Process-oriented writing is the main way for teachers to precisely control the problems and weak links presented by students in each writing stage.Therefore,it is possible to design teaching activities that are in lin...Process-oriented writing is the main way for teachers to precisely control the problems and weak links presented by students in each writing stage.Therefore,it is possible to design teaching activities that are in line with their cognitive levels based on students’needs;promote writing through debate,attach importance to the high integration of reading,speaking,and writing;and strengthen the subjectivity of students in writing by taking interest as the lead and life as the source.展开更多
Research in L2 writing assessment has overwhelmingly focused on helping students enhance their writing quality and global development in language proficiency by various means and approaches of assessment.However,studi...Research in L2 writing assessment has overwhelmingly focused on helping students enhance their writing quality and global development in language proficiency by various means and approaches of assessment.However,studies of the learning on the part of EFL writing teachers,especially when engaging in collaborative assessment with students,are few and far between.This qualitative case study therefore fills this void of foregoing research by examining the learning and development of a Chinese EFL writing teacher who employed teacher-student collaborative assessment(TSCA)(Wen,2016)in an L2 academic writing course.Drawing upon multiple types of data,three themes emerged with regard to the learning of the L2 writing teacher:1)becoming more assessment literate and capable of providing constructive feedback;2)gaining more efficacy in instructional tactics,student engagement and classroom management;and 3)developing a better understanding of students’evaluation focus as well as their needs and expertise in writing.This study offers a robust picture of how TSCA can foster multidimensional teacher learning-cognitively,affectively,and relationally-affirming its value not only as an assessment tool but as a transformative pedagogical practice.展开更多
Giant panda writing is a classic form of thematic nature writing.Since the scientific discovery and the popularization of the giant panda by naturalists,this writing tradition has spanned nearly a century.Throughout t...Giant panda writing is a classic form of thematic nature writing.Since the scientific discovery and the popularization of the giant panda by naturalists,this writing tradition has spanned nearly a century.Throughout this process,Chinese giant panda writing has developed its own distinct characteristics.Western giant panda writing encompasses genres such as scientific essays,fieldwork notes,and documentary works.Within Chinese giant panda writing,reportage,popular science works,and comprehensive,systematic documentary works all have representative authors and texts.In recent years,IP-oriented giant panda books have shown notable performance.While Chinese giant panda writing exhibits diverse types and perspectives,its scientific rigor,informative value,and innovative expression still require enhancement.As a form of thematic nature writing,giant panda writing provides valuable insights for writings on other subjects.展开更多
The rapid development of artificial intelligence(AI)has brought significant changes to academic writing,raising important questions about authorship,originality,and how writing is taught and learned.While AI-based wri...The rapid development of artificial intelligence(AI)has brought significant changes to academic writing,raising important questions about authorship,originality,and how writing is taught and learned.While AI-based writing tools are now widely available,academic writing instruction has not kept pace and continues to rely on conventional pedagogical approaches.This paper introduces a conceptual framework called the Academic Writing and AI Integration(AWAI)Framework,which seeks to address this gap in a structured and pedagogically informed manner.Grounded in interdisciplinary scholarship,the AWAI Framework emphasizes the integration of three key elements:scholarly content knowledge,academic writing conventions,and AI literacy.Rather than reporting empirical findings,this study presents a theoretical model aimed at supporting educators and students as they navigate the opportunities and challenges posed by AI in academic contexts.The framework outlines a balanced approach to incorporating AI tools into writing instruction,while upholding the standards of academic rigor and ethical responsibility.Through this work,academic writing is reconsidered in light of emerging technological influences.The framework contributes to broader discussions about educational innovation and provides a foundation for future inquiry into the evolving relationship between human authors and intelligent systems in scholarly communication.展开更多
