期刊文献+
共找到142,898篇文章
< 1 2 250 >
每页显示 20 50 100
Impact of tourists' pro-environmental behavior based on planned behavior theory: A case of Xixi Wetland in Hangzhou
1
作者 HUANG Xi-kai LIN Tong-tao GU Ya-qing 《Ecological Economy》 2025年第2期184-198,共15页
Under the joint influence of the tourism boom brought by the Hangzhou Asian Games and the concept of"green mountains and clear waters are as valuable as mountains of gold and silver",research on tourists'... Under the joint influence of the tourism boom brought by the Hangzhou Asian Games and the concept of"green mountains and clear waters are as valuable as mountains of gold and silver",research on tourists'pro-environmental behavior has become particularly important.This study not only expands the application scope of the Theory of Planned Behavior,but also provides reference for promoting the brand of Xixi Wetland The study takes the Xixi Wetland in Hangzhou as a case study,with scenic tourists as the research subjects.Through questionnaire surveys,first-hand information was obtained,and the sample was analyzed using SPSSPRO software.Structural equation modeling analysis was also completed using SPSSPRO software.Research has shown that:(1)environmental responsibility has a positive impact on pro-environmental behavior intentions;(2)Local attachment positively influences pro-environmental behavior intentions;(3)Tourists'attitudes have a positive impact on local attachment;(4)Subjective norms have a positive impact on environmental responsibility;(5)Perceived behavioral control has a positive impact on environmental responsibility.This study provides a reference for future research on pro-environmental behavior and the application of planned behavior theory. 展开更多
关键词 pro-environmental behavior theory of planned behavior Xixi Wetland INFLUENCE
原文传递
Misperception and pro-environmental behaviors of the Chinese public toward air pollution 被引量:2
2
作者 Xiuqin Wu Ge Wu +3 位作者 Jinxiu Ding Ding Li Chin-Hsien Yu Hongxia Xu 《Chinese Journal of Population,Resources and Environment》 2021年第2期171-181,共11页
This study analyzes the misperceptions of the Chinese public about air pollution levels and other potential predictors of participation in pro-environmental behaviors based on the 2013 Chinese General Social Survey(CG... This study analyzes the misperceptions of the Chinese public about air pollution levels and other potential predictors of participation in pro-environmental behaviors based on the 2013 Chinese General Social Survey(CGSS).In this paper,misperception is defined as the difference between subjective perceptions of air pollution and measurements through objective monitoring.We find that pessimistic respondents are more likely to participate in pro-environmental behaviors.The media use and evaluation of the environmental performance of the local government significantly stimulate pro-environmental participation.The results reveal that knowledge and concern about the environment can mitigate the negative effect of optimistic bias on pro-environmental behaviors.In regions where environmental information is widely available,environmental pessimists are especially more likely to participate in such activities.This finding suggests that the government should provide not only accurate information about environmental pollution but also relevant education to enhance the environmental awareness of the public and stimulate pro-environmental participation. 展开更多
关键词 MISPERCEPTION Optimism bias Pessimism bias pro-environmental behaviors Air pollution
在线阅读 下载PDF
The Effects of Job Insecurity, Emotional Exhaustion, and Met Expectations on Hotel Employees’ Pro-Environmental Behaviors: Test of a Serial Mediation Model 被引量:1
3
作者 Osman M.Karatepe Raheleh Hassannia +2 位作者 Tuna Karatepe Constanţa Enea Hamed Rezapouraghdam 《International Journal of Mental Health Promotion》 2023年第2期287-307,共21页
There are a plethora of empirical pieces about employees’pro-environmental behaviors.However,the extant literature has either ignored or not fully examined various factors(e.g.,negative or positive non-green workplac... There are a plethora of empirical pieces about employees’pro-environmental behaviors.However,the extant literature has either ignored or not fully examined various factors(e.g.,negative or positive non-green workplace factors)that might affect employees’pro-environmental behaviors.Realizing these voids,the present paper proposes and tests a serial mediation model that examines the interrelationships of job insecurity,emotional exhaustion,met expectations,and proactive pro-environmental behavior.We used data gathered from hotel customer-contact employees with a time lag of one week and their direct supervisors in China.After presenting support for the psychometric