In the Engine CAD application system engineering database management system (ECAD-EDBMS) is the kernel. ECAD-EDBMS can manage and process the multimedia such as graphics, data, text, sound, image and video. It provide...In the Engine CAD application system engineering database management system (ECAD-EDBMS) is the kernel. ECAD-EDBMS can manage and process the multimedia such as graphics, data, text, sound, image and video. It provides the integrated environment and more functions for many subsystems of ECAD and engine designers. So it improves the design efficiency.展开更多
Media Commerce is now becoming a new trend which results fr om faster development of network bandwidth and high availability of multimedia t echnologies, how to protect media content from being used in a right-violat...Media Commerce is now becoming a new trend which results fr om faster development of network bandwidth and high availability of multimedia t echnologies, how to protect media content from being used in a right-violated w ay is one of most important issues to take into account. In this paper, a novel and efficient authorization and authentication Digital Rights Management (DRM) s chema is proposed firstly for secure multimedia delivery, then based on the sche ma, a real-time digital signature algorithm built on Elliptic Curve Cryptograph y (ECC) is adopted for fast authentication and verification of licensing managem ent, thus secure multimedia delivery via TCP/RTP can efficiently work with real -time transaction response and high Quality of Service (QoS) . Performance eval uations manifest the proposed schema is secure, available for real-time media s tream authentication and authorization without much effected of QoS. The propose d schema is not only available for Client/Server media service but can be easily extended to P2P and broadcasting network for trusted rights management.展开更多
Under the new situation, the information management has gradually become the focus of the school management. With the increase of the students in schools, the burden of the student management becomes heavier. To this ...Under the new situation, the information management has gradually become the focus of the school management. With the increase of the students in schools, the burden of the student management becomes heavier. To this end, strengthening the design and research of the school management system and improving the efficiency of the student management have become the focus of the school development. At present, with the development of the big data technology, the management of college students also needs the corresponding changes. Based on the student management, this paper analyzes the current situation and the existing problems of the student information management, and expounds the principles and effective ways of developing the student management information construction, which can effectively promote the modernization of the student management.展开更多
It is the ultimate goal of our country's colleges and universities to carry out teaching work by continuously sending high-quality professionals for the national and social construction. Colleges and universities ...It is the ultimate goal of our country's colleges and universities to carry out teaching work by continuously sending high-quality professionals for the national and social construction. Colleges and universities play an indispensable and important role in promoting the stable operation and progressive development of our society. Therefore, colleges and universities should adapt to the development of the times and reform and innovate their own teaching management under the current multimedia environment in order to improve the efficiency and quality of college teaching management. This paper first expounds the importance of the reform and innovation of university teaching management under the multimedia environment, and analyzes the current development situation of university teaching management under the multimedia environment. Finally, it puts forward some targeted innovation paths of university teaching management reform.展开更多
This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and t...This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and the home network registration, in which the visited network registration is responsible for re-registration in IMS. When subscriber roams, the location information of home network will be updated by the visited network based on the change of user equipment （UE）＇ s IP address. Thereibre the TTLM can reduce the times of IMS registration signaling. Using the proposed analytical model, the performance of the CR and the proposed TTLM were investigated. After the performance analysis of CR and TTLM by using proposed analytical model, the cost of CR in IMS could significantly be reduced theoretically and also was proven by simulation experiments.展开更多