In this study,it aims at examining the differences between humangenerated and AI-generated texts in IELTS Writing Task 2.It especially focuses on lexical resourcefulness,grammatical accuracy,and contextual appropriate...In this study,it aims at examining the differences between humangenerated and AI-generated texts in IELTS Writing Task 2.It especially focuses on lexical resourcefulness,grammatical accuracy,and contextual appropriateness.We analyzed 20 essays,including 10 human written ones by Chinese university students who have achieved an IELTS writing score ranging from 5.5 to 6.0,and 10 ChatGPT-4 Turbo-generated ones,using a mixed-methods approach,through corpus-based tools(NLTK,SpaCy,AntConc)and qualitative content analysis.Results showed that AI texts exhibited superior grammatical accuracy(0.4%–3%error rates for AI vs.20–26%for university students)but higher lexical repetition(17.2%to 23.25%for AI vs.17.68%for university students)and weaker contextual adaptability(3.33/10–3.69/10 for AI vs.3.23/10 to 4.14/10 for university students).While AI’s grammatical precision supports its utility as a corrective tool,human writers outperformed AI in lexical diversity and task-specific nuance.The findings advocate for a hybrid pedagogical model that leverages AI’s strengths in error detection while retaining human instruction for advanced lexical and contextual skills.Limitations include the small corpus and single-AI-model focus,suggesting future research with diverse datasets and longitudinal designs.展开更多
The digital transformation of international Chinese language education is an important direction for enhancing the global dissemination effectiveness of the Chinese language.In teaching Chinese as a second language,wr...The digital transformation of international Chinese language education is an important direction for enhancing the global dissemination effectiveness of the Chinese language.In teaching Chinese as a second language,writing,as a form of higher-order language output,has long faced challenges such as insufficient teacher resources,lagging feedback,and a lack of personalized support.Generative artificial intelligence(GAI)offers a new path for teaching Chinese writing.This study,with intermediate Chinese learners as the subjects,systematically explores the effectiveness of GAI-assisted Chinese writing instruction through a combination of controlled experiments and interviews based on a Chinese learning platform embedded with GAI.The study found that the GAI class was significantly superior to the traditional class in terms of the adequacy dimension of content quality and the grammatical and lexical dimensions of language quality;teachers and GAI play complementary roles in this process;most Chinese learners have a positive attitude towards this model.Based on the above findings,this study presents three suggestions:using GAI to empower Chinese writing instruction,giving full play to the complementary advantages of human and machine,and enhancing the AI literacy of teachers and students to achieve two-way empowerment of human and machine,with the aim of promoting the intelligent development of international Chinese education.展开更多
二语写作是二语习得研究领域的重要组成部分。运用CiteSpace软件对近十年发表在Journal of Second Language Writing的231篇实证研究论文进行可视化分析,研究发现:二语写作研究整体呈波动性上升趋势,研究规模较为稳定,研究关注度逐渐提...二语写作是二语习得研究领域的重要组成部分。运用CiteSpace软件对近十年发表在Journal of Second Language Writing的231篇实证研究论文进行可视化分析,研究发现:二语写作研究整体呈波动性上升趋势,研究规模较为稳定,研究关注度逐渐提升;二语写作研究领域暂未形成明显的核心作者和机构的合作网络;研究主题主要聚焦二语写作教学方法的多元化、二语写作反馈的多焦点、二语写作评估与测试的科学化,以及学习者个体差异的多维影响等方面。基于此,提出未来该领域发展需加强学者、机构之间的相互合作;关注个体学习者写作过程的认知特征与情感因素,尤其重视青少年二语学习过程的研究;扩大二语写作纵向研究规模,推动研究的深入发展。展开更多
This study contests the prevalent perception of graffiti writing,especially tagging and bombing,as meaningless vandalism.It contends that graffiti is a form of expression with intrinsic political implications.Leveragi...This study contests the prevalent perception of graffiti writing,especially tagging and bombing,as meaningless vandalism.It contends that graffiti is a form of expression with intrinsic political implications.Leveraging the notion of spatial justice and Jacques Ranciere's philosophy,I demonstrate how graffiti reclaims urban visibility against the commercial monopoly of visibility in public spaces and challenges the inequitable allocation of opportunities for self-expression in modern cities.Despite writers'common denial of political motives,their actions may be interpreted as manifestations of resistance within wider sociospatial conflicts.This study situates grffti within discussions of political art,spatial commodification,and everyday resistance,proposing a normative framework for viewing the art of the urban signature as an activity that redefines"the community that speaks."展开更多
This paper reveals and categorizes the most typical writing problems found amongst the Chinese university students.It also analyzes the underlying causes.The findings could have implications for all Chinese English le...This paper reveals and categorizes the most typical writing problems found amongst the Chinese university students.It also analyzes the underlying causes.The findings could have implications for all Chinese English learners.In the end,the author presents suggestions for the improvement of the English writing teaching in China.展开更多
