56results about How to "Reduce the introduction" patented technology

The utility model relates to a chloroacetic acid production device for processing glycine, which is characterized in that an interlayer is arranged in the outer wall of a chlorination kettle, the side end is connected with a liquid level meter a, and a discharge pipe is arranged on the lower surface; a radar liquid level instrument, a chlorine feeding pipe, an on-line component analyzer, an on-line thermometer, an on-line hydrometer, a condensation pipe, a catalyst filling pipe and an acetic acid feeding pipe are sequentially arranged on the upper surface, the lower end of the chlorine feeding pipe is connected with a gas distributor, and the condensation pipe is externally connected with a condenser; the catalyst filling pipe is externally connected with a catalyst metering tank; a liquid level meter b is connected to the side end of the kettle body, a discharging pipe is arranged on the lower surface of the kettle body, a water supplementing pipeline is connected to the right side of the upper surface of the kettle body, a liquid inlet pipe and an online moisture measuring device are arranged on the left side of the upper surface of the kettle body, and the liquid inlet pipe is communicated with the discharging pipe; the upper end of the stirrer is connected with a stirring motor, and the lower end is connected with a frame-type stirring paddle; the utility model has the advantages of reasonable structural design and good use effect.

This invention relates to the field of polyethylene insulation materials and discloses a polyethylene cable insulation material and its preparation method. The method includes: (1) blending an antioxidant, an anti-scorching agent, and low-density polyethylene by gravity metering, extruding, and then water-cooling and pelletizing to obtain granules; (2) preheating the granules by gravity metering and then sequentially mixing and impregnating them with a peroxide; the anti-scorching agent is 1,1-diphenylethylene and / or 2,4-diphenyl-4-methyl-1-pentene. The method provided by this invention can prepare a polyethylene cable insulation material with anti-scorching properties and high cleanliness. Furthermore, the performance of ultra-high voltage polyethylene cables above 110KV produced using the polyethylene cable insulation material provided by this invention is stable, and the scorching time is longer. Therefore, the polyethylene cable insulation material provided by this invention is suitable for the production of long-cycle cables.

The present application relates to the field of data processing, and particularly relates to a user travel behavior label identification method and device, the method comprising: obtaining target user information and converting into a user feature vector; determining a travel behavior label corresponding to the user feature vector based on a plurality of preset travel behavior labels respectively corresponding to a plurality of determination conditions and a plurality of travel behavior label prediction models; if the user feature vector and any determination condition have a preset association relationship, then the travel behavior label corresponding to the determination condition is taken as the result; otherwise, the user feature vector is input into the plurality of travel behavior label prediction models, and the result is determined according to the model output. The present application sets different key feature subsets as determination conditions for different travel behaviors, and combines the two-stage architecture of rule priority and model bottoming, thereby ensuring the identification accuracy, reducing the calling frequency of complex models, and improving the overall identification efficiency.

The application discloses a synthesis and separation process of high-purity 3-methyl-5-phenylpentanol. The process comprises the following steps: condensation dehydration reaction, washing, neutralization and phase state enrichment, intermediate separation and modifier loading, selective hydrogenation ring opening, product refining and selective physical separation, and the whole process adopts a double-effect steric hindrance type polymerization modifier. The hindered amine derivative captures carbon center active free radicals to inhibit thermal polymerization of carbon-carbon double bonds in the condensation dehydration reaction; in the washing, neutralization and vacuum rectification, the hindered amine derivative is enriched in the intermediate material and enters the selective hydrogenation ring opening through desalination and free state and high-boiling characteristics; on the surface of the hydrogenation catalyst, the hindered amine derivative divides and continuously occupies a large number of active sites, limits the flat adsorption of the benzene ring multi-site, and makes the reaction only occur carbon-carbon double bond reduction and oxygen-containing heterocyclic ring opening. The application realizes the synergistic control across the reaction stages by using a single material, and improves the product purity and molar yield.