properties of the measures via confirmatory analysis in LISREL 8.30,the abovementioned linkages were gauged using the PROCESS plug-in for statistical package for social sciences.The findings delineated support for the hypothesized associations.Specifically,emotional exhaustion and met expectations partly mediated the effect of job insecurity on proactive pro-environmental behavior.More importantly,emotional exhaustion and met expectations serially mediated the influence of job insecurity on proactive pro-environmental behavior.These findings have important theoretical implications as well as significant implications for diminishing job insecurity,managing emotional exhaustion,increasing met expectations,and enhancing ecofriendly behaviors. 展开更多
关键词 Emotional exhaustion hotel customer-contact employees job insecurity met expectations pro-environmental behavior
在线阅读 下载PDF
The influencing mechanism of pro-environmental behaviors in the private domain on those in the public domain
4
作者 Jianguo Wang Yanyan Kong 《Chinese Journal of Population,Resources and Environment》 2023年第4期212-218,共7页
From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect o... From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect of the status quo maintenance and the moderating effect of the prevention focus orientation.The study re‐sults show that PEBs in the private domain significantly promote individuals’PEBs in the public domain.The status quo maintenance partially mediates the relationship between PEBs in the private and public domains.Specifically,individuals with a high-level prevention focus orientation strengthen the relationship between the PEBs in the private domain and the status quo maintenance,and that of the PEBs in the public domain.There‐fore,individuals with a high-level prevention focus will more likely engage in subsequent PEBs in the public domain after their initial PEBs in the private domain due to their increased status quo maintenance degree.Policymakers and practitioners should pay attention to the prevention-repetition effect and use the PEBs in the private domain to promote those in the public domain. 展开更多
关键词 Regulatory focus theory pro-environmental behaviors PEBs in the private domain PEBs in the public domain Status quo maintenance
在线阅读 下载PDF
Awe-inspiring Environmental Engagement:Unveiling the Impact of Awe on Pro-environmental Behavior in Nature-based Tourism Destinations 被引量:2
5
作者 PENG Hongsong LI Lingling +3 位作者 LI Chang LI Peizhe XIAO Xiao ZHONG Shien 《Journal of Resources and Ecology》 2025年第1期172-183,共12页
Awe,as a positive emotional experience,is recognized for its role in facilitating tourists’pro-environmental behavior(TPEB).However,despite its significance,awe has received minimal attention in tourism-related resea... Awe,as a positive emotional experience,is recognized for its role in facilitating tourists’pro-environmental behavior(TPEB).However,despite its significance,awe has received minimal attention in tourism-related research.This research introduces an expanded model of the theory of planned behavior(TPB)that integrates awe into the rational-oriented TPB framework to examine its impact on TPEB.We collected data at the Mount Huangshan scenic spot in China and employed structural equation modeling for data analysis.Findings suggest that the extended TPB model,which incorporates the emotion of awe,outperforms the original TPB model in predicting TPEB.Awe experienced in nature-based destinations is mainly influenced by the perception of the natural environment(PNE)and significantly predicts TPEB.Study findings offer an integrated framework combining emotional and rational perspectives to understand the factors driving TPEB in nature-based tourism.Furthermore,the study aims to establish connections between the psychological experience of awe and the philosophical perspective of the sublime.Importantly,our findings provide compelling evidence supporting the role of nature-based tourism as an effective model to facilitate tourists’environmental attitudes,emotions,and behaviors.Finally,the implications for practice are discussed. 展开更多
关键词 tourists’pro-environmental behavior AWE stimulus-organism-response framework theory of planned behavior nature-based tourism
原文传递
How Do Situational Factors Impact Tourists’Pro-environmental Behaviors in Homestay?From the Perspective of Host-vip Interaction
6
作者 WANG Jia LI Chenyao +1 位作者 YU Mengting WANG Wenhui 《Journal of Resources and Ecology》 2025年第1期233-244,共12页
