31results about How to "Reduce rate" patented technology

The present invention comprises: a first tray for forming a portion of an ice-making cell; a second tray forming the other portion of the ice-making cell, and capable of moving relative to the first tray; an ice bin for storing ice separated from the first and second trays; and a full-ice sensing lever for moving together with the second tray in a predetermined range.

This application provides a data transmission method, a network interface card (NIC) for a data receiving end, an electronic device, and a storage medium. The data transmission method is applied to the NIC of the data receiving end. The NIC writes data to the host memory of the data receiving end via a bus. The data transmission method includes: if the bus bandwidth resources required for the NIC to write the target data to the host memory exceed the bus bandwidth resources available to the NIC, then writing a portion of the target data to the NIC's NIC buffer; the NIC buffer includes a first memory buffer configured for the NIC based on its on-chip memory and a second memory buffer configured for the NIC based on its onboard memory; the data sending end sends the target data to the data receiving end via remote direct memory access; and a portion of the data is written from the NIC buffer to the host memory. The solution of this application can better avoid data packet loss problems when facing sudden traffic surges.

The invention relates to the technical field of polymethyl methacrylate, and discloses a flame-retardant polymethyl methacrylate material and a preparation method thereof.The flame-retardant polymethyl methacrylate material is obtained by reacting polymethyl methacrylate, a hydroxyl-terminated flame retardant and p-toluenesulfonic acid. The linear polymethyl methacrylate is crosslinked into a three-dimensional network structure, so that the crosslinking degree between molecular chains is enhanced, the molecular chains are not easy to slip under stress, good structural stability is maintained, and the polymethyl methacrylate has high tensile strength and bending strength. The flame retardant contains piperazine rings and phosphate structures, forms an intumescent flame-retardant system, generates phosphoric acid substances, nitrogen and other gases during combustion, promotes dehydration of a matrix to form an intumescent carbon layer, isolates oxygen, prevents heat conduction, inhibits the combustion process, remarkably reduces the peak value of the heat release rate and the total heat release amount, and has excellent flame-retardant performance.

This invention discloses a self-healing, anti-corrosion, and cooling coating and its preparation method. The preparation method includes: TiO2 surface activation treatment; in-situ construction of a mesoporous silica shell and loading of a corrosion inhibitor; surface silane modification; and coating and curing after blending the obtained filler with resin and curing agent. The coating consists of a polymer resin matrix and a multifunctional core-shell nanocomposite material uniformly dispersed therein; the composite material has a three-level structure of core-shell-interface layer: titanium dioxide as the core, mesoporous silica loaded with corrosion inhibitor as the functional shell, and a silane coupling agent as the interfacial compatibility layer. Through multi-level structural design, this invention enables a single filler to simultaneously achieve high solar reflectance, high infrared emission, and intelligent release of corrosion inhibitors. The coating combines a physical barrier, active corrosion prevention, and radiation cooling triple protection mechanism, and can be widely used for long-term protection of outdoor metal or non-metal substrates.

A cathode material, its preparation method, a cathode sheet, and a secondary battery are disclosed. The cathode material includes a core and a buffer layer. The core contains a first lithium manganese iron phosphate doped with a metal element. The buffer layer covers the outer surface of the core and contains a second lithium manganese iron phosphate. Along the thickness direction of the buffer layer, the iron-manganese ratio near the core is smaller than that far from the core. This cathode material can solve the problem that existing lithium manganese iron phosphate exhibits a dual-voltage plateau characteristic during charge and discharge, affecting the accuracy of charge state estimation.

