319results about How to "Will not damage the structure" patented technology

The invention relates to a method for performing amino functionalizing on a carbon fiber surface. The method comprises the steps that the fiber surface is coated with a copolymer coating containing a large amount of active amino by utilizing a Michael addition and Schiff base reaction of dopamine and poly-amino molecules through a one-step solution dipping method. Compared with the prior art, the method is simple in technology and mild in condition, does not damage a fiber body structure and can effectively increase active groups of the carbon fiber surface, and therefore the interface bonding property between fiber and resin is improved.

The invention relates to an electrically conductive composite fiber containing carbon nanotubes and a preparation method of the fiber. The electrically conductive composite fiber containing the carbon nanotubes comprises the components of the carbon nanotubes, dispersant polymer and matrix polymer. The preparation method comprises the following steps: mixing and stirring the carbon nanotubes, resin slices of the dispersant polymer and slices of the matrix polymer; then fusing, filtering, spinning, cooling and molding by using a double-screw extruder; and preparing the electrically conductive composite fiber through stretching and thermal forming. The electrically conductive composite fiber containing the carbon nanotubes prepared by the method has the advantages of being high in content of carbon nanotubes, good in dispersivity, high in electrical conductivity, simple in manufacturing technology, low in cost, and the like.

The invention discloses a method for finishing fabric through plant essential oil thermosensitive liposomes. The method comprises the following steps: mixing and stirring tea tree essential oil, menthol and artemisia vulgaris oil to obtain a natural fragrant antibacterial agent; dissolving the natural fragrant antibacterial agent in a phosphate buffered solution; mixing natural phosphatide, phosphatidylcholine, glyceryl phosphatide, phosphatidyl ethanolamine, phosphatidylserine and phosphatidic acid, adding cholesterol, dissolving the mixture into chloroform, pouring into a container, and evaporating at the room temperature until a layer of uniform thin film is formed on the container wall; adding the phosphate buffered solution of the natural fragrant antibacterial agent into the container coated with the thin film in ultrasonic water bath, and performing ultrasonic oscillation to obtain a thermosensitive liposome suspension liquor; adding an adhesive into the thermosensitive liposome suspension liquor, and stirring at the room temperature until the adhesive agent is completely dissolved, so as to obtain a thermosensitive fragrant antibacterial finishing agent; immersing and rolling fabric into the finishing liquid, immersing and rolling for the second time, and finally finishing and shaping the fabric by adopting a freezing and drying method.

The invention provides MXene / sodium alginate derived carbon three-dimensional aerogel as well as a preparation method and application thereof. The preparation method of the MXene / sodium alginate derived carbon three-dimensional aerogel, provided by the invention, comprises the following steps: carrying out liquid-phase mixing on an MXene dispersion liquid and a sodium alginate aqueous solution toobtain an MXene / sodium alginate mixed solution; adding a calcium chloride solution into the MXene / sodium alginate mixed solution, and gelatinizing sodium alginate to obtain MXene / sodium alginate hydrogel; carbonizing sodium alginate through high-temperature treatment, and then washing with 1-3mol / L hydrochloric acid and deionized water to obtain the MXene / sodium alginate derived carbon three-dimensional aerogel material. The MXene / sodium alginate derived carbon three-dimensional aerogel material provided by the invention has good electrochemical performance when used in the field of supercapacitors.

The invention relates to a method for preparing Fe3O4 magnetotactic bacterial cellulose spheres. The method comprises the following steps of: preparing nanoscale Fe3O4 (with superparamagnetism) by a coprecipitation method; sterilizing the nanoscale Fe3O4 and a fermentation culture medium respectively and mixing; inoculating gluconacetobacter xylinum (CGMCC No. 2955); controlling the rotate speed of a shaker and culture time to obtain magnetotactic cellulose spheres with different diameters; immersing and washing the magnetotactic cellulose spheres in flowing water for one hour to remove the residual thalli and the culture medium; and washing by using deionized water for five times (the using amount of deionized water every time is 500 milliliters). Due to inconsistent diameters of the magnetotactic bacterial cellulose spheres formed by fermentation, the magnetotactic bacterial cellulose spheres with required diameters can be screened out by using a screen plate with a certain bore diameter, and Fe3O4 particles are distributed uniformly and wrapped in the bacterial cellulose spheres layer by layer along with the biosynthesis and secretion of bacterial cellulose (BC). The magnetotactic bacterial cellulose spheres can be used as a vector of immobilized enzyme or cells, and have the advantage that: after a reaction is finished, the magnetotactic bacterial cellulose spheres are separated by a magnetic field, and can be used repeatedly after the magnetic field is removed.

