6400results about How to "High density" patented technology

The invention provides a complex geothermal system digital twinning online experiment method based on multi-source data deep fusion, and solves the problems of precise construction of geothermal system digital twinning and low-delay visualization of virtual-real interaction. The method comprises the following steps: firstly, building a typical geothermal reservoir multi-source heterogeneous data parallel acquisition system, and carrying out fine inversion, high-precision identification and continuous correction on geothermal reservoir parameters by using a large amount of field experiment test data; then, a complete physical model of the geothermal system is established, online simulation is conducted on an actual system through high-performance scientific calculation, and mutual calibration is conducted on the actual system and test data; and finally, building a geothermal system digital twinning on-line experiment platform based on real-time acquired test data, a reliable mechanism model and an artificial intelligence method, and realizing accurate measurement and on-line monitoring of a geothermal exploitation process and iterative evolution of a geothermal reservoir exploitation scheme. According to the method, multi-source data of the geothermal system are deeply fused, high-precision online simulation and low-time-delay virtual-real interaction in the geothermal experiment process are achieved, and geothermal storage and exploitation details can be comprehensively transparentized. And furthermore, intelligent and rapid inversion is performed on the multi-scale seepage and heat transfer process of the geothermal reservoir by carrying out a virtual online experiment, so that the scientificity and efficiency of full-life-cycle geothermal exploitation are greatly improved. Meanwhile, a multi-agent collaborative optimization regulation and control framework provided by the method has relatively high expandability and flexibility, and an optimal well spacing design scheme and an optimal experiment scheme of the geothermal well group can be automatically excavated through adaptive optimization and iterative evolution of a system regulation and control strategy; and the method has a very strong application prospect in the distributed optimization field of the geothermal storage virtual experiment.

The invention relates to the technical field of three-dimensional modeling, and provides a satellite three-dimensional reconstruction method in a complex illumination environment, which comprises the following steps: acquiring images under different illumination conditions, and extracting image features by combining multi-view collaborative observation; performing feature point and multi-view data registration, generating a three-dimensional model and analyzing illumination change; performing system initialization by using the initially matched feature points, and establishing an initial three-dimensional point cloud model; sparse point cloud is recovered through multi-view stereoscopic vision, and motion recovery is carried out; a 2D diffusion model is used to complement the shielded area, and laser radar data is combined to carry out densification processing on the sparse point cloud; a three-dimensional grid model is generated, and texture mapping is carried out by a multi-view image; light compensation is adopted, a polarized light separation technology is used, and ambient light and specular reflection light are separated; according to the method, through multi-view-angle collaborative observation, the shielding problem under a single view angle is reduced, the 2D diffusion model is used for complementing the shielded area, and the completeness and precision of three-dimensional reconstruction are ensured.

The invention relates to the technical field of image processing, and provides a vertebral body three-dimensional reconstruction method based on image segmentation, and a bone detection method and system.The method comprises the steps that firstly, an SAD-UNetR image segmentation model capable of achieving accurate segmentation of an image target is constructed through improvement of a Swinin-UNetR network, three-dimensional modeling is conducted on the basis of an accurate segmentation image, and a three-dimensional reconstruction model is obtained; an accurate three-dimensional model of a vertebra structure can be obtained; based on an accurate segmentation result, a bone mineral density prediction regression model is provided at the same time, bone substances are identified based on multi-instance learning and an attention mechanism, a bone substance classification result and bone mineral density data can be provided, intelligent assistance is provided for diagnosis of doctors, radiation risks, economic consumption and time consumption caused by special bone mineral density measurement are avoided, and the accuracy of bone mineral density measurement is improved. Measurement means of bone detection are expanded, and the method has a wide application prospect.

The embodiment of the invention discloses an in-memory computing circuit based on a magnetic cache, and the circuit comprises at least one magnetic cache unit, at least one in-memory computing unit, and a timer. The magnetic cache unit in the at least one magnetic cache unit is used for caching data output by the corresponding in-memory computing unit as to-be-processed data within the corresponding data retention time; the timer is used for respectively setting data retention time for the at least one magnetic cache unit; and the in-memory computing unit in the at least one in-memory computing unit is used for extracting the data to be processed from the corresponding magnetic cache unit for calculation and outputting the computed data to other magnetic cache units. According to the embodiment of the invention, the invention achieves the flexible adjustment of the data retention time of the magnetic cache unit in various in-memory calculation scenes, and achieves the provision of a high-capacity cache for the data needed by in-memory computing under the lower power consumption.

