Actuator faults can be critical in turbofan engines as they can lead to stall,surge,loss of thrust and failure of speed control.Thus,fault diagnosis of gas turbine actuators has attracted considerable attention,from b...Actuator faults can be critical in turbofan engines as they can lead to stall,surge,loss of thrust and failure of speed control.Thus,fault diagnosis of gas turbine actuators has attracted considerable attention,from both academia and industry.However,the extensive literature that exists on this topic does not address identifying the severity of actuator faults and focuses mainly on actuator fault detection and isolation.In addition,previous studies of actuator fault identification have not dealt with multiple concurrent faults in real time,especially when these are accompanied by sudden failures under dynamic conditions.This study develops component-level models for fault identification in four typical actuators used in high-bypass ratio turbofan engines under both dynamic and steady-state conditions and these are then integrated with the engine performance model developed by the authors.The research results reported here present a novel method of quantifying actuator faults using dynamic effect compensation.The maximum error for each actuator is less than0.06%and 0.07%,with average computational time of less than 0.0058 s and 0.0086 s for steady-state and transient cases,respectively.These results confirm that the proposed method can accurately and efficiently identify concurrent actuator fault for an engine operating under either transient or steady-state conditions,even in the case of a sudden malfunction.The research results emonstrate the potential benefit to emergency response capabilities by introducing this method of monitoring the health of aero engines.展开更多
Dear Editor,H_(∞)This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot manipulators.There often exist mo...Dear Editor,H_(∞)This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot manipulators.There often exist model uncertainties between the nominal model and the real robot manipulator and disturbances. Hence, dealing with their effects plays a crucial role in leading to high tracking performances, as discussed in [1]–[5].展开更多
Although time-dependent deformation of geomaterials underpins slope-failure prediction models,the influence of strain rate on shearing strength and deformation behavior of loess remains unclear.The consolidated undrai...Although time-dependent deformation of geomaterials underpins slope-failure prediction models,the influence of strain rate on shearing strength and deformation behavior of loess remains unclear.The consolidated undrained(CU)and drained(CD)triaxial testing elucidated the impact of strain rate(0.005–0.3 mm/min)on strength envelopes,deformation moduli,pore pressures,and dilatancy characteristics of unsaturated and quasi-saturated loess.Under drained conditions with a controlled matric suction of 50 kPa,increasing strain rates from 0.005 mm/min to 0.011 mm/min induced decreases in failure deviatoric stress(qf),initial deformation modulus(Ei),and cohesion(c),while friction angles remained unaffected.Specimens displayed initial contractive volumetric strains transitioning to dilation across varying confining pressures.Higher rates diminished contractive volumetric strains and drainage volumes,indicating reduced densification and strength in the shear zone.Under undrained conditions,both unsaturated and quasi-saturated(pore pressure coefficient B=0.75)loess exhibited deteriorating mechanical properties with increasing rates from 0.03 mm/min to 0.3 mm/min.For unsaturated loess,reduced contractive volumetric strains at higher rates manifested relatively looser structures in the pre-peak stress phase.The strength decrement in quasi-saturated loess arose from elevated excess porewater pressures diminishing effective stresses.Negative porewater pressures emerged in quasi-saturated loess at lower confining pressures and strain rates.Compared to previous studies,the qf and Ei exhibited rate sensitivity below threshold values before attaining minima with marginal subsequent influence.The underlying mechanism mirrors the transition from creep to accelerated deformation phase of landslides.展开更多
Rechargeable zinc(Zn)-ion batteries(RZIBs) with hydrogel electrolytes(HEs) have gained significant attention in the last decade owing to their high safety, low cost, sufficient material abundance, and superb environme...Rechargeable zinc(Zn)-ion batteries(RZIBs) with hydrogel electrolytes(HEs) have gained significant attention in the last decade owing to their high safety, low cost, sufficient material abundance, and superb environmental friendliness, which is extremely important for wearable energy storage applications. Given that HEs play a critical role in building flexible RZIBs, it is urgent to summarize the recent advances in this field and elucidate the design principles of HEs for practical applications. This review systematically presents the development history, recent advances in the material fundamentals, functional designs, challenges, and prospects of the HEs-based RZIBs. Firstly, the fundamentals, species, and flexible mechanisms of HEs are discussed, along with their compatibility with Zn anodes and various cathodes. Then, the functional designs of hydrogel electrolytes in harsh conditions are comprehensively discussed, including high/low/wide-temperature windows, mechanical deformations(e.g., bending, twisting, and straining), and damages(e.g., cutting, burning, and soaking). Finally, the remaining challenges and future perspectives for advancing HEs-based RZIBs are outlined.展开更多
In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons ...In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons in source rocks of lacustrine shale,yet this aspect has received little attention.This paper,based on the case analysis,explores how preservation conditions influence the enrichment of mobile hydrocarbons in shale oil.Research showns that good preservation conditions play three key roles.(1)Ensure the retention of sufficient light hydrocarbons(C_(1)–C_(13)),medium hydrocarbons(C_(14)–C_(25))and small molecular aromatics(including 1–2 benzene rings)in the formation,which enhances the fluidity and flow of shale oil;(2)Maintain a high energy field(abnormally high pressure),thus facilitating the maximum outflow of shale oil;(3)Ensure that the retained hydrocarbons have the miscible flow condition of multi-component hydrocarbons(light hydrocarbons,medium hydrocarbons,heavy hydrocarbons,and heteroatomic compounds),so that the heavy hydrocarbons(C_(25+))and heavy components(non-hydrocarbons and asphaltenes)have improved fluidity and maximum flow capacity.In conclusion,in addition to the advantages of organic matter type,abundance,thermal maturity,and reservoir space,good preservation conditions of shale layers are essential for the formation of economically viable shale oil reservoirs,which should be incorporated into the evaluation criteria of shale oil-rich areas/segments and considered a necessary factor when selecting favorable exploration targets.展开更多
Ti(C,N)-Mo_(2)C-Ni cermet as alternative materials was explored for use in alkaline conditions,replacing the WC-Co cemented carbides,since Co is classified as a potentially carcinogenic substance and there is potentia...Ti(C,N)-Mo_(2)C-Ni cermet as alternative materials was explored for use in alkaline conditions,replacing the WC-Co cemented carbides,since Co is classified as a potentially carcinogenic substance and there is potential hazard of“hard metal disease”under the exposure to cobalt dust.The changes in microstructure,corrosion rate and volumetric loss rate of the two materials were compared under electrochemical corrosion and erosion-corrosion in alkaline environment.The results demonstrates that Ti(C,N)-Mo_(2)C-Ni cermet undergoes passivation when exposed to electrochemical corrosion of NaOH solution,resulting in a significant increase in oxygen content on the corroded surface.The corrosion rate of cermet is approximately one order of magnitude lower than that of the cemented carbide.Under the erosion-corrosion of an alkaline sand-water mixture,both the cermet and cemented carbide experience a gradual increase in volumetric loss rate with prolonging the erosion time.During erosion,the rim phase in cermet is fragile,so cracks easily penetrate it while the core phase remains intact.The medium-grained cemented carbide commonly demonstrates transgranular fracture mode,while in the fine-grained cemented carbide,cracks tend to propagate along phase boundaries.The erosive wear and damage caused by sand particles play a predominant role in the erosion-corrosion process of alkaline sand-water mixtures.This process represents an accelerated destructive phenomenon influenced and intensified by the combined effects of corrosion and erosion.It is confirmed that using cermet as an alternative anti-wear material to cemented carbides is feasible under alkaline conditions,and even better.展开更多
