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Effects of multi-directional forging combined with hot rolling on microstructure and mechanical properties of 7050 aluminum alloy 认领 引用
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作者 Xiao-fen TAN Hao-wei HUANG +3 位作者 Ze-kun LIAO Wen-bin ZHANG Xiao-peng LIANG Hui-zhong LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第7期1988-2004,共17页
Multi-directional forging at 450°C combined with rolling at 300°C and 470°C was applied to a 7050 aluminum alloy prior to heat treatment.The effects of rolling temperature on the microstructure of the a... Multi-directional forging at 450°C combined with rolling at 300°C and 470°C was applied to a 7050 aluminum alloy prior to heat treatment.The effects of rolling temperature on the microstructure of the alloy were analyzed using optical microscopy,X-ray diffraction,scanning electron microscopy,electron backscatter diffraction and transmission electron microscopy.After solution treatment,the average grain size of the alloy measured from high-angle grain boundaries was approximately 20μm,compared to 100μm before forging.After artificial aging,the yield strength,ultimate tensile strength and elongation after fracture of the samples rolled at 300°C were(609.9±5.5)MPa,(662.4±1.7)MPa and(18.5±1.2)%,respectively.In the case where the alloy was rolled at 470°C,the corresponding values were(592.7±4.2)MPa,(641.0±3.9)MPa and(18.7±0.9)%,respectively. 展开更多
关键词 7050 aluminum alloy multi-directional forging rolling microstructure mechanical properties
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Designing Optimal Temperature for Multi-directional Forging Process:A Phase-Field Crystal Study 认领 引用
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作者 Song Zhuo Li Huanqing +3 位作者 Tian Xiaolin Kang Xiaolan Hou Hua Zhao Yuhong 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第5期1146-1156,共11页
Using multi-directional forging temperature as the independent variable and adopting the dual-mode phase field crystal model,the nucleation modes,reaction mechanisms,and interactions between grain boundaries and dislo... Using multi-directional forging temperature as the independent variable and adopting the dual-mode phase field crystal model,the nucleation modes,reaction mechanisms,and interactions between grain boundaries and dislocations at different temperatures were investigated.Results show that a mapping relationship between process parameters and grain refinement/coarsening is established,and the optimal processing temperature coefficient is 0.23.Compared with the cases with processing temperature coefficient of 0.19,0.20,0.21,0.25,and 0.27,the refinement effect increases by 256.0%,146.0%,113.0%,6.7%,and 52.4%,respectively.Excessively high temperatures lead to grain coarsening due to dislocation annihilation,and the application of strain can reduce the actual melting point of materials.Even if the processing temperature does not exceed the theoretical melting point,remelting and crystallization may still occur,resulting in an overburning phenomenon that reduces internal defects and increases overall grain size.This research is of great significance for the actual forging process design. 展开更多
关键词 phase-field crystal method multi-directional forging temperature grain refinement dislocation
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A nonlinear damping absorber for broadband and multi-directional vibration suppression 认领 引用
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作者 Haiting ZHENG Hu DING J.C.JI 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第6期1301-1322,共22页
Most existing vibration absorbers are limited by the need for precise tuning,and are difficult to suppress broadband vibration.A nonlinear damping absorber(NDA)is proposed in this paper to control the vibrations of st... Most existing vibration absorbers are limited by the need for precise tuning,and are difficult to suppress broadband vibration.A nonlinear damping absorber(NDA)is proposed in this paper to control the vibrations of structures in multiple modes,providing nonlinear damping in multiple directions and enabling broadband and multi-directional vibration suppression.A pipe is selected as the research object to analyze its dynamic behaviors and vibration suppression mechanisms.The vibration reduction performance of the NDA on the in-plane vibration and out-of-plane vibration of the pipe is studied through experimentation and theory.First,the configuration of the NDA is designed,and its mechanical model is established.An experimental platform is built for the parameter identification and multi-directional vibration reduction test of the absorber.Second,based on the generalized Hamilton's principle,the mechanical model describing the in-plane vibration and out-of-plane vibration of the pipe with the NDAs is derived.The approximate solution of the nonlinear response is derived and numerically validated.The multi-directional and multi-modal vibration reduction efficiency of the NDAs for the structures is analyzed.The research results show that the proposed absorber can significantly control the multi-directional vibration.Nonlinear damping effectively broadens the vibration reduction bandwidth,and improves the damping efficiency,with the cubic term playing the dominant role.Finally,a concept of multi-modal weighted optimization is proposed.The absorber parameters are optimized through the particle swarm optimization(PSO)algorithm.This paper provides a new type of absorbers for the vibration control of multiple directions in broadband. 展开更多
关键词 absorber nonlinear damping multi-directional vibration vibration control