The invention belongs to the field of agricultural fertilizers, and provides a micro-mineral activator and an application thereof in improving the fertilizer efficiency of a bio-organic fertilizer. According to the invention, epoxy silane coupling modified potassium feldspar powder is adopted as a core to construct a two-phase collaborative design of humic acid coated core-shell composite powder IM-X and metal ion crosslinked microgel powder IM-Y; the balance between the compressive strength of the particles and the rapid disintegration and dispersion performance when encountering water is realized, the consideration of a high-solid-content low-water-adding-amount granulation process window and the rheological stability of a humic acid cross-linked network is considered, and the unification of moisture absorption and caking resistance during storage and transportation and water absorption and retention ion response regulation and control functions after application is realized; the mineral-organic composite additive solves the performance coupling contradiction of natural conflicts in physical and chemical mechanisms of the existing mineral-organic composite additive, has the advantages of good processing controllability, excellent storage and transportation stability and remarkable fertilizer efficiency improvement effect, and has wide application value in the field of bio-organic fertilizer synergism.

The application discloses a needle-tooth shell assembly and a speed reducer, and solves the problem of high difficulty in needle selection and the problem of speed reducer failure caused by needle-tooth groove wear in the prior art. The needle-tooth shell assembly comprises a needle-tooth shell and a needle-tooth sleeve. The needle-tooth sleeve is arranged to be movable on the needle-tooth shell, so that the position of the needle-tooth groove on the needle-tooth sleeve for cooperating with the needle can be adjusted, and the diameter of the needle-tooth shell is adjusted, so that the needle-tooth groove can be adapted according to the selection of the needle, the problem that the needle engagement top gap is too different from the theory due to the error in the diameter screening of the needle in the prior art is solved, the purpose of weakening the adverse effect of the large diameter fluctuation of the needle on the service life of the speed reducer is achieved, the assembly precision of the speed reducer and the service life of the speed reducer are improved, the purpose of reducing the idle stroke of the speed reducer and the attenuation rate of the stiffness curve is achieved, and the service life of the speed reducer is improved.

The invention provides an anion exchange membrane electrolyzed water cathode electrode and a preparation method thereof. The anion exchange membrane electrolyzed water cathode electrode comprises a carbon fiber substrate and cathode catalyst slurry cured on the surface of the carbon fiber substrate, and the cathode catalyst slurry comprises the following components in parts by mass: 20 parts of an anion ionomer, 10 parts of a catalyst, 5-9 parts of a 5% binder solution and 250-300 parts of a solvent; wherein a binder in the 5% binder solution is selected from at least one of polytetrafluoroethylene, polyvinylidene fluoride, polyethylene, polyvinyl alcohol and polyvinylpyrrolidone. The high-molecular binder and the anion ionomer are introduced to form a composite network, the binding force between the catalyst layer and the porous transmission layer is improved, the attenuation rate is low, the stability is high, and the problems of stripping and pulverization of the catalyst layer under the working conditions of strong alkalinity and high gas-liquid flow rate can be effectively solved.

The invention is suitable for the technical field of aero-engines, and provides a venturi tube structure, a swirler and a combustion chamber, the venturi tube structure comprises a venturi tube outer layer and a venturi tube inner layer, the venturi tube outer layer is provided with a containing cavity, a plurality of first protrusions are arranged on one side of the venturi tube inner layer in the circumferential direction at intervals, and a plurality of second protrusions are arranged on the other side of the venturi tube inner layer in the circumferential direction at intervals; the venturi tube inner layer is embedded in the containing cavity, the multiple first protrusions abut against the inner wall of the containing cavity so that a first cavity can be formed between the venturi tube outer layer and the venturi tube inner layer, and the multiple second protrusions abut against the inner wall of the containing cavity so that a second cavity can be formed between the venturi tube outer layer and the venturi tube inner layer; the first cavity and the second cavity are mutually independent and are used for preventing high temperature from being directly transmitted to the inner layer of the venturi tube. By means of the core structure design of the double-layer tube body and the independent cavities, the first cavity and the second cavity which are independent of each other are formed between the two tubes, direct conduction of high temperature from the outer layer of the venturi tube to the inner layer of the venturi tube is blocked by means of the air heat insulation characteristic, and the carbon deposition restraining effect is remarkable.