The invention relates to the technical field of microelectronic packaging, and discloses a packaging method of a multi-layer stacked memory chip, which comprises the following steps: constructing a 3D packaging structure layout of a memory chip to be packaged; constructing a physical field of the 3D packaging structure layout, and integrating the physical field and the field action relationship into the 3D packaging structure layout to obtain a coupled 3D packaging structure layout; calculating a hot spot, a high stress area and a high electric field area of the coupled 3D packaging structure layout, and optimizing the coupled 3D packaging structure layout to obtain a target packaging structure layout; performing multi-layer stacking on the to-be-packaged storage chip to obtain a multi-layer stacked storage chip; and packaging the multi-layer stacked memory chip to obtain a packaged multi-layer stacked memory chip, activating packaging repair of the self-repair material by using a preset material repair algorithm to obtain a packaging repair material, and performing multi-layer stacked packaging of the to-be-packaged memory chip based on the packaging repair material. According to the invention, the packaging stability of the multi-layer stacked storage chip can be improved.

An RFID tag interference solving method based on a density peak value clustering algorithm reduces signal interference between tags and improves reliability and identification precision of a system by dynamically adjusting priorities and time windows of RFID tags. The method comprises the following core steps: firstly, acquiring a label response signal through an RFID reader-writer; secondly, preprocessing the data, and removing noise and abnormal values; then, calculating the local density of the label signal, and identifying a density peak value region by using a clustering algorithm; then, reducing signal collision of tags in a high-density region by dynamically adjusting priorities and time windows of the tags in the region, and preferentially processing the tags; and finally, outputting a processed tag identification result. According to the invention, the problem of signal interference in a high-density RFID tag environment is obviously solved, the identification accuracy and the operation stability of the system are improved, and the method is suitable for various high-density tag application scenes.

The invention discloses an external parameter calibration method and system for a mining laser radar and a camera, and belongs to the technical field of computer vision and robotics.The method comprises the steps that an original image and an original point cloud in a to-be-calibrated target scene are obtained; obtaining a preliminary alignment result according to the original point cloud data; optimizing the preliminary alignment result to obtain a laser radar fusion frame point cloud; performing panoramic segmentation on the original image, and constructing a 2D-3D effective target centroid corresponding relation; and based on a laser radar fusion frame point cloud and a 2D-3D effective target mass center corresponding relation, through panoramic segmentation, an effective target is extracted, an effective target panoramic information matching degree target function is constructed, the target function is optimized, and an external parameter optimal solution of the laser radar and a camera is obtained. According to the method, the automatic calibration precision of the external parameters of the mining laser radar and the camera can be effectively improved, and a research basis is provided for subsequent mining laser radar data and image fusion.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention discloses a yellow phosphorus tailing-based mine filling material and application thereof. The yellow phosphorus tailing-based mine filling material comprises aggregate and a cementing material, the cementing material comprises the following components in parts by mass: 5-20 parts of red mud, 20-40 parts of yellow phosphorus slag, 10-30 parts of slag, 5-10 parts of fly ash, 5-10 parts of a compound exciting agent, 1-3 parts of an early strength agent and 2-5 parts of a water-retaining agent; wherein the compound exciting agent comprises the following components in parts by mass: 10-20 parts of sodium metasilicate, 30-40 parts of gypsum powder, 20-30 parts of sodium sulfate, 5-10 parts of carbide slag and 5-10 parts of silica fume; according to the invention, the raw materials are compounded and the specific exciting agent is subjected to depolymerization-polycondensation reaction to obtain a cementing material containing Aft (ettringite), C-S-H gel (hydrated calcium silicate gel) and C-A-S-H gel (hydrated calcium aluminosilicate gel), and finally, the mine filling material with high fluidity, low bleeding rate and high strength is obtained while yellow phosphorus tailing solid waste is treated.

The invention relates to an anti-ant large-core-number fiber ribbon cable comprising a cable core and an outer sheath. The cable core includes loose tubes; and fiber ribbons are sleeved inside the loose tubes. The outer sheath is an outer nylon sheath; and a non-metallic reinforcement layer is arranged between the outer sheath and the cable core. According to the anti-ant large-core-number fiber ribbon cable provided by the invention, with the outer nylon sheath, ants can not bite the sheath, so that the damages on the optical cable by ant biting in a pipe at an area with a serious anti problem are prevented, the normal state of the cable is ensured, and the application region of the cable is extended. The cable based on a simple and reasonable structure has advantages of small cable diameter, high fiber density, large fiber capacity, and low duty ratio and can be laid in a pipe conveniently; and the bending performance is good. During branched connection, 4 to 24 fibers can be melted once, so that the construction time is saved and the manpower cost is lowered, and the construction efficiency is improved. On the basis of the full drying type dielectric structure, branched connection is realized conveniently and usage becomes convenient.

