112results about How to "Control shape" patented technology

The invention discloses a two-photon imaging system and method based on vector light field regulation and control, and belongs to the technical field of microscopic imaging. The two-photon imaging system comprises a laser beam expanding module, a vector light field modulation module, a light beam scanning module and an imaging module which are arranged in sequence; the laser beam expanding module comprises a laser, a first half-wave plate, a first polarization beam splitter, a first lens and a second lens which are arranged in sequence; a laser beam generated by the laser passes through the first half-wave plate and the first polarization beam splitter for laser power adjustment, and then passes through the first lens and the second lens for beam diameter adjustment. According to the two-photon imaging system based on vector light field regulation and control, the focal field is regulated and controlled by regulating and controlling the amplitude, the phase and the polarization of the vector light field, and the imaging resolution or the volume imaging speed of the system can be improved.

The embodiment of the invention provides a gold-silver alloy bump structure, a preparation method and a semiconductor device, and the preparation method comprises the steps: providing a semiconductor device, and forming a seed layer on the surface of the semiconductor device; a first gold-silver alloy bump is formed on the seed layer through an electroplating technology, the gold content in the formed first gold-silver alloy bump is larger than 45%, and the thickness of the first gold-silver alloy bump ranges from 0.2 micrometer to 5 micrometers; and electroplating the first gold-silver alloy bump by using the same electroplating liquid to form a second gold-silver alloy bump, wherein the gold content in the formed second gold-silver alloy bump is less than 30%, and the thickness range of the second gold-silver alloy bump is 3-20 [mu] m. The first gold-silver alloy bump with high gold content improves the binding force between the bottom of the gold-silver alloy bump structure and the seed layer of the semiconductor device, and improves the reliability of the semiconductor device. The second gold-silver alloy bump with low gold content can avoid pure gold bumps on the surface of the gold-silver alloy bump structure, the hardness and morphology of the gold-silver alloy bump structure are controlled, and subsequent packaging is ensured.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The invention relates to sphere-like doped cerium dioxide and a preparation method and application thereof.The preparation method comprises the following steps that cerium salt, doped metal salt, a solvent, an acid reagent and a precipitator are mixed and then subjected to a hydrothermal reaction, precipitates are obtained, the precipitates are calcined, and the sphere-like doped cerium dioxide is obtained. The doped metal salt comprises praseodymium salt and / or neodymium salt. According to the preparation method, cerium salt and praseodymium salt and / or neodymium salt serving as doped metal salt serve as raw materials, through the mixing process of the raw materials, the acidic reagent and the precipitant and the design of the reaction process, preparation of sphere-like doped type cerium dioxide is achieved, the doped type cerium dioxide of nano-scale particles is obtained, and in addition, the preparation method has the advantages that the preparation process is simple, and the preparation cost is low. In addition, the preparation method adopted by the invention is simple and convenient in process and short in reaction time, and can be used for large-scale production.

The invention provides platinum-rhodium alloy powder for a nitrogen-oxygen sensor electrode, a preparation method of the platinum-rhodium alloy powder and slurry for the nitrogen-oxygen sensor electrode, and the preparation method of the platinum-rhodium alloy powder for the nitrogen-oxygen sensor electrode comprises the following steps: performing chemical co-reduction on a platinum metal precursor and a rhodium metal precursor to obtain composite powder, the particle size range of the composite powder is 50-100 nm; and carrying out molten salt heat treatment on the composite powder to obtain the submicron platinum-rhodium alloy powder for the nitrogen-oxygen sensor electrode. According to the platinum-rhodium alloy powder prepared through the method, the three-phase interface uniformity of a metal catalytic functional phase and a zirconium oxide ion electrolyte substrate in electrode slurry is improved, the catalytic capacity of an electrode is improved, meanwhile, the particle size of platinum-rhodium alloy particles is properly increased, and therefore the prepared electrode slurry has better flowability, and the service life of the electrode slurry is prolonged. The problem of easy wire breakage in the subsequent sintering process is reduced, and the yield and aging life of the sensor are improved.

