72results about How to "Structural continuity" patented technology

The invention relates to an environment-friendly halogen-free flame-retardant copolyoxymethylene compound and a preparation method thereof, belonging to the field of the preparation of flame-retardant polymer material. The compound comprises the components with the mass percentage as follows: 56.0-69.0 percent of copolyoxymethylene resin, 15.0-22.0 percent of flame retardant, 5.0-7.0 percent of flame retardant synergist, 3.0-7.0 percent of char-forming agent, 3.0-5.0 percent of toughener, 0.1-0.5 percent of formaldehyde absorbent, 0.1-1.0 percent of antioxidant and 0.5-3.0 percent of heat rejection and dripping-resistant agent. In the invention, the flame retardant, the flame retardant synergist and the heat rejection and dripping-resistant agent are coated by the toughener to manufacture compound flame retardant; then the compound flame retardant is mixed with the copolyoxymethylene, the formaldehyde absorbent, the char-forming agent and the antioxidant uniformly and the mixture is extruded from a double-screw extruder and granulated; and the copolyoxymethylene compound is obtained. The compound has good flame-retardant performance, the flame-retardant grade reaches UL94V-0 grade, and the compound is friendly to the environment.

The invention relates to a method for preparing a nano porous copper thin film material by magnetron sputtering. The method takes a commercial copper foil as a base body material and takes high-purity copper target and aluminum target as sputtering materials; magnetron sputtering equipment is a preparation tool; a nano porous copper thin film is obtained by sputtering a copper-aluminum thin film through a glow discharge principle, and dealloying and corroding to remove an active component aluminum after annealing and alloying. The method provided by the invention is a two-step reaction method, the problems in the prior art that steps for carrying out smelting, ball milling and melt spinning on alloy auxiliary materials are complicated and consumed time is long are solved, and steps of a preparation process are simplified; a nano porous structure of nano porous copper is obtained and the size of the thin film is controllable; the obtained structure is better than a nano porous copper powder sample obtained by a traditional method; furthermore, an application range of the nano porous copper is enlarged and the nano porous copper has a commercial prospect.

The invention relates to a bionic nerve graft used for peripheral nervous recovery and a preparation method and application thereof. The bionic nerve graft comprises a chitosan film conduit and a fibrous protein hydrogel beam positioned in the chitosan film conduit, wherein the fibrous protein hydrogel beam is prepared from fibrous protein through an electrospinning technique. The bionic nerve graft prepared by the preparation method is formed by the filling of the chitosan film conduit and the fibrous protein hydrogel beam of a multi-stage orientation structure, wherein a nerve regrowth space is effectively supported by a chitosan film, the orientational regeneration of a nerve axon is effectively guided by the fibrous protein hydrogel beam of multi-stage orientation, the cell affinity and the mechanical property of whole materials are good, and in addition, degrading speed and the repairing speed of peripheral nervous tissues are matched.

The invention provides a medical polyvinyl alcohol sponge and a preparation method. The preparation method comprises the following steps: adding polyvinyl alcohol and starch into distilled water carrying out dissolving at 50 to 95 DEG C under stirring so as to obtain a mixed solution; adding a cross-linking agent, an emulsifier and a foam stabilizer into the mixed solution and carrying out stirring at 20 to 60 DEG C for 2 to 8 h so as to obtain a second mixed solution; adding an acidic catalyst into the second mixed solution and carrying out an acetalation cross-linking reaction at a constant temperature of 20 to 90 DEG C for 30 to 180 min so as to obtain emulsion-like liquid; and completion of the reaction, pouring the emulsion-like liquid into a mold, carrying out heating at 50 to 95 DEG C for curing, carrying out demoulding and washing after cooling, and then carrying out cutting and sterilization so as to obtain the medical polyvinyl alcohol sponge. The medical polyvinyl alcohol sponge prepared in the invention has a through hole structure, uniform pore diameter, good biocompatibility, excellent affinity, high porosity and fast liquid absorption rate, and is applicable to the field of surgical sciences, especially as a sponge consumable for vacuum sealing drainage.

