151results about How to "High embedding efficiency" patented technology

The invention provides an information hiding and extracting method based on integer DCT (Discrete Cosine Transformation) coefficient modulation. An N-dimensional 2N+1-order magic cube matrix is constructed, carrier coefficients are respectively mapped in the N-dimensional 2N+1-order magic cube matrix by taking N carrier coefficients as a group, so as to obtain a mapping value, a value of to-be-embedded 2N+1 system number secret information is compared with the mapping value, if the two values are equal, the group of the carrier coefficients do not need to be modified, if the two values are not equal, only one carrier coefficient needs to be modified, so that the mapping value is equal to the to-be-embedded value, one carrier coefficient is modified, so that the embedding of formula bits of the secret information is completed, the embedding efficiency reaches up to formula, and the modification rate of the carrier coefficient is only 1/N, so that a computing process is simple, and the information hiding and extracting efficiency is improved.

The invention relates to a video steganographic method based on macro block partition mode disturbance. The method includes an embedment process of secrete information and an extraction process of the secrete information. Two hidden channels are built in the embedment process of the secrete information, the secret information is embedded through different steganographic codes, and the secrete information is extracted from the two hidden channels sequentially in the extraction process of the secret information. Preferably, the two hidden channels are built through the steganographic codes including a Syndrome Trellis Code and a Wet Paper Code, and embedment and extraction of the secret information are carried out. Various steganographic codes are used comprehensively to carry out video steganography, high embedment efficiency is achieved, attack of an existing video steganographic analysis method can be resisted effectively, and the video steganographic method is especially suitable for high-safety hidden communication; different macro block division mode disturbance costs can be made according to different application scenes, and high flexibility is achieved.

A battery capable of improving the cycle characteristics even if the thickness of an anode active material layer is increased is provided. The battery includes a cathode, an anode and an electrolytic solution. The anode has an anode active material layer on an anode current collector, and the anode active material layer contains a carbon material and has a thickness of 30 mum or more. The electrolytic solution contains a solvent and an electrolyte salt, and the solvent contains at least one of sulfone compounds such as a cyclic disulfonic acid anhydride.

The invention discloses a high-fidelity H.264/AVC video three-coefficient reversible steganography method which comprises two parts of an embedding method and an extraction method. The embedding method comprises the steps of: according to an H.264/AVC video standard, carrying out coding operation on a YUV video sequence frame by frame to obtain quantized residual DCT coefficients of all macro blocks in a current coded frame; sequentially traversing a plurality of macro blocks in the current coded frame according to a sequence from top to bottom and from left to right, and selecting 4*4TU sub-blocks of which texture-complexity is greater than or equal to a set threshold; and according to a three-coefficient embedding strategy, completing embedding, and carrying out entropy coding to obtaina compressed video after embedding. According to the invention, a three-coefficient modulation strategy combines information of a vacuum value, a coefficient translation path and the like, the quantized residual DCT coefficients which do not need to be modified are filtered out, useless modification of a carrier is reduced, embedding efficiency of an algorithm is improved, and video quality and algorithm safety are ensured.

The invention discloses a socket-and-spigot joint structure of a prefabricated pier column and a bearing platform adopting high-strength steel fiber reinforced concrete caulking and a construction method. The invention is characterized in that a socket groove is reserved in the position, corresponding to a pier column, of the top of the bearing platform, a prefabricated pier column is hoisted andinserted into a socket groove, high-strength steel fiber reinforced concrete caulking is poured into a gap between the periphery of the pier column and the wall of the socket groove, and firm connection is achieved. The connecting structure of the pier column and the bearing platform is simple, high in embedding and fixing efficiency, convenient to install and operate, relatively low in prefabricating and embedding precision control requirement, high in construction efficiency and safe and reliable in stress, and meanwhile the anti-seismic property of the connecting structure is similar to that of a cast-in-place structure.

