Qiuchan Bai

Learn More
As semantic information is often missing in text representation, this paper proposes semantic graph structure to represent text and optimize graph structure by semantic similarity matrix. Then calculate the similarity of semantic graph structure by using the maximum common sub-graph of graph theory. Finally, K-means algorithm will be applied to expand(More)
—Feature extraction and location of eye are very important in face expression recognition, human-computer interaction, face detection and identification etc. This paper presents a new efficient method for eye location. Firstly, gradient, integral image, and Hough transform are used to obtain location and radius of the pupil. Secondly, CANNY operator and(More)
—In this paper, the error performance of multiuser CDMA system with space-time coding is studied in Rician fading channel, and the corresponding bit error rate (BER) and symbol error rate (SER) analysis are presented. Based on the performance analysis, a simple and effective multiuser receiver scheme is developed. The scheme has linear decoding complexity(More)
  • 1