The invention belongs to the field of network attack detection, and particularly relates to an APT attack detection method based on traceability graph behavior information. The method comprises the following four steps: step 1, data preprocessing; step 2, generating a sub-graph; step 3, behavior feature extraction; performing feature extraction on each sub-graph, wherein the feature extraction comprises node feature extraction and edge feature extraction; 4, designing and training a classification model, and performing anomaly detection; and training and testing the classification model, sequentially classifying the type of each edge by using the trained model, and when a certain edge cannot be correctly classified by any existing sub-model, judging that the edge is abnormal, and outputting a behavior structure diagram of the edge. According to the method, behavior attributes and structural information thereof are introduced into the modeling of the traceability graph, and the category of traditionally paying attention to entity interaction relationships is exceeded; by introducing a pooling method and graph representation learning, the expression ability of the model is improved, important information in a behavior structure is more effectively captured, and continuous optimization is performed on the basis of initial structure information.

The invention provides antibacterial ceramic and a preparation method thereof. The antibacterial ceramic comprises a blank body and a glaze layer, the blank body is prepared from the following raw materials: kaolin, diatomite, montmorillonite, soapstone, bamboo charcoal powder, a first antibacterial agent, a fluxing agent, a pore forming agent, an adhesive and a reinforcing agent; the glaze layer comprises the following raw materials: kaolin, diatomite, dolomite, tourmaline, sodium oxide, a second antibacterial agent, a binder, a stabilizer and a dispersant. The method comprises the following steps: firing a molded green body by adopting stepped segmented heating, and carrying out glaze firing by adopting stepped segmented heating after glazing, thereby obtaining the antibacterial ceramic. According to the antibacterial ceramic disclosed by the invention, the antibacterial agent is added into the green body and the glaze layer, so that the influence on the antibacterial property of the green body in the firing process of the green body is avoided, the antibacterial durability is further improved, the antibacterial effect is enhanced, and the antibacterial rate on pathogenic bacteria such as escherichia coli and staphylococcus aureus reaches 99.99%.

The invention belongs to the technical field of optical cables, and discloses an optical fiber ribbon optical cable with special-shaped butterfly-shaped leading-in units, which is provided with a plurality of first optical fiber ribbons, a plurality of special-shaped butterfly-shaped leading-in units, four reinforcing components, a frame component and an outer sheath, the special-shaped butterfly-shaped leading-in units are embedded on frame strips of the frame component, and the special-shaped butterfly-shaped leading-in units and the frame component form a cable core. The cross section of the cable core is rectangular; the reinforcing part is located in the extension cavity, all the first optical fiber ribbons are distributed in the center cavity in a stacked mode, and the cable core is coated with the outer sheath. The optical fiber connector has the main beneficial technical effects that the density of the fiber core is higher, the manufacturing is easier, the number of butterfly-shaped introduction units is larger, the disassembly and assembly are more convenient, the space utilization rate is higher, the optical fiber connector can be suitable for various optical fiber connectors in the prior art, and the compression resistance and the buffering capability are stronger.

The preparation method comprises the following steps: treating sepiolite serving as a raw material with 3-aminopropyltriethoxysilane to prepare aminated sepiolite, ultrasonically blending the aminated sepiolite and a modified filler, then treating with phytic acid to prepare a flame-retardant filler, melting bisphenol A polycarbonate, blending with the flame-retardant filler, and carrying out extrusion molding to obtain the flame-retardant fireproof plastic. When the flame-retardant fireproof plastic is combusted, the flame-retardant filler is subjected to evaporation of hot water molecules to cause structural expansion and form an isolation layer, meanwhile, evaporation of the water molecules can take away heat, released ammonia gas can reduce the content of smoke so as to achieve the flame-retardant effect, and generated inorganic acid and phosphate ester are dehydrated and carbonized, so that the flame-retardant fireproof plastic has a good flame-retardant effect. The carbon layer with large interlayer spacing is formed through cooperation with the isolation layer, an organic silicon structure is contained, Si-C can be formed, then the density of the carbon layer is increased, aluminum oxide and magnesium oxide can be formed after internal aluminum ions and magnesium ions are combusted at high temperature, then the flame retardance of the carbon layer is improved, and the flame-retardant and fireproof effects of the plastic are improved.

