888 results about "Hexagonal prism" patented technology

In an embodiment, an antenna for a medical device, e.g., an implantable medical device (IMD), comprises an electrically conductive wire that spirals to form a three-dimensional shape of a rectangular cuboid. In another embodiment, the antenna comprises an electrically conductive wire that spirals to form a three-dimensional shape of an elliptical cylinder, an oval cylinder, an elongated pentagonal prism, an elongated hexagonal prism, or some other shape where the longitudinal diameter of the antenna is greater than the lateral diameter of the antenna. The antennas are sized to fit within a portion of a header of the medical device. Such antennas are designed to provide increased antenna gain and antenna bandwidth.

The invention provides a bionic anti-sticking lyophobic and oleophobic pasting film and belongs to the technical field of a polytetrafluoroethylene product. The surface of a thin film layer is provided with a first-grade convex hull type structure and a second-grade convex hull type structure, wherein each convex hull type structure is formed by convex hull structure units; the bottoms of the convex hull structure units are circular, regularly triangular, regularly quadrilateral or regularly hexagonal; and a convex hull is in a bowl shape, a cylinder shape, a cone shape, a triangular prism shape, a quadrangular shape or a hexagonal prism shape. The bionic anti-sticking lyophobic and oleophobic pasting film can be randomly bent, and is used on an irregular surface to convert a previous hydrophilic and oleophilic surface into a lyophobic and oleophobic surface, so that the bionic anti-sticking lyophobic and oleophobic pasting film can be widely applied to fields including automobiles, kitchen utensils, electronic products and the like.

The invention discloses a bionic bone trabecula cervical vertebral fusion cage. The bionic bone trabecula cervical vertebral fusion cage is characterized in that a body of the cervical vertebral fusion cage is in the shape of a hexagonal prism, the interior of the body is in the shape of a three-dimensional net, and square through holes (1) are formed in the middles of the upper end face, the lower end face, the front end face and the rear end face of the body respectively. A manufacturing method of the bionic bone trabecula cervical vertebral fusion cage comprises the following steps that 1, original parameters of the bone trabecula are calculated; 2, a target model is established; 3, specific hole unit bodies are stacked within the boundary range of the target model disorderly, the sizes of the hole unit bodies, the distance between hole units, the sizes of ribs in the hole unit bodies, the sizes of connecting ribs between the hole unit bodies and the precision and appearance precision of an integrated bone trabecula structure are set, and finally the original target model is deleted, and the bone trabecula structure obtained after filling is reserved. According to the bionic bone trabecula cervical vertebral fusion cage and the manufacturing method of the bionic bone trabecula cervical vertebral fusion cage, a cancellous bone structure of a human body is simulated in the microstructure aspect through a 3D printing product, and the technical problems that according to a traditional centrum fusion cage, only the mechanical supporting function is achieved, and a formed bone can not be induced to grow are solved.

The invention relates to the technical field of nanometer materials and the preparation thereof, in particular to a hydroxyapatite with a hollow nanometer structure and a preparation method thereof. The outer appearance of the hydroxyapatite with the hollow nanometer structure is elliptic, spindle-shaped or hexagonal prism-shaped; and the nanometer structure is a hollow structure. The preparation method comprises the following steps: dissolving a certain quantity of calcium sources, phosphor sources, fluoride and chelating agents into deionized water; then adjusting the pH value of the solution; transferring the solution into a hydrothermal kettle and carrying out hydro-thermal reaction for a period time; and centrifuging, washing and drying after the reaction. Any templates and surface active agent are not used in the invention; the hollow nanometer structure of the hydroxyapatite is synthesized for one step; and the invention has the advantages of low cost, mild reaction conditions and simple devices required. The hollow nanometer structure of the hydroxyapatite prepared in the invention has uniform dimension, good dispersivity and large volume of a hollow part, and can be used as medicine and catalyst carriers.

