIMATION OF A WEIGHTED SELF-REPELLING DIFFUSION DRIVEN BYα-STABLE MOTION 认领 引用
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作者 Yinmeng CHEN Xiaoyu XIA Litan YAN 《Acta Mathematica Scientia》 SCIE CSCD 2026年第4期1945-1956,共12页
Let Mα={Mtα,t≥0}be anα-stable motion on R with 00.Whenθ>0 and 1/β+1<a<2,we show that the convergence Jtα(0,θ,β):=(1+t)βe-G(t)Xtα→ξ∞α+ν/θand Jtα(n,θ,β... Let Mα={Mtα,t≥0}be anα-stable motion on R with 00.Whenθ>0 and 1/β+1<a<2,we show that the convergence Jtα(0,θ,β):=(1+t)βe-G(t)Xtα→ξ∞α+ν/θand Jtα(n,θ,β):=θ(1+t)β+1(Jtα(n-1,θ,β)λn-1(ξ∞α+ν/θ))→λn(t→∞)hold almost surely for all n≥1,where G(t)=∫0tθ(1+s)βds,ξ∞α=∫0∞(1+s)βe-G(s)d Msαandλn=β(2β+1)...(nβ+n-1).Using least squares method,we study estimators ofθandνand give their asymptotic distributions. 展开更多
关键词 asymptotic behavior least squares method stable motion weighted self repelling diffusion parameter estimation large time behaviors
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Diverse Behavior Path Graphs for Multi-Behavior Recommendation 认领 引用
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作者 Qian Hu Lei Tan +2 位作者 Qingjun Yuan Zong Zuo Yan Li 《Computers, Materials & Continua》 SCIE EI 2026年第6期674-696,共23页
Multi-behavior recommendation methods leverage various types of user interaction behaviors to make personalized recommendations.Behavior paths formed by diverse user interactions reveal distinctive patterns between us... Multi-behavior recommendation methods leverage various types of user interaction behaviors to make personalized recommendations.Behavior paths formed by diverse user interactions reveal distinctive patterns between users and items.Modeling these behavioral paths captures multidimensional behavioral features,which enables accurate learning of user preferences and improves recommendation accuracy.However,existing methods share two critical limitations:(1)Lack of modeling for the diversity of behavior paths;(2)Ignoring the impact of item attribute information on user behavior paths.To address these issues,we propose a Directed Behavior path graph-based Multi-behavior Recommendation method(DBMR).Specifically,we first construct a directed user-item behavior path graph based on diverse behavior chains.For each behavior,we then build a user-item interaction graph and use a LightGCN model with residual design to learn user and item embeddings.Next,we introduce a graph attention message aggregator that integrates features from previous behaviors into the learning of the next behavior,weighted by the transition strength between behaviors.Finally,we compute the recommendation score from the user preference and item representations under the target behavior.We adopt a joint optimization framework with a multi-task learning strategy,which accounts for each auxiliary behavior’s contribution to target behavior prediction.Additionally,an auxiliary loss measures the difference between item embeddings from behavior paths and those from an attribute-feature encoder,thereby capturing multidimensional item features and refining recommendation results.Experiments on two real-world datasets demonstrate the effectiveness of our method in utilizing multi-behavior data. 展开更多
关键词 Multi-behavior recommendation diverse behavior path graphs joint optimization graph attention networks
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Associations of Suicidal Behaviors with Physical Activity Types and Psychosocial Factors among Korean Adolescents:A Secondary Data Analysis 认领 引用
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作者 Chae-Young Lee Yun-Jung Choi 《International Journal of Mental Health Promotion》 2026年第3期82-98,共17页
Background:Adolescent suicide remains a pressing public health concern in South Korea and worldwide,ranking as one of the leading causes of death among youth.Identifying modifiable risk and protective factors is criti... Background:Adolescent suicide remains a pressing public health concern in South Korea and worldwide,ranking as one of the leading causes of death among youth.Identifying modifiable risk and protective factors is critical for prevention strategies.Physical activity has been suggested as one such factor due to its potential mental health benefits.This study aimed to examine whether associations between physical activity and suicidality differ by activity type and by stage of suicidal behavior,distinguishing suicidal ideation,planning,and attempts among Korean adolescents.Methods:This cross-sectional secondary analysis used data from the 20th Korea Youth Risk Behavior Web-based Survey(KYRBS)conducted in 2024,a nationally representative survey of Korean adolescents.The study included 54,653 middle and high school students with complete data on physical activity,suicidal ideation,planning,and