This paper critically re-examines the anthropocentric“Goldilocks Zone”paradigm that has dominated the search for extraterrestrial life.As of 2024,more than 5,500 exoplanets have been identified,yet only about 2%are ...This paper critically re-examines the anthropocentric“Goldilocks Zone”paradigm that has dominated the search for extraterrestrial life.As of 2024,more than 5,500 exoplanets have been identified,yet only about 2%are located within the traditionally defined habitable zone(National Aeronautics and Space Administration(NASA)Exoplanet Archive,2024;Kane et al.,2023).Moreover,the discovery of extremophiles-organisms thriving in high-radiation,extreme heat,or vacuum environments-demonstrates that the boundaries of life far exceed Earth-like conditions(Rothschild&Mancinelli,2001).展开更多
Nebkhas,which play a fundamental role in stabilizing ecosystems in arid and semi-arid regions,are currently threatened by global warming and anthropogenic activities.This study focuses on a tamarisk-nebkha profile sit...Nebkhas,which play a fundamental role in stabilizing ecosystems in arid and semi-arid regions,are currently threatened by global warming and anthropogenic activities.This study focuses on a tamarisk-nebkha profile situated in the lower reaches of the Shule River Basin,an arid region in northwestern China.Using radioactive dating and the physicochemical properties of sediments,this study reconstructed changes in the nebkha’s hydro-ecological conditions over the past decades.The results revealed a significant decline in fine particle fraction,carbonate content,and low-frequency magnetic susceptibility,along with a notable increase in the Si_(2)O_(3)/Al_(2)O_(3) ratio,since the 1990s.These findings indicate the intensification of the desertification process and the degradation of hydrological conditions within the nebkha.Primary factors contributing to these transformations include the steadily rising temperature,which leads to an increased evaporation rate,and a substantial rise in human water consumption.These indicate an elevated risk of future nebkha reactivation.This reactivation,in turn,could potentially accelerate the process of regional desertification and lead to an ecological crisis.展开更多
Objective:In this study,we evaluated the methodological quality of systematic reviews on acupuncture and moxibustion for the prevention and management of cancer-related conditions,aiming to provide evidence-based supp...Objective:In this study,we evaluated the methodological quality of systematic reviews on acupuncture and moxibustion for the prevention and management of cancer-related conditions,aiming to provide evidence-based support and establish levels of evidence for clinical application.Method:A comprehensive search was conducted to identify systematic reviews on acupuncture and mox-ibustion for the prevention and management of cancer-related conditions,covering databases including PubMed,Embase,Cochrane Library,Web of Science,China National Knowledge Infrastructure,Chinese Biomedical Databases,China Science and Technology Journal Database,and Wanfang Data,from their in-ception to August 1,2024.The methodological quality of the included systematic reviews was assessed by using AMSTAR 2,and bubble plots were employed to visualize the evidence.Results:Overall,137 systematic reviews were included,with China being the most prolific country,with 117 reviews.These reviews addressed 21 cancer-related conditions,with the three most frequently stud-ied being cancer-related fatigue(25 reviews),nausea and vomiting(20 reviews),and cancer pain(19 re-views).The three most commonly used acupuncture modalities were manual acupuncture(81 reviews),electroacupuncture(55 reviews),and moxibustion(39 reviews).Quality assessment revealed that one systematic review was rated as“high quality,”eight as“low quality,”and 128 as“critically low quality,”primarily due to the absence of protocol registration and lists of excluded studies.Conclusion:Acupuncture and moxibustion have shown potential efficacy in alleviating cancer-related con-ditions and treatment-related adverse effects,and their clinical use has been widely reported.However,the overall methodological quality of the included systematic reviews was low,limiting the reliability and the strength of the evidence.Future high-quality studies are needed to improve the quality of evidence and support the standardized application and broader promotion of acupuncture and moxibustion clinical practice.展开更多
Background:Low awareness of common pediatric eye conditions,such as amblyopia,conjunctivitis,and myopia in rural Chiang Rai,Thailand,prompted the development of a specialized curriculum.This curriculum aimed to provid...Background:Low awareness of common pediatric eye conditions,such as amblyopia,conjunctivitis,and myopia in rural Chiang Rai,Thailand,prompted the development of a specialized curriculum.This curriculum aimed to provide individuals serving these areas with resources to educate and disseminate information within their communities.Methods:A one-hour curriculum covering the causes,signs,diagnosis,treatment,and prevention of amblyopia,conjunctivitis,and myopia was delivered virtually to public health students at a Thai university and in-person to students at this university and rural community members.The in-person seminar included hands-on activities and simulations of these eye conditions.Knowledge acquisition and retention were assessed using pre-tests,immediate post-tests,and one-month post-tests.Results:The seminar was attended by 87 virtual public health students,111 in-person public health students,and 40 in-person rural community members.All groups showed significant improvement in test scores from pre-test to immediate post-test(P<0.001).In-person students had 1.57 times the odds of answering correctly on the immediate post-test compared to virtual students,despite no significant difference in baseline knowledge.However,the subset of in-person students who did not receive bilingual materials showed no significant difference in immediate post-test performance compared to virtual students(P>0.05).Although public health students had more than twice the odds of answering correctly at pre-test compared to rural community members,there were no significant differences between groups on the immediate post-test(P>0.05).Conclusion:A brief seminar significantly improved understanding and retention of pediatric eye conditions,achieving similar levels of understanding among public health students and rural community members,regardless of initial knowledge on this topic.In-person,hands-on seminars with educational materials in participants'preferred language proved more effective than virtual ones in achieving these improvements.展开更多
