134results about How to "Overcome the disadvantage of high cost" patented technology

The invention discloses a preparation method of bainite / martensite / austenite composite high-strength steel, belonging to the field of low-alloy high-strength steel. According to the composite high-strength steel, C, Mn, Si and Cr are used as main alloy elements, Al, Ni, Mo, Cu, Nb, Ti, V and the like are added, and the balance is Fe. The preparation method comprises the following steps: smelting, casting, forging or rolling to prepare rails, thick-wall pipes, large-section bars or thick pipes and the like by adopting a conventional steel-smelting process; carrying out austenitizing; controlling cooling by adopting different cooling media to obtain a part of bainite tissue in the cooling process; instantly carrying out distribution treatment and low-temperature tempering treatment so as to finally obtain a bainite / martensite / austenite composite tissue which is good in strong plasticity and toughness coordination, wherein the distribution time is 30-360 minutes. For a component which is large in size and easy to crack in quenching, the bainite / martensite / austenite composite high-strength steel has wide application prospect.

The invention provides a micro fluidic chip, which belongs to the technical field of micro fluidic. The chip comprises a substrate, the surface of the substrate comprises at least one reaction zone; a target molecule combination object is arranged in the reaction zone, and is used for capturing and / or combining target molecules in a to-be-measured liquid sample and is subjected to a combination reaction in the reaction zone; according to a liquid flow direction, in the reaction zone, and / or, at least one speed control zone is arranged at downstream position close to the reaction zone, a hydrophobic agent is arranged in the speed control zone, and is used for intercepting the target molecule in the reaction zone for full reaction, continuous flowing of the liquid sample cannot be completely obstructed, so that the control on flow velocity of the liquid sample is realized. The invention also provides an application of the chip and its preparation method thereof. The chip has the advantages of good repeatability, high sensitivity, and low cost.

The invention discloses a process for preparing alumina-based continuous fiber with a sol-gel method. The process comprises the following steps of: adding aluminium nitrate and one or a plurality of kinds of carboxylic acids with the carbon number of 2 to 24 to distilled water; ensuring the mixture to react in the condition of continuous stirring under a certain temperature to obtain transparent carboxylate aluminium gel; adding a certain amount of solvent to the carboxylate aluminium gel, and adding a certain amount of silicon-contained additives and superpolymer spinning additives to obtain an alumina-based fiber precursor solution; concentrating the solution to obtain spinnable alumina-based fiber precursor sol; placing the concentrated sol to a liquid storage tank with a spray head, and spinning by adopting a dry method or a wet method to obtain alumina-based continuous fiber protofilament containing organic matters; and drying and sintering the protofilament to obtain the alumina-based continuous fiber. The alumina-based continuous fiber obtained by adopting the invention can be used for reinforcement of composite materials so as to further enhance the strength and toughness of the materials and improve the heat resistance of the materials, and is widely applied in the fields of aerospace, automobiles, and the like.

The invention discloses a method for preparing a positively charged polyvinyl chloride (PVC) hollow fiber nanofiltration membrane. The positively charged PVC hollow fiber nanofiltration membrane has a two-layer structure consisting of a positively charged compact skin layer and an electrically neutral porous support layer; the pore diameter of micropores of the compact skin layer is 1-5nm, and the pore diameter of micropores of the porous support layer is 10-100nm; and the outer diameter of the membrane is 1.5-3.0mm, and the inner diameter of the membrane is 0.5-2mm, wherein the positively charged compact skin layer comprises main components of polyvinyl chloride and cationic copolymer; and the electrically neutral porous support layer comprises main components of polyvinyl chloride and an inorganic filler. The method for preparing the positively charged PVC hollow fiber nanofiltration membrane comprises the following steps of: co-extruding positively charged compact skin layer membrane preparing liquid and electrically neutral porous support layer membrane preparing liquid in a two-layer ring shape; and curing and forming hollow fibers by using a dry-wet spinning process. The prepared hollow fiber nanofiltration membrane has the advantages of easily controlled interception property, high strength, simple preparation process and the like, and is a high-performance, low-cost and long-life nanofiltration membrane material for water treatment.