To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composite...To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composites.The rheological properties of the composite inks were systematically analyzed to assess the effects of phenolic resin(PR)and carbon fiber(CF)content.Results show pronounced shear-thinning behavior and strong thixotropy-both essential for stable DIW.Additionally,UV/heat curing behavior was characterized to provide theoretical insights for optimizing curing parameters.Notably,CF addition is found to significantly attenuate UV light penetration compared to pure PR.As CF content increases,the critical UV irradiation energy rises sharply from 68.47 to 911.19 mJ/cm^(2),necessitating precise adjustments to curing parameters.Preforms were pyrolyzed in a carbon tube furnace to examine pore-formation characteristics,and chemical vapor infiltration(CVI)was applied to filling the resulting pores,yielding C/C composites with a flexural strength of 115.19 MPa.展开更多
Compared to subtractive manufacturing and casting,3D printing(additive manufacturing)offers advantages,such as the rapid production of complex structures,reduced material waste,and environmental friendliness.Direct in...Compared to subtractive manufacturing and casting,3D printing(additive manufacturing)offers advantages,such as the rapid production of complex structures,reduced material waste,and environmental friendliness.Direct ink writing(DIW)is one of the most popular 3D printing techniques owing to its ability to print multiple materials simultaneously and its high compatibility with printing inks.However,DIW presents significant challenges,particularly in the printing of high-performance polymers.The main challenges are as follows:1.The rigid structures and reaction kinetics of high-performance polymers make developing new inks difficult.2.The limited types of available high-performance polymers underscore the need for new DIW-suitable materials.3.Layer-by-layer stacking weakens interlayer bonding,affecting the mechanical properties of the printed product.4.The accuracy and speed of DIW printing are insufficient for large-scale manufacturing.After introducing the topic,the requirements for DIW printing inks are first reviewed,emphasizing the importance of thixotropic agents.Then,research progress regarding DIW printing of high-performance polymers is comprehensively reviewed according to the requirements of different polymer inks.Additionally,the applications of these materials across various fields are summarized.Finally,the challenges in DIW printing of high-performance polymers,along with corresponding solutions and future development prospects,are discussed in detail.展开更多
This paper examines the disease writing in Jesmyn Ward’s Sing,Unburied,Sing,focusing on its metaphorical implications at three levels.Through an analysis of three central diseases-Mam’s cancer,Leonie’s drug addicti...This paper examines the disease writing in Jesmyn Ward’s Sing,Unburied,Sing,focusing on its metaphorical implications at three levels.Through an analysis of three central diseases-Mam’s cancer,Leonie’s drug addiction,and Kayla’s fever and vomiting,this study reveals how Ward employs illness as a lens to critique systemic racism,social injustice,and intergenerational trauma in the American South.Mam’s cancer symbolizes emotional repression and historical wounds inflicted upon Black Americans,while Leonie’s addiction reflects both personal escapism and the destructive consequences of racial and social marginalization.Kayla’s symptoms,along with other people’s symtom of vomiting,serve as visceral expressions of psychological rejection and resistance to oppression.Drawing on Sontag’s theories of illness as metaphor,the paper argues that Ward’s disease narratives transcend individual suffering,exposing the pervasive“diseases”of racism and inequality in society.The novel’s portrayal of illness underscores the resilience of Black communities and the urgent need for collective healing from cultural trauma.展开更多
The fabrication of nanostructures beyond the diffraction limit has been the focus of nanotechnology research.Scanning probe microscopy(SPM)has attracted the attention of researchers for the detection and manufacture o...The fabrication of nanostructures beyond the diffraction limit has been the focus of nanotechnology research.Scanning probe microscopy(SPM)has attracted the attention of researchers for the detection and manufacture of nanostructures.Here,a nanosecond laser irradiated a cantilevered scanning nearfield optical microscopy(SNOM)tip and directly wrote subwavelength nanostructures on Au nano-film,without the assistance of a mask or vacuum atmosphere.This method was stable and reproducible for long-term use.The in situ morphology detection was conducted after the writing process by atomic force microscope(AFM).A feature linewidth of approximately 83.6 nm(<k/6)was