This research examines the impact of sulphate on pore water pressure(PWP)development in cement paste backfill(CPB)containing polycarboxylate ether(PES)superplasticizers under thermal-hydraulic-mechanical-chemical(THMC...This research examines the impact of sulphate on pore water pressure(PWP)development in cement paste backfill(CPB)containing polycarboxylate ether(PES)superplasticizers under thermal-hydraulic-mechanical-chemical(THMC)conditions that imitate actual field curing scenarios.PWP in CPB-PES,with and without sulphate,was assessed under non-isothermal field curing temperatures,varied drainage conditions,and curing stresses using a specially experimental setup.Key findings indicate that PWP behavior in CPB with PES under field conditions diverges markedly from standard laboratory conditions due to the significant effects of field curing temperatures,drainage conditions,and backfill self-weight.The study establishes that high sulphate ion concentrations notably increase initial PWP and slow its dissipation by interfering with the cement hydration process.This interference delays hydration,reduces pore water consumption,and lowers capillary pressure.Moreover,the results show that THMC conditions,especially non-isothermal field temperatures and varied drainage scenarios,considerably accelerate cement hydration compared to standard laboratory conditions,resulting in a more rapid decrease in PWP.Furthermore,improved drainage under THMC conditions mitigates the adverse effects of sulphates by facilitating sulphate ion removal,thus supporting more efficient cement hydration and CPB self-desiccation.The insights gained from this research are essential for understanding PWP behavior in sulphate-bearing CPB-PES in the field,developing predictive THMC models for backfill performance assessment,and enhancing the safety and effectiveness of mining backfills.展开更多
Adequate,safe and affordable housing and basic services for all are the basis for sustainable development,livelihood security and basic housing rights.Shelter is a basic human rights guarantee and improvements in livi...Adequate,safe and affordable housing and basic services for all are the basis for sustainable development,livelihood security and basic housing rights.Shelter is a basic human rights guarantee and improvements in living conditions are of significant importance to the quality of life.The article uses data from China’s fifth,sixth and seventh population censuses to reveal the spatial and temporal differences in the improvement of housing conditions of households in 281 cities in China from 2000 to 2020.The study concludes the following:(i)The housing conditions score of urban households in China has improved significantly,and the living environment has been significantly improved.The center of gravity of the overall housing conditions score shifts from the western region to the eastern region and then to the central region.(ii)The housing facilities in China’s cities have become increasingly sophisticated during the study period.The overall variation in housing amenities tends to decrease overall,with higher intra-belt variation than inter-belt variation in the four main regions.(iii)Self-built housing,rented housing,purchased housing,other types of housing and inherited housing are the main sources of housing for urban househ olds in China.From 2000 to 2020,the housing structure is characterized by two increases and one decrease,namely an increase in the proportion of purchased and rented housing and a decrease in the proportion of self-built housing.(iv)The main factors influencing the improvement of housing conditions are historical factors,the forces of marketization,urbanization,and housing policy.展开更多
This study explores the adaptation of microbial enzymatic techniques,which were originally developed to eliminate amino impurities in alcoholic beverages,for stabilizing strongly alkaline sodium-based dispersive soils...This study explores the adaptation of microbial enzymatic techniques,which were originally developed to eliminate amino impurities in alcoholic beverages,for stabilizing strongly alkaline sodium-based dispersive soils from check dams.Employing acid urease from Lactobacillus reuteri(L.reuteri)and a control group using soybean-derived urease,this research aimed to modify soil alkalinity through biomineralization.Ultraviolet(UV)mutagenesis optimized L.reuteri strains for biomass and activity.Solution experiments were conducted to assess the effects of pH,temperature,and storage duration on urease activity and to evaluate the calcium carbonate production and crystal morphology of the two ureases under varying calcium ion concentrations.Dispersivity identificationtests and tensile strength evaluations were conducted to analyze the disparities in the modifieddispersive soil treated with the two types of ureases.The results showed that soybean urease should be stored under low-temperature conditions and a neutral pH,whereas acid urease from L.reuteri can be stored at room temperature across a range of pH levels.Both urease treatments effectively reduced soil dispersivity and improved tensile strength significantly(up to 94%and 177%,respectively),with acid urease from L.reuteri resulting in superior soil strengthening and ammonia regulation.These findingssuggest that treating alkaline dispersive soils with acid urease is an efficientand eco-friendly method.展开更多
Bacillus cereus is a significant pathogen responsible for toxin-induced foodborne diseases,and is widely distributed in the natural environment.B.cereus biofilm formation is regulated by multifactorial interactions,de...Bacillus cereus is a significant pathogen responsible for toxin-induced foodborne diseases,and is widely distributed in the natural environment.B.cereus biofilm formation is regulated by multifactorial interactions,demonstrating dynamic adaptability to environmental cues.In this study,crystal violet staining and MTT staining methods were employed to conduct an indepth investigation into the biofilm formation and metabolic activity changes of five strains of B.cereus in different culture media and with various culture conditions.Experimental data indicated that the composition of the culture medium,the length of incubation time,and the fluctuation of temperature all had a significant impact on the biofilm formation of B.cereus,and this impact exhibited obvious differences among different strains.This result provides a solid experimental basis for deeply elucidating the internal regulatory mechanism of B.cereus biofilm formation and the change principles of metabolic activity.展开更多
The Northeast Plain in China ranks among the top five regions that have been significantly impacted by haze pollution.To effectively control pollution,it is crucial to accurately assess the effects of emission reducti...The Northeast Plain in China ranks among the top five regions that have been significantly impacted by haze pollution.To effectively control pollution,it is crucial to accurately assess the effects of emission reduction measures.In this study,we analyzed surveillance data and found substantial decreases(ranging from 19.0%to 50.1%)in average annual mass concentrations of key pollutants(such as CO,SO_(2),NO_(2),and PM_(2.5))in the Northeast Plain from 2016 to 2020.To precisely determine the contributions of meteorological conditions and emission reductions to the improvement of air quality in the Northeast Plain,we conducted three scenario simulations.By comparing source emissions in December 2016 and 2020 using the WRF-Chem model(except for SO_(2)),we observed significant reductions of 21.3%,8.8%,and 9.8%in mass concentrations of PM_(2.5),NO_(2),and CO,respectively,from 2016 to 2020.This highlights the essential role that meteorological conditions play in determining air quality in the Northeast Plain.Moreover,further reducing source emissions by 30%in December 2016 resulted in subsequent reductions of 25.3%,29.0%,4.5%,and 30.3%in mass concentrations of PM_(2.5),SO_(2),NO_(2),and CO,respectively,under the same meteorological conditions.Notably,source emission reduction was effective for PM_(2.5),SO_(2),and CO,but not for NO_(2).The improvement in air quality in the Northeast Plain from 2016 to 2020 can be attributed to the combined effects of improved meteorological conditions and reduced pollution sources.展开更多
