In this paper,we study cross-layer scheduling scheme on multimedia application which considers both streaming traffic and data traffic over cognitive ad hoc networks.A cross-layer design is proposed to optimize SU'...In this paper,we study cross-layer scheduling scheme on multimedia application which considers both streaming traffic and data traffic over cognitive ad hoc networks.A cross-layer design is proposed to optimize SU's utility,which is used as an approach to balance the transmission efficiency and heterogeneous traffic in cognitive ad hoc networks.A framework is provided for utility-based optimal subcarrier assignment,power allocation strategy and corresponding modulation scheme,subject to the interference threshold to primary user(PU) and total transmit power constraint.Bayesian learning is adopted in subcarrier allocation strategy to avoid collision and alleviate the burden of information exchange on limited common control channel(CCC).In addition,the M/G/l queuing model is also introduced to analyze the expected delay of streaming traffic.Numerical results are given to demonstrate that the proposed scheme significantly reduces the blocking probability and outperforms the mentioned single-channel dynamic resource scheduling by almost 8%in term of system utility.展开更多
ZTE Corporation,a leading global provider of telecommunications equipment and network solutions,announced on June 6,2007 that it has signed a strategic cooperation agreement with Polkomtel S.A.,one of the top three mo...ZTE Corporation,a leading global provider of telecommunications equipment and network solutions,announced on June 6,2007 that it has signed a strategic cooperation agreement with Polkomtel S.A.,one of the top three mobile telephony operators in Poland.展开更多
In todays information technology explosion society;The use of multimedia information technology for modern education has become an inevitable trend of educational reform. Multimedia teaching is characterized by its un...In todays information technology explosion society;The use of multimedia information technology for modern education has become an inevitable trend of educational reform. Multimedia teaching is characterized by its unique image and scientificity. To exert its charm in primary school Chinese teaching;It has promoted the enrichment of Chinese teaching forms, the optimization of teaching process and the general improvement of teaching quality. So as to inject new vigor and vitality into Chinese teaching in primary schools.展开更多
Ireproving the quality and experience perceived by the user is fundamental when de- veloping multimedia technologies, products, and services. Quality of experience （QoE） involves subjective perception, user behavior...Ireproving the quality and experience perceived by the user is fundamental when de- veloping multimedia technologies, products, and services. Quality of experience （QoE） involves subjective perception, user behavior and needs, appropriateness, con- text, and usability of delivered content. Modeling QoE is critical for enhancing QoE in various nmhimedia applications. In this special issue,展开更多
With the use of multimedia which combines the use o f text, sound, images, motion video and animation, it is more efficient for studen ts to learn mould design interactively. A program is created using several multi m...With the use of multimedia which combines the use o f text, sound, images, motion video and animation, it is more efficient for studen ts to learn mould design interactively. A program is created using several multi media software to simulate the mechanism of moulding processes in order to let s tudents understand the concept of mould design. In addition, students can even access the program through the Internet. Therefore, the software is defined as Multimedia and Internet Technology (MIT) program. The MIT program consists of four sections: (i) simulation of mould mechanisms, ( ii) cooling system, (iii) material information and (iv) games for tutorials. Sec tion One covers the basic operations of different types of moulds such as two-p late mould, three-plate mould, split mould, side-core mould and mould with und ercuts. Section Two introduces different types of cooling systems such as bubble r, baffle, cooling circuits, etc. Section Three provides some useful material in formation for mould design. Section Four contains games of matching mould compon ents, mould design problem finding and multiple choice questions to test student s how much they understand mould design concept. Multimedia is highly effective particularly in teaching and learning. It changes the nature of learning itself. It makes reading dynamic by giving words an impo rtant new dimension. It allows students to see, hear and do simultaneously, thus significantly reducing average learning time. Furthermore, through cooperative learning on Internet, students can access the program, share data or search info rmation anytime anywhere. Therefore, Multimedia and Internet Technology is one o f the vital aspects to speed up the realization of information age in society.展开更多
Multimedia technology can provide new design ideas for primary school English classroom teaching. The purpose of this study is to clarify the important role of multimedia teaching in primary school English classroom, ...Multimedia technology can provide new design ideas for primary school English classroom teaching. The purpose of this study is to clarify the important role of multimedia teaching in primary school English classroom, and explore the specific application of multimedia in primary school English classroom, improve the quality and efficiency of primary school English teaching and promote students' active participation in learning activities.展开更多
Composition teaching is an important part of Chinese teaching in middle schools and an important part of Chinese teaching. The students writing level is an important symbol to measure the quality of Chinese teaching. ...Composition teaching is an important part of Chinese teaching in middle schools and an important part of Chinese teaching. The students writing level is an important symbol to measure the quality of Chinese teaching. However, the quality of many students compositions is hardly satisfactory to our teachers. Composition has become a major difficulty for students to learn Chinese and a major difficulty for teachers to teach Chinese. After years of teaching practice, I found that only by stimulating students interest in learning can the quality of students learning be improved. Then, how to stimulate students interest in composition class, I think we should clarify the practical value of composition, so that students can make clear the purpose of composition. On this basis, stimulate students to discover "heart" life and write down their true feelings about "heart" life.展开更多
基金This work was supported by the National Natural Science Foundations of China （Grant No. 61201143）, the Fundamental Research Fund for the Central Universities （Grant No. HIT. NSRIF. 2010091）, the National Science Foundation for Post-doctoral Scientists of China （Grant No. 2012M510956）, and the Post-doc- toral Fund of Heilongjiang Province （GrantNo. LBHZ11128）.