This invention discloses a highly corrosion- and weather-resistant silicate glass material and its preparation method, comprising the following components by weight: 60-80 parts of a main network component, which forms a silicon-oxygen network framework after melting; 5-15 parts of a network-modifying component, which is distributed within the silicon-oxygen network framework; 5-12 parts of a lattice-stabilizing component; 2-8 parts of a compacting reinforcing component; and 3-10 parts of a lattice-strengthening component, which are dispersed within the silicon-oxygen network framework to form a dense silicate glass matrix. This invention can improve the weathering resistance, groundwater erosion resistance, and long-term structural stability of the glass material, and enhance the internal purity and density of the glass matrix, meeting the needs of deep underground burial and long-term information preservation applications.

This invention belongs to the field of sodium-ion battery cathode material technology, and its purpose is to provide a new synthetic technique and process for preparing sodium iron pyrophosphate composite cathode materials using an anhydrous precursor, as well as its application. This patented technology aims to overcome several key problems existing in traditional preparation processes, including the reduction in material crystallinity caused by the evaporation of water of crystallization during calcination, the poor thermal stability of sodium iron sulfate, and the low electronic conductivity of sodium iron pyrophosphate. To effectively address these challenges, this patented technology innovatively proposes a method for preparing bio-carbon-coated Na2Fe2P2O7SO4 composite cathode materials using an anhydrous precursor. This preparation method utilizes iron phosphate as a raw material, optimizes the material synthesis process, and has high feasibility and operability. Experimental results show that this composite material exhibits excellent discharge specific capacity and cycle stability, indicating its promising application prospects in the future energy storage field.

This invention provides an automatic target switching device, comprising: a housing assembly, a target wheel assembly for switching targets, a servo motor assembly for controlling the rotation of the target wheel assembly, a transmission assembly for supporting the target wheel assembly, and a control assembly. This invention uses multiple target wheel units installed side-by-side, reducing the size of the switching device, and the number of target wheels can be selected according to actual needs. The selection of the target wheel and the precise switching and adjustment of the target can be achieved by driving two servo motors to rotate through the control unit, eliminating the need for manual replacement or adjustment and reducing the introduction of subjective errors. This invention has a simple structure and provides connection interfaces for use with different collimators or light sources, offering strong expandability. This invention has high overall switching efficiency, a high degree of automation, and strong applicability, meeting the needs of optical parameter detection in telescope systems and performance testing of various other optoelectronic devices.

The application discloses a kind of core-shell structure nanometer powder toughened zirconia ceramics and preparation method thereof, belong to ceramic material technical field, the method includes using three-dimensional network gel to realize washing-free co-precipitation method to prepare high-activity, ZrO2@SiO2Core-shell structure nanometer zirconia raw material powder, and stable agent is mixed ball milling, drying, sieving, shaping, cold isostatic pressing and gets green body, green body is placed in vacuum furnace and sintering, annealing and obtains toughened zirconia ceramic target product, realizes the efficient preparation of jade quality feeling simulation ceramic tooth of integral penetration.The application avoids the repeated washing steps of precursor in the traditional co-precipitation preparation process, reduces the introduction of impurities, the sintering temperature is lower, the powder yield is high, the process is simple, the cost is low, and is suitable for the industrial production of toughened zirconia ceramics.

The application provides a modified conductive carbon, a slurry, a positive electrode, a battery and a preparation method thereof, the modified conductive carbon, wherein 0.05wt%-0.1wt% of F elements are doped. Compared with unmodified conductive carbon, the modified conductive carbon has an open pore structure. The modified conductive carbon is prepared by fluorination treatment of graphene oxide with sodium 2,2,3,3-tetrafluoropropionate as a fluorine source and phosphoric acid immersion treatment. The application improves the problem of water introduction in the positive electrode slurry, can stabilize the viscosity of the positive electrode slurry in air, and improves the electrical properties such as the resistance, charge and discharge life of the battery, and improves the chemical stability of the positive electrode slurry of the sodium ion battery in air.