The invention discloses a method for preparing a metal casting mold based on steel grit 3D printing, and belongs to the technical field of metal casting mold machining. In order to solve the technical problem that in the prior art, the mechanical strength and collapsibility of a metal casting mold need to be further improved, the method for preparing the metal casting mold based on steel grit 3D printing comprises the following steps that a sand mold three-dimensional model is established according to a metal casting, then casting mold steel grit is filled in an operation box of sand mold 3D printing equipment, and the casting mold steel grit is obtained; the binder storage tank is filled with a binder; and according to the section formation of the sand mold three-dimensional model, a sand paving system of the sand mold 3D printing equipment paves cast steel sand on a printing platform. The casting steel sand and the binder are matched with each other, the metal casting mold blank is prepared through 3D printing and then dried, the normal-temperature mechanical property and high-temperature property of the metal casting mold are effectively improved, the application range of the metal casting mold is widened, and meanwhile the collapsibility of the metal casting mold is improved.

The invention discloses a heat transfer rate control method and device for a graphene liquid drop printing three-dimensional prefabricated body, the heat transfer rate control method is realized by adopting a graphene liquid drop printing three-dimensional prefabricated body device, and the device comprises a printing substrate, a metal enclosing wall, a liftable freezing substrate and a temperature controller, the heat transfer rate control method comprises the steps that the process of printing a three-dimensional prefabricated body is divided into three stages including a low layer, a middle layer and a high layer in sequence according to the number of printing layers, the number of the layers is set to be n1, n2 and n3, and in the layer-by-layer printing process, the temperature of a liftable freezing base plate, the temperature of a metal enclosure and the height of the liftable freezing base plate in each stage are controlled, the control of the ice crystal growth heat transfer rate in the process of printing the three-dimensional preform is realized, and the stability of the ice crystal growth rate is ensured, so that the three-dimensional connected graphene material with uniform axial microstructure and excellent performance is prepared.

The invention discloses a preparation method of sphere-like superfine copper powder. The preparation method comprises the following construction steps that raw materials are subjected to extraction, replacement, primary centrifugal separation, primary reduction, secondary centrifugal separation, secondary reduction, tertiary centrifugal separation, antioxidant coating and drying operation, and then the sphere-like superfine copper powder is finally obtained. The method solves the problems of large powder particle size and easy introduction of impurities in various existing superfine copper powder processing technologies, or the problems of expensive equipment, high cost, low yield and easy oxidation of prepared copper powder in preparation. According to the method, the traditional copper powder preparation process is improved, the reaction system is simplified, the reaction is more stable and controllable, the cuprous oxide and the copper are prepared by sequentially reducing the bivalent copper salt, the reaction protective gas is added in the secondary reduction, and the antioxidant is added, so that the prepared superfine copper powder is prevented from being oxidized in the air.

The invention provides a preparation method of a micro-lens array based on fluid confinement additive, the micro-lens array and application. The preparation method of the micro-lens array comprises the steps of constructing a patterned hydrophilic and hydrophobic gradient on a substrate, forming a confinement energy barrier at a hydrophilic and hydrophobic boundary to constrain movement of a solid / liquid / gas three-phase contact line, realizing confinement of liquid drops, and being beneficial to improving the manufacturing precision, performance and reliability of the micro-lens array. The invention further provides a microlens array and application.

