927 results about "Form solution" patented technology

A method of non- metallocene catalyst loading with high active: the carrier and chemical activating agent reacting with each other to get the modification carrier; dissolving the magnesium compounds into the tetrahydrofuran-alcohol mixing system to form solution, adding the modification carrier into the solution for reaction, filtering, washing, drying and sucting to get the composite carrier; dissolving the non- metallocene catalyst for lkene polymerization into the dissolvent, then reacting with the composite carrier and through process of washing, filtering and drying to get the load non- metallocene catalyst. It can also be: proceeding heating activating treatment before the reaction of carrier with the chemical activating agent; the composite carrier reacting with chemical additive before reacting with catalyst to get the modification composite carrier, the modification composite carrier reacting with catalyst to get the load non- metallocene catalyst. The load catalyst produced in this invention is high active; the load catalyst of high property can be produced with less methylaluoxane; the polyolefine produced with the catalyst prepared in this invention possesses sound granual shape.

A two-stage structure for performing non-linear echo cancellation is described in which a first echo canceller is used to attenuate linear echo components of a microphone signal and a second echo canceller is used to attenuate non-linear echo components of the output signal generated by the first echo canceller. One or both of the echo cancellers may be implemented using closed-form solutions, including a closed form solution for a hybrid method in the frequency domain.

A method of depositing a kesterite film which includes a compound of the formula: Cu2−xZn1+ySn(S1−zSez)4+q, wherein 0≦x≦1; 0≦y≦1; 0≦z≦1; −1≦q≦1. The method includes contacting hydrazine, a source of Cu, and a source of at least one of S and Se forming solution A; contacting hydrazine, a source of Sn, a source of at least one of S and Se, and a source of Zn forming dispersion B; mixing solution A and dispersion B under conditions sufficient to form a dispersion which includes Zn-containing solid particles; applying the dispersion onto a substrate to form a thin layer of the dispersion on the substrate; and annealing at a temperature, pressure, and length of time sufficient to form the kesterite film. An annealing composition and a photovoltaic device including the kesterite film formed by the above method are also provided.

The method of reducing loaded metal catalyst with low temperature plasma includes the steps of: 1) dissolving active metal salt component in deionized water or distilled water to form solution with metal component content of 0.01-20 wt%, filling solution into catalyst carrier, letting stand at room temperature for 8-24 hr and drying at 40-110 deg.c for 2-10 hr; and 2) setting the catalyst between two electrodes of plasma apparatus, introducing inert gas, air or oxygen as plasma discharge gas into discharge tube of pressure of 50-10000 Pa, and applying DC or AC voltage of 100-20000 V across the electrodes to process for 5-200 min. The low temperature plasma contains great amount of electrons, has powerful reducing capacity to reduce metal ion into metal simple substance and has no negative reaction appearing at high temperature. The process is simple, short in reduction time, without need of chemical reductant and environment friendly.

A method of and a system for stabilizing High Voltage Power Supply (HVPS) DC and AC voltages in multi-energy X-ray computed tomography scanners are provided. The method comprises generating filter ratios, computing DC and AC voltages, and feeding back the computed DC and AC voltages to the commanded voltages. The filtered ratios including an air ratio and a copper ratio are modeled as nonlinear functions of the DC and AC voltages. Computing DC and AC voltages include computing an m-ratio and an n-ratio. The parameters of the nonlinear model comprise an exponent parameter and a set of polynomial coefficients. The parameters are determined by a calibration procedure, which performs scanning at different combination of DC and AC voltages. The optimal parameters are obtained through a nonlinear least square minimization, which is solved through a brute force search over the exponent parameter and a closed form solution of the polynomial coefficients. Feeding back the computed DC and AC voltages include comparing the computed voltages with commanded voltages, integrating the difference between the computed voltages and commanded voltages, and adding the integrated voltage differences to the commanded voltages.

The invention relates to a transparent super-amphiphobic surface layer and a layer-by-layer in-situ spraying reaction preparation method. The method comprises the steps of sequentially spraying priming paint solutions and finishing paint solutions on a base body in a layer-by-layer in-situ mode through a spraying gun and by adopting the same spraying technology, sequentially spraying acetic acid water solutions of 1 wt.% and fluorine-silicane solutions of 0.1-2 wt.%, carrying out curing at normal temperature and then obtaining a transparent super-amphiphobic surface. The priming paint solutions are obtained by adding hydrophobic transparent resin and corresponding curing agents into soluble solvents and then dispersing the mixtures ultrasonically until the resin is completely dissolved; the finishing paint solutions are obtained by adding hydrophilic fumed silica into ethyl alcohol and forming solutions ultrasonically. According to the invention, the preparation technology for needed coatings is simple, the spraying technology is easy and convenient to operate, coatings are super-hydrophobic, super-oleophobic and highly transparent, and the application prospect is wide in the fields of solar panels, glasses and automobile windshield glass.