The invention discloses an optical cable splice box, and aims at providing a splice box which is good in matching and low in accuracy requirement and can ensure a sealing effect during bearing and heating. The optical cable splice box comprises an upper half box and a lower half box, wherein the upper half box and the lower half box are connected to forma box body; at least two optical fiber hole frames are arranged at the two ends of the box body respectively; each optical fiber hole frame comprises an outer section and an inner section; optical fiber inlet sleeves are arranged in the outer sections; the inner sections consist of half slots in the lower half box and half slots in the upper half box; corresponding elastic clamp sleeves are arranged in the half slots; sealing grooves are formed in the upper half box and the lower half box; sealing strips are arranged in the sealing grooves; the sealing strips and the elastic clamp sleeves are connected to form sealing rings; each sealing strip is 0.5-1mm higher than an opening of each sealing groove; and cross sections of the sealing strips are trapezoids with outward large bottom edges. The optical cable splice box has the benefits that an assembling accuracy requirement is low; the cost is saved; displacement is not easy to generateat butting parts of the sealing rings; the sealability is good; and a reinforcing structure is arranged in the box body, so that the compressive capacity and the overall strength are high.

The invention discloses a multi-parameter tumor blood vessel normalization detection system and detection method. The system comprises a light source module, an imaging module, a blood flow detectionand analysis module, a blood oxygen detection and analysis module, a blood vessel normalization judgment module and a display module. According to the method, a two-dimensional blood flow image is reconstructed through an algorithm, blood vessel morphology characteristics are extracted through an image processing method, a two-dimensional tumor blood oxygen image is calculated through a laser image and a narrow-band green light image, tumor tissue hypoxia degree information is provided, and through a deep neural network discrimination method and combination with blood flow image characteristics and blood oxygen image characteristics whether tumor vessels are normalized or not can be judged. The method has the advantages of being multi-parameter, non-invasive, non-radiative, intelligent indiagnosis and the like, whether tumor blood vessels are in a normal window period or not is intelligently judged by monitoring tumor blood supply, oxygen supply and blood vessel forms, and a basis isprovided for making a more reasonable anti-tumor combined treatment scheme.

The invention provides a method for forming a frequency selective surface structure on an folding-unavailable curved surface. The method includes the steps that printing ink is used for overprinting an FSS cycle array graph on a water-soluble PVA thin film, a water-soluble PVA thin film graph with the FSS cycle array graph overprinted is upward laid on a peaceful water surface, atomized organic solvents are sprayed on the FSS cycle array graph, an oil film graph is stuck to the surface of a product with the folding-unavailable curved surface, and the FSS cycle array graph is obtained on the surface of the product with the folding-unavailable curved surface. According to the method for forming the frequency selective surface structure on the folding-unavailable curved surface, an original technology and materials of the product do not need to be changed, the FSS graph can be produced on any curved surface shape (especially the folding-unavailable curved surface), the produced FSS array structure is continuous and fine, and the graphics solution line width reaches 0.1 mm.

The invention discloses a melt electrostatic spinning preparation method of nano inorganic salt fibers. The melt electrostatic spinning preparation method comprises the following steps: building a temperature field, a pressure field and an electrostatic field with graphite pipes, then preparing inorganic salt melt liquid via the temperature field, spraying the inorganic salt melt liquid from a spraying head via the pressure field, enabling a sprayed inorganic salt material to enter the electrostatic field and be provided with static electricity, and blowing cold inert gas in the spinning direction, wherein the inorganic salt material is quickly stretched in the electrostatic field to form nano fibers; receiving the fibers with a roller serving as a fiber receiver. The melt electrostatic spinning preparation method has the benefits: due to the melt electrostatic spinning method, inorganic non-metal salt with high melting point or high surface tension is pushed to be developed towards the nano-level direction; no solvent is used, so that the method is a green manufacturing method capable of preparing continuous nano fibers with smooth surfaces; no other substance molecules can be doped into the nano fibers, so that the purity is high; due to no solvent and high temperature, the production procedure for preparing glass nano fibers of the melt electrostatic spinning method is simple and extremely high in industrialization potential.