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Research on the stress corrosion cracking behavior of ZK60 magnesium alloy enhanced by multi-directional compression process 认领 引用
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作者 Xinyue Liang Jiaqi Hu Hong Gao 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期368-386,共19页
The poor corrosion resistance and high susceptibility to stress corrosion cracking(SCC)of magnesium alloys limit their potential in biodegradable implant applications.This study systematically investigates the corrosi... The poor corrosion resistance and high susceptibility to stress corrosion cracking(SCC)of magnesium alloys limit their potential in biodegradable implant applications.This study systematically investigates the corrosion behavior and SCC resistance of ZK60 magnesium alloy processed by multi-directional compression(MDC).A combination of electrochemical measurements,slow strain rate tensile(SSRT)testing,and advanced microstructural characterization was employed to evaluate the material’s performance in phosphate buffer solution(PBS).The results demonstrate that MDC processing significantly refines the grain structure from 19.69μm(T4)to 7.89μm(12MDC),simultaneously increasing dislocation density and fragmenting second-phase particles.These microstructural modifications shift the corrosion mechanism from localized pitting to uniform corrosion,reducing the electrochemical corrosion rate by 42.8%and the hydrogen evolution corrosion rate by 88.6%in the 12MDC sample.Furthermore,theε-and UTS-related SCC susceptibility indices are reduced by 14.7%(12MDC)and 17.5%(6MDC),respectively,compared with the T4 sample,which is attributed to the dense twin/grain boundary networks that deflect cracks and dissipate fracture energy.The synergistic effects of grain refinement,dislocation strengthening,and Orowan mechanism collectively enhance both mechanical properties and corrosion resistance.This work confirms that MDC processing effectively improves the functional reliability of ZK60 alloy for biomedical applications through microstructural optimization. 展开更多
关键词 Stress corrosion cracking Multi-directional compression Strengthening mechanism Magnesium alloy
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Coarse grain non-uniform refinement simulation in multi-directional forging of titanium alloys based on macro-deformation and crystal plasticity modelling 认领 引用
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作者 Shiqi Guo Liang Huang +1 位作者 Kezhuo Liu Changmin Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第34期128-144,共17页
The complex grain fragmentation mechanisms of coarse grains in titanium alloys under multi-directional forging(MDF)directly influence the optimization and control of primary hot working processes.This study conducted ... The complex grain fragmentation mechanisms of coarse grains in titanium alloys under multi-directional forging(MDF)directly influence the optimization and control of primary hot working processes.This study conducted MDF experiments onβ-phase as-cast Ti-6554 alloy and simulated non-uniform deformation during cyclic multi-directional compression through macro-and micro-deformation modeling.The results revealed that friction and surface cooling caused low strain and tensile stress concentration at billet edges,leading to mixed grain structures.In contrast,high strain and triaxial compressive stress at billet centers facilitated uniform grain refinement.After 14 compressions and 4 intermediate reheating processes,coarse grains of the billet were refined from 2-5 mm to 0.25-0.50 mm,achieving uniform grain sizes across different regions.For the first time,the orientation evolution of grains with different morphologies during multi-directional compressions was visualized microscopically.Columnar grains were found to be more easily subdivided than equiaxed grains due to local strain accumulation.Under cumulative compressions,grain orientations gradually rotated from uniform to random,driving continuous dynamic recrystallization(CDRX).Slip system interactions and concentrated misorientation led to the formation and extension of transition and shear bands,inducing grain fragmentation dominated by transgranular subdivided CDRX.Smooth grain boundaries transformed into serrated ones after multiple passes,providing additional nucleation sites for discontinuous dynamic recrystallization(DDRX)and facilitating boundary expand CDRX.The interaction of diverse DRX mechanisms was the fundamental cause of grain refinement.This study clarified the principles of refining and homogenizing millimeter-grade coarse grains under increasing forging strain,offering valuable insights for the development of primary hot processing techniques for as-castβtitanium alloys. 展开更多
关键词 Titanium alloy Multi-directional forging Coarse grain refinement Crystal plasticity modeling Grain orientation evolution
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Superplasticity of fine-grained Mg−Gd−Y−Zn−Zr alloy prepared via multi-directional forging 认领 引用
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作者 Jing-qi ZHAO Ze-zheng WANG +3 位作者 Chun KE Qiang MENG Chun-xiang ZHANG Jun-ting LUO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第8期2553-2571,共19页
