19results about How to "Scale adjustable" patented technology

The invention belongs to the technical field of new materials, and discloses an alloy oxide tritium-resistant coating and a preparation method thereof. The preparation method comprises the following steps: after a metal base material is pretreated, sputtering a metal Cr target by adopting a magnetron sputtering technology, and depositing a pure Cr base layer on the surface of the metal base material; a magnetron sputtering technology is adopted, an oxidation transition layer and an alloy oxide layer are sequentially deposited on the surface of a pure Cr base layer by sputtering an Al target and a Cr target at the same time in a dual-power mode, and a composite coating is obtained; and the composite coating is subjected to annealing treatment, and the alloy oxide tritium-resistant coating containing the crystalline oxide is obtained. According to the preparation method, the problem of thermal mismatch between the coating and the base material can be effectively relieved, and the alloy oxide tritium-resistant coating with high binding force with the base material is successfully formed on the surface of the metal base material; the preparation method is simple in technological process, free of pollution in the whole process, high in deposition speed and capable of saving cost; and the prepared alloy oxide tritium-resistant coating has good tritium-resistant and hydrogen-resistant performance.

The invention relates to a copper-indium-silver catalyst, a preparation method thereof and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen through electrocatalysis of carbon dioxide. The preparation method comprises the following steps: dispersing a multi-walled carbon nanotube in water to obtain a dispersion liquid A; dispersing copper nitrate trihydrate, indium nitrate hydrate and silver nitrate in water to obtain dispersion liquid B; mixing the dispersion liquid A and the dispersion liquid B to obtain dispersion liquid C; adding alkali into the dispersion liquid C to obtain a mixed solution D; and filtering and drying the mixed solution to obtain the copper-indium-silver electrocatalyst. The invention also provides the copper-indium-silver catalyst prepared by the method and a method for preparing synthesis gas with an adjustable ratio of carbon monoxide to hydrogen by electrocatalysis of carbon dioxide. According to the copper-indium-silver electrocatalyst provided by the invention, an electron-rich Cu site is formed by utilizing the synergistic effect of three metals, CO2 adsorption and CO desorption are promoted, and HER is inhibited, so that CO2RR and HER are balanced, and the selectivity of carbon monoxide synthesis gas is effectively improved.

The application discloses a multiscale voting mechanism denoising method for an event camera, and comprises the following steps: event stream data slice processing of event camera output, forming event stream data segments; according to the event camera pixel / resolution, the spatial position of the received event stream data segment is equally divided into multiple filtering areas according to the selected division scale, and each pixel area corresponding to each scale is a filtering area; the difference between the real event number and the average event number in each filtering area is calculated; noise voting of the filtering area pixel is carried out according to the positive and negative of the difference, noise voting results of the filtering area pixel under different scales are obtained, the noise voting results of the filtering area pixel under different scales are summed, and the final pixel noise voting result is obtained, and the noise event of the received event stream data segment is removed according to the final pixel noise voting result. The application directly processes event stream data, saves storage space and improves algorithm speed.

The utility model discloses an adjustable liquid crystal entity composite whiteboard for teaching, and relates to the technical field of liquid crystal whiteboards. Comprising a supporting device, a liquid crystal white board is installed in the supporting device, the supporting device comprises a supporting frame, the liquid crystal white board is installed in a frame of the supporting frame, and a gap is reserved between the front face of the liquid crystal white board and the front face of the supporting frame. Power is transmitted through the power bin to pull the limiting sliding block, so that the entity whiteboard piece can be rolled up or cover the outer surface of the liquid crystal whiteboard, important grammar, words and other information can be written on the surface of the entity whiteboard piece for long-term storage during Russian teaching, and the entity whiteboard piece is unfolded for display when needed; and the display proportion of the liquid crystal whiteboard and the entity whiteboard sheet is adjusted as required, so that the effects that the blackboard writing information can be stored for a long time and the proportion between the liquid crystal whiteboard and the entity whiteboard sheet can be adjusted are achieved.