confirmed using scanning electron microscopy(SEM).Linewidth of(167.8±6.6)nm was reproduced stably.Theoretical calculations revealed that the elliptical heat distribution under the SNOM tip generated different linewidths when the tip scanned vertically and horizontally.It also interpreted the influential mechanism of single-pulse energy.The simulated linewidths were consistent with the fabricated linewidths.According to the elemental analysis by energy dispersive spectrometer(EDS),the mechanism of this method can be interpreted asmelting of the Au nano-film instead of oxidation.Owing to its high positioning,machining accuracy,and instantaneous energy,this technology is considered convenient and economical for nanostructure fabrication and is proposed to be applied in nanolithography on multiple materials in the future.展开更多
Flexible electronic technology has laid the foundation for complex human-computer interaction system,and has attracted great attention in the field of human motion detection and soft robotics.Graphene has received an ...Flexible electronic technology has laid the foundation for complex human-computer interaction system,and has attracted great attention in the field of human motion detection and soft robotics.Graphene has received an extensive attention due to its excellent electrical conductivity;however,how to use it to fabricate wearable flexible sensors with complex structures remains challenging.In this study,we studied the rheological behavior of graphene/polydimethylsiloxane ink and proposed an optimal graphene ratio,which makes the ink have an good printability and conductivity at the same time.Then,based on the theory of Peano fractal layout,we proposed a two-dimensional structure that can withstand multi-directional tension by replacing the traditional arris structure with the arc structure.After that,we manufactured circular arc fractal structure sensor by adjusting ink composition and printing structure through direct ink writing method.Finally,we evaluated the detection performance and repeatability of the sensor.This method provides a simple and effective solution for fabricating wearable flexible sensors and exhibits the potential to fabricate 3D complex flexible electronic devices.展开更多
Written feedback in English writing classes serves as the primary mode of feedback.By comparing direct corrective feedback and indirect corrective feedback in addressing content and form,this paper argues that indirec...Written feedback in English writing classes serves as the primary mode of feedback.By comparing direct corrective feedback and indirect corrective feedback in addressing content and form,this paper argues that indirect corrective feedback better aligns with the needs of English majors.Multiple factors influence the choice of written feedback methods,and teachers should carefully select the most appropriate approach based on student characteristics to maximize the effectiveness of feedback.展开更多
The emergence of Artificial Intelligence(AI)continues to disrupt the traditionally established processes in higher education institutions,including thesis supervision.While the challenges and benefits of AI use in aca...The emergence of Artificial Intelligence(AI)continues to disrupt the traditionally established processes in higher education institutions,including thesis supervision.While the challenges and benefits of AI use in academic contexts have been well documented,a knowledge gap exists in our understanding of how AI has changed students’approach to thesis writing and supervisor feedback.This study contributes to the knowledge of the AI-motivated issues in thesis supervision with insights from in-depth interviews with eight EFL thesis students at an English-medium-instruction university with a compulsory thesis component.Findings suggest that the traditional expectations of thesis supervision have changed due to AI use.As lower-order issues can be addressed with AI,students now expect content and research process-related guidance.While AI poses considerable challenges due to interaction patterns,information relevance,and accuracy,students are learning to successfully navigate these challenges while taking full advantage of editing and language instruction functions that AI provides,thus significantly reducing their and their supervisors’workload and logistics.Since these skills take time to develop,universities are advised to actively incorporate AI instruction in the Writing Center operations.Further suggestions on AI integration in the supervision process are provided.展开更多
文摘Process-oriented writing is the main way for teachers to precisely control the problems and weak links presented by students in each writing stage.Therefore,it is possible to design teaching activities that are in line with their cognitive levels based on students’needs;promote writing through debate,attach importance to the high integration of reading,speaking,and writing;and strengthen the subjectivity of students in writing by taking interest as the lead and life as the source.
