Background Haptic feedback plays a crucial role in virtual reality(VR)interaction,helping to improve the precision of user operation and enhancing the immersion of the user experience.Instrumental haptic feedback in v...Background Haptic feedback plays a crucial role in virtual reality(VR)interaction,helping to improve the precision of user operation and enhancing the immersion of the user experience.Instrumental haptic feedback in virtual environments is primarily realized using grounded force or vibration feedback devices.However,improvements are required in terms of the active space and feedback realism.Methods We propose a lightweight and flexible haptic feedback glove that can haptically render objects in VR environments via kinesthetic and vibration feedback,thereby enabling users to enjoy a rich virtual piano-playing experience.The kinesthetic feedback of the glove relies on a cable-pulling mechanism that rotates the mechanism and pulls the two cables connected to it,thereby changing the amount of force generated to simulate the hardness or softness of the object.Vibration feedback is provided by small vibration motors embedded in the bottom of the fingertips of the glove.We designed a piano-playing scenario in the virtual environment and conducted user tests.The evaluation metrics were clarity,realism,enjoyment,and satisfaction.Results A total of 14 subjects participated in the test,and the results showed that our proposed glove scored significantly higher on the four evaluation metrics than the nofeedback and vibration feedback methods.Conclusions Our proposed glove significantly enhances the user experience when interacting with virtual objects.展开更多
English language teaching is facing a reformation with the emphasis of students-centered learning approach and communicative language learning. Classroom interaction becomes popular especially during teachers' ora...English language teaching is facing a reformation with the emphasis of students-centered learning approach and communicative language learning. Classroom interaction becomes popular especially during teachers' oral feedback. In order to involve more students to participate, interactive techniques are applied in the classroom such as elicitation and recasts. This essay will focus on the adoption of interactive techniques in teachers' oral feedback in terms of a specific grammar lesson and try to explore its impact on students' participation.展开更多
In this paper, we conduct research on the novel English education mode based on feedback learning and interactive teaching method. Business English, which is based on general English, from the angle of English languag...In this paper, we conduct research on the novel English education mode based on feedback learning and interactive teaching method. Business English, which is based on general English, from the angle of English language features of text represents connotation of business English vocabulary expressed more, word ambiguity phenomenon is relatively common, meaning and pragmatic choice depends on the context. Our research starts from the analysis of the novel education pattern with the feedback learning and interactive teaching integration. Our education mode will let the students and the teachers interact with others and encourage the better participation passion that is meaningful.展开更多
The wave-CISK (cumulus convection heating feedback), the air-sea interaction and the evaporation-wind feedback are together introduced into a simple theoretical model, in order to understand their effect on driving tr...The wave-CISK (cumulus convection heating feedback), the air-sea interaction and the evaporation-wind feedback are together introduced into a simple theoretical model, in order to understand their effect on driving tropical atmospheric intraseasonal oscillation (ISO). The results showed that among the introduced dynamical processes the wave-CISK plays a major role in reducing phase speed of the wave to be closer to the observed tropical ISO. While the evaporation-wind feedback plays a major role in unstabilizing the wave. The air-sea interaction has certain effect on slowing down the phase speed of the wave. Therefore, the wave-CISK and evaporation-wind feedback can be regarded as fundamental dynamical mechanism of the tropical ISO. This study also shows that since the effects of the evaporation-wind feedback and the air-sea interaction were introduced, the excited wave is zonally dispersive, which can dynamically explain the activity feature of the observed ISO in the tropical atmosphere very well.展开更多
With the increasing of the elderly population and the growing hearth care cost, the role of service robots in aiding the disabled and the elderly is becoming important. Many researchers in the world have paid much att...With the increasing of the elderly population and the growing hearth care cost, the role of service robots in aiding the disabled and the elderly is becoming important. Many researchers in the world have paid much attention to heaRthcare robots and rehabilitation robots. To get natural and harmonious communication between the user and a service robot, the information perception/feedback ability, and interaction ability for service robots become more important in many key issues.展开更多