The invention relates to a preparation method of sterol ester and in particular relates to an enzymatic synthesis method of phytosterol ester / phytostanol ester by utilizing ultrasonic enhancement. The method is characterized by comprising the following steps: 1) preparing a heterogeneous enzyme reaction system: weighing the phytosterol ester / phytostanol ester and fatty acid at a molar ratio of 1:(1.2-2), adding a reaction solvent, and adding enzyme and a molecular sieve; 2) performing enzymatic esterification with ultrasonic assistance: immersing an ultrasonic probe in a reaction solution, opening an ultrasonic wave generator, constantly radiating with ultrasonic wave for 0.5 to 3 hours under mechanical stirring, and continuously reacting for 4 to 10 hours under mechanical stirring after the radiation is completed; and 3) removing the fatty acid with ultrasonic assisted saponification to obtain the product. According to the method, the enzymatic esterification reaction time can be remarkably shortened, the usage of enzyme can be reduced, and the saponification speed of excessive fatty acid can be accelerated, so that the efficiency of separation and purification can be improved, and the obtained phytosterol ester / phytostanol ester product has the characteristics of light color, high purity and safety without contamination.

The invention relates to a method of preparing ultrahigh molecular weight polyethylene fiber through gel spinning method. The method comprises the following steps: (1) preparing gel protofilament of ultrahigh molecular weight polyethylene; and (2) processing the gel protofilament through extracting, drying and hot drawing to obtain the ultrahigh molecular weight polyethylene fiber. The method is characterized in that the method also comprises the step of pre-drawing the gel protofilament obtained in the step (1) before the step (2), wherein the pre-drawing time is 2.2-24 times and the total hot drawing time in the step (2) is 30-45 times. The method of the invention can be used to obtain ultrahigh molecular weight polyethylene fiber product with low size and high breaking strength and the production cost is low.

The invention discloses a magnetic kieselgur based absorbent, and a preparation method and an application thereof. 1 to 10 percent of hydrochloric acid solution is adopted for performing pretreatment on kieselgur firstly, suction filtration and drying is performed on the kieselgur, then physical pre-modification of the kieselgur is performed through a plasma, then a ferrous ion solution is adopted to soak the kieselgur for realizing modification, alkali is added for adjusting the pH value to generate a magnetic precursor, and then the magnetic kieselgur based absorbent is prepared through suction filtration, stoving, roasting and grinding. The modified kieselgur provided by the invention has remarkably improved adsorbability, has a favorable adsorbability to substances difficult to degrade, meanwhile has a greater magnetic property, can realize solid-liquid separation of treated wastewater conveniently, and enables the reutilization of the kieselgur to be more convenient.

A board machine comprises a forming section where a lower wire loop (11) forms a fourdrinier-wire section (Tl) at the beginning of which is located a forming board (200) which consists of at least one stationary, non-pulsating forming shoe (210). In the forming shoe (210), there is a cover (211) provided with thorough holes (212), setting against the inner surface of the lower wire loop (11). A first headbox (100), which is a multi-layer headbox, feeds a pulp suspension jet onto the forming shoe (210). The board machine further comprises a press section (Pl) where a surface (Wa) of the web (W) having been against the lower wire loop (11) is pressed against a smooth surface, a dryer section (Dl) where the web (W) is dried with at least one cylinder-dryer group and a coating section (400) where at least the surface (Wa) of the web (W) having been against the lower wire (11) is coated.