The invention belongs to the technical field of medical examination, and particularly relates to preparation and application of a polymerase-labeled secondary antibody. The preparation method comprises the following steps: activating enzyme by divinyl sulfone (DVS), polymerizing with hyperbranched aminated polyethylene glycol to obtain polymer enzyme, activating the polymer enzyme again, and incubating with a second antibody to obtain a polymer-labeled second antibody. According to the method, the main defects of the secondary antibody in the current market are overcome, the enzyme label density on the antibody is improved, and the number of enzyme molecules labeled on the secondary antibody in unit volume is greatly increased; the volume of the polymer enzyme is reduced; the cell penetrability of the enzyme-labeled secondary antibody is improved, and the sensitivity and the stability are higher.

The invention discloses a high-efficiency multiphase flow classification and separation integrated treatment method for argillaceous sandstone uranium ore. The crushed argillaceous sandstone uranium ore mixed material is sequentially subjected to hydraulic polishing and cluster breaking treatment, high-frequency linear vibration grading treatment, first-stage multiphase flow rotational flow grading treatment, deep low-frequency efficient ultrasonic scrubbing treatment, second-stage multiphase flow rotational flow grading treatment, jet flow uniform mixing treatment, micro-current activating treatment, hardening and tempering thickening and efficient squeezing solid-liquid separation treatment. According to the invention, mud and sand deep stripping and material fine grading separation of the crushed argillaceous sandstone uranium ore are realized, meanwhile, the fine-particle argillaceous material is subjected to efficient uniform mixing activation and deep efficient dehydration, and four core materials, namely a coarse sand material, a fine sand material, tailing dry slag and a high-concentration uranium ore leaching solution, are finally formed through continuous work; finally, efficient multi-phase flow fractional separation, concentration and purification treatment of the argillaceous sandstone uranium ore is achieved, residues of uranium elements in tailings are reduced, and the deep extraction rate of uranium ore resources is increased.

The invention discloses a soybean SNP molecular marker combination, a chip and application thereof, and relates to the field of soybean molecular genetic breeding. The SNP molecular marker combination developed by the invention is uniformly distributed on 20 chromosomes of a soybean whole genome, and the accuracy of related research application such as gene positioning can be improved. The SNP molecular marker combination provided by the invention is rich in information amount and has important value in variety identification, correlation analysis and molecular marker-assisted breeding. On the basis, detection products such as SNP typing chips, kits and the like which are high in capture rate, high in density and high in polymorphism and are uniformly distributed in a genome can be developed.

The invention provides a cement particle grading optimization method and system for minimizing porosity, and relates to the technical field of cement material science and engineering, and the method comprises the following steps: obtaining cement particles with different particle size distributions; taking the cement particles as spheres, and generating a sphere set according to the cement particles with different particle size distribution; in the sphere set of each particle size distribution, sampling according to a proportion, and constructing a three-dimensional simulation microstructure model by using the sampled spheres; simulating a sphere accumulation process in a three-dimensional box by using a three-dimensional simulation microstructure model, calculating the porosity in the three-dimensional box in the simulation process, establishing a loss function according to the overlapping volume between spheres and the collision volume between the spheres and the boundary, and obtaining the porosity of cement proportions with different particle size distributions by using a gradient descent method; and adjusting the sampling proportion of each particle size distribution by adopting an optimization algorithm so as to minimize a loss function and realize the grain composition of the cement powder with the minimum porosity and different distribution so as to optimize the strength of the cement.

The invention discloses a solar cell which comprises a silicon substrate, the surface of at least one side of the silicon substrate is provided with a micro-suede of a sand dune-like structure, and a tunneling oxide layer is laminated on the micro-suede; the sand dune-like structure is provided with at least one vertex, and 3-6 curved side edges pass through each vertex; and the side edges are sunken towards the inner part of the sand dune-like structure. The invention also provides a preparation method of the solar cell. According to the solar cell, the surface reflectivity of the solar cell can be effectively reduced, and the characteristics of surface passivation, surface contact and the like are improved, so that the transmission efficiency and the collection efficiency of carriers are improved, and the short-circuit current density and the conversion efficiency of the solar cell are further improved.

