Satellites with altitudes below 400 km are called super low altitude satellites(SLAS),often used to achieve responsive imaging tasks.Therefore,it is important for the manipulation of its ground track.Aiming at the pro...Satellites with altitudes below 400 km are called super low altitude satellites(SLAS),often used to achieve responsive imaging tasks.Therefore,it is important for the manipulation of its ground track.Aiming at the problem of ground track manipulation of SLAS,a control method based on tangential impulse thrust is proposed.First,the equation of the longitude difference between SLAS and the target point on the target latitude is derived based on Gauss’s variational equations.On this basis,the influence of the tangential impulse thrust on the ground track’s longitude is derived.Finally,the method for ground track manipulation of SLAS under the tangential impulse thrust is proposed.The simulation results verify the effective-ness of the method,after manipulation,the satellite can visit the target point and revisit it for multiple days.展开更多
The relationship between language and culture is the core issue in intercultural communication.For native language learners,their native language and local culture are in perfect harmony;while for foreign language lea...The relationship between language and culture is the core issue in intercultural communication.For native language learners,their native language and local culture are in perfect harmony;while for foreign language learners,they often unconsciously separate the two,resulting in the phenomenon of“half-cooked rice”in foreign language education.This phenomenon makes us reflect on the purpose,content,and methods of foreign language education and seek theoretical guidance.Foreign language teaching aims to improve intercultural competencies,so it must face language and culture in intercultural communication.As a branch of cultural linguistics with multidisciplinary origins,intercultural linguistics focuses on the relationship between language and culture in intercultural communication.In the process of exploring how to apply linguistic theories in second language acquisition,it shows that intercultural linguistics not only has important enlightenment and application value,but also needs further studies.展开更多
纠正性反馈作为二语习得研究的关键议题,其有效性在于教师能否精准提供反馈以助力学生二语习得。基于多维度分类框架,纠正性反馈细化为隐性与显性两大类型,各自蕴含独特的运作机制与效果特征。文章首先介绍了纠正性反馈的定义与分类,然...纠正性反馈作为二语习得研究的关键议题,其有效性在于教师能否精准提供反馈以助力学生二语习得。基于多维度分类框架,纠正性反馈细化为隐性与显性两大类型,各自蕴含独特的运作机制与效果特征。文章首先介绍了纠正性反馈的定义与分类,然后回顾了隐性和显性纠正性反馈研究的现状,并基于此展望了未来研究路径,以期通过教学策略的优化,实现二语学习成效质的飞跃。Corrective feedback, as a key issue in second language acquisition research, hinges on the teacher’s ability to provide precise feedback to facilitate students’ second language acquisition. Based on a multidimensional classification framework, corrective feedback is refined into two major types: explicit and implicit, each containing unique operational mechanisms and effect characteristics. This paper first introduces the definition and classification of corrective feedback, subsequently reviews the current status of research on implicit and explicit corrective feedback, and finally forecasts future research avenues, aiming to achieve a qualitative leap in second language learning outcomes through the optimization of teaching strategies.展开更多
In the realm of psychology and language acquisition,the exploration of“individual differences”-encompassing attributes such as personality traits,motivation,and language aptitude-has long been a focal point of schol...In the realm of psychology and language acquisition,the exploration of“individual differences”-encompassing attributes such as personality traits,motivation,and language aptitude-has long been a focal point of scholarly investigation.Within this sphere,the book“Researching Creativity in Second Language Acquisition”by Ashleigh Pipes offers a fresh perspective on the role of creativity as a significant individual difference in Second Language Acquisition(SLA).Positioned against the backdrop of extensive empirical research on individual differences,this book stands out by focusing on the often overlooked aspect of creativity,which Pipes argues,holds paramount importance in SLA.展开更多
本文以2009-2019年二语言习得(SLA)知识领域为研究对象,由于二语习得知识领域的快速发展和多元化研究,本文选择近10年的二语习得研究文献和采用一种新兴的数据分析工具CiteSpace对二语习得知识领域进行文献综述,利用Web of Science数据...本文以2009-2019年二语言习得(SLA)知识领域为研究对象,由于二语习得知识领域的快速发展和多元化研究,本文选择近10年的二语习得研究文献和采用一种新兴的数据分析工具CiteSpace对二语习得知识领域进行文献综述,利用Web of Science数据库主题检索了2009-2019年二语习得相关的4660条文献。研究发现二语习得的影响因素和统计模型是研究的重要方面,且研究主题集中在心理学、神经科学、语言学和语言教学等框架。此外,二语习得研究内容也日趋多样化,近年来认知科学的实证研究逐渐占据主导地位。同时本文对二语习得知识领域的可视化研究显示在未来一定时间内跨学科研究可能会吸引更多学者的眼球。展开更多
基金supported by the National Natural Science Foundation of China(11972130)the Heilongjiang Touyan Team Program(11972130).