The invention discloses a high-speed train logistics intelligent loading and unloading system based on AGV trolleys, and the high-speed train logistics intelligent loading and unloading system is arranged on a platform (1). A container storage warehouse (2) is arranged on one side of the platform (1), a train is arranged on the other side of the platform (1), a plurality of containers (4) are arranged in the container storage warehouse (2), a plurality of AGV trolleys (5) are arranged between the container storage warehouse (2) and the train, and a plurality of container loading facilities (7)and a plurality of container unloading facilities (8) are arranged on the side, close to the train, of the platform (1). The invention further discloses a high-speed train logistics intelligent loading and unloading method based on the AGV trolleys. According to the intelligent loading and unloading system, the intelligent loading and unloading facilities are used, the speed is higher, loading operation and unloading operation are carried out at the same time, efficiency is higher, multi-line multi-loading-and-unloading-facility parallel treatment is carried out, more safety and reliability are achieved, at least two sets of automatic carrying trolleys are arranged, and it can be guaranteed that at least one loading or unloading carrying trolley always stays in a loading and unloading waiting zone for waiting operation.

The invention discloses a thin film arranged on a substrate and a preparation method of the thin film. The thin film comprises a substrate layer and a thin film layer, wherein the thickness of the thin film layer ranges from 10*103 nanometers to 30*103 nanometers, and the thermal expansion coefficients of the base layer material and the thin film layer material are different. The preparation method includes the steps of preparing the thin film layer on the substrate of the same material, wherein a sacrificial layer is arranged between the thin film layer and the substrate of the same material; bonding the thin film layer on the target substrate, removing the sacrificial layer, and obtaining the thin film layer on the target substrate. When the expansion coefficient difference of the substrate material and the thin film material is large, the thin film layer which is uniform in film thickness and low in defect density is formed, and the thickness of the thin film reaches the nanometer grade; by means of the thin film prepared on different materials, compatibility of production processes and production lines of various materials can be achieved, semiconductor devices and thin film devices of the substrate material can be integrated, the machinable property of the thin film material is improved, and novel devices excellent in performance are produced.

The invention discloses an extraction and purification method of polysaccharide from Polygonatum kingianum, comprising the following steps: degreasing crude powder of a Polygonatum kingianum medicinalmaterial, carrying out water extraction for three times (40 min for each time), mixing filtrates, carrying out reduced pressure concentration at 60 DEG C to 1: 1.5, and carrying out alcohol precipitation for two times; mixing precipitates, and freeze-drying to obtain crude polysaccharide from Polygonatum kingianum; preparing a 0.3-0.5 g / mL solution by the use of the crude polysaccharide from Polygonatum kingianum, and carrying out depigmentation by loading the solution into D-101 macroporous resin; removing protein in the crude polysaccharide from Polygonatum kingianum by an isoelectric pointmethod; and carrying out dialysis by placing the protein-removed crude polysaccharide solution into a dialysis bag. By the method of the invention, polysaccharide in Polygonatum kingianum can be extracted effectively, impurities such as pigment, protein, micromolecular substances and the like in polysaccharide can be more thoroughly removed, and the structure of polysaccharide will not be damaged. In addition, use amount of an organic reagent is reduced, and polysaccharide purity is raised. The invention is an innovation of a purification method of polysaccharide from Polygonatum kingianum.

The invention discloses a method for improving corrosion resistance of a neodymium-iron-boron magnetic body. The method comprises the following steps: degreasing; performing first ultrasonic water washing; derusting; performing second ultrasonic water washing; performing surface conditioning; performing medium and high temperature phosphating, wherein the pH value of a phosphating solution is 2-4, the concentration of the phosphating solution is 8-20%, the temperature is 60-80 DEG C, and the phosphating time is 10-30min; performing medium and high temperature pure water washing, wherein the temperature of medium and high temperature pure water is 60-90 DEG C, the water washing time is 30-120s, and the electric conduction of the medium and high temperature pure water is not more than 50us / cm; passivating; performing normal temperature pure water washing; drying; soaking in an anti-rust agent, wherein the neodymium-iron-boron magnetic body after drying at normal temperature is soaked in the anti-rust agent with the concentration of 100%, and the soaking time is 10-40min; and carrying out blow drying or drying. The method has the advantages that the anti-rust agent is permeated into a phosphating layer, and a dense corrosion-resistant layer with an anti-oxidation function is formed on the neodymium-iron-boron magnetic body; compared with a traditional way of combining a pretreatment process with a roll-spraying process in the prior art, the corrosion resistance of the product is greatly improved.

