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This paper proposes a new application framework for group tour guiding services based on RFIDs and wireless sensor network. We consider a sensing field mixed with multiple independent tourist groups, each with a leader and several members. Members of a group will follow the moving path of their leader, but may occasionally roam around randomly based on(More)
The purpose of this paper is to analyze the feasibility of applying wavelet density estimation to ICA algorithm in theory. We propose a novel ICA algorithm based on wavelet density estimation in this paper. The density estimation of the separated signals is directly evaluated by truncated wavelet to approximate the arbitrary density function of sources so(More)
Equity-index volatility and variance swaps offer an efficient way for traders to take synthetic positions in pure volatility. General pricing method for volatility and variance swaps uses the replication method in Demeterfi, Derman, Kamal, and Zou (1999). In this thesis, we try to use the more direct and intuitive way to price volatility and variance swaps.(More)
The two-dimensional (2-D) harmonic retrieval method in multiplicative and additive noise based on 2-D chirp z-transform (CZT) is discussed in this paper. Unlike 2-D FFT, the 2-D CZT can improve the spectral resolution without increasing the size of the observation data and fine the spectra of 2-D harmonics in multiplicative and additive noise. Hence, the(More)
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