This paper takes the assessment and evaluation of computational mechanics course as the background,and constructs a diversified course evaluation system that is student-centered and integrates both quantitative and qu...This paper takes the assessment and evaluation of computational mechanics course as the background,and constructs a diversified course evaluation system that is student-centered and integrates both quantitative and qualitative evaluation methods.The system not only pays attention to students’practical operation and theoretical knowledge mastery but also puts special emphasis on the cultivation of students’innovative abilities.In order to realize a comprehensive and objective evaluation,the assessment and evaluation method of the entropy weight model combining TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)multi-attribute decision analysis and entropy weight theory is adopted,and its validity and practicability are verified through example analysis.This method can not only comprehensively and objectively evaluate students’learning outcomes,but also provide a scientific decision-making basis for curriculum teaching reform.The implementation of this diversified course evaluation system can better reflect the comprehensive ability of students and promote the continuous improvement of teaching quality.展开更多
According to the standards of engineering education accreditation,the achievement paths and evaluation criteria of course goals are presented,aimed at the objectives of software engineering courses and the characteris...According to the standards of engineering education accreditation,the achievement paths and evaluation criteria of course goals are presented,aimed at the objectives of software engineering courses and the characteristics of hybrid teaching in Kunming University of Science and Technology.Then a multi-dimensional evaluation system for course goal achievement of software engineering is proposed.The practice’s results show that the multi-dimensional course goal achievement evaluation is helpful to the continuous improvement of course teaching,which can effectively support the evaluation of graduation outcomes.展开更多
Taking Dianchi Lakeview Golf Course in Kunming, Yunnan, China as the object of landscape evaluation, this paper constructed an evaluation index system with the functionality, beauty and ecology of the golf course as t...Taking Dianchi Lakeview Golf Course in Kunming, Yunnan, China as the object of landscape evaluation, this paper constructed an evaluation index system with the functionality, beauty and ecology of the golf course as the criteria, carried out the landscape evaluation of Dianchi Lakeview Golf Course using the semantic differential (SD), the analytic hierarchy process (AHP), the fuzzy comprehensive evaluation and other methods, and discussed the methods, indicators and models of landscape evaluation of urban golf courses.展开更多
With the rapid development of information technology,Science,Technology,Engineering,and Mathematics(STEM)education,as a crucial model for nurturing innovative talents,is gaining increasing attention.However,challenges...With the rapid development of information technology,Science,Technology,Engineering,and Mathematics(STEM)education,as a crucial model for nurturing innovative talents,is gaining increasing attention.However,challenges such as insufficient resources and a lack of diversity in teaching methods exist in its implementation.Against this backdrop,this article conducts an in-depth analysis of course design and evaluation system construction under the STEM education model.The aim is to explore effective teaching strategies and diversified evaluation methods,with the ultimate goal of enhancing the quality of education and cultivating students’comprehensive problem-solving skills.展开更多
The rapid advancement of information technology poses significant pedagogical challenges for basic computer courses in local colleges and universities.This study proposes a comprehensive framework for instructional in...The rapid advancement of information technology poses significant pedagogical challenges for basic computer courses in local colleges and universities.This study proposes a comprehensive framework for instructional innovation,encompassing the restructuring of course content,enrichment of teaching resources,reformulation of instructional methods,and the establishment of feedback channels,as well as a comprehensive framework for optimizing assessment mechanisms.The implementation of this framework has yielded remarkable outcomes,including heightened classroom engagement and academic rigor as well as an overall enhancement in students’critical thinking and practical skills.These transformative changes have propelled basic computer courses in local higher education institutions to a new stage while offering valuable insights for future pedagogical reforms.展开更多
Teaching team plays an important role in integrating teaching resources,improving the quality of teachers and the quality of education and teaching.This paper studies the characteristics of the basic course teaching t...Teaching team plays an important role in integrating teaching resources,improving the quality of teachers and the quality of education and teaching.This paper studies the characteristics of the basic course teaching team,and gives the principles of building the basic course teaching team performance evaluation index system and the specific performance evaluation index system,in order to provide a direction for the high-level construction of the teaching team.展开更多
This paper does some research and exploration of one of the most commonly used Chinese college English course book:Listening and Speaking Course(Second Edition 2010)compiled by Yu Shumei and Li Huiqin.It introduces th...This paper does some research and exploration of one of the most commonly used Chinese college English course book:Listening and Speaking Course(Second Edition 2010)compiled by Yu Shumei and Li Huiqin.It introduces the aims of the textbookand its structure.By evaluating the teaching functions of differnt parts,it can be safely concluded that this textbook is well quali-fied to be used.However,being inadequate in teaching listening strategies and lacking in teaching speaking strategies can affectstudents'listening and speaking in the long run.Therefore,it is strongly recommended that teachers should add more practicalstrategies and useful materials in their teaching procedures to make the textbook more applicable.展开更多
