期刊文献+
共找到37,144篇文章
< 1 2 250 >
每页显示 20 50 100
交互式数字叙事:加拿大Writing New Body Worlds阅读治疗新探索
1
作者 牟晓青 于志涛 《图书馆论坛》 北大核心 2024年第4期222-230,F0003,共10页
文章基于相关研究文献与语料,对加拿大WNB阅读治疗实践进行梳理与归纳。WNB首次使用交互式数字叙事技术,构建面向公众的阅读治疗平台,以其交互式特征,融合了阅读和治疗引导两个过程,提供可访问的非临床方式,可面向大规模人群实现预防性... 文章基于相关研究文献与语料,对加拿大WNB阅读治疗实践进行梳理与归纳。WNB首次使用交互式数字叙事技术,构建面向公众的阅读治疗平台,以其交互式特征,融合了阅读和治疗引导两个过程,提供可访问的非临床方式,可面向大规模人群实现预防性健康干预。基于数据与计算的精准化阅读治疗是数字人文视角下的新变革,更具推广应用价值;以在线阅读平台建设为依托,推进实施平台化的阅读和治疗应成为未来发展方向之一;基于阅读形态与体验因技术赋能而改变的现状,图书馆应发挥引领作用,积极收集、创建或协助创建数字故事,推进阅读推广、服务与治疗的融合性发展,成为社区建设促进者、历史欣赏者和社区参与倡导者,也使阅读借助交互式数字叙事这一新载体,更好地发挥变革的力量,促进健康与幸福。 展开更多
关键词 交互式数字叙事 阅读治疗 writing New Body Worlds 加拿大
下载PDF
Generative adversarial networks based motion learning towards robotic calligraphy synthesis
2
作者 Xiaoming Wang Yilong Yang +3 位作者 Weiru Wang Yuanhua Zhou Yongfeng Yin Zhiguo Gong 《CAAI Transactions on Intelligence Technology》 SCIE EI 2024年第2期452-466,共15页
Robot calligraphy visually reflects the motion capability of robotic manipulators.While traditional researches mainly focus on image generation and the writing of simple calligraphic strokes or characters,this article... Robot calligraphy visually reflects the motion capability of robotic manipulators.While traditional researches mainly focus on image generation and the writing of simple calligraphic strokes or characters,this article presents a generative adversarial network(GAN)-based motion learning method for robotic calligraphy synthesis(Gan2CS)that can enhance the efficiency in writing complex calligraphy words and reproducing classic calligraphy works.The key technologies in the proposed approach include:(1)adopting the GAN to learn the motion parameters from the robot writing operation;(2)converting the learnt motion data into the style font and realising the transition from static calligraphy images to dynamic writing demonstration;(3)reproducing high-precision calligraphy works by synthesising the writing motion data hierarchically.In this study,the motion trajectories of sample calligraphy images are firstly extracted and converted into the robot module.The robot performs the writing with motion planning,and the writing motion parameters of calligraphy strokes are learnt with GANs.Then the motion data of basic strokes is synthesised based on the hierarchical process of‘stroke-radicalpart-character’.And the robot re-writes the synthesised characters whose similarity with the original calligraphy characters is evaluated.Regular calligraphy characters have been tested in the experiments for method validation and the results validated that the robot can actualise the robotic calligraphy synthesis of writing motion data with GAN. 展开更多
关键词 calligraphy synthesis generative adversarial networks Motion learning robot writing
下载PDF
Deep-subwavelength single grooves prepared by femtosecond laser direct writing on Si
3
作者 叶瑞熙 黄敏 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第8期108-115,共8页
It is well known that femtosecond laser pulses can easily spontaneously induce deep-subwavelength periodic surface structures on transparent dielectrics but not on non-transparent semiconductors.Nevertheless,in this s... It is well known that femtosecond laser pulses can easily spontaneously induce deep-subwavelength periodic surface structures on transparent dielectrics but not on non-transparent semiconductors.Nevertheless,in this study,we demonstrate that using high-numerical-aperture 800 nm femtosecond laser direct writing with controlled pulse energy and scanning speed in the near-damage-threshold regime,polarization-dependent deep-subwavelength single grooves with linewidths of~180 nm can be controllably prepared on Si.Generally,the single-groove linewidth increases slightly with increase in the pulse energy and decrease in the scanning speed,whereas the single-groove depth significantly increases from~300 nm to~600 nm with decrease in the scanning speed,or even to over 1μm with multi-processing,indicating the characteristics of transverse clamping and longitudinal growth of such deep-subwavelength single grooves.Energy dispersive spectroscopy composition analysis of the near-groove region confirms that single-groove formation tends to be an ultrafast,non-thermal ablation process,and the oxidized deposits near the grooves are easy to clean up.Furthermore,the results,showing both the strong dependence of groove orientation on laser polarization and the occurrence of double-groove structures due to the interference of pre-formed orthogonal grooves,indicate that the extraordinary field enhancement of strong polarization sensitivity in the deep-subwavelength groove plays an important role in single-groove growth with high stability and collimation. 展开更多
关键词 femtosecond-laser direct writing of Si deep-subwavelength single grooves polarization dependence high numerical aperture ultrafast non-thermal ablation
下载PDF
Scoring and Consequential Validity Evidence of Computer-and Paper-Based Writing Tests in Times of Change
4