Within the domain of homestays,it is imperative to prioritize the augmentation of hosts'pivotal role and the facilitation of pro-environmental behavior among tourists as essential strategies for promoting the sust... Within the domain of homestays,it is imperative to prioritize the augmentation of hosts'pivotal role and the facilitation of pro-environmental behavior among tourists as essential strategies for promoting the sustainability of homestay accommodations.This research utilizes homestays in Pingtan Island as a specific example and employs a survey methodology to collect data.Additionally,a structural equation model is utilized to analyze the causal relationship between situational factors within homestays and the pro-environmental behavior of tourists,specifically within the context of host-vip interaction.The results of the study indicate that there is a favorable correlation between environmental quality and the interaction between hosts and vips,and visitors'pro-environmental behaviors.Furthermore,it is worth noting that situational circumstances play a crucial role in shaping the dynamics of host-vip interaction.This,in turn,serves as a mediator for the influence of situational factors on tourists'pro-environmental behavior.Based on the aforementioned findings,the present study proceeds to examine the pragmatic ramifications of the research and provides recommendations for prospective areas of investigation. 展开更多
关键词 situational factors tourists’pro-environmental behavior homestay host-vip interaction
原文传递
Does the Environmental Fit of Tourists in Agricultural Heritage Sites Promote Pro-environmental Behavior?—Exploring the Mediating Role of Place Attachment
7
作者 DONG Fengli GUO Yanli +1 位作者 CHENG Diexiang GU Xiaoping 《Journal of Resources and Ecology》 2025年第4期1196-1206,共11页
Agricultural heritage tourism resources,represented by ecological vulnerability and cultural sensitivity,require careful stewardship.Tourists’environmentally responsible actions are vital for preserving both the natu... Agricultural heritage tourism resources,represented by ecological vulnerability and cultural sensitivity,require careful stewardship.Tourists’environmentally responsible actions are vital for preserving both the natural and cultural environment of these destinations,ensuring their sustainability.According to“cognition-emotion-behavior theory”and the hierarchy model of tourism experience,this study constructs a conceptual model between tourists’environmental fit,place attachment and pro-environmental behavior.Structural equation modeling and the Bootstrap method are employed for empirical testing.Results indicate that:(1)Function fit has a significant positive effect on tourists’pro-environmental behaviors.(2)Service fit also has a significant positive effect on tourists’pro-environmental behaviors.(3)Place attachment mediates the relationship between environmental fit and pro-environmental behaviors.Therefore,recommendations are offered for managing agricultural heritage tourism destinations to cultivate tourists’sense of functional fit and service fit and to strengthen their place attachment. 展开更多
关键词 agricultural cultural heritage tourist destination environmental fit pro-environmental behavior place attachment
原文传递
From livelihood strategies to green actions:A study on the relationship between farmers'environmental awareness and pro-environmental sustainable behaviors in the Huaibei Plain
8
作者 GUAN Hai-bo HAN Xin-sheng +7 位作者 SONG Ru-tao ZHANG Li-qun MEI Xiang ZHANG Shang-jia HAO Han-bing YANG Zheng YANG Xiao-man LIU Ling-e 《Ecological Economy》 2024年第4期319-332,共14页
In order to explore the impact of changes in rural livelihoods in China on the environmental awareness and behavior of farmers,with the Huaibei Plain as an example,309 farmer households in Lingbi County in Huaibei Pla... In order to explore the impact of changes in rural livelihoods in China on the environmental awareness and behavior of farmers,with the Huaibei Plain as an example,309 farmer households in Lingbi County in Huaibei Plain were surveyed.The variance analysis was used to determine the differences in environmental perceptions and pro-environmental behavior of farmers with different livelihoods.Structural equation models were used to analyze the relationships between livelihood type and environmental perception and behavior.The results show:(1)As the level of non-agricultural activities engaged in by farmers increases,their environmental perceptions shift,evidenced by a rise in both the Environmental Concern Index(ECI)and the Awareness of Pollution Hazards Index(APHI).However,there is a corresponding decrease in their Perception of Changes within the Agroecosystem(PCAE).(2)APHI caused by automobiles,pesticides,and fertilizers varies significantly among groups with different livelihood strategies(p<0.05).(3)Pro-environmental behavior(PEB),particularly in the realms of green consumption and waste management,correlates with the level of non-agriculturalization.Significant variations in these behaviors are observed among farmers with different livelihood strategies(p<0.05).