Numerous slope failures have been reported during periods of water level fluctuations.Understanding the influence of water on the creep behavior of joints is essential for evaluating the long-term stability of slopes....Numerous slope failures have been reported during periods of water level fluctuations.Understanding the influence of water on the creep behavior of joints is essential for evaluating the long-term stability of slopes.This study focuses on the effects of drying-wetting cycles and soaking conditions on the long-term behavior of sandstone joints.A total of 12 multi-stage shear creep tests are carried out on sandstone joints subjected to varying drying-wetting cycles under both soaking and un-soaking conditions.Based on the experimental results,the influences of drying-wetting cycles as well as soaking conditions on the microstructure,shear creep displacement,strength,and failure morphologies of sandstone joints are investigated comprehensively.Results indicate that increasing drying-wetting cycles not only yields larger shear creep displacements but also leads to a negative exponential decrease in the strength of sandstone joints.Besides,soaking conditions strongly influence the creep behavior of sandstone joints.The failure strength and long-term strength of sandstone joints for soaked samples decrease by 13.6%–29.0%and 19.4%–37.5%,respectively,as compared to unsoaked samples.Furthermore,four distinct stages in the shear creep process were identified according to the results obtained from multi-stage shear creep tests and computerized tomography scans,and three creep failure modes of sandstone joints are thus determined.Finally,the influence mechanism of drying-wetting cycles and soaking conditions on the creep failure modes of sandstone joints is revealed.Drying-wetting cycles and soaking conditions diminish the influence of asperities on the shear creep behavior of joints,thereby reducing the resistance of joints to long-term deformation.展开更多
Based on the data of temperature,precipitation and sunshine at Longhui National Station from 1981 to 2023,the temperature data at 22 regional stations from 2011 to 2023,and lily planting data at Lilium brownii var.vir...Based on the data of temperature,precipitation and sunshine at Longhui National Station from 1981 to 2023,the temperature data at 22 regional stations from 2011 to 2023,and lily planting data at Lilium brownii var.viridulum base,the feasibility of meteorological conditions for the growth of L.brownii var.viridulum was analyzed.The results showed that the climatic conditions in Longhui were generally suitable for planting L.brownii var.viridulum.The southern hilly area was the most suitable climate area,the northern mountainous area was the suitable climate area,and the northwest mountainous area was the more suitable climate area.It can provide favorable meteorological protection for farmers,reduce the impact of adverse meteorological conditions on L.brownii var.viridulum,and improve the economic benefits of lily production by making full use of Longhui climatic conditions and doing a good job in the meteorological service of L.brownii var.viridulum.展开更多
Based on the environmental conditions for the growth and development of potatoes,the impact of climatic conditions on potato cultivation in Shangdu County was analyzed.Due to significant fluctuations in temperature du...Based on the environmental conditions for the growth and development of potatoes,the impact of climatic conditions on potato cultivation in Shangdu County was analyzed.Due to significant fluctuations in temperature during the seedling stage of potatoes,less precipitation,and uneven temporal and spatial distribution of precipitation,the yield of potatoes is unstable.Therefore,scientific planting suggestions and meteorological service countermeasures were proposed.展开更多
The extreme conditions severely constrain the dynamic characteristics of aircraft landing gear retraction mechanism(ALGRM).This paper proposes a dynamic modeling and analysis method for ALGRM considering the coupling ...The extreme conditions severely constrain the dynamic characteristics of aircraft landing gear retraction mechanism(ALGRM).This paper proposes a dynamic modeling and analysis method for ALGRM considering the coupling effects of extreme conditions such as clearance joints,flexible rods,and salt spray corrosion.Firstly,the mathematical model for clearance joint and flexible rod is established and the dynamic model of ALGRM considering clearance joints and flexible rods is formulated based on Lagrangian equation.Furthermore,the salt spray corrosion model for clearance joint is developed using COMSOL simulation software.Finally,the effects of different temperatures and relative humidities on the corrosion depth of clearance joint and the dynamic characteristics of ALGRM under the coupling effects of extreme conditions are investigated.The results have found that the impact of extreme conditions on dynamics of system cannot be ignored.This study not only provides a theoretical foundation for predicting the dynamic characteristics of ALGRM under extreme conditions but also offers insights for the optimization design and corrosion protection efforts of landing gear.展开更多
Current models of national conditions education for international students often fall short in facilitating their transition from passive observers of culture to active communicators.Using Beijing International Studie...Current models of national conditions education for international students often fall short in facilitating their transition from passive observers of culture to active communicators.Using Beijing International Studies University as a case study,this paper examines how a systematic educational model enables international students to shift from passive observation to active narration of Chinese society and culture.The study identifies and elaborates on three core mechanisms of this model:an institutional integration mechanism centered on convergent management,a practical cognition mechanism through experiential learning,and a narrative empowerment mechanism utilizing converged media platforms.Together,these components form a glocalized educational framework that integrates global issues with local practices,connecting macro narratives with personal experiences.Case analysis demonstrates that by immersing students in authentic sociocultural contexts and granting them narrative agency,this model effectively fosters deep understanding and cross-cultural identity.It thus provides a new theoretical framework and practical pathway for reconstructing international student education in China with an emphasis on student agency and interculturality.展开更多
基金support by the National Natural Science Foundation of China(Grant No.52402520)。
文摘Actuator faults can be critical in turbofan engines as they can lead to stall,surge,loss of thrust and failure of speed control.Thus,fault diagnosis of gas turbine actuators has attracted considerable attention,from both academia and industry.However,the extensive literature that exists on this topic does not address identifying the severity of actuator faults and focuses mainly on actuator fault detection and isolation.In addition,previous studies of actuator fault identification have not dealt with multiple concurrent faults in real time,especially when these are accompanied by sudden failures under dynamic conditions.This study develops component-level models for fault identification in four typical actuators used in high-bypass ratio turbofan engines under both dynamic and steady-state conditions and these are then integrated with the engine performance model developed by the authors.The research results reported here present a novel method of quantifying actuator faults using dynamic effect compensation.The maximum error for each actuator is less than0.06%and 0.07%,with average computational time of less than 0.0058 s and 0.0086 s for steady-state and transient cases,respectively.These results confirm that the proposed method can accurately and efficiently identify concurrent actuator fault for an engine operating under either transient or steady-state conditions,even in the case of a sudden malfunction.The research results emonstrate the potential benefit to emergency response capabilities by introducing this method of monitoring the health of aero engines.
