34results about How to "Broaden research direction" patented technology

The invention discloses a signature authenticity identification system oriented to a signature pen. It includes information entry module, sample database module, feature model building module, feature extraction module, similarity measurement module and identification and output module. The identification process is that the feature model building module performs spatial modeling on the feature information collected by the information input module, and extracts the feature parameters of the relationship between the writing level pressure and the pen-holding posture with time and the length of the handwriting from the spatial geometric model, and constructs a matrix input system. The average information entropy of each type of feature is used to calculate its weight coefficient, and the comprehensive feature similarity between the information to be tested and the sample information is calculated by combining the method of matrix similarity measurement. In the identification and output module, the comprehensive similarity is compared with the similarity threshold corresponding to different signers, and the authenticity of the signature is verified and the final identification result is output. The signature verification and identity verification method proposed by the invention has objective and stable results.

A lipoic acid modified ethyl cellulose film and a preparation method thereof, the first step is to weigh ethyl cellulose in a reaction vessel, add an organic solvent, heat up and continue stirring until the ethyl cellulose is completely dissolved and then cooled to room temperature , can obtain ethyl cellulose solution; second step, weigh solid lipoic acid and join in reaction container, add organic solvent to dissolve, can obtain lipoic acid solution; The cellulose-based solution and the polymerization inhibitor are blended, stirred until the mixed solution is clear, poured into a mold, and put into an oven to form a film. Compared with the pure ethyl cellulose film, the membrane material of the invention has greatly improved mechanical properties and can broaden the application range of the ethyl cellulose film. In addition, the present invention uses the widely sourced and renewable ethyl cellulose as the raw material and the non-toxic and environment-friendly lipoic acid as the modifier, and the prepared film has excellent performance and has the advantages of water resistance and degradability.

The invention discloses a moving object two-dimensional trajectory tracking mechanism. The moving object two-dimensional trajectory tracking mechanism comprises a rack, a multi-point infrared acquisition device, a mechanical arm device and a driving device, wherein the multi-point infrared acquisition device is movably arranged at the lower part of the interior of the rack and is used for capturing the movement trajectories of a moving object, the mechanical arm device is fixedly arranged on the rack and is located above the multi-point infrared acquisition device in a lifting manner and is used for pressing the object on the multi-point infrared acquisition device, and the driving device is fixedly arranged on the rack and is used for driving the mechanical arm device. The moving object two-dimensional trajectory tracking mechanism of the invention has the advantages of simple operation, more accurate trajectory capture and high work efficiency.

The invention discloses a method for synthesizing a cationic polycarboxylate superplasticizer based on a Hoffmann rearrangement reaction, and belongs to the field of water reducing agents. Unsaturated amide monomers are modified into unsaturated isocyanate, meanwhile, an oxidation-reduction initiating system is formed by high-valence cerate and alcohol to initiate polymeric unsaturated cation quaternary ammonium salt monomers, a hydroxyl-terminated cation side chain is obtained, then isocyanate reacts with the hydroxyl-terminated cation side chain and polyethylene glycol monomethyl ether to obtain cationic macromonomers and polyether macromonomers, then the cationic macromonomers, the polyether macromonomers and small carboxylic acid monomers are subjected to free radical copolymerization, and the cationic polycarboxylate superplasticizer is obtained. Based on the Hoffmann rearrangement reaction principle, unsaturated amide modified amide reacts with the cation side chain and a polyether side chain, the macromonomers with different structures and different functions are designed and synthesized, and the novel pectinated polycarboxylate superplasticizer with polycarboxylic acid as a main chain and cations and polyether as the side chain is obtained finally. The synthesis process is continuous and easy to control, and multiple effects of excellent water reduction, collapse protection, clay resistance and the like are shown.

The invention discloses a fast decision-making method for 3D video depth image quadtree coding structure division. The method is: first obtain the optimal prediction mode of the current coding block and its first small subsidiary coding block, and the corresponding rate-distortion value through the traditional coding method; then determine the optimal mode of the first small subsidiary coding block Whether it is Skip mode, if so, further judge whether the rate-distortion value of the current coding block is less than or equal to 4 times the rate-distortion value of the first small subsidiary coding block, if so, terminate the quadtree coding structure of the current coding block in advance divided. The present invention reduces the complexity of intra-frame predictive encoding of depth images, reduces the encoding time required for prediction, and ensures the video quality of the synthesized view at the final decoding end.