This invention relates to a process for preparing ammonium sulfate and sodium bicarbonate and / or sodium carbonate from a mixture of chemical salts and nitrates. The process includes the following steps: (1) washing the mixed salts to purify Na₂SO₄; (2) a metathesis reaction to generate NaHCO₃; (3) washing to obtain sodium bicarbonate, optionally calcining to generate Na₂CO₃; (4) deammoniation; (5) primary evaporation to recover sodium sulfate; and (6) secondary evaporation to prepare ammonium sulfate. Using the method of this invention, sodium bicarbonate and / or sodium carbonate and ammonium sulfate products with comparable or even higher purity can be prepared with significantly lower energy consumption than existing technologies such as cold or hot methods. Furthermore, compared to the case where the mixed salts are directly subjected to a metathesis reaction without washing, the prepared sodium bicarbonate and / or sodium carbonate and ammonium sulfate products have significantly higher purity.

The present application provides a kind of truss support equipment for supporting steel structure floor support plate and its application method, by being designed as including: a truss and two support power components, two support power components are respectively detachably mounted on two adjacent H-shaped steel beams;Each support power component includes: power device and support component hoisted on power device, power device is detachably mounted on a H-shaped steel beam;After support component hoisted to work surface under the drive of power device, support component is connected with truss installation, under the cooperation of support component and corresponding side H-shaped steel beam, truss is supported and fixed between two H-shaped steel beams, to support steel structure floor support plate.The whole support fixing process of steel structure floor support plate is automatically completed construction surface in position and support construction, the whole process does not need to occupy tower crane hoisting, support equipment installation process is simple, saves manpower and material resources, reduces construction safety risk.

The utility model relates to the technical field of silica gel mixing, and discloses a kneading and stirring device with a cover opening mechanism, which comprises a frame, a case, a cover, a stirrer, a controller, a vacuum device and the cover opening mechanism, the case, the stirrer, the controller and the cover opening mechanism are mounted on the frame, the driving end of the cover opening mechanism is connected with the cover, and the cover opening mechanism is connected with the vacuum device. The cover opening mechanism is used for opening or closing the machine cover, the stirring end of the stirrer is arranged in the machine box, the vacuum device is arranged on the machine cover and used for vacuumizing the interior of the machine box after the machine box is tightly covered with the cover, and the control end of the controller is electrically connected with the control end of the stirrer, the control end of the vacuum device and the control end of the cover opening mechanism. According to the device, introduction and doping of air impurities can be reduced, and discharging of mixed silica gel is facilitated. A material door and a discharging table are matched with each other, so that silica gel materials can be conveniently discharged; the combination of the vacuum device and the case is adopted, so that air in the case can be vacuumized by the vacuum device, and introduction of air impurities is reduced.

The application provides a method for determining single singular point vortex phase topological charge and singular point position. Step one: a variable size non-circular symmetric diaphragm and a 4f system are added at the rear end of a to-be-measured light field; step two: a camera is moved along an optical axis to collect two light intensity images, and an axial differential of the light intensity is calculated; step three: a singular point position is determined based on a phase correlation iteration method; and step four: a vortex phase topological charge is iteratively calculated. The application can reduce the complexity of a traditional system for determining singular point vortex phase topological charge and singular point position, reduce the introduction of phase errors, and reduce system cost. In addition, the application only needs to collect two near-field light intensity images to determine single singular point vortex phase topological charge and singular point position.

This utility model relates to a hopper screening structure and a screening hopper, belonging to the field of material screening technology. The technical solution includes a hopper, a rotating shaft, and a screening plate. The hopper is provided with a material bin, a conical bin, and a discharge pipe from top to bottom. The rotating shaft is provided with a radial brush rod with bristles in the middle and an axial extension with a scraper at the bottom. The screening plate is an annular structure with screen holes, its outer edge is fixed to the inner wall of the hopper, and its inner edge is supported by the rotating shaft. The bristles contact the upper surface of the screening plate, and the scraper is adapted to the inner wall of the conical bin and supports the rotating shaft. The rotating shaft is driven to rotate by a drive mechanism to realize dynamic screening of materials and smooth discharge. It is mainly used to improve screening efficiency and reduce manual intervention.