基金support by “R&D Program for Forest Science Technology(RS-2024-0040 3460)” provided by Korea Forest Service(Korea Forestry Promotion Institute)
文摘Dear Editor,H_(∞)This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot manipulators.There often exist model uncertainties between the nominal model and the real robot manipulator and disturbances. Hence, dealing with their effects plays a crucial role in leading to high tracking performances, as discussed in [1]–[5].
文摘Although time-dependent deformation of geomaterials underpins slope-failure prediction models,the influence of strain rate on shearing strength and deformation behavior of loess remains unclear.The consolidated undrained(CU)and drained(CD)triaxial testing elucidated the impact of strain rate(0.005–0.3 mm/min)on strength envelopes,deformation moduli,pore pressures,and dilatancy characteristics of unsaturated and quasi-saturated loess.Under drained conditions with a controlled matric suction of 50 kPa,increasing strain rates from 0.005 mm/min to 0.011 mm/min induced decreases in failure deviatoric stress(qf),initial deformation modulus(Ei),and cohesion(c),while friction angles remained unaffected.Specimens displayed initial contractive volumetric strains transitioning to dilation across varying confining pressures.Higher rates diminished contractive volumetric strains and drainage volumes,indicating reduced densification and strength in the shear zone.Under undrained conditions,both unsaturated and quasi-saturated(pore pressure coefficient B=0.75)loess exhibited deteriorating mechanical properties with increasing rates from 0.03 mm/min to 0.3 mm/min.For unsaturated loess,reduced contractive volumetric strains at higher rates manifested relatively looser structures in the pre-peak stress phase.The strength decrement in quasi-saturated loess arose from elevated excess porewater pressures diminishing effective stresses.Negative porewater pressures emerged in quasi-saturated loess at lower confining pressures and strain rates.Compared to previous studies,the qf and Ei exhibited rate sensitivity below threshold values before attaining minima with marginal subsequent influence.The underlying mechanism mirrors the transition from creep to accelerated deformation phase of landslides.
基金supported by the National Natural Science Foundation of China (22379038)Science Research Project of Hebei Education Department (JZX2024015)+4 种基金Shijiazhuang Science and Technology Plan Project (241791357A)Central Guidance for Local Science and Technology Development Funds Project (246Z4408G)Excellent Youth Research Innovation Team of Hebei University (QNTD202410)High-level Talents Research Start-Up Project of Hebei University (521100224223)Hebei Province Innovation Capability Enhancement Plan Project (22567620H)。
文摘Rechargeable zinc(Zn)-ion batteries(RZIBs) with hydrogel electrolytes(HEs) have gained significant attention in the last decade owing to their high safety, low cost, sufficient material abundance, and superb environmental friendliness, which is extremely important for wearable energy storage applications. Given that HEs play a critical role in building flexible RZIBs, it is urgent to summarize the recent advances in this field and elucidate the design principles of HEs for practical applications. This review systematically presents the development history, recent advances in the material fundamentals, functional designs, challenges, and prospects of the HEs-based RZIBs. Firstly, the fundamentals, species, and flexible mechanisms of HEs are discussed, along with their compatibility with Zn anodes and various cathodes. Then, the functional designs of hydrogel electrolytes in harsh conditions are comprehensively discussed, including high/low/wide-temperature windows, mechanical deformations(e.g., bending, twisting, and straining), and damages(e.g., cutting, burning, and soaking). Finally, the remaining challenges and future perspectives for advancing HEs-based RZIBs are outlined.
基金Supported by the National Natural Science Foundation of China(U22B6004)Project of PetroChina Research Institute of Petroleum Exploration and Development(2022yjcq03)Core Technology Key Project of China Petroleum Changqing Oilfield Company(KJZX2023-01).
文摘In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons in source rocks of lacustrine shale,yet this aspect has received little attention.This paper,based on the case analysis,explores how preservation conditions influence the enrichment of mobile hydrocarbons in shale oil.Research showns that good preservation conditions play three key roles.(1)Ensure the retention of sufficient light hydrocarbons(C_(1)–C_(13)),medium hydrocarbons(C_(14)–C_(25))and small molecular aromatics(including 1–2 benzene rings)in the formation,which enhances the fluidity and flow of shale oil;(2)Maintain a high energy field(abnormally high pressure),thus facilitating the maximum outflow of shale oil;(3)Ensure that the retained hydrocarbons have the miscible flow condition of multi-component hydrocarbons(light hydrocarbons,medium hydrocarbons,heavy hydrocarbons,and heteroatomic compounds),so that the heavy hydrocarbons(C_(25+))and heavy components(non-hydrocarbons and asphaltenes)have improved fluidity and maximum flow capacity.In conclusion,in addition to the advantages of organic matter type,abundance,thermal maturity,and reservoir space,good preservation conditions of shale layers are essential for the formation of economically viable shale oil reservoirs,which should be incorporated into the evaluation criteria of shale oil-rich areas/segments and considered a necessary factor when selecting favorable exploration targets.