The invention discloses a phosphorus-carbon negative electrode material, a battery and a preparation method and application of the phosphorus-carbon negative electrode material. Relates to the technical field of lithium ion batteries. The lithium ion battery comprises a negative electrode and an electrolyte, the negative electrode comprises a negative electrode material, and the negative electrode material is of a shell-core structure and comprises a substrate and a coating layer; the coating layer completely or partially coats the base body; and the coating layer is prepared from the following components: at least one of LiF, Li3N, Li3PO4, Li2B4O7 and Li4Ti5O12. The negative electrode material in the lithium ion battery contains the coating layer, on one hand, the effect of inhibiting the expansion of the phosphorus material is good, the volume expansion of the phosphorus material can be inhibited from transferring inwards instead of transferring outwards, and on the other hand, the coating layer is a high-ionic-conductivity material, so that the transfer of Li < + > between phosphorus and carbon materials can be improved; therefore, the volume expansion of the negative electrode material in the circulation process is better stabilized.

The invention discloses a double-end-ring bent edge retainer production process and a die. A stretching and bottom cutting integrated forming die is used for carrying out stretching and bottom cutting operation on a circular blank disc, so that the circular blank disc is deformed into a semi-finished product with an inverted bowl-shaped structure, the semi-finished product is transferred to a straightening and shaping die, an inner turned edge formed in the previous step is corrected, and the retainer with the double-end-ring bent edge is obtained. Vertical to the horizontal reference surface; meanwhile, the flanging is adjusted to be parallel to the horizontal plane; a trimming die is used for accurately adjusting the length of the outer flanging on the lower side; an upper port part of the bowl-shaped structure is preliminarily bent by the aid of a pre-flanging die to form a flanging with a certain preset angle, the preliminarily bent part is further bent by the aid of a flanging die until the preliminarily bent part is completely parallel to the horizontal plane to form a stable upper side outer flanging, and the retainer with the double-end ring bent edges is produced by the aid of a multi-step stamping process. And the production speed is high, a plurality of parts can be continuously and rapidly machined, and the time for waiting for cooling or curing is not needed.

The invention relates to the technical field of nano materials, and discloses a preparation method of a horizontal guiding CsPbBr3 nanowire array. The preparation method comprises the following steps: S1, blade-coating a mixture containing polydimethylsiloxane on a channel array template, heating, curing and stripping to obtain a polydimethylsiloxane film with a channel array; s2, cleaning a substrate and performing hydrophobic modification to obtain a hydrophobic substrate; s3, a CsPbBr3 solution is taken, a surfactant is added, and a mixed solution is obtained; and S4, dropwise adding the mixed solution to the surface of a hydrophobic substrate, covering a polydimethylsiloxane film with a channel array, compacting, heating, and stripping to obtain the horizontal guiding CsPbBr3 nanowire array. The preparation method of the horizontally oriented CsPbBr3 nanowire array provided by the invention is simple in steps, short in time consumption and high in efficiency, and the obtained CsPbBr3 nanowire array is tidy in horizontal arrangement, good in continuity and high in crystallization quality.

The invention discloses a method for preparing monodisperse spherical micron cerium oxide, which comprises: 1. adding chitosan to an acetic acid solution, stirring and dissolving to obtain a chitosan solution, then adding a cerium salt to the chitosan solution, stirring and dissolving and performing a hydrothermal reaction, taking out a precipitate after centrifugation, washing and drying to obtain a cerium complex; 2. placing the cerium complex in a muffle furnace, heating and reacting to obtain a monodisperse spherical micron cerium oxide. The invention utilizes chitosan with good dispersing and complexing effects as a complexing agent and a reducing agent, and while reducing the cerium salt by a hydrothermal reaction, the reduced product is fully dispersed and complexed to avoid its agglomeration, and spherical, monodispersed, uniformly sized and stable micron cerium oxide particles are prepared by roasting and oxidation, and the size and shape of the cerium oxide particles are effectively controlled, the process is simple, the repeatability is good, the raw material source is wide, the energy consumption is low, it is green and environmentally friendly, and it is conducive to large-scale industrial production.