(4)The livelihood strategies have significant direct impact on farmers’environmental perceptions(path coefficient 0.923 p<0.001)and a significant indirect impact on farmers’PEB(path coefficient 0.913 p<0.001).Thus,as farmers shift away from agriculture,their environmental perceptions and behaviors are changing.Diversifying livelihoods reduces dependence on natural resources and increases access to environmental knowledge.This diversification fosters greater awareness of environmental issues and a willingness of farmers to adopt environmentally friendly practices,positively impacting rural environment.Thus,by promoting diversified livelihoods,it is possible to create a powerful strategy for rural environmental governance. 展开更多
关键词 livelihood strategy environmental perception environmental behavior the farmers Huaibei Plain
原文传递
Pro-Environmental Civic Participation in the USA: The Effects of Social Media, Pro-Environmental Lifestyle and Climate Experiences
9
作者 Rita Mano 《American Journal of Climate Change》 2024年第1期31-46,共16页
This study addresses the link between social media use and pro-environmental civic participation considering the moderating effect of social media affordances (public realm) on one hand, and lifestyle behaviors and cl... This study addresses the link between social media use and pro-environmental civic participation considering the moderating effect of social media affordances (public realm) on one hand, and lifestyle behaviors and climate change experiences (personal realm) on the other. We combine communication theory and behavioral models and using a sample of USA individuals (N = 7225) based on the American Trends Panel to predict variations in pro-environmental behavior. We show that social networks rather than information are more effective in predicting pro-environmental behavior. Moreover, a pro-environmental lifestyle as well as climate change experiences at the community level increase the likelihood for pro-environmental participation. However, affordances related to socioeconomic variations generate variations to pro-environmental civic participation. We conclude that in order to capture the depth of pro-environmental civic participation, it is necessary to theoretically and empirically bridge between private and public expressions of pro-environmental awareness. 展开更多
关键词 pro-environmental behavior SOCIO-ECONOMIC Digital Information Digital Networks Private Expressions Public Expressions Climate Changes USA
在线阅读 下载PDF
Psychometric properties of the Chinese-version Behavioral Inhibition System/Behavioral Activation System Scales among stroke survivors with depressive symptoms 被引量:1
10
作者 Dan Shi Yuen Yu Chong +1 位作者 Lijuan Zhou Ho Yu Cheng 《International Journal of Nursing Sciences》 2025年第1期74-80,共7页
Objective:This study aimed to examine the reliability and validity of the Chinese version of the Behavioral Inhibition System/Behavioral Activation System(BIS/BAS)scales among stroke survivors.Methods:The cross-sectio... Objective:This study aimed to examine the reliability and validity of the Chinese version of the Behavioral Inhibition System/Behavioral Activation System(BIS/BAS)scales among stroke survivors.Methods:The cross-sectional study was conducted at four comprehensive hospitals in Taizhou,Jiangsu,China.A sample of 232 first-ever stroke survivors were recruited from June to August 2023.Validity was examined using face validity and construct validity,which used confirmatory factor analysis(CFA)and known-group analysis.Reliability was evaluated by internal consistency and test-retest reliability.Results:The BIS/BAS scales demonstrated satisfactory face validity.The findings of CFAs supported the original four-factor structure of BAS-reward,BAS-drive,BAS-fun seeking,and BIS with acceptable model fit indices.Discriminative validity,assessed via known-group analysis,indicated that stroke survivors with probable depression had significantly lower mean BAS-reward,BAS-drive,and BAS-fun seeking scores(P<0.001)and a higher mean BIS score(P=0.028)compared to those without probable depression.The internal consistency,measured by Cronbach’s a coefficients for the subscales,ranged from 0.669 to 0.964.Test-retest reliability,assessed using intra-class correlation coefficients,ranged from 0.61 to 0.93.Conclusions:The Chinese version of the BIS/BAS scales could be a reliable and valid instrument for measuring behavioral activation among stroke survivors. 展开更多
关键词 behavior DEPRESSION Reliability STROKE Validity
暂未订购
Unveiling the brain’s symphony:exploring the necessity and sufficiency of neural networks in behavior control
11
作者 Fernando Jose Bustos 《Neural Regeneration Research》 SCIE CAS 2025年第1期186-187,共2页