This utility model discloses a portable desalination device for metallic artifacts, belonging to the field of cultural relic protection technology. It includes a mobile frame with casters fixed to the bottom via spring shock absorbers. A desalination assembly is located on the top of the frame, comprising a desalination chamber, a lid, partition grooves, partition plates, threaded grooves, several connecting rods, and clamps. The desalination assembly, with its cross-shaped partition grooves and snap-fit ​​partition plates within the desalination chamber, allows for flexible adjustment of the internal space dimensions, adapting to metallic artifacts of different sizes and volumes, significantly improving the device's adaptability. Furthermore, the connecting rods mounted via the threaded grooves flexibly secure the clamps and a waterproof camera. The monitoring sensor probe within the clamps can acquire multi-dimensional data at different depths of the solution in real time, while the waterproof camera simultaneously records the artifact's condition, eliminating reliance on manual sampling and enriching parameter monitoring methods.

The application discloses a high-strength and high-toughness Al-Ca-In series aluminum alloy low-oxygen spherical powder for additive manufacturing and a preparation method thereof, relates to the technical field of additive manufacturing powder, and comprises the following components in percentage by mass: 1.5-3.0% of magnesium, 0.15-0.60% of manganese, 1.0-2.0% of calcium, 0.06-0.25% of indium, 0.08-0.18% of zirconium and 0-0.05% of titanium, and the balance of aluminum and impurities, wherein the total oxygen is not more than 0.10%; the powder surface has a nitrogen-containing diffusion barrier layer with a thickness of 2-8 nanometers and an ultrathin oxide layer with a thickness of 0.5-2.0 nanometers in sequence, and the surface enrichment and interface capture indexes are limited; and the powder is prepared by high-temperature dissolution of manganese and zirconium, low-temperature segmented calcium addition, nitrogen-containing gas atomization and low-temperature micro-oxidation. The powder inhibits the surface migration and oxidation loss of calcium and indium, improves the component stability in recycling and forming, reduces defects and performance dispersion, and is suitable for the high-strength and high-toughness manufacturing consistency of thin-wall lattice load-bearing parts.

An object of the present invention is to provide a composite particle that can achieve both a high silicon utilization rate and suppression of oxidation during water dispersion. A composite particle of the present invention is a composite particle including a particle including a carbon material and silicon, and a coating layer including carbon and oxygen on the surface of the particle, in which the composite particle has a true density of 1.80 to 1.99 g / cm3; in the Raman spectrum, a peak is present at 450 to 495 cm-1, and when the intensity of the peak is defined as ISi and the intensity of the G band is defined as IG, ISi / IG is 1.3 or less; and when the ratios of the number of atoms of Si, O, and C in X-ray photoelectron spectroscopy are defined as ASi, AO, and AC, respectively, and the ratios of SiO2 and SiO are defined as BSiO2 and BSiO, respectively, ASi is 0.05 or more, and ISi / IG and Ac / (Ac + ASi × (BSiO2 + BSiO)) have predetermined relationships.

The invention relates to an optical element testing system, in particular to an optical element performance testing system and method based on ultralow-temperature high-vacuum coupling, and aims to solve the problem that an existing testing system cannot test the performance of an optical element while simulating an ultralow-temperature and ultrahigh-vacuum sequential coupling environment. Precision testing equipment is protected, and all-parameter and multi-attitude stable and accurate testing of the optical element is achieved. The system comprises a testing container and a tested container which are communicated with each other, and a high-reflectivity one-way film evaporation container is arranged in the testing container and used for slowing down temperature and pressure sudden change during vacuumizing so as to protect internal testing equipment; a contact type optical element clamping cold box is arranged in the tested container, is connected with the optical element through a flexible cold chain, and is matched with a liquid nitrogen / gas nitrogen system to realize proportional temperature regulation. The device can safely and truly simulate the extreme environment of a spaceflight deep space, and achieves the stable and accurate testing of all parameters and multiple attitudes of the optical element.