The superplasticity of the Mg−8.59Gd−3.85Y−1.14Zn−0.49Zr alloy was investigated before and after multi-directional forging(MDF)and the mechanisms affecting superplastic deformation were analyzed.The results indicate t... The superplasticity of the Mg−8.59Gd−3.85Y−1.14Zn−0.49Zr alloy was investigated before and after multi-directional forging(MDF)and the mechanisms affecting superplastic deformation were analyzed.The results indicate that after MDF at a temperature of 350℃and strain rates of 0.1 and 0.01 s−1(1-MDFed and 2-MDFed),the superplasticity of the alloy can be significantly improved.The elongations of the MDFed alloys exceed 400%under the strain rate of 6.06×10−4s−1and temperatures of 350,375,and 400℃,and reach the maximum values of 766%(1-MDFed)and 693%(2-MDFed)at 375℃.The grain boundary sliding of the MDFed alloy is sufficient,and the energy barrier of deformation decreases.Theβphase limits the grain growth and promotes dynamic recrystallization,maintaining the stability of the fine-grained structure during superplastic deformation.Several Y-rich phases nucleate in the high-strain region(i.e.,the final fracture region)at high temperatures,accelerating the fracture of the specimen. 展开更多
关键词 Mg−Gd−Y−Zn−Zr superplasticity multi-directional forging fracture morphology Y-rich phase
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Substantia nigra related gene polymorphisms associated with antipsychotic-induced acute movement disorders:a genome-wide association study and multi-ancestry validation in schizophrenia 认领 引用 被引量：1
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作者 Zhe Lu Yao-Yao Sun +5 位作者 Zhe-Wei Kang Guo-Rui Zhao Yu-Yanan Zhang Jun-Yuan Sun Rui Yuan Wei-Hua Yue 《Military Medical Research》 SCIE CAS CSCD 2026年第2期185-197,共13页
Background:Antipsychotic-induced movement disorders(AIMDs)are prevalent side effects of antipsychotics,particularly during the acute phase of treatment.This study aimed to elucidate the genetic mechanisms underlying A... Background:Antipsychotic-induced movement disorders(AIMDs)are prevalent side effects of antipsychotics,particularly during the acute phase of treatment.This study aimed to elucidate the genetic mechanisms underlying AIMDs using a genome-wide association study(GWAS).Methods:GWASs on AIMDs were conducted in three independent cohorts:a discovery cohort of 3067 patients(2016 subjects were reserved after quality control),a validation cohort of 277 patients,and a multi-ancestry validation cohort of 766 patients.Subsequent post-GWAS analyses included gene-based analyses,transcriptome-wide association studies(TWASs),and polygenic risk score(PRS)profiling.Results:Our study identified two loci located in RAB44 gene(rs116249243,P=5.98×10-9;rs117097482,P=1.17×10-8)associated with extrapyramidal symptoms(EPSs),1 locus(rs6826172,P=5.56×10-9)related to akathisia,and 76 loci linked to involuntary movements(11 genes were mapped).Risk loci located in CNTNAP2,LUZP2,TMEM167A,and RAB44 genes were successfully replicated in the validation cohort,whereas the locus located in RAB44 was also replicated in the multi-ancestry cohort.Gene-based analyses indicated that XRCC4 and PAIP2B reached significance at the genome-wide level in involuntary movements.Tissue expression analysis revealed that involuntary movement-related genes are predominantly expressed in the substantia nigra.Additionally,the TWAS suggested a causal relationship between XRCC4 and involuntary movement.The PRSs derived from the discovery cohort significantly predicted AIMDs in the validation cohort,with area under the receiver operating characteristic curve(AUC)values from 0.60 to 0.80.Conclusions:Our findings highlight the role of substantia nigra related gene polymorphisms in AIMDs.This study provides novel insights into the pathogenesis of AIMDs and supports the potential for personalized treatment approaches for schizophrenia. 展开更多
关键词 Antipsychotic Movement disorders Genome-wide association study(GWAS) Substantia nigra Multiancestry validation
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Adherence to the 24-Hour Movement Guidelines is related to a lower risk of all-cause mortality:A prospective cohort study of 14,288 participants from the SUN Project 认领 引用
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作者 JoséFrancisco López-Gil Mark S.Tremblay +4 位作者 Maira Bes-Rastrollo Laura Moreno-Galarraga Stefanos N.Kales MiguelÁngel Martínez-González Alejandro Fernandez-Montero 《Journal of Sport and Health Science》 SCIE CAS CSCD 2026年第3期74-83,共10页
Purpose:The purpose of this study was to examine the associations between adherence to the 24-Hour Movement Guidelines and all-cause and cause-specific mortality in a large Spanish prospective cohort.Methods:We analyz... Purpose:The purpose of this study was to examine the associations between adherence to the 24-Hour Movement Guidelines and all-cause and cause-specific mortality in a large Spanish prospective cohort.Methods:We analyzed data from 14,288 participants of the Seguimiento Universidad de Navarra(SUN)Project,followed for a mean of 12.8 years(mean baseline age=38.3 years;60.1%women).Data were collected at baseline and through biennial follow-up questionnaires(up to 10 waves,depending on year of entry).The participants self-reported 24-h movement behaviors at baseline and were categorized based on the number of guidelines met(0-3).Behaviors were assessed at baseline only;changes in adherence during follow-up were not accounted for.Cox proportional hazards models were used to estimate hazard ratios(HRs)for all-cause and cause-specific mortality,adjusting for sociodemographic,lifestyle,and clinical covariates.Results:Meeting a greater number of 24-Hour Movement Guidelines at baseline was associated with a progressively lower risk of all-cause mortality.Compared with those meeting none,the multivariable-adjusted HRs were 0.52(95%confidence interval(95%CI):0.33-0.82)for meeting 1 guideline,0.47(95%CI:0.30-0.73)for meeting 2 guidelines,and 0.44(95%CI:0.28-0.71)for meeting all 3 guidelines.Only adherence to the physical activity guidelines was independently associated with a significantly lower mortality risk(HR=0.70;95%CI:0.55-0.89).A reduced risk was also observed for cancer and other-cause mortality among those meeting 2 or more guidelines.Conclusion:Adherence to the 24-Hour Movement Guidelines at baseline,particularly physical activity,was associated with a lower risk of mortality.Promoting an integrated approach to movement behaviors may be an effective strategy for improving population health and longevity. 展开更多