The invention discloses a preparation method for an environment-friendly starch-based binder. According to the method, oxidized starch and modified protein are mixed according to a mass ratio of 2:1 to 5:1; polyvinyl alcohol is added according to a mass ratio of oxidized starch to polyvinyl alcohol of 2:1 to 5:1 and uniformly mixed with oxidized starch and modified protein, and an obtained mixture is subjected to a reaction for 2 to 5 hours at a temperature of 50 to 80 DEG C; first liquid of the binder is prepared; the first liquid of the binder is taken out, an auxiliary agent is added, and the environment-friendly starch-based binder is prepared by uniformly mixing the first liquid of the binder and the auxiliary agent; the auxiliary agent is borax and / or citric acid, and the amount of the auxiliary agent accounts for 2 to 5% of the amount of dry starch base. The oxidation starch is prepared by using sodium periodate as an oxidizing agent and mixing the oxidizing agent with starch at a temperature of 20 to 50 DEG C; the raw material in the invention, starch, undergoes a chemical reaction with protein and produces firm chemical bonds, which enables a net structure of the binder to be formed; the net structure and the action of cross-linking agents allow the binder to have improved stability and enhanced water resistance; the invention enables cost to be saved and the goal of environmental protection to be realized.

The invention relates to a pulley bracket platform with a large-column-grid and large-area grid structure and a construction method thereof by utilizing a pulley bracket method. A bracket body comprises a tower bracket, a suspended span bracket and a suspended overhang bracket; two longitudinal tower brackets are connected through a cross bracket; the bottoms and the tops of two traverse tower brackets are connected with the suspended span bracket; the top of the external side of the tower bracket is connected with the suspended overhang bracket; a steel pipe arranged on the bottom end of the tower bracket is sheathed on a pulley, and the axis of the steel pipe coincides to the axis of the pulley; the pulley is arranged on a guide rail; a sleeper is laid below the guide rail, and the sleeper and the guide rail are fixed in a spot welding mode; a pulley is arranged on the bottom surface of the pulley bracket platform; and the shift of a construction platform is realized by shifting the pulley. Compared with the traditional scaffold, the invention the advantages that the erecting amount and the dismantling of the scaffold can be reduced; the problems of overlarge deflection value and overlarge displacement deviation of a grid bracket to be erected because of overlarge integral settlement of a construction bracket are simultaneously avoided and can be widely applied to the installation and the construction of the large-column-grid and large-area grid structure.

The invention discloses a manufacturing method of a solution-processed organic-inorganic planar heterojunction light emitting diode. The method comprises the following steps of (1) coating a first electrode interface layer on a first electrode surface coated on a substrate; (2) using a solution processing method to coating a luminescent layer on the first electrode interface layer; (3) using the solution processing method to coat a second electrode interface layer on the luminescent layer; (4) evaporating a metal layer on the second electrode interface layer so as to form a second electrode, wherein the luminescent layer is a solution-processed organic-inorganic hybrid material which possesses a perovskite structure and is added with a polymer additive or an inorganic material; and the polymer additive is a polymer which can be dissolved in an organic solvent and possesses a linear structure or a branched structure. Through adding the polymer additive in the luminescent layer material, luminance of the light emitting diode, luminescence efficiency and the like are greatly increased and simultaneously a light voltage of the light emitting diode is reduced.

A method for preparing a near-net-shape foam aluminum part belongs to the preparation field of the porous foam metal material. The process steps of the method comprise that aluminum or aluminum alloy is heated and melted and adhesion promoter is added first for mixing and tackifying; and then the vesicant which is oxidated is added and the vesicant is mixed and dispersed fast; the tackifying molten metal which contains the vesicant is cast and cooled to obtain the cast which is provided with a void factor; the cast is compressed to obtain the compact foam precursor and the foam precursor is processed and put in a pattern die for heating and foaming to obtain the foam aluminum part which is provided with the needed pattern and hole structure. The invention is characterized by simple process and low cost and overcomes the detects of the conventional powder working process; in this way, large foam aluminum part can be obtained and large-scale production can be realized.

