Hongjian Dong

Research on the key issue of the process of the subjective items judging

There is an improved algorithm of the matching of prefix and suffix BM strings is proposed. The algorithm becomes more efficient by combining the prefix and the location information of the next character of the current window, trying more location movements with the existing information. Experiments show that this algorithm is better than BM algorithm. Furthermore, an algorithm of subjective items judging based on the BM is designed.

An Opportunistic Routing Protocol Based on Random Linear Network Coding in Wireless Sensor Networks

To efficiently exploit the broadcast feature of wireless channels, a opportunistic routing protocol based on random linear network coding is proposed for wireless sensor networks. The protocol requires each node except for destination in network to transmit the random linear combination created by all packets in buffer, and confirms the expected number of transmissions according to node’s credit value which is computed by a heuristic algorithm. This approach can overcome the shortcomings of instability of wireless channel quality, and use long and unreliable radio links which would not be used by traditional protocols. The experiment results show that the proposed protocol presents significant performance improvements, especially in network throughput and end-to-end delay.

Comparative study on wavelet transform and traditional image processing

Wavelet technology is applied to direct the traffic of Olympic Games to locate and identify various vehicles. License plate recognition algorithm is always on the basis of Fourier transform theory. However, when expressing signal through Fourier, all frequencies it contains can be determined but when they appear cannot be determined. Apply wavelet transform theory to the whole process of license plate recognition, and give a comparison between wavelet and Fourier transform after a deep research on the theory of wavelet for the further applications in solving the anti-jamming problems of license plate recognition.

The research of a new architecture in expert system

For the traditional expert system problems, combined with service-oriented architecture (SOA) and soft-bus idea, proposed a expert system design under a new architecture. And taking the medical expert system for example, clarify the advantages of the design, which has great significance for achieving the integration of expert system, interface standardization and system scalability.