基金Chongqing Light Alloy Materials and Processing Engineering Technology Research Center Open Fund Project(GCZX201903)Yunnan Province Major Science and Technology Special Project Plan(202302AA310038)Sichuan University-Suining Municipal-University Cooperation Project(2023CDSN-12)。
文摘Ti(C,N)-Mo_(2)C-Ni cermet as alternative materials was explored for use in alkaline conditions,replacing the WC-Co cemented carbides,since Co is classified as a potentially carcinogenic substance and there is potential hazard of“hard metal disease”under the exposure to cobalt dust.The changes in microstructure,corrosion rate and volumetric loss rate of the two materials were compared under electrochemical corrosion and erosion-corrosion in alkaline environment.The results demonstrates that Ti(C,N)-Mo_(2)C-Ni cermet undergoes passivation when exposed to electrochemical corrosion of NaOH solution,resulting in a significant increase in oxygen content on the corroded surface.The corrosion rate of cermet is approximately one order of magnitude lower than that of the cemented carbide.Under the erosion-corrosion of an alkaline sand-water mixture,both the cermet and cemented carbide experience a gradual increase in volumetric loss rate with prolonging the erosion time.During erosion,the rim phase in cermet is fragile,so cracks easily penetrate it while the core phase remains intact.The medium-grained cemented carbide commonly demonstrates transgranular fracture mode,while in the fine-grained cemented carbide,cracks tend to propagate along phase boundaries.The erosive wear and damage caused by sand particles play a predominant role in the erosion-corrosion process of alkaline sand-water mixtures.This process represents an accelerated destructive phenomenon influenced and intensified by the combined effects of corrosion and erosion.It is confirmed that using cermet as an alternative anti-wear material to cemented carbides is feasible under alkaline conditions,and even better.
文摘This paper critically re-examines the anthropocentric“Goldilocks Zone”paradigm that has dominated the search for extraterrestrial life.As of 2024,more than 5,500 exoplanets have been identified,yet only about 2%are located within the traditionally defined habitable zone(National Aeronautics and Space Administration(NASA)Exoplanet Archive,2024;Kane et al.,2023).Moreover,the discovery of extremophiles-organisms thriving in high-radiation,extreme heat,or vacuum environments-demonstrates that the boundaries of life far exceed Earth-like conditions(Rothschild&Mancinelli,2001).
基金National Natural Science Foundation of ChinaNo.41401005,No.42307555+3 种基金Chinese Academy of Geological Sciences Basal Research FundNo.JKYQN202418,No.YK202405Project of the China Geological SurveyNo.DD20230459。
文摘Nebkhas,which play a fundamental role in stabilizing ecosystems in arid and semi-arid regions,are currently threatened by global warming and anthropogenic activities.This study focuses on a tamarisk-nebkha profile situated in the lower reaches of the Shule River Basin,an arid region in northwestern China.Using radioactive dating and the physicochemical properties of sediments,this study reconstructed changes in the nebkha’s hydro-ecological conditions over the past decades.The results revealed a significant decline in fine particle fraction,carbonate content,and low-frequency magnetic susceptibility,along with a notable increase in the Si_(2)O_(3)/Al_(2)O_(3) ratio,since the 1990s.These findings indicate the intensification of the desertification process and the degradation of hydrological conditions within the nebkha.Primary factors contributing to these transformations include the steadily rising temperature,which leads to an increased evaporation rate,and a substantial rise in human water consumption.These indicate an elevated risk of future nebkha reactivation.This reactivation,in turn,could potentially accelerate the process of regional desertification and lead to an ecological crisis.
基金Supported by WFAS 2023 International Standard Project of Acupuncture-Moxibustion:WFASRP2023-SC05Tianjin Nankai District Pilot Demonstration Project for Integrated Inheritance and Innovation of Traditional Chinese Medicine:20250102001Beijing Natural Science:7252224。
文摘Objective:In this study,we evaluated the methodological quality of systematic reviews on acupuncture and moxibustion for the prevention and management of cancer-related conditions,aiming to provide evidence-based support and establish levels of evidence for clinical application.Method:A comprehensive search was conducted to identify systematic reviews on acupuncture and mox-ibustion for the prevention and management of cancer-related conditions,covering databases including PubMed,Embase,Cochrane Library,Web of Science,China National Knowledge Infrastructure,Chinese Biomedical Databases,China Science and Technology Journal Database,and Wanfang Data,from their in-ception to August 1,2024.The methodological quality of the included systematic reviews was assessed by using AMSTAR 2,and bubble plots were employed to visualize the evidence.Results:Overall,137 systematic reviews were included,with China being the most prolific country,with 117 reviews.These reviews addressed 21 cancer-related conditions,with the three most frequently stud-ied being cancer-related fatigue(25 reviews),nausea and vomiting(20 reviews),and cancer pain(19 re-views).The three most commonly used acupuncture modalities were manual acupuncture(81 reviews),electroacupuncture(55 reviews),and moxibustion(39 reviews).Quality assessment revealed that one systematic review was rated as“high quality,”eight as“low quality,”and 128 as“critically low quality,”primarily due to the absence of protocol registration and lists of excluded studies.Conclusion:Acupuncture and moxibustion have shown potential efficacy in alleviating cancer-related con-ditions and treatment-related adverse effects,and their clinical use has been widely reported.However,the overall methodological quality of the included systematic reviews was low,limiting the reliability and the strength of the evidence.Future high-quality studies are needed to improve the quality of evidence and support the standardized application and broader promotion of acupuncture and moxibustion clinical practice.
基金supported by the National Institutes of Health(Bethesda,MD)through the P30 EY010572 core grantthe Malcolm M.Marquis,MD Endowed Fund for Innovation+1 种基金an unrestricted grant from Research to Prevent Blindness(New York,NY)to the Casey Eye Institute,Oregon Health&Science UniversityAdditional support was provided by Oregon Health&Science University Global Health。
文摘Background:Low awareness of common pediatric eye conditions,such as amblyopia,conjunctivitis,and myopia in rural Chiang Rai,Thailand,prompted the development of a specialized curriculum.This curriculum aimed to provide individuals serving these areas with resources to educate and disseminate information within their communities.Methods:A one-hour curriculum covering the causes,signs,diagnosis,treatment,and prevention of amblyopia,conjunctivitis,and myopia was delivered virtually to public health students at a Thai university and in-person to students at this university and rural community members.The in-person seminar included hands-on activities and simulations of these eye conditions.Knowledge acquisition and retention were assessed using pre-tests,immediate post-tests,and one-month post-tests.Results:The seminar was attended by 87 virtual public health students,111 in-person public health students,and 40 in-person rural community members.All groups showed significant improvement in test scores from pre-test to immediate post-test(P<0.001).In-person students had 1.57 times the odds of answering correctly on the immediate post-test compared to virtual students,despite no significant difference in baseline knowledge.However,the subset of in-person students who did not receive bilingual materials showed no significant difference in immediate post-test performance compared to virtual students(P>0.05).Although public health students had more than twice the odds of answering correctly at pre-test compared to rural community members,there were no significant differences between groups on the immediate post-test(P>0.05).Conclusion:A brief seminar significantly improved understanding and retention of pediatric eye conditions,achieving similar levels of understanding among public health students and rural community members,regardless of initial knowledge on this topic.In-person,hands-on seminars with educational materials in participants'preferred language proved more effective than virtual ones in achieving these improvements.