The invention relates to a scissors type hexagonal-prism-shaped extensible unit and a space extensible mechanism formed by the same. The scissors type hexagonal-prism-shaped extensible unit being a single-freedom-degree over-constrained hexagonal-prism-shaped basic extensible unit comprises twelve floral discs, six groups of scissors type folding rods, and twelve groups of folding connecting rods. One group of folding connecting rods limits the extending degree of the basic extensible unit based on the connecting rod lengths and the rest of eleven groups of folding connecting rods are over-constrained folding connecting rod, so that the rigidity of the basic extensible unit is improved effectively. Multiple basic extensible unit are arranged closely and the adjacent basic extensible units can form a space extensible mechanism by sharing four floral discs, one group of scissors type folding rods and two groups of folding connecting rods; and the size of the pace extensible mechanism can be changed by changing the number of the space extensible units. The provided scissors type hexagonal-prism-shaped extensible unit has high structural symmetry; and different large-dimension space extensible mechanisms can be formed based on assembling of multiple extensible units. Therefore, the scissors type hexagonal-prism-shaped extensible unit and the space extensible mechanism are suitable for constructing a space solar battery array bracket and a satellite planar reflecting antenna.

A stake suitable for use in construction is formed from an elongate threaded metal member, typically of length between 0.45 meter and 1.8 meter, having two ends. A first end region, tapered to a sharp point over typically 3 centimeters, is suitable to be plunged into earth. A middle region has threads that are both deeply cut, typically at a ratio of root diameter to outside diameter less than 0.80, and steeply inclined, typically at least 1 in 20. A second end region has a feature in the shape of a regular prism suitable to be engaged by a torquing tool for rotation of the entire stake. The second end region feature may be a prism of regular cross section, normally a hexagonal prism, of a diameter everywhere less than the minor diameter of the middle region's threads. The second end region feature is preferably (i) a continuation of the middle region's threads in combination with (ii) several, normally two, nuts of 9 mm nominal internal diameter threaded onto the feature and tightly jammed together. The stake is readily screwed into and extracted even from even hard earth by forcible rotation with power tools. The threaded stake readily mounts devices and fixtures, and is particularly useful as part of an assemblage for forming monolithic concrete slab-on-grade foundations in situ.

A neurological rehabilitation training device solves the problem that the current rehabilitation training device needs the assistance of medical personnel, the training effect is poor and the functionis single, and comprises a base; a base plate sliding horizontally on the right side of the base plate and a seat capable of vertical lifting and lowering is fixed on the base plate; a pedal shaft isrotatably fixed in the first box, An incomplete external gear is fixed on the pedal shaft, An upper side of that incomplete external gear is meshed with an external gear, the incomplete external gearis coaxially fix with an incomplete internal gear, the incomplete internal gear is meshed with the external gear, the second bevel gear is fixed with a vertical first hexagonal prism, the first hexagonal prism is sleeved with a first rotational shaft, and the first rotational shaft is rotatably fixed in the second column; a second hexagonal prism sleeves the left end of the second rotational shaft, and the first rotational shaft and the second hexagonal prism are connected through the second bevel gear set; a hand grip arm of the radiating device is symmetrically arranged on the outer side ofthe third upright post, and the second rotating shaft is connected with the hand grip arm through the third bevel gear set.

The invention discloses a coupled normal distribution probability demonstration instrument, improves the normal distribution demonstration instrument Galton pinboard, and is used for visually demonstrating normal distribution coupling relation. The construction scheme is as follows: regular hexagonal prisms form nails which are vertically adhered on front and back substrates, the adjacent surface of two adjacent regular hexagonal prisms and front and back substrates form clearance which constitutes a globule running channel, thus ensuring that the probability of globules falling into a left pipeline or a right pipeline after touching a nail is equal and the globules fall off along the channel and vertically touch the nail edge of the next layer. The substrate is provided with a globule feeding device, a regular hexagonal prism honeycomb array, globule catching tubes and a globule storage box; the globule feeding device is constructed into different globule feeding proportions of two paths of the globules according to binomial distribution principle, the regular hexagonal prism honeycomb array is formed by coupling two independent normal distribution models, and channel of the last layer are the globule catching tubes, all globule catching tubes form an array face which visually demonstrate coupled normal distribution probability graphics of the globules entering the regular hexagonal prism honeycomb array. The invention materializes abstracts concept to material objects, which plays an active role for the instruction of probability theory.

An n-type GaN layer is grown onto a sapphire substrate and a hexagonal etching mask is formed onto the n-type GaN layer as provided. The n-type GaN layer is etched to a predetermined depth by using the etching mask by the RIE method. A hexagonal prism portion whose upper surface is a C plane is formed. After the etching mask was removed, an active layer and a p-type GaN layer are sequentially grown onto the whole surface of the substrate so as to cover the hexagonal prism portion, thereby forming a light emitting device structure. After that, a p-side electrode is formed onto the p-type GaN layer of the hexagonal prism portion and an n-side electrode is formed onto the n-type GaN layer.