attempts.Three types of physical activity(vigorous activity,muscle-strengthening activity,and≥60 min of daily physical activity)were examined.Associations with suicidal behaviors were analyzed using multivariable logistic regression models,adjusting for psychological,behavioral,and sociodemographic covariates.Results:In this nationally representative sample of Korean adolescents,engaging in at least 60 min of daily physical activity was significantly associated with lower odds of suicide planning,but not ideation or attempts.In contrast,muscle-strengthening activity was linked to increased odds of both suicide planning and attempts,whereas vigorous activity showed no significant associations.Psychological factors,including generalized anxiety,sadness,stress,and loneliness,showed strong associations with suicidal behaviors and were included as covariates in the adjusted models.Female students,low academic performance,and unstable residential status were also associated with higher odds of suicidal behaviors.Conclusion:The associations between physical activity and suicidality differed by activity type and suicidal outcome;muscle-strengthening activity was positively associated with suicide planning and attempts in adjusted models. 展开更多
关键词 Adolescent suicide physical activity mental health Korea Youth Risk Behavior Survey musclestrengthening exercise suicide behavior
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Shear behavior and microstructural evolution of Malan loess under climate-induced wetting and drying cycles 认领 引用
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作者 Pengju Qin Hongrui Guo +3 位作者 Yanrong Li Jun Zhang Yu Lu Yifei Sun 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期2122-2141,共20页
Loess landslides are major hazards in the Chinese Loess Plateau(CLP).The loess in this region is frequently subjected to repeated wetting–drying(W-D)cycles due to climatic factors,which significantly increases the li... Loess landslides are major hazards in the Chinese Loess Plateau(CLP).The loess in this region is frequently subjected to repeated wetting–drying(W-D)cycles due to climatic factors,which significantly increases the likelihood of landslides.Therefore,investigating the shear behavior and microstructural evolution of loess under climate-induced W-D cycles is crucial to understanding the mechanisms of loess landslides.In this study,Malan loess is analyzed using unsaturated triaxial tests,resistivity tests,scanning electron microscopy,and mercury intrusion porosimetry.The test results show that shear strength decreases with increased W-D cycles,and the degradation effect is more pronounced under lower confining pressure.The variations in conductive pathways indicate that electrical resistivity can effectively reflect the structural damage of loess during W-D cycles,which is associated with increased direct point contacts and spaced pores.Aggregation of clay particles and growth of cracks during the W-D cycles can further destabilize the loess microstructure.As the confining pressure increases,crushed particles rearrange and convert spaced pores into intergranular pores.The number and peak intensity of dominant spaced pores decrease,resulting in a more stable structure.This study clarifies the mechanisms of loess landslides under W-D cycles and provides theoretical support for landslide prevention and control in the CLP. 展开更多
关键词 Loess Wetting-drying cycles Electrical resistivity Shear behavior Microstructure
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Effect of Initial Microstructure States on Flow Behavior of Al-Zn-Mg-Cu Alloy During Hot Tensile Deformation 认领 引用
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作者 Wang Shuyan Zhou Yuting +3 位作者 Du Ruibo Long Shuai Lin Haitao Wang Shaoyang 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第2期302-314,共13页
To investigate the influence of Al-Zn-Mg-Cu alloy with as-homogenized and as-rolled initial microstructures on the tensile flow behavior,isothermal tensile tests were conducted on a GLEEBLE-3500 isothermal simulator a... To investigate the influence of Al-Zn-Mg-Cu alloy with as-homogenized and as-rolled initial microstructures on the tensile flow behavior,isothermal tensile tests were conducted on a GLEEBLE-3500 isothermal simulator at temperatures of 380-440℃and strain rates of 0.05-1 s−1.The Johnson-Cook model,Hensel-Spittel model,strain-compensated Arrhenius model,and critical fracture strain model were established.Results show that through the evaluation of the models using the correlation coefficient(R)and the average absolute relative error,the strain-compensated Arrhenius model can represent the flow behavior of the alloy more accurately.Shear bands are more pronounced in the as-homogenized specimens,whereas dynamic recrystallization is predominantly observed in as-rolled specimens.Fracture morphology analysis reveals that a mixed fracture mechanism is prevalent in the as-homogenized specimen,whereas a ductile fracture mechanism is predominant in the as-rolled specimen.The processing maps indicate that the unstable region is reduced in the as-rolled specimens compared with that in the as-homogenized specimens.The optimal hot working windows for the as-homogenized and as-rolled specimens are determined as 410-440℃/0.14-1 s−1and 380-400℃/0.05-0.29 s−1,respectively. 展开更多