The utility model discloses a proportion-adjustable art pigment color mixing device, which comprises a base, a fixed plate, a color mixing bowl, a carrier, a weight sensor, a sliding seat, a pigment barrel, a controller and an electromagnetic valve, the sliding seat is transversely arranged on the base, the weight sensor is arranged on the sliding seat, the carrier is arranged on the weight sensor, and the pigment barrel is arranged on the fixed plate. The color mixing bowls are arranged on the carrier, the pigment barrels are vertically arranged on the fixing plate and distributed at intervals along the transverse moving path of the sliding base, discharging pipes located above the transverse moving path of the sliding base are arranged at the bottoms of the pigment barrels, and the electromagnetic valves are arranged on the discharging pipes in series. According to the proportion-adjustable art pigment color mixing device, the carrier and the color mixing bowl can be moved through the sliding seat, so that the color mixing bowl is moved to the position below a specified pigment barrel, pigment in the pigment barrel is transferred to the color mixing bowl below the pigment barrel by opening a corresponding electromagnetic valve, weighing is carried out through a weight sensor, and proportion adjustment is achieved.

The invention discloses a chemical liquid mixing system which comprises a support and a base, a plurality of charging barrels are mounted on the support through a top plate, and a controller, a transmission shaft and a first motor for driving the transmission shaft to rotate are mounted on the top plate. In the process that a second motor drives a lead screw to rotate, a nut pair drives a moving block to move in the vertical direction, a sliding barrel drives a rotating rod, a gear and a transfer barrel to move under the action of a moving pin and two slopes, and the transfer barrel is turned over or reset under the action that the gear is meshed with a first rack and a second rack; and after a rectangular block and a rectangular groove are in butt joint, a third motor drives a threaded sleeve to rotate, a threaded rod drives a piston plate to conduct position adjustment, so that adjustment of the inner space of a transfer barrel is achieved, under the action of a liquid level switch, the liquid level is accurately controlled, and the operation efficiency is improved. The chemical liquid raw materials with different volumes are contained, and the mixing requirement of adjustable proportion is met.

A portable multi-agent proportional mixing device comprises a liquid inlet which is connected with an external water supply fire fighting truck or a fire hydrant and other water sources, and a control valve is arranged on a pipeline of the liquid inlet; two ends of the first liquid inlet unit are respectively connected with the liquid inlet and the first mixer, and the first liquid inlet unit is used for providing a first medicament; the first mixer is respectively connected with the first liquid inlet unit and the second mixer, and the second liquid inlet unit can suck the same medicament or different medicaments and output the medicaments to the second mixer; and the second mixer can mix the liquid output by the first mixer and the liquid output by the second liquid inlet unit, and finally outputs the mixed liquid to the connected medium release device. The invention provides a portable foam proportion mixing device and method capable of realizing combination of multi-component medicaments and adjustable proportion.

This invention belongs to the field of high-performance fiber composite materials technology, specifically relating to a method for preparing low-dielectric ramie fiber reinforced polycarbonate composite materials. First, ramie fibers with acrylate-type double bonds modified on their surface are prepared. Then, poly(styrene-isoprene) modified ramie fibers are prepared by copolymerizing the acrylate-type ramie fibers with styrene and isoprene. Next, polyphenylene ether and the poly(styrene-isoprene) modified ramie fibers are mixed evenly and added to a hopper. A polyphenylene ether / ramie fiber alloy is prepared using a twin-screw extruder. Finally, the polyphenylene ether / ramie fiber alloy is mixed evenly with polycarbonate and added to a hopper. A low-dielectric ramie fiber reinforced polycarbonate composite material is prepared using a twin-screw extruder. The molecular weight of the modified ramie fiber polymer is adjustable, as is the ratio of styrene to isoprene. The polystyrene segments effectively improve the compatibility between ramie fibers and polyphenylene ether, while the polyisoprene segments effectively enhance the toughness of the polyphenylene ether / ramie fiber alloy.

