A variety of barriers to listening comprehension are illustrated in this paper. They are analyzed respectively and several effective strategies are also presented afterward. The barriers to listening are those of psyc...A variety of barriers to listening comprehension are illustrated in this paper. They are analyzed respectively and several effective strategies are also presented afterward. The barriers to listening are those of psychological quality, language knowledge, cultural background, Chinese interference and so on. The strategies should be as follows: training students' psychological quality,strengthening the teaching and learning of language knowledge,comparing cultural differences, using student-centered teaching method and combining intensive listening and extensive listening.展开更多
In the rapidly evolving aerospace sector,the quest for sophisticated thermal barrier coating(TBC)materials has intensified.These materials are primarily sought for their superior comprehensive thermal characteristics,...In the rapidly evolving aerospace sector,the quest for sophisticated thermal barrier coating(TBC)materials has intensified.These materials are primarily sought for their superior comprehensive thermal characteristics,which include a low thermal conductivity coupled with a high coefficient of thermal expansion(CTE)that synergizes with the substrate.In our study,we adopt a solid-state method to synthesize a series of high-entropy rare-earth cerates:La_(2)Ce_(2)O_(7)(1RC),(La_(1/2)Nd_(1/2))2Ce_(2)O_(7)(2RC),(La_(1/3)Nd_(1/3)Sm_(1/3))_(2)Ce_(2)O_(7)(3RC),(La_(1/4)Nd_(1/4)Sm_(1/4)Eu_(1/4))_(2)Ce_(2)O_(7)(4RC),and(La_(1/5)Nd_(1/5)Sm_(1/5)Eu_(1/5)Gd_(1/5))_(2)Ce_(2)O_(7)(5RC),all sintered at 1,600℃ for 10 h.We thoroughly examine their phase structure,morphology,elemental distribution,and thermal properties.Our in-depth analysis of the phonon scattering mechanisms reveals that 4RC and 5RC exhibit exceptional thermal properties:high CTEs of 13.00×10^(−6) K^(−1) and 12.77×10^(−6) K^(−1) at 1,400℃,and low thermal conductivities of 1.55 W/(m·K)and 1.68 W/(m·K)at 1,000℃,respectively.Compared to other TBC systems,4RC and 5RC stand out for their excellent thermal characteristics.This study significantly contributes to the development of high-entropy oxides for TBC applications.展开更多
This article demonstrates a literature review of the strategy approach to listening comprehension. The article is to raise the awareness of listening strategy so as to further the research of ESL/EFL listening strateg...This article demonstrates a literature review of the strategy approach to listening comprehension. The article is to raise the awareness of listening strategy so as to further the research of ESL/EFL listening strategy and enhance the students' communicative competence.展开更多
The new published Chinese College English Curriculum Requirements gives priority to listening and speaking teaching. In the renewed version CET4&6,the portion of listening comprehension has increased largely from ...The new published Chinese College English Curriculum Requirements gives priority to listening and speaking teaching. In the renewed version CET4&6,the portion of listening comprehension has increased largely from 20% to 35% while almost every section of the testing items in the newly introduced Computer-based test requires a demanding listening capacity. Therefore,a reform in listening teaching is inevitable. This paper serves as a pilot research aiming at investigating the barriers among first year undergraduates and provides bene-ficial information for further research.展开更多
文摘A variety of barriers to listening comprehension are illustrated in this paper. They are analyzed respectively and several effective strategies are also presented afterward. The barriers to listening are those of psychological quality, language knowledge, cultural background, Chinese interference and so on. The strategies should be as follows: training students' psychological quality,strengthening the teaching and learning of language knowledge,comparing cultural differences, using student-centered teaching method and combining intensive listening and extensive listening.
基金This work was supported by the Instrument and equipment development,Chinese Academy of Sciences[YJKYYQ20210030]Shanghai Science and Technology Innovation Action Plan[21142201100].
文摘In the rapidly evolving aerospace sector,the quest for sophisticated thermal barrier coating(TBC)materials has intensified.These materials are primarily sought for their superior comprehensive thermal characteristics,which include a low thermal conductivity coupled with a high coefficient of thermal expansion(CTE)that synergizes with the substrate.In our study,we adopt a solid-state method to synthesize a series of high-entropy rare-earth cerates:La_(2)Ce_(2)O_(7)(1RC),(La_(1/2)Nd_(1/2))2Ce_(2)O_(7)(2RC),(La_(1/3)Nd_(1/3)Sm_(1/3))_(2)Ce_(2)O_(7)(3RC),(La_(1/4)Nd_(1/4)Sm_(1/4)Eu_(1/4))_(2)Ce_(2)O_(7)(4RC),and(La_(1/5)Nd_(1/5)Sm_(1/5)Eu_(1/5)Gd_(1/5))_(2)Ce_(2)O_(7)(5RC),all sintered at 1,600℃ for 10 h.We thoroughly examine their phase structure,morphology,elemental distribution,and thermal properties.Our in-depth analysis of the phonon scattering mechanisms reveals that 4RC and 5RC exhibit exceptional thermal properties:high CTEs of 13.00×10^(−6) K^(−1) and 12.77×10^(−6) K^(−1) at 1,400℃,and low thermal conductivities of 1.55 W/(m·K)and 1.68 W/(m·K)at 1,000℃,respectively.Compared to other TBC systems,4RC and 5RC stand out for their excellent thermal characteristics.This study significantly contributes to the development of high-entropy oxides for TBC applications.
文摘This article demonstrates a literature review of the strategy approach to listening comprehension. The article is to raise the awareness of listening strategy so as to further the research of ESL/EFL listening strategy and enhance the students' communicative competence.
文摘The new published Chinese College English Curriculum Requirements gives priority to listening and speaking teaching. In the renewed version CET4&6,the portion of listening comprehension has increased largely from 20% to 35% while almost every section of the testing items in the newly introduced Computer-based test requires a demanding listening capacity. Therefore,a reform in listening teaching is inevitable. This paper serves as a pilot research aiming at investigating the barriers among first year undergraduates and provides bene-ficial information for further research.