True,objective and impartial course and achievement evaluation is the requirement of modern higher vocational education,and can avoid " high scores and low abilities" of students to the maximum. This article...True,objective and impartial course and achievement evaluation is the requirement of modern higher vocational education,and can avoid " high scores and low abilities" of students to the maximum. This article focuses on expounding the " two connections and five combinations" dual evaluation modes of higher vocational gardening technology major students' achievement on practical courses,namely connection between major and industry; connection between achievement and occupation; combination of on-campus and off-campus teachers' evaluation;combination of process and results evaluation; combination of course evaluation and professional skill appraisal; combination of students' selfevaluation and teachers' evaluation; combination of examination paper and non-examination paper evaluation; combination of group and individual evaluation.展开更多
The present paper deals with development of a course evaluation survey (CES) questionnaire regarding evaluation of humanities courses (e.g., Commerce/Economics/Law) and assessment of its validity and reliability. Taki...The present paper deals with development of a course evaluation survey (CES) questionnaire regarding evaluation of humanities courses (e.g., Commerce/Economics/Law) and assessment of its validity and reliability. Taking help from available questionnaires and also incorporating views from the teachers of the related subjects, the relevant Likert type items were selected. The drafted version of the questionnaire was finalized taking into account feedback from the subject experts. The focus was on simple language to ensure clarity to the students to facilitate accuracy of the collected data. The developed questionnaire consists of five domains involving fifteen Likert type items including a global item. For assessment of its reliability and validity, data were collected among two groups of undergraduate students studying two courses namely Accounts (n = 190) and Law (n = 90). For assessing questionnaire, Karl Pearson Correlation Coefficient, Cronbach’s Alpha coefficient and four factor solutions under factor analysis were used. The analytical results were quite consistent across the data sets (that are, accounts, law and pooled together) that exhibit good psychometric properties. It may thus be concluded that the questionnaire is valid, reliable and may measure what it is intended to measure.展开更多
To improve high quality and/or retain achieved high quality of an academic program, time to time evaluation for quality of each covered course is often an integrated aspect considered in reputed institutions, however,...To improve high quality and/or retain achieved high quality of an academic program, time to time evaluation for quality of each covered course is often an integrated aspect considered in reputed institutions, however, there has been little effort regarding humanities courses. This research article deals with analysis of evaluation data collected regarding humanities course from a College of Commerce & Economics, Mumbai, Maharashtra, India, on Likert type items. Appropriateness of one parametric measure and three non-parametric measures are discussed and used in this regard which could provide useful clues for educational policy planners. Keeping in view of the analytical results using these four measures, regardless of the threshold regarding satisfaction among students, overall performance of almost every subject has been un-satisfactory. There is a need to make a focused approach to take every course at the level of high performance. The inconsistency noticed under every threshold further revealed that under such poorly performing subjects globally, one needs to analyze merely at the global level item. Once the global level analysis reveals high performance of a course, then only item specific analysis may need to be focused to find out the items requiring further improvements.展开更多
Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the need...Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the needs of social talents,optimize and adjust the teaching of preschool education courses,and improve the effectiveness of education and teaching.Referring to the teaching of the“Mandarin”course in preschool education,the secondary vocational schools need to achieve the following functions,namely,analyze the issues existing in the course teaching according to the results of teaching practice,and then explore the teaching improvement path of“Mandarin”course based on professional activity orientation in line with the“employment-oriented,service-oriented”career education goals,in order to improve the effectiveness of this teaching.展开更多
In this paper, we conduct research on the reform orientation of the college ideological and the political course system under background of the Chinese dream and new normal. The complex phenomenon of ideological and p...In this paper, we conduct research on the reform orientation of the college ideological and the political course system under background of the Chinese dream and new normal. The complex phenomenon of ideological and political education to our ideological and political education essence, grasp the law of ideological and political education to increase the difficulty. As an ideological and the political educators, it is necessary to continuously enhance the ability of dealing with the complex problems that is good at through the complex phenomenon of the ideological and political education, understanding and grasping the essence of the ideological and political education. We combine the primary analysis of the Chinese dream and new normal to form the optimal education paradigm for the college ideological and the political course system that is necessary.展开更多
The reform of ideological and political education in science and engineering courses continues to deepen,and the establishment of a practical teaching evaluation system is the main goal.Combining the relevant requirem...The reform of ideological and political education in science and engineering courses continues to deepen,and the establishment of a practical teaching evaluation system is the main goal.Combining the relevant requirements of the ideological and political education in science and engineering courses,establishing a teaching evaluation system needs to follow the corresponding principles to ensure that the teaching content is reasonable and the teaching objectives are clear.The selected teaching method is flexible and effective,which facilitates the improvement of teaching quality and feedback of teaching situation.In this regard,the paper mainly analyzes the principles and standards of ideological and political teaching evaluation for science and engineering courses,and chooses reasonable and operable measures in-line with actual requirements to apply them in practice,and strive to serve as a reference for subsequent related research.展开更多
