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This paper present a novel kind of voice camouflage algorithm based on wavelet transform. It embeds a secret voice into a digital audio signal in order to communicate secretly. The experimental… (More)
This paper present a watermark algorithm based on wavelet transform.A speech signature as the watermark is embedded in the audio signal adaptively. The original audio signal is not required for the… (More)
A secure communication scheme for true color image was proposed. It is aimed at the hiding problem of a huge amount of true-color image data in the covert communication and maintaining the good… (More)
This article researches and analyzes the characteristics of the MOS varactor based on software simulation.A method for estimating the VCO frequency precisely is presented according to the… (More)
This paper mainly introduces the application of engineering comprehensive technique in mine construction engineering, building construction engineering and other engineering.
Based on the traditional no source band-stop filter named double T and use feedback circuits,a 50Hz frequency trap filter whose Q values are adjustable is designed.The simulation experiment indicates… (More)
Objective To study the killing efficiency of 3000 MLD/g Type-C Botulinus neurotoxins particles to Ochotona curzoniae in winter in Qinghai province.Methods Ten plots were selected with each area of 1… (More)