文摘Research in L2 writing assessment has overwhelmingly focused on helping students enhance their writing quality and global development in language proficiency by various means and approaches of assessment.However,studies of the learning on the part of EFL writing teachers,especially when engaging in collaborative assessment with students,are few and far between.This qualitative case study therefore fills this void of foregoing research by examining the learning and development of a Chinese EFL writing teacher who employed teacher-student collaborative assessment(TSCA)(Wen,2016)in an L2 academic writing course.Drawing upon multiple types of data,three themes emerged with regard to the learning of the L2 writing teacher:1)becoming more assessment literate and capable of providing constructive feedback;2)gaining more efficacy in instructional tactics,student engagement and classroom management;and 3)developing a better understanding of students’evaluation focus as well as their needs and expertise in writing.This study offers a robust picture of how TSCA can foster multidimensional teacher learning-cognitively,affectively,and relationally-affirming its value not only as an assessment tool but as a transformative pedagogical practice.
文摘Giant panda writing is a classic form of thematic nature writing.Since the scientific discovery and the popularization of the giant panda by naturalists,this writing tradition has spanned nearly a century.Throughout this process,Chinese giant panda writing has developed its own distinct characteristics.Western giant panda writing encompasses genres such as scientific essays,fieldwork notes,and documentary works.Within Chinese giant panda writing,reportage,popular science works,and comprehensive,systematic documentary works all have representative authors and texts.In recent years,IP-oriented giant panda books have shown notable performance.While Chinese giant panda writing exhibits diverse types and perspectives,its scientific rigor,informative value,and innovative expression still require enhancement.As a form of thematic nature writing,giant panda writing provides valuable insights for writings on other subjects.
文摘The rapid development of artificial intelligence(AI)has brought significant changes to academic writing,raising important questions about authorship,originality,and how writing is taught and learned.While AI-based writing tools are now widely available,academic writing instruction has not kept pace and continues to rely on conventional pedagogical approaches.This paper introduces a conceptual framework called the Academic Writing and AI Integration(AWAI)Framework,which seeks to address this gap in a structured and pedagogically informed manner.Grounded in interdisciplinary scholarship,the AWAI Framework emphasizes the integration of three key elements:scholarly content knowledge,academic writing conventions,and AI literacy.Rather than reporting empirical findings,this study presents a theoretical model aimed at supporting educators and students as they navigate the opportunities and challenges posed by AI in academic contexts.The framework outlines a balanced approach to incorporating AI tools into writing instruction,while upholding the standards of academic rigor and ethical responsibility.Through this work,academic writing is reconsidered in light of emerging technological influences.The framework contributes to broader discussions about educational innovation and provides a foundation for future inquiry into the evolving relationship between human authors and intelligent systems in scholarly communication.