The invention discloses a rapid repairing construction method for an old road through polyurethane-modified early-strength cement concrete. The method comprises the following steps of 1, designing a polyurethane-modified early-strength cement concrete matching ratio, wherein step 1 comprises the following procedures that 2.1) raw materials are selected, and 2.2) an orthogonal experiment is designed for determining the optimal matching ratio; 2, implementing the rapid repairing construction method for an old cement pavement through the polyurethane-modified early-strength cement concrete, wherein step 2 comprises the following procedures that 2.1) the materials are mixed, 2.2) the materials are conveyed, 2.3) an interface agent is sprayed, 2.4) the polyurethane-modified early-strength cement concrete is laid, 2.5) overlay face grooving and maintenance are conducted, and 2.6) a color surface layer is sprayed. Compared with a traditional asphalt concrete overlay face method, the polyurethane-modified early-strength cement concrete ultra-thin overlay face technology is advanced, the old cement pavement can be quickly repaired, and the method has obvious economic and technical advantages.

The invention discloses an ultralow-water-content sludge dewatering and drying system and a drying treatment method thereof. The ultralow-water-content sludge dewatering and drying system comprises adewatering device, a drying device and a waste gas treatment device. The drying device comprises a drying container, and a primary crushing mechanism, a mud cake forming mechanism and a secondary crushing mechanism that are sequentially arranged in the length direction of the drying container at intervals; wherein the primary crushing mechanism is arranged corresponding to a discharge port of thedehydration device, the sludge cake forming mechanism is used for filter-pressing sludge passing through the primary crushing mechanism into a sludge cake, the secondary crushing mechanism is used forcrushing the sludge cake passing through the sludge cake forming mechanism into sludge particles, and high-temperature gas in the incineration tower is introduced into an inner cavity of the drying container. A waste gas recovery opening is formed in the wall body of the drying container, one end of the waste gas recovery assembly is arranged corresponding to the waste gas recovery opening and the other end of the waste gas recovery assembly is introduced into the incineration tower, and therefore, sludge can be dewatered and dried quickly and sufficiently.

The invention relates to a method for preparing a continuous regular lamellar microgroove based on a lamellar eutectic alloy system. According to the method, directional solidification technology and selective corrosion technology are combined together; the lamellar eutectic alloy system is used as a base; and lamellar eutectic alloy is prepared by using the directional solidification technology at first, then according to different electrode potentials of composition phases of the eutectic, one of the composition phases is selectively eroded in an appropriate electrolyte, so a continuous regular lamellar single-phase microgroove structure is formed. The preparation process of the method is simple, convenient and controllable; the prepared microgroove is continuous and has more regular morphology, the depth and width of the microgroove are adjustable by adjusting a drawing rate and erosion time, the dimension control accuracy of the microgroove is higher, and the microgroove can be used as a template for preparation of microgroove structures of other metal elements or alloy through a template process; and combination of the directional solidification technology and the selective corrosion technology provides a novel method and thinking for preparation of microgrooves.

The invention belongs to the technical field of preparation of carbon aerogel, and specifically relates to a method for preparing carbon aerogel by using normal-pressure drying. The preparation methodcomprises the following steps: introducing a reinforcing agent into a reaction monomer and catalyst system, preparing wet gel by using a sol-gel method, carrying out aging treatment on the wet gel, replacing moisture in the wet gel by using a low-surface-tension solvent, putting the wet gel into air, carrying out normal-pressure drying to obtain organic aerogel, and carbonizing the organic aerogel to obtain carbon aerogel, wherein the reaction monomers are resorcinol and formaldehyde, and the reinforcing agent is high-molecular polymer F127; according to the method disclosed by the invention,complex processes of a conventional supercritical drying method and a freeze drying method are avoided, meanwhile, the shrinkage rate of the carbon aerogel material in a normal-pressure drying process is greatly reduced, and the supercapacitor electrode material with excellent performance can be obtained at a low price.