A novel bandwidth allocation strategy and a connection admission control technique arc proposed to improve the utilization of network resource and provide the network with better quality of service （QoS） guarantees ...A novel bandwidth allocation strategy and a connection admission control technique arc proposed to improve the utilization of network resource and provide the network with better quality of service （QoS） guarantees in multimedia low earth orbit （LEO） satellite networks. Our connection admission control scheme, we call the probability based dynamic channel reservation strategy （PDR）, dynamically reserves bandwidth for real-time services based on their handoff probability. And the reserved bandwidth for real-time handoff connection can also be used by new connections under a certain probability determined by the mobility characteristics and bandwidth usage of the system. Simulation results show that our scheme not only lowers the call dropping probability （CDP） for Class I real-time service but also maintains the call blocking probability （CBP） to certain degree. Consequently, the scheme can offer very low CDP for rcal-time connections while keeping resource utilization high.展开更多
Multimedia content delivery to capable smart phones with high-speed next-generation Internet connectivity is becoming commonplace. However, the openness of delivery demands adaptive and robust management of intellectu...Multimedia content delivery to capable smart phones with high-speed next-generation Internet connectivity is becoming commonplace. However, the openness of delivery demands adaptive and robust management of intellectual property rights. The purpose of this article is to describe a framework to address the central issues in content delivery: a scalable peer-to-peer-based content delivery model. Our method pairs the delivery with a secure access control model that enables data providers to secure a return from making their original content available. Our work resulted in a prototype implementation written in Java that includes a client for the Android mobile platform. Adding robust trust management to scalable peer-to-peer content delivery is the major significance of our work.展开更多
Elaborated the multimedia technologies in the teaching characteristic, definitely multimedia technical superiority at the same time, the union managed by the people university have used the question which in the multi...Elaborated the multimedia technologies in the teaching characteristic, definitely multimedia technical superiority at the same time, the union managed by the people university have used the question which in the multimedia technologies appears to propose some improvement method as well as in the multimedia technologies the question which should pay attention in the teaching. Proposed in the modem education media, the teacher reasonably chooses and utilizes the science teaching process through the teaching design which multimedia technical and the traditional teaching method organic synthesis forms, all played to the curriculum and the teaching method reform the positive role. The science uses the multimedia technologies, may avoid the multimedia technologies in classroom instruction application some erroneous zones, the realization teaching effect optimization.展开更多
动力锂电池组的电源管理系统是延长电池循环寿命、维护电动汽车安全运行的关键。为延长电池的使用寿命,该文针对纯电动汽车,设计了一种以飞思卡尔单片机和电池管理芯片为核心的锂电池管理系统。实现对锂离子单体电池电压、电流等的检测...动力锂电池组的电源管理系统是延长电池循环寿命、维护电动汽车安全运行的关键。为延长电池的使用寿命,该文针对纯电动汽车,设计了一种以飞思卡尔单片机和电池管理芯片为核心的锂电池管理系统。实现对锂离子单体电池电压、电流等的检测及显示,对电池组充放电进行监控和保护,实现电池组的均衡及总电压、总电流、温度的检测,利用控制器局域网络CAN(controller area network)总线对其进行通讯设计。最后通过系统调试、精度试验和均衡试验等进行系统功能验证,证明了电池管理系统的有效性。该研究可为纯电动汽车电池管理系统设计与应用提供参考。展开更多
文摘In the Engine CAD application system engineering database management system (ECAD-EDBMS) is the kernel. ECAD-EDBMS can manage and process the multimedia such as graphics, data, text, sound, image and video. It provides the integrated environment and more functions for many subsystems of ECAD and engine designers. So it improves the design efficiency.
文摘Media Commerce is now becoming a new trend which results fr om faster development of network bandwidth and high availability of multimedia t echnologies, how to protect media content from being used in a right-violated w ay is one of most important issues to take into account. In this paper, a novel and efficient authorization and authentication Digital Rights Management (DRM) s chema is proposed firstly for secure multimedia delivery, then based on the sche ma, a real-time digital signature algorithm built on Elliptic Curve Cryptograph y (ECC) is adopted for fast authentication and verification of licensing managem ent, thus secure multimedia delivery via TCP/RTP can efficiently work with real -time transaction response and high Quality of Service (QoS) . Performance eval uations manifest the proposed schema is secure, available for real-time media s tream authentication and authorization without much effected of QoS. The propose d schema is not only available for Client/Server media service but can be easily extended to P2P and broadcasting network for trusted rights management.
文摘Under the new situation, the information management has gradually become the focus of the school management. With the increase of the students in schools, the burden of the student management becomes heavier. To this end, strengthening the design and research of the school management system and improving the efficiency of the student management have become the focus of the school development. At present, with the development of the big data technology, the management of college students also needs the corresponding changes. Based on the student management, this paper analyzes the current situation and the existing problems of the student information management, and expounds the principles and effective ways of developing the student management information construction, which can effectively promote the modernization of the student management.