A flow meter and method for determining the corrected flow rate of a liquid falling into a predetermined class of liquids based on its viscosity and density is disclosed. The flow meter comprises a flow sensor for measuring an uncorrected flow rate of the liquid, a temperature sensor for measuring the temperature of the liquid, and a microprocessor for calculating the corrected flow rate based on the liquids predetermined class and the measured temperature. The flow sensor can include a restriction in the fluid flow path, first and second pressure sensors positioned one on each side of the restriction and a temperature sensor. The first and second pressure sensors measure the drop in fluid pressure created by the restriction and the temperature sensor measures the temperature of the liquid. By basing the corrected flow rate calculation on the predetermined class of the liquid, the calculation becomes a closed form solution that is deterministic providing for quick and accurate corrected flow rate calculation. A flow meter according to the present invention can be used in many applications such as, among others, liquid beverage dispensers and variable speed pumps.

A chemically transferred non-chromium Mg-alloy film is prepared through grinding said Mg-alloy, removing impurities, washing with alkali solution for defatting, washing with acidic solution for removing surfacial oxide, removing very thin oxidized film and pickling ash from its surface by fluoric acidic solution, immersing the Mg-alloy in filming solution to obtain phosphate film, and immersing in alkaline aqueous solution at 15-100 deg.C for 3-60 min for closing the pores in the film. Said filming solution is prepared from Mn salt, phosphate, fluoride and water.

This invention provides a process for making microporous membranes from a polymer solution and the membranes therefrom. A thermal assist, such as heating of the polymer solution can be effected subsequent to shaping the solution, such as by forming a film, tube or hollow fiber of the solution under conditions that do not cause phase separation.. In a preferred embodiment, the formed solution is briefly heated to generate a temperature gradient through the body of the formed solution. The polymer in solution then is precipitated to form a microporous structure. The formation of a wide variety of symmetric and asymmetric structures can be obtained using this process. Higher temperatures and / or longer heating times effected during the heating step result in larger pore sizes and different pore gradients in the final membrane product.

The invention relates to the technical field of medicine, in particular to a preparation method of nano-particles of insoluble drugs. The method includes the following steps: (1) dissolving the drugs in a first solvent (good solvent) to form solution, (2) blending the solution with a second solvent (poor solvent) to form premixed suspension, (3) applying energy on the premixed suspension to form the nano-particles, the average effective grain diameter of which is less than 2Mum. By adopting the technology combining micro-deposition and homogenization, the invention suspends the drugs in poor solvent (usually water) in a form of pure nano-crystal, thus solving the problem that solution is difficult to be prepared since the drugs are difficult to be dissolved in water and oil; compared with the corresponding injection for intravenous infusion and the oral preparations such as tablets, capsules, and the like, the preparation method of the invention can lower adverse reaction, reduce toxic and side effect, improve bioavailability, has sustained-release effect and is convenient to be used by patients.

This disclosure relates to real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. Control system that calculates, in realtime, a value of an input impedance of the antenna to match a load in a receiver system, wherein said impedance is calculated directly using a closed-form solution. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.

An exemplary solution-processed thin film transistor formation method of the invention forms solution-processed thin film layers into a transistor structure. During formation, semiconductor portions of the transistor structure are selectively heated via a laser to modify the material state of semiconductor material from a solution deposited material state to a thin film layer material state.

Active medicine daptomycin is mixed with certain amount of sodium hydroxide and pH regulator, the mixture is compounded with injection water to form solution in certain concentration, and the solution is filled into antibiotic bottle and freeze dried for 30-60 hr to prepare loose and water soluble freeze dried preparation. The freeze dried daptomycin preparation for injection has excellent medicine stability and convenience in carrying and clinical application. The preparation is used specially for intravenous injection to treat skin infection with resistance to other antibiotics.