作者 María GUAPACHA-CHAMORRO Orlando CHAVES-VARÓN 《Chinese Journal of Applied Linguistics》 2024年第3期450-480,525,共32页
Little is known about how the assessment modality,i.e.,computer-based(CB)and paper-based(PB)tests,affects language teachers’scorings,perceptions,and preferences and,therefore,the validity and fairness of classroom wr... Little is known about how the assessment modality,i.e.,computer-based(CB)and paper-based(PB)tests,affects language teachers’scorings,perceptions,and preferences and,therefore,the validity and fairness of classroom writing assessments.The present mixed-methods study used Shaw and Weir’s(2007)sociocognitive writing test validation framework to examine the scoring and consequential validity evidence of CB and PB writing tests in EFL classroom assessment in higher education.Original handwritten and word-processed texts of 38 EFL university students were transcribed to their opposite format and assessed by three language lecturers(N=456 texts,152 per teacher)to examine the scoring validity of CB and PB tests.The teachers’perceptions of text quality and preferences for assessment modality accounted for the consequential validity evidence of both tests.Findings revealed that the assessment modality impacted teachers’scorings,perceptions,and preferences.The teachers awarded higher scores to original and transcribed handwritten texts,particularly text organization and language use.The teachers’perceptions of text quality differed from their ratings,and physical,psychological,and experiential characteristics influenced their preferences for assessment modality.The results have implications for the validity and fairness of CB and PB writing tests and teachers’assessment practices. 展开更多
关键词 scoring validity consequential validity CB and PB writing tests classroom assessment
下载PDF
A Study on the Effects of Different Interaction Combinations and Language Levels on Continuous Writing in Online Environments
5
作者 Xuefei Zhu 《Journal of Contemporary Educational Research》 2024年第4期255-263,共9页
This study was conducted with non-English sophomore students,aiming to explore the effects of different interaction combinations and language levels on continuous writing in an online environment,and compare the diffe... This study was conducted with non-English sophomore students,aiming to explore the effects of different interaction combinations and language levels on continuous writing in an online environment,and compare the differences in lexical alignments and composition quality of learners with different interaction combinations and language levels in the same continuous writing task through experiments.The results show that the mean values of the word-phrase alignment of the paired group were higher than those of the individual group in different interaction combinations,and the two groups showed significant differences;in terms of composition quality,the individual group was better than the paired group,but there was no significant difference between the two groups in terms of task continuation.Secondly,the word-phrase alignment and composition scores of the different language-level groups were higher than those of the same language-level groups,and there was a significant difference between the two groups in terms of word-phrase alignments,but not in terms of composition scores.The results of this study can be useful and informative for second language teachers in future continuous teaching in online environments. 展开更多
关键词 Online environment Continuous writing Interaction combinations Language levels
下载PDF
A Study on the Correlation Between LIWC Word Categories and Chinese Composition Writing Performance of Fourth,Fifth,and Sixth Grade Students
6
作者 Yufeng Wu 《Journal of Contemporary Educational Research》 2024年第1期199-206,共8页
This study focuses on the analysis of the Chinese composition writing performance of fourth,fifth,and sixth grade students in 16 selected schools in Longhua District,Shenzhen during the spring semester of 2023.Using L... This study focuses on the analysis of the Chinese composition writing performance of fourth,fifth,and sixth grade students in 16 selected schools in Longhua District,Shenzhen during the spring semester of 2023.Using LIWC(Linguistic Inquiry and Word Count)as a text analysis tool,the study explores the impact of LIWC categories on writing performance which is scaled by score.The results show that the simple LIWC word categories have a significant positive influence on the composition scores of lower-grade students;while complex LIWC word categories have a significant negative influence on the composition scores of lower-grade students but a significant positive influence on the composition scores of higher-grade students.Process word categories have a positive influence on the composition scores of all three grades,but the impact of complex process word categories increases as the grade level rises. 展开更多
关键词 Chinese composition LIWC word categories writing performance Grades Text mining
下载PDF