An urchin-like sodium-containing lithium-rich layered cathode material and a preparation method thereof belong to the field of a lithium ion battery electrode material and a preparation technology. The chemical composition of the material is Li1.2-zNazMn0.54Co0.13Ni0.13O2 (z is greater than or equal to 0.03 and less than or equal to 0.1), and the urchin-like structure is formed by hexagonal-prism-shaped primary particles. The method is prepared by the following steps: a transition metal composite carbonate (MCO3, M=Mn, Co, Ni) precursor is prepared by a coprecipitation method; through high-temperature roasting, transition metal composite oxide (MOx, M=Mn, Co, Ni) is obtained; and the transition metal composite oxide, a lithium source and a sodium source undergo ball-mill mixing, and finally high-temperature roasting is carried out so as to obtain the product. The invention has the following advantage: the material has good rate capability and cycling stability. During high-temperature roasting of the mixture of the transition metal composite oxide, the lithium source and the sodium source, by the influence of sodion on crystal growth orientation, the urchin-like sodium-containing lithium-rich layered material is obtained. In addition, the preparation process is simple.

The invention relates to a shears-fork type hexagonal-prism extensible unit and a space extensible mechanism formed by the same. The shears-fork type hexagonal-prism extensible unit being a single-freedom-degree over-constrained hexagonal-prism basic extensible unit comprises twelve floral discs, six groups of shears-fork type folding rods, and twelve groups of folding connecting rods. One group of folding connecting rods limits the extending degree of the basic extensible unit based on the connecting rod lengths and the rest eleven groups of folding connecting rods are over-constrained folding connecting rods, so that the rigidity of the basic extensible unit is improved effectively. Multiple basic extensible unit are arranged closely and the adjacent basic extensible units can form a space extensible mechanism by sharing four floral discs, one group of shears-fork type folding rods and two groups of folding connecting rods; and the size of the pace extensible mechanism can be changed by changing the number of the space extensible units. The provided shears-fork type hexagonal-prism extensible unit has high structural symmetry; and different large-dimension space extensible mechanisms can be formed based on assembling of multiple extensible units. Therefore, the shears-fork type hexagonal-prism extensible unit and the space extensible mechanism are suitable for constructing a space solar battery array bracket and a satellite planar reflecting antenna.

The invention discloses a pan head cross self-drilling screw and a processing process thereof. The pan head cross self-drilling screw comprises a pan head body, a supporting gasket, a screw and a drill tail, wherein the pan head is in the shape of a hexagonal prism; at least one chip removal hole is formed in the side surface of the pan head; the supporting gasket is arranged at the lower end of the pan head; a first water encounter swelling water-stop belt covers the lower surface of the supporting gasket; the upper end of the screw penetrates through the supporting gasket and is fixedly connected with the lower end of the pan head; the lower end of the screw is fixedly connected with the drill tail; a through hole is formed in the middle of the screw from top to bottom; the upper end of the through hole communicates with the chip removal hole; inner threads are arranged in the through hole; and at least three elastic supporting pins are fixedly connected on the edge of the supporting gasket uniformly at intervals. When an operator uses the pan head cross self-drilling screw to drill and fasten, the outer threads on the outer part of the screw achieves the effects of drilling and removing chips while the through hole also achieves the effect of drilling and removing chips, so that drilling is more efficient during use, chip removal is smooth, and operation is labor-saving.

The invention discloses a method for preparing a large-size sheet by using small-diameter wood. The method comprises the steps of: cutting small-diameter wood with a diameter of 6-11cm into wood sections with lengths of 1m, grouping into 5 groups according to the diameter of the small head and the 10mm difference, and drying until the water content is 12 percent; sawing the wood sections into rough regular hexagonal prisms, inscribed circles of bottom surfaces of which are 46mm, 56mm, 66mm, 76mm and 86mm, extending through a finger joint tenon and cutting according to the specification, milling into refine regular hexagonal prisms, inscribed circles of bottom surfaces of which are 40mm, 50mm, 60mm, 70mm and 80mm; symmetrically splitting the regular hexagonal prisms into quadraprisms through the maximum diagonal plane; symmetrically splitting the regular hexagonal prisms into pentagonal prisms through a plane vertical to the side surfaces of the hexagonal prisms; and selecting the quantities of the refine regular hexagonal prisms, and the pentagonal prisms and the quadraprisms, thereby obtaining a rectangular large-section glued wood beam through coating, assembling and bidirectional-pressurizing, and sawing into the large-size sheet with the thickness of 5-20mm. According to the method, the utilization rate and the use value of the small-diameter wood are improved.