The invention discloses a backlight display data signal processing method, a backlight driving chip and a backlight module, and the backlight driving chip carries out the shaping processing of a received backlight display data signal, obtains a backlight display data signal represented by a square wave, determines a slope adjustment gear based on a received control instruction, and carries out the adjustment of the slope. And adjusting the rising edge and the falling edge of the backlight display data signal represented by the square wave based on the slope adjustment gear to obtain a target backlight display data signal, and sending the control instruction and the target backlight display data signal to a next-stage backlight driving chip. As the target backlight display data signal sent to the next-stage backlight driving chip is the signal obtained after the rising edge and the falling edge are adjusted, the rising and falling speed of the signal can be reduced, EMI can be reduced, and compared with an EMI reduction mode provided by the related technology, the chip size, noise, heat and cost can be reduced.

The application relates to a high-glass-liquid-erosion-resistant electrically-fused zirconia-corundum refractory material and a preparation method thereof, and belongs to the technical field of inorganic nonmetallic refractory materials. The refractory material comprises synergistically modified electrically-fused zirconia-corundum aggregates, electrically-fused zirconia-corundum fine powder, 9,9-bis(4-hydroxy-3-tert-butylphenyl) fluorene, nano silicon dioxide, yttrium oxide and silica sol. The synergistically modified electrically-fused zirconia-corundum aggregates are obtained by constructing a polyphenol-zirconium coordination structure, a dynamic boric ester topological locking structure and a continuous network structure formed by in-situ hydrolysis and polycondensation of organosilicon on the surface of the electrically-fused zirconia-corundum aggregates, and a dense and stable interface barrier layer is further formed in the sintering process. Through the synergistic effect of the interface multiple synergistic network structure and the rigid aromatic reinforcing structure, the glass liquid erosion depth and the element diffusion degree are significantly reduced, the material density and the thermal shock resistance are improved, and the application is suitable for long-term stable service of high-temperature parts of float glass, photovoltaic glass and special glass kilns.

The application relates to a high-efficiency roughening milling head for a glass surface, which comprises a base body, a milling head and a vane wheel; the bottom end of the milling head is provided with a grinding ring, the milling head is provided with a horn-shaped water inlet end, a water storage area and a water flow channel, the vane wheel is arranged below the water storage area, the ratio of atomized water of the vane wheel can be reduced, the cooling water flow is improved, the outer side wall of the grinding ring is provided with a chip removal groove, the inner side wall is provided with a water passage, and the milling head is internally provided with a water flow channel; when the vane wheel transmits a torsion and rotates simultaneously with the milling head, the vane pushes the cooling water to the end face of the grinding ring, then the water is affected by the water passage and applied to the grinding area, and the outer cooling mode is changed into the inner cooling mode; the chip removal speed is improved through the densely arranged outer chip removal groove and the water passage; the problem that the roughness of the roughened glass surface is too low due to the high passivation rate of diamond caused by the grinding heat and the poor self-sharpening property of the milling head is solved through the water passage, the contact area with the glass is reduced, and the problem that the thin glass is softened or broken due to the excessively large applied pressure is avoided.

The invention discloses a method for improving the reliability of a phase delay film and the phase delay film, and belongs to the technical field of optics. According to the invention, the sulfur-sulfur alkyl chain-containing compound is adopted to perform molecular modification on the phase delay film, so that the adsorption and invasion rate of the phase delay film to water molecules can be reduced, and polymer swelling, plasticizing and hydrolysis effects caused by water vapor can be reduced; thermal motion of a polymer molecular chain in a high-humidity and high-temperature environment is inhibited, internal stress release and microstructure change are reduced, and then the problems of phase delay value drift, haze rising and surface physical degradation of the phase delay film in the high-humidity and high-temperature environment are solved; and the optical stability and the mechanical stability of the phase delay film in a high-humidity and high-temperature environment are improved.

