Designed the car DVD/GPS integrated navigation system video used ARM11 processor, multi-task on the system structure and operation carried out under the research to orthogonality for software construction and design guideline, orthogonal software system are summarized design ideas and organizational structures and orthogonal software design benefits. It is useful to the practical application of DVD / GPS integrated navigation system software audio construction and design.
According to the requirements, the design principles of web-based learning platform were presented, taking into account teaching and learning. Many instances were introduced to the instructional design. Modular structure was applied to design the system whose model was proposed. The prototype was built by Adobe Flash Professional, a timeline-based, object-oriented authoring tool. User interactivity, loading multimedia files and switching full-screen were achieved by Scripting languages. The result shows that it is informative, user-friendly and suitable for browsing on Internet.
OFDM has a high peak to average power ratio ( PAPR ), when the signal PAPR over power amplifier ( HPA ) linear dynamic range, will introduce nonlinear distortion, affecting the signal transmission performance. In order to overcome the defects, OFDM need to adopt the corresponding PAPR suppression technique, the signal amplitude changes of power amplifiers in the allowable range. This paper presents a new partial transmit sequence algorithm ( PTS ), double phase sequence reversal threshold algorithm, and simulation results show that the new algorithm on the PAPR suppression effectiveness, search depth of T, the inhibition on PAPR performance.
This paper summarizes the development of electronic records management, and due to current defects and shortcomings, discusses the more effective and reasonable information security management program. For the system security issues, the paper has done an overall security analysis of system from the application layer, network layer, and database layer to physical and management levels, and has made a system’s security strategy.
In recent years, GSM communication network has developed rapidly, which has basically covered the whole country and has been improved the quality of network communication. The public communication network transmission is used GSM power equipment information, which is a power of new communication system and the distributed power equipment monitoring to achieve the new ideas. This article is based on the research and the practice, and it puts forward and develops the practical GSM network based on the master station software of distribution transformer monitoring. It is used to implement the data transmission between the serial port and the database. The module provides a common library interface to other programs that can be called directly. Distribution transformer monitoring is the main part of the master station software to develop and use the Power Builder. PowerBuilder native database is used the local relational database SQL Anywhere and the GSM distribution transformer monitoring system of the master station software is used the standard Windows interface style and modular design. The system can be used as an important part of power management, and the urban distribution network automation is also a useful addition to favorable scheduling and allocation of a reasonable load, which has the good social and economic benefit.
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