The invention discloses Ti-based alloy powder, which is prepared from the nominal components in percentage by atom: (5 to 10) of Ti, (2 to 5) of Al, (1 to 3) of V, (0.5 to 2.0) of Y2O3 and the balance of Ti and inevitable impurities, the preparation method comprises the following steps: 1, weighing raw material powder; 2, charging and sealing; 3, ball milling; and 4, discharging to obtain Ti-based alloy powder. According to the Ti-based alloy powder disclosed by the invention, high-volume nano Y2O3 is introduced and uniformly dispersed in a Ti matrix to form a dispersion strengthening phase, so that the room-temperature and high-temperature strength, creep resistance and thermal stability of the alloy are improved; according to the mechanical alloying process, the ball-to-material ratio, the rotating speed and the time of ball milling are strictly controlled, intermittent ball milling and external cooling are adopted to control temperature rise and pollution, it is guaranteed that Y2O3 forms nanocrystalline and a dispersion strengthening phase in a Ti matrix, the strength, hardness and thermal stability of the alloy are improved, the process is controllable, and repeatability is good.

This invention relates to the field of uranium resource technology, and more particularly to a direct reduction and conversion system for depleted uranium hexafluoride and its method of use. It includes: a liquid sodium supply unit for providing molten liquid sodium; a gaseous DUF6 supply unit for providing DUF6 that has been heated and stabilized to a gaseous state; a sodium thermal reduction reaction unit connected to both the liquid sodium supply unit and the gaseous DUF6 supply unit, wherein the liquid sodium and gaseous DUF6 react in the sodium thermal reduction reaction unit; a product separation unit connected to the sodium thermal reduction reaction unit for separating and classifying the solid products generated in the sodium thermal reduction reaction unit; and a tail gas recovery unit connected to the sodium thermal reduction reaction unit for condensing the gas discharged from the sodium thermal reduction reaction unit to obtain condensate, collecting sodium vapor and other volatile substances in the gas, purifying the gas, and discharging it after testing to ensure it meets emission standards. This method has a simple process, optimized reaction conditions, and is easier to implement.

The invention relates to the technical field of collagen preparation, and discloses a method for extracting collagen from jellyfish by using a salt method, which comprises the following preparation steps: 1, sample treatment; step 2, homogenizing; 3, performing ultrasonic treatment; step 4, extracting; (5) centrifuging; step 6, performing ultrafiltration; and 7, freezing and freeze-drying. According to the method, collagen prepared from jellyfish is dissolved in 0.1 mol / L, 0.2 mol / L, 0.5 mol / L, 1.0 mol / L, 1.5 mol / L and 2.0 mol / L sodium chloride, sodium acetate, sodium citrate and phosphate solutions respectively, an aqueous solution serves as blank control, the optimal salt solution type and concentration of the jellyfish collagen are screened out, results show that the solubility of the jellyfish collagen in the 0.1 mol / L-0. 2 mol / L sodium chloride solution is the maximum, and on the basis of the conclusion, the optimal salt solution type and concentration of the jellyfish collagen can be obtained. And extracting and purifying by combining ultrasonic extraction and ultrafiltration to obtain the collagen. According to the method provided by the invention, the extraction time can be shortened, the cost is saved, the introduction of impure protein is reduced, and the influence on the complete structure of collagen is reduced.