基金supported by the Macao Science and Technology Development Fund(FDCT)(No.0071/2023/RIB3)Joint Research Funding Program between the Macao Science and Technology Development Fund(FDCT)and the Department of Science and Technology of Guangdong Province(FDCTGDST)(No.0003-2024-AGJ).
文摘In this study,it aims at examining the differences between humangenerated and AI-generated texts in IELTS Writing Task 2.It especially focuses on lexical resourcefulness,grammatical accuracy,and contextual appropriateness.We analyzed 20 essays,including 10 human written ones by Chinese university students who have achieved an IELTS writing score ranging from 5.5 to 6.0,and 10 ChatGPT-4 Turbo-generated ones,using a mixed-methods approach,through corpus-based tools(NLTK,SpaCy,AntConc)and qualitative content analysis.Results showed that AI texts exhibited superior grammatical accuracy(0.4%–3%error rates for AI vs.20–26%for university students)but higher lexical repetition(17.2%to 23.25%for AI vs.17.68%for university students)and weaker contextual adaptability(3.33/10–3.69/10 for AI vs.3.23/10 to 4.14/10 for university students).While AI’s grammatical precision supports its utility as a corrective tool,human writers outperformed AI in lexical diversity and task-specific nuance.The findings advocate for a hybrid pedagogical model that leverages AI’s strengths in error detection while retaining human instruction for advanced lexical and contextual skills.Limitations include the small corpus and single-AI-model focus,suggesting future research with diverse datasets and longitudinal designs.
文摘The digital transformation of international Chinese language education is an important direction for enhancing the global dissemination effectiveness of the Chinese language.In teaching Chinese as a second language,writing,as a form of higher-order language output,has long faced challenges such as insufficient teacher resources,lagging feedback,and a lack of personalized support.Generative artificial intelligence(GAI)offers a new path for teaching Chinese writing.This study,with intermediate Chinese learners as the subjects,systematically explores the effectiveness of GAI-assisted Chinese writing instruction through a combination of controlled experiments and interviews based on a Chinese learning platform embedded with GAI.The study found that the GAI class was significantly superior to the traditional class in terms of the adequacy dimension of content quality and the grammatical and lexical dimensions of language quality;teachers and GAI play complementary roles in this process;most Chinese learners have a positive attitude towards this model.Based on the above findings,this study presents three suggestions:using GAI to empower Chinese writing instruction,giving full play to the complementary advantages of human and machine,and enhancing the AI literacy of teachers and students to achieve two-way empowerment of human and machine,with the aim of promoting the intelligent development of international Chinese education.
文摘二语写作是二语习得研究领域的重要组成部分。运用CiteSpace软件对近十年发表在Journal of Second Language Writing的231篇实证研究论文进行可视化分析,研究发现:二语写作研究整体呈波动性上升趋势,研究规模较为稳定,研究关注度逐渐提升;二语写作研究领域暂未形成明显的核心作者和机构的合作网络;研究主题主要聚焦二语写作教学方法的多元化、二语写作反馈的多焦点、二语写作评估与测试的科学化,以及学习者个体差异的多维影响等方面。基于此,提出未来该领域发展需加强学者、机构之间的相互合作;关注个体学习者写作过程的认知特征与情感因素,尤其重视青少年二语学习过程的研究;扩大二语写作纵向研究规模,推动研究的深入发展。
文摘This study contests the prevalent perception of graffiti writing,especially tagging and bombing,as meaningless vandalism.It contends that graffiti is a form of expression with intrinsic political implications.Leveraging the notion of spatial justice and Jacques Ranciere's philosophy,I demonstrate how graffiti reclaims urban visibility against the commercial monopoly of visibility in public spaces and challenges the inequitable allocation of opportunities for self-expression in modern cities.Despite writers'common denial of political motives,their actions may be interpreted as manifestations of resistance within wider sociospatial conflicts.This study situates grffti within discussions of political art,spatial commodification,and everyday resistance,proposing a normative framework for viewing the art of the urban signature as an activity that redefines"the community that speaks."