Exploring Pedagogical Ideologies and Strategies for College English Writing Instruction from a Generative Artificial Intelligence Perspective
7
作者 Boya Zhang 《Journal of Contemporary Educational Research》 2024年第1期173-178,共6页
This study,drawing on the commonalities between generative artificial intelligence and foreign language writing instruction,outlines the core ideology of digital humanities-based college English writing instruction,in... This study,drawing on the commonalities between generative artificial intelligence and foreign language writing instruction,outlines the core ideology of digital humanities-based college English writing instruction,including auxiliary use of generative artificial intelligence tools,primary focus on humanistic education,and the re-production of knowledge,aiming to foster students’critical thinking,collaborative skills,and creativity.Building on this foundation,the study delves into generative artificial intelligence tools applicable to different stages of process-genre writing and their strategic applications.The use of generative artificial intelligence tools is beneficial for students to present,discuss,and share writing content,encouraging them to enhance their writing,collaboration,critical thinking,and creative abilities through deep interaction with model essays and creative discourses. 展开更多
关键词 Generative artificial intelligence College English writing instruction Process-genre approach Ideologies and strategies
下载PDF
Challenges and Coping Strategies Adopted by Postgraduate Students of Agricultural Education in Thesis Writing in Nigerian Universities
8
作者 Vincent C. Asogwa Adoo D. Wombo Charles U. Ugwuoke 《American Journal of Operations Research》 2014年第5期311-318,共8页
The study investigated challenges encountered and coping strategies adopted by postgraduate students of agricultural education in writing thesis in Nigerian universities. Two research questions and two hypotheses guid... The study investigated challenges encountered and coping strategies adopted by postgraduate students of agricultural education in writing thesis in Nigerian universities. Two research questions and two hypotheses guided the study. The study was conducted in Nigerian universities offering post-graduate programme in agricultural education. The population for the study was 118 made up of 14 postgraduate diploma, 66 masters and 38 doctoral students writing thesis in agricultural education. The entire population was involved in the study. An instrument tilted: Challenges and Coping Strategies Questionnaire (CCSQ) was used for data collection. Three experts validated the questionnaire. Cronbach alpha reliability method was used to determine the internal consistency of the questionnaire. A reliability coefficient of 0.85 was obtained. A total of 97 copies of the questionnaire were returned representing 93 percent return rate. Data collected for the study were analyzed using mean and standard deviation to answer the research questions while Analysis of Variance was used to test hypothesis of no significant difference at P ≤ 0.05 level of significance. The statistical package for social sciences (SPSS) was the tool employed to analyze the data collected. It was found out that 28 challenges were encountered by postgraduate students of agricultural education in thesis writing while 15 coping strategies were adopted by postgraduate students of agricultural education in thesis writing. The recommendations were that postgraduate students of agricultural education who have abandoned their thesis writing should adopt the identified coping strategies to complete their programme among others. 展开更多
关键词 CHALLENGES COPING Strategies POSTGRADUATE Students Agricultural Education thesis writing
下载PDF
Laser direct writing of Ga_(2)O_(3)/liquid metal-based flexible humidity sensors 被引量:2
9
作者 Songya Cui Yuyao Lu +5 位作者 Depeng Kong Huayu Luo Liang Peng Geng Yang Huayong Yang Kaichen Xu 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2023年第7期30-39,共10页
Flexible and wearable humidity sensors play a vital role in daily point-of-care diagnosis and noncontact human-machine interactions.However,achieving a facile and high-speed fabrication approach to realizing flexible ... Flexible and wearable humidity sensors play a vital role in daily point-of-care diagnosis and noncontact human-machine interactions.However,achieving a facile and high-speed fabrication approach to realizing flexible humidity sensors remains a challenge.In this work,a wearable capacitive-type Ga_(2)O_(3)/liquid metal-based humidity sensor is demonstrated by a one-step laser direct writing technique.Owing to the photothermal effect of laser,the Ga_(2)O_(3)-wrapped liquid metal particles can be selectively sintered and converted from insulative to conductive traces with a resistivity of 0.19Ω·cm,while the untreated regions serve as active sensing layers in response to moisture changes.Under 95%relative humidity,the humidity sensor displays a highly stable performance along with rapid response and recover time.Utilizing these superior properties,the Ga_(2)O_(3)/liquid metal-based humidity sensor is able to monitor human respiration rate,as well as skin moisture of the palm under different physiological states for healthcare monitoring. 展开更多