The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the seme...The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the semester. Previous studies in this area have investigated the effects of instructional quality and academic demands separately and have been limited primarily to examining findings using student samples fromthe United States. With Japanese college students' perceptions of self-improvementin English language courses as the dependent variable, the present study directly tests the hypothesis that students who perceive instructional quality to be higher, andcourse demands to be greater, also estimate higher levels of self-improvement in English language skills. The analysis provides strong support for this hypothesis.Higher ratings of instruction and academic demands have already beenshown to increase levels of student learning(Greimel-Fuhrmann and Geyer 2003;Nois and Hudson 2006; Mc Fadden and Dart 1992). The present study is the first toprovide direct evidence of the relative importance of student evaluations ofinstructional quality and academic demands as predictors of student learning and thefirst ever to do so with a sample of Japanese college students enrolled in a required English as a foreign language course. Our hypothesis is that Japanese students whoperceive instructional quality to be higher, and course demands to be greater,estimate higher levels of self-improvement in English language skills. Thus we test Japanese students' attitudes toward instructional quality and course demands asindependent variables predicting their perceptions of self-improvement in English language courses. The research focuses on Japanese students' improvement in English language skills because English education in Japan is an arena in which thedebate over limited English proficiency rages on, and because other research suggests reconsideration of English education in light of the demands of the rapidly expanding global era(Amaki 2008).展开更多
Material evaluation is an important part of our course design in business English teaching.The article attempts a detailed analysis of the textbook First Insights into Business English by using a set of criteria well ...Material evaluation is an important part of our course design in business English teaching.The article attempts a detailed analysis of the textbook First Insights into Business English by using a set of criteria well justified by the relevant course design rationale within a communicative teaching and learning framework.展开更多
The distribution characteristics of air voids in ultrathin asphalt friction course(UAFC) samples with different gradations and compaction methods were statistically analyzed using X-ray computed tomography(CT) and ima...The distribution characteristics of air voids in ultrathin asphalt friction course(UAFC) samples with different gradations and compaction methods were statistically analyzed using X-ray computed tomography(CT) and image analysis techniques. Based on the results, compared with the AC-5 sample, the OGFC-5mixture has a higher air void ratio, a larger air void size and a greater number of air voids, with the distribution of internal air voids being more uniform and their shapes being more rounded. The two-parameter Weibull function was applied to fit the gradation of air voids. The fitting results is good, and the function parameters are sensitive to changes in both mineral gradation and compaction method. Moreover, two homogeneity indices were proposed to evaluate the compaction uniformity of UAFC samples. Compared with the Marshall method,the SGC method is more conducive to improve the compaction uniformity of UAFC samples. The compaction method significantly influences the air void distribution characteristics and compaction uniformity of AC-5sample, but has a less significant impact on OGFC-5 sample. The experimental results in the study provides a solid foundation for further explorations on the internal structure and mixture design of UAFC.展开更多
This paper argues that the present vocabulary teaching needs reorienting so as to achieve a more systematic and principled vocabulary teaching suitable for China's non-English majors. The author then tries to propose...This paper argues that the present vocabulary teaching needs reorienting so as to achieve a more systematic and principled vocabulary teaching suitable for China's non-English majors. The author then tries to propose a new model of vocabulary teaching, which consists of explicit instruction, incidental learning and strategy training.展开更多
基金2024 Key Project of Teaching Reform Research and Practice in Higher Education in Henan Province“Exploration and Practice of Training Model for Outstanding Students in Basic Mechanics Discipline”(2024SJGLX094)Henan Province“Mechanics+X”Basic Discipline Outstanding Student Training Base2024 Research and Practice Project of Higher Education Teaching Reform in Henan University of Science and Technology“Optimization and Practice of Ability-Oriented Teaching Mode for Computational Mechanics Course:A New Exploration in Cultivating Practical Simulation Engineers”(2024BK074)。
文摘This paper takes the assessment and evaluation of computational mechanics course as the background,and constructs a diversified course evaluation system that is student-centered and integrates both quantitative and qualitative evaluation methods.The system not only pays attention to students’practical operation and theoretical knowledge mastery but also puts special emphasis on the cultivation of students’innovative abilities.In order to realize a comprehensive and objective evaluation,the assessment and evaluation method of the entropy weight model combining TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)multi-attribute decision analysis and entropy weight theory is adopted,and its validity and practicability are verified through example analysis.This method can not only comprehensively and objectively evaluate students’learning outcomes,but also provide a scientific decision-making basis for curriculum teaching reform.The implementation of this diversified course evaluation system can better reflect the comprehensive ability of students and promote the continuous improvement of teaching quality.