文摘This paper reveals and categorizes the most typical writing problems found amongst the Chinese university students.It also analyzes the underlying causes.The findings could have implications for all Chinese English learners.In the end,the author presents suggestions for the improvement of the English writing teaching in China.
基金supported by State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China.
文摘To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composites.The rheological properties of the composite inks were systematically analyzed to assess the effects of phenolic resin(PR)and carbon fiber(CF)content.Results show pronounced shear-thinning behavior and strong thixotropy-both essential for stable DIW.Additionally,UV/heat curing behavior was characterized to provide theoretical insights for optimizing curing parameters.Notably,CF addition is found to significantly attenuate UV light penetration compared to pure PR.As CF content increases,the critical UV irradiation energy rises sharply from 68.47 to 911.19 mJ/cm^(2),necessitating precise adjustments to curing parameters.Preforms were pyrolyzed in a carbon tube furnace to examine pore-formation characteristics,and chemical vapor infiltration(CVI)was applied to filling the resulting pores,yielding C/C composites with a flexural strength of 115.19 MPa.
基金supported by National Key Research and Development Program of China(Grant No.2022YFB3809000)Major Science and Technology Project of Gansu Province(Grant No.23ZDGA011)+1 种基金National Natural Science Foundation of China(Grant No.22275199,52105224)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB04701022021).
文摘Compared to subtractive manufacturing and casting,3D printing(additive manufacturing)offers advantages,such as the rapid production of complex structures,reduced material waste,and environmental friendliness.Direct ink writing(DIW)is one of the most popular 3D printing techniques owing to its ability to print multiple materials simultaneously and its high compatibility with printing inks.However,DIW presents significant challenges,particularly in the printing of high-performance polymers.The main challenges are as follows:1.The rigid structures and reaction kinetics of high-performance polymers make developing new inks difficult.2.The limited types of available high-performance polymers underscore the need for new DIW-suitable materials.3.Layer-by-layer stacking weakens interlayer bonding,affecting the mechanical properties of the printed product.4.The accuracy and speed of DIW printing are insufficient for large-scale manufacturing.After introducing the topic,the requirements for DIW printing inks are first reviewed,emphasizing the importance of thixotropic agents.Then,research progress regarding DIW printing of high-performance polymers is comprehensively reviewed according to the requirements of different polymer inks.Additionally,the applications of these materials across various fields are summarized.Finally,the challenges in DIW printing of high-performance polymers,along with corresponding solutions and future development prospects,are discussed in detail.
文摘This paper examines the disease writing in Jesmyn Ward’s Sing,Unburied,Sing,focusing on its metaphorical implications at three levels.Through an analysis of three central diseases-Mam’s cancer,Leonie’s drug addiction,and Kayla’s fever and vomiting,this study reveals how Ward employs illness as a lens to critique systemic racism,social injustice,and intergenerational trauma in the American South.Mam’s cancer symbolizes emotional repression and historical wounds inflicted upon Black Americans,while Leonie’s addiction reflects both personal escapism and the destructive consequences of racial and social marginalization.Kayla’s symptoms,along with other people’s symtom of vomiting,serve as visceral expressions of psychological rejection and resistance to oppression.Drawing on Sontag’s theories of illness as metaphor,the paper argues that Ward’s disease narratives transcend individual suffering,exposing the pervasive“diseases”of racism and inequality in society.The novel’s portrayal of illness underscores the resilience of Black communities and the urgent need for collective healing from cultural trauma.
基金supported by the National Key Research and Development Program of China(2023YFB4605100)the Shaanxi Provincial Key Research and Development Program(2019ZDLGY01-09 and 2021ZDLGY10-02)the State Key Laboratory of Solidification Processing(SKLSP202203).