The present application relates to a kind of 90ksi grade duplex stainless steel and its preparation method, belong to metal material processing and toughening technical field, solve the technical problems that the existing 25Cr type duplex stainless steel solid solution state strength is insufficient, cold deformation can promote intensity but lead to plasticity and toughness significantly drop and large cross-section component forming difficulty.The 90ksi grade duplex stainless steel, chemical composition includes by mass percent:Cr 24%-26%, Ni 6.0%-7.5%, Mo 2.5%-3.0%, N≤0.32%, C≤0.03%, Si≤1.0%, Mn≤2.0%, the balance is Fe and impurities.The duplex stainless steel prepared by the present application, yield strength is not less than 621MPa, while elongation after break is not less than 17%, reduction of area is not less than 60%, realizes the matching of high strength and good plasticity, is suitable for the forming manufacturing of large cross-section complex shape component.

This invention belongs to the field of building materials technology, and relates to a smart responsive concrete admixture, its preparation method, and its application. The smart responsive concrete admixture includes a main chain and at least one smart responsive side chain and at least one nano-reinforcing side chain bonded to the main chain. The main chain includes polyether structural units and unsaturated carboxylic acid structural units. The smart responsive side chain includes block copolymer temperature-sensitive structural units and calcium ion strongly chelating structural units. Composite nanoparticles are bonded to the nano-reinforcing side chains. From the inside out, the composite nanoparticles consist of a silica core, a soluble calcium source layer, and a silane coupling agent layer. The smart responsive concrete admixture provided by this invention, by introducing smart responsive side chains and nano-reinforcing side chains onto the main chain, can decouple setting time from temperature control, thereby reducing the adiabatic temperature and maximum heat release rate while ensuring early strength.

The application provides a nanocellulose-based edible preservative liquid, a preparation method and a use method thereof. The nanocellulose-based edible preservative liquid comprises a nanocellulose solution, beeswax and glycerol. The preparation method comprises the following steps: mixing the nanocellulose solution, the beeswax and the glycerol according to a proportion and heating to melt the beeswax to obtain a mixed liquid; then, stirring and emulsifying the mixed liquid to obtain a nanocellulose emulsion; finally, performing vacuum defoaming treatment on the nanocellulose emulsion to obtain the nanocellulose-based edible preservative liquid. The application develops an edible and easy-to-wash preservative liquid based on nanocellulose, adopts a dipping coating mode to perform coating film treatment on fruits and vegetables, forms a micro-nano level preservative coating layer on the surface of the fruits and vegetables, can effectively reduce the loss of water and nutrients on the surface and inside of the fruits and vegetables, reduces the gas permeability of the preservative coating layer, and significantly enhances the mechanical strength of the preservative coating layer.

Provided is an aluminum alloy sheet for a can lid, the sheet achieving both high strength and high toughness while blending scrap materials derived from can materials. In one aspect of the present disclosure, the sheet comprises: a Si content of 0.10 mass % or more and 0.60 mass % or less; a Fe content of 0.20 mass % or more and 0.70 mass % or less; a Cu content of 0.10 mass % or more and 0.40 mass % or less; a Mn content of 0.5 mass % or more and 1.2 mass % or less, and a Mg content of 1.1 mass % or more and 4.0 mass % or less, wherein a 0.2% yield strength σ0.2, a tensile strength σB and an average value σfm, of the 0.2% yield strength and the tensile strength satisfy a following formula (1): σfm / σ0.2 / σB≥350MPa

The application discloses a method for controlling the bainite structure component of steel, which comprises the following steps: S1, controlling the parameters of the hot rolling process of the steel billet, including reducing the opening rolling temperature by 50-100 DEG C, reducing the rolling speed by 3-10%, and water cooling between the rolling mill racks to form a low final rolling temperature; and S2, after the final rolling is completed, forcibly cooling the rolled piece at a cooling speed of 50 DEG C / s-300 DEG C / s, so that the temperature of the rolled piece rapidly enters the two-phase region or even below the Ac1 line, thereby slowing down or inhibiting the dynamic recrystallization process of the deformed austenite, and making the cooling curve "chase" the continuously right-moving pro-eutectoid ferrite line. By adopting the technical scheme of the application, a significant amount of ferrite component can be obtained for the bainite steel under the hot rolling condition, that is, a ferrite+bainite complex phase structure with different proportions is formed, so that the strength and the toughness and plasticity of the steel can be regulated in a large range.