Since the pioneering work by Broca and Wernicke in the 19th century,who examined individuals with brain lesions to associate them with specific behaviors,it was evident that behaviors are complex and cannot be fully a... Since the pioneering work by Broca and Wernicke in the 19th century,who examined individuals with brain lesions to associate them with specific behaviors,it was evident that behaviors are complex and cannot be fully attributable to specific brain areas alone.Instead,they involve connectivity among brain areas,whether close or distant.At that time,this approach was considered the optimal way to dissect brain circuitry and function.These pioneering efforts opened the field to explore the necessity or sufficiency of brain areas in controlling behavior and hence dissecting brain function.However,the connectivity of the brain and the mechanisms through which various brain regions regulate specific behaviors,either individually or collaboratively,remain largely elusive.Utilizing animal models,researchers have endeavored to unravel the necessity or sufficiency of specific brain areas in influencing behavior;however,no clear associations have been firmly established. 展开更多
关键词 behavior CONNECTIVITY NEURAL
暂未订购
The growth behavior and performance of microarc oxidation coating on AZ91/Ti composite: Influence of Ti-reinforcement phase and electrolyte 被引量:1
12
作者 Jinchao Jiao Yongrui Gu +4 位作者 Jin Zhang Yong Lian Xintao Li Kaihong Zheng Fusheng Pan 《Journal of Magnesium and Alloys》 2025年第3期1160-1175,共16页
Magnesium matrix composites with both high strength and ductility have been achieved by introducing pure Ti particles.However,the properties of the surfaces of the composites need to be improved by surface technology,... Magnesium matrix composites with both high strength and ductility have been achieved by introducing pure Ti particles.However,the properties of the surfaces of the composites need to be improved by surface technology,such as micro-arc oxidation(MAO).In this study,we investigated the influence of the Ti-reinforcement phase on coating growth and evolution by subjecting both AZ91 alloy and AZ91/Ti composite to MAO treatment using silicate-based and phosphate-based electrolytes.Results revealed that the Ti-reinforcement phase influenced the MAO process,altering discharge behavior,and leading to a decreased cell voltage.The vigorous discharge of the Ti-reinforcement phase induced the formation of coating discharge channels,concurrently dissolving and oxidizing Ti-reinforcement to produce a composite ceramic coating with TiO2.The MAO coating on the AZ91/Ti composite exhibited a dark blue macromorphology and distinctive local micromorphological anomalies.In silicate electrolyte,a“volcano-like”localized morphology centered on the discharge channel emerged.In contrast,treatment in phosphate-based electrolyte resulted in a coating morphology similar to typical porous ceramic coatings,with visible radial discharge micropores at the reinforcement phase location.Compared to the AZ91 alloy,the coating on the AZ91/Ti composite exhibited lower thickness and higher porosity.MAO treatment reduced the self-corrosion current density of the AZ91/Ti surface by two orders of magnitude.The silicate coating demonstrated better corrosion resistance than the phosphate coating,attributed to its lower porosity.The formation mechanism of MAO coatings on AZ91/Ti composites in phosphate-based and silicate-based electrolytes was proposed. 展开更多
关键词 Magnesium matrix composites Ti-reinforcement Micro-arc oxidation Growth behavior
在线阅读 下载PDF
Features and classification of solid solution behavior of ternary Mg alloys 被引量:1
13
作者 Tao Chen Yuan Yuan +6 位作者 Jun Wang Jiajia Wu Bin Wang Xianhua Chen Nele Moelans Jingfeng Wang Fusheng Pan 《Journal of Magnesium and Alloys》 2025年第6期2522-2539,共18页
The performance of Mg alloys is significantly influenced by the concentrations and solid solution behavior of the alloying elements.In this work,the solid solution behavior of 20 alloying elements in 190 ternary Mg al... The performance of Mg alloys is significantly influenced by the concentrations and solid solution behavior of the alloying elements.In this work,the solid solution behavior of 20 alloying elements in 190 ternary Mg alloy systems at 500℃are systematically investigated.The solid solution behavior of a set of two different alloying elements in Mg alloy systems are suggested to be classified into three categories:inclusivity,exclusivity and proportionality.Inclusivity classification indicates that the two alloying elements are inclusive inα-Mg,increasing the joint solubility of both elements.Exclusivity classification suggests that the two alloying elements have a