关键词 Physical activity Sedentary behavior Sleep duration Lifestyle Movement behaviors
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Decoding Hand Gestures Under Arm Movements Based on Electromyography and Acceleration Signals 认领 引用
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作者 Xiaoru Niu Dingguo Zhang +5 位作者 Chenxi Qu Lei Ren Zhihui Qian Jianan Wu Kunyang Wang Luquan Ren 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第2期880-897,共18页
Gesture classification based on surface electromyography(sEMG)have been extensively investigated towards the control of smart prosthetic hands.However,most studies did not consider the effects of arm position and move... Gesture classification based on surface electromyography(sEMG)have been extensively investigated towards the control of smart prosthetic hands.However,most studies did not consider the effects of arm position and movements that frequently occur in daily activities.This study aims to address the gesture classification challenge under arm movements.We collected sEMG and acceleration(ACC)data from fourteen participants,including two individuals with radial artery amputations,while performing gestures in both static and dynamic arm states.Using the collected data,the performance of three machine learning methods was evaluated for gesture classification under both arm movements and static arm conditions.The results revealed a 17.48%decrease in average classification accuracy in the dynamic state compared to the static state when using sEMG signals.Subsequently,the improvement in classification accuracy under arm movements was validated using both sEMG and ACC,with deep learning achieving the highest average accuracy of 84.35%across healthy subjects.Additionally,the study assessed the impact of gesture similarity on classification performance and evaluated the practical efficacy of classifiers for amputees.To further enhance gesture classification accuracy under arm movements,a two-stage gesture classification model training method based on ResNet18 was proposed.This method first learns a generalized motion prototype from population data and then adapts it to individual subjects via fine-tuning,resulting in a 2.49%improvement in average recognition accuracy across all 14 subjects. 展开更多
关键词 Gesture classification SEMG ACC Arm movement Amputee Two-stage learning
Microstructure evolution and mechanical properties of Mg−Gd−Zn alloy with and without LPSO phase processed by multi-directional forging 认领 引用 被引量：4
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作者 Jing-yi HUANG Yao-ling LIU +3 位作者 Yu-xiang HAN Ying-chun WAN Chu-ming LIU Zhi-yong CHEN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2025年第4期1075-1091,共17页
The homogenized Mg−5.6Gd−0.8Zn(wt.%)alloys were treated with water cooling and furnace cooling to obtain specimens without and with the 14H long-period stacking ordered(LPSO)phase.Subsequently,multi-directional forgin... The homogenized Mg−5.6Gd−0.8Zn(wt.%)alloys were treated with water cooling and furnace cooling to obtain specimens without and with the 14H long-period stacking ordered(LPSO)phase.Subsequently,multi-directional forging(MDF)experiments were carried out.The microstructure and mechanical properties of different regions(the center,middle and edge regions)in the MDFed alloys were systematically investigated,and the effect of LPSO phase on them was discussed.The results show that the alloys in different regions undergo significant grain refinement during the MDF process.Inhomogeneous microstructures with different degrees of dynamic recrystallization(DRX)are formed,resulting in microhardness heterogeneity.The alloy with the LPSO phase has higher microstructure homogeneity,a higher degree of recrystallization,and better comprehensive mechanical properties than the alloy without the LPSO phase.The furnace-cooled alloy after 18 passes of MDF has the best comprehensive mechanical properties,with an ultimate compressive strength of 488 MPa,yield strength of 258 MPa,and fracture strain of 21.2%.DRX behavior is closely related to the LPSO phase and deformation temperature.The kinked LPSO phase can act as a potential nucleation site for DRX grains,while the fragmented LPSO phase promotes DRX nucleation through the particle-stimulated nucleation mechanism. 展开更多
关键词 Mg−Gd−Zn alloy multi-directional forging LPSO phase twinning kink dynamic recrystallization
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Overlying strata movement and surface deformation through roof cutting and pressure relief:Geomechanics model and field tests 认领 引用
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作者 Jiong Wang Peng Liu +4 位作者 Jian Jiang Lei Ma Zhen Yang Zimin Ma Manchao He 《International Journal of Coal Science & Technology》 SCIE EI CAS CSCD 2026年第2期257-280,共24页
