Shaozi Li

Research on P2P Hybrid Information Retrieval Based on Ant Colony Algorithm

Peer-to-peer (P2P) architectures make each network node capable of being both a client and a server. Such a network is potentially powerful for developing large-scale distributed information sharing. This paper presents our recent research work on the P2P hybrid information retrieval based on ant colony algorithm (ACA). From various perspectives, our work focuses on how to improve retrieval efficiency in a P2P file-sharing network. A new model is proposed to implement P2P information retrieval. In order to evaluate and validate the model, we built a simulated P2P application consist of a network of peer nodes; mobile agent travel through the network, making peer nodes communicate with each other. The results show some advantages of the proposed approach for the P2P retrieval based on ant colony algorithm using information recommendation services

An improved shifting bottleneck algorithm for job shop scheduling problem

The shifting bottleneck procedures are mainly based on one-machine scheduling algorithm, so the results of one-machine scheduling algorithm significantly affect the performance of the shifting bottleneck procedures. In this paper, inspired by two facts that the function of the release time and the delivery time of each job is uniform, an efficient algorithm for one-machine scheduling problem is presented. Based on this algorithm, an improved shifting bottleneck procedure is developed. The simulation results to the well-known benchmark problems show that the performance of the improved procedure can compete with that of the shifting bottleneck procedure and the modified ones.

A new migration algorithm of mobile agent based on ant colony algorithm in p2p network

This paper presents our recent research work on Peer to Peer distributed information sharing based on mobile agent. From various perspectives, our work focuses on how to improve information retrieval efficiency in a P2P distributed information sharing system. A new model based on mobile agent is proposed and the new migration algorithm of mobile agent based on ant colony algorithm (ACA) is presented to implement P2P information retrieval. In order to evaluate and validate the model, we built a simulated P2P prototype consisting of a network of peer nodes; mobile agent migrating in the network, making peer nodes communication with each other. The results show some advantages of the proposed approach for the P2P distributed information sharing based on mobile agent.

Cooperative work in multimedia network teaching system

This paper presents the basic architecture of CSCW (computer supported cooperative work). Then some issues of CSCW systems such as concurrency control and synchronization are discussed. Lastly, its application in a multimedia network teaching system such as a whiteboard, chatting system, etc. is given.

A VoIP Client System Framework and its Implementation

This paper describes the design of the whole framework of a VoIP Client System. In this design, we use the design idea of automaton to build the entire dialing and hang up processes, use multithread to implement event synchronous mechanism. Then we use a strategy to couple the Jitter-Buffer design with the automatic adjustment of the redundant packets. This strategy gets a good trade-off at the client between the methods of solving delay and those of solving dithering. The experiment result indicates that this framework keeps good QoS performance even in bad network conditions.

A Cooperative Authoring System for Teaching Chinese as a Foreign Language

Shortage of a collaborative and automated platform has put textbook authoring for teaching Chinese as a foreign language into trouble. Furthermore, for lots of published textbooks, there are lots of defects which make them unacceptable. In this paper, a novel system based on computer supported cooperative work (CSCW) was developed to solve these problems. In order to improve the speed and accuracy of automatic phonetic notation, a method that combines string matching with statistics based on hidden Markov model was proposed, and a method of cross-text search and computing is adopted to control the amount and recurrence rate of new words. To get suitable examples for words, an algorithm for corpus indexing and retrieval is presented. Result indicates that textbooks authored on this system are scientific

Design and implementation of a cooperative editing system based on natural language processing

As collaborative editing systems are becoming more and more prevalent, new requirements on collaboration are raised by users. This paper presents a novel editing system based on natural language processing, which has been used in Chinese language teaching. The proposed approach has addressed a number of problems existed in textbook editing, e.g., in order to improve the speed and accuracy of automatic phonetic notation, a method of Chinese text segmentation has been proposed; corpus retrieval is applied in the system for selection of suitable sample sentences for new words; also, in order to control the amount and recurrence rate of new words, a method of cross-text search and computing is adopted. The feedback of users has indicated that the system indeed reduces the time spent in editing collaboration.

Research on general adaptive management mechanism of active network

This paper studies a general QoS adaptive management mechanism in view of video server and active node. For the video server, we put forward an idea of video period task set as well as defining some video services with this set. This paper also designs a kind of mixed real time task scheduling arithmetic which taking QoS critical level as a character of task priority vector to build video period task set and accomplish dynamic resource management, based on QoS conveniently. Therefore, it realizes the service quality control of small granularity. Based on it, the paper further puts forward active node adaptive QoS control component. Through designing dynamic resource trading active queue and using mixed priority of video active packet, the new idea not only makes system support video application as much as possible, but also enables it to satisfy resource trading requirements of user. At last, a simulation experiment is carried out to illustrate the advantage of active queues after amelioration.

IP multicasting technique and its application on multimedia network teaching system

This paper presents the basic principles of IP multicasting. The design and application in a multimedia network teaching system are then given.