The invention belongs to the technical field of antibacterial materials, and discloses a non-dissolution type long-acting antibacterial protective non-woven fabric and a preparation method and application thereof. The preparation method comprises the following steps that antibacterial liquid is evenly sprayed on a non-woven fabric or the non-woven fabric is soaked in the antibacterial liquid, andorganic silicon molecular polymerization is carried out to enhance the binding force of non-woven fabric fiber and antibacterial active substances; and high-temperature setting is performed, and the antibacterial active substances such as ammonium salt and nano-silver are loaded on the surface of the non-woven fabric in a directional mode to prepare the antibacterial protective non-woven fabric, wherein the antibacterial liquid comprises nano-silver gel, quaternary ammonium salt, organic silicon, an auxiliary agent and water. According to the method, the high-activity quaternary ammonium saltand the nano-silver are loaded on the surface of the non-woven fabric fiber to form an ultra-thin positively charged antibacterial layer through chemical bonding of the organic silicon on the surfaceof the polymer fiber, the structure of the non-woven fabric fiber is basically not damaged, the good air permeability is maintained, meanwhile, the rejection rate of the protective non-woven fabric can be remarkably improved, and masks prepared from the non-woven fabric can be repeatedly used.

The invention provides a system for searching and positioning articles. The system comprises an electronic label attached to an article, a label reading device used for reading the electronic label and a server. The server communicates with the label reading device through a network in an online manner. The label reading device is used for searching and positioning the article in a preset range, and judging position information of the article through signal intensity sent by the detected electronic label of the object. The position information is sent to the server through the network in an online manner. The server carries out operation on a database and additionally adds the position information based on the original data format of the database. According to the invention, a required article can be effectively found in multiple articles and distance and positions of the articles can be determined according to signal intensity parameters. The position information can be added to a check result without damaging the original data format of a client.

The invention provides a method for purifying asiatic acid in asiatic pennywort herb. The method comprises the following steps of: adding a biological enzyme into an asiatic pennywort herb medicinal material serving as a raw material for performing natural enzymolysis; extracting a zymolyte with 70-99 percent alcohol solution for 1-3 times; recovering ethanol from an extracting solution under reduced pressure; adding petroleum ether into a concentrated solution for degreasing; dissolving a crude extract and adding macroporous resin for mixing; loading onto a macroporous resin column with a dry method; eluting with ethanol solutions of different concentrations; concentrating and crystalizing; refluxing, dissolving and recrystallizing a crystal with methanol and acetone; and drying to obtain a product. The method has the advantages of easiness for process operation, resin recyclability, and high content, high yield and low cost of the obtained product, and is suitable for industrial production.

The invention discloses a movable cold storage for solving the problems of poor heat preservation effect of an insulation board and trouble for manufacturing of a common cold storage in the prior art. The movable cold storage comprises a plurality of insulation boards; the insulation boards are sequentially connected to form a closed space; every two adjacent insulation boards are in inserted connection; one of every two insulation boards is fixedly provided with a convex plastic part produced by extrusion and the other one of every two insulation boards is provided with a groove in fit with the convex plastic part; the inner surface of each groove is fixedly provided with a sunken plastic part produced by extrusion; the tail end of each convex plastic part is provided with limiting outer inclined planes which are convex towards both sides of the convex plastic part; the inner surfaces on both sides of each sunken plastic part are respectively provided with limiting inner inclined planes which are convex inwards; and when the limiting outer inclined planes are matched with the corresponding limiting inner inclined planes, the tight fit is implemented between the surfaces of every two corresponding insulation boards. Not only does the movable cold storage have a simple process and is convenient for mass production, but also the insulation board structures cannot be damaged and the heat preservation effect is good; and the movable cold storage is very convenient to manufacture and assemble.

