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Gao W.,China Agricultural University | Wu H.,Chinese National Engineering Research Center for Information Technology in Agriculture | Zhang Q.,Beijing Electric Power Company | See S.,Asia Pacific Science and Technology Center | And 4 more authors.
Intelligent Automation and Soft Computing | Year: 2010

We derive a new way that maximizes and optimizes the agricultural information transferred in rural areas in China. The focus of this paper is to design an agricultural information transmission system based on C/S (Client/Server) model and smart display terminal. Smart display terminal, with General Packet Radio Service (GPRS) module attached, sends application requirement message and a server with expert system that supply precise agricultural information response to the requirement. To ensure the server capabilities to process a large association pressure from many clients' requests, an ideal model I/O Completion Port (IOCP) mechanism is applied that could buffer the clients' pressures. In this paper, we apply the mechanism to solve the server pressure problem successfully and reduce the association pressures from many clients. We also shows that the mechanism is able to promote the efficiency of agricultural information transmission and often the smart display terminal is human-machine interface (HMI) adapted to rural areas in China. Copyright © 2010, TSI ®; Press Printed in the USA. All rights reserved.


Liu Z.,China Agricultural University | Gao W.,China Agricultural University | Wang J.,China Agricultural University | Sun X.,Chinese National Engineering Research Center for Information Technology in Agriculture | And 4 more authors.
Intelligent Automation and Soft Computing | Year: 2010

Grid computing is a special kind of branch network computing which has important innovative ideas and great potential of development. It forms a large use of each other and co-operation high-performance computing network by interconnecting a number of computing resources, data resources of the wide area network as well as other equipments. Since grid system is heterogeneous and dynamic, and the different resource requires of the applications running on grid system, grid task scheduling is extremely complicated. Therefore, how to syncopate the task will directly affect the overall scheduling performance of the task in a grid system. In implementation process, different tasks need different resource, this article mainly aims at the demand of CPU and memory to establish a performance evaluation model. Through the evaluation results of CPU and memory, establish a rational task segmentation strategy to improve the quality of service, and realize grid load balancing, low communication complexity and high reliability between tasks, which achieve the purpose of minimizing the task execution time. Copyright © 2010, TSI - Press Printed in the USA. All rights reserved.


Gao W.,China Agricultural University | Zhang G.,China Agricultural University | See S.,Asia Pacific Science and Technology Center | See S.,Nanyang Technological University | And 2 more authors.
Intelligent Automation and Soft Computing | Year: 2010

This paper proposes a peer-to-peer application framework through comparing the advantages and disadvantages of currently popular peer-to-peer architectures toward building an agricultural information-sharing system based on P2P network technology. Under the framework, an agricultural information-sharing P2P system is constructed in order to adapt to rural areas that have not convenient communication ways in China. The system separates index server and content server for reducing logging, searching and transmitting pressure. Although both index server and content server are called supernode, they are not traditional supernodes and play different roles. It provides a useful way for agricultural information communication especially for large audio or video files transmission. Copyright © 2010, TSI® Press Printed in the USA. All rights reserved.


Cen G.,China Agricultural University | Dong Y.,China Agricultural University | Gao W.,China Agricultural University | Yu L.,China Agricultural University | And 5 more authors.
Mathematical and Computer Modelling | Year: 2010

This article uses lightweight J2EE tools based on B/S architecture to design an auto-generated paper management system. This system includes several modules, namely: user management, subject management, classification management, question entry, question management, paper generation, and paper management. The design process performs the analysis and composes the examination paper using an efficient algorithm with a high possibility of success. With this algorithm, the user needs to identify the subject, the question type and the difficulty level. From this input, the examination paper will be generated automatically. On the basis of a study of the JSP and Microsoft Word interface, we find that the system combines with Word very well. Therefore the editing of questions and answers is performed using Word and the final paper may be stored as ".doc" files. The system has characteristics such as easy operation, a good interface, good usability, high security, high stability, and reliability. Crown Copyright © 2009.


Jiang H.,China Agricultural University | Gao W.,China Agricultural University | See S.,Asia Pacific Science and Technology Center | See S.,Nanyang Technological University | And 3 more authors.
Mathematical and Computer Modelling | Year: 2010

This paper presents a new architecture of operating system kernel. The new architecture discussed is based on modularity concept and consideration of the shortcomings of traditional kernel, and the operating system kernel is divided into three independent modules - executing module, policy module and monitoring module. Policy module determines the policy of process scheduling separated from traditional kernel. Monitoring module is responsible for monitoring processes, handling system error and detecting of important data. These three modules work independently and communicate with each other by interrupts to ensure the safety of CPU time, important system data structures and user data. As a result, these three independent modules improve the expandability and simplify maintenance of the operating system kernel and enhance the robustness of the system. In this paper, techniques' implementation is given and important data structures are defined. Finally, potential problems of this architecture are also discussed. © 2009 Elsevier Ltd. All rights reserved.

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