关键词 laser direct writing liquid metal humidity sensors flexible electronics wearable sensors
下载PDF
The Writing Needs Analyzed from the Status of Graduation Thesis on English Major
10
作者 冯雷 《海外英语》 2010年第12X期94-95,共2页
the thesis analyzes the need of the thesis writing by English graduate students through the ways of investigation and talking which are focused on the status of the thesis writing,so that we can help them to change th... the thesis analyzes the need of the thesis writing by English graduate students through the ways of investigation and talking which are focused on the status of the thesis writing,so that we can help them to change the situations and improve their writing levels.At last,we hope that there can be some useful information provided for the syllabus of the graduate thesis curriculum. 展开更多
关键词 thesis writing NEED ATTITUDE CURRICULUM
下载PDF
ChatGPT as an Educational Tool: Opportunities, Challenges, and Recommendations for Communication, Business Writing, and Composition Courses 被引量:7
11
作者 Mohammad Awad AlAfnan Samira Dishari +1 位作者 Marina Jovic Koba Lomidze 《Journal of Artificial Intelligence and Technology》 2023年第2期60-68,共9页
This empirical study examines ChatGPT as an educational and learning tool.It investigates the opportunities and challenges that ChatGPT provides to the students and instructors of communication,business writing,and co... This empirical study examines ChatGPT as an educational and learning tool.It investigates the opportunities and challenges that ChatGPT provides to the students and instructors of communication,business writing,and composition courses.It also strives to provide recommendations.After conducting 30 theory-based and application-based ChatGPT tests,it is found that ChatGPT has the potential of replacing search engines as it provides accurate and reliable input to students.For opportunities,the study found that ChatGPT provides a platform for students to seek answers to theory-based questions and generate ideas for application-based questions.It also provides a platform for instructors to integrate technology in classrooms and conduct workshops to discuss and evaluate generated responses.For challenges,the study found that ChatGPT,if unethically used by students,may lead to human unintelligence and unlearning.This may also present a challenge to instructors as the use of ChatGPT negatively affects their ability to differentiate between meticulous and automation-dependent students,on the one hand,and measure the achievement of learning outcomes,on the other hand.Based on the outcome of the analysis,this study recommends communication,business writing,and composition instructors to(1)refrain from making theory-based questions as take-home assessments,(2)provide communication and business writing students with detailed case-based and scenario-based assessment tasks that call for personalized answers utilizing critical,creative,and imaginative thinking incorporating lectures and textbook material,(3)enforce submitting all take-home assessments on plagiarism detection software,especially for composition courses,and(4)integrate ChatGPT generated responses in classes as examples to be discussed in workshops.Remarkably,this study found that ChatGPT skillfully paraphrases regenerated responses in a way that is not detected by similarity detection software.To maintain their effectiveness,similarity detection software providers need to upgrade their software to avoid such incidents from slipping unnoticed. 展开更多
关键词 artificial intelligence business writing courses ChatGPT composition courses communication courses Turnitin
下载PDF
Periodic transparent nanowires in ITO film fabricated via femtosecond laser direct writing 被引量:2
12
作者 Qilin Jiang Long Chen +8 位作者 Jukun Liu Yuchan Zhang Shian Zhang Donghai Feng Tianqing Jia Peng Zhou Qian Wang Zhenrong Sun Hongxing Xu 《Opto-Electronic Science》 2023年第1期11-22,共12页
This paper reports the fabrication of regular large-area laser-induced periodic surface structures(LIPSSs)in indium tin oxide(ITO)films via femtosecond laser direct writing focused by a cylindrical lens.The regular LI... This paper reports the fabrication of regular large-area laser-induced periodic surface structures(LIPSSs)in indium tin oxide(ITO)films via femtosecond laser direct writing focused by a cylindrical lens.The regular LIPSSs exhibited good properties as nanowires,with a resistivity almost equal to that of the initial ITO film.By changing the laser fluence,the nanowire resistances could be tuned from 15 to 73 kΩ/mm with a consistency of±10%.Furthermore,the average transmittance of the ITO films with regular LIPSSs in the range of 1200-2000 nm was improved from 21%to 60%.The regular LIPSS is promising for transparent electrodes of nano-optoelectronic devices-particularly in the near-infrared band. 展开更多
