This pilot study examined the effectiveness and students’perceptions of a multimedia module on intermediate Chinese-as-a-Foreign-Language(CFL)learners’understanding and use of the“shì...de”construction.The mo...This pilot study examined the effectiveness and students’perceptions of a multimedia module on intermediate Chinese-as-a-Foreign-Language(CFL)learners’understanding and use of the“shì...de”construction.The module was designed based on the First Principles of Instruction(Morrill,2002)and the Cognitive Theory of Multimedia Learning(Mayer,2009;2014).It provided a systematic and comprehensive approach to teaching the“shì...de”construction,one of the most challenging grammar points in CFL.Twenty-two CFL learners participated in this mixed-methods study.Data were collected using pre-and post-tests,a survey,think-alouds,and semi-structured interviews.Findings show that after using the module,students’understanding and use of the construction significantly improved,except for their understanding of the second usage.The students enjoyed using the module and appreciated how it was designed,the way it was presented,and its availability.The reasons for the effectiveness of the module were analyzed and led to suggested improvements to the design of the module.The detailed description of the design process and the research result contribute to the knowledge of designing grammar teaching modules with multimedia for online,blended,and flipped learning.展开更多
Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user ...Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user data and operational data,this paper analyzes the maximum capacity of the multi-watermarking method for multimedia signal hiding as a means of alleviating the information security problem of B5G.The multiwatermarking process employs spread transform dither modulation.During the watermarking procedure,Gram-Schmidt orthogonalization is used to obtain the multiple spreading vectors.Consequently,multiple watermarks can be simultaneously embedded into the same position of a multimedia signal.Moreover,the multiple watermarks can be extracted without affecting one another during the extraction process.We analyze the effect of the size of the spreading vector on the unit maximum capacity,and consequently derive the theoretical relationship between the size of the spreading vector and the unit maximum capacity.A number of experiments are conducted to determine the optimal parameter values for maximum robustness on the premise of high capacity and good imperceptibility.展开更多
-Computer-Assisted-Instruction(CAI)is a modern instruction method whick uses computer as its media.Multimedia cardiac diaguostic CAI system inte-grates graph,text and sound into one body,provides the medical students ...-Computer-Assisted-Instruction(CAI)is a modern instruction method whick uses computer as its media.Multimedia cardiac diaguostic CAI system inte-grates graph,text and sound into one body,provides the medical students with large amount or medical cases.Teacher can input new knowledge and choose which item to teach.展开更多
文摘This pilot study examined the effectiveness and students’perceptions of a multimedia module on intermediate Chinese-as-a-Foreign-Language(CFL)learners’understanding and use of the“shì...de”construction.The module was designed based on the First Principles of Instruction(Morrill,2002)and the Cognitive Theory of Multimedia Learning(Mayer,2009;2014).It provided a systematic and comprehensive approach to teaching the“shì...de”construction,one of the most challenging grammar points in CFL.Twenty-two CFL learners participated in this mixed-methods study.Data were collected using pre-and post-tests,a survey,think-alouds,and semi-structured interviews.Findings show that after using the module,students’understanding and use of the construction significantly improved,except for their understanding of the second usage.The students enjoyed using the module and appreciated how it was designed,the way it was presented,and its availability.The reasons for the effectiveness of the module were analyzed and led to suggested improvements to the design of the module.The detailed description of the design process and the research result contribute to the knowledge of designing grammar teaching modules with multimedia for online,blended,and flipped learning.
基金funded by The National Natural Science Foundation of China under Grant(No.62273108,62306081)The Youth Project of Guangdong Artificial Intelligence and Digital Economy Laboratory(Guangzhou)(PZL2022KF0006)+3 种基金The National Key Research and Development Program of China(2022YFB3604502)Special Fund Project of GuangzhouScience and Technology Innovation Development(202201011307)Guangdong Province Industrial Internet Identity Analysis and Construction Guidance Fund Secondary Node Project(1746312)Special Projects in Key Fields of General Colleges and Universities in Guangdong Province(2021ZDZX1016).
文摘Beyond-5G(B5G)aims to meet the growing demands of mobile traffic and expand the communication space.Considering that intelligent applications to B5G wireless communications will involve security issues regarding user data and operational data,this paper analyzes the maximum capacity of the multi-watermarking method for multimedia signal hiding as a means of alleviating the information security problem of B5G.The multiwatermarking process employs spread transform dither modulation.During the watermarking procedure,Gram-Schmidt orthogonalization is used to obtain the multiple spreading vectors.Consequently,multiple watermarks can be simultaneously embedded into the same position of a multimedia signal.Moreover,the multiple watermarks can be extracted without affecting one another during the extraction process.We analyze the effect of the size of the spreading vector on the unit maximum capacity,and consequently derive the theoretical relationship between the size of the spreading vector and the unit maximum capacity.A number of experiments are conducted to determine the optimal parameter values for maximum robustness on the premise of high capacity and good imperceptibility.
文摘-Computer-Assisted-Instruction(CAI)is a modern instruction method whick uses computer as its media.Multimedia cardiac diaguostic CAI system inte-grates graph,text and sound into one body,provides the medical students with large amount or medical cases.Teacher can input new knowledge and choose which item to teach.