文摘This research examines the impact of sulphate on pore water pressure(PWP)development in cement paste backfill(CPB)containing polycarboxylate ether(PES)superplasticizers under thermal-hydraulic-mechanical-chemical(THMC)conditions that imitate actual field curing scenarios.PWP in CPB-PES,with and without sulphate,was assessed under non-isothermal field curing temperatures,varied drainage conditions,and curing stresses using a specially experimental setup.Key findings indicate that PWP behavior in CPB with PES under field conditions diverges markedly from standard laboratory conditions due to the significant effects of field curing temperatures,drainage conditions,and backfill self-weight.The study establishes that high sulphate ion concentrations notably increase initial PWP and slow its dissipation by interfering with the cement hydration process.This interference delays hydration,reduces pore water consumption,and lowers capillary pressure.Moreover,the results show that THMC conditions,especially non-isothermal field temperatures and varied drainage scenarios,considerably accelerate cement hydration compared to standard laboratory conditions,resulting in a more rapid decrease in PWP.Furthermore,improved drainage under THMC conditions mitigates the adverse effects of sulphates by facilitating sulphate ion removal,thus supporting more efficient cement hydration and CPB self-desiccation.The insights gained from this research are essential for understanding PWP behavior in sulphate-bearing CPB-PES in the field,developing predictive THMC models for backfill performance assessment,and enhancing the safety and effectiveness of mining backfills.
基金Project of Philosophy and Social Science of Shanghai“Study on the Role of Population Ageing on Economic Growth in the Yangtze River Delta Urban Agglomeration”(2023ZSH002).
文摘Adequate,safe and affordable housing and basic services for all are the basis for sustainable development,livelihood security and basic housing rights.Shelter is a basic human rights guarantee and improvements in living conditions are of significant importance to the quality of life.The article uses data from China’s fifth,sixth and seventh population censuses to reveal the spatial and temporal differences in the improvement of housing conditions of households in 281 cities in China from 2000 to 2020.The study concludes the following:(i)The housing conditions score of urban households in China has improved significantly,and the living environment has been significantly improved.The center of gravity of the overall housing conditions score shifts from the western region to the eastern region and then to the central region.(ii)The housing facilities in China’s cities have become increasingly sophisticated during the study period.The overall variation in housing amenities tends to decrease overall,with higher intra-belt variation than inter-belt variation in the four main regions.(iii)Self-built housing,rented housing,purchased housing,other types of housing and inherited housing are the main sources of housing for urban househ olds in China.From 2000 to 2020,the housing structure is characterized by two increases and one decrease,namely an increase in the proportion of purchased and rented housing and a decrease in the proportion of self-built housing.(iv)The main factors influencing the improvement of housing conditions are historical factors,the forces of marketization,urbanization,and housing policy.
基金financiallysupported by the National Natural Science Foundation of China(Grant Nos.52079116,52108343,and 51579215).
文摘This study explores the adaptation of microbial enzymatic techniques,which were originally developed to eliminate amino impurities in alcoholic beverages,for stabilizing strongly alkaline sodium-based dispersive soils from check dams.Employing acid urease from Lactobacillus reuteri(L.reuteri)and a control group using soybean-derived urease,this research aimed to modify soil alkalinity through biomineralization.Ultraviolet(UV)mutagenesis optimized L.reuteri strains for biomass and activity.Solution experiments were conducted to assess the effects of pH,temperature,and storage duration on urease activity and to evaluate the calcium carbonate production and crystal morphology of the two ureases under varying calcium ion concentrations.Dispersivity identificationtests and tensile strength evaluations were conducted to analyze the disparities in the modifieddispersive soil treated with the two types of ureases.The results showed that soybean urease should be stored under low-temperature conditions and a neutral pH,whereas acid urease from L.reuteri can be stored at room temperature across a range of pH levels.Both urease treatments effectively reduced soil dispersivity and improved tensile strength significantly(up to 94%and 177%,respectively),with acid urease from L.reuteri resulting in superior soil strengthening and ammonia regulation.These findingssuggest that treating alkaline dispersive soils with acid urease is an efficientand eco-friendly method.
基金supported by the National Key R&D Pro-gram of China(No.2022YFD1301003)the Shandong Modern Agricultural Technology and Industry System(No.SDAIT-11-11)+4 种基金the Marine Science and Technology Innovation Project of Qingdao(No.24-1-3-hygg-25-hy)the Cooperative Scientific Research Project‘Chunhui Plan’of the Ministry of Education of PRC(No.HZKY 20220481)the Open Foundation of State Key Laboratory of Marine Food Processing&Safety Control(No.SKL202408)the Shandong Province Grant for Distin-guished Young Scholars(No.ZR2022JQ15)the Young Taishan Scholars Program of Shandong Province(No.tsqn202103094)。
文摘Bacillus cereus is a significant pathogen responsible for toxin-induced foodborne diseases,and is widely distributed in the natural environment.B.cereus biofilm formation is regulated by multifactorial interactions,demonstrating dynamic adaptability to environmental cues.In this study,crystal violet staining and MTT staining methods were employed to conduct an indepth investigation into the biofilm formation and metabolic activity changes of five strains of B.cereus in different culture media and with various culture conditions.Experimental data indicated that the composition of the culture medium,the length of incubation time,and the fluctuation of temperature all had a significant impact on the biofilm formation of B.cereus,and this impact exhibited obvious differences among different strains.This result provides a solid experimental basis for deeply elucidating the internal regulatory mechanism of B.cereus biofilm formation and the change principles of metabolic activity.
基金supported by the National Key R&D Program of China(No.2022YFF0802501)the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2022416)+1 种基金the Natural Science Basic Research Program of Shaanxi(No.2022JQ-267)the State Key Laboratory of Loess and Quaternary Geology(No.SKLLQG2335).