The invention discloses injectable modified HA (hyaluronic acid), a preparation method for the same and a composition. -OH in -COOH in an HA structural unit is partially substituted by a group shown in the original document, and the substitution rate is not lower than 40 percent. The modified HA can be directly reacted with chitosan to form hydrogel without chemical cross-linking reaction and damage to the structure of the HA. Rheodynamic experiments show that AHA-CS can be prepared into injection, and the formed hydrogel is stable in structure. Animal experiments show that the AHA-CS hydrogel has the effects of accelerating the healing of wounds and promoting cell proliferation and keratinocyte migration. Histological detection for the wounds treated by the hydrogel also proves that the hydrogel has the effect of promoting the formation of granulation tissues and capillaries. The expression of MRNA (messenger ribose nucleic acid) such as a VEGF-A (vascular endothelial growth factor), an SDF-1 (stromal-derived factor-1) and MMPs (matrix metalloproteinases) at the wounds treated by the hydrogel is increased or upregulated. Significantly, new hair follicles are found on the wounds treated by the hydrogel.

The invention provides a neural network-based cable life prediction method. The method comprises the steps of training a neural network by adopting temperature, humidity, pressure and voltage information in a cable application environment as variables; after the neural network for cable life prediction is established, inputting temperature, humidity, pressure and voltage information of a to-be-detected cable environment; and performing calculation by the neural network to obtain a life prediction value of a cable, thereby performing assessment on a current usage condition and residual life of the cable and providing a reference for cable replacement. A cable life prediction model is built by adopting the neural network, so that the deficiencies of a conventional cable life detection method are overcome, the cable structure is not destroyed, an assessment result is small in deviation, and a detection result is accurate. The reference is provided for the cable replacement, tedious cable replacement processes are reduced, material waste can be reduced, costs can be lowered, accident hidden danger is reduced, and disasters such as a fire and the like due to the cable are reduced.

The invention provides carbon nanotube paper and a making method thereof. The making method of the carbon nanotube paper comprises the steps that a carbon nanotube is mixed with an activating agent, subjected to ultrasonic concussion, and stirred to form suspension liquid of the carbon nanotube firstly; then the suspension liquid is washed, filtered by a magnetic filter, and subjected to continuous heating finally, so that the tightly arranged carbon nanotube paper with a carbon nanotube structure and an undamaged shape is obtained. The carbon nanotube paper has the characteristics of integral structure, uniformity and tightness in arrangement, high electrical conductivity, good mechanical strength and the like; the shape, the size and the thickness of the carbon nanotube paper can be controlled through controlling a raw material ratio, so that different carbon nanotube paper meeting requirements is made. The carbon nanotube paper can serve as anode materials of a super capacitor and a Li ion electrode, and electrode materials in a nanofiltration membrane, a sensor and electrochemical synthesis, thereby having a good application prospect.

Disclosed is a manner of execution of a webpage scripting language. The process includes a first step of carrying out a webpage scripting language main function. When a first function of the webpage scripting language main function is carried out, a mark of the first function is obtained. The process includes a second step of constructing a second function according to a marked code. The process includes a third step of carrying out the second function after setting time is reached. The manner of execution and a device of the webpage scripting language calls the first function in the process of the implementation of the webpage scripting language main function, and unexecuted codes of the webpage scripting language main function are constructed to the second function through the first function, and therefore the unexecuted codes of the webpage scripting language main function are enabled to be executed in a suspending mode. After the setting time is reached, the suspend execution of the webpage scripting language is flexibly achieved by a manner that the unexecuted codes of the webpage scripting language main function are executed through the second function. The structures of original codes are not destroyed, and controlling the whole implementation process in the webpage scripting language is easy.