Integrated electro-absorption-modulated distributed feedback laser diodes(EMLs)are attracting much interest in optical communications for the advantages of a compact structure,low power consumption,and high-speed modu...Integrated electro-absorption-modulated distributed feedback laser diodes(EMLs)are attracting much interest in optical communications for the advantages of a compact structure,low power consumption,and high-speed modulation.In integrated EML,the microwave interaction between the distributed feedback laser diode(DFB-LD)and the electro-absorption modulator(EAM)has a nonnegligible influence on the modulation performance,especially at the high-frequency region.In this paper,integrated EML was investigated as a three-port network with two electrical inputs and a single optical output,where the scattering matrix of the integrated device was theoretically deduced and experimentally measured.Based on the theoretical model and the measured data,the microwave equivalent circuit model of the integrated device was established,from which the microwave interaction between DFB-LD and EAM was successfully extracted.The results reveal that the microwave interaction within integrated EML contains both the electrical isolation and optical coupling.The electrical isolation is bidirectional while the optical coupling is directional,which aggravates the microwave interaction in the direction from DFB-LD to EAM.展开更多
Phenology shifts influence regional climate by altering energy,and water fluxes through biophysical processes.However,a quantitative understanding of the phenological control on vegetation’s biophysical feedbacks to ...Phenology shifts influence regional climate by altering energy,and water fluxes through biophysical processes.However,a quantitative understanding of the phenological control on vegetation’s biophysical feedbacks to re gional climate remains elusive.Using long-term remote sensing observations and Weather Research and Fore casting(WRF)model simulations,we investigated vegetation phenology changes from 2003 to 2020 and quan tified their biophysical controls on the regional climate in Northeast China.Our findings elucidated that earlier green-up contributed to a prolonged growing season in forests,while advanced green-up and delayed dormancy extended the growing season in croplands.This prolonged presence and increased maximum green cover in tensified climate-vegetation interactions,resulting in more significant surface cooling in croplands compared to forests.Surface cooling from forest phenology changes was prominent during May’s green-up(-0.53±0.07°C),while crop phenology changes induced cooling throughout the growing season,particularly in June(-0.47±0.15°C),July(-0.48±0.11°C),and September(-0.28±0.09°C).Furthermore,we unraveled the contributions of different biophysical pathways to temperature feedback using a two-resistance attribution model,with aero dynamic resistance emerging as the dominant factor.Crucially,our findings underscored that the land surface temperature(LST)sensitivity,exhibited substantially higher values in croplands rather than temperate forests.These strong sensitivities,coupled with the projected continuation of phenology shifts,portend further growing season cooling in croplands.These findings contribute to a more comprehensive understanding of the intricate feedback mechanisms between vegetation phenology and surface temperature,emphasizing the significance of vegetation phenology dynamics in shaping regional climate pattern and seasonality.展开更多
Classroom interaction involves many aspects,among which teacher's feedback is an important element.This paper aimes at studying teacher's feedback from the perspective of communication.It first discusses the d...Classroom interaction involves many aspects,among which teacher's feedback is an important element.This paper aimes at studying teacher's feedback from the perspective of communication.It first discusses the definition of teacher's feedback and analyses the functions of teacher's feedback in the classroom interaction and then explores some strategies for effective feedback based on communication theory.展开更多
To improve the accuracy and interactivity of soft tissue delormatlon simulation, a new plate spring model based on physics is proposed. The model is parameterized and thus can be adapted to simulate different organs. ...To improve the accuracy and interactivity of soft tissue delormatlon simulation, a new plate spring model based on physics is proposed. The model is parameterized and thus can be adapted to simulate different organs. Different soft tissues are modeled by changing the width, number of pieces, thickness, and length of a single plate spring. In this paper, the structural design, calcula- tion of soft tissue deformation and real-time feedback operations of our system are also introduced. To evaluate the feasibility of the system and validate the model, an experimental system of haptic in- teraction, in which users can use virtual hands to pull virtual brain tissues, is built using PHANTOM OMNI devices. Experimental results show that the proposed system is stable, accurate and promising for modeling instantaneous soft tissue deformation.展开更多