The invention discloses technology of preparing aluminium oxide based continuous fibers by a sol-gel process, which is characterized by adding one or more polyols containing 3-6 carbon atoms into anhydrous ethanol, adding aluminum powder and a catalyst after the mixture is evenly mixed and ensuring the mixture to react under the conditions of continuous stirring and reflux condensation under certain temperature to obtain transparent aluminum alkoxide solution; adding a given quantity of silicon-containing substances and spinning assistants into the aluminum alkoxide to obtain precursor solution of aluminium oxide based fibers and concentrating the solution to obtain precursor sol of spinnable aluminium oxide based fibers; placing the concentrated sol into a liquid storage tank with a spray nozzle and spinning by a dry or wet method to obtain aluminium oxide based continuous precursor fibers containing organics; and drying and sintering the precursor fibers to obtain the aluminium oxide based fibers. The aluminium oxide based continuous fibers prepared by the technology can be used in reinforcement in the composite, further improve the heat resistance and mechanical property of the material and are widely applied in the fields of aerospace, automobile and the like.

The invention discloses a slow-soluble biological antifouling paint, which comprises binder resin, biological antifouling compositions, pigments, fillers, additives and solvents, wherein the biological antifouling compositions are vegetable tannin and tea polyphenols of biological extracts of plants. The vegetable tannin and the tea polyphenols are then encapsulated by employing the encapsulization technology, the encapsulated vegetable tannin and tea polyphenols are taken as the antifouling compositions, the antifouling paint of the invention is further composed by combining the binder resin, the pigments, the fillers, the additives and the solvent together with the vegetable tannin and the tea polyphenols, and the antifouling effect is achieved by the slow releasing of the vegetable tannin and the tea polyphenols from micro-capsules. The invention has the advantages that the invention coming from the biological extracts of plants is environment-friendly, the cost is low, the encapsulization technology is simple, the price of capsule materials is low and the large-scale production is easy to be achieved. Further, the invention is characterized by low surface energy, biological antifouling, long term slow releasing and environment protection, and is capable of being employed in antifouling treatment of ocean ships, ocean fixture and fittings, sewers, cable ducts, optical cable ducts and the like.

The invention relates to a syphilis serological screening or diagnosis method. The purpose is that the method has the characteristics of low price, high speed, sensitivity and specificity. The technical scheme provided by the invention is that: a preparation method of rTpN15-17-47-ELISA for detecting syphilis serum antibodies comprises the following steps in turn: constructing an artificial fusion gene tpN15-17-47 of tpN15, tpN17 and tpN47 and a prokaryotic expression system E.coliBL21DE3Pet42a-tpN15-17-47 by gene technology, purifying the recombinant expression product rTpN15-17-47 as a coating antigen, establishing rTpN15-17-47-ELISA for detecting syphilis serum antibodies. The fusion gene tpN15-17-47 has a nucleotide sequence and an amino acid sequence as shown in sequence table 5.

Relating to plating of metal materials, the invention provides a preparation method of a titanium boride based inorganic composite coating. The mixed powder of micron-sized metal Al powder, micron-sized, submicron-sized or nano-sized TiO2 powder, and micron-sized, submicron-sized or nano-sized B4C powder is taken as a raw material, the mixed powder is sprayed on the alloy underlayer surface of a metal or alloy workpiece surface by thermal spraying. During thermal spraying, the Al, TiO2 and B4C in the mixed powder react with nitrogen in a powder feeding gas to synthesize the titanium boride based inorganic composite coating in situ. The method provided in the invention overcomes the defects of high raw material cost, complicated preparation process, high energy consumption, low efficiency, difficult control of coating processing precision, low coating density, poor coating uniformity, weak binding force between the coating and a substrate, low coating toughness, easy coating cracking, and unsuitability for application in large-scale industrial production existing in the prior art for preparation of titanium boride based composite coatings.

The invention relates to an application of nanocrystalline cellulose serving as a fluid loss additive for a drilling fluid as well as the drilling fluid. The drilling fluid contains the fluid loss additive which adopts the nanocrystalline cellulose. The provided nanocrystalline cellulose serving as the fluid loss additive for the drilling fluid has the characteristic of lower cost as well as excellent fluid loss reduction function.

