Utilizing the self-learning and self-adaptive capabilities of CPN and with adaptively changing the length of segment,the relationship between the important characters of audio signals and embedded watermark was learned by using the variance of low frequency wavelet coefficients with strong stability as the input of CPN,to achieve the purpose of embedding watermark.

The integration of two feature descriptors, wavelet-coefficient standard deviation of the approximation sub-image and M-band wavelet histogram, and their corresponding distance similarity measure functions are used to realize progressive retrieval of target texture image databases.

A low-frequency square-wave DC/AC inverter and its control strategy;

Investigation of single-stage soft-switched DC/AC converter with low-frequency square-wave output;

Summaries were made to the advantages and disadvantages and application of electronic ballast circuit topologies working in low-frequency square-wave.

The wavelet variance under the single scale is discussed,and in combining the information entropy in information theory with physical sense,the wavelet entropy under the multi-scale is introduced in this paper.

According to the properties of bias drift of optic gyro, the wavelet transform is used to study the wavelet variance of random process.

A long memory analysis method based on wavelet variance for time series was proposed.