The invention discloses a cutting chain type transverse shaft type cutting mechanism suitable for a coal roadway and a half-coal-rock roadway and a heading machine. The cutting mechanism comprises a main machine frame, a motor, a cutting chain, a left cutting head and a right cutting head, the motor, the cutting chain, the left cutting head and the right cutting head are installed on the main machine frame, the left cutting head and the right cutting head are located on the two sides of the cutting chain respectively, and the motor drives the cutting chain to rotate and drives the left cutting head and the right cutting head to rotate; wherein a plurality of middle cutting teeth are distributed on the cutting chain; a plurality of left cutting teeth are distributed on the left cutting head; a plurality of right cutting teeth are distributed on the right cutting head; at least part of the middle cutting picks are matched with the left cutting picks to form a spiral line shape, and at least part of the middle cutting picks are matched with the right cutting picks to form a V shape. The problem that an existing cutting mechanism is low in cutting efficiency is solved.

The invention relates to the technical field of gas separation materials, in particular to a preparation method of a high-selectivity functionalized ZIF-7-8 mixed matrix membrane. The preparation method comprises the following steps: taking pebax-1657 as a matrix material of a mixed matrix membrane, synthesizing a ZIF-7-8 filling material by virtue of a non-solvent induced crystallization (NSIC) method, then carrying out ionic liquid impregnation on ZIF-7-8, and finally preparing the high-performance mixed matrix membrane in a blending manner, so as to obtain the functional modified ZIF-7-8 mixed matrix membrane material. 1-butyl-3-methylimidazole bis (trifluoromethanesulfonyl) imide salt ([bmim] [Tf2N]) is adopted as an ionic liquid, ZIF-7-8 is subjected to functionalization treatment through a post-synthesis method, and the ionic liquid with high affinity to CO2 is loaded in a nanomaterial pore cage, so that the adsorption capacity of the material to CO2 is improved, and the performance of the membrane material is further optimized; therefore, the purpose of improving the CO2 separation performance of the mixed matrix membrane is achieved.

The invention relates to a preparation method of TiZrVNbAl alloy powder with high fine powder yield, and belongs to the technical field of alloy powder materials. The diameter of the flow guide pipe in the gas atomization powder preparation process is designed. High-temperature fine fluid is obtained by properly reducing the diameter of the flow guide pipe and increasing the heating power of the bottom of the crucible; meanwhile, the geometrical shape and the position of the nozzle in the gas atomization powder making process are designed, and the annular nozzle is adopted to enhance the coupling effect between the annular nozzle and fluid flowing out of the flow guide pipe. The hole of the annular nozzle is adjusted to be matched with the diameter of the flow guide pipe, the fluid flowing resistance is reduced, and the interaction between the gas and the fluid is further enhanced. And the relative position and angle between the nozzle and the flow guide pipe are adjusted, so that atomized gas can be in better contact with fluid, the fluid can be more effectively atomized by the gas, finer liquid drops are formed, and the fine powder rate is improved.

The invention relates to the technical field of bridge rectangular pier body pouring, and discloses a bridge rectangular pier body steel bar positioning clamp which comprises a mounting frame. The four mounting openings are formed in the mounting frame, and each mounting opening is of a long-strip-shaped structure; the latches are fixed in the four mounting ports respectively, and the latches located in the same row jointly form a zigzag structure; the sliding seats slide in the four mounting openings respectively, and a mounting groove is formed in the bottom surface of each sliding seat; the mounting cylinders are fixed to the top faces of the sliding seats correspondingly. By arranging the movable sliding seat, the construction flexibility and efficiency are greatly improved, and in the construction process of the rectangular pier body of the bridge, the positioning of reinforcing steel bars often needs to be accurately adjusted according to specific construction conditions and design requirements, so that the construction time and the labor cost are greatly saved.