The invention discloses a catalyst with non-noble metal nanoclusters confined and stabilized in silicalite-1 molecular sieve pore channels, and a preparation method and an application thereof, and belongs to the technical field of molecular sieves. The molecular sieve loaded catalyst provided by the invention has a single nanoparticle with a shape of a hexagonal prism, a length of about 200 nm, awidth of about 200 nm and a thickness of about 100 nm. Non-noble metal nanoclusters contained in the molecular sieve pore channels of the catalyst provided by the invention have good dispersity whichis larger than 80%, comprise non-noble metal elements of Cu, Fe, Co, Ni and Ag, and have a particle size of 1 to 2 nm. The catalyst provided by the invention has ultrahigh single product selectivity in a solvent-free liquid-phase oxidation of toluene, and has good conversion efficiency compared with catalysts of a same kind. Meanwhile, the pore channel structure of the catalyst provided by the invention also has a certain selective redox function for aromatic compounds.

The invention relates to an indoor automatic detecting and cleaning robot, which comprises a shell, a vortex evacuator, a garbage box and a four-wheel travelling mechanism. The robot is characterized in that: a shell is in a shape of regular hexagonal prism; a battery box, a touch display screen and a control circuit board are arranged on the top of the shell; a camera is arranged on each lateralsurface of the shell; the garbage box is a regular hexagonal annular box, the upper part of the garbage box is provided with a circular hole, the circular hole is connected with the vortex evacuator through a pipeline, and the four-wheel travelling mechanism is arranged on the middle part of an inner ring of the garbage box; and each lateral surface of the garbage box is provided with a garbage inlet, a dustpan is arranged on each lateral surface of the garbage box, the rear part of each dustpan is provided with a garbage outlet communicated with the garbage box, a rolling brush is arranged on the front part of each dustpan, the bristle of each rolling brush is crossed with a front edge plate of the dustpan, a helical gear is arranged on each rolling brush shaft, the adjacent helical gears are engaged, and one of the rolling brush shafts is in transmission connection with a driving motor shaft. The robot has the advantages of low energy consumption, comprehensive function and thoroughcleaning.

The invention relates to a novel multifunctional medicine kit. The novel multifunctional medicine kit comprises a kit body and a kit cover; a first flat plate is arranged in the kit body; a shaft hole is formed in the first flat plate; a first rotating shaft is connected to the shaft hole in a rotary mode; a cutter disc is arranged on the first rotation shaft; a cutter is arranged on the cutter disc; a first bevel gear is arranged on the first rotating shaft; a second bevel gear is meshed to the first bevel gear through gears; a scale division clamping device is arranged on the kit body; a second rotating shaft is arranged at the end of the second bevel gear; a hexagonal prism is arranged at the tail end of the second rotating shaft; a third rotating shaft is arranged at the end of the hexagonal prism; and a first internal hexagonal groove is formed in the outer end face of the third rotating shaft. A first insertion connection hole, a first pressing rod, a first pressing block and a second reset spring are arranged on the kit cover. A second through hole is formed in the first flat plate; a grinding container clamping mechanism is fixedly installed on the second through hole; and a grinding container is clamped in an arc-shaped clamping area. A puncture mechanism is installed on the kit cover. The novel multifunctional medicine kit is ingenious and reasonable in design and worthy of application and popularization.

An interlocking building block, and procedure for constructing the same, having a planar locking mechanism and a spatial locking mechanism. The planar locking mechanism being a three-clawed piece built around an equilateral triangle with protruding arms and grooves corresponding to a circular arc. The protruding claws are rotated on a plane around a center of rotation. These align with grooves of another three-clawed piece to offer a locking mechanism, where the center point of the circular arc is identical to the center of planar rotation. The spatial locking mechanism may have a hexagonal prism placed next to the three-clawed piece and connected to the corners of the equilateral triangle, into which the three-clawed piece is placed so that the protruding claws extend beyond the hexagonal prism, or the spatial locking mechanism consists of protrusions ensuring a groove / taper connection and connecting grooves, so that each piece contains protrusions and grooves.

