For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the ...For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the matrix. With the conception of the local solidification time, a kinematics mechanism of particle pushing into the crystal boundary during the solidification process was assumed. Through the analysis of forces acted on the particle in front of the solid/liquid interface the critical velocity criterion for the particles pushing was given. The calculation results show when the growth rate of the interface V is less than or equals to the critical velocity V C , the particles on the solid/liquid interface is pushed into the boundary region of cellular crystals, where they are distributed as a chain like straight, which forms a particle strengthened in situ composite materials.展开更多
In recent years,applied linguistics has made great progress and reached a general consensus about its functions and applications,but still many hot topics and cutting-edge issues remain controversial and worthy of fur...In recent years,applied linguistics has made great progress and reached a general consensus about its functions and applications,but still many hot topics and cutting-edge issues remain controversial and worthy of further exploration and detailed discussion.In order to help push forward the field of applied linguistics,an International Forum on Frontier Issues in Applied Linguistics (IFFIAL) is going to be held in Hangzhou,which is sponsored by Beijing Foreign Studies University (BFSU) and organized by Foreign Language Teaching and Research Press(FLTRP).Ten editorial departments of BFSU’s academic journals will co-organize the forum.展开更多
The particle migrating behavior at solidifying front is discussed in theory with the application of electromagnetic force field(EMFF), on the basis of foregone analysis of force upon particle ahead of solidifying fron...The particle migrating behavior at solidifying front is discussed in theory with the application of electromagnetic force field(EMFF), on the basis of foregone analysis of force upon particle ahead of solidifying front without electromagnetic force field. The critical solidification velocities of particle pushing/engulfment transition ahead of horizontal and vertical interface are derived respectively when a certain EMFF is applied. And the critical electromagnetic forces of particle pushing/engulfment transition ahead of horizontal and vertical interface are also derived separately when a certain solidifying velocity is given.展开更多
By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies...By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies that the Chinese Government adopted to stimulate domestic demand. Domestic demand can be divided into investment demand and consumption demand,展开更多
Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the stead...Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the steady loss of their natural habitats,both black and white rhinos have been pushed perilously close to extinction.展开更多
1 Fold two pieces of paper in half from top to bottom.2 Take one piece of paper.In the center of the folded side,cut two 3-cm lines.v^Cut them 5 cm apart.3 Open the card and push the tab in from the back.
[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese m...[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese medicine.[Methods]A multicenter randomized controlled trial was conducted involving 100 children,with the treatment group consisting of 50 participants receiving a combined treatment,while the control group,also comprising 50 participants,received conventional tuina.In the treatment group,the Yizhichan Pushing Manipulation was applied at a frequency of 120 times/min and a strength of 0.5-1.0 kg,targeting acupoints such as Ganyu and Guangming.The alterations in naked eye visual acuity,diopter measurements,and ciliary muscle regulation function were compared between the two groups of children both prior to and following treatment,and the clinical efficacy was assessed.[Results]The treatment group demonstrated a statistically significant enhancement in visual acuity(1.74±0.49 lines vs.1.02±0.52 lines),diopter improvement(0.91±0.29 D vs.0.46±0.25 D),and overall efficiency(96%vs.78%)when compared to the control group(all P<0.01).[Conclusions]This combined treatment exerts a therapeutic effect through a dual mechanism that involves the regulation of liver meridian qi and blood,as well as the enhancement of ciliary muscle function.This approach merits further dissemination and application in the prevention and management of myopia in children.展开更多
Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-in...Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-induced anxiety but also complex challenges such as interpersonal adaptation difficulties and career planning confusion.Traditional“problem-oriented”intervention models have shown limitations in responsiveness and adaptability,often only passively addressing existing psychological crises rather than preventing them in advance.This study aims to explore an AI-powered“positive psychology”proactive intervention model through developing an intelligent system.The system automatically collects,filters,and personalizes recommendations for positive activities on campus.Using a randomized controlled trial design,we conducted an 8-week intervention study involving 126 college students at a university.The study found that AI-based“campus positive activity”recommendations effectively boost students’positive emotions and promote psychological capital development through cumulative micro-interventions.This provides universities with empirical evidence and innovative methods to implement low-cost,efficient,and scalable mental health promotion programs through smart technology.展开更多