Indoor environmental quality(IEQ)significantly affects human health and wellbeing.Therefore,continuous IEQ monitoring and feedback is of great concern in both the industrial and academic communities.However,most exist...Indoor environmental quality(IEQ)significantly affects human health and wellbeing.Therefore,continuous IEQ monitoring and feedback is of great concern in both the industrial and academic communities.However,most existing studies only focus on developing sensors that cost-effectively promote IEQ measurement while ignoring interactions between the human side and IEQ monitoring.In this study,an intelligent IEQ monitoring and feedback system-the Intelligent Built Enviroment(IBEM)-is developed.Firstly,the IBEM hardware instrument integrates air temperature,relative humidity,CO_(2),particulate matter with an aerodynamic diameter no greater than _(2.5)μm(PM_(2.5)),and illuminance sensors within a small device.The accuracy of this integrated device was tested through a co-location experiment with reference sensors;the device exhibited a strong correlation with the reference sensors,with a slight deviation(R^(2)>0.97 and slopes between 1.01 and 1.05).Secondly,a wireless data transmission module,a cloud storage module,and graphical user interfaces(i.e.,a web platform and mobile interface)were built to establish a pathway for dataflow and interactive feedback with the occupants of the indoor environments.Thus,the IEQ parameters can be continuously monitored with a high spatiotemporal resolution,interactive feedback can be induced,and synchronous data collection on occupant satisfaction and objective environmental parameters can be realized.IBEM has been widely applied in 131 buildings in 18cities/areas in China,with 1188 sample locations.Among these applications,we report on the targeted IEQ diagnoses of two individual buildings and the exploration of relationships between subjective and objective IEQ data in detail here.This work demonstrates the great value of IBEM in both industrial and academic research.展开更多
Study results in the last decades show that amount and quality of physical exercises,then the active participation,and now the cognitive involvement of patient in rehabilitation training are crucial to enhance recover...Study results in the last decades show that amount and quality of physical exercises,then the active participation,and now the cognitive involvement of patient in rehabilitation training are crucial to enhance recovery outcome of motor dysfunction patients after stroke.Rehabilitation robots mainly have been developed along this direction to satisfy requirements of recovery therapy,or focused on one or more of the above three points.Therefore,rehabilitation robot based on neuro-machine interaction has been proposed for the paralyzed limb training of post-stroke patient,which utilizes motor related EEG,UCSDI(Ultrasound Current Source Density Imaging),EMG for the robot control and feeds back the multi-sensory interaction information such as visual,auditory,force,haptic sensation to the patient simultaneously.This neuro-controlled and perceptual rehabilitation robot will bring great benefits to post-stroke patients.In order to develop such a kind of rehabilitation robot,some key technologies,such as non-invasive precise measurement and decoding of neural signals,realistic sensation feedback,coordinated control for both the rehabilitation robot and the patient,need to be solved.In this paper,some fundamental problems in developing and optimizing such a kind of rehabilitation robot based on neuro-machine interaction are proposed and discussed.展开更多
Classroom questioning is one of the most important parts of teaching activities, and also the most frequently used method to carry on classroom interactions between teachers and students. English teaching process is t...Classroom questioning is one of the most important parts of teaching activities, and also the most frequently used method to carry on classroom interactions between teachers and students. English teaching process is the process of"asking"and"answering"between teachers and students. Teachers should not only pay attention to the artistry of questioning, but also attach great importance to the strategy of asking questions. Appropriate teachers' questions are conducive to cultivate students' divergent thinking, and encourage students to better master knowledge by thinking and discussing, thus contributing to classroom interactions move towards a climax.展开更多
Interaction in EFL （English as a foreign language） classrooms has received much attention in recent years However, little research exists that has investigated interaction in Chinese EFL classrooms. To bridge this g...Interaction in EFL （English as a foreign language） classrooms has received much attention in recent years However, little research exists that has investigated interaction in Chinese EFL classrooms. To bridge this gap, the current research investigates interaction in EFL classrooms in middle schools in China in terms of： （1） the amount of teacher talk and interaction; （2） the type of teacher questions and teacher feedbacks; and （3） the amount and forms of meaning negotiation. The data set include observation records and observation reports of 140 naturally occurring lessons in middle schools in China. The findings reveal that there is not much interaction in EFL lessons in middle schools in western areas of China, which is shown by class time dominated by TTT （teacher talking time）, teacher questions and feedbacks that do not encourage students＇ responses and very little negotiation of meaning Possible causes are analyzed, and implications of this research for EFL teaching in China, teacher development and further research are also discussed展开更多
