11results about How to "Strong industrial applicability" patented technology

The invention discloses a ring piece ultrasonic detection noise reduction and identification method and system and a computer storage medium. The method comprises the steps that a matched ultrasonic phased array probe is selected according to the shape and size of the cross section of a workpiece, and technological parameters are set and comprise at least one of the probe frequency, the number of array elements, the water layer height and the focusing depth; according to the selected ultrasonic phased array probe and process parameters, ring piece water immersion ultrasonic phased array detection is carried out, full-coverage scanning is carried out in a weld joint area, and the scanning position of the probe is recorded in real time through an encoder; in the scanning process, an ultrasonic image scanned by the phased array probe is collected in real time, and the ultrasonic image is transmitted to a pre-trained adaptive noise reduction YOLOv5 target detection model for defect recognition; and the rotating angle position of the ring piece is recorded in real time through an encoder, and when the target detection model finds defects, the defect position is recorded, and alarm information is generated. The method is suitable for ring piece ultrasonic detection noise reduction and recognition, the defect recognition accuracy can be improved, and the manual labor intensity is reduced.

The invention discloses a preparation method of a Co / Cu nano-alloy catalyst for reducing ammonia through electro-catalysis of nitrate, and belongs to the technical field of electro-catalysts and preparation thereof. The invention solves the problems of low Faraday efficiency and low yield in the process of converting nitrate into ammonia through electro-catalysis in the prior art. According to the invention, Cu and Co are compounded to prepare the catalyst of nitrate reduced ammonia with a nanoneedle structure, and the catalyst shows excellent Faraday efficiency and yield in nitrate reduced ammonia. A test result shows that the ammonia yield of the prepared Co / Cu nano-alloy catalyst reaches up to 16762.68 ugh <-1 > cm <-2 > and the Faraday efficiency is kept above 90% when the Co / Cu nano-alloy catalyst is in a mixed solution of 0.1 mol / L KNO3 and 1 mol / L KOH and the RHE is-0.5 Vvs.RHE. In addition, when the catalyst is at-0.4 V vs.RHE, the ammonia yield and the Faraday efficiency are kept stable during 10 cycles of the reaction.

The application belongs to the technical field of biology, and discloses a Yarrowia lipolytica engineering strain for efficiently producing eicosapentaenoic acid based on citric acid metabolism regulation, a method and application, wherein a chassis strain of the engineering strain is Yarrowia lipolytica Po1f, and genes of Δ9 elongase, Δ8 desaturase, Δ5 desaturase and Δ17 desaturase in a fatty acid synthesis pathway, a heterologous ATP-citrate lyase and a mitochondrial citrate carrier are overexpressed. ATP-citrate lyases and mitochondrial citrate carrier genes respectively derived from Schizochytrium sp. and Saccharomyces cerevisiae are combined to be expressed in the Yarrowia lipolytica engineering strain, so that the production of EPA and oil in the Yarrowia lipolytica engineering strain is significantly improved, and compared with a control strain, the production of oil and EPA is respectively increased by 243.35% and 161.85%.

The invention discloses a catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. The catalyst comprises a metal nickel-based active component and a metal oxide deposited on the surface of the metal nickel-based active component; wherein the metal oxide comprises any one or a combination of at least two of vanadium oxide, molybdenum oxide or tungsten oxide. The catalyst has high activity and high selectivity for preparation of gamma-butyrolactone through hydrogenation reduction of maleic anhydride or succinic anhydride, the preparation process is simple to operate, the catalytic process is high in safety, the catalyst has excellent stability, the quality and quality stability of the product are improved, the process cost is reduced, the catalyst synthesis and modification cost is low, and the catalyst is suitable for industrial production. The large-scale production is facilitated.

The utility model provides a metal-free hair retainer. A first clamping body and a second clamping body of the metal-free hair retainer are respectively composed of a connecting section, a clamping part and a force application part with a through hole. The connecting section is provided with a positioning groove; a pivot joint seat with a pivot hole, an abutting block and a limiting block are arranged at the joint of the connecting section and the force applying part of the first clamp body; the connecting section of the second clamp body is provided with two free ends, the two free ends are respectively provided with a pivot joint wall of a pivot column in a protruding mode, and the connecting section of the second clamp body is provided with a protruding block; the elastic retaining ring is arranged in a C shape, the two ends of the elastic retaining ring can penetrate through the corresponding penetrating holes respectively and are buckled to the corresponding positioning grooves, the section thickness between the two free ends of the elastic retaining ring is equal, and the section width of the elastic retaining ring and the length of the first clamp body and the length of the second clamp body are arranged in an equal proportion; the elastic retaining ring is made of one or a combination of polypropylene, acrylonitrile-butadiene-styrene, polystyrene and an ecological environment-friendly material. The metal-free hair retainer is high in safety and durable and does not damage hair.