关键词 Al-Zn-Mg-Cu alloy tensile flow behavior microstructure constitutive modelling processing map
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Thermal decomposition of bastnaesite in an inert atmosphere and influence on flotation behavior 认领 引用
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作者 Qiang Zhang Yongsheng Sun +2 位作者 Peng Gao Zhao Cao Yuexin Han 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第6期1823-1837,共15页
This study aimed to elucidate the influence of thermal decomposition under an inert atmosphere on the phase composition,microstructure,and flotation performance of bastnaesite.Experiments showed that decomposition was... This study aimed to elucidate the influence of thermal decomposition under an inert atmosphere on the phase composition,microstructure,and flotation performance of bastnaesite.Experiments showed that decomposition was strongly temperature-dependent.After complete decomposition,the release of CO2 increased the rare earth oxide grade from 72.90wt%to 86.83wt%,accompanied by an increase in the Ce oxidation degree.Major decomposition products included rare earth oxyfluoride(REOF),rare earth trifluoride(REF3),and Ce7O12,with some products showing low crystallinity.The decomposition damaged the particle structure,resulting in the extensive lamellar cracking,a significant increase in specific surface area,and partial fragmentation of the particles.Flotation tests revealed that optimum recovery was achieved at pH 8.00–9.00.However,thermal decomposition increased the initial pulp pH to almost 11.00,making pH adjustment difficult.Salicylhydroxamic acid(SHA)was adsorbed on the surfaces by both physical and chemical interactions,with chemical adsorption being significantly enhanced after decomposition.During flotation,SHA was distributed not only on particle surfaces but also in internal pores after decomposition.Due to the phase and microstructural changes,the required dosage of SHA increased from 20 mg·L−1 for the raw ore to 250 mg·L−1.These results provide insights into the development of reagents suitable for the flotation of bastnaesite roasting products. 展开更多
关键词 bastnaesite thermal decomposition phase transformation flotation behavior adsorption mechanism
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New insight on phase transformation behavior of sub-rapid solidified 18Ni–Mo–Co maraging steel produced by strip casting 认领 引用
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作者 Hui Xu Wan-Lin Wang +3 位作者 Song Mao Pei-Sheng Lyu Kun Dou Ewan Lordan 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第2期258-274,共17页
The sub-rapid solidification(SRS)process associated with twin-roll strip casting(TRSC)is characterized by weakened elemental segregation and selective crystal growth,offering significant advantages compared with conve... The sub-rapid solidification(SRS)process associated with twin-roll strip casting(TRSC)is characterized by weakened elemental segregation and selective crystal growth,offering significant advantages compared with conventional casting methods.The interrelationship of the cooling rate,microstructureexture evolution,and segregation behavior along the thickness direction of as-cast 18Ni–Mo–Co maraging steel strip produced by TRSC was investigated.The results revealed that the solidification microstructure of as-cast maraging steel strip exhibits the directional dendrite growth with preferred{001}texture under SRS condition.It was also found that the synchronous enrichment of Ni,Mo,and Ti elements appears in the as-cast strip to form microsegregation bands.The solidification path of the designed maraging steel strip involves the phase transformation from liquid→γ→α.Additionally,the presence of microsegregation bands of Ni and Mo allows a portion of the austenite(6–9 vol.%)to remain at room temperature after undergoing solid-state phase transformation.It could be observed that the microstructure of as-cast 18Ni–Mo–Co maraging steel strip consists of martensite and austenite,with the austenite distributed alternatively at the interdendritic positions.Ultimately,the interrelationship among solidification cooling rate,element segregation,and solidification microstructure evolution during the SRS process of 18Ni–Mo–Co maraging steel was clarified. 展开更多
