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As the foundational component of web information acquisition, web crawler has been always the research hotspot in academia and industry, recently the parallel web crawler is the main research direction. In view of the shortage of the center-like dynamic assignment and distributed static assignment which are adopted by current parallel web crawler, this paper presents a parallel web crawler based on...
The paper first introduces the theories and principles of the interaction design on the E-Learning courses; then analyzes the interaction design of the "College English Intensive Reading" as well as their technology implementation; finally, sums up the above interaction design and implementation of the experience, as well as suggestions for further improvement.
Tele-care system has been regarded as one of important industry in the future. This study tends to integrate many functions in long-distance care system through the Web services. For instance, integrating wireless measuring instruments and information systems helps patients in hospitals or at home to have access to complete care. When patients rest at home or do activities outside, measuring instruments...
To avoid the network congestion and let the end hosts share the link resources fairly, F. P. Kelly proposed classic Kelly model based on an optimal theory. This model can deduce algorithm which has proportional fairness equilibrium point and has asymptotically stability. However, the primal algorithm of Kelly model leads to the packet accumulation in the queue of the bottle link. By using heuristic...
To solve the network congestion problem, F.P. Kelly proposed proportional fair and classic Kelly model which can converge to proportional fair point with asymptotic stability. Based on it, many new flow control mechanisms were derived to improve its performance. However, Most of their convergence rates are linear since in classic Kelly model, link price is only positive. This paper presents an enhanced...
To get the global fairness in Internet, the Classic Kelly Model proposed by F.P.Kelly uses the utility function to optimize the data fluid control. The model gives two algorithms to control the data send rate. One is prime algorithm, and the other is dual algorithm. The two algorithms can converge to proportional global fair point. However, the two algorithms use only the positive price to feedback...
Telemedicine system has become as a major research topic due to the increase of aging population and chronic diseases. Patients usually transfer their test results to the hospitals or doctors through telemedicine system. The purpose of this report is to combine the current medical equipments and services with and the most recent network technology. Through telemedicine system, patients will have more...
We explore the process of transmitting real-time Internet video frames over TCP (Transmission Control Protocol) and discover that the delay of waiting in TCP sender-buffer is the critical factor that causes large end-to-end delay. We propose a multi-buffer scheduling model for decreasing the end-to-end delay by scheduling video frames among application-layer sender-buffer, TCP sender-buffer, TCP receiver-buffer...
To provide the reliable connectivity between two endpoints over the Internet, a firewall cluster for stateful high availability removes the single-point failure by replicating and maintaining TCP connection states to a backup firewall node, at the expense of the costs of network and system resources. In this paper, through trace-based simulations on a prototype implementation, we evaluate the overheads...
e-Learning engineering courses with online experiments are attracting a great deal of attention because of the flexibility they provide in both teaching and learning. This paper has described an Internet-based teaching and experiment system for control engineering (ITESCE) that provides students with online course material, a simulator, an online control experiment using an arm robot, and the ability...
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