Belonging to the field of dispersants, the invention provides a method for preparation of high mud resistant polycarboxylic acid dispersant by unsaturated halogenated hydrocarbon copolymerization and grafting with a cationic side chain. The method consists of: employing an unsaturated carboxylic acid monomer, an unsaturated halogenated hydrocarbon monomer, an unsaturated cationic quaternary ammonium salt monomer, a polyethylene glycol compound and the like as the raw materials, firstly conducting main chain copolymerization, then polymerizing the cationic side chain, performing functionalization, and finally carrying out etherification grafting so as to synthesize the excellent performance high mud resistant polycarboxylic acid dispersant material with unsaturated halogenated hydrocarbon copolymerized and grafted with cationic side chain, i.e. taking unsaturated carboxylic acid and unsaturated halogenated hydrocarbon as the reactants, conducting free radical polymerization to obtain a carboxylic acid-halogenated hydrocarbon copolymer main chain, using high valence cerium salt-alcohol to initiate polymerization of an unsaturated cationic quaternary ammonium salt monomer so as to obtain a hydroxyl terminated cationic side chain, then modifying the hydroxyl terminated cationic side chain and the polyethylene glycol compound to obtain a functionalized side chain, and carrying out etherification grafting of the functionalized side chain on the carboxylic acid-halogenated hydrocarbon copolymer main chain. The method provided by the invention realizes high water reduction, slump loss resistance, high clay resistance and other multiple effects.

The invention discloses a CNT:SNC:PEDOT ternary water-based conductive ink and a preparation method thereof. The method comprises: adding carbon nanotubes into the sulfated nanocellulose aqueous dispersion, dispersing evenly to obtain a CNT:SNC dispersion; adding EDOT monomer to the CNT:SNC dispersion, and stirring evenly to obtain a mixed solution; Ammonium persulfate and ferric chloride are added to the mixed solution, and polymerization reaction is carried out under an inert atmosphere to obtain the CNT:SNC:PEDOT ternary water-based conductive ink. The CNT:SNC:PEDOT ternary conductive ink has the advantages of water-based environmental protection, good stability, good adhesion, no heating and curing, and strong versatility. At the same time, the advantages of stable dispersion, high conductivity, excellent printing adaptability and coating mechanical stability make the conductive ink in the present invention expected to be applied to printing various flexible electronic devices.

A bio-based extreme pressure lubricant and a preparation method thereof. In the first step, a fatty acid, a compound containing a terminal double bond, a quaternary ammonium salt catalyst, and hydroquinone are mixed and reacted to obtain a fatty acid containing a terminal double bond; in the second step, the above The terminal double bond-containing fatty acid obtained in the first step and garlic oil are polymerized in an inert organic solvent containing an initiator; then the inert organic solvent is evaporated under reduced pressure to obtain a fatty acid-based extreme pressure lubrication additive; the third step is to use the obtained Fatty acid-based extreme pressure lubricant additives are dissolved in vegetable oil to obtain bio-based extreme pressure lubricants.

The invention discloses a 3D video depth image prediction mode selection method based on the viewpoint correlation. The method comprises the steps of: preliminarily judging the possibility that a current coding block selects the Skip mode by utilizing the viewpoint correlation at first; and then, for the coding block having high possibility, comparing the rate distortion RD-cost of the Skip mode with the rate distortion RD-cost of the 2N*2N Merge mode and the DIS mode, determining whether the current block selects the Skip mode or not, and ending a prediction mode selection process in advance. By means of the 3D video depth image prediction mode selection method based on the viewpoint correlation disclosed by the invention, the depth image prediction coding complexity can be reduced; the coding time required by prediction can be reduced; and furthermore, the video quality in the synthesis visual angle of the final decoding end can be ensured.

The invention discloses a bio-based primary amine cationic surfactant and a preparation method thereof, belonging to the technical field of surfactant science and application. The synthesis of the surfactant of the present invention includes taking oleic acid and methanol as the starting raw materials to undergo esterification, reduction, and substitution in sequence to synthesize oleyl alcohol, and the substitution, substitution, reduction, and acidification reactions of oleyl alcohol and 3-hydroxybenzaldehyde to obtain the final Biobased primary amine cationic surfactant. The source of raw materials is wide, bio-renewable, green and environmentally friendly, and has high biodegradability. It enriches the types of bio-based surfactants that use renewable resources as raw materials, and can be widely used in the research of surfactant self-organization systems.