The Self-formed roadways by roof cutting and pressure relief(SF-RCPR)represents a novel approach that eliminates the need for coal pillars by naturally creating roadways through Roof Cutting Pressure Relief(RCPR)techn... The Self-formed roadways by roof cutting and pressure relief(SF-RCPR)represents a novel approach that eliminates the need for coal pillars by naturally creating roadways through Roof Cutting Pressure Relief(RCPR)technology.This study investigates overlying strata movement and surface deformation in the 5-200 working face of the Dianping Coal Mine,using geomechanics model tests.Key monitoring techniques include infrared thermal imaging,digital image correlation(DIC),static strain gauges,and sketches.The findings reveal that overlying strata movement during mining can be categorized into distinct stages:finite deformation,immediate roof collapse,main roof breaks and rotates,and overlying strata stabilization.The strata form a complete caving zone,fractured zone,and slow subsidence zone,effectively eliminating the bending subsidence zone.Rock strata subsidence curves exhibit“S-type”,“exponential”,and“similar S-type”patterns.Infrared thermal images reveal varying temperature zones corresponding to overburden movement“three zones”,with notable differences between the roof cutting and non-roof cutting sides.During the immediate roof collapse,the temperature dropped by 1.8℃,then rose by 0.6℃ as the main roof collapsed.Field measurements of surface cracks under the SF-RCPR were compared to those under the traditional longwall mining method(TLMM).Even after three mining disturbances,crack widths under SF-RCPR remained mostly between 0.01 and 0.2 m,with depths primarily ranging from 0.1 to 0.2 m,resulting in minimal ground damage.These findings deepen the understanding of overburden movement under SF-RCPR and demonstrate its effectiveness in minimizing surface damage. 展开更多
关键词 Geomechanics model test Roof cutting and pressure relief Overlying strata movement Surface deformation Field test
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UGEA-LMD: A Continuous-Time Dynamic Graph Representation Enhancement Framework for Lateral Movement Detection 认领 引用
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作者 Jizhao Liu Yuanyuan Shao +2 位作者 Shuqin Zhang Fangfang Shan Jun Li 《Computers, Materials & Continua》 SCIE EI 2026年第1期1924-1943,共20页
Lateral movement represents the most covert and critical phase of Advanced Persistent Threats(APTs),and its detection still faces two primary challenges:sample scarcity and“cold start”of new entities.To address thes... Lateral movement represents the most covert and critical phase of Advanced Persistent Threats(APTs),and its detection still faces two primary challenges:sample scarcity and“cold start”of new entities.To address these challenges,we propose an Uncertainty-Driven Graph Embedding-Enhanced Lateral Movement Detection framework(UGEA-LMD).First,the framework employs event-level incremental encoding on a continuous-time graph to capture fine-grained behavioral evolution,enabling newly appearing nodes to retain temporal contextual awareness even in the absence of historical interactions and thereby fundamentally mitigating the cold-start problem.Second,in the embedding space,we model the dependency structure among feature dimensions using a Gaussian copula to quantify the uncertainty distribution,and generate augmented samples with consistent structural and semantic properties through adaptive sampling,thus expanding the representation space of sparse samples and enhancing the model’s generalization under sparse sample conditions.Unlike static graph methods that cannot model temporal dependencies or data augmentation techniques that depend on predefined structures,UGEA-LMD offers both superior temporaldynamic modeling and structural generalization.Experimental results on the large-scale LANL log dataset demonstrate that,under the transductive setting,UGEA-LMD achieves an AUC of 0.9254;even when 10%of nodes or edges are withheld during training,UGEA-LMD significantly outperforms baseline methods on metrics such as recall and AUC,confirming its robustness and generalization capability in sparse-sample and cold-start scenarios. 展开更多
关键词 Advanced persistent threat(APTs) lateral movement detection continuous-time dynamic graph data enhancement
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Substantia nigra-related gene polymorphisms associated with acute antipsychotic-induced movement disorders 认领 引用
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作者 Kenji Hashimoto 《Military Medical Research》 SCIE CAS CSCD 2026年第2期338-339,共2页
Antipsychotics,especially many second-generation antipsychotics(SGAs),remain central to schizophrenia treatment,are indispensable in acute mania and for bipolar maintenance(with selected roles in bipolar depression),a... Antipsychotics,especially many second-generation antipsychotics(SGAs),remain central to schizophrenia treatment,are indispensable in acute mania and for bipolar maintenance(with selected roles in bipolar depression),and serve as evidence-based augmenters in treatment-resistant depression.Nonetheless,acute antipsychotic-induced movement disorders(AIMDs)[extrapyramidal symptoms(EPS)]are common and clinically costly,impairing quality of life,adherence,and outcomes.The acute spectrum is dominated by dystonia(sustained,often painful contractions). 展开更多
关键词 Antipsychotic Movement disorder Polymorphism Substantia nigra
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Reducing Depression and Anxiety in Children and Adolescents Facing Food Insecurity:The Joint and Independent Contributions of Movement Behaviors 认领 引用
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作者 Wenjiao Li Shiliang Chen +1 位作者 Xinxing Li Yanjie Zhang 《International Journal of Mental Health Promotion》 2026年第7期108-120,共13页