The invention discloses a fabricated prefabricated slope protection device and a construction method thereof. Slope protection blocks are formed through one-time pouring; at least one planting hole isformed in each slope protection block; clamping devices are arranged at the two sides of each slope protection block; the multiple slope protection blocks are connected through the clamping devices on the side faces; the ends of the multiple slope protection blocks are connected through transverse fixing frames; lug plates are arranged at the two ends of each slope protection block; the lug plates at the ends of every two adjacent slope protection blocks are connected with form a drainage groove; and single slope protection elements are connected through the clamping devices at the two sidesin a spliced mode. According to the fabricated prefabricated slope protection device and the construction method thereof, after assembly is completed, a continuous and complete three-dimensional structure is rapidly formed, a slope protection structure has excellent water permeability, ultrahigh strength, excellent durability, and the fabricated prefabricated slope protection device has a good greening effect and has good popularization value.

The invention aims at the shortcomings that the current culture stones are heavy in weight, high in cost or poor in thermal insulation properties and have poor bondability with the building blocks, masonries and the like, are easily spalled, have short service lives and the like, and provides a rigid polyurethane foam (RPUF) culture stone and a production method thereof. The RPUF product with goodbondability, good thermal insulation property, light materials and long service life is obtained by improving the culture stone raw materials, production steps and technological conditions, which issuitable for the indoor and outdoor decoration in various environments.

The invention provides a capsule identification control method for a beverage machine. The beverage machine comprises a base, a brewing cup, a brewing head and an identification device, the brewing head and the identification device are both arranged on the base, a capsule is contained in the brewing cup, the brewing cup is rotatably matched with the brewing head, and the capsule comprises a diaphragm having an identification code. The capsule identification control method comprises a rotation identification step, wherein the brewing cup drives a capsule relative identification device to rotate, and the identification device detects the identification code on the diaphragm in real time and obtains identification data. According to the control method, in the rotation identification step, inthe process when the brewing cup is rotatably matched with the brewing head and the diaphragm is in a rotating state, the identification device detects the identification code and obtains the identification data. In the process of installing the brewing cup, the capsule identification process is completed, the identification efficiency is high, and the time for preparing a beverage is saved. In addition, the identification device and a brewing device are integrated, the structure is simple, the identification and brewing operation is continuous, and more convenience is provided for a user during use.

The invention discloses an interface oxygen vacancy based stable-storage resistive random access memory achieving method and relates to a Schottky contact based method for achieving resistive random access memories which is optimal in storage performance and simple in structure. According to the method, a magnetron sputtering method is used for sputtering metal Au film on an Nb: SrTiO3 mono-crystal substrate to obtain memories in an Au/Nb: Sr TiO3/Au plane structure, and accordingly, the stable-maintaining resistive random access memory performance is obtained. The method has the advantages that resistive random access memories are produced by plating Au on a mono-crystal Nb: SrTiO3 substrate through magnetron sputtering, the production process is achieved through one step, the memory production process is simple, other complex steps are not needed, and resistive random access memories are simple in structure and applicable to industrial production. The performance test result shows that compared with prior inventions, a good maintaining performance is provided, which is one of key factors determining the memory performance.