A light guide member according to an embodiment includes at least one of a first light guide, a second light guide, and a third light guide, where each of the first light guide, the second light guide, and the third light guide includes a structure that acts on light of different wavelength ranges, the first light guide including a first substrate and a first structure, the first structure is disposed on the first substrate and acts on light of a first wavelength range, the first wavelength being 380 nm to 500 nm, the first structure being formed by an assembly of a plurality of first unit structures, the structure of the first unit structures including first protrusions protruding in a first direction, the first protrusions protruding in a second direction, and the first protrusions protruding in a second direction. And the first protruding portion is symmetrical with respect to the second direction with a line in the first direction passing through the center of the first unit structure as an axis thereof.

The invention discloses a method for preparing a high thermal conductivity and low fluid resistance diamond microchannel heat sink, firstly, a dielectric layer film is deposited on the surface of a cleaned polished single crystal silicon wafer substrate, a groove structure with a microchannel frame is formed on the surface of the dielectric layer film by etching using a mask plate with microchannel gate holes; diamond polycrystalline film is epitaxially grown multiple times on the surface of the dielectric layer film with the groove structure, the groove is filled and the dielectric film is covered, and the growth surface of the diamond polycrystalline film is thinned and polished to be flat; the single crystal silicon wafer substrate and the dielectric layer film are removed by pickling or etching, and the nucleation layer of the diamond polycrystalline film is treated by plasma active etching to obtain a diamond wafer with a microchannel structure; finally, a layer of super-hydrophobic amorphous carbon film is deposited on the surface of the diamond microchannel, thereby obtaining a diamond microchannel heat sink with high thermal conductivity and low fluid resistance. The invention comprehensively utilizes the advantages of high thermal conductivity of diamond and super-hydrophobic amorphous carbon-based film, and has significant significance for improving the heat dissipation performance of high-power semiconductor lasers and large-scale integrated circuits.

The invention discloses a preparation method of oxygen-deficient tungsten oxide WO2.72 nanospheres with photodegradation adsorption performance, which comprises the following steps: firstly, providing cations by using urea, embedding the cations into tungsten oxide to form a non-stoichiometric compound ammonium tungsten bronze (NH4) 0.33 WO3, capturing and separating out cations NH4 < + > in holes by using OH <-> radicals provided by deionized water in a mixed solution, and promoting the valence state of W to be reduced from W < 6 + > to W < 5 + >, thereby obtaining the oxygen-deficient tungsten oxide WO2.72 nanospheres with photodegradation adsorption performance. Meanwhile, in the synthesis process, the alcohol serves as a solvent, on one hand, a reaction medium needed for synthesizing the WO2.72 is provided, on the other hand, through interaction of the alcohol, the urea and the deionized water, growth and morphology of the product are controlled, the final product WO2.72 is synthesized, the WO2.72 synthesized in the mode not only solves the agglomeration problem of WO2.72 synthesized in the prior art, but also improves the yield of the WO2.72. And moreover, by accurately controlling the synthesis conditions, accurate regulation and control on the morphology and the size of the product are realized, and the adsorption and photodegradation properties of the product are improved.

The utility model relates to an auxiliary device for enteroscopy, which comprises a cylinder, and a containing cavity matched with an enteroscopy to go deep into the intestinal tract is arranged in the cylinder. An expansion balloon is arranged at the front end of the barrel; a handheld end is arranged at the rear end of the barrel body, the handheld end is of a cuboid structure, and a through hole matched with the containing cavity is formed in the middle of the handheld end; correspondingly, one side of the through hole is further provided with an inflation device. The anus protecting device has the advantages that the structure is simple, the operation is convenient and fast, the anus part is effectively protected from repeated friction, and the pain and discomfort of a detected person are relieved; on the other hand, through the arrangement of the air bag, the shape and size of the head end of the barrel can be effectively controlled to be matched with different patients for use, and the practicability and comfort of the device are improved.