The invention relates to a technology for making small-diameter logs into laminated wood, which comprises the following steps: sorting the logs with standard diameter, cutting off the long small-diameter logs with fixed length and extending the short small-diameter logs with fixed length to obtain log sections with standard length; cutting the log sections with standard length into small-sized regular hexagonal prisms or semi-regular hexagonal prisms; coating cold pressing adhesives on a plurality of surfaces of the prisms; and carrying out assembling in a certain mode, cold-pressing under high frequency and aging to obtain the laminated wood. The technology of the invention can effectively improve the utilization ratio of the small-diameter logs, enhance the strength and the dimensional stability of the laminated wood made of the small-diameter logs, enlarge the application field of the laminated wood made of the small-diameter logs, increase the added value of the small-diameter logs and improve the production efficiency of the laminated wood.

The invention discloses a stretching and drawing integral structure in a shape similar to a frustum of a regular hexagonal prism. At present, no stretching and drawing integral structure in the shape of the frustum of the regular hexagonal prism or the shape similar to the frustum of the regular hexagonal prism exists. The stretching and drawing integral structure in the shape similar to the frustum of the regular hexagonal prism is formed by twelve joints, twenty-four inhaul cables and six pressure bars totally, wherein the twenty-four inhaul cables can be further subdivided into four sets, and each set has six inhaul cables. The twelve joints are located on twelve top points of the bottom face and the top face of the similar frustum of the regular hexagonal prism, and the bottom face and the top face are twisted one degree relatively. All the inhaul cables are arranged on the surfaces of the frustum of the regular hexagonal prism. The first set of inhaul cables are arranged on the bottom face and coincide with six edges of the orthohexagonal bottom face. The second set of inhaul cables are arranged on the top face and intersect with one another to form a regular hexangular star shape. The third set of inhaul cables coincide with six vertical edges of the twisted frustum of the regular hexagonal prism. The fourth set of inhaul cables are located on diagonal lines of six side faces of the twisted frustum of the regular hexagonal prism. The six pressure bars are located inside the prism. Each pressure bar is connected with one joint of the bottom face and one joint of the top face. All the joints are hinged joints. Each joint is connected with four inhaul cables and one pressure bar. All the inhaul cables have pretension force. All the pressure bars have pre-pressure force. The pretension force of the inhaul cables and the pre-pressure force of the pressure bars are mutually balanced.

The invention discloses a nickel-doped zinc oxide hierarchical structure photocatalytic nano-material having a visible-light photocatalytic activity and a preparation method thereof. The component of the material is Zn1-xNixO, wherein x=0.5-10 mol%. The method comprises the steps: dissolving a zinc salt, a nickel salt and an alkali in an alcohol solvent or an alcohol / water mixed solvent to obtain a precursor solution with the total concentration of the metal ions of 0.0625-0.25 mol / L and the molar concentration of the alkali of 0.0625-2.5 mol / L; placing the precursor solution in a high-pressure reaction kettle for sealing reaction; after cooling, washing with ethanol, drying in air, and thus obtaining the photocatalytic nano-material having a nano-granular structure, a hollow sphere structure, an icosahedron structure, a hexagonal prism structure or a ball-like structure and other hierarchical structures. The material both has relatively strong photoabsorption and photoresponse in the visible light range of 400-700 nm, significantly improves the activity of visible-light photocatalytic degradation of organic dyes, and can be widely used for photocatalytic degradation treatment of dye industry wastewater.

The invention relates to a hexagonal prism type graphene-metal organic framework composite material as well as a preparation method thereof and belongs to the technical field of high polymer chemistry, polymer self-assembly and supermolecular materials. Firstly, carboxyl graphene coordinates with copper ions through a solvothermal reaction, and a precursor is prepared; then, an organic carboxylic acid ligand is directly added to a precursor reaction solution, a secondary solvothermal reaction is performed, and the precursor plays a role in structure directing of crystal growth. Compared with the original octahedron configuration of a copper-based coordination polymer, the carboxyl graphene-copper ion coordination precursor changes the morphology of the composite material into the hexagonal prism type, and the performance in the aspect of gas adsorption is improved. The preparation technology is simple, the cost is low, the carboxyl graphene-copper ion coordination precursor is used as a structure-directing agent under the mild condition, so that the morphology of the copper-based coordination polymer is changed, and the gas adsorption performance of the material is improved. A brand-new way is provided for change of the morphology of the metal organic coordination polymer.