This study focuses on the talent supply-demand contradiction in grassroots employment under the Rural Revitalization Strategy.It systematically analyzes the internal and external driving mechanisms behind rural colleg...This study focuses on the talent supply-demand contradiction in grassroots employment under the Rural Revitalization Strategy.It systematically analyzes the internal and external driving mechanisms behind rural college students decisions to pursue careers at the grassroots level,exploring the"push-pull"factors and the guiding role of university counselors.Employing a mixed-methods approach combining literature review and in-depth interviews,the analysis reveals that urban employment competition pressure,high cost of living coupled with economic burdens,and household registration and social resource barriers constitute the primary"push"factors.Conversely,national policy support,emotional attachment to one s hometown and the need for value realization,as well as grassroots development opportunities and growth potential,serve as the main"pull"factors.University counselors play a significant guiding role in the employment decision-making process of rural college students.Through ideological guidance,information dissemination,capacity building,and psychological support,they enhance students job-seeking capabilities and adaptability to grassroots work,thereby strengthening their identification with such career paths.This paper provides practical insights for counselors facilitating the return of rural college students to grassroots employment.展开更多
Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast cond...Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast condition.High lateral tie resistance is necessary for preventing lateral misalignments and track buckles.Therefore,understanding how various factors affect the lateral tie resistance will aid in the development of track buckling risk assessments and ballast maintenance best practices.Design/methodology/approach–The test involved tamping a section of track that consisted of both concrete and wood ties and then increasing the lateral tie resistance,using either tonnage during speed restrictions or a DTS.The STPTs and top-of-rail(TOR)elevation measurements were taken at multiple stages,including immediately after tamping and then after different tonnage increments or DTS.The results from this test were then added to a compiled measurement from previous tests,and the results from all the tests were used to develop general guidelines for ballast maintenance best practices and trade-off considerations.Findings–The results showed multiple factors affect the lateral track strength and therefore the susceptibility to misalignments and track buckles.The disturbance from ballast tamping can reduce the lateral track strength by 20–80%(∼45%median)and can be compacted from either tonnage(25–50%regain in strength after 0.1 m gross ton or MGT)or DTS(33–78%regain in strength).The amount of ballast(shoulder width and crib height),tie type and ballast characteristics all have a meaningful role in lateral track strength.Originality/value–This paper is based on the testing programs conducted by authors at MxV Rail.展开更多
Under the paradigm of Industry 5.0,intelligent manufacturing transcends mere efficiency enhancement by emphasizing human-machine collaboration,where human expertise plays a central role in assembly processes.Despite a...Under the paradigm of Industry 5.0,intelligent manufacturing transcends mere efficiency enhancement by emphasizing human-machine collaboration,where human expertise plays a central role in assembly processes.Despite advancements in intelligent and digital technologies,assembly process design still heavily relies on manual knowledge reuse,and inefficiencies and inconsistent quality in process documentation are caused.To address the aforementioned issues,this paper proposes a knowledge push method of complex product assembly process design based on distillation model-based dynamically enhanced graph and Bayesian network.First,an initial knowledge graph is constructed using a BERT-BiLSTM-CRF model trained with integrated human expertise and a fine-tuned large language model.Then,a confidence-based dynamic weighted fusion strategy is employed to achieve dynamic incremental construction of the knowledge graph with low resource consumption.Subsequently,a Bayesian network model is constructed based on the relationships between assembly components,assembly features,and operations.Bayesian network reasoning is used to push assembly process knowledge under different design requirements.Finally,the feasibility of the Bayesian network construction method and the effectiveness of Bayesian network reasoning are verified through a specific example,significantly improving the utilization of assembly process knowledge and the efficiency of assembly process design.展开更多
Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being o...Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being of rural residents–the“three rural work,”as emphasized by Premier Li Qiang in the 2025 government work report.展开更多
基金ProjectsupportedbytheNationalNaturalScienceFoundationof China (5 0 0 75 0 5 1)
文摘For in situ composite materials, the interaction between the second phase particles and the solidification interface attracts more attentions of people, for concerning the final distribution of the particles on the matrix. With the conception of the local solidification time, a kinematics mechanism of particle pushing into the crystal boundary during the solidification process was assumed. Through the analysis of forces acted on the particle in front of the solid/liquid interface the critical velocity criterion for the particles pushing was given. The calculation results show when the growth rate of the interface V is less than or equals to the critical velocity V C , the particles on the solid/liquid interface is pushed into the boundary region of cellular crystals, where they are distributed as a chain like straight, which forms a particle strengthened in situ composite materials.