The invention discloses a method for rolling 170 * 190 mm bars through a cogging mill pass system, and relates to the technical field of cogging mills. According to the method for rolling the bar with the size of 170 * 190 mm through a cogging mill pass system, a cogging mill rolling system comprises a large manipulator opening degree, a small manipulator opening degree and cogging mill rolling reduction, and a 430 * 350 mm raw material section is rolled into a section with the size of 170 * 190 mm through nine passes; turning steel in front of a first pass machine, wherein the K1 rolling reduction is 75-95 mm; turning steel after a second pass machine, wherein the rolling reduction of K1 is 50-70mm; turning steel in front of a third pass machine, wherein the rolling reduction of K2 is 60-80 mm; turning steel after a fourth pass machine, wherein the rolling reduction of K2 is 70-90 mm; turning steel in front of the machine in the fifth pass, wherein the rolling reduction of K3 is 55-75 mm; the steel is not turned over in the sixth pass, and the rolling reduction of K3 is 50-70 mm; turning steel in front of the machine in the seventh pass, wherein the rolling reduction of K4 is 55-75 mm; steel turning is avoided in the eighth pass, and the rolling reduction of K3 is 35-55 mm; and turning steel in front of the ninth pass machine, wherein the rolling reduction of K5 is 50-70 mm.

The present invention provides a welding device and a welding method for welding annular fillet welds. The welding device includes a supporting mechanism, a displacement mechanism and a welding robot. The supporting mechanism includes a fixed block, a mandrel rod fixedly connected to the fixed block, a sleeve sleeved on the outer periphery of the mandrel rod, a plurality of connecting rods and a plurality of barrel parts; the plurality of connecting rods are arranged at intervals along the circumferential direction of the mandrel rod, and the two ends of each connecting rod are respectively connected to the sleeve and the inner wall of the barrel part; the plurality of barrel parts are arranged along the circumferential direction of the mandrel rod; the sleeve can move along the axial direction relative to the mandrel rod, so that the plurality of barrel parts can move synchronously along the radial direction of the mandrel rod and relatively open or relatively close; the displacement mechanism includes a machine base, a rotating assembly arranged on the machine base and a clamping assembly arranged on the rotating assembly, the clamping assembly can clamp the fixed block, and the rotating assembly can drive the clamping assembly to rotate; the welding robot is arranged corresponding to the displacement mechanism, and is used for welding the workpiece on the supporting mechanism clamped by the clamping assembly.

The utility model relates to the technical field of camera devices, particularly provides a variable aperture structure, a camera module and an intelligent terminal, and aims to solve the problems that the thickness of the variable aperture is large and the adjustable range of the aperture is limited due to the fact that blades of the conventional variable aperture are stacked, so that the number of obtained apertures with different sizes is small; and the requirements of various shooting scenes are difficult to meet. In order to achieve the purpose, the variable aperture comprises an aperture cover plate and a driving mechanism, a plurality of apertures with different sizes are arranged on the aperture cover plate, the aperture cover plate is connected with the output end of the driving mechanism, and the driving mechanism is used for driving the aperture cover plate to move, so that the apertures with required sizes can move to target positions. The variable aperture is provided with a plurality of apertures of different sizes, can meet the requirements of various shooting scenes, improves the imaging quality, can reduce the thickness of the variable aperture, and enables the overall thickness of the camera module and the intelligent terminal to be reduced.

The embodiment of the invention provides a laser collimation device and a processing system. The laser collimation device comprises a shielding assembly and a diaphragm. The shielding assembly is provided with an incident port, an emergent port and a collimation channel extending in the first direction, the incident port and the emergent port are formed in the two opposite ends of the collimation channel and communicate with the collimation channel, and a light path passing through the collimation channel is formed between the incident port and the emergent port. At least one of the incident port and the emergent port is provided with a diaphragm, the diaphragm is provided with a light through hole for laser to pass through, and the light through hole is communicated with the collimation channel. The laser collimation device provided by the embodiment of the invention is good in collimation effect.