文摘In this paper,we study cross-layer scheduling scheme on multimedia application which considers both streaming traffic and data traffic over cognitive ad hoc networks.A cross-layer design is proposed to optimize SU's utility,which is used as an approach to balance the transmission efficiency and heterogeneous traffic in cognitive ad hoc networks.A framework is provided for utility-based optimal subcarrier assignment,power allocation strategy and corresponding modulation scheme,subject to the interference threshold to primary user(PU) and total transmit power constraint.Bayesian learning is adopted in subcarrier allocation strategy to avoid collision and alleviate the burden of information exchange on limited common control channel(CCC).In addition,the M/G/l queuing model is also introduced to analyze the expected delay of streaming traffic.Numerical results are given to demonstrate that the proposed scheme significantly reduces the blocking probability and outperforms the mentioned single-channel dynamic resource scheduling by almost 8%in term of system utility.
文摘ZTE Corporation,a leading global provider of telecommunications equipment and network solutions,announced on June 6,2007 that it has signed a strategic cooperation agreement with Polkomtel S.A.,one of the top three mobile telephony operators in Poland.
文摘In todays information technology explosion society;The use of multimedia information technology for modern education has become an inevitable trend of educational reform. Multimedia teaching is characterized by its unique image and scientificity. To exert its charm in primary school Chinese teaching;It has promoted the enrichment of Chinese teaching forms, the optimization of teaching process and the general improvement of teaching quality. So as to inject new vigor and vitality into Chinese teaching in primary schools.
文摘Ireproving the quality and experience perceived by the user is fundamental when de- veloping multimedia technologies, products, and services. Quality of experience （QoE） involves subjective perception, user behavior and needs, appropriateness, con- text, and usability of delivered content. Modeling QoE is critical for enhancing QoE in various nmhimedia applications. In this special issue,
文摘With the use of multimedia which combines the use o f text, sound, images, motion video and animation, it is more efficient for studen ts to learn mould design interactively. A program is created using several multi media software to simulate the mechanism of moulding processes in order to let s tudents understand the concept of mould design. In addition, students can even access the program through the Internet. Therefore, the software is defined as Multimedia and Internet Technology (MIT) program. The MIT program consists of four sections: (i) simulation of mould mechanisms, ( ii) cooling system, (iii) material information and (iv) games for tutorials. Sec tion One covers the basic operations of different types of moulds such as two-p late mould, three-plate mould, split mould, side-core mould and mould with und ercuts. Section Two introduces different types of cooling systems such as bubble r, baffle, cooling circuits, etc. Section Three provides some useful material in formation for mould design. Section Four contains games of matching mould compon ents, mould design problem finding and multiple choice questions to test student s how much they understand mould design concept. Multimedia is highly effective particularly in teaching and learning. It changes the nature of learning itself. It makes reading dynamic by giving words an impo rtant new dimension. It allows students to see, hear and do simultaneously, thus significantly reducing average learning time. Furthermore, through cooperative learning on Internet, students can access the program, share data or search info rmation anytime anywhere. Therefore, Multimedia and Internet Technology is one o f the vital aspects to speed up the realization of information age in society.
文摘Multimedia technology can provide new design ideas for primary school English classroom teaching. The purpose of this study is to clarify the important role of multimedia teaching in primary school English classroom, and explore the specific application of multimedia in primary school English classroom, improve the quality and efficiency of primary school English teaching and promote students' active participation in learning activities.
文摘Composition teaching is an important part of Chinese teaching in middle schools and an important part of Chinese teaching. The students writing level is an important symbol to measure the quality of Chinese teaching. However, the quality of many students compositions is hardly satisfactory to our teachers. Composition has become a major difficulty for students to learn Chinese and a major difficulty for teachers to teach Chinese. After years of teaching practice, I found that only by stimulating students interest in learning can the quality of students learning be improved. Then, how to stimulate students interest in composition class, I think we should clarify the practical value of composition, so that students can make clear the purpose of composition. On this basis, stimulate students to discover "heart" life and write down their true feelings about "heart" life.