Based on the research of teachers' feedback and politeness strategies, this study adopts the natural research method-classroom observation, and analyzes ten typical politeness strategies teachers widely use in giv...Based on the research of teachers' feedback and politeness strategies, this study adopts the natural research method-classroom observation, and analyzes ten typical politeness strategies teachers widely use in giving feedback to demonstrate how teachers improve the efficiency of classroom interaction by these strategies based on the collected data, aiming at giving inspiration to the use of teachers' politeness strategies to further improve English teaching and to develop students' competence in using English.展开更多
This paper demonstrates students’perspective of peer feedback on writing.The researcher based on the relevant litera⁃ture to find that peer feedback has a great effect on learning engagement,evaluation skill,and peer...This paper demonstrates students’perspective of peer feedback on writing.The researcher based on the relevant litera⁃ture to find that peer feedback has a great effect on learning engagement,evaluation skill,and peer interaction.However,there are still some doubts from teacher and student.Therefore,the researcher further reexamines this issue by conducting a pre-test,posttest with 36 students in Hong Kong,supplemented by interview data.The research findings suggest that numerous students notice the effectiveness of peer feedback whereas they are not familiar with the assessment process and technique.In this paper,the re⁃searcher will explore secondary students’perspective of peer feedback,and evaluate to what extent peer feedback can enhance their writing.Besides,there are some strategies for how to carry out peer feedback in writing class.展开更多
Shaping learner contributions(SLC)in teacher's verbal feedback as an essential aspect of classroom interactional com-petence(CIC)to encourage modified language output and negotiation for meaning has been considere...Shaping learner contributions(SLC)in teacher's verbal feedback as an essential aspect of classroom interactional com-petence(CIC)to encourage modified language output and negotiation for meaning has been considered as facilitative for SLA,yet less recognized.This study explores classroom discourse to understand teacher's talk in SLC from two Chinese EFL classrooms,aiming to provide suggestions for EFL classrooms to enhancelearning.By integrating the results fromclose analysis and IDLab,16 SLC feedback strategies have been elicited,such as scaffolding,extending wait-time,code-switching,etc.,most of which are con-sistent with previous studies except for a new discovery,termed as emphasizing knowledge,but it reveals thatthey are not always constructive with respect to CIC.Thus,this study contributes a significant role in helping teachers and teacher education adopt ef-fective teaching practices and in introducing the new thought of CIC into the Chinese EFL context.展开更多
基金Supported by the Natienal Natural Science Foundation of China(U23A20287).
文摘Background Haptic feedback plays a crucial role in virtual reality(VR)interaction,helping to improve the precision of user operation and enhancing the immersion of the user experience.Instrumental haptic feedback in virtual environments is primarily realized using grounded force or vibration feedback devices.However,improvements are required in terms of the active space and feedback realism.Methods We propose a lightweight and flexible haptic feedback glove that can haptically render objects in VR environments via kinesthetic and vibration feedback,thereby enabling users to enjoy a rich virtual piano-playing experience.The kinesthetic feedback of the glove relies on a cable-pulling mechanism that rotates the mechanism and pulls the two cables connected to it,thereby changing the amount of force generated to simulate the hardness or softness of the object.Vibration feedback is provided by small vibration motors embedded in the bottom of the fingertips of the glove.We designed a piano-playing scenario in the virtual environment and conducted user tests.The evaluation metrics were clarity,realism,enjoyment,and satisfaction.Results A total of 14 subjects participated in the test,and the results showed that our proposed glove scored significantly higher on the four evaluation metrics than the nofeedback and vibration feedback methods.Conclusions Our proposed glove significantly enhances the user experience when interacting with virtual objects.
文摘English language teaching is facing a reformation with the emphasis of students-centered learning approach and communicative language learning. Classroom interaction becomes popular especially during teachers' oral feedback. In order to involve more students to participate, interactive techniques are applied in the classroom such as elicitation and recasts. This essay will focus on the adoption of interactive techniques in teachers' oral feedback in terms of a specific grammar lesson and try to explore its impact on students' participation.