The invention relates to the technical field of food processing, in particular to a forming machine for food processing, which comprises a tumbling mechanism, the tumbling mechanism comprises a compression roller and an arc-shaped supporting plate which are coaxially arranged, the axes of the compression roller and the arc-shaped supporting plate are horizontal, and the arc-shaped supporting plate is located on the lower side of the compression roller; according to the machine, food is continuously conveyed from one end to the other end through the design of the tumbling mechanism, so that food processing is not discontinuous any more, but a continuous production process is adopted, and the processing efficiency is greatly improved; the action of manual rubbing is simulated by utilizing the rotation and reciprocating motion of the compression roller, but the speed and the force can be more uniform and controllable, so that the processing speed and the processing efficiency are improved.

The utility model belongs to the technical field of polyethylene antibacterial film production, and discloses a blowing traction device for polyethylene antibacterial film production, which comprises a die head, an air ring arranged above the die head, a herringbone plate arranged above the air ring, a traction component arranged on one side of the herringbone plate, a plurality of annular air pipes arranged at equal intervals up and down, and a plurality of air pipes arranged at equal intervals up and down, a plurality of uniformly distributed adjustable air outlets are formed in the annular air pipe, the annular air pipe is connected with an air guide branch pipe, an air volume control valve is arranged on the air guide branch pipe, the air guide branch pipe is connected with an air guide main pipe, one end of the air guide main pipe is connected with a fan, an inlet of the fan is connected with a filter, the air ring is designed into multiple layers, and the air volume and the air direction of each layer can be independently controlled; by optimizing the distribution and action of each layer of wind, the cooling speed and shape of the film bubbles can be better controlled, and the transparency and mechanical property of the film are improved.

The present invention provides a leaf shape control process method based on punching guidance technology, which helps to improve the middle piece rate and helps to effectively control the shape of the punched tobacco leaves. The specific method of the present invention is to set a leaf punching process before the leaf beating process. A series of holes are punched on the flattened tobacco leaves using a punching device to form patterns of several specific shapes, such as triangles, quadrilaterals, pentagons, hexagons, etc., or combinations thereof. The shapes, sizes, and combinations of these patterns are adjustable and controllable, or determined according to the requirements of customers (i.e., cigarette companies). The pre-punched tobacco leaves are transported to the leaf beating process. In the leaf beating process, due to the guiding effect of the weak strength lines formed by the punching, the position where the tobacco leaves are torn will tend to be along a predetermined line, thereby achieving the purpose of controlling the leaf shape and improving the middle piece rate.

The invention provides a FeCo Prussian blue derivative as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a stabilizer and potassium ferricyanide in an ethanol / water mixed solution, and then adding cobalt acetate in batches for reaction to prepare the FeCo Prussian blue derivative. The FeCo Prussian blue derivative prepared by the method is in a square block shape, is small in particle size and uniform in distribution, has oxidoid enzyme and peroxidase-like activity, and can discolor TMB, ABTS and OPD and generate a characteristic absorption peak; the invention also provides an ascorbic acid concentration detection method which comprises the following steps: mixing the color-changing substrate solution with the FeCo Prussian blue derivative, adding ascorbic acid with gradient concentration, detecting corresponding absorbance, constructing a linear relation between the absorbance and the ascorbic acid concentration, and detecting ascorbic acid with unknown concentration by using the constructed linear relation. The detection method is simple, easy to operate and high in speed.

The invention discloses a grid model processing method and device, a storage medium and electronic equipment. The method comprises the steps of obtaining model information of a target grid model; based on the model information, determining an average normal of a plurality of vertexes and a surface normal of a plurality of surfaces on the target grid model; determining control parameters of the plurality of vertexes based on the average normal of the plurality of vertexes and the surface normal of the plurality of surfaces; and generating a stroking effect of the target grid model based on the control parameters of the plurality of vertexes and an average normal of the plurality of vertexes, the width of the stroking effect being determined based on the control parameters of the plurality of vertexes. According to the method and the device, the technical problems of relatively poor effect and relatively low efficiency of generating the stroking effect of the network model in related technologies are solved.