Papers by Keyword: Operating System

Abstract: Cloud computing is a model about the increase , usage and delivery of related services in Internet, usually provides dynamically scalable and often virtualized resources by the Internet. This paper first introduces the cloud computing technology, then discusses the system structure, system flow and system function, and finally expounds the cloud computing role and the realization of the examination system .

Abstract: The university library is the information center of higher education literature, but also an important information base of all sectors of the community. This paper is based on the practical situation that there are few users in the university library during summer vocation, explored and analyzed the problems such as during the vocation, opening university library to the outside world and its impact, finally arrived at the conclusion that " resource sharing " is a good model for the social operation on university libraries during vocations, opening to the outside world is a big trend for the future operation mode of university library.

Abstract: One kind of processors with coprocessor is widely used in control areas. Traditional single-core operating system (OS) cant support the coprocessor. In order to take full advantage of the performance of the processor, we presented a real-time operating system framework named AutoOSEK-CP on the basis of AutoOSEK, which is a single-core operating system based on AutoSAR OS, to support dual-core processor. In this architecture, alarm management, interrupt processing and inter-core communication mechanism were moved in coprocessor module, and the master processor was responsible for the other functions of OS. Finally, we designed a prototype of AutoOSEK-CP to test the performance in HCS12XEP100. The results showed that the real-time performance and the time-tick accuracy were improved significantly compared with AutoOSEK.

Abstract: With the rapid development of the Internet, the remote control technology was demanded more. In this paper, we designed a simple and practical remote intelligent control system, using CGI technology to complete the construction of Web servers and embedding uCOSII as the real-time operating system in Cortex-M3 core processor. By porting TCP/IP protocol stack, users could login in the server to access and control the system via the Internet. Using NRF2401 wireless technology to build a terminal network, the terminal carried out intelligent control with field data collected by sensors. Meanwhile, users could make monitor and control on a control terminal via a Web browser on a PC or mobile. The remote intelligent control system was stable, real-time, low cost, fit for the smart home, industrial remote monitor and so on, so it would have a better application prospects.

Abstract: Many researches use diff environmental conditions or application requirements in WSN. In the default Deluge mechanism, it will recover a sensor node from an updating error by reloading the stored full image again or waiting for the host machine to retransmit the full image again. This strategy is easy to implement and intuitive, but replacing the current executing image by retransmitting a full image file again is resource-consuming. To avoid retransmitting the full image when performing recovery, at the time when diff-based updating procedures have been finished, sensor nodes using our recovery mechanisms will backup the received patch files (i.e. diff script) in flash memory. Our mechanisms would effectively utilize flash memory space to store several backup patch files. When recovery is needed, our mechanismswould incrementally recover a failed node by patching up the system with each of the backup patch files. In the design of our recovery mechanisms, the failed sensor node will first try its best to recover itself without the assistance of the host machine, in order to avoid affecting the operations of other normal nodes when performing recovery procedures. Thus, compared with the full image replacement strategy, our mechanisms can save many computing resources.

Abstract: In this paper we describe a model of a classic operating system kernel. We start out with an overview of the main components of the kernel and then present an exact definition of each of these components.

Abstract: The realization of interoperability between Linux and Windows is beneficial to the development of operating system technology in depth and breadth. From such aspects as architecture, kernel module, user module,system call,device driver module and so on, this paper elaborates a design scheme of operating system to run Windows' application programs on Linux platform.

Abstract: As the fastest growing operating system, Linux is applied in broader areas, and more and more people start to use Linux operating system. In allusion to the hot issues like Linux and UnixLinux and free softwares, Linux kernelLinux DistroLinux and embedded systemLinux and WindowsLinux teaching, the research results have been summarized in the article.

Abstract: Smart primary equipment as typical components and structure basis of intelligent substation. Intelligent components which is the core component of smart primary equipment, will be the access platform of various smart unit, and smart unit will be the applied terminal of specific intelligence technology. This paper designed a general intelligent component platform, the module structure and configuration program of the intelligence components are given. Meanwhile, the use of The real-time operating systems was used to to manage the cooperative work of intelligence unit, so as to meet the various requirements of the general intelligent equipment. Finally, the real-time validation of the smart component platform was carried out by the GOOSE message. The results meet the requirements of IEC61850 standard and provide a reference for the further research and development of intelligent components.

Abstract: The design of the steering system is a very important part of the vehicle design, the steering system have a direct impact to the vehicle's handling and stability, the steering portability as well as the driver's work intensity and efficiency. The paper introduced the composition and characteristics of the vehicle's steering system. Analysis of the basic requirements and key technologies of the vehicle's steering. According to the applications and the advantages and disadvantages of the existing two-wheel steering system, advance a concept of four-wheel steering system, analysis of the structure of the four-wheel steering technology and the problems to be solved. In addition,studied the application situation of the power steering system in the vehicle steering mechanism from mechanical mechanics.