The invention relates to a flame-retardant smoke-suppression anticorrosive fiber material, a coating, a preparation method of the flame-retardant smoke-suppression anticorrosive fiber material and the coating containing the fiber material, and belongs to the technical field of functional coating materials. The preparation method of the fiber material comprises the following steps: (1) mixing and stirring a flame retardant, an organic solvent and a surfactant to obtain a core layer solution; (2) dispersing polyvinylidene fluoride-trifluoroethylene and inorganic nanoparticles in an organic solvent, and stirring to obtain a shell solution; and (3) simultaneously spinning the core layer solution and the shell layer solution to obtain the fiber material. After the coating of the fiber material is cured on the surface of a base material, a formed coating is a continuous fiber reinforced composite material and has flame-retardant, smoke-suppression, self-repairing and anti-corrosion properties at the same time. The inorganic nanoparticles are introduced into the shell layer and the thermal response type flame retardant is encapsulated in the core layer, so that the chemical activity or toxicity of harmful chemical substances is reduced through chemical adsorption, coordination binding and / or catalytic conversion under a fire or corrosion induction condition, and the flame-retardant smoke suppression, self-repairing and corrosion-resistant properties are synergistically realized.

The application provides a glass grinding and cleaning wastewater recycling device, which comprises a cleaning frame and a recycling pool, a plurality of drainage pipes are fixedly connected to the side of the cleaning frame, the recycling pool is on the ground on one side of the cleaning frame, and a plurality of coarse filter assemblies and a plurality of standby filter assemblies are further included. The coarse filter assemblies and the standby filter assemblies below the coarse filter assemblies are connected in parallel, when a coarse filter assembly is blocked and needs to be cleaned, the standby filter assembly below the coarse filter assembly can be automatically or manually switched to a working state to temporarily filter the wastewater, so that the blocked coarse filter assembly can be cleaned offline without affecting the normal work of other filter units, the continuity of the entire wastewater recycling process is ensured, and the utilization rate and the processing efficiency of the device are significantly improved.

This invention provides a high-temperature expansion thermal insulation composite material, its preparation method, and its application. The composite material comprises the following parts by weight: 30-50 parts of functionalized acrylate emulsion, 25-40 parts of expandable graphite, 45-60 parts of flame retardant, 15-25 parts of nano-inorganic filler, 1.5-2.5 parts of alkylphenol polyoxyethylene ether phosphate diester salt, 1-2 parts of dimethyl polysiloxane, 15-35 parts of water, and a substrate: a protective film layer. This invention uses functionalized acrylate emulsion as the matrix and, through innovative multi-component composite system, achieves multi-mechanism flame retardant and fireproof effects, ultimately obtaining a high-strength, high-fireproof, and high-thermal-insulation high-temperature expansion thermal insulation composite material. During use, this composite material can adhere well to the top cover and base of a lithium-ion battery casing, placed within the inner layer of the battery casing. It can be composited with unsaturated resin systems or interlayers to prepare battery casing composite materials, reducing vehicle weight, replacing aluminum alloy battery casings, and meeting the fireproof requirements of new energy vehicle battery casings.

The present invention provides an electroplating apparatus and method for prolonging the service life of a circulating electroplating solution by isolating external oxygen. The apparatus includes: an open electroplating tank; a sealed liquid storage tank with electroplating solution stored therein, injected with N2 and maintained at a preset pressure; a liquid injection, reflux and overflow pipeline connecting the electroplating tank and the liquid storage tank, with U-shaped liquid seals provided on both the reflux and overflow pipelines; an N2 pipeline for providing an oxygen-isolated environment for the electroplating solution reflux channel; a bypass pneumatic valve for opening after the N2 pipeline releases N2 to balance the N2 pressure in the liquid storage tank. The present invention innovatively proposes a brand-new open electroplating tank body device structure and electroplating solution circulation system. By controlling the N2 pipeline and using the U-shaped liquid seal, the air in the reflux and overflow pipelines can be discharged and the overall system can be helped to isolate air and oxygen. With the help of the bypass pneumatic valve, etc., the pressure generated by the input of N2 into the liquid storage tank can be balanced, enabling the reflux electroplating solution to flow back to the liquid storage tank by gravity. Moreover, the maintenance of the N2 pressure in the liquid storage tank can maintain a zero or low oxygen environment.