Backgrounds:Youth living in food-insecure households show greater vulnerability to psychiatric symptoms,including anxiety and depression.Although physical activity and sedentary behavior are established correlates of ... Backgrounds:Youth living in food-insecure households show greater vulnerability to psychiatric symptoms,including anxiety and depression.Although physical activity and sedentary behavior are established correlates of youth mental health,their associations within the context of food insecurity households remain understudied.This study examines how physical activity and sedentary behavior relate to depression and anxiety risk among children residing in food-insecure households.Methods:We analyzed data from the 2021–2022 National Survey of Children’s Health(NSCH),focusing on youth aged 6–17 years(n=2118)living in food insecurity households.Multivariate logistic regression models adjusted for age,sex,race,parental education,family income,and overweight status were used to estimate odds ratios(ORs)and 95%confidence intervals(CIs)for the link between physical activity and sedentary time and the risks of depression and anxiety.Results:Meeting physical activity guideline(≥60 min MVPA/day)was significantly associated with lower odds of both depression(OR=0.63,95%CI:0.44–0.89,p=0.009)and anxiety(OR=0.60,95%CI:0.45–0.78,p<0.001).Meeting sedentary behavior guideline showed a significant association with reduced odds of depression(OR=0.56,95%CI:0.43–0.74,p<0.001)and anxiety(OR=0.78,95%CI:0.64–0.97,p=0.025).Most notably,children who met both physical activity and sedentary behavior guidelines exhibited a significant reduction in depression(OR=0.56,95%CI:0.33–0.94,p=0.027)and anxiety(OR=0.61,95%CI:0.43–0.87,p=0.009)risk.Conclusions:The findings of this study reveal associations between meeting physical activity and sedentary behavior guidelines independently and jointly reduced risks of depression and anxiety,respectively.Future longitudinal cohort study should examine the prospective association of physical activity,sedentary behavior,and mental health among youth living in food-insecure households. 展开更多
关键词 Movement behaviors mental disorders food insecurity National Survey of Children’s Health(NSCH)
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Advanced Computational Modeling and Mechanical Behavior Analysis of Multi-Directional Functionally Graded Nanostructures:A Comprehensive Review 认领 引用
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作者 Akash Kumar Gartia S.Chakraverty 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第3期2405-2455,共51页
This review explores multi-directional functionally graded(MDFG)nanostructures,focusing on their material characteristics,modeling approaches,and mechanical behavior.It starts by classifying different types of functio... This review explores multi-directional functionally graded(MDFG)nanostructures,focusing on their material characteristics,modeling approaches,and mechanical behavior.It starts by classifying different types of functionally graded(FG)materials such as conventional,axial,bi-directional,and tri-directional,and the material distribution models like power-law,exponential,trigonometric,polynomial functions,etc.It also discusses the application of advanced size-dependent theories like Eringen’s nonlocal elasticity,nonlocal strain gradient,modified couple stress,and consistent couple stress theories,which are essential to predict the behavior of structures at small scales.The review covers the mechanical analysis of MDFG nanostructures in nanobeams,nanopipes,nanoplates,and nanoshells and their dynamic and static responses under different loading conditions.The effect of multi-directional material gradation on stiffness,stability and vibration is discussed.Moreover,the review highlights the need for more advanced analytical,semi-analytical,and numerical methods to solve the complex vibration problems ofMDFG nanostructures.It is evident that the continued development of these methods is crucial for the design,optimization,and real-world application of MDFG nanostructures in advanced engineering fields like aerospace,biomedicine,and microanoelectromechanical systems(MEMS/NEMS).This study is a reference for researchers and engineers working in the domain of MDFG nanostructures. 展开更多
关键词 Functionally graded multi-directional nano size-dependent vibration
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Effects of physical activity interventions on fundamental movement skills and cognitive function in early childhood:A systematic review and network meta-analysis 认领 引用
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作者 Shan Jiang Nan Zeng +4 位作者 Johan Y.Y.Ng Kar Hau Chong Taoran Zeng Suzannie K.Y.Leung Amy S.Ha 《Journal of Sport and Health Science》 SCIE CAS CSCD 2026年第3期37-50,共14页
Background:Health benefits have been reported for many physical activity(PA)interventions for improving fundamental movement skills(FMS)and cognitive function(CF),but the most effective type of PA interventions for em... Background:Health benefits have been reported for many physical activity(PA)interventions for improving fundamental movement skills(FMS)and cognitive function(CF),but the most effective type of PA interventions for emhancing FMS and CF in early childhood remain unknown.Thus,the study aimed to determine the effects of PA interventions in enhancing FMS and CF among young children and to establish the optimal types of PA interventions.Methods:Six electronic databases(PubMed,OVID,SPORTDiscus,Scopus,Web of Science,and Cochrane)were searched for studies from inception to March 17,2024.Randomized controlled trials(RCTs)were included in this study if they reported outcomes related to FMS,CF,or both associated