文摘In recent years,applied linguistics has made great progress and reached a general consensus about its functions and applications,but still many hot topics and cutting-edge issues remain controversial and worthy of further exploration and detailed discussion.In order to help push forward the field of applied linguistics,an International Forum on Frontier Issues in Applied Linguistics (IFFIAL) is going to be held in Hangzhou,which is sponsored by Beijing Foreign Studies University (BFSU) and organized by Foreign Language Teaching and Research Press(FLTRP).Ten editorial departments of BFSU’s academic journals will co-organize the forum.
基金Supported by the Science Foundation of Shanghai Municipal Commission of Scienceand Technology!( 97JC1 41 0 7)
文摘The particle migrating behavior at solidifying front is discussed in theory with the application of electromagnetic force field(EMFF), on the basis of foregone analysis of force upon particle ahead of solidifying front without electromagnetic force field. The critical solidification velocities of particle pushing/engulfment transition ahead of horizontal and vertical interface are derived respectively when a certain EMFF is applied. And the critical electromagnetic forces of particle pushing/engulfment transition ahead of horizontal and vertical interface are also derived separately when a certain solidifying velocity is given.
文摘By contrast to a slowdown in the world economy, China kept up a rapid growth rate, a relatively high quality of growth and low inflation for the year 2001. This is mainly due to the result of proactive fiscal policies that the Chinese Government adopted to stimulate domestic demand. Domestic demand can be divided into investment demand and consumption demand,
文摘Africa’s Threatened Rhinos.Decimated by relentless poaching for their highly coveted horns,subjected to large-scale slaughter by“sports”hunters throughout the 19th and early 20th centuries,and squeezed by the steady loss of their natural habitats,both black and white rhinos have been pushed perilously close to extinction.
文摘1 Fold two pieces of paper in half from top to bottom.2 Take one piece of paper.In the center of the folded side,cut two 3-cm lines.v^Cut them 5 cm apart.3 Open the card and push the tab in from the back.
基金Supported by Hospital-level Project of Shiyan Taihe Hospital(2018JJXM093).
文摘[Objectives]To investigate the therapeutic effects of combined treatment on children diagnosed with pseudomyopia,based on the theoretical framework that the liver is associated with eye health in traditional Chinese medicine.[Methods]A multicenter randomized controlled trial was conducted involving 100 children,with the treatment group consisting of 50 participants receiving a combined treatment,while the control group,also comprising 50 participants,received conventional tuina.In the treatment group,the Yizhichan Pushing Manipulation was applied at a frequency of 120 times/min and a strength of 0.5-1.0 kg,targeting acupoints such as Ganyu and Guangming.The alterations in naked eye visual acuity,diopter measurements,and ciliary muscle regulation function were compared between the two groups of children both prior to and following treatment,and the clinical efficacy was assessed.[Results]The treatment group demonstrated a statistically significant enhancement in visual acuity(1.74±0.49 lines vs.1.02±0.52 lines),diopter improvement(0.91±0.29 D vs.0.46±0.25 D),and overall efficiency(96%vs.78%)when compared to the control group(all P<0.01).[Conclusions]This combined treatment exerts a therapeutic effect through a dual mechanism that involves the regulation of liver meridian qi and blood,as well as the enhancement of ciliary muscle function.This approach merits further dissemination and application in the prevention and management of myopia in children.
文摘Higher education is transitioning from mass expansion to high-quality development.In this process,mental health issues among college students have become increasingly prominent,encompassing not only academic stress-induced anxiety but also complex challenges such as interpersonal adaptation difficulties and career planning confusion.Traditional“problem-oriented”intervention models have shown limitations in responsiveness and adaptability,often only passively addressing existing psychological crises rather than preventing them in advance.This study aims to explore an AI-powered“positive psychology”proactive intervention model through developing an intelligent system.The system automatically collects,filters,and personalizes recommendations for positive activities on campus.Using a randomized controlled trial design,we conducted an 8-week intervention study involving 126 college students at a university.The study found that AI-based“campus positive activity”recommendations effectively boost students’positive emotions and promote psychological capital development through cumulative micro-interventions.This provides universities with empirical evidence and innovative methods to implement low-cost,efficient,and scalable mental health promotion programs through smart technology.
