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311results about How to "Improve controllability" patented technology

Two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof

InactiveCN103722169AImprove controllabilityGood particle dispersionCell electrodesTube furnaceCarbon source
The invention discloses a two-dimensional porous graphitized carbon-coated nickel-tin alloy material and preparation and application thereof. Carbon-coated nickel-tin alloy nano-particles are uniformly embedded into two-dimensional porous graphitized carbon plates to form the material. A preparation procedure for the material includes utilizing NaCl as a dispersing agent and a carrier, dissolving the NaCl in a nickel source and a carbon source, mixing the NaCl, the nickel source and the carbon source, drying the NaCl, the nickel source and the carbon source under a vacuum condition and finely grinding the NaCl, the nickel source and the carbon source to obtain a mixture; placing the mixture and a tin source to be subjected to gas-phase exchange into a tube furnace, and calcining the mixture and the tin source under the protection of inert gas to obtain a calcined product; washing the calcined product to obtain the two-dimensional porous graphitized carbon-coated nickel-tin alloy material. The two-dimensional porous graphitized carbon-coated nickel-tin alloy material, the preparation and the application have the advantages that the preparation procedure is safe and harmless, operation is simple, the yield is high, and the prepared two-dimensional porous graphitized carbon-coated nickel-tin alloy material which is used as a cathode material of a lithium ion battery is high in reversible capacity and cycle stability.
Owner:TIANJIN UNIV

Double-fed type wind generating set low-voltage-ride-through control method based on electromagnetic transient algorithm

ActiveCN103269088AImprove controllabilityExpand the scope of failureElectronic commutation motor controlVector control systemsWind forceLow voltage ride through
The invention discloses a double-fed type wind generating set low-voltage-ride-through control method based on an electromagnetic transient algorithm. The double-fed type wind generating set low-voltage-ride-through control method is characterized in that when falling fault happens to power grid voltages, a control system controls double-fed motor stator flux linkage decoupling, transient state compensating current computing and composition and rotor current loop closing, so that a low-voltage-ride-through purpose of a double-fed type wind generating set is achieved. According to the requirement that transient state voltage impact at a double-fed motor rotor end is lowered when a power grid falls, transient state compensating currents are injected into the double-fed motor rotor end, the angle of the double-fed motor rotor end is set, so that the transient state voltages at the rotor end is optimally controlled when the power grid voltages fall, and accordingly impact from the transient state voltages on the double-fed type wind generating set when the voltages fall is lowered, and meanwhile decay speed of stator direct current flux linkage can be increased, a transient state process of a system is shortened, and influence from a flux linkage negative sequence component on the wind generating set is lowered. Accordingly, through the low-cost high-reliability control method, the voltage fault range which the double-fed type wind generating set can ride through is expanded, and the low-voltage-ride-through performance of the double-fed type wind generating set is greatly improved.
Owner:HEFEI UNIV OF TECH

Combined atomization type device and method for preparing spherical metal alloy micro powder

ActiveCN106862578AImproved particle size controllabilityImprove controllabilityMotor protectionTundish
The invention relates to a combined atomization type device and method for preparing spherical metal alloy micro powder. The device comprises an induction melting furnace, a tundish, an inert gas pipe for atomization, a gas atomization spray ring, a centrifugal atomization rotating disc, a high-speed motor, a motor protection shell, an atomization chamber shell, a fixed support and a melting operation bin shell. According to the combined atomization type device and method for preparing the spherical metal alloy micro powder, powder prepared through gas atomization and powder prepared through centrifugal atomization are combined to be used together, so that the pressure of gas for gas atomization and the rotating speed of the centrifugal atomization rotating disc are decreased, the operation difficulty in the manufacturing and production processes of the device is substantially lowered, mass production is achieved, and the prepared metal alloy micro powder meets the specification and requirements of 3D printing for the metal alloy micro powder; and particularly, the method provided by the invention has the advantages that a metal alloy micro powder product is narrow in particle size distribution and good in controllability, the degree of sphericity is significantly improved, the oxygen content is substantially reduced, and meanwhile, the equipment investment and production operation cost are reduced.
Owner:连云港倍特超微粉有限公司 +1

Long-acting antibacterial hydrogel and preparation method thereof

The invention relates to the technical field of medical functional dressings, in particular to long-acting antibacterial hydrogel and a preparation method thereof. The hydrogel is characterized in that hydrogel dressing is formed through adding medicine ingredients into a sodium alginate solution to be taken as water phases jointly, wrapping the medicine ingredients in a microcapsule and then adding the microcapsule into a gel substrate; a wound surface is coated with the dressing during the use; under the action of wound surface exudates and body temperature, the microcapsule gradually swells to release the medicine ingredients, so that the controllability of medicine ingredient release is realized, a slow-release effect is realized, medicines can continuously act on a wound in a long-acting way, and the defects that the medicine ingredients cannot continuously realize a medicine effect as traditional dressing directly and completely releases the medicines, and the dressing is required to be constantly replaced are overcome. Chitosan oligosaccharide plays a good role in promoting wound healing, and organosilicon quaternary ammonium salt plays an antibacterial role. Meanwhile, in the long-acting antibacterial hydrogel, the combination of the chitosan oligosaccharide, sodium alginate and calcium chloride is adopted for cross-linking to from the microcapsule, so that the biological toxicity of a chemical cross-linking agent is avoided.
Owner:HENAN HUIBO MEDICAL CO LTD

Far infrared flexible wearable heating sheet and preparation method and application thereof