with PA interventions.Effect sizes were calculated and performed as Hedges'g.The hierarchy of competing interventions was established using the surface under the cumulative ranking curve(SUCRA).Risk of bias was independently assessed using the Cochrane Riskof-Bias 2.Results:This analysis included 38 studies with 5237 young children,with sample sizes ranging from 32 to 897 participants.The types of PA interventions analyzed included active play/free play/unstructured PA(AP),general structured PA(GSPA),FMS-targeted PA programs(FMSprograms),cognitively-engaging PA programs(CPA),multilevel PA interventions(MPA),and exergaming.PA interventions had a large,pooled effect size for total FMS(g=0.96;95%CI:0.45-1.46;p<0.01;I2=94%).For CF,a small-to-moderate pooled effect size was found(g=0.39;95%CI:0.18-0.60;p<0.01;I2=88%).PA interventions longer than 3 months showed fewer benefits for FMS(p<0.01).The network meta-analysis showed that FMS-programs(standardized mean difference((SMD)=1.55,95%CI:0.98-2.11,SUCRA=98.3%)and GSPA(SMD=0.94,95%CI:0.05-1.85,SUCRA=69.8%)significantly improved total FMS compared to AP.For locomotor skills(LMS),exergaming ranked highest(SUCRA=79.3%),followed by FMS-programs(75.9%)and GSPA(61.6%).However,despite its top ranking,exergaming's effect estimate was not statistically significant(SMD=1.38,95%CI:-0.08 to 2.85).For object control skills(OCS),exergaming again ranked highest(SUCRA=91.9%)and showed the largest significant effect(SMD=2.38,95%CI:0.96-3.80),followed by FMS-programs(SUCRA=78.5%)and GSPA(SUCRA=53.7%).FMS-programs,GSPA,MPA,and UC also significantly improved OCS compared to AP.While no significant differences were observed across PA interventions for most CF domains,exergaming had a significant positive effect on working memory(SMD=1.41,95%CI:0.07-2.75).The certainty of evidence varied from low to moderate.Conclusion:These findings emphasize the importance of PA interventions in improving FMS and CF in early childhood.FMS-programs and GSPA appear to be the most effective approaches for enhancing total FMS,while exergaming showed the highest ranking for LMS and OCS,with a significant impact on OCS but uncertainty in LMS improvements.Additionally,exergaming had a positive effect on working memory,suggesting its potential cognitive benefits. 展开更多
关键词 Physical activity Fundamental movement skills Cognitive function Early childhood
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Modified constraint-induced movement therapy for lower extremity intervention on patients with stroke:A Scoping Review 认领 引用
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作者 Liping Zhou Huaide Chu +3 位作者 Manting Cao Nur Arzuar Abdul Rahim Hazwani Ahmad Yusof Ying Hou 《Sports Medicine and Health Science》 CAS CSCD 2026年第3期291-301,共11页
Background:Stroke is the main cause of long-term disability,burdening people and healthcare systems.In stroke patients,modified Constraint-Induced Movement Therapy(mCIMT)may improve lower extremity function.Protocol v... Background:Stroke is the main cause of long-term disability,burdening people and healthcare systems.In stroke patients,modified Constraint-Induced Movement Therapy(mCIMT)may improve lower extremity function.Protocol variability complicates efficacy evaluation.Objectives:For stroke patients'lower extremity rehabilitation,examine mCIMT safety and effectiveness and identify important protocol components for motor recovery augmentation.Methods:An extensive PubMed,Web of Science,Scopus,and PEDro search found clinical studies on mCIMT for lower extremity mobility impairments in adult stroke patients published between January 1,2000,and November 30,2023.Constraints,doses,transfer packages,and outcome measures analyzed heterogeneity and study classifications appraised quality.Results:36 trials with 931 stroke victims were examined.Heterogeneity prevented clear results on the best mCIMT methods.Studies show that mCIMT improves motor function,functional mobility,balance,lower limb strength,weight-bearing,and walking ability with minor side effects.Physical restraint devices may be unsafe and painful.For safety,behavioral limitations are advised.Instead of training length,task repetitions are a better indication of training intensity and can decrease training time.Transfer packages help transfer training gains to daily activities and preserve long-term effects,as shown by better real-world walking habits and functional mobility during follow-up.Conclusions:mCIMT is safe and effective for stroke lower extremity rehabilitation.Behavioral limitations,a specified dose of task repetitions,and patient-specific transfer packages are recommended for mCIMT.Standardizing methods and finding appropriate component combinations to overcome heterogeneity and improve clinical applicability and patient outcomes require further study. 展开更多
关键词 Stroke Modified constraint-induced movement therapy Lower extremity Motor dysfunction
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Compliance with Three Movement Behaviors and Psychological Health among Adults with Diabetes 认领 引用
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作者 Wenjiao Li Shiliang Chen +2 位作者 Shihui Chen Xinxing Li Yanjie Zhang 《International Journal of Mental Health Promotion》 2026年第2期68-82,共15页