The invention relates to a method for preparing an edible wrapping film, which comprises the steps of preparation of modified solution of fish skin collagen and film formation. The method is characterized in that: the preparation of the modified solution of the fish skin collagen comprises the following steps of: preparing the fish skin collagen into aqueous solution of which the g / ml is 6.67 percent, adding glutamine transaminase, and heating to dissolve at the temperature of between 40 and 50 DEG C; adding 2 percent of solution of chitosan acetate according to a volume ratio of 1-2:1, and heating 30 minutes at the temperature of between 40 and 50 DEG C to prepare the modified solution of fish skin collagen; and adding 20 volume percent of edible plasticizer to prepare film-forming solution, and coating the film-forming solution on a glass plate and drying in a thermostat to obtain the product. By modifying the fish skin collagen by combining the glutamine transaminase with the chitosan, coating and drying, the edible wrapping film is prepared; and the prepared film product has the advantages of high mechanical strength, strong breaking strength, safety, no toxin and edibility, and can replace plastic films or plastic bags to be applied to the fields of foods, medicaments and cosmetics.

The preparation method of nano cerium oxide with high specific surface area includes the following steps: firstly, preparing salt solution A containing cerium ions, adding surfactant F and additive T in said solution to form solution C; using one or more than two kinds of precipitants and making them in water to form solution D; mixing solution C and solution D to make chemical reaction, reaction time is 10-200min, regulating end point pH value of reaction suspension to 5-10 to produce precipitate, stirring said precipitate for 10-100min, filtering, washing and drying said precipitate, igniting said precipitate for 2-10hr at 400-1000deg.C its heating speed is 50-500deg.C for every hour, so that the nano cerium oxide whose specific surface area is greater than 100sq.m / g.

The invention relates to a forming solution for an environment-friendly non-phosphate ceramic film and a preparation method and an application thereof. The forming solution mainly comprises the following substances: 0.5-3.5 percent of film-forming agent and 0.5-3.5 percent of additive, wherein the film-forming agent comprises 20-35 percent of zircon titanium salt, 10-15 percent of stabilizer and the balance of water; and the additive comprises 6-10 percent of coalescing agent, 0.5-6 percent of film regulator, 2-8 percent of chelating agent, 2-8 percent of buffer agent, 0.5-2 percent of cleaning agent and the balance of water. Under a certain process condition, the PH value of the forming solution is regulated to be within 2.5-5.5, and then metal is processed by adopting the impregnating, sprinkling and other methods, so that a layer of purple blue ceramic film with variable thickness can be formed on the surface. The preparation technology of the ceramic film can be implemented at ordinary temperature, the treatment is convenient, phosphate, nickel, manganese and other contamination ions, as well as waste residue precipitation, are avoided in the preparation process, and the preparation technology is a new environment-friendly and energy-saving ceramic film synthesizing method.

The present invention relates to metered mixing technology for producing a film type product having improved taste-masking properties of a drug substance. In one aspect, a film-based product and a process for making the product are provided wherein a drug substance coated with a taste-masking substance and a film-forming solution are suitably combined and mixed yet the contact time between the components is controlled such that a bitter taste quality is not sensed by a person ingesting the product.

The invention discloses a full-duplex unmanned aerial vehicle mobile relay system based on minimization of outage probability and a path optimization method thereof. The full-duplex unmanned aerial vehicle mobile relay system based on the minimization of outage probability comprises a single antenna source node, a single antenna destination node and a single antenna unmanned aerial vehicle mobilerelay node; wherein the unmanned aerial vehicle mobile relay node operates in a full-duplex decoding and forwarding mode, flies according to a certain path within a specified flight time, and forwardsthe information of the source node to the destination node. The path optimization method establishes a mathematical model considering the flight speed constraints of the unmanned aerial vehicle, taking the unmanned aerial vehicle flight path as the optimization variable, and aiming at minimizing the total interruption probability of the system. The path optimization method uses the first order Taylor series expansion manner to transform the original optimization problem into a standard twice constrained quadratic programming problem, and then solves with the Lagrangian duality theory and thesubgradient method to obtain a closed form solution of the optimal flight path of the unmanned aerial vehicle relay node, which satisfies the minimization of the outage probability.

The invention discloses a making method of high-full trans-beta-carotene agent, which comprises the following steps: setting the weight rate of beta-carontene, combined antioxidant and solvent with emulsifier at 1:0.01-0.1:50-500; dissolving the mass into water to form solution under 30-60 deg.c; adding into high-speed stirring alcohol or isopropanol at spraying pattern; making beta-carontene to evolve at amorphous starch powder with size less than 2um; filtering; adding filtering pie into auxiliary water protected by gel in advance; emulsifying; removing residual solvent; spraying; drying; obtaining the product with antioxidant A and B.