The invention relates to a packaging method for a double-sided HIT busbar-free battery sheet, which mainly includes: laying a 10-80 μm-diameter plated battery on a self-made or outsourced busbar-free HIT battery sheet with once-printed thin grid lines. Copper wire with metal anti-oxidation layer; when the height of the thin grid wire is greater than the diameter of the copper wire, first lay the copper wire in the direction perpendicular to the thin grid wire, and the contact point between the copper wire and the grid wire is a node, and the heat and pressure sensitive After the glue or photosensitive glue is covered on the copper wire and the battery sheet along the direction of the copper wire, the colloid is cured; when the height of the thin grid line is less than or equal to the diameter of the copper wire, a circular pattern is pre-dotted at the junction of the copper wire and the grid line The cured conductive paste or conductive tape is pasted, copper wire is laid, and hot-pressed and cured below 200°C; then the copper wire and the cell are hot-pressed to complete the packaging of the double-sided busbar-free HIT cell. The invention greatly reduces the amount of silver paste used, reduces production costs, and solves the problem of poor weldability of batteries.

The invention discloses a test device for simulating tire bursting, comprising: a cylinder body, which is provided with a plurality of first through holes; a cover body, arranged above the cylinder body, and the cover body and the cylinder body There is a pressure-holding space between the bodies, and the cover can move up and down relative to the cylinder to seal or open the pressure-holding space; a mounting plate is used to fix the cylinder and drive the cylinder; the mounting plate A plurality of through grooves are opened along its radial direction, and a plurality of said through grooves can be arbitrarily formed into at least two groups of through grooves for adapting tires of different specifications; The expansion and contraction of the cylinder and the collection of tire pressure parameters. In this application, a plurality of first through holes are set on the cylinder to connect the pressure holding space and the inner cavity of the tire. The air pressure of the tire cavity makes the tire inner cavity depressurize more quickly, so that the simulated tire blowout process is more realistic.

The invention provides a preparation method of a binary load-type TiO2 / nano-iron / SBA-15 catalyst. The method comprises the following steps: preparing butyl titanate hydrolysis buffering liquid; preparing a load-type TiO2 / SBA-15 catalyst; and preparing the binary load-type TiO2 / nano-iron / SBA-15 catalyst, i.e. the black binary load-type TiO2 / nano-iron / SBA-15 catalyst, and sealing and storing the catalyst under an oxygen-free condition. The preparation method has the effects that a Si-O-Ti bond, which is formed in the preparation process of the binary load-type TiO2 / nano-iron / SBA-15 catalyst, can effectively improve the load firmness of the TiO2 in an SBA-15 molecular sieve duct, and the structure of a molecular sieve is not damaged in the loading process. Meanwhile, the collapse and shrinkage of the duct can be avoided, the large-specific-surface-area mesoporous structure of the load-type TiO2 / SBA-15 catalyst can be maintained, and the specific surface area can reach up to 300 m<2> / g above. The compounding of a photon-generated carrier can be alleviated to a certain extent, and the photo catalytic efficiency can be improved by more than 55 to 77 percent.

The invention discloses a multilayer through-hole high-permeability polymer micro-filtration membrane. The multilayer through-hole high-permeability polymer micro-filtration membrane comprises a polymer micro-filtration membrane body, a multilayer porous structure in the polymer micro-filtration membrane and silicon dioxide microspheres distributed on the hole walls, wherein the micro-filtration membrane has a two-layer, three-layer or four-layer multilayer porous structure by utilizing a breath pattern method and controlling different process parameters. The multilayer through-hole high-permeability polymer micro-filtration membrane has the beneficial effects that the polymer micro-filtration membrane has the multilayer porous structure, the through holes are regularly and densely distributed, the aperture is uniform, the orderness is high, the thickness of the hole wall is moderate, the structure is stable, and the mechanical performance of the micro-filtration membrane can be greatly improved; and the modified silicon dioxide microspheres are uniformly distributed on the hole wall of the micro-filtration membrane, and the silicon dioxide has high hydrophilic performance, so thatthe hydrophilic performance of the polymer micro-filtration membrane can be improved, the layer number and the permeability of the micro-filtration membrane can be improved, and the polymer micro-filtration membrane is better in separation capability.

