Detection of audio-to-image audio steganography based on peak frequency feature;

In order to detect the length of secret messages embedded by audio-to-image audio steganography, via researching distribution characteristic of wavelet coefficients’ histogram after audio-to-image transform the peak frequency feature which has linear relationship with the embedding capacity is extracted, and the linear regressive model is established.

Algorithm to design UWB pulse based on the peak frequency;

The correlation between broad-band spectral index and peak frequency for RBLs and FSRQs;

The correlation between broad-band spectral index and peak frequency for XBLs and FSRQs;

This paper is devoted to describe a kind of select-frequency amplifier of special use,analyse about its electronic phenomenons such as the multi-frequency peak value, amplitude disturbance, resonance disturbance, and provide a functional designs and data.

Reasonable choice of characteristic frequency in eddy current detection for pressure pipeline;

Calculation of characteristic frequency for inspection of pressure pipeline by spot probe;

The characteristic frequency of the elastic random medium models;

In addition, it explicated how to calculate the eigenfrequency based on a wavelet transform.