文摘Satellites with altitudes below 400 km are called super low altitude satellites(SLAS),often used to achieve responsive imaging tasks.Therefore,it is important for the manipulation of its ground track.Aiming at the problem of ground track manipulation of SLAS,a control method based on tangential impulse thrust is proposed.First,the equation of the longitude difference between SLAS and the target point on the target latitude is derived based on Gauss’s variational equations.On this basis,the influence of the tangential impulse thrust on the ground track’s longitude is derived.Finally,the method for ground track manipulation of SLAS under the tangential impulse thrust is proposed.The simulation results verify the effective-ness of the method,after manipulation,the satellite can visit the target point and revisit it for multiple days.
文摘The relationship between language and culture is the core issue in intercultural communication.For native language learners,their native language and local culture are in perfect harmony;while for foreign language learners,they often unconsciously separate the two,resulting in the phenomenon of“half-cooked rice”in foreign language education.This phenomenon makes us reflect on the purpose,content,and methods of foreign language education and seek theoretical guidance.Foreign language teaching aims to improve intercultural competencies,so it must face language and culture in intercultural communication.As a branch of cultural linguistics with multidisciplinary origins,intercultural linguistics focuses on the relationship between language and culture in intercultural communication.In the process of exploring how to apply linguistic theories in second language acquisition,it shows that intercultural linguistics not only has important enlightenment and application value,but also needs further studies.
文摘纠正性反馈作为二语习得研究的关键议题,其有效性在于教师能否精准提供反馈以助力学生二语习得。基于多维度分类框架,纠正性反馈细化为隐性与显性两大类型,各自蕴含独特的运作机制与效果特征。文章首先介绍了纠正性反馈的定义与分类,然后回顾了隐性和显性纠正性反馈研究的现状,并基于此展望了未来研究路径,以期通过教学策略的优化,实现二语学习成效质的飞跃。Corrective feedback, as a key issue in second language acquisition research, hinges on the teacher’s ability to provide precise feedback to facilitate students’ second language acquisition. Based on a multidimensional classification framework, corrective feedback is refined into two major types: explicit and implicit, each containing unique operational mechanisms and effect characteristics. This paper first introduces the definition and classification of corrective feedback, subsequently reviews the current status of research on implicit and explicit corrective feedback, and finally forecasts future research avenues, aiming to achieve a qualitative leap in second language learning outcomes through the optimization of teaching strategies.
文摘In the realm of psychology and language acquisition,the exploration of“individual differences”-encompassing attributes such as personality traits,motivation,and language aptitude-has long been a focal point of scholarly investigation.Within this sphere,the book“Researching Creativity in Second Language Acquisition”by Ashleigh Pipes offers a fresh perspective on the role of creativity as a significant individual difference in Second Language Acquisition(SLA).Positioned against the backdrop of extensive empirical research on individual differences,this book stands out by focusing on the often overlooked aspect of creativity,which Pipes argues,holds paramount importance in SLA.
文摘本文以2009-2019年二语言习得(SLA)知识领域为研究对象,由于二语习得知识领域的快速发展和多元化研究,本文选择近10年的二语习得研究文献和采用一种新兴的数据分析工具CiteSpace对二语习得知识领域进行文献综述,利用Web of Science数据库主题检索了2009-2019年二语习得相关的4660条文献。研究发现二语习得的影响因素和统计模型是研究的重要方面,且研究主题集中在心理学、神经科学、语言学和语言教学等框架。此外,二语习得研究内容也日趋多样化,近年来认知科学的实证研究逐渐占据主导地位。同时本文对二语习得知识领域的可视化研究显示在未来一定时间内跨学科研究可能会吸引更多学者的眼球。