The invention belongs to the technical field of nickel-based high-temperature alloy smelting, and relates to a method for preparing a low-aluminum-content GH3535 master alloy through vacuum induction smelting. The preparation method comprises the following steps: preparing a vacuum induction furnace from high-purity fused magnesium oxide; adding metal raw materials corresponding to Ni, Fe, Mo, Cu and Co into the vacuum induction furnace for melting down; then adding a raw material C, smelting and carrying out electromagnetic stirring to obtain a first melt; a Cr raw material is added into the first melt, argon and an oxidizing agent are sequentially added after melting down, then smelting and electromagnetic stirring are conducted, and a second melt is obtained; adding the raw material C into the second melt again, and performing smelting and electromagnetic stirring to obtain a third melt; adding raw materials corresponding to C, Si, Mn and Ti into the third melt, and performing smelting and electromagnetic stirring to obtain a fourth melt; and after gas in the fourth melt is completely separated out, vacuum pouring is conducted, and finally the GH3535 master alloy with the low aluminum content can be obtained.

The utility model discloses a zoom projection lens which comprises a first lens assembly, a second lens assembly, a third lens assembly, a diaphragm, a fourth lens assembly and a fifth lens assembly which are sequentially arranged along a direction from an object space to an image space. A full-group linkage zoom design is adopted, and the first lens assembly is set as a zoom group for changing the focal length of the projection lens; the second lens assembly, the third lens assembly, the fourth lens assembly and the fifth lens assembly are arranged to be a compensation group used for offsetting the image surface position change caused by the movement of the zoom group. When zooming is carried out from the telephoto end to the wide-angle end, the distance between the second lens assembly and the third lens assembly is gradually increased. According to the utility model, the space occupied by the lens is reduced, so that the lens can adapt to the working condition of a compact installation space, the lens can maintain excellent imaging performance at different focal lengths within the working temperature range of a special application scene, and the flexible adaptability of the zoom projection lens is improved. The utility model also provides a projection system.

The utility model relates to the field of recovery equipment, in particular to electrolytic manganese residue recovery equipment which comprises a mounting table, a feeding hopper, a crushing box, a screening and filtering box and a high-temperature recovery furnace, the top end of the mounting table is provided with the feeding hopper used for feeding materials into the device, one end of the mounting table is provided with the crushing box used for crushing the materials, and one side of the crushing box is communicated with the screening and filtering box used for removing impurities and metal ions; one side of the screening filter box is communicated with a high-temperature recovery furnace for heating and recovering materials, the lower part of the exterior of the screening filter box is communicated with a sedimentation tank, one end of the sedimentation tank is communicated with a chemical filter box, the top end of the chemical filter box is communicated with a circulating pipe, and the other end of the circulating pipe is connected to the screening filter box; a complete water circulation path is constructed, so that water used in the links of screening, cleaning and the like can be sequentially subjected to precipitation, chemical filtration and the like and then returns to the screening and filtering box to participate in cyclic utilization, and the loss of water resources is reduced.

The invention relates to a device and a method for tightly and efficiently arranging composite glass fibers, the device comprises a plate arranging mold, multifilament fibers are placed in the plate arranging mold, the plate arranging mold is placed on an electromagnetic vibration table, and the electromagnetic vibration table is connected with a controller. And a magnifying lens connected with the display screen is arranged above the plate arranging mold. The method comprises the steps that multifilament fibers are put into a plate arranging mold for blank plate arrangement, a controller is started when 4-6 layers are arranged every time, an electromagnetic vibration table is made to vibrate, the plate arranging mold is driven to vibrate up and down at the set frequency and amplitude for preset time, the multifilament fibers are vibrated at a certain frequency, the position is adjusted, and a close packing state is achieved; and the blank plate structure is displayed in real time through a display screen connected with the magnifying lens, after the current blank plate structure is adjusted, the controller is turned off, and the multifilament fiber row plate continues to be placed in. By means of the arrangement device and method, the phenomena of multifilament fiber dislocation and structure holing can be reduced, the internal cleanliness of the blank plate is improved, and the plate discharging efficiency is improved.