文摘In this paper, we conduct research on the novel English education mode based on feedback learning and interactive teaching method. Business English, which is based on general English, from the angle of English language features of text represents connotation of business English vocabulary expressed more, word ambiguity phenomenon is relatively common, meaning and pragmatic choice depends on the context. Our research starts from the analysis of the novel education pattern with the feedback learning and interactive teaching integration. Our education mode will let the students and the teachers interact with others and encourage the better participation passion that is meaningful.
基金This study is partly supported by National Key Programme for Developing Basic Sciences(G1998040903)
文摘The wave-CISK (cumulus convection heating feedback), the air-sea interaction and the evaporation-wind feedback are together introduced into a simple theoretical model, in order to understand their effect on driving tropical atmospheric intraseasonal oscillation (ISO). The results showed that among the introduced dynamical processes the wave-CISK plays a major role in reducing phase speed of the wave to be closer to the observed tropical ISO. While the evaporation-wind feedback plays a major role in unstabilizing the wave. The air-sea interaction has certain effect on slowing down the phase speed of the wave. Therefore, the wave-CISK and evaporation-wind feedback can be regarded as fundamental dynamical mechanism of the tropical ISO. This study also shows that since the effects of the evaporation-wind feedback and the air-sea interaction were introduced, the excited wave is zonally dispersive, which can dynamically explain the activity feature of the observed ISO in the tropical atmosphere very well.
文摘With the increasing of the elderly population and the growing hearth care cost, the role of service robots in aiding the disabled and the elderly is becoming important. Many researchers in the world have paid much attention to heaRthcare robots and rehabilitation robots. To get natural and harmonious communication between the user and a service robot, the information perception/feedback ability, and interaction ability for service robots become more important in many key issues.
基金This work was supported by the National Key Research and Development Program of China under Grant No.2018YFE0201900the National Natural Science Foundation of China under Grants No.61927821 and No.61875240the Joint Research Fund of Ministry of Education of China under Grant No.6141A02022436.
文摘Integrated electro-absorption-modulated distributed feedback laser diodes(EMLs)are attracting much interest in optical communications for the advantages of a compact structure,low power consumption,and high-speed modulation.In integrated EML,the microwave interaction between the distributed feedback laser diode(DFB-LD)and the electro-absorption modulator(EAM)has a nonnegligible influence on the modulation performance,especially at the high-frequency region.In this paper,integrated EML was investigated as a three-port network with two electrical inputs and a single optical output,where the scattering matrix of the integrated device was theoretically deduced and experimentally measured.Based on the theoretical model and the measured data,the microwave equivalent circuit model of the integrated device was established,from which the microwave interaction between DFB-LD and EAM was successfully extracted.The results reveal that the microwave interaction within integrated EML contains both the electrical isolation and optical coupling.The electrical isolation is bidirectional while the optical coupling is directional,which aggravates the microwave interaction in the direction from DFB-LD to EAM.
基金supported by the Strategic Pri-ority Research Program(A)of the Chinese Academy of Sciences(Grant No.XDA28080503)the National Natural Science Foundation of China(Grant No.42071025)+1 种基金the Youth Innovation Promotion Associa-tion of Chinese Academy of Sciences(Grant No.2023240)the Pacific Northwest National Laboratory which is operated for DOE by Battelle Memorial Institute under Contract DE-A06-76RLO 1830.
文摘Phenology shifts influence regional climate by altering energy,and water fluxes through biophysical processes.However,a quantitative understanding of the phenological control on vegetation’s biophysical feedbacks to re gional climate remains elusive.Using long-term remote sensing observations and Weather Research and Fore casting(WRF)model simulations,we investigated vegetation phenology changes from 2003 to 2020 and quan tified their biophysical controls on the regional climate in Northeast China.Our findings elucidated that earlier green-up contributed to a prolonged growing season in forests,while advanced green-up and delayed dormancy extended the growing season in croplands.This prolonged presence and increased maximum green cover in tensified climate-vegetation interactions,resulting in more significant surface cooling in croplands compared to forests.Surface cooling from forest phenology changes was prominent during May’s green-up(-0.53±0.07°C),while crop phenology changes induced cooling throughout the growing season,particularly in June(-0.47±0.15°C),July(-0.48±0.11°C),and September(-0.28±0.09°C).Furthermore,we unraveled the contributions of different biophysical pathways to temperature feedback using a two-resistance attribution model,with aero dynamic resistance emerging as the dominant factor.Crucially,our findings underscored that the land surface temperature(LST)sensitivity,exhibited substantially higher values in croplands rather than temperate forests.These strong sensitivities,coupled with the projected continuation of phenology shifts,portend further growing season cooling in croplands.These findings contribute to a more comprehensive understanding of the intricate feedback mechanisms between vegetation phenology and surface temperature,emphasizing the significance of vegetation phenology dynamics in shaping regional climate pattern and seasonality.
