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
Event-related potentials(ERPs)are a non-invasive neuro-electrophysiological technique that offers high resolution,real-time continuous measurements,as well as multidimensional probing capabilities,of the temple area o...Event-related potentials(ERPs)are a non-invasive neuro-electrophysiological technique that offers high resolution,real-time continuous measurements,as well as multidimensional probing capabilities,of the temple area of the head.These features enable precise,real-time brain activity measurements,making ERPs a preferred tool for linguistic researchers over the past five decades.This paper reviews the ERP applications and their significance in Second Language Acquisition(SLA)research.By analyzing the cognitive changes in the bilingual language processing mechanisms and language switching processes during SLA,this paper aims to demonstrate how ERPs provide in-depth insights into the cognitive mechanisms of SLA.In addition,this paper explores the prospects for ERP applications and the directions for their technological advancement in China.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
针对传统云媒体资源分配算法中没有考虑整体服务满意度和分配效用等因素对算法性能的影响,导致云媒体资源分配服务效率和可应用性不高的问题,引入云媒体服务提供者和云媒体服务请求者的效用函数模型,从服务价格、服务响应时间和服务带宽...针对传统云媒体资源分配算法中没有考虑整体服务满意度和分配效用等因素对算法性能的影响,导致云媒体资源分配服务效率和可应用性不高的问题,引入云媒体服务提供者和云媒体服务请求者的效用函数模型,从服务价格、服务响应时间和服务带宽3个方面对该模型进行统一化描述。利用云媒体服务双方的效用函数值和让步策略,得到最大效用化的云媒体服务资源,并进行协商分配。基于协商机制效用模型,提出了资源分配算法RAANM(Resource allocation algorithm based on negotiation mechanism)。与传统调度算法相比,RAANM算法的云媒体资源分配的目标函数不再是最小化响应时间,而是最大化效用值,进而提高服务满意度。最后通过仿真实例验证了该算法的有效性。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.
基金funded by the“ERP Study on Vocabulary Translation of Second Language Learners”(Project No.:SCWYGJ22-1)of the Sichuan Foreign Language Literature Research Center.
文摘Event-related potentials(ERPs)are a non-invasive neuro-electrophysiological technique that offers high resolution,real-time continuous measurements,as well as multidimensional probing capabilities,of the temple area of the head.These features enable precise,real-time brain activity measurements,making ERPs a preferred tool for linguistic researchers over the past five decades.This paper reviews the ERP applications and their significance in Second Language Acquisition(SLA)research.By analyzing the cognitive changes in the bilingual language processing mechanisms and language switching processes during SLA,this paper aims to demonstrate how ERPs provide in-depth insights into the cognitive mechanisms of SLA.In addition,this paper explores the prospects for ERP applications and the directions for their technological advancement in China.
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.
文摘针对传统云媒体资源分配算法中没有考虑整体服务满意度和分配效用等因素对算法性能的影响,导致云媒体资源分配服务效率和可应用性不高的问题,引入云媒体服务提供者和云媒体服务请求者的效用函数模型,从服务价格、服务响应时间和服务带宽3个方面对该模型进行统一化描述。利用云媒体服务双方的效用函数值和让步策略,得到最大效用化的云媒体服务资源,并进行协商分配。基于协商机制效用模型,提出了资源分配算法RAANM(Resource allocation algorithm based on negotiation mechanism)。与传统调度算法相比,RAANM算法的云媒体资源分配的目标函数不再是最小化响应时间,而是最大化效用值,进而提高服务满意度。最后通过仿真实例验证了该算法的有效性。