The invention provides a novel real-time high-precision wave measurement method based on GNSS. GNSS phase, pseudo-range, Doppler frequency shift observation values and broadcast ephemeris are collected through a GNSS receiver (or board card) and an antenna carried by sea surface carriers such as a wave buoy, the three-dimensional speed of the carriers such as the buoy is obtained through epoch difference of the phase observation values, and then element information such as the direction spectrum, the frequency spectrum, the wave height, the period and the wave direction of waves is obtained; the change of displacement along with time is obtained by integrating the speed for a certain time length and removing a linear trend term, and wave element information can be also obtained through solving; and no extra precise differential correction number is needed, so that the service cost and the communication cost of precise differential correction are saved. The method is suitable for offshore and pelagic scenes, high-precision wave element information is obtained in real time and stored in the buoy locally or periodically for communication and return, the working range of GNSS-based ocean wave measurement is expanded, and the method has high practical application value.

The invention relates to a mixer for a mixing plant or building. The mixer comprises a stirring shaft (27) and a first mixing arm (23) with a first mixing blade (24); the mixer is characterized in that the mixer also comprises a second mixing arm (25) with a second mixing blade (26), the mixer can run in a first mode and second mode of production, in the first mode of production, the stirring shaft (27) is connected with the first mixing arm (23) and the second mode of production, the stirring shaft (27) is connected with the second mixing arm (25). The invention also relates to a corresponding mixing plant and mixing building and an operation method of the mixing plant and the mixing building. The mixer, mixing plant and mixing building of the invention can be used to produce concrete andordinary dry-mixed mortar, thus meeting different production requirements well.

The invention provides a method for preparing 4-tert-octylphenol. The C4 fraction addition mixture with 80 percent of isobutene dimer remained by esterification-degasification of sulfuric acid is taken as the raw material ; after the raw material is braized and cut under the temperature between 75 DEG C and 105 DEG C, the isobutene dimmer that the content of the target distillate is more than 98 percent is obtained to be taken as the alkylating agent; Na-type sulfonated styrol-butadiene polymer strong base anion-exchange resin with 50 percent of water is acidified to a H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the alkylation catalyst; the target distillate isobutene dimmer and the phenol are made a alkylation reaction under the temperature between 90 DEG C and 100 DEG C with the H-type sulfonated styrol-butadiene polymer strong acid cation-exchange resin as the catalyst to produce the 4-tert-octylphenol alkylation mixing liquid; the alkylation mixing liquid is braized and cut under the temperature between 220 DEG C and 270 DEG C to produce the 4-tert-octylphenol.

The invention relates to a full-automatic walking type turner. The full-automatic walking type turner is mounted on a compound fertilizer fermentation tank guide rail and mainly comprises a truss, a turning device mounted on the truss, a walking device mounted at the bottom of the truss, a turning driving device mounted on the truss and connected with the turning device, and a walking driving device mounted on the truss and connected with the walking device, wherein the turning driving device and the walking driving device adopt the driving modes that the turning driving device and the walking driving device are respectively transmitted and driven by driving chains of a turning driving motor and a walking driving motor. The automatic walking type turner has the advantages of high fermentation material piling, large turning yield, thorough material turning, large amount of reduced moisture in a fermentation process, stable equipment operation and low fault rate; and multiple turning flow lines can be simultaneously controlled only by a control button without driving equipment in person in the turning process, and thus the utilization rate of workers is high.

The present invention provides terminal roaming supported method in mobile radiated television service. It contains 1, visiting area mobile communication network side receiving terminal sent service authorizing request message, querying whether pre - saving said terminal user encryption key, if it is then executing steps 3 otherwise executing steps 2, 2, visiting area mobile communication network side transmitting user encryption key obtaining request message to attributed area mobile network side, obtaining attributed area mobile network side returned said terminal user encryption key, 3, visiting area mobile communication network side querying said terminal user corresponded order information, according to said user order information, judging whether said terminal user ordering said radiated television program and executing relevant operation. Said invention also provides terminal roaming supported system in mobile radiated television service and supports terminal roaming, service authentication and charging in mobile radiated television service.