基金supported by the Undergraduate Education and Teaching Reform Research Project of Yunnan Province(JG2023157)Support Program for Yunnan Talents(CA23138L010A)+2 种基金Yunnan Higher Education Undergraduate Teaching Achievement Project(202246)National First class Undergraduate Course Construction Project of Software Engineering(109620210004)Software Engineering Virtual Teaching and Research Office Construction Project of Kunming University of Science and Technology(109620220031)。
文摘According to the standards of engineering education accreditation,the achievement paths and evaluation criteria of course goals are presented,aimed at the objectives of software engineering courses and the characteristics of hybrid teaching in Kunming University of Science and Technology.Then a multi-dimensional evaluation system for course goal achievement of software engineering is proposed.The practice’s results show that the multi-dimensional course goal achievement evaluation is helpful to the continuous improvement of course teaching,which can effectively support the evaluation of graduation outcomes.
基金Sponsored by the Science Research Fund of Yunnan Provincial Department of Education(2014Y662)
文摘Taking Dianchi Lakeview Golf Course in Kunming, Yunnan, China as the object of landscape evaluation, this paper constructed an evaluation index system with the functionality, beauty and ecology of the golf course as the criteria, carried out the landscape evaluation of Dianchi Lakeview Golf Course using the semantic differential (SD), the analytic hierarchy process (AHP), the fuzzy comprehensive evaluation and other methods, and discussed the methods, indicators and models of landscape evaluation of urban golf courses.
文摘With the rapid development of information technology,Science,Technology,Engineering,and Mathematics(STEM)education,as a crucial model for nurturing innovative talents,is gaining increasing attention.However,challenges such as insufficient resources and a lack of diversity in teaching methods exist in its implementation.Against this backdrop,this article conducts an in-depth analysis of course design and evaluation system construction under the STEM education model.The aim is to explore effective teaching strategies and diversified evaluation methods,with the ultimate goal of enhancing the quality of education and cultivating students’comprehensive problem-solving skills.
基金2022 Inner Mongolia Higher Education Association-Higher Education Research Key Topic“Innovation and Practice of Teaching Basic Computer Courses in Local Universities”(Project number:NMGJXH-2022XB026)。
文摘The rapid advancement of information technology poses significant pedagogical challenges for basic computer courses in local colleges and universities.This study proposes a comprehensive framework for instructional innovation,encompassing the restructuring of course content,enrichment of teaching resources,reformulation of instructional methods,and the establishment of feedback channels,as well as a comprehensive framework for optimizing assessment mechanisms.The implementation of this framework has yielded remarkable outcomes,including heightened classroom engagement and academic rigor as well as an overall enhancement in students’critical thinking and practical skills.These transformative changes have propelled basic computer courses in local higher education institutions to a new stage while offering valuable insights for future pedagogical reforms.
基金the 13th"Five-Year Plan"Project of Tianjin Educational Science:"Research on the Dynamic Monitoring Mechanism of Discipline Construction Performance in Colleges and Universities"(HE3078).