基金Supported by Jiangxi University Humanities and Social Sciences Research Project(GL23110).
文摘This study focuses on the talent supply-demand contradiction in grassroots employment under the Rural Revitalization Strategy.It systematically analyzes the internal and external driving mechanisms behind rural college students decisions to pursue careers at the grassroots level,exploring the"push-pull"factors and the guiding role of university counselors.Employing a mixed-methods approach combining literature review and in-depth interviews,the analysis reveals that urban employment competition pressure,high cost of living coupled with economic burdens,and household registration and social resource barriers constitute the primary"push"factors.Conversely,national policy support,emotional attachment to one s hometown and the need for value realization,as well as grassroots development opportunities and growth potential,serve as the main"pull"factors.University counselors play a significant guiding role in the employment decision-making process of rural college students.Through ideological guidance,information dissemination,capacity building,and psychological support,they enhance students job-seeking capabilities and adaptability to grassroots work,thereby strengthening their identification with such career paths.This paper provides practical insights for counselors facilitating the return of rural college students to grassroots employment.
文摘Purpose–MxV Rail conducted multiple single tie push tests(STPTs)between 2020 and 2023 to assess the changes in lateral tie resistance from tonnage accumulation,dynamic track stabilizers(DTS),tie type and ballast condition.High lateral tie resistance is necessary for preventing lateral misalignments and track buckles.Therefore,understanding how various factors affect the lateral tie resistance will aid in the development of track buckling risk assessments and ballast maintenance best practices.Design/methodology/approach–The test involved tamping a section of track that consisted of both concrete and wood ties and then increasing the lateral tie resistance,using either tonnage during speed restrictions or a DTS.The STPTs and top-of-rail(TOR)elevation measurements were taken at multiple stages,including immediately after tamping and then after different tonnage increments or DTS.The results from this test were then added to a compiled measurement from previous tests,and the results from all the tests were used to develop general guidelines for ballast maintenance best practices and trade-off considerations.Findings–The results showed multiple factors affect the lateral track strength and therefore the susceptibility to misalignments and track buckles.The disturbance from ballast tamping can reduce the lateral track strength by 20–80%(∼45%median)and can be compacted from either tonnage(25–50%regain in strength after 0.1 m gross ton or MGT)or DTS(33–78%regain in strength).The amount of ballast(shoulder width and crib height),tie type and ballast characteristics all have a meaningful role in lateral track strength.Originality/value–This paper is based on the testing programs conducted by authors at MxV Rail.
基金Supported by National Key Research and Development Program(Grant No.2024YFB3312700)National Natural Science Foundation of China(Grant No.52405541)the Changzhou Municipal Sci&Tech Program(Grant No.CJ20241131)。
文摘Under the paradigm of Industry 5.0,intelligent manufacturing transcends mere efficiency enhancement by emphasizing human-machine collaboration,where human expertise plays a central role in assembly processes.Despite advancements in intelligent and digital technologies,assembly process design still heavily relies on manual knowledge reuse,and inefficiencies and inconsistent quality in process documentation are caused.To address the aforementioned issues,this paper proposes a knowledge push method of complex product assembly process design based on distillation model-based dynamically enhanced graph and Bayesian network.First,an initial knowledge graph is constructed using a BERT-BiLSTM-CRF model trained with integrated human expertise and a fine-tuned large language model.Then,a confidence-based dynamic weighted fusion strategy is employed to achieve dynamic incremental construction of the knowledge graph with low resource consumption.Subsequently,a Bayesian network model is constructed based on the relationships between assembly components,assembly features,and operations.Bayesian network reasoning is used to push assembly process knowledge under different design requirements.Finally,the feasibility of the Bayesian network construction method and the effectiveness of Bayesian network reasoning are verified through a specific example,significantly improving the utilization of assembly process knowledge and the efficiency of assembly process design.
文摘Rural revitalization was a major focus during this year’s“two sessions.”THE drive to advance China’s all-around rural revitalization comprises advances in agriculture,revitalization of rural areas,and well-being of rural residents–the“three rural work,”as emphasized by Premier Li Qiang in the 2025 government work report.