The embodiment of the invention provides a preparation method of a lithium manganese iron phosphate positive electrode material, which comprises the following steps: providing lithium iron phosphate and LiMnxFe (1-x) PO4 (x is greater than 0.5), physically mixing the lithium iron phosphate and the LiMnxFe (1-x) PO4, and sintering to obtain the lithium manganese iron phosphate positive electrode material. According to the preparation method of the lithium manganese iron phosphate provided by the embodiment of the invention, on one hand, the lithium manganese iron phosphate positive electrode material with stable crystal form and uniform granularity can be obtained only by simply mixing and sintering two raw materials at a certain temperature, a chemical reagent synthesis process is avoided, the cost is saved, the operation is simple, and the industrial applicability is high; and on the other hand, the method can be used for recycling the LiFePO4 material, and the additional value of the lithium iron phosphate is improved by recycling the lithium iron phosphate.

The application provides a promoter capable of improving transcription level of an adenylosuccinate lyase gene and application, the promoter is based on the sequence shown in SEQ ID NO: 1 and is subjected to mutation, and five promoters capable of strengthening transcription level of the adenylosuccinate lyase gene and capable of improving expression of an alpha-amylase amyE gene from Bacillus subtilis subsp. subtilis str. 168 in coryneform bacteria are obtained.

The present application relates to the technical field of intelligent maintenance of printing equipment, and provides a printing equipment predictive maintenance method based on big data analysis, which comprises the following steps: acquiring paper feeding state data, production process data and environmental data; determining effective micro-delay amount and delay occurrence position based on the difference between the theoretical arrival time and the actual arrival time of paper in the paper feeding path, and making a preliminary judgment on the printing equipment according to the above data to identify normal paper feeding state, abnormal adsorption paper feeding state, abnormal mechanical handover state and uncertain paper feeding state; when being in the uncertain paper feeding state, making a secondary judgment by further combining paper type, paper storage time length and workshop humidity to identify paper moisture absorption abnormal state, dust pollution abnormal state and working condition adaptation abnormal state, and formulating corresponding maintenance strategies. The present application can identify paper feeding abnormalities in advance, improve abnormal identification accuracy and maintenance pertinence, and reduce downtime and maintenance cost.

The invention relates to the field of biochemical engineering, and provides application of thermococcus-derived aldolase and a mutant thereof in glycol synthesis, and the aldolase mutant, a coding gene, a recombinant plasmid and a recombinant bacterium thereof. Wherein the amino acid sequence of the thermococcus-derived aldolase is as shown in SEQ ID NO. 1; the mutant is obtained by mutating the aldolase. The aldolase and the mutant thereof are high in catalytic efficiency, efficient biosynthesis of 1, 3-propylene glycol and 1, 3-butanediol is achieved, and the aldolase and the mutant thereof have good industrial application prospects.

This invention belongs to the field of biomedical technology and relates to a *Spatholobus suberectus* polysaccharide, its preparation process, and its application. The process includes the following steps: enzymatic hydrolysis of *Spatholobus suberectus* using a complex enzyme consisting of mannanase, xylanase, and cellulase in a mass ratio of (0.8~1.2):(0.8~1.2):(0.8~1.2); ultrasonic extraction of the hydrolyzed material; and purification and drying of the ultrasonically extracted extract to obtain the final product. This preparation process yields a high-yield *Spatholobus suberectus* polysaccharide; the prepared polysaccharide exhibits significant antioxidant, immunomodulatory, intestinal barrier repair, and intestinal flora regulation activities. It can effectively improve the immunodeficiency state induced by cyclophosphamide in mice, repair damage to immune organs, promote immune cell proliferation, regulate the secretion of immune-related cytokines, and exert an overall immune repair effect through the gut-immune axis; providing reliable experimental evidence for the subsequent development of novel natural immunomodulatory products.

The invention discloses a sink roll device for preventing slag at the bottom of a zinc pot from being rolled up, which comprises a sink roll body arranged in the zinc pot, support arms respectively connected with two end parts in the axial direction of the sink roll body, and shutter grids arranged in pairs, the shutter grids are respectively arranged at the positions corresponding to the two end parts in the axial direction of the sink roller, and each shutter grid is arranged between the bottom of the zinc pot and the sink roller body; the shutter grid is provided with a plurality of grid pieces which are arranged in parallel, and a gap is formed between every two adjacent grid pieces. According to the sink roll device for preventing the zinc pot bottom slag from being rolled up, the two ends of the sink roll can be prevented from stirring the bottom slag, the defects caused by the zinc slag are reduced, and better hot galvanizing surface quality is obtained.