文摘Teaching team plays an important role in integrating teaching resources,improving the quality of teachers and the quality of education and teaching.This paper studies the characteristics of the basic course teaching team,and gives the principles of building the basic course teaching team performance evaluation index system and the specific performance evaluation index system,in order to provide a direction for the high-level construction of the teaching team.
文摘This paper does some research and exploration of one of the most commonly used Chinese college English course book:Listening and Speaking Course(Second Edition 2010)compiled by Yu Shumei and Li Huiqin.It introduces the aims of the textbookand its structure.By evaluating the teaching functions of differnt parts,it can be safely concluded that this textbook is well quali-fied to be used.However,being inadequate in teaching listening strategies and lacking in teaching speaking strategies can affectstudents'listening and speaking in the long run.Therefore,it is strongly recommended that teachers should add more practicalstrategies and useful materials in their teaching procedures to make the textbook more applicable.
基金Supported by Provincial Key Major(Gardening Technology)Construction Project for Sichuan Vocational CollegesTeaching Reform Project of Chengdu Agricultural College(JG2015-18)
文摘True,objective and impartial course and achievement evaluation is the requirement of modern higher vocational education,and can avoid " high scores and low abilities" of students to the maximum. This article focuses on expounding the " two connections and five combinations" dual evaluation modes of higher vocational gardening technology major students' achievement on practical courses,namely connection between major and industry; connection between achievement and occupation; combination of on-campus and off-campus teachers' evaluation;combination of process and results evaluation; combination of course evaluation and professional skill appraisal; combination of students' selfevaluation and teachers' evaluation; combination of examination paper and non-examination paper evaluation; combination of group and individual evaluation.
文摘The present paper deals with development of a course evaluation survey (CES) questionnaire regarding evaluation of humanities courses (e.g., Commerce/Economics/Law) and assessment of its validity and reliability. Taking help from available questionnaires and also incorporating views from the teachers of the related subjects, the relevant Likert type items were selected. The drafted version of the questionnaire was finalized taking into account feedback from the subject experts. The focus was on simple language to ensure clarity to the students to facilitate accuracy of the collected data. The developed questionnaire consists of five domains involving fifteen Likert type items including a global item. For assessment of its reliability and validity, data were collected among two groups of undergraduate students studying two courses namely Accounts (n = 190) and Law (n = 90). For assessing questionnaire, Karl Pearson Correlation Coefficient, Cronbach’s Alpha coefficient and four factor solutions under factor analysis were used. The analytical results were quite consistent across the data sets (that are, accounts, law and pooled together) that exhibit good psychometric properties. It may thus be concluded that the questionnaire is valid, reliable and may measure what it is intended to measure.
文摘To improve high quality and/or retain achieved high quality of an academic program, time to time evaluation for quality of each covered course is often an integrated aspect considered in reputed institutions, however, there has been little effort regarding humanities courses. This research article deals with analysis of evaluation data collected regarding humanities course from a College of Commerce & Economics, Mumbai, Maharashtra, India, on Likert type items. Appropriateness of one parametric measure and three non-parametric measures are discussed and used in this regard which could provide useful clues for educational policy planners. Keeping in view of the analytical results using these four measures, regardless of the threshold regarding satisfaction among students, overall performance of almost every subject has been un-satisfactory. There is a need to make a focused approach to take every course at the level of high performance. The inconsistency noticed under every threshold further revealed that under such poorly performing subjects globally, one needs to analyze merely at the global level item. Once the global level analysis reveals high performance of a course, then only item specific analysis may need to be focused to find out the items requiring further improvements.
文摘Along with the increasing demand for kindergarten teachers,as the cradle of talent training,the secondary vocational schools are required to reasonably formulate educational talent training plans according to the needs of social talents,optimize and adjust the teaching of preschool education courses,and improve the effectiveness of education and teaching.Referring to the teaching of the“Mandarin”course in preschool education,the secondary vocational schools need to achieve the following functions,namely,analyze the issues existing in the course teaching according to the results of teaching practice,and then explore the teaching improvement path of“Mandarin”course based on professional activity orientation in line with the“employment-oriented,service-oriented”career education goals,in order to improve the effectiveness of this teaching.
文摘In this paper, we conduct research on the reform orientation of the college ideological and the political course system under background of the Chinese dream and new normal. The complex phenomenon of ideological and political education to our ideological and political education essence, grasp the law of ideological and political education to increase the difficulty. As an ideological and the political educators, it is necessary to continuously enhance the ability of dealing with the complex problems that is good at through the complex phenomenon of the ideological and political education, understanding and grasping the essence of the ideological and political education. We combine the primary analysis of the Chinese dream and new normal to form the optimal education paradigm for the college ideological and the political course system that is necessary.
