3results about How to "Have physical properties" patented technology

This invention relates to the field of environmental protection technology for coal-fired boilers, solving the problem of the difficulty in obtaining integrated, automated, and precise information on the characteristics of fly ash from coal-fired boilers. Specifically, it discloses a system and method for obtaining fly ash characteristics in coal-fired boilers, including a fly ash collection module, a fly ash pretreatment module, a characteristic detection module, a data processing module, and a control module. The fly ash collection module is connected to the flue of the coal-fired boiler; the fly ash pretreatment module is connected to the fly ash collection module; the characteristic detection module is connected to the fly ash pretreatment module; the data processing module is connected to both the characteristic detection module and the control module; and the control module is electrically connected to each of the three modules. The method of this invention includes S1, fly ash collection; S2, fly ash pretreatment; S3, characteristic detection; and S4, data processing and output. This invention is used for obtaining and detecting fly ash characteristics during combustion in coal-fired boilers, and features integration, automation, and high precision.

The invention discloses an anti-error robust image steganography method based on background-noise-free low-frequency embedding, and the method comprises the steps: carrying out the preprocessing and hybrid coding of an original secret image, and generating a final secret embedded stream; 5 / 3 integer wavelet transform is carried out on the carrier image to decompose the frequency domain, a first-level low-frequency sub-band is extracted, texture activity is calculated in a blocking mode, and an embedded mask is generated; modulating and setting a quantization step size and a jitter bias based on a quantization index, and adjusting a block mean value and superposing an offset based on a bit to be embedded to complete embedding; the method comprises the following steps: performing integer wavelet transform and block statistics on a received image, obtaining an initial bit stream by using a minimum distance method of quantization index modulation, and reconstructing and outputting a secret image through anti-interleaving, error correction decoding, inverse whitening and inverse scrambling processing. According to the method, the problems of poor safety and weak burst error resistance of traditional steganography are solved, the balance of robustness and concealment is realized, and the reliability of covert communication under a complex channel is improved.

This invention discloses an error-resistant robust image steganography method based on low-frequency embedding without background noise. The method includes: preprocessing and hybrid encoding the original secret image to generate a final secret embedding stream; performing a 5 / 3 integer wavelet transform on the carrier image to decompose the frequency domain, extracting the first-level low-frequency sub-band, calculating texture activity in blocks, and generating an embedding mask; setting the quantization step size and jitter bias based on quantization index modulation, adjusting the block mean based on the bits to be embedded, and superimposing the offset to complete the embedding; performing integer wavelet transform and block statistics on the received image, obtaining the initial bit stream using the minimum distance method of quantization index modulation, and reconstructing the output secret image through deinterleaving, error correction decoding, inverse whitening, and inverse scrambling. This invention solves the problems of poor security and weak resistance to burst errors in traditional steganography, achieving a balance between robustness and concealment, and improving the reliability of covert communication in complex channels.