关键词 transparent nanowires periodic surface nanostructures femtosecond laser direct writing ITO film anisotropic electrical conductivity
下载PDF
Implications of Output Hypothesis on College English Writing
13
作者 荣颖颖 《海外英语》 2011年第15期63-65,共3页
With the reform of college English course,the objectives,philosophy and models of Chinese EFL teaching have been deeply changed.So college students are required to have higher language proficiency;it is also a challen... With the reform of college English course,the objectives,philosophy and models of Chinese EFL teaching have been deeply changed.So college students are required to have higher language proficiency;it is also a challenge for the English teachers in our country.The traditional teaching mode should be changed.College English teaching is not only to input knowledge to students,but also to foster their skills on the application of knowledge,and excavate their potential in order to promote their language proficiency.Writing,as one of the efficient ways to measure students'comprehensive English ability,has attracted more attention in the field of English researches,which,however,got little improvement so far.What we can see from the requirements is that college students and teachers should put more attention on their output instead of input alone.Therefore,this paper intends to apply Swain's "Output Hypothesis" to the college English teaching of non-English major students in China,and make some teaching suggestions based on the three functions of the "Output Hypothesis". 展开更多
关键词 OUTPUT HYPOthesis English writing SECOND LANGUAGE ACQUISITION
下载PDF
Analysis on English Abstract Writing of Graduation Thesis:A Case Study
14
作者 周开林 《海外英语》 2010年第2X期123-124,共2页
It intends to explore characteristics of Chinese undergraduate students’ English abstract by analyzing the most common problemsoccurred in their writing. Some tentative strategies are also provided accordingly to imp... It intends to explore characteristics of Chinese undergraduate students’ English abstract by analyzing the most common problemsoccurred in their writing. Some tentative strategies are also provided accordingly to improve the current situation. Corpus approach isadopted to examine the length, structure and linguistic feature of selected abstracts and a statistical interpretation is also given. It reveals thatsome abstracts fail to meet the word limit of the requirement. 展开更多
关键词 ENGLISH ABSTRACT writing requirements LENGTH structure LANGUAGE FORMALITY
下载PDF
The Influence of Thesis Writing of Imperial Examinations on Prose in Tang and Song Dynasty
15
作者 Yuan Li 《International Journal of Technology Management》 2013年第8期98-100,共3页
关键词 论文写作 散文 宋代 唐代 科举制度 社会发展 唐宋时期
下载PDF
Multidimensional Quality Evaluation of Graduate Thesis:Based on the Probabilistic Linguistic MABAC Method
16
作者 Yuyan Luo Xiaoxu Zhang +2 位作者 Tao Tong Yong Qin Zheng Yang 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第11期2049-2076,共28页
Graduate education is the main way to train high-level innovative talents,the basic layout to cope with the global talent competition,and the important cornerstone for implementing the innovation-driven development st... Graduate education is the main way to train high-level innovative talents,the basic layout to cope with the global talent competition,and the important cornerstone for implementing the innovation-driven development strategy and building an innovation-driven country.Therefore,graduate education is of great remarkably to the development of national education.As an important manifestation of graduate education,the quality of a graduate thesis should receive more attention.It is conducive to promoting the quality of graduates by supervising and examining the quality of the graduate thesis.For this purpose,this work is based on textmining,expert interviews,and questionnaire surveys to obtain the factors influencing the quality of a graduate thesis first.Then,through three rounds of expert consultation,a multidimensional evaluation indicator system for the graduate thesis quality is built.Furthermore,probabilistic linguistic termsets(PLTSs)are utilized to obtain the initial evaluation information and apply the stepwise weight assessment ratio analysis method to determine the weights of attributes.In the ensuing step,the novel multi-attribute border approximation area comparison based on the PLTS method is established.Finally,the proposed method is employed in a case study concerning the quality evaluation of a graduate thesis and the effectiveness of this approach is further illustrated. 展开更多
关键词 Probabilistic linguistic term sets PL-MABAC SWARA quality evaluation graduate thesis
下载PDF
Research on the Course of Academic Thesis Writing based on the Teaching Reform
17
作者 Ni Wang 《Journal of Contemporary Educational Research》 2021年第6期81-86,共6页