low joint solid solubility inα-Mg,since they prefer to form stable second phases.For the proportionality classification,the solubility curve of the ternary Mg alloy systems is a straight line connecting the solubility points of the two sub-binary systems.The proposed classification theory was validated by key experiments and the calculation of formation energies.The interaction effects between alloying elements and the preference of formation of second phases are the main factors determining the solid solution behavior classifications.Based on the observed solid solution features of multi-component Mg alloys,principles for alloy design of different types of high-performance Mg alloys were proposed in this work. 展开更多
关键词 Mg alloys Solution behavior Phase diagram Alloy design
在线阅读 下载PDF
Tribological behaviors of AZ91D magnesium alloy under the lubrication of oil suspended synthetic magnesium silicate hydroxide nanotubes 被引量:1
14
作者 Y.L.Yin H.L.Yu +7 位作者 H.M.Wang X.C.Ji Z.Y.Song X.Y.Zhou M.Wei P.J.Shi W.Zhang C.F.Zhao 《Journal of Magnesium and Alloys》 2025年第1期379-397,共19页
Efficient lubrication of magnesium alloys is a highly challenging topic in the field of tribology.In this study,magnesium silicate hydroxide(MSH)nanotubes with serpentine structures were synthesized.The tribological b... Efficient lubrication of magnesium alloys is a highly challenging topic in the field of tribology.In this study,magnesium silicate hydroxide(MSH)nanotubes with serpentine structures were synthesized.The tribological behavior of AZ91D magnesium alloy rubbed against GCr15 steel was studied under lubricating oil with surface-modified MSH nanotubes as additives.The effects of the concentration,applied load,and reciprocating frequency on the friction and wear of the AZ91D alloy were studied using an SRV-4 sliding wear tester.Results show a decrease of 18.7–68.5%in friction coefficient,and a reduction of 19.4–54.3%in wear volume of magnesium alloy can be achieved by applying the synthetic serpentine additive under different conditions.A suspension containing 0.3 wt.%MSH was most efficient in reducing wear and friction.High frequency and medium load were more conducive to improving the tribological properties of magnesium alloys.A series of beneficial physical and chemical processes occurring at the AZ91D alloy/steel interface can be used to explain friction and wear reduction based on the characterization of the morphology,chemical composition,chemical state,microstructure,and nanomechanical properties of the worn surface.The synthetic MSH,with serpentine structure and nanotube morphology,possesses excellent adsorbability,high chemical activity,and good self-lubrication and catalytic activity.Therefore,physical polishing,tribochemical reactions,and physicalchemical depositions can occur easily on the sliding contacts.A dense tribolayer with a complex composition and composite structure was formed on the worn surface.Its high hardness,good toughness and plasticity,and prominent lubricity resulted in the improvement of friction and wear,making the synthetic MSH a promising efficient oil additive for magnesium alloys under boundary and mixed lubrication. 展开更多
关键词 Magnesium alloy Oil lubrication Tribological behavior Magnesium silicate hydroxide SERPENTINE
在线阅读 下载PDF
The Characteristics and Intervention Strategies of Novice Teachers’Inappropriate Behaviors in Classroom Teaching 被引量:1
15
作者 Guoqing Yu 《Journal of Contemporary Educational Research》 2025年第2期46-56,共11页
This study aims to explore the characteristics of novice teachers’inappropriate behaviors in classroom teaching and their intervention strategies.With the continuous improvement of education quality,novice teachers f... This study aims to explore the characteristics of novice teachers’inappropriate behaviors in classroom teaching and their intervention strategies.With the continuous improvement of education quality,novice teachers face increasing challenges in teaching practice.Their inappropriate behaviors not only affect the classroom atmosphere but may also negatively impact students’learning outcomes.Therefore,researching the characteristics of novice teachers’inappropriate behaviors and their intervention strategies holds significant scientific and social value.This study employs a combination of quantitative and qualitative methods to analyze the behavioral patterns of novice teachers in classroom teaching and proposes corresponding intervention strategies.The results indicate that novice teachers’inappropriate behaviors mainly manifest as poor classroom management,monotonous teaching methods,and insufficient interaction with students.Based on these findings,the study proposes a series of effective intervention strategies,including enhancing teacher training,optimizing teaching design,and promoting positive interactions between teachers and students.The conclusions of the study not only provide practical guidance for educational practice but also point out directions for future research,emphasizing the crucial role of teacher professional development in improving teaching quality. 展开更多