PendingCN108848586AUniform resistance distributionImprove controllabilityHeating element materialsHeating filmFar infrared
The invention discloses a far infrared flexible wearable heating sheet and a preparation method and an application thereof. The preparation method comprises the following steps that at least one flexible heating body and a flexible insulating material layer are provided, wherein each flexible heating body is electrically connected with an electrode; the flexible heating body comprises a carbon material heating film, wherein the carbon material heating film comprises a carbon material layer, parallel electrodes or interdigital electrodes arranged at the two ends and/or on the two sides of the carbon material layer, and high-temperature-resistant insulating layers for covering the two sides of the carbon material layer; and the flexible insulating material layer is arranged on the two opposite sides of the flexible heating body, and lamination and curing are performed by fast pressing or transfer pressing equipment, so that sealing and insulation of the heating body and the electrode arerealized, wherein the carbon material heating film is prepared by wet coating. According to the preparation method, batch consistency preparation of the flexible carbon material heating film is realized by utilizing a wet-process coating technology; and through electrode design, the carbon material heating film can be driven by a low voltage so as to generate heat, and application to the field offlexible wearable heating can be realized finally.
Owner:SUZHOU HANANO MATERIALS TECH LTD

Device and method for electrochemically treating sewage with microorganisms and microbial film culture method

InactiveCN105859054AImprove controllabilityImprove processing efficiencyWater treatment parameter controlTreatment by combined electrochemical biological processesChemistrySmall footprint
The invention discloses a method and device for electrochemically treating sewage with low-concentration carbon sources and super-high concentration ammonia nitrogen with microorganisms. The method includes the steps that under the condition that free or only a small quantity of carbon sources exist, high-concentration ammonia nitrogen sewage is treated with the electrochemistry biological denitrification method, ammonia nitrogen pollutant is converted into harmless nitrogen, operation is easy, secondary pollution is avoided, the ammonia nitrogen content of the sewage is up to the standard, and the sewage can be safely discharged; the sewage pretreated by a grating and grit chamber enters an aerobic electrode chamber, a bacteria nitrifying membrane or sludge particulates are subjected to a nitratlon reaction through oxygen generated by electrolyzed water, and ammonia nitrogen is removed; the sewage enters an anaerobic/anaerobic electrode chamber through an isolation pond, a bacteria denitrifying membrane loaded on the conductive electrode surface is subjected to an electrode denitrification reaction through electrons, and nitrate and nitrite are converted into harmless nitrogen. According to the method and device, the occupied area is small, organic carbon sources are not required for denitrification when the high-concentration ammonia nitrogen sewage is treated, the treating efficiency is high, operation is stable, energy is saved, the device is easy and convenient to maintain, and the good application prospects are achieved.
Owner:JURONG SUMITE ENVIRONMENTAL PROTECTION TECH CO LTD

Automatic feed pelleting device

The invention discloses an automatic feed pelleting device. The device comprises a shell which is of a cavity cuboid structure, a control box is fixedly connected to the side surface of the bottom of the shell, and a controller and power connectors are arranged in the control box; a display screen is arranged on the side surface of the middle of the shell, an indicator light and an alarm are arranged on the display screen respectively, and a feed inlet matched with a discharging hopper is formed in the top surface of the shell; a screen mesh is arranged below the feed inlet, the side surfaces of the screen mesh are movably connected to the inner walls of the side surfaces of the shell respectively, and a buffering warehouse is arranged below the screen mesh; the side surface of the buffering warehouse is fixedly connected to the inner wall of the side surface of the shell through a fixing rod, a first electromagnet is arranged on the side surface of the bottom of the buffering warehouse, an open-close door is arranged on the bottom surface of the buffering warehouse, and one end of the open-close door is rotatably connected to one end of the bottom surface of the buffering warehouse. The device has the advantages the device is easy to operate, high in automatic degree and good in pelleting effect and can effectively save labor.
Owner:CHENGDU PUJIANG KEXIAN TECH

Dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane and preparation and application thereof

The invention relates to a dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane for gas separation, and belongs to the technical field of membrane separation. The dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is characterized in that the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is mainly made of dopamine, metal organic compounds and polyether co-polyamide; the surfaces of the metal organic compounds are modified by the dopamine at first, then the modified metal organic compounds and the polyether co-polyamide are mixed and stirred with one another at certain temperatures, and the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane with a controllable thickness can be obtained by the aid of scrape coating technologies. Compared with the traditional metal organic compound mixed substrate membranes, the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane has the advantages that defects of interfaces between the metal organic compounds and polymer substrates can be obviously improved, and the affinity of the metal organic compounds and the polymer substrates can be improved; the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is high in gas permeation flux, has a high separation factor and is particularly applicable to separating carbon dioxide in the air.
Owner:JIANGNAN UNIV

Structure of nanometer line cold-cathode electron source array with grid and method for producing the same as well as application of flat panel display

The invention discloses a structure of a nano-wire cold cathode electron source array with a grid electrode, and a production method and an application thereof in flat panel display. The electron source array structure comprises a substrate, a cathode electrode strip and a grid electrode strip which are mutually crossly arranged and produced on the substrate, an insulating layer between a cathode and the grid electrode, and a nano-wire cold cathode array produced on the cathode electrode strip. The electron source array structure is produced by adopting a method combining a film micro-processing technology and a self-assembly growth technology. In the method, a nano-wire cold cathode is made by adopting a direct oxidation method without catalyst. In addition, a covering layer is produced on the cathode for protecting a source material required for the growth of nano-wires and limiting the growth of the nano-wires in a region close to the grid electrode. The electron source array structure adopts the nano-wires as the cold cathode, has simple production method and technology as well as high controllability, and can be applied to panel display devices of field emission.
Owner:SUN YAT SEN UNIV
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