基金Heilongjiang Philosophy and Social Research Planning Project"Research on Joint Education of Ideological and Political Work in Colleges and Universities from the Perspective of Big Data"(Project No.20SZB09)Harbin University of Commerce Educational Reform Project"Research on the Integration of Ideological and Political Education and Professional Teaching——Taking Programming Courses as an Example"(Project No.HSDJY202021)。
文摘The reform of ideological and political education in science and engineering courses continues to deepen,and the establishment of a practical teaching evaluation system is the main goal.Combining the relevant requirements of the ideological and political education in science and engineering courses,establishing a teaching evaluation system needs to follow the corresponding principles to ensure that the teaching content is reasonable and the teaching objectives are clear.The selected teaching method is flexible and effective,which facilitates the improvement of teaching quality and feedback of teaching situation.In this regard,the paper mainly analyzes the principles and standards of ideological and political teaching evaluation for science and engineering courses,and chooses reasonable and operable measures in-line with actual requirements to apply them in practice,and strive to serve as a reference for subsequent related research.
文摘The term"student learning outcomes"refers to the knowledge, skills, and abilitiesthat students achieve during a course, and is typically assessed based on student evaluations conducted at the end of the semester. Previous studies in this area have investigated the effects of instructional quality and academic demands separately and have been limited primarily to examining findings using student samples fromthe United States. With Japanese college students' perceptions of self-improvementin English language courses as the dependent variable, the present study directly tests the hypothesis that students who perceive instructional quality to be higher, andcourse demands to be greater, also estimate higher levels of self-improvement in English language skills. The analysis provides strong support for this hypothesis.Higher ratings of instruction and academic demands have already beenshown to increase levels of student learning(Greimel-Fuhrmann and Geyer 2003;Nois and Hudson 2006; Mc Fadden and Dart 1992). The present study is the first toprovide direct evidence of the relative importance of student evaluations ofinstructional quality and academic demands as predictors of student learning and thefirst ever to do so with a sample of Japanese college students enrolled in a required English as a foreign language course. Our hypothesis is that Japanese students whoperceive instructional quality to be higher, and course demands to be greater,estimate higher levels of self-improvement in English language skills. Thus we test Japanese students' attitudes toward instructional quality and course demands asindependent variables predicting their perceptions of self-improvement in English language courses. The research focuses on Japanese students' improvement in English language skills because English education in Japan is an arena in which thedebate over limited English proficiency rages on, and because other research suggests reconsideration of English education in light of the demands of the rapidly expanding global era(Amaki 2008).
文摘Material evaluation is an important part of our course design in business English teaching.The article attempts a detailed analysis of the textbook First Insights into Business English by using a set of criteria well justified by the relevant course design rationale within a communicative teaching and learning framework.
基金Funded by Technology Innovation Demonstration Project of the Transportation Department of Yunnan Province (Science and Technology Education Section of Transport Department of Yunnan Province [2019](No.14)。
文摘The distribution characteristics of air voids in ultrathin asphalt friction course(UAFC) samples with different gradations and compaction methods were statistically analyzed using X-ray computed tomography(CT) and image analysis techniques. Based on the results, compared with the AC-5 sample, the OGFC-5mixture has a higher air void ratio, a larger air void size and a greater number of air voids, with the distribution of internal air voids being more uniform and their shapes being more rounded. The two-parameter Weibull function was applied to fit the gradation of air voids. The fitting results is good, and the function parameters are sensitive to changes in both mineral gradation and compaction method. Moreover, two homogeneity indices were proposed to evaluate the compaction uniformity of UAFC samples. Compared with the Marshall method,the SGC method is more conducive to improve the compaction uniformity of UAFC samples. The compaction method significantly influences the air void distribution characteristics and compaction uniformity of AC-5sample, but has a less significant impact on OGFC-5 sample. The experimental results in the study provides a solid foundation for further explorations on the internal structure and mixture design of UAFC.
文摘This paper argues that the present vocabulary teaching needs reorienting so as to achieve a more systematic and principled vocabulary teaching suitable for China's non-English majors. The author then tries to propose a new model of vocabulary teaching, which consists of explicit instruction, incidental learning and strategy training.