文摘Classroom interaction involves many aspects,among which teacher's feedback is an important element.This paper aimes at studying teacher's feedback from the perspective of communication.It first discusses the definition of teacher's feedback and analyses the functions of teacher's feedback in the classroom interaction and then explores some strategies for effective feedback based on communication theory.
基金Supported by the National High Technology Research and Development Programme of China(No.2013AA010803,2009AA01Z311,2009AA01Z314)the National Natural Science Foundation of China(No.61304205,61203316,61272379,61103086,41301037)+3 种基金the Natural Science Foundation of Jiangsu Province(BK20141002)the Open Funding Project of State Key Laboratory of Virtual Reality Technology and Systems,Beihang University,Jiangsu Ordinary University Science Research Project(No.13KJB120007)Innovation and Entrepreneurship Training Project of College Students(No.201410300153,201410300165)the Excellent Undergraduate Paper(design)Supporting Project of NUIST
文摘To improve the accuracy and interactivity of soft tissue delormatlon simulation, a new plate spring model based on physics is proposed. The model is parameterized and thus can be adapted to simulate different organs. Different soft tissues are modeled by changing the width, number of pieces, thickness, and length of a single plate spring. In this paper, the structural design, calcula- tion of soft tissue deformation and real-time feedback operations of our system are also introduced. To evaluate the feasibility of the system and validate the model, an experimental system of haptic in- teraction, in which users can use virtual hands to pull virtual brain tissues, is built using PHANTOM OMNI devices. Experimental results show that the proposed system is stable, accurate and promising for modeling instantaneous soft tissue deformation.
基金supported by the China National Key Research and Development(R&D)Program(2018YFE0106100)the National Science Foundation for Distinguished Young Scholars of China(51825802)+3 种基金the Innovative Research Groups of the National Natural Science Foundation of China(51521005)the Strategic Research and Consulting Project of Chinese Academy of Engineering(2021XY-3)the China Postdoctoral Science Foundation(2021M691789)Shuimu Tsinghua Scholar Program(2020SM001)。
文摘Indoor environmental quality(IEQ)significantly affects human health and wellbeing.Therefore,continuous IEQ monitoring and feedback is of great concern in both the industrial and academic communities.However,most existing studies only focus on developing sensors that cost-effectively promote IEQ measurement while ignoring interactions between the human side and IEQ monitoring.In this study,an intelligent IEQ monitoring and feedback system-the Intelligent Built Enviroment(IBEM)-is developed.Firstly,the IBEM hardware instrument integrates air temperature,relative humidity,CO_(2),particulate matter with an aerodynamic diameter no greater than _(2.5)μm(PM_(2.5)),and illuminance sensors within a small device.The accuracy of this integrated device was tested through a co-location experiment with reference sensors;the device exhibited a strong correlation with the reference sensors,with a slight deviation(R^(2)>0.97 and slopes between 1.01 and 1.05).Secondly,a wireless data transmission module,a cloud storage module,and graphical user interfaces(i.e.,a web platform and mobile interface)were built to establish a pathway for dataflow and interactive feedback with the occupants of the indoor environments.Thus,the IEQ parameters can be continuously monitored with a high spatiotemporal resolution,interactive feedback can be induced,and synchronous data collection on occupant satisfaction and objective environmental parameters can be realized.IBEM has been widely applied in 131 buildings in 18cities/areas in China,with 1188 sample locations.Among these applications,we report on the targeted IEQ diagnoses of two individual buildings and the exploration of relationships between subjective and objective IEQ data in detail here.This work demonstrates the great value of IBEM in both industrial and academic research.