The invention provides a magnesium alloy chemical conversion film forming solution, wherein the film forming solution is a water solution containing ceric sulfate, sulphuric acid, phytic acid, an inhibiter and a buffering agent and has a pH value between 2 and 6. The invention further provides a method for preparing the magnesium alloy chemical conversion film. The chemical conversion film obtained by the film forming solution and the method for preparing the magnesium alloy chemical conversion film has high adhesive attraction of the paint film, good corrosion resistance and wearing resistance, good compactability of the film and low electric resistance.

The invention provides a preparation method of a perovskite quantum dot / polymer composite fluorescent film. The method comprises the following steps that S1, perovskite raw material ingredients and polymer ingredients are dissolved in an organic solvent to obtain a film forming solution; S2, a substrate material is coated with the film forming solution; S3, the substrate material coated with the film forming solution continuously passes through a plurality of temperature regions to be heated; the perovskite quantum dot / polymer composite fluorescent film is generated. The preparation method provided by the invention has the advantages that a multi-section heating drying mode is used; the fluorescent quality of the quantum dot optical film can be better controlled; the method can be used for continuously and industrially producing the composite fluorescent film; the production flow process can be obviously simplified; the production efficiency is improved; the cost is reduced.

The invention discloses a self-assembly method for a high-load inorganic nano particle hybridized organic membrane, which belongs to the technical field of membranes. The method comprises the following steps of: preparing membrane-forming solution from polycations and polyanions respectively, adding amphoteric oxide nano particles respectively, and adjusting pH values; performing ultrasonic treatment and centrifugation, and replacing solvents to prepare polyion nano particle envelope solution; impregnating a substrate or a basal membrane in the polyion nano particle envelope solution or performing dynamic filtration to form a membrane layer, and performing washing and blow-drying; impregnating the substrate or the basal membrane in the polyion nano particle solution loaded with opposite charges; performing the washing and the blow-drying; and repeating the membrane-forming, the washing and the blow-drying to form an inorganic nano particle hybridized polyelectrolyte membrane. The method has the advantages of hybridizing a polycation layer and a polyanion layer with the nano particles, improving the charge numbers of the nano particles in the double layers and effectively overcoming the defect of easy stripping of organic and inorganic layers of the prepared membrane during hybridization.

Crystalline scintillator materials comprising nano-scale particles of metal halides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In these methods, ionic liquids are used in place of water to allow precipitation of the final product. In one method, the metal precursors and halide salts are dissolved in separate ionic liquids to form solutions, which are then combined to form the nano-crystalline end product. In the other methods, micro-emulsions are formed using ionic liquids to control particle size.

The invention discloses a method for synthesizing a silicoaluminophosphate molecular sieve by utilizing crystallization mother liquor, which comprises the following steps: 1) mixing an aluminum source with deionized water for forming suspension A, or mixing the aluminum source with the crystallization mother liquor for forming the suspension A; 2) mixing a phosphorus source with the deionized water for forming solution B, or mixing the phosphorus source with the crystallization mother liquor for forming the solution B; 3) mixing the suspension A with the solution B, and then adding a template agent, a silicon source, crystal seeds and the crystallization mother liquor for forming initial gel mixture; 4) placing the initial gel mixture in a crystallization kettle for hydrothermal crystallization, and then filtering for obtaining a filter cake and filtrate; 5) washing the filter cake, then drying and then calcining for obtaining the silicoaluminophosphate molecular sieve; and 6) recovering the filtrate, sealing and preserving. The method can reduce the using quantity of the template agent, realize zero emission of the crystallization mother liquor, and simultaneously regulate the grain size and the acid strength of the silicoaluminophosphate molecular sieve by fully utilizing the crystallization mother liquor.