The invention discloses a method using pressure swing adsorption to purify hydrogen produced from anaerobic fermentation of kitchen garbage. The method includes: using a reciprocating type two-stage compressor to increase the pressure of dewatered and desulfurized raw material gas to 3.8-4.0MPa and lower the temperature of the dewatered and desulfurized raw material gas to 5-15 DEG C; using the bottom of an absorption tower to absorb hydrogen in the high-pressure and low-temperature mixed raw material gas, and discharging methane and carbon dioxide; desorbing the hydrogen absorbed in absorbent; subjecting an absorption bed to vacuumizing regeneration, and allowing the absorption bed to enter the next absorption cycle; allowing the hydrogen obtained by the desorption to sequentially pass a vacuum tank and an oil-water separator, and using a water ring vacuum pump to pump the hydrogen into a second buffer tank; using a reciprocating type four-stage compressor to increase the pressure and lower the temperature, and performing molecular sieve deep dewatering to obtain the product hydrogen. The method has the advantages that gases such as methane and carbon dioxide can be recycled, and the purification and enrichment degree of the hydrogen reaches more than 99%; the method is suitable for large-scale continuous production, simple and continuous in equipment structure, convenient to operate and capable of reducing energy consumption.

The invention discloses a large-span combined arch bridge based on a bending pressure design theory and a design and construction method thereof. The arch bridge comprises an arch springing section capable of bearing the action of tension or pressure and an arch web-arch crown section of an open web structure. The arch axis part of the arch foot section is a convergent composite curve; the curvature is changed, the arch foot section is rigidly connected with the arch web-arch crown section; the structure is continued, the tangent slopes of connecting points between the two are consistent, thecurvature of the arch foot section is gradually increased to be close to 90 degrees, only vertical component force exists, the horizontal component force is close to 0, the horizontal thrust of the main arch is reduced by 30%-64%, and the transverse stability is improved by 35%-55%; and horizontal tie bars required for overcoming horizontal thrust are reduced or canceled, so that the manufacturingcost is saved, the mechanical advantage that the composite structure material can be pressed and can be tensile and the economic spanning capacity of the large-span arch bridge can be fully exerted,and the section efficiency is improved.

The invention relates to glass clinker added into peritectic steel casting powder. The glass clinker comprises, by weight, 78.00-86.00 Wt% of gold and copper tailings, 5.00-10.00 Wt% of SiO2, 5.00-9.00 Wt% of CaF2, 1.00-2.00 Wt% of BaO, 0.50-1.50 Wt% of CO2O3, 0-0.2 Wt% of MnO2 and 0-0.1 Wt% of Ni2O3. In the using process, the weight percentage meets the requirement of 100 Wt%. The composite peritectic steel casting powder with excellent performance can be obtained by ball milling and even mixing of 40.00-60.00 Wt% of the peritectic steel casting powder, 30.00-50.00 Wt% of the prepared glass clinker and 3.00-12.00 Wt% of carbon dust. The composite peritectic steel casting powder has the advantages of being high in glass forming speed, high in crystallization rate, dark black in color, low in density of heat flow, small in release gas amount in the using process, even in slag film, capable of obviously reducing longitudinal cracking of peritectic steel casting blank and the like.

The invention belongs to the technical field of membranes, and discloses a PCNT and PGO synergistically modified polymer hybrid proton exchange membrane and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a polydopamine modified carbon nanotube DCNT; (2) preparing graphene oxide DGO modified by polydopamine; (3) carrying out a reaction on alendronate and DCNT to obtain a phosphorylated carbon nanotube PCNT; (4) carrying out reaction on alendronate and DGO to obtain phosphorylated graphene oxide PGO; and (5) obtaining a membrane casting solution based on the sulfonated polymer solution, PCNT and PGO to form a membrane material, and further treating to obtain the PCNT and PGO synergistically modified polymer hybrid proton exchange membrane. The structure and composition of key functional components in the proton exchange membrane are improved, and the proton conductivity of the prepared proton exchange membrane is greatly improved based on the synergistic effect of the functional components PCNT and PGO.