基金supported by the National Natural Science Foundation of China ( Grant no. 61272379, 61325018)the Technique Support Project of Jiangsu Province ( Grantno. BE2014132)
文摘Study results in the last decades show that amount and quality of physical exercises,then the active participation,and now the cognitive involvement of patient in rehabilitation training are crucial to enhance recovery outcome of motor dysfunction patients after stroke.Rehabilitation robots mainly have been developed along this direction to satisfy requirements of recovery therapy,or focused on one or more of the above three points.Therefore,rehabilitation robot based on neuro-machine interaction has been proposed for the paralyzed limb training of post-stroke patient,which utilizes motor related EEG,UCSDI(Ultrasound Current Source Density Imaging),EMG for the robot control and feeds back the multi-sensory interaction information such as visual,auditory,force,haptic sensation to the patient simultaneously.This neuro-controlled and perceptual rehabilitation robot will bring great benefits to post-stroke patients.In order to develop such a kind of rehabilitation robot,some key technologies,such as non-invasive precise measurement and decoding of neural signals,realistic sensation feedback,coordinated control for both the rehabilitation robot and the patient,need to be solved.In this paper,some fundamental problems in developing and optimizing such a kind of rehabilitation robot based on neuro-machine interaction are proposed and discussed.
文摘Classroom questioning is one of the most important parts of teaching activities, and also the most frequently used method to carry on classroom interactions between teachers and students. English teaching process is the process of"asking"and"answering"between teachers and students. Teachers should not only pay attention to the artistry of questioning, but also attach great importance to the strategy of asking questions. Appropriate teachers' questions are conducive to cultivate students' divergent thinking, and encourage students to better master knowledge by thinking and discussing, thus contributing to classroom interactions move towards a climax.
文摘Interaction in EFL （English as a foreign language） classrooms has received much attention in recent years However, little research exists that has investigated interaction in Chinese EFL classrooms. To bridge this gap, the current research investigates interaction in EFL classrooms in middle schools in China in terms of： （1） the amount of teacher talk and interaction; （2） the type of teacher questions and teacher feedbacks; and （3） the amount and forms of meaning negotiation. The data set include observation records and observation reports of 140 naturally occurring lessons in middle schools in China. The findings reveal that there is not much interaction in EFL lessons in middle schools in western areas of China, which is shown by class time dominated by TTT （teacher talking time）, teacher questions and feedbacks that do not encourage students＇ responses and very little negotiation of meaning Possible causes are analyzed, and implications of this research for EFL teaching in China, teacher development and further research are also discussed
文摘Based on the research of teachers' feedback and politeness strategies, this study adopts the natural research method-classroom observation, and analyzes ten typical politeness strategies teachers widely use in giving feedback to demonstrate how teachers improve the efficiency of classroom interaction by these strategies based on the collected data, aiming at giving inspiration to the use of teachers' politeness strategies to further improve English teaching and to develop students' competence in using English.
文摘This paper demonstrates students’perspective of peer feedback on writing.The researcher based on the relevant litera⁃ture to find that peer feedback has a great effect on learning engagement,evaluation skill,and peer interaction.However,there are still some doubts from teacher and student.Therefore,the researcher further reexamines this issue by conducting a pre-test,posttest with 36 students in Hong Kong,supplemented by interview data.The research findings suggest that numerous students notice the effectiveness of peer feedback whereas they are not familiar with the assessment process and technique.In this paper,the re⁃searcher will explore secondary students’perspective of peer feedback,and evaluate to what extent peer feedback can enhance their writing.Besides,there are some strategies for how to carry out peer feedback in writing class.
文摘Shaping learner contributions(SLC)in teacher's verbal feedback as an essential aspect of classroom interactional com-petence(CIC)to encourage modified language output and negotiation for meaning has been considered as facilitative for SLA,yet less recognized.This study explores classroom discourse to understand teacher's talk in SLC from two Chinese EFL classrooms,aiming to provide suggestions for EFL classrooms to enhancelearning.By integrating the results fromclose analysis and IDLab,16 SLC feedback strategies have been elicited,such as scaffolding,extending wait-time,code-switching,etc.,most of which are con-sistent with previous studies except for a new discovery,termed as emphasizing knowledge,but it reveals thatthey are not always constructive with respect to CIC.Thus,this study contributes a significant role in helping teachers and teacher education adopt ef-fective teaching practices and in introducing the new thought of CIC into the Chinese EFL context.