The invention discloses an electrocatalyst based on porphyrin molecules and a preparation method and application thereof, and belongs to the technical field of electrocatalysts. The preparation method comprises the following steps: S1, preparing a porphyrin ligand; s2, respectively reacting the porphyrin ligand prepared in S1 with metal cobalt and metal copper ions to prepare a metal cobalt porphyrin complex and a metal copper porphyrin complex; and S3, jointly loading the metal cobalt porphyrin complex and the metal copper porphyrin complex prepared in S2 on a carbon paper electrode to obtain a carbon nano composite material, namely a target electrocatalyst product. Cobalt porphyrin and copper porphyrin complex molecules and commercial carbon nanotubes are simply mixed for the first time and then loaded on a carbon paper electrode, the catalyst is simple to prepare and is used for an electrocatalytic reduction reaction, and synthesis gas with the adjustable hydrogen and carbon monoxide ratio can be prepared by simply mixing and regulating the molecular proportion.

The application provides a preparation method and application of a Pd-Ni composite metal oxide methane dry reforming catalyst. The application uses a palladium-nickel-based composite metal oxide catalyst with distributed active metals (Ni, Mg, Pd). The application applies the catalyst to a methane dry reforming reaction to prepare synthesis gas. The preparation method is simple. The proportion of each metal in the catalyst is adjustable and controllable, and the active metal nickel is uniformly distributed. Through relevant data processing and catalyst evaluation, it is confirmed that the catalyst has high catalytic activity, and has remarkable anti-coking and anti-sintering abilities. After 600 hours of stability test, the methane and carbon dioxide conversion rates are high and stable, and the H2 / CO ratio of the obtained synthesis gas is close to 1.

This invention discloses an in-situ depolymerization modification composition of mineral-derived humic acid, its method, and its applications. The composition comprises a hydrogen bond acceptor and an acidic hydrogen bond donor, wherein the hydrogen bond acceptor is selected from one or more of choline compounds, betaine compounds, and quaternary ammonium salt compounds; and the acidic hydrogen bond donor is an aliphatic polycarboxylic acid or a hydroxycarboxylic acid. This method is simple, green, and efficient, yielding a product with low molecular weight, good water solubility, and strong resistance to hard water. It is suitable for various product forms such as solid fertilizers, liquid fertigation fertilizers, and soil conditioners, and has broad application prospects in modern agriculture and ecological restoration.

The invention provides a preparation method of an anti-corrosion coating of a pole-mounted isolating switch. The preparation method mainly comprises the following steps: firstly, preparing a dopamine modified graphene oxide (DA-GO) composite material; secondly, preparing cellulose nanocrystallines (CNC); then mixing the DA-GO with CNC (computer numerical control) to prepare composite slurry; finally, the composite slurry is mixed with water-borne epoxy resin (WEP), a curing agent is added, the surface of a pole-mounted disconnecting switch part is coated with the composite slurry, an anti-corrosion coating is formed after curing, the surface of a pole-mounted switch metal exposed part is evenly coated with the prepared coating, and the anti-corrosion coating is obtained after curing. The performances such as water resistance, acid and alkali resistance and salt spray resistance are obviously improved.

The invention belongs to the technical field of micro-nano robots, and relates to a magnetic field driven chain-shaped micro motor and a preparation method thereof. The invention discloses a magnetic field driving chain-shaped micro motor, which comprises a rigid magnetic field driving chain-shaped micro motor and / or a flexible magnetic field driving chain-shaped micro motor, according to the rigid magnetic field driven chain-shaped micromotor, magnetic micro-nano particles which are arranged into micron wires by utilizing an external magnetic field are used as an inner core, a silicon dioxide layer is used as a middle layer, and a polymer layer is used as a shell; the magnetic field driven chain-shaped micro motor realizes driving motion through self-responsive rotation under the driving of an external magnetic field.

The invention relates to the technical field of biology, in particular to an enzyme co-immobilization strategy based on biomolecule click reaction and application of the enzyme co-immobilization strategy, and the enzyme co-immobilization strategy comprises the following specific steps: S1, preparing magnetic microspheres of which the surfaces are modified by haloalkane; s2, preparing a protein complex; s3, preparing a modular complex; and S4, preparing the immobilized multi-enzyme modular complex. The invention successfully establishes a plug-and-play method for assembling and immobilizing the multi-enzyme module, which is adjustable in proportion, adjustable in sequence and convenient to recycle. The immobilization system provided by the invention is simple in preparation method, can be recycled for multiple times for catalytic reaction, not only can immobilize pure enzyme, but also can realize specific immobilization of target protein in a cell lysis solution, effectively solves the problem of immobilization of protein with an unstable purification form, and has a good application prospect. The immobilization period is shortened; and the specificity of a protein immobilization method is poor.