The invention provides a production method for synthesizing an aqueous adhesive by using collagen modified by polyurethane and epoxy resin. The method includes: firstly, extracting a collagen hydrolysate from raw materials, such as leftover material of leather manufacturing, bones and the like, which contain the collagen, number-average molecular weight being 10,000 to 30,000; then at 50-80 DEG C,synthesizing an isocyanate-terminated polyurethane prepolymer containing a hydrophilic group and mixing the prepolymer with a certain amount of epoxy resin, and adding a salt-forming agent so as to form salts with carboxylic group; finally, adding deionized water, so that during dispersion and emulsion, the collagen hydrolysate can be subjected to grafting reaction with the polyurethane and epoxyresin, thereby synthesizing the aqueous adhesive based on the collagen modified by polyurethane and epoxy resin. In application, a curing agent and filler are not added, or are added to a certain amount, for adhesion of plywoods. With the leftover material of leather manufacturing being a main production raw material, which is reproducible, the product is free of formaldehyde, has excellent waterresistance and adhesion strength, is low in production cost, and can satisfy the use requirement of II-type plywoods. The production method is simple and is easy to control.

The invention provides a titanium-based beta-MnO2 composite coating anode and a preparation method thereof. The anode comprises a titanium cladding copper conductive beam (1) which is provided with aconductive head (4), a titanium net plate (2) which is welded on the lower surface of a copper conducting beam, and silicon rubber cases (3) which sleeve two ends of the titanium cladding copper conductive beam, wherein the titanium net plate (2) comprises a titanium net base body, a gradient Ru-Ti-Sn-SbOx intermediate layer which coats the surface of the titanium net base body, and a beta-MnO2 composite surface activation layer which coats the surface of the intermediate layer. Compared with a traditional titanium-based heavy metal coating anode, the prepared anode has the advantages that theconductivity is obviously improved under the basis that an electrolytic cell structure, an electrolyte composition and operation regulations remain; the cell voltage can be reduced by 0.1V; the material cost can be decreased by 40%; the current efficiency can be increased by 1-3%; the shortage of high cost of a heavy metal oxide coating is overcome; and the anode can be widely applied to the electrolytic industry.

The invention relates to an integrated flywheel and clutch drive mechanism. A drive body has a big outer circle and a small outer circle; convex-concave teeth are uniformly distributed on the big outer circle of the drive body; friction plates are riveted to the two lateral surfaces of a drive plate; a round hole is formed in the center of the drive plate; concave-convex teeth similar to those on the outer circle of the drive body are manufactured on the inner circular surface of the round hole; the drive plate is clamped on the concave-convex teeth on the outer circle of the drive body through the concave-convex teeth on the inner circle; an air cylinder and a drive plate chamber are manufactured on each of the two sides of the flywheel respectively; the drive plate chambers face to the direction of the drive plate; a flywheel is arranged on the small outer circle of the drive body through a gear shaft; a piston is arranged at the opening part of the air cylinder on one side of the flywheel; the piston is sealed with the air cylinder through an air cylinder inner seal ring and an air cylinder outer seal ring; an adjusting nut is screwed at one end of a pull rod; a rotary air inlet joint is arranged in the center of the head of the drive body; and an air intake pipe and an air exhaust pipe are connected with the inner cavity of the air cylinder and the rotary air inlet joint respectively.

The invention provides a real-time on-line adsorption detection system, which comprises a light source which only allows light to enter a first optical path via a light-transmitting path, an optical filter arranged along the first optical path, a polarizer, a beam transforming unit, an optical splitter, a sample unit, a first detector and a second detector arranged along a second optical path, wherein the first optical path separates from the second optical path at the optical splitter. The system also comprises a control module which is coupled and communicated with the first detector and the second detector for acquiring an adsorption rate of a sample to be detected in the sample unit, wherein the polarizer allows the maximum polarized component in a light beam emitted by the light source to pass, so that the light intensity on the first detector and the second detector is increased. In the system, the light beam with specific wavelength for measurement is selected by combination of the low-cost light source and the optical filter, so that the defect of high cost caused by the selection of the light beam for measurement by the combination of a continuous light source and a raster of the adsorption detection system in the prior art is overcome.