关键词 Strip casting Sub-rapid solidification Maraging steel Microsegregation behavior Phase transformation
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Seismic behavior of pile group-supported bridges in liquefiable sloping ground covered with crusts:Insights from experimental observations 认领 引用
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作者 Kemin Jia Chengshun Xu +2 位作者 Junfeng Jia Chao Zhang Xiuli Du 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期1781-1793,共13页
Pile group-supported bridges in liquefied sloping ground with crust are prone to severe damage.However,there remains a limited comprehension of the intricate interactions among pile group,soil,and superstructures,as w... Pile group-supported bridges in liquefied sloping ground with crust are prone to severe damage.However,there remains a limited comprehension of the intricate interactions among pile group,soil,and superstructures,as well as the associated failure mechanisms.To address this issue,this paper presents large-scale shaking table tests conducted on pile group-supported bridges in sloping liquefiable ground with crust to uncover the intricate interaction mechanisms.Firstly,the dynamic characteristics and interaction of the pile-soil-superstructure system were explored.Then,the lateral displacement and acceleration of the superstructure and pile were presented.Next,the curvature and damage characteristics of the pile group-supported bridge were discussed.Finally,through cross-correlation analysis,the study revealed the inertia and kinematic effects,focusing on how the effects influenced the seismic demands.Results indicate that significant differences are observed in pile-soil interactions during strong seismic events depending on the depth and liquefaction stage.As earthquake intensity increases,peak displacement in the superstructure rises linearly while residual displacement grows exponentially.Moreover,the pile group effect becomes more pronounced,especially at the pile head,with the trailing piles showing greater curvature than the leading ones.Due to significant soil lateral spreading and the shadowing effect within the pile group,the leading piles experience prominent kinematic effects from the surface down to the intermediate layer of saturated sand compared to the trailing piles.These findings contribute valuable insights for improving the seismic design approach for bridges with pile groups in sloping liquefied soils. 展开更多
关键词 Liquefiable soil Sloping ground Pile group Pile-soil-structure interaction Seismic behavior
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Levels and Disparities of 24-hour Movement Behaviors of Chinese Children Aged 3-5 Years:A Nationally Representative Cross-sectional Study(2019-2021) 认领 引用
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作者 Yifan Duan Ji Zhang +7 位作者 Linxiao Guo Xuehong Pang Qian Zhang Yuying Wang Tao Xu Bowen Chen Zhenyu Yang Wenhua Zhao 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2026年第3期285-296,共12页
Objective This study aimed to describe 24-hour movement behaviors,including physical activity,sedentary behavior,and sleep period,among Chinese preschoolers using nationally representative data,and examine disparities... Objective This study aimed to describe 24-hour movement behaviors,including physical activity,sedentary behavior,and sleep period,among Chinese preschoolers using nationally representative data,and examine disparities by age,gender,and residence.Methods A cross-sectional analysis was conducted using data from the China National Nutrition and Health Systematic Survey for Children(2019–2021),including 10,935 children aged 3–5 years.Daily total time of physical activity(TPA),total time of sedentary behaviors(TSB),and total sleep period(TSP)was collected via validated structured questionnaires.Physical inactivity was defined as<180 minutes of TPA per day.Results Median TPA was 121.4(IQR:71.4−209.6)minutes/day,and TSB was 231.4(IQR:175.0−304.3)minutes/day,with 11.46±1.00 hours/day average TSP.Overall,68.8%were physically inactive,with higher prevalence in rural(73.3%)versus urban areas(64.8%,P<0.001).TPA and TSB increased with age,while TSP decreased(all P<0.001).No significant gender differences were observed.Conclusion Most Chinese preschoolers exhibit insufficient physical activity and excessive sedentary behaviors,with notable urban–rural disparities and an escalating trend of ageing.Continuous monitoring and targeted interventions,especially in rural areas,are urgently needed. 展开更多
关键词 Physical activity Sedentary behavior Sleep duration Preschool children Urban-rural disparity Physical inactivity
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