The invention provides a compact inductor and load integrated gas switch. The compact inductor and load integrated gas switch comprises an outer insulating cylinder, a conical cathode electrode tip and a conical anode electrode tip; the two ends of the outer insulating cylinder are sealed by the conical cathode electrode tip and the conical anode electrode tip respectively, the outer insulating cylinder is filled with high-pressure insulation gas, and at least one of the cathode electrode tip and the anode electrode tip is a hollow conical surface electrode structure. The hollow conical surface electrode structure comprises an electrode tip, an electrode base plate and an inductance unit arranged between the electrode tip and the electrode base plate, the electrode base plate is of a circular ring structure, the electrode tip, semi-circular-ring-shaped inductors and an inductor supporting section form a hollow conical surface layout. The inductors, load and switch integrated structure is obtained under the high-voltage and high-field conditions, so that a switch circuit structure is more compact, and self inductance is controllable.

The invention relates to a polymer optical fiber panel, a manufacturing method and a large-area polymer optical fiber panel, and belongs to an optical fiber panel used in an imaging technology. According to the technical scheme, the overall structure of the polymer optical fiber panel is a regular polygon, polymer optical fiber monofilaments arranged in an array mode are arranged in the polymer optical fiber panel, each polymer optical fiber monofilament comprises a polymer core material and a polymer skin material wrapping the polymer core material, the polymer core material is located in the center, and the polymer skin material wraps the polymer core material. Compared with the prior art, the polymer optical fiber prepared by adopting a composite spinning method is low in cost, high in manufacturing speed and capable of being continuously and efficiently manufactured. According to the polymer optical fiber panel, the polymer optical fibers are adopted to manufacture the polymer optical fiber panel through the fusion-wire drawing-fusion process, each unit of the manufactured polymer optical fiber panel can independently transmit images, the unit structure of the single polymer optical fiber panel is regular, the internal structure is stable, and the resolution ratio is high when the polymer optical fiber panel is used.

A human body lumen stent with radial large deformation and large support force is formed by etching a metal tube and is a tubular net-shaped structure, which is composed of a plurality of sine wave-shaped circular ring-shaped basic structures (1) which are distributed along the axial direction, the wave peaks of the sine waves between every adjacent two sine wave-shaped circular ring-shaped basic structures (1) are opposite and are connected by connecting parts (2) with Omega-shaped structures which are arranged at the both sides and combined back-to-back, and the connecting points (3) are selected at the vertex of the wave peaks of the sine wave-shaped circular ring-shaped basic structures (1). The rib width (5) of the connecting parts (2) is less than or equal to the rib width (4) of the sine wave-shaped circular ring-shaped basic structures (1). The end part of the lumen stent can be made into horn shape, and the internal surface and the external surface of the stent can be covered with a metal membrane, an oxide membrane, a polymer membrane or a sustained-release drug membrane. The material for etching the metal tube of the lumen stent can be nickel-titanium alloy, stainless steel, titanium alloy and pure metals, such as tantalum or gold etc. The structure of the invention has the radial large deformation and the large support force.

The invention discloses a method and device for forming a solid particle medium of an aluminum-coated magnesium composite pipe. A mold sleeve and a mold core are arranged on a workbench, and a thermocouple is arranged in the mold core. A mold cavity is formed in the mold core. An upper gland is arranged at the top of a mold, and a lower gland is arranged at the bottom of the mold. Through holes are formed in the center of the upper gland and the center of the lower gland. An upper puncher pin is arranged in the through hole of the upper gland, and a lower puncher pin movably penetrates into the through hole of the lower gland. The upper puncher pin and the lower puncher pin are both connected with a hydraulic system. Water-cooled pipes are arranged in the upper gland and the lower gland, and an induction heating coil is arranged on the outer ring of the mold. A magnesium alloy and an aluminum alloy are firstly overlaid, the solid particle medium is adopted for pull expanding forming, and the aluminum-coated magnesium alloy component continuous in structure, high in layer interface strength and good in corrosion resistance is finally obtained by controlling the forming and connecting temperature, time and pressure. According to the method and device, the former procedure of composite plate preparation is omitted, cost is reduced, and efficiency is improved; and meanwhile, interface layer damage caused by composite plate expanding forming is avoided.