The invention relates to a method for preparing short chain fatty acid through aquatic plant. The method is characterized by comprising the following: a step of preparing solution according to the water PBS buffer fluid volume ratio of 1 to 1-3 and adding crushed dry matter of the aquatic plant into the solution according to the proportion of 5-30g / L; a step of adding feeding fluid with aquatic plant concentration of 5-10g / L into a reactor with sludge concentration of 10-30g / L and operating temperature of 25-45 DEG C at the adding speed of 0.5-2.0L / d and controlling the PH value ranging from 5.5 to 6.5 through baking soda; a step of discharging residue according to the proportion of 0.05-0.25L / d; a step of completing sludge acclimation when methane is not detected in the produced gas; a step of adding feeding fluid with aquatic plant concentration of 10-30g / L; and a step of controlling the PH value ranging from 5.5 to 6.5 until the reactor operates stably with degradation efficiency reaching 55-70 percent to obtain the short chain fatty acid mixed liquid which contains acetic acid, propaneoic acid and butyric acid and can be used as chemical raw material with high value added. The solid residue can be reused as raw material.

The invention provides a method for disposal of solid waste by a ceramsite kiln and a ceramsite kiln for disposal of solid waste. The ceramsite kiln includes a drying kiln and a calcination rotary kiln. The method includes: preparing ceramsite raw materials, which include solid waste; drying and calcining ceramsite, and enabling circulation flow of the generated flue gas along the drying kiln-calcination rotary kiln-drying kiln; cooling and discharging ceramsite; and disposing flue gas and tail gas. Specifically, the solid waste includes at least one of fly ash or organic solid waste; fly ashis selected from the incineration ash of at least one of domestic garbage, industrial waste or medical waste; the organic solid waste is selected from at least one of polluted soil, oily sludge, sludge obtained by chemical plant sewage treatment, medical solid waste or industrial waste residue. The method adopts fly ash and organic solid waste as the ceramsite raw materials, consumes fly ash and organic solid waste in the ceramsite manufacturing process, not only solves the hidden trouble of pollution caused by fly ash and organic solid waste, but also solves the cost problem caused by the limitation of ceramsite raw materials.

The invention discloses a production method for high-performance special-shaped iron-cobalt soft magnetic alloy parts and belongs to the field of magnetic materials. The production method includes: adopting powder particles as raw materials, and placing the raw materials in a high-energy ball-milling machine for ball milling for 1-40 hours prior to evenly mixing ball milling powder with a forming agent so as to enable a mixture of the powder particles and the forming agent to infuse or flow into a mold for formation under good liquidity conditions to obtain green bodies of parts with complicated shapes; removing the forming agent from the obtained green bodies, obtaining pretreating pieces via sintering, and placing the pretreating pieces under high temperature for treatment prior to final heat treatment to obtain final products. An alloy is even in texture and excellent in performance with saturation flux density Bs greater than 2.3T, maximum permeability greater than 5mH / m and coercivity force less than 110A / m, the parts with the final shapes can be directly prepared, resources and energy sources are saved, and manufacturing cost is lowered.

The invention provides a method for producing coniothyrium minitans conidium which takes agricultural wastes as raw materials. The method comprises the following steps: (1) pulverizing and drying the agricultural wastes; (2) preparing a matrix mixture; (3) preparing spore suspension; (4) inoculating; and (5) culturing. In the invention, the coniothyrium minitans conidium is prepared from the agricultural wastes; and after measurement, the final spore yield reaches 1.58*109-6.0*109pcs / g matrixes and has no significant difference with the spore yield by single wheat fermentation. The method overcomes the defect of high cost in the prior art, has very low cost and very good production effect, and can make use of the agricultural wastes.