The invention discloses a spherical display screen and a manufacturing method thereof. The method comprises the following steps: according to the Euler's formula in space, obtaining 12 pentagons and 20 hexagons which can form a 32-face body inscribed in a spherical surface; then causing one points on the spherical surfaces corresponding to the pentagons and the hexagons to be connected with the end points of corresponding pentagons and hexagons to form pentagonal pyramids and hexagonal pyramids; according to the side faces of the pentagonal pyramids and the hexagonal pyramids, manufacturing pentagonal display modules and hexagonal display modules; finally assembling 12 pentagonal display modules and 20 hexagonal display modules into a spherical screen similar with a sphere. Therefore, when the display modules are designed, at most 32 display modules are designed, the product-design period is greatly shortened, and a lot of design labor resources are reduced. In the spherical display screen manufactured with the method, glowing pixel points can be uniformly arranged on each triangular side face of the pentagonal display modules and the hexagonal display modules. The spherical display screen has the advantages of simple structure, good pictures of displayed images and small distortion.

The invention discloses a supercritical carbon dioxide reactor fuel assembly, and solves the problem that a fuel assembly in the prior art cannot have stronger moderating power and be used in a high-temperature environment under the premise of reducing the volume. The supercritical carbon dioxide reactor fuel assembly comprises an upper pipe saddle, a fuel core and a lower pipe saddle sequentiallyarranged from top to bottom, wherein the fuel core comprises a moderator zone, a heat insulation and burnable poison zone and a fuel zone coaxially arranged from inside to outside; the moderator zoneis of a hexagonal prism structure; the heat insulation and burnable poison zone is of a hexagonal annular structure which sleeves the outer wall of the moderator zone; the fuel zone is of a hexagonalannular structure which sleeves the outer wall of the heat insulation and burnable poison zone; a moderator cooling hole is formed in the moderator zone; a fuel coolant hole is formed in the fuel zone; and supercritical carbon dioxide flows across the moderator cooling hole from top to bottom first, flows across the fuel coolant hole from bottom to top, and then is discharged. The supercritical carbon dioxide reactor fuel assembly has the advantages of small volume of a reactor core, strong moderating power, unrestricted operating environment, and the like.

The invention relates to a processing method for manufacturing a laminated wood board core board from spruce branch tips and a laminated wood board. Branch tip resources which are rich in resources and low in cost can be effectively used. The problem of low material yield of the spruce branch tips is solved. The waste spruce branch tips in a hill are used and are subjected to processing processes, such as cutting, selecting, drying, processing hexagonal prism, coating glue, combining blanks, cold pressing, pressing planning and the like, through mechanical equipment; standard spruce hexagonal prism square materials are produced; and the profiled spruce hexagonal prism square materials are processed into spruce hexagonal prism plates through a small laminated wood board band saw for later use. The spruce hexagonal prism plates are matched with cottonwood single plates and lauan panels to produce the laminated wood board core boards with low cost and high quality; and the requirement on increasing using of plates in building field and decoration field can be met.

The invention provides a preparation method of a monoatomic catalyst by taking mesoporous titania as a carrier. The preparation method comprises the following steps: dissolving polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) into an ethanol solution, after dissolution is ended, respectively adding a certain amount of concentrated sulfuric acid and concentrated hydrochloric acid, stirring at room temperature for a certain time, then adding isopropyl titanate, stirring for a certain time, then adding chloropalladic acid, and preparing a precursor of Pd@TiO2 bySolvent volatilization induced self-assembly technique; drying the precursor, then putting into a muffle furnace, heating to a certain temperature in a program heating way, and keeping the temperature for a period of time; after roasting is ended, reducing at a certain temperature by using an H2 / N2 gas mixture, thus obtaining a palladium monoatomic catalyst with uniform particles. The monoatomiccatalyst prepared by the preparation method has the advantages that the process is simple, metal atoms are dispersed uniformly on the carrier, the repeatability is good, the range of suitable acids iswide, a product is a nanoparticle in a hexagonal prism or sphere shape, therefore the pore size distribution is uniform, the catalytic performance is excellent, and mass production can be realized.