The invention relates to a method of conducting wall breaking and deodorization to spirulina through conjointly applying a lysozyme-protease dual-enzyme wall-breaking enzymolysis method and a beta-cyclodextrin masking method. The spirulina is rich and complete in nutrition content, while has heavier odor which not only influences the flavor of the spirulina products, but also influences the processing and utilization of the spirulina, the treatment on the odor of the spirulina ordinarily comprises the wall breaking and deodorization steps, the operation is complicated and time-wasting, and the inappropriate deodorization conditions can cause the loss of the nutritional content. The invention provides a high-efficiency deodorization and low-nutritional content loss method of conducting wall breaking and deodorization to spirulina. The method is simple and convenient to operate and time-saving, and comprises the steps: conducting lysozyme-protease dual-enzyme wall-breaking to the spirulina, and partially hydrolyzing macromolecular odor proteins; and masking the odor substances with beta-cyclodextrin. The spirulina wall breaking and deodorization operation processes are simple, convenient and time-saving, the obtained deodorized spirulina basically has no odor, and the vast majority of nutritional content in the spirulina can be retained.

The invention discloses a fluorescent nanometer particle with a composite-type silicon shell structure and a preparation method thereof. The shell composition of the fluorescent nanometer particle is silicon dioxide; and the fluorescent kernel is nanometer gold particle of which the surface is combined with rhodamine dye. The method for preparing the fluorescent nanometer particle comprises the following steps: the surface of the nanometer gold particle is wrapped with fluorescent dye and is used as a fluorescent kernel material; and a silicon oxide shell is formed on the surface of the fluorescent kernel through ethyl orthosilicate. The nanometer particle has the advantages of high fluorescent efficiency, simple preparation process, good biocompatibility and the like.

The invention discloses a watermark embedding and authentication method for PNG (Portable Network Graphic) electronic invoice image content protection. The method has the main steps that: a PNG electronic invoice image is blocked, and in addition, image blocks are divided into a key class, a uniform class and a nonuniform class according to the contents of the image blocks and whether changeable pixel points are contained or not; the contents of image blocks of RGB (Red Green Blue) three components are respectively encrypted, then, watermark information is generated, and corresponding watermark embedding positions are selected according to different component image block classes; and the authenticity of the image blocks is judged through comparing the consistency of image block reconstructing watermarks and extracted watermarks, in addition, a transverse neighborhood extending detection method is adopted for further improving the tamper detection performance, and finally, an authentication result of an electronic invoice to be detected is obtained through integrating the detection conditions of the RGB three components. The watermark embedding and authentication method has the advantages that the watermark invisibility is enabled to be realized, and meanwhile, the increase in the PNG image size is little; the tamper detection accuracy is high; the false detection rate is low; and the tamper such as replacing, adding, deleting and collaging can be effectively resisted.

The invention discloses a composite condensation product with a double-embedding function as well as a preparation method and application of the composite condensation product. The preparation methodcomprises the following steps: (1) adding Zein into an ethanol water solution, and carrying out stirring for dissolving to obtain a Zein solution; (2) adding chitosan into an acetic acid solution, carrying out stirring for dissolving, and then carrying out overnight hydration to obtain a chitosan anti-solvent solution; (3) adding curcumin and quercetin into the Zein solution, carrying out uniformstirring and mixing, and then carrying out overnight hydration to obtain a Zein-Cur-Que mixed solution; and (4) adding the chitosan anti-solvent solution into the Zein-Cur-Que mixed solution, carryingout uniform stirring and mixing, then carrying out rotary heating to remove ethanol, and then adjusting the pH value to 3.0-7.0 to obtain the composite condensation product with the double-embeddingfunction. The composite condensation product disclosed by the invention can simultaneously embed two substances with different polarities, is high in embedding rate and high in bioavailability, and can be used in the field of food processing.

The present invention relates to a video steganography method based on motion vector local optimality preservation. Criteria for motion vector local optimality and a search algorithm for optimal candidate motion vectors are established. On this basis, by constructing a reasonable motion vector disturbance cost calculation model and selecting the most efficient steganographic codes, covert channels are established to complete steganographic insertion of secret information, and an extraction process of the secrete information is thus completed. Syndrome trellis code (STC) steganographic codes are preferably adopted. The method provided by the present invention is a motion vector field video steganography method which is based on motion vector local optimality preservation, has a high insertion efficiency and can effectively resist conventional steganalysis attacks, and is especially applicable to covert communication situations with high safety requirements.