关键词 Novice teachers Inappropriate behaviors Intervention strategies Teaching quality Teacher professional development
在线阅读 下载PDF
Effect of initial microstructure on performance and corrosion behavior of GH4169 superalloy joint produced by linear friction welding 被引量:1
16
作者 Xiawei YANG Tingxi MENG +5 位作者 Yu SU Rui XU Zhenguo GUO Yaxin XU Tiejun MA Wenya LI 《Chinese Journal of Aeronautics》 2025年第3期662-675,共14页
The pre-weld heat treatment was carried out to obtain different initial microstructures of the GH4169 superalloy,and then Linear Friction Welding(LFW)was performed.The effect of the pre-weld heat treatment on the micr... The pre-weld heat treatment was carried out to obtain different initial microstructures of the GH4169 superalloy,and then Linear Friction Welding(LFW)was performed.The effect of the pre-weld heat treatment on the microstructure evolution and mechanical properties of the joint was analyzed,and the joint electrochemical corrosion behavior as well as the hot corrosion behavior was studied.The results show that the joint hardness of Base Metal(BM)increases after pre-weld heat treatment,and the strengthening phasesγ′andγ″further precipitate.However,the precipitation phases dissolve significantly in the Weld Zone(WZ)due to the thermal process of LFW.The corrosion resistance in BM is reduced after the pre-weld heat treatment,while it is similar in WZ with a slight decrease.The surface morphology of the BM and WZ can be generally divided into a loose and porous matrix and a scattered oxide particle layer after hot corrosion.The joint cross section exhibits a Cr-depleted zone with the diffusion of Cr to form an oxide film.The corrosion product mainly consists of Fe_(2)O_(3)/Fe_(3)O_(4) as the outer layer and Cr_(2)O_(3) as the inner layer. 展开更多
关键词 Linear friction weldingi GH4169 superalloy Heat treatment Mechanical properties Corrosion behavior
原文传递
Undrained mechanical behavior of unsaturated completely weathered granite:Experimental investigation and constitutive modeling 被引量:1
17
作者 DU Shao-hua MA Jin-yin +2 位作者 RUAN Bo WU Gen-shui ZHANG Rui-chao 《Journal of Central South University》 2025年第6期2307-2327,共21页
The undrained mechanical behavior of unsaturated completely weathered granite(CWG)is highly susceptible to alterations in the hydraulic environment,particularly under uniaxial loading conditions,due to the unique natu... The undrained mechanical behavior of unsaturated completely weathered granite(CWG)is highly susceptible to alterations in the hydraulic environment,particularly under uniaxial loading conditions,due to the unique nature of this soil type.In this study,a series of unconfined compression tests were carried out on unsaturated CWG soil in an underground engineering site,and the effects of varying the environmental variables on the main undrained mechanical properties were analyzed.Based on the experimental results,a novel constitutive model was then established using the damage mechanics theory and the undetermined coefficient method.The results demonstrate that the curves of remolded CWG specimens with different moisture contents and dry densities exhibited diverse characteristics,including brittleness,significant softening,and ductility.As a typical indicator,the unconfined compression strength of soil specimens initially increased with an increase in moisture content and then decreased.Meanwhile,an optimal moisture content of approximately 10.5%could be observed,while a critical moisture content value of 13.0%was identified,beyond which the strength of the specimen decreases sharply.Moreover,the deformation and fracture of CWG specimens were predominantly caused by shear failure,and the ultimate failure modes were primarily influenced by moisture content rather than dry density.Furthermore,by comparing several similar models and the experimental data,the proposed model could accurately replicate the undrained mechanical characteristics of unsaturated CWG soil,and quantitatively describe the key mechanical indexes.These findings offer a valuable reference point for understanding the underlying mechanisms,anticipating potential risks,and implementing effective control measures in similar underground engineering projects. 展开更多
关键词 completely weathered granite undrained mechanical behavior environmental variable unconfined compression test constitutive model
在线阅读 下载PDF
Impact behavior and strain rate effects of artificial limestone by MICP 被引量:1