The invention relates to the field of conductive honeycomb ceramic, and in particular relates to a method for preparing laminated conductive titanium-aluminum-carbon honeycomb ceramic by using element powder in situ and application. The method comprises the following steps: by taking Ti powder, Al powder and graphite powder as raw materials, adding an organic binding agent, a plastic agent and a lubricant, smelting, aging, performing extrusion molding, cutting, drying and performing pressureless sintering in an atmosphere furnace. The heating can be performed in two stages, namely, the heating velocity of the first stage is 2-5 DEG C / minute, and the temperature is kept for 2-6 hours below the melting point Al (600-650 DEG C); the heating velocity of the second stage is 2-5 DEG C / minute, the sintering temperature is 1400-1500 DEG C, and the sintering time is 0.5-3 hours, thereby preparing the conductive titanium-aluminum-carbon honeycomb ceramic. By adopting the method, the defect that the production cost is high when prepared titanium-aluminum-carbon powder is taken as a raw material for preparing the titanium-aluminum-carbon honeycomb ceramic is solved, as the heating procedures are precisely designed, the thermal explosion reaction is effectively avoided, and thus the titanium-aluminum-carbon honeycomb ceramic of regular shapes can be prepared.

The invention discloses a preparation method of high-concentration doxycycline injection adopting a small amount of organic solvent, and relates to a high-concentration doxycycline injection. The high-concentration doxycycline injection contains the following components in percentage by mass: doxycycline, povidone, magnesium chloride, organic solvent and disodium metabisulfite, and has constant volume by adding water for injection. The preparation method comprises the following steps: (1) adding the povidone in a proper amount of water for injection to be heated to a proper temperature and stirred to completely dissolve, thus preparing povidone aqueous solution; (2) dissolving anti-oxidant in the povidone aqueous solution obtained in step 1; (3) then dissolving the magnesium chloride in the solution obtained in step 2; (4) slowly adding the doxycycline in the solution obtained in step 3, reducing the temperature to 15-25 DEG C, and adding and stirring the organic solvent to dissolve completely; and (5) adding ethanolamine, adjusting to be proper, and obtaining the high-concentration doxycycline injection by the steps of constant volume with the water for injection and the like. In the invention, stable high-concentration doxycycline injection can be prepared by using less organic solvent, thus saving the production cost.

The invention relates to a composite activator for preparing high-performance activated carbon, wherein the chemical composition is Na2CO3-nKC1, wherein n=0.5-2, the composite activator can be reducedby a carbide to produce potassium atoms and potassium oxide at 700-900 DEG C, the carbide is activated into activated carbon with a high specific surface area, after cooling, the composite activatoris dissolved and gradually impregnated with deionized water, the composite activator recovered by evaporation of an impregnation solution can be recycled, and the mass loss of the composite activatoris 5% to 15%. The composite activator is suitable for preparing the high performance activated carbon from a carbonaceous raw material having a carbon content of more than 60% and an oxygen content ofless than 30%. The composite activator only overcomes the shortage of high raw material cost of a potassium carbonate activator, but also overcomes the defect that the activation ability of a sodiumcarbonate activator is low, and the composite activator has great economic advantages when used for replacement of the potassium carbonate activator.

The invention provides a hybrid power generation system for a room air conditioner, comprising a photovoltaic solar power generation system connected with an air-conditioning system, wherein the solar power generation system is connected with an internal alternating current power system of the air-conditioning system in parallel through a grid-connected inverter of the solar power generation system, an air conditioner power socket of the air-conditioning system is plugged into a household power system, the household power system is connected with a power utilization load, the household power system is externally connected with the national utility grid through a power meter, the photovoltaic solar power generation system and the national utility grid provide hybrid power for the air-conditioning system in a preferred manner, and residual power generated by the photovoltaic solar power generation system is reversely supplied to the national utility grid. After the hybrid power generation system for the room air conditioner adopts the scheme, the photovoltaic solar power generation system and the internal alternating current power system of the air-conditioning system realize grid connection and supply power to the room air conditioner in a hybrid manner, and the residual power is directly fed to the household power system, so that the purposes of energy conservation and emission reduction are realized.