Objectives:24-h movement behaviors(24-HMB),encompassing physical activity,sedentary behavior,and sleep duration,are increasingly regarded as interrelated and important factors for mental health.However,evidence on the... Objectives:24-h movement behaviors(24-HMB),encompassing physical activity,sedentary behavior,and sleep duration,are increasingly regarded as interrelated and important factors for mental health.However,evidence on the comprehensive association of these behaviors with mental health in adults with diabetes in developing countries remains scarce.This study examined the association between 24-HMB guidelines and psychological health among adults with diabetes in developing countries.Methods:Data were retrieved from the World Health Organization’s study on Global Aging and Adult Health Survey dataset.Adults(N=1905)diagnosed with diabetes from five low-and middle-income countries were included.The exposure of interest was adherence to 24-HMB guidelines,depression,cognition,and quality of life(QoL).Multiple logistic and multiple linear regression analyses were used to examine the association between meeting 24-HMB guidelines and depression,cognition,and QoL,respectively.Results:This cross-sectional study revealed that 28.61%complied with all three 24-HMB guidelines.Diabetic patients who met more numbers of 24-HMB guidelines had lower depression risk(OR=0.74,95%CI:0.61 to 0.91,p=0.004),greater cognition(β=0.42,95%CI:0.25 to 0.60,p<0.001),and QoL(β=1.30,95%CI:1.04 to 1.55,p<0.001)with the non-compliant population.For specific combinations,meeting all three guidelines were significantly associated with lower odds of depression,improved cognitive function,and enhanced QoL(all p<0.001).Conclusion:These findings support that meeting 24-HMB guidelines in a single or combined movement behaviors was significantly related to reduced risk of depression,enhanced cognitive function,and improved QoL among individuals with diabetes. 展开更多
关键词 Movement behaviors diabetes mellitus mental health quality of life sleep
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Advantages of combined limb movement and proprioception training in stroke patients with hemiplegia 认领 引用
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作者 LU Mingming 《外文科技期刊数据库（文摘版）医药卫生》 2026年第3期095-099,共5页
Objective To investigate the clinical value of combined limb functional exercise and proprioception therapy in patients with hemiplegia following stroke, and to analyze its specific effects on limb function recovery a... Objective To investigate the clinical value of combined limb functional exercise and proprioception therapy in patients with hemiplegia following stroke, and to analyze its specific effects on limb function recovery and daily living abilities. Methods A total of 160 stroke-induced hemiplegic patients admitted to our hospital from January to December 2024 were enrolled and randomly assigned to either a combined therapy group or a conventional rehabilitation group (n=80 each). The conventional rehabilitation group received standard stroke rehabilitation interventions, while the combined therapy group received additional limb functional exercise and proprioception therapy alongside conventional rehabilitation. Differences in limb function scores, daily living ability scores, and incidence of complications were compared between the two groups before and after intervention. Results Prior to intervention, there were no significant differences in limb function scores (72.45 ± 7.62) or daily living ability scores (70.38 ± 6.82) between the two groups (P> 0.05). After intervention, the combined therapy group showed significantly higher scores than the conventional rehabilitation group (58.82±7.15 for limb function and 56.72 ± 6.45 for daily living ability), with a significantly lower overall complication rate (5.00% vs. 26.25%) in the combined therapy group. These differences were statistically significant. Conclusion Combined limb functional exercise and proprioception therapy effectively promotes limb function recovery, enhances daily living abilities, and reduces the risk of complications in stroke-induced hemiplegia patients, demonstrating clinical applicability for widespread adoption. 展开更多
关键词 Limb functional movement Proprioception Combined therapy Stroke Hemiplegia Limb function
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Structure uniformity and limits of grain refinement of high purity aluminum during multi-directional forging process at room temperature 认领 引用 被引量：16
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作者 朱庆丰 李磊 +3 位作者 班春燕 赵志浩 左玉波 崔建忠 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第5期1301-1306,共6页
The effect of forging passes on the refinement of high purity aluminum during multi-forging was investigated. The attention was focused on the structure uniformity due to deformation uniformity and the grain refinemen... The effect of forging passes on the refinement of high purity aluminum during multi-forging was investigated. The attention was focused on the structure uniformity due to deformation uniformity and the grain refinement limitation with very high strains. The results show that the fine grain zone in the center of sample expands gradually with the increase of forging passes. When the forging passes reach 6, an X-shape fine grain zone is initially formed. With a further increase of the passes, this X-shape zone tends to spread the whole sample. Limitation in the structural refinement is observed with increasing strains during multi-forging process at the room temperature. The grains size in the center is refined to a certain size （110 μm as forging passes reach 12, and there is no further grain refinement in the center with increasing the forging passes to 24. However, the size of the coarse grains near the surface is continuously decreased with increasing the forging passes to 24. 展开更多
关键词 multi-directional forging high purity aluminum structure uniformity grain refinement
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