9results about How to "Scale adjustable" patented technology

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 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.

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 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.

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 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.