Recently,the State Council has set higher standards for the graduation thesis of undergraduates.Most undergraduate colleges and universities have issued their own policies in which private colleges and universities ha... Recently,the State Council has set higher standards for the graduation thesis of undergraduates.Most undergraduate colleges and universities have issued their own policies in which private colleges and universities have paid more attention to this issue in which several local experts have conducted many research on the course of academic thesis writing.The Inner Mongolia Honder College of Arts and Sciences is used as an example in this article.Using the questionnaire survey and interview method,the current situation of the academic thesis writing course in private colleges is analyzed and its reform in private colleges and universities is explored in hope to provide some reference for future research. 展开更多
关键词 Questionnaire survey Graduation thesis Private colleges
下载PDF
Conceptual Knowledge of Writing:A Synthesis of Literature
18
作者 孔云军 《疯狂英语(理论版)》 2017年第3期73-74,共2页
An identification of conceptual knowledge of writing contributes to teachers'understanding of writing and their writing instruction.This paper synthesized various definitions of writing and portrayed writing as li... An identification of conceptual knowledge of writing contributes to teachers'understanding of writing and their writing instruction.This paper synthesized various definitions of writing and portrayed writing as linguistic product,cognitive process,social and cultural activities.These identifications and syntheses of writing may be of interest to practitioners. 展开更多
关键词 writing CONCEPTUAL knowledge TEXT WRITER READER
下载PDF
Automated writing evaluation(1995-2022):Research trends and implications 被引量:1
19
作者 ZHANG TINGYU LEI LEI 《语言测试与评价》 2023年第1期61-88,123,共29页
Automated writing evaluation is the use of computer programs to evaluate essays written in an educational setting.This study aims to evaluate the state of the art and the trends of automated writing evaluation researc... Automated writing evaluation is the use of computer programs to evaluate essays written in an educational setting.This study aims to evaluate the state of the art and the trends of automated writing evaluation research.A total of 206 automated writing evaluation-related publications published in 88 journals between 1995 and 2022 were used as the data in our study.Bibliometric methods were employed to identify the publication trends,venues for publication,productive authors,highly cited articles,seminal works,and the most frequently explored topics across the past decades.The findings show that automated writing evaluation has become a fast-growing interdisciplinary area of interest.In addition,this line of research has witnessed a growing interest in topics pertaining to the latest technology,the perception of children,the teachers’feedback,and complex tasks.Implications of our study for future research are also discussed. 展开更多
关键词 automated writing evaluation research trends bibliometric analysis
下载PDF
Direct ink writing to fabricate porous acetabular cups from titanium alloy
20
作者 Naima Valentin Weijian Hua +3 位作者 Ashish K.Kasar Lily Raymond Pradeep L.Menezes Yifei Jin 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2023年第2期121-135,共15页
Acetabular cups,which are among themost important implants in total hip arthroplasty,are usually made from titanium alloys with high porosity and adequate mechanical properties.The current three-dimensional(3D)printin... Acetabular cups,which are among themost important implants in total hip arthroplasty,are usually made from titanium alloys with high porosity and adequate mechanical properties.The current three-dimensional(3D)printing approaches to fabricate customized acetabular cups have some inherent disadvantages such as high cost and energy consumption,residual thermal stress,and relatively low efficiency.Thus,in this work,a direct ink writing method was developed to print a cup structure at room temperature,followed by multi-step heat treatment to form microscale porous structure within the acetabular cup.Our method is facilitated by the development of a self-supporting titanium-6 aluminum-4 vanadium(Ti64)ink that is composed of Ti64 particles,bentonite yield-stress additive,ultraviolet curable polymer,and photo-initiator.The effects of Ti64 and bentonite concentrations on the rheological properties and printability of inks were systematically investigated.Moreover,the printing conditions,geometrical limitations,and maximum curing depth were explored.Finally,some complex 3D structures,including lattices with different gap distances,honeycomb with a well-defined shape,and an acetabular cup with uniformly distributed micropores,were successfully printed/fabricated to validate the effectiveness of the proposed method. 展开更多
关键词 Acetabular cup Direct ink writing Titanium alloy BENTONITE Heat treatment
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部