30results about How to "Simple and repeatable" patented technology

A human body supporting structure, particularly a bicycle saddle, includes a load-bearing shell having a topside designed to face towards a user and an underside designed to face a bicycle frame. The shell includes at least one continuous sheet element having at least one differently deformable portion located at particularly stressed regions of the user's body. The sheet element is formed of a thermoplastic resin matrix with reinforcement fibers embedded therein. The differently deformable portions have a smaller thickness (Si) and a locally greater average density (pi) than the rest of the extension of the shell, said portions are formed in a thermoforming step wherein a local thickness reduction is carried out by compression and by heating said sheet element to a temperature near the melting temperature of the thermoplastic matrix. A method of making such support structure is further provided.

The invention provides a user authentication system based on an oauth2 protocol, which belongs to the field of web user authentication and comprises an authentication center module, a Redis storage module, a user center module, a service gateway and other modules. User authentication of a plurality of micro-service client nodes is realized through the modules, a development mode is simplified while safety and reliability are realized, the safety, efficiency and stability of each node are greatly improved, and the pressure of a server is reduced.

The invention provides a preparation method of a thin film composite film taking a metal organic framework as a functional layer, which comprises the following steps: 1) mixing a metal organic framework mixed solution containing a polyamine with an alcohol to obtain a dispersion solution; (2) spraying the dispersion liquid obtained in the step (1) on a base film by utilizing a spraying technology,so that a uniform metal organic framework layer is formed on the surface of the base film; and 3) spraying a polybasic acyl chloride solution on the surface of the metal organic framework layer prepared in the step 2) by using a spraying technology, and generating a polyamide layer by using an interfacial polymerization reaction to fix the metal organic framework, thereby obtaining the thin filmcomposite film. According to the invention, the spraying technology is applied to the construction of the metal organic framework film composite film; the problems that large-scale preparation of themetal organic framework film composite film is difficult and repeatability is poor are solved, the metal organic framework film composite film with a thin functional layer and excellent dye interception performance can be prepared, and the prepared MOF film composite film has a very high industrial application prospect.

Method for antiforgery marking and authentication of printed products, includes the following steps: printing sample prints with a given printer of an image that is to be associated to a product (P); digitally acquiring the prints, to obtain digital images; processing the images acquired for extracting therefrom one or more intrinsic characteristics identifying the printer used; and incorporating in the printed product (P) an identification marking containing information associated to the printed product and to the characteristics identifying the printer and a print of the image.

The invention provides a LAMP primer composition for detecting hand-foot-and-mouth disease related pathogens and related application thereof. The LAMP primer composition is high in sensitivity and accuracy. Microfluidic chip technology based on a LAMP method is applied in detection of the hand-foot-and-mouth disease related pathogens, and the advantages of high flux, quickness, sensitivity and high specificity of a microfluidic chip are utilized, so that detection speed, flux and sensitivity of the hand-foot-and-mouth disease related pathogens are increased, cost is lowered greatly, and detection time is shortened.

The invention provides a method for enriching and purifying a biological marker compound in a high-postmature soluble organic matter. According to the method, a methanol saturated solution of urea is utilized for complexing and purifying n-alkane in the high-postmature soluble organic matter and simultaneously enriching the biological marker compound. The method comprises the following steps: (a) preprocessing a high-postmature soluble organic matter sample, so as to obtain a saturated hydrocarbon sample; (b) concentrating the saturated hydrocarbon sample to a half-dry state, and adding the saturated hydrocarbon sample into a mixed solution of normal hexane and acetone, so as to obtain a mixed solution B; (c) adding the methanol saturated solution of urea into the mixed solution B while stirring, so as to obtain a solution C; (d) filtering the mixed solution C, so as to obtain filtrate and urea; (e) blow-drying the filtrate, carrying out drip washing by virtue of normal hexane, concentrating the filtrate into an automatic feeding bottle, and carrying out determination by virtue of GC-MS; and (f) dissolving urea with deionized water, carrying out extracting by virtue of normal hexane, concentrating extracted liquid into the automatic feeding bottle, and carrying out determination by virtue of GC-MS.

The invention discloses a preparation method of a WS2/graphene composite aerogel gas sensor. The method comprises the following steps of preparing high crystallinity graphene aerogel, then preparing WS2/graphene composite aerogel, afterwards, preparing WS2/graphene composite aerogel suspension liquid, enabling the WS2/graphene composite aerogel to connect with two sensing electrodes, finally adopting a wire bonding technology to connect a sensing electrode chip onto a package substrate through a circuit to manufacture a sensing device. The WS2/graphene composite aerogel prepared by the preparation method not only maintains the laminar characteristics of two-dimensional materials, but also has a large quantity of cross holes, and still has superhigh effective specific surface area after integrated to the device; the WS2/graphene composite aerogel gas sensor prepared by the preparation method provided by the invention has a good gas-sensitive property at different temperatures and different humidity.

The invention relates to an infrared stealth metal nanoparticle metamaterial composite film compatible with visible light stealth and a preparation method thereof and belongs to the technical field ofinfrared stealth of thin film materials. For the composite film, metal nanoparticles with the size of 5 nm -20 nm are uniformly arranged in an oxide substrate, the size of the metal nanoparticles isuniform, the size change is 1%-5%, and the thickness of the composite film is 20 nm -200 nm. The metal is Al, Ti, Au, Ag, Cu and other metals and an alloy composed of the metals, and the oxide is SiO2, SiO, Al3O2, TiO2 and other non-metal oxides. According to the metal nanoparticle metamaterial composite film prepared by the invention, the size of the metal nanoparticles can be controlled, the gapis adjustable, the arrangement is uniform, and the like; when the thickness is only 200 nm, the reflectivity of the infrared band is up to 99%, and the reflectivity of the visible wave band is as lowas 30%, thereby realizing compatibility of visible light stealth with infrared stealth.