The invention discloses a lithium battery positive plate stripping and recycling method, and belongs to the technical field of battery recycling. The recycling method comprises the following steps: shearing the waste ternary positive plate to obtain first positive plate fragments; immersing the first positive plate fragments into a solution containing a monomer and an initiator, and enabling the solution to completely permeate into the first positive plate fragments to obtain second positive plate fragments; after in-situ polymerization, carrying out mechanical crushing and sorting to respectively obtain positive electrode black powder and a positive electrode current collector; wherein the waste ternary positive plate comprises a positive current collector and a positive material layer arranged on at least one surface of the positive current collector. According to the invention, the separation of the positive electrode active material layer and the positive electrode current collector is realized through the combination of interface in-situ embrittlement and mechanical crushing, and the problem that the recovery of the positive electrode material cannot meet the requirements of high yield, high purity and low damage at the same time is solved.

A vehicle control method and device, vehicle-mounted equipment and storage medium are disclosed, relating to the technical field of vehicle control. The method comprises: acquiring the cooling liquid temperature, intake temperature, ambient temperature, exhaust temperature and basic exhaust gas recirculation rate of an engine in a vehicle; determining a first correction coefficient according to the cooling liquid temperature, intake temperature and ambient temperature, and determining a second correction coefficient according to the exhaust temperature and ambient temperature; adjusting the basic exhaust gas recirculation rate to obtain a target exhaust gas recirculation rate according to the first correction coefficient and the second correction coefficient, and controlling the engine according to the target exhaust gas recirculation rate; and the target exhaust gas recirculation rate is lower than the basic exhaust gas recirculation rate. According to the scheme, the double correction coefficients are determined based on the multi-dimensional temperature parameters, the exhaust gas recirculation rate is dynamically adjusted, the generation of condensate water is actively inhibited from the source, the engine is prevented from being damaged by the condensate water entering the cylinder, and the operation reliability is improved.

The application discloses a winding tool for a gyro optical fiber ring and a winding method thereof, and relates to the technical field of optical fiber ring production. The application comprises a winding drum and a drum fastening device. The winding drum comprises a drum body and a side disc. A notch is arranged at the surface edge of the side disc. A flange part is arranged at the side edge of the notch. A multi-stage telescopic rod is fixed to the inner side of the flange part. A soft pressing base is fixed to the bottom end of the multi-stage telescopic rod. The notch is used for the light fiber to give way when the turns are excessive. The soft pressing base can press the excessive area of the light fiber. The stability of the excessive area is ensured. The introduction of stress when the light fiber layers are changed and the turns are changed is reduced. The symmetry of the arranged light fiber is improved. The transition area formed by the two winding directions is controlled within 10 mm. The transition area is accurately controlled. The internal stress of the optical fiber ring is greatly reduced. The overall performance is better. The arrangement of the light fiber is ensured.

This invention provides a method for preparing and applying a trifluoromethoxyamide-bridged aromatic amine compound. The preparation method utilizes a continuous flow reaction system comprising two continuous flow reaction units connected in series, namely reaction unit A and reaction unit B. An amidation reaction is carried out in reaction unit A, and a reduction reaction is carried out in reaction unit B. The prepared trifluoromethoxyamide-bridged diamine compound exhibits high purity and whiteness and can be used to prepare polyimides for various electrical and optical components.

The application discloses a semi-supervised HRRP noise label filtering method based on early learning guidance, comprising the following steps: constructing an HRRP training data set and a deep neural network model; pre-training the deep neural network model; predicting the HRRP training data set by using the pre-trained network model and dividing the HRRP training data set into two data sets according to the confidence; constructing a known label data set and an unknown label data set to form a semi-supervised training data set and performing data enhancement; semi-supervised training the network model by using the enhanced data; generating the label of the unknown label data set by using the semi-supervised trained network model and fully supervised training the network model; and target recognition of the HRRP data by using the fully supervised trained network model. The application uses a generalized cross-entropy loss function in the early learning training stage of the model, proposes a data enhancement scheme suitable for HRRP, can better reduce the influence of noise labels on the model, and has better stability and implementability.