文摘It is the ultimate goal of our country's colleges and universities to carry out teaching work by continuously sending high-quality professionals for the national and social construction. Colleges and universities play an indispensable and important role in promoting the stable operation and progressive development of our society. Therefore, colleges and universities should adapt to the development of the times and reform and innovate their own teaching management under the current multimedia environment in order to improve the efficiency and quality of college teaching management. This paper first expounds the importance of the reform and innovation of university teaching management under the multimedia environment, and analyzes the current development situation of university teaching management under the multimedia environment. Finally, it puts forward some targeted innovation paths of university teaching management reform.
基金Supported by National Science Fund for Distinguished Young Scholars (No. 60525110 )National Basic Research Program of China (No.2007CB307100, 2007CB307103)+1 种基金Program for New Century Excellent Talents in University (No. NCET-04-0111 )Development Fund Project for Electronic and Information Industry (Mobile Service and Application System Based on 3G)
文摘This paper proposed a two-tier location management mechanism （TTLM） by improving the current registration mechanism （CR） in IP Multimedia Subsystem （IMS）. The TTLM includes the visited network registration and the home network registration, in which the visited network registration is responsible for re-registration in IMS. When subscriber roams, the location information of home network will be updated by the visited network based on the change of user equipment （UE）＇ s IP address. Thereibre the TTLM can reduce the times of IMS registration signaling. Using the proposed analytical model, the performance of the CR and the proposed TTLM were investigated. After the performance analysis of CR and TTLM by using proposed analytical model, the cost of CR in IMS could significantly be reduced theoretically and also was proven by simulation experiments.
基金Supported by the National Natural Science Foundation of China (No. 60496313)
文摘A novel bandwidth allocation strategy and a connection admission control technique arc proposed to improve the utilization of network resource and provide the network with better quality of service （QoS） guarantees in multimedia low earth orbit （LEO） satellite networks. Our connection admission control scheme, we call the probability based dynamic channel reservation strategy （PDR）, dynamically reserves bandwidth for real-time services based on their handoff probability. And the reserved bandwidth for real-time handoff connection can also be used by new connections under a certain probability determined by the mobility characteristics and bandwidth usage of the system. Simulation results show that our scheme not only lowers the call dropping probability （CDP） for Class I real-time service but also maintains the call blocking probability （CBP） to certain degree. Consequently, the scheme can offer very low CDP for rcal-time connections while keeping resource utilization high.
文摘Multimedia content delivery to capable smart phones with high-speed next-generation Internet connectivity is becoming commonplace. However, the openness of delivery demands adaptive and robust management of intellectual property rights. The purpose of this article is to describe a framework to address the central issues in content delivery: a scalable peer-to-peer-based content delivery model. Our method pairs the delivery with a secure access control model that enables data providers to secure a return from making their original content available. Our work resulted in a prototype implementation written in Java that includes a client for the Android mobile platform. Adding robust trust management to scalable peer-to-peer content delivery is the major significance of our work.
文摘Elaborated the multimedia technologies in the teaching characteristic, definitely multimedia technical superiority at the same time, the union managed by the people university have used the question which in the multimedia technologies appears to propose some improvement method as well as in the multimedia technologies the question which should pay attention in the teaching. Proposed in the modem education media, the teacher reasonably chooses and utilizes the science teaching process through the teaching design which multimedia technical and the traditional teaching method organic synthesis forms, all played to the curriculum and the teaching method reform the positive role. The science uses the multimedia technologies, may avoid the multimedia technologies in classroom instruction application some erroneous zones, the realization teaching effect optimization.
文摘动力锂电池组的电源管理系统是延长电池循环寿命、维护电动汽车安全运行的关键。为延长电池的使用寿命,该文针对纯电动汽车,设计了一种以飞思卡尔单片机和电池管理芯片为核心的锂电池管理系统。实现对锂离子单体电池电压、电流等的检测及显示,对电池组充放电进行监控和保护,实现电池组的均衡及总电压、总电流、温度的检测,利用控制器局域网络CAN(controller area network)总线对其进行通讯设计。最后通过系统调试、精度试验和均衡试验等进行系统功能验证,证明了电池管理系统的有效性。该研究可为纯电动汽车电池管理系统设计与应用提供参考。