文摘The Northeast Plain in China ranks among the top five regions that have been significantly impacted by haze pollution.To effectively control pollution,it is crucial to accurately assess the effects of emission reduction measures.In this study,we analyzed surveillance data and found substantial decreases(ranging from 19.0%to 50.1%)in average annual mass concentrations of key pollutants(such as CO,SO_(2),NO_(2),and PM_(2.5))in the Northeast Plain from 2016 to 2020.To precisely determine the contributions of meteorological conditions and emission reductions to the improvement of air quality in the Northeast Plain,we conducted three scenario simulations.By comparing source emissions in December 2016 and 2020 using the WRF-Chem model(except for SO_(2)),we observed significant reductions of 21.3%,8.8%,and 9.8%in mass concentrations of PM_(2.5),NO_(2),and CO,respectively,from 2016 to 2020.This highlights the essential role that meteorological conditions play in determining air quality in the Northeast Plain.Moreover,further reducing source emissions by 30%in December 2016 resulted in subsequent reductions of 25.3%,29.0%,4.5%,and 30.3%in mass concentrations of PM_(2.5),SO_(2),NO_(2),and CO,respectively,under the same meteorological conditions.Notably,source emission reduction was effective for PM_(2.5),SO_(2),and CO,but not for NO_(2).The improvement in air quality in the Northeast Plain from 2016 to 2020 can be attributed to the combined effects of improved meteorological conditions and reduced pollution sources.
基金financial support from the National Natural Science Foundation of China(Grant Nos.52479108,52408391)the Fundamental Research Funds for the Central Universities(2042024kf0032)+1 种基金the Postdoctoral Fellowship Program(Grade C)of China Postdoctoral Science Foundation(Grant No.GZC20241283)the Natural Science Foundation of Hubei Province,China(No.2024AFB160)。
文摘Numerous slope failures have been reported during periods of water level fluctuations.Understanding the influence of water on the creep behavior of joints is essential for evaluating the long-term stability of slopes.This study focuses on the effects of drying-wetting cycles and soaking conditions on the long-term behavior of sandstone joints.A total of 12 multi-stage shear creep tests are carried out on sandstone joints subjected to varying drying-wetting cycles under both soaking and un-soaking conditions.Based on the experimental results,the influences of drying-wetting cycles as well as soaking conditions on the microstructure,shear creep displacement,strength,and failure morphologies of sandstone joints are investigated comprehensively.Results indicate that increasing drying-wetting cycles not only yields larger shear creep displacements but also leads to a negative exponential decrease in the strength of sandstone joints.Besides,soaking conditions strongly influence the creep behavior of sandstone joints.The failure strength and long-term strength of sandstone joints for soaked samples decrease by 13.6%–29.0%and 19.4%–37.5%,respectively,as compared to unsoaked samples.Furthermore,four distinct stages in the shear creep process were identified according to the results obtained from multi-stage shear creep tests and computerized tomography scans,and three creep failure modes of sandstone joints are thus determined.Finally,the influence mechanism of drying-wetting cycles and soaking conditions on the creep failure modes of sandstone joints is revealed.Drying-wetting cycles and soaking conditions diminish the influence of asperities on the shear creep behavior of joints,thereby reducing the resistance of joints to long-term deformation.
文摘Based on the data of temperature,precipitation and sunshine at Longhui National Station from 1981 to 2023,the temperature data at 22 regional stations from 2011 to 2023,and lily planting data at Lilium brownii var.viridulum base,the feasibility of meteorological conditions for the growth of L.brownii var.viridulum was analyzed.The results showed that the climatic conditions in Longhui were generally suitable for planting L.brownii var.viridulum.The southern hilly area was the most suitable climate area,the northern mountainous area was the suitable climate area,and the northwest mountainous area was the more suitable climate area.It can provide favorable meteorological protection for farmers,reduce the impact of adverse meteorological conditions on L.brownii var.viridulum,and improve the economic benefits of lily production by making full use of Longhui climatic conditions and doing a good job in the meteorological service of L.brownii var.viridulum.
文摘Based on the environmental conditions for the growth and development of potatoes,the impact of climatic conditions on potato cultivation in Shangdu County was analyzed.Due to significant fluctuations in temperature during the seedling stage of potatoes,less precipitation,and uneven temporal and spatial distribution of precipitation,the yield of potatoes is unstable.Therefore,scientific planting suggestions and meteorological service countermeasures were proposed.
基金supported by the National Natural Science Foundation of China(Grant No.51875086)Sichuan Science and Technology Program(Grant No.2023NSFSC0866).
文摘The extreme conditions severely constrain the dynamic characteristics of aircraft landing gear retraction mechanism(ALGRM).This paper proposes a dynamic modeling and analysis method for ALGRM considering the coupling effects of extreme conditions such as clearance joints,flexible rods,and salt spray corrosion.Firstly,the mathematical model for clearance joint and flexible rod is established and the dynamic model of ALGRM considering clearance joints and flexible rods is formulated based on Lagrangian equation.Furthermore,the salt spray corrosion model for clearance joint is developed using COMSOL simulation software.Finally,the effects of different temperatures and relative humidities on the corrosion depth of clearance joint and the dynamic characteristics of ALGRM under the coupling effects of extreme conditions are investigated.The results have found that the impact of extreme conditions on dynamics of system cannot be ignored.This study not only provides a theoretical foundation for predicting the dynamic characteristics of ALGRM under extreme conditions but also offers insights for the optimization design and corrosion protection efforts of landing gear.
文摘Current models of national conditions education for international students often fall short in facilitating their transition from passive observers of culture to active communicators.Using Beijing International Studies University as a case study,this paper examines how a systematic educational model enables international students to shift from passive observation to active narration of Chinese society and culture.The study identifies and elaborates on three core mechanisms of this model:an institutional integration mechanism centered on convergent management,a practical cognition mechanism through experiential learning,and a narrative empowerment mechanism utilizing converged media platforms.Together,these components form a glocalized educational framework that integrates global issues with local practices,connecting macro narratives with personal experiences.Case analysis demonstrates that by immersing students in authentic sociocultural contexts and granting them narrative agency,this model effectively fosters deep understanding and cross-cultural identity.It thus provides a new theoretical framework and practical pathway for reconstructing international student education in China with an emphasis on student agency and interculturality.