The invention discloses a magnetic nanoparticle composite film and a preparation method thereof, and belongs to the technical field of magnetic material control of film materials. In the magnetic nanoparticle composite film, the composite film is formed by continuously and alternately depositing a magnetic layer and an insulating layer, and the composite film has a thickness of 15-100 nm; and themagnetic layer is a layer film formed by uniformly embedding magnetic particles in an insulating medium, the component of the magnetic particles is Fe or Fe-Ni, the volume fraction of the magnetic particles is 80-95%, and the thickness of the magnetic layer is 1-20 nm; and the insulating layer is composed of an insulating medium and has a thickness of 0.1-10nm. The magnetic nanoparticle compositefilm prepared by the invention can control the merging and grow of the nanoparticles, the particle size and the distribution uniformity and the like, thereby improving the magnetism while realizing grain refinement. The composite film prepared by using the preparation method provided by the invention is particularly suitable for electronic components in the field of digital electronic industry andcommunication technology.

The invention discloses a preparation method of tetragonal-phase barium titanate ceramic powder with antibacterial performance, and belongs to the technical field of ferroelectric and piezoelectric ceramic materials. The method comprises the steps: completing atomic-scale mixing of a barium source and a titanium source in a liquid-phase state by means of a liquid-phase chemical process; then, fixing the mixture in the form of a liquid precursor through a rotary evaporation reaction; and finally, carrying out a certain heat treatment process on the washed and dried precursor, thereby controllably synthesizing the tetragonal-phase barium titanate ceramic powder with good antibacterial performance. In the synthesis process, common inorganic salts and simple reagents are mainly used, so that the method is low in cost, simple and easy to implement and good in repeatability. The synthesized tetragonal-phase barium titanate ceramic powder is stable in component, narrow in size and particle size distribution, high in crystal face index, good in antibacterial performance and suitable for large-scale batch production, and a certain theoretical basis is provided for antibacterial research of ferroelectric materials.

The invention discloses a preparation method of an ambroxol hydrochloride impurity reference substance. The method comprises the following steps: firstly, dissolving ambroxol hydrochloride in an appropriate amount of dichloromethane solution, then adding a quantitative aqueous solution of sodium hydrogencarbonate for uniform stirring to obtain free ambroxol, separating, drying and concentrating the organic phase, dissolving the concentrated solution in the alcohol solution, then refluxing with excess orthoformate to obtain a crude product of (1R, 4R)-4-(6,8-dibromo-3,4-dihydroquinazoline)-cyclohexanol after condensation, and obtaining a pure product after the crude product is purified by silica gel column chromatography. The invention has the creative application of orthoformate as a condensing agent. Compared with other condensing agents reported in the literature, the orthoformate has the advantages such as good stability, high safety, low cost, high product yield and easy purification.

The invention relates to a detecting method for residual amount of bactericide in water and specifically relates to a method for quickly detecting metrafenone in water by adopting a liquid chromatography-mass spectrometry technology. The method mainly comprises the following steps: sample pretreatment, liquid chromatogram separation and mass spectrometric detection. The specific processes of the method are as follows: filtering and purifying a sample; performing HLB column purification; gathering nitrogen; blow-drying and redissolving with acetonitrile water mixed liquor; by adopting SHIM-PACKXRODSII75L*2.0 high performance liquid chromatography as an analytical column, and taking acetonitrile-0.1% formic acid aqueous solution as a flowing phase, performing gradient elution at flow rate of 0.3ml/min; separating and detecting metrafenone in water under the mode of positive ion electrospray ionization and the mode of multi-reaction monitoring; optimizing mass spectrometry conditions andcreating optimal mass spectrometry conditions, thereby achieving the highest sensitivity of metrafenone. The detecting method has the characteristics of simple sample pretreatment steps, high extraction ratio, high accuracy, excellent purifying effect, less detection time consumption and low cost.

The invention discloses a method for preparing mesoporous barium zirconate titanate ceramic nanoparticles, and belongs to the technical field of electronic ceramic materials. According to the method, barium chloride (BaCl2) is adopted as a barium salt, zirconium oxychloride (ZrOCl2) is adopted as a zirconium source, butyl titanate (C16H36O4Ti) is adopted as a titanium source, ethylene glycol (C2H6O2) is adopted as a reaction chelating agent, under the high-concentration alkaline condition, the crystal growth speed is controlled through a rotary evaporation reaction, and the mesoporous barium zirconate titanate nanometer material is successfully prepared. In the synthesis process, common inorganic salts and simple reagents are taken as main components, so that the method is low in cost, simple, feasible, good in repeatability and suitable for large-scale production, and the commercialization process of electronic ceramic materials can be promoted.

The invention discloses a method for preparing a hydroxyapatite nano rod by using an egg white template, and belongs to the technical field of biological ceramic materials. The method comprises the following steps: taking calcium chloride (CaCl2) as calcium salt, diammonium hydrogen phosphate ((NH4)2HPO4) as phosphate and ethanol amine (C2H7NO) as a reaction chelating agent, carrying out rotary evaporation reaction under a high-concentration alkaline condition to obtain an HA precursor solution, washing with water and alcohol, carrying out vacuum drying to obtain HA precursor powder, uniformly mixing and stirring the HA precursor powder and whipped egg white, placing the mixture into a drying oven, drying, and successfully preparing the hydroxyapatite nano rod through high-temperature calcination. In the synthesis process, common inorganic salts and simple reagents are mainly used, so that the method is low in cost, simple and feasible, good in repeatability, high in synthesis performance, good in stability, suitable for large-scale production and capable of promoting the commercialization process of biological ceramic materials.