The invention discloses a polyvinylidene fluoride (PVDF) based micro-pore film and a preparation method thereof. The polyvinylidene fluoride based micro-pore film comprises a polyvinylidene fluoride micro-pore film provided with a supporting layer in the middle and a low-surface-energy substance coating on the surface of the polyvinylidene fluoride micro-pore film. The preparation method comprises the following steps: selecting two types of polymers, wherein one is polyvinylidene fluoride; dissolving the two polymers into a solvent system to prepare a polymer solution; adding a pore-forming agent into the polymer solution; after uniformly stirring, standing and de-foaming to obtain a film-forming solution; immersing the supporting layer into the film-forming solution to obtain a primary micro-pore film; dissolving and etching the other polymer from the primary micro-pore film to obtain a primary PVDF based micro-pore film; immersing the primary PVDF based micro-pore film into a finishing solution containing the low-surface-energy substance and drawing out from a roller to obtain the PVDF based micro-pore. The film-forming solution is prepared by selecting two types of the incompatible polymers and the surface of the porous film is coated with the low-surface-energy substance, so that a microcosmic rough structure is formed on the surface of the micro-pore film and the super-hydrophobic effect is achieved.

Provided are therapeutic implants comprising renal tissue encapsulated within a polymer bead. Also disclosed are methods for treating a disease state in a subject comprising implanting within said subject a therapeutic implant comprising renal tissue encapsulated within a polymer bead. Also provided are methods for making a therapeutic implant comprising: providing renal tissue; mixing the renal tissue with a solution comprising a polymer, thereby forming a tissue-polymer suspension; extruding the tissue-polymer suspension into an bead-forming solution, thereby forming a therapeutic implant comprising beads of said polymer within which the renal tissue is encapsulated.

The invention belongs to the field of composite catalyst synthesis, and particularly relates to a preparation process for synthesizing a catalyst for low-carbon olefin by a carbon dioxide hydrogenation one-step method. The process comprises the following steps of: (1) selecting heteroatom boron source, aluminum source, silicon source, phosphorous source, R, copper source, zinc source, zirconium source and deionized water as raw materials, and dissolving the aluminum source into water to prepare A, wherein the R is a template agent; (2) dripping the phosphorous source into the A to form solution B; (3) slowly dripping the silicon source into the solution B to form solution C; (4) dripping the heteroatom boron source into the C to form solution D; (5) adding a directing agent and a CuO-ZnO-ZrO2 catalyst into the solution D, and adding the R into the solution; and (6) filling the solution into a reaction kettle, and performing crystallization, filtration, washing, drying and baking to obtain a target product. The process simplifies the flow, reduces the equipment, and has low investment cost.

The invention provides a tea polyphenol-containing chitosan-minced fillet protein composite film used for food package and a preparation method thereof. The composite film is prepared by the following method: dissolving chitosan and minced fillet protein in an acidic aqueous solution, adding glycerol and tea polyphenol, stirring to obtain a chitosan-minced fillet protein film-forming solution, keeping the temperature of the film-forming solution at 30-80 DEG C for 10-60 minutes, and centrifuging for 20 minutes at the speed of 3000rpm; uniformly pouring the solution into an organic glass plate frame, drying to form the film at the film-forming temperature of 20-60 DEG C, wherein the film-forming time is 6-24 hours; and stripping the film to obtain the tea polyphenol-containing chitosan-minced fillet protein composite film. The tea polyphenol-containing chitosan-minced fillet protein composite film has the beneficial effects that the composite film is edible, biodegradable and pollution-free and has a good mechanical performance, barrier property and oxidation resistance.

The invention relates to a ZnO loaded mesoporous mpg-C3N4 composite photocatalyst and a preparation method thereof. The method comprises the following steps: weighing mpg-C3N4 powder, ultrasonically dispersing the mpg-C3N4 powder into ethylene glycol, and stirring; weighing Zn(CH3COO) 2.2H2O, ultrasonically dissolving Zn(CH3COO)2.2H2O into ethylene glycol, adding the solution into the dispersion liquid, and stirring; weighing sodium hydroxide, dissolving the sodium hydroxide into ethylene glycol, adding the ethylene glycol solution into the formed solution and stirring; heating the finally-obtained solution in a solvent at a temperature of 160 DEG C for 24 hours; and centrifuging, washing and drying the obtained precipitate to obtain the ZnO loaded mesoporous mpg-C3N4 composite photocatalyst. The ZnO loaded mesoporous mpg-C3N4 composite photocatalyst provided by the invention has excellent pollutant catalytic degradation functions of visible light and simulated sunlight; the preparation method provided by the invention is cheap in raw materials and simple in process, thereby effectively reducing the product cost, expanding the light absorption range by the composition of the two components, improving the utilization rate of sunlight and having very high practical value and application prospect.