The invention discloses a full-automatic assembly discharging assembly line which comprises a base 5. A rotating disc 6 is rotationally connected to the base 5 and is provided with sliding rails 7 used for containing first workpieces 3. A first motor used for driving the rotating disc 6 to rotate is arranged on the base 5. A first material barrel 1 used for providing the first workpieces 3 for thesliding rails 7 is arranged at the position, above the rotating disc 6, of the base 5. The base 5 is in sliding connection with a sliding table 8 through a guide assembly, wherein the sliding table 8is used for containing second workpieces 4. Lifting pressure springs 9 are arranged between the sliding table 8 and the guide assembly. A second material barrel 2 used for providing the second workpieces 4 for the sliding table 8 is arranged at the position, above the sliding table 8, of the base 5. The position, below the first material barrel 1 and the second material barrel 2, of the base 5 isin sliding connection with a valve plate 10. A drive device used for driving the valve plate 10 to slide so as to open or close a discharging opening in the lower end of the first material barrel 1 and a discharging opening in the lower end of the second material barrel 2 is arranged on the base 5. According to the full-automatic assembly discharging assembly line, the automation level is higher,and assembly efficiency is improved.

The invention discloses a preparation method of a novel double-targeted pectin-dobby polyethylene glycol-combined anticancer drug. The double-targeted nanometer drug is prepared by comprising the following steps: coupling a folic acid-modified pectin with a drug-carrying dobby polyethylene glycol to form a precursor drug, then mixing the precursor drug with another hydrophobic anticancer drug according to a certain ratio, and self-assembling to obtain a nanometer drug with double-targeted function on colon cancer. The double-targeted nanometer drug prepared by adopting the method solves the problems that the most of anticancer drugs are poor in water solubility, low in bioavailability and the like by utilizing the good biocompatibility, bioactivity, biodegradability and tissue adhesion action of natural pectin, double-targeted function endows the nanometer drug with stronger selective healing function on the colon cancer. The nanometer drug prepared has stable drug carrying rate, encapsulation efficiency and good particle size distribution, thus having good clinical application prospects.

The invention discloses a metro construction ground settlement monitoring point burying method. The method comprises steps as follows: 1, a core drill with a diameter of 50 to 80 mm is adopted to perform drilling to a designed depth, and a monitoring hole is obtained; 2, fine stone concrete is poured to the bottom of the monitoring hole; 3, a reinforced bar is vertically inserted in the monitoringhole along the medial axis, the bottom end is inserted in the fine stone concrete and the top end is close to the outlet position of the monitoring hole, and the top end of the reinforced bar is setto be a hemisphere protruding upward; 4, fine sand is poured into the monitoring hole to the position of placing a steel casing; and 5, fine sand is continuously poured into the monitoring hole untilto be close to the head hemisphere of the reinforced bar. In the case of core drilling by the method, a bit with one specification is only needed, one-time hole formation is achieved, the step of changing a bit is reduced, the bit with a small diameter is adopted, the core drilling difficulty is reduced, and the drilling speed is quickened.

The invention relates to a probiotics microcapsule and a preparation method of probiotics microcapsule freeze-dried powder. The preparation method comprises the following steps: activating a bacterialstrain, preparing a fermented skimmed milk bacterial solution, preparing a microcapsule, freeze drying and the like. The microcapsule particles prepared in the invention are good in morphological characteristics and compact in surface, the particle size is 70 to 130 micrometers, the coating rate is greater than 85 percent, the gastric acid resistance is good, and the intestinal juice release performance, the freeze drying resistance and the storage stability are good, so that the probiotics can be protected against the adverse environment, the health effect of the probiotics in the human bodycan be improved, and the defects of the traditional embedding method are solved. The technology for preparing the probiotics microcapsule can be widely applied to the technical fields such as food, biological technology and the like.

The invention discloses a reversible data hiding method of a ciphertext domain image based on pixel difference coding. The reversible data hiding method comprises the following steps: 1, calculating apixel difference; 2, performing image encryption; 3, performing reversible data hiding of a ciphertext domain of the image; and 4, performing data extraction and image recovery. According to the method, the utilization rate of the potential redundant information of the image is improved through the proposed image coding mode, so that the higher embedding capacity can be obtained while the image safety is ensured.