The application discloses a preparation method of a vanadium-doped carbon composite back contact layer and application of the vanadium-doped carbon composite back contact layer in preparation of a cadmium telluride solar cell. The method comprises the following steps: firstly, performing a coordination reaction on a vanadium source compound and a carbazole monomer to obtain a vanadium-doped carbazole polymer; secondly, dissolving and coating the polymer on a surface of a cadmium telluride light absorption layer; and thirdly, performing gradient annealing treatment on the polymer to convert the polymer into the vanadium-doped carbon composite back contact layer in situ. During the gradient annealing process, selective rupture of coordination bonds of the polymer is caused, and vanadium ions released from the polymer preferentially diffuse along cadmium telluride grain boundaries to form a local P + Doped region; At the same time, the polymer main chain is carbonized to form a dense conductive network similar to graphene. The prepared back contact layer has high conductivity and high efficient hole transport function, can effectively control the contact potential barrier between the cadmium telluride light absorption layer and the back electrode, and improves the injection and collection efficiency of holes.

This invention relates to the field of highway engineering technology, and provides a design method and a method for asphalt mixtures that maintain long-term skid resistance. The method includes the following steps: testing the basic characteristics of multi-lithological aggregates and constructing an aggregate characteristic database; controlling the volumetric blending ratio of the mixed aggregates based on the volumetric method; initially selecting mixed aggregate combinations based on the differences in polishing effects and complementary performance principles of mixed aggregates from different lithologies, and setting a blending ratio gradient; conducting abrasion and polishing tests on the initially selected mixed aggregates, and determining the optimal combination based on the experimental results; designing and verifying the mix proportion of the asphalt mixed aggregates based on the optimal combination; and determining the final mix proportion based on the experimental results through balanced optimization. This approach helps guide the rational selection and optimized mix proportion of mixed aggregates, ensuring the long-term, stable maintenance and even improvement of skid resistance, while simultaneously achieving the goals of saving high-quality aggregates and controlling and reducing costs in the anti-skid surface layer of asphalt pavements.

An ultrasound imaging system is described. The system comprises: a first apparent point-source transmit transducer that is shaped as a spherical section having a spherical center point and is configured to transmit a three-dimensional semi-spherical pulse into a target object to be imaged; a first plurality of receive transducer elements that are configured to receive echoes of the three-dimensional semi-spherical pulse; a second plurality of receive transducer elements that are configured to receive echoes of the three-dimensional semi-spherical pulse; and a controller. The controller is configured to control transmission of the three-dimensional semi-spherical pulse and to determine a position of reflectors within the object based on a known position of the spherical center point of the apparent point-source transmit transducer, known positions of the elements of the first and second pluralities of receive transducer elements, a time at which the three-dimensional semi-spherical pulse was transmitted, and times at which the echoes are received.

This application relates to the field of semiconductor material growth technology, aiming to solve the technical problems in the prior art, such as reduced heating element lifespan due to a single shared atmosphere, numerous crystal defects making quality assurance difficult, and high single crystal production costs but low production efficiency. The single crystal growth apparatus disclosed in this application is characterized by comprising a furnace body, a first chamber, a second chamber, a heating component, a growth component, an atmosphere isolation and heat conduction component, an atmosphere management system, and a central control system; the atmosphere isolation and heat conduction component is used to divide the furnace body into a hermetically isolated first chamber and a second chamber and to efficiently transfer heat. By adopting the above solution, this application can achieve atmosphere structure separation and a combined crucible design, effectively extending the lifespan of the heating element while ensuring high crystal quality and purity, and significantly reducing operating costs.