The invention discloses a hexagonal columnar structure for a diffracted optical waveguide. The hexagonal columnar structure comprises a micro-projection light machine used for emitting image light, awaveguide substrate used for forming a diffraction grating, a coupling-in grating used for receiving and conducting the image light emitted by the micro-projection light machine, and a coupling-out grating. The coupling-in grating is arranged at the light inlet of the waveguide substrate, the coupling-out grating is arranged at the light outlet of the waveguide substrate, and the coupling-out grating is provided with a plurality of regular hexagonal prisms for diffracting image light; the adjacent spacing distances of the regular hexagonal prism subareas are gradually reduced and are distributed in an axial symmetry manner. The coupling-out grating has the beneficial effects that through the designed multiple partition regular hexagonal prisms, the multiple partition regular hexagonal prisms are arranged in the 60-degree included angle array, and the problems that the efficiency of the whole diffraction waveguide of the diffraction grating is low and uneven, and the effect of a projection image seen by a user is not good enough are well solved.

The invention relates to an iron-based composite material and especially relates to a method for reducing pouring temperature of iron-based surface composite material through heat release of thermit reaction, wherein the principle is as follows: triggering the thermit reaction by heating molten iron, counteracting the cooling effect of a ceramic particle pre-forming block on the molten iron through the heat release part of the thermit reaction, and simultaneously forming an alloy having the ingredients the same as that of a high-chromium iron substrate through the thermit reaction; in order to generate no effect on the distribution of the ceramic reinforcement particles and improve the wearing resistance of the hexagonal prism hole or honeycomb hole part, the reactant of the thermit reaction is processed to a cylindrical shape and is added in the hexagonal prism hole or honeycomb hole of the ceramic particle pre-forming block, the reactant powder is mixed and is pressed to the cylindrical shape so as to conveniently process and apply the cylindrical reactant, and the reactant powder is wrapped by an aluminum foil to prevent the cylinder from being broken and prevent the reactant powder from dropping.

The invention provides a biological sucker imitating artificial limb receiving chamber with an open structure. The biological sucker imitating artificial limb receiving chamber is sequentially provided with flexible suckers, a transition layer and a hard chamber body from inside to outside. The transition layer is provided with multiple pore structures from the inner side to the outer side, and the hard chamber body is provided with multiple hollowed-out structures. The flexible suckers can be stably sucked on a limb in a scattered distribution mode. Densely arranged hexagonal prism protrusions are arranged on the inner surfaces of the flexible suckers, a groove is formed between every two hexagonal prism protrusions, and the sucking stability of the flexible suckers is improved. The transition layer is made of a material with moderate softness, the communicated pore structures are arranged on the transition layer from the inner side to the outer side, and vent holes are distributed in the connecting surfaces of the transition layers and the flexible suckers. The hollowed-out structures are designed on the hard chamber body according to biomechanical characteristics, the weight can be reduced, and the open structure of the whole receiving chamber is achieved. The biological sucker imitating artificial limb receiving chamber is firm and stable in sucking, good in comfort and breathability, good in adaptability, low in overall weight, simple in manufacturing process and beneficial for long-use of the disable.

The invention relates to the field of civil engineering, and discloses an aluminium alloy column-plate node structure used for a space structure to solve the problems in the prior art that a node form is single, a node field web plate of a plate type node is disconnected, a bending moment and a shearing force are transferred only depending on an upper cover plate and a lower cover plate, the transfer mode is relatively weak, the construction is disadvantaged due to too high quantity of bolts, and the construction cost is high. The aluminium alloy column-plate node structure comprises a hollow hexagonal prism, a first cover plate, a second cover plate, six connection workpieces, six connection plates and a plurality of fasteners, wherein vertical plates are mounted between upper plates and lower plates; the first cover plate is horizontally arranged at the top end of the hollow hexagonal prism; the second cover plate is horizontally arranged at the lower end of the hollow hexagonal prism; a lengthwise center line of the hollow hexagonal prism is coincided with a center line of the first cover plate and a center line of the second cover plate; the six connection plates are mounted on the six side surfaces of the hollow hexagonal prism by the multiple fasteners respectively; and the connection workpieces are fixedly mounted on the first cover plate and the second cover plate by the multiple fasteners respectively. The aluminium alloy column-plate node structure is applied to the field of civil engineering construction.