文摘The fabrication of nanostructures beyond the diffraction limit has been the focus of nanotechnology research.Scanning probe microscopy(SPM)has attracted the attention of researchers for the detection and manufacture of nanostructures.Here,a nanosecond laser irradiated a cantilevered scanning nearfield optical microscopy(SNOM)tip and directly wrote subwavelength nanostructures on Au nano-film,without the assistance of a mask or vacuum atmosphere.This method was stable and reproducible for long-term use.The in situ morphology detection was conducted after the writing process by atomic force microscope(AFM).A feature linewidth of approximately 83.6 nm(<k/6)was confirmed using scanning electron microscopy(SEM).Linewidth of(167.8±6.6)nm was reproduced stably.Theoretical calculations revealed that the elliptical heat distribution under the SNOM tip generated different linewidths when the tip scanned vertically and horizontally.It also interpreted the influential mechanism of single-pulse energy.The simulated linewidths were consistent with the fabricated linewidths.According to the elemental analysis by energy dispersive spectrometer(EDS),the mechanism of this method can be interpreted asmelting of the Au nano-film instead of oxidation.Owing to its high positioning,machining accuracy,and instantaneous energy,this technology is considered convenient and economical for nanostructure fabrication and is proposed to be applied in nanolithography on multiple materials in the future.
基金the National Key Research and Development Program of China(No.2020YFB1313100)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA16020803)+2 种基金the National Natural Science Foundation of China(Nos.51875557 and 52205319)the Research Equipment Development Program of the Chinese Academy of Sciences(No.YJKYYQ20190045)the Foundation of State Key Laboratory of Robotics(Nos.2021-Z01,2022-Z04 and 2023-Z01)。
文摘Flexible electronic technology has laid the foundation for complex human-computer interaction system,and has attracted great attention in the field of human motion detection and soft robotics.Graphene has received an extensive attention due to its excellent electrical conductivity;however,how to use it to fabricate wearable flexible sensors with complex structures remains challenging.In this study,we studied the rheological behavior of graphene/polydimethylsiloxane ink and proposed an optimal graphene ratio,which makes the ink have an good printability and conductivity at the same time.Then,based on the theory of Peano fractal layout,we proposed a two-dimensional structure that can withstand multi-directional tension by replacing the traditional arris structure with the arc structure.After that,we manufactured circular arc fractal structure sensor by adjusting ink composition and printing structure through direct ink writing method.Finally,we evaluated the detection performance and repeatability of the sensor.This method provides a simple and effective solution for fabricating wearable flexible sensors and exhibits the potential to fabricate 3D complex flexible electronic devices.
文摘Written feedback in English writing classes serves as the primary mode of feedback.By comparing direct corrective feedback and indirect corrective feedback in addressing content and form,this paper argues that indirect corrective feedback better aligns with the needs of English majors.Multiple factors influence the choice of written feedback methods,and teachers should carefully select the most appropriate approach based on student characteristics to maximize the effectiveness of feedback.
文摘The emergence of Artificial Intelligence(AI)continues to disrupt the traditionally established processes in higher education institutions,including thesis supervision.While the challenges and benefits of AI use in academic contexts have been well documented,a knowledge gap exists in our understanding of how AI has changed students’approach to thesis writing and supervisor feedback.This study contributes to the knowledge of the AI-motivated issues in thesis supervision with insights from in-depth interviews with eight EFL thesis students at an English-medium-instruction university with a compulsory thesis component.Findings suggest that the traditional expectations of thesis supervision have changed due to AI use.As lower-order issues can be addressed with AI,students now expect content and research process-related guidance.While AI poses considerable challenges due to interaction patterns,information relevance,and accuracy,students are learning to successfully navigate these challenges while taking full advantage of editing and language instruction functions that AI provides,thus significantly reducing their and their supervisors’workload and logistics.Since these skills take time to develop,universities are advised to actively incorporate AI instruction in the Writing Center operations.Further suggestions on AI integration in the supervision process are provided.