The invention discloses a full-automatic feeding, assembling and discharging all-in-one machine. The full-automatic feeding, assembling and discharging all-in-one machine comprises a base. A bracket used for holding a first workpiece is arranged on the base. A clamping device used for clamping the first workpiece is arranged on the bracket. A sliding table used for holding a second workpiece is slidably connected with the base through a guiding assembly. A lifting compression spring is arranged between the sliding table and the guiding assembly. A first clamping block and a second clamping block are slidably connected with the parts, on the two sides of the second workpiece, of the sliding table correspondingly. The first sliding clamping block and the second clamping block are symmetrically distributed on the two sides of the sliding table. The base is provided with a contraction device used for driving the first clamping block and the second clamping block to contact and stretch synchronously. The full-automatic feeding, assembling and discharging all-in-one machine provided by the invention is higher in automation level and improved in assembling efficiency.

The invention discloses a pore water pressure gauge deep-layer embedded device which comprises a steel tube (1), a string (3), a cable (5), a sleeve (6), a clip (7) and a pore water pressure gauge (9). The pore water pressure gauge deep-layer embedded device is light and handy in structure, easy to operate, good in quality and high in efficiency.

A cryogenic tissue sample embedding storage system belongs to the field of cryopreservation of biological tissue samples, which in particular, relates to a cryogenic tissue sample embedding storage system. The present invention provides a cryogenic tissue sample embedding storage system that can avoid the confusion of samples, prevent damage to identifier information in the cutting process, and has high embedding efficiency. The present invention comprises an embedded label, a label cover, and an embedding base, and in terms of its structure, the embedding base is provided with a groove structure for placing and limiting the position of the embedded label, and an embedding enclosure wall flexibly connected to the embedding base is disposed above the groove structure.

The invention discloses a preparation method of purple perilla anthocyanin microcapsules. The preparation method comprises the following steps of using purple perilla leaves in a bud period as a material, using a purple perilla anthocyanin crude extract obtained through macroporous resin purification as a core material, using maltodextrin and arabic gum as wall materials, performing homogenizing to obtain mixing liquid of the wall materials and the core material, and performing freeze drying, so as to finally obtain purple perilla anthocyanin microcapsule products. According to the preparationmethod disclosed by the invention, a microencapsulation method is simple, through microencapsulation of anthocyanin of purple perilla, the stability of the anthocyanin is improved, the antioxidant activity of the anthocyanin of the purple perilla is maintained, and the anthocyanin of the purple perilla, as a food additive, can be applied to food industry.

The invention discloses a smart contract based concealed communication method under a blockchain. The concealed communication method comprises the following steps: preliminary encryption and coding are carried out on concealed information to be transmitted; and a keyword key is generated; a sender transmits the key and the hash value of the key to a receiver; the receiver judges whether the keyword key is tampered or not, if the keyword key is tampered, communication is terminated, and if not, the next step is executed; the receiver creates a contract according to the key so as to correspond to the real information sequence; the receiver creates an address white list called by the contract; the sender publishes the contract, and after the miner finishes mining, the contract is formally deployed in the block chain; the sender calls the contract; the receiver restores the encrypted information according to the contract calling record; and the receiver performs decoding and decryption inverse processing on the restored encrypted information to restore the original information. The invention provided by the invention is simple, high in security and tamper resistance, low in complexityof used contracts, and good in application prospect.

The invention provides zinc oxide for feed and an embedding method thereof. The method comprises the following steps: preparing a sodium alginate water solution with a mass percentage of 0.5 to 2%; adding 20 to 200 grams of nano zinc oxide for feed and carriers into the solution under stirring, evenly mixing; preparing a CaCl2 solution with a mass percentage of 2 to 4%; dropwise adding the mixture of sodium alginate, zinc oxide, and carriers into the CaCl2 solution to form microspheres, and washing and drying the microspheres to obtain the product. The zinc oxide prepared by the method mentioned above has a strong oxidizing, sterilizing, and toxin-removing performance, can effectively reduce diarrhea, prominently increases the daily gain of weaned piglets, and reduces the feed conversion ratio. Moreover, the using amount of zinc oxide is largely reduced, and thus the heavy metal pollution is greatly relieved.