This invention relates to the field of medical materials technology, and discloses a biodegradable esophageal stent and its preparation method. The esophageal stent is woven from blended monofilaments. The raw materials for the blended monofilaments include polylactic acid, polycaprolactone, and additives, including polyethylene glycol, carbon nanofibers, star-shaped PLA-PCL block copolymer, and talc. The preparation steps are as follows: the raw materials are mixed in proportion, melt-blended and granulated, and then the blended monofilaments are obtained using a high-pressure capillary rheometer; the blended monofilaments are woven into a mesh-like stent framework on a mold using an interlaced pressing method, then heat-set, and demolded after cooling; a thermoplastic polyurethane casting liquid loaded with bioactive substances is cast into a film and coated onto the inner wall of the stent framework; the thermoplastic polyurethane film is heated to fuse with the stent framework, and after cooling, the esophageal stent is formed. The esophageal stent of this invention has good mechanical properties, controllable degradation characteristics, and biocompatibility.

This invention relates to a nano-metakaolin-modified hydraulic lime-based composite material and its preparation and application. The composite material comprises natural hydraulic lime and nano-metakaolin dispersed in the natural hydraulic lime, wherein the mass ratio of natural hydraulic lime to nano-metakaolin is (60-90):(10-40). The nano-metakaolin-modified hydraulic lime-based composite material of this invention exhibits controllable dispersibility and fluidity in the slurry after mixing with water. It also demonstrates good rock compatibility, low soluble salt content, controllable curing time, suitable post-curing strength, low permeability, and low shrinkage and expansion rate. The presence of a repair agent can specifically enhance the additional protective performance of the reinforcement material. It possesses high applicability, safety, and durability for the protection of stone cultural relics, without causing derivative damage.

The utility model provides a device for reducing oxidation in a resistance furnace, which belongs to the field of heat treatment and comprises a nitrogen gas introduction path and a propane gas introduction path, the nitrogen introduction path comprises a nitrogen pipeline, and nitrogen is introduced through the inlet end of the nitrogen pipeline; the propane gas introduction path comprises a propane gas pipeline and a control device, propane gas is introduced through the inlet end of the propane gas pipeline, and the control device is arranged at the outlet end of the propane gas pipeline and used for adjusting the gas output of the propane gas; nitrogen conveyed by the nitrogen pipeline and propane conveyed by the propane gas pipeline are gathered through the mixed gas pipeline to form mixed gas, and the mixed gas is output to the resistance furnace. The resistance furnace has the advantages that residual oxygen in the resistance furnace is consumed while safety is guaranteed through mixed gas of propane gas and nitrogen gas, oxidation reaction between the surface of a workpiece and oxygen is prevented in production, the machined workpiece is stable in performance, the surface appearance is not abnormal, and the output quality is improved.

The invention provides a geopolymer-based biomass tar cracking catalyst material and a preparation method thereof. The geopolymer-based biomass tar cracking catalyst material is successfully prepared by using active materials such as a silicon-aluminum precursor material, an alkali activator, water, oxides of iron and manganese and the like as raw materials, and the material is simple in preparation process, high and adjustable in active component proportion, good in catalytic effect and small in environmental pollution.

The present invention discloses a HfC-SiC multiphase ceramic matrix composite material and a preparation method thereof. The present invention uses carbon fiber braid as a reinforcement, adopts an oxygen-free liquid HfC precursor and a SiC precursor to compound to obtain a HfC-SiC multiphase ceramic precursor, and prepares the HfC-SiC multiphase ceramic matrix composite material through a PIP process. The advantages of the present invention are: the prepared HfC-SiC multiphase ceramic precursor has a high ceramic yield and an adjustable ceramic component ratio, and some SiC ceramic components in the matrix exist in the form of whiskers, which can greatly improve the mechanical properties of the material; at the same time, the increase in the precursor ceramic yield can greatly shorten the preparation cycle of the composite material, thereby reducing the degree of damage to the carbon fiber during high-temperature cracking, and the obtained HfC-SiC multiphase ceramic matrix composite material has excellent mechanical and antioxidant properties.