18
作者 Yaru Lv Lin Wu +2 位作者 Zhigang Duan Yuchen Su Dongdong Zhang 《Biogeotechnics》 2025年第2期72-80,共9页
Natural cemented calcareous sand and limestone are highly complex and not well understood in terms of the me-chanical behavior due to the difficulty of obtaining undisturbed samples from far sea.This paper proposes an... Natural cemented calcareous sand and limestone are highly complex and not well understood in terms of the me-chanical behavior due to the difficulty of obtaining undisturbed samples from far sea.This paper proposes an artificial method in a laboratory setting using microbial-induced carbonate precipitation(MICP)to simulate the natural process of cementation of limestone.The artificially cemented sand has a high degree of similarity with the natural weakly limestone in three aspects:(1)the mineral composition of the cemented material is also granular calcite and acicular aragonite;(2)the microstructure in interconnected open pore network can be gradually closed and contracted with cementation.The porosity reaches to approximately 9.2%;(3)both the stress-strain relationship and the unconfined strength closely resemble that of natural weakly limestone.Furthermore,both static and dynamic behaviors of artificial limestone were studied by quasi-static compression tests and Split Hopkinson Pressure Bar(SHPB)tests,finding that the unconfined strength of weakly artifical limestone exponentially increases with increasing strain rate.A rate-dependent bond strength was proposed and implemented in software to reveal the mechanism of strain rate effects.It is found that the loading velocity is too high to keep in sync with the initiation and propagation of cracks under impact loading.This delay-induced viscosity may restrict the movement of the surrounding balls,thus increasing resistance. 展开更多
关键词 Weakly limestone MICP artificial cementation Calcareous sand Limestone impact behavior Strain rate effects
暂未订购
Effect of Nb-V microalloying on the hot deformation behavior of medium Mn steels
19
作者 Yumeng Wang Qinyi Guo +1 位作者 Bin Hu Haiwen Luo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2025年第2期360-368,共9页
The influence of Nb-V microalloying on the hot deformation behavior and microstructures of medium Mn steel(MMS)was investigated by uniaxial hot compression tests.By establishing the constitutive equations for simulati... The influence of Nb-V microalloying on the hot deformation behavior and microstructures of medium Mn steel(MMS)was investigated by uniaxial hot compression tests.By establishing the constitutive equations for simulating the measured flow curves,we successfully constructed deformation activation energy(Q)maps and processing maps for identifying the region of flow instability.We concluded the following consequences of Nb-V alloying for MMS.(i)The critical strain increases and the increment diminishes with the increasing deformation temperature,suggesting that NbC precipitates more efficiently retard dynamic recrystallization(DRX)in MMS compared with solute Nb.(ii)The deformation activation energy of MMS is significantly increased and even higher than that of some reported high Mn steels,suggesting that its ability to retard DRX is greater than that of the high Mn content.(iii)The hot workability of MMS is improved by narrowing the hot processing window for the unstable flow stress,in which fine recrystallized and coarse unrecrystallized grains are present. 展开更多
关键词 medium manganese steel niobium-vanadium microalloying flow behavior dynamic recrystallization hot workability
在线阅读 下载PDF
Commentary on“Accelerometer-measured physical activity,sedentary behavior,and incidence of macrovascular and microvascular events in individuals with type 2 diabetes mellitus and prediabetes” 被引量:1
20
作者 Barbara E.Ainsworth Haili Tian 《Journal of Sport and Health Science》 2025年第1期3-5,共3页
Type 2 diabetes(T2D)is an insidious disease associated with neural and vascular complications,acceleration of cardiovascular disease,changes in heart function,and premature death.In the newly released article of the J... Type 2 diabetes(T2D)is an insidious disease associated with neural and vascular complications,acceleration of cardiovascular disease,changes in heart function,and premature death.In the newly released article of the Journal of Sport and Health Science,Liang et al.1 describe results from the UK Biobank data showing the benefits of moderate-to-vigorous intensity physical activity(MVPA)on reducing the risks for vascular events in 11,474 adults with T2D and prediabetes. 展开更多
关键词 PREDIABETES type diabetes t d sedentary behavior vascular events macrovascular events type diabetes mellitus microvascular events
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部