This invention discloses a method for preparing Zr-2.5Nb alloy by hot-pressing sintering coarse-grained pre-alloyed spherical powder below the β phase transformation temperature. The method includes: 1. Selecting coarse-grained spherical Zr-2.5Nb alloy pre-alloyed powder prepared by the plasma rotating electrode method as raw material; 2. Placing the raw material into a mold and placing it in a hot press furnace under vacuum; 3. Heating to a temperature below the β phase transformation temperature of Zr-2.5Nb alloy and holding at that temperature for hot-pressing sintering; 4. Cooling to room temperature to obtain a dense Zr-2.5Nb alloy. This invention utilizes the characteristics of coarse-grained spherical Zr-2.5Nb alloy pre-alloyed powder—namely, its fine grain structure, crystal defects, and metastable α′ martensitic phase transformation activity—to achieve efficient densification at lower temperatures and suppress grain coarsening, resulting in a Zr-2.5Nb alloy material with uniform structure, high density, and excellent overall performance, suitable for the field of biomedical implants.

The application discloses a polycyclic compound and an organic electroluminescent device containing the same. The compound structure is shown as formula I, which is a boron-nitrogen material with a planar structure. By introducing a bridged cycloalkyl group, the rigidity of the polycyclic compound is increased, and the introduction of a π electron-containing structure is reduced, so that the π-π mutual attraction in the molecule is minimized. The compound has similar molecular vibration modes and energy levels as existing boron-nitrogen materials, avoids the occurrence of red shift of the emission wavelength, and has a narrow emission spectrum and a half peak width. The compound is suitable for a blue host / dopant system in a blue series of AM-OLED and an organic electroluminescent device. The organic electroluminescent device containing the compound has a high external quantum efficiency, and the lifetime performance is particularly excellent.

The invention belongs to the technical field of preparation of inorganic non-metallic materials, and particularly relates to a preparation method of high-purity opaque quartz glass. The method comprises the following steps: by taking high-purity silica sol with impurity content of less than 1ppm as a raw material, compounding silica sol with various particle sizes in proportion, concentrating under reduced pressure until the content of silicon dioxide is 40-60%, adding an acrylamide gel enhancing system into the compounded sol, controlling the temperature to gelatinize the compounded sol, and preserving heat to improve the gel strength; and drying the wet gel at a low temperature of 60-80 DEG C and a relative humidity of 80-95% until the moisture content is less than 5%, then carrying out normal pressure dehydration, organic matter removal and presintering treatment on the dried gel blank, placing the presintered blank in a graphite container, and melting and preserving heat at 1400-1650 DEG C under the protection of nitrogen for 2-8 hours to obtain the non-quartz glass. And the pore size and density can be controlled by regulating and controlling the melting temperature and the heat preservation time. The total impurity content of the quartz glass prepared by the method is less than 5ppm, the structure is uniform, the density can be adjusted in a range of 1.8-2.1 g / cm < 3 >, and the quartz glass has good shading and heat-insulating properties.

This invention proposes a radar-camera 3D target detection method and device based on semantic awareness enhancement. The method includes: extracting features from multi-view camera image data; projecting the extracted image features onto a bird's-eye view space to generate camera BEV features; converting millimeter-wave radar point cloud data into radar BEV features; obtaining enhanced radar BEV features through a sequential window attention operation; predicting foreground confidence for non-empty positions in the enhanced radar BEV features and calculating the semantic radar cross section (SCR), using this area as the feature diffusion range to obtain dense radar BEV features; fusing the camera BEV features and the dense radar BEV features to obtain fused BEV features; and performing target detection based on the fused BEV features to output 3D detection results. A corresponding device is also proposed based on this method. This invention achieves simultaneous improvements in target detection accuracy, robustness, and practical efficiency.