The invention discloses a method for rapidly synthesizing a hierarchical pore ZIF-61 material from a bimetal salt at normal temperature. The method successfully shortens the synthesis time to 1 min. The synthesis method comprises the following steps: 1, dissolving zinc acetate dihydrate and zinc oxide in a mixed solvent of N,N-dimethylformamide and water; 2, dissolving imidazole, dimethylimidazoleand sodium benzenesulfonate in methanol; 3, adding the above obtained imidazole, dimethylimidazole and sodium benzenesulfonate solution to the above obtained mixed solution of zinc acetate dihydrateand zinc oxide, and carrying out full stirring; 4, carrying out suction filtration on the obtained product, and activating the product with ethanol; and 5, carrying out vacuum drying to obtain the hierarchical ZIF-61 material. The (Zn-Zn) bimetal salt and sodium benzenesulfonate are added, so the method has the advantages of simplicity in operation, mild conditions, and great shortening of the synthesis time. The product simultaneously has micro-porous, meso-porous and macro-porous tunnels, has a high space-time yield, and has good application prospects in the fields of adsorption separation and catalysis of macromolecules.

The invention discloses an automatic starting and closing type anti-freezing device of a wind screen of a cooling tower, comprising an air partition ceiling, an adjustable wind-shield wall and a cooling tower body, wherein the air partition ceiling is fixed on the cooling tower body and the adjustable wind-shield wall; the adjustable wind-shield wall comprises a plurality of synchronous rotation starting and closing units of the wind screen, and each synchronous rotation starting and closing unit of the wind screen comprises a frame, a wind screen, an upper rotating component, a lower rotating component and a synchronous driving part; the wind screen can rotate relatively to the frame, and all wind screens are driven to synchronously rotate by the synchronous driving part. Because the wind screen is installed on the frame in the rotating mode, the wind screen can rotate relatively to the frame; when temperature is low in winter, the synchronous driving part drives all wind screens to be in closing state, and all wind screens are in the starting and ventilating state when the temperature rises. The invention can freely adjust the starting and the closing state of the wind screens according to external temperature so as to ensure that the cooling tower can normally and efficiently operate in any season.

The invention discloses a processing method of steamed noodles. The processing method comprises the following steps: selecting wheat flour, the protein content of which is above 13%, putting flour, purified water and refined salt into a vacuum dough mixer according to the proportion of 100:(45-47):(1-1.3) so as to knead dough, standing the dough at 15-20 DEG C for 60-120 DEG C, then, repetitively rolling the dough on a noodle press for 4-6 times, looping the rolled dough piece to form the dough, standing at 15-20 DEG C for 15-60 min, cutting into noodles after repetitively rolling on the noodle press to form the dough piece, putting the cut noodles into boiling water for several seconds, curing the surfaces of the noodles, after taking out and leaching, cooling by rapidly putting into flowing cold water below 10 DEG C, packaging, rapidly freezing the noodles at minus 45 DEG C, directly putting the frozen noodles into a steam box with a hot air system inside, steaming for 5-8 min, and then, obtaining cooked noodles. According to the invention, the surfaces of the steamed noodles cannot be adhered; furthermore, the steamed noodles are smooth, tough, chewy, proper in hardness and good in mouth feel.

The invention discloses a digital watermark implementation method based on a time stamp, and a watermark embedding process comprises the following steps: a short message service center of a service provider employs a return address (TP-RA) and user information (TP-UD) to calculate RAND of a 128bit series through HUSH operation; an authentication center employs the RAND and the Ki of a target cellphone to calculate XRES of a 32bit series through an A3 algorithm; the short message service center employs the XRES to generate digital signatures with three intensities through unidirectional mapping operation; the short message service center enables the digital signatures to serve as watermarks inserted into the time stamp (TP-SCTS) of a PDU data package; and a receiving cellphone employs recognition software to detect the watermarks, and determines whether a short message is from the service operator or not. The method can guarantees the invisibility of the watermarks to a user, does not affect the contents of the short message, and can be directly used for a conventional GSM communication system.