The invention discloses a method and equipment for rapidly and continuously preparing carbon nano tubes with adjustable tube diameters, which are used for continuously and rapidly preparing carbon nano tubes with different tube diameters and at least comprise a catalyst precursor atomizing chamber, a plasma device, a carbon nano tube preparation reactor, a collector and a tail gas treatment device. A catalyst precursor solution enters the atomizing chamber through the injection pump to be atomized, atomized mist enters the plasma treatment device and then enters a reaction from a sample inlet in the upper portion of the reactor, after the reaction in the reactor is completed for a short time, the carbon nanotubes are collected from a collecting device on the lower portion of the reactor, and tail gas can be returned to the reactor after being filtered by the filter. The tail gas can be repeatedly used; and the continuous preparation of the carbon nano tubes with different tube diameters can be realized.

The invention provides a preparation method of a blocky powder cosmetic and the blocky powder cosmetic. The preparation method of the blocky powder cosmetic comprises the following steps: material mixing: providing raw materials for preparing the blocky powder cosmetic, and mixing the raw materials to obtain a material body; filling and pre-curing: filling the material body into a mold according to a preset amount through an air pressure feeding device, and extruding and drying the material body to obtain a powder master product which is pre-cured and formed in the mold; freezing: freezing the pre-cured and molded powder mother product at a low temperature; demolding and drying: separating the frozen powder mother product from the mold, and drying to obtain the blocky powder cosmetics; or the frozen powder mother product is dried and separated from the mold, and the blocky powder cosmetics are obtained. According to the preparation method disclosed by the invention, the problems of shrinkage deformation, poor drop resistance of a finished product, cracking, air hole appearance, softness and the like in the preparation process can be improved, and the inactivation of high-temperature sensitive active matters in the preparation process is not caused.

The invention discloses a UWB-based three-dimensional positioning method for tunnel safety monitoring, and the method comprises the steps: arranging an antenna array composed of a plurality of pairs of antennas on an anchor node, only needing one time of DS-TWR communication, enabling a to-be-measured node to be a distance measurement initiator, transmitting a distance measurement request frame according to a set period, enabling the anchor node to be a distance measurement responder, and enabling the distance measurement request frame to be transmitted according to a set period in the antenna array; a certain antenna which firstly receives the request frame serves as a response antenna, the other antennas serve as non-response antennas, and the anchor node calculates the distance between each antenna and the node to be tested according to the difference value of the receiving timestamps of the node to be tested, the response antenna and the non-response antenna; and based on the distance and the PDOA data, obtaining the coordinates of the to-be-measured node subjected to coarse positioning and the coordinates of a plurality of candidate to-be-measured nodes subjected to fine positioning, and screening the node with the minimum distance to the coordinates of the to-be-measured node subjected to coarse positioning from the plurality of candidate to-be-measured node coordinates as a final positioning result of the to-be-measured node. According to the invention, accurate positioning requirements in scenes such as subway tunnels and the like can be effectively met.

The invention relates to the technical field of powder metallurgy, in particular to a tungsten-copper alloy preparation method and a tungsten-copper alloy. The preparation method of the tungsten-copper alloy comprises the following steps: mixing double-scale compound tungsten powder containing nanocrystals and ultra-fine grains or double-scale compound tungsten-tungsten oxide powder containing nanocrystals and ultra-fine grains with copper oxide powder to obtain precursor slurry; drying the precursor slurry to obtain precursor composite powder; the precursor composite powder is subjected to segmented reduction, tungsten-copper composite powder is obtained, and tungsten crystal grains in the tungsten-copper composite powder are distributed in a double-scale mode of nanocrystals and ultra-fine crystals; and the tungsten-copper composite powder is prepared into a blank and sintered, and the tungsten-copper alloy is obtained. The heat conductivity and density of the tungsten-copper alloy can be improved.

The invention provides a tetrapeptide for promoting bone growth, the amino acid sequence of the tetrapeptide is Glu-Pro-Gly-Phe (EPGF), the molecular weight of the tetrapeptide is 448.48 Da, the tetrapeptide can be prepared from egg yolk protein through protease enzymolysis, separation and purification and can also be obtained through chemical solid-phase synthesis, and the tetrapeptide belongs to the technical field of functional bioactive peptides. The tetrapeptide prepared by the invention can promote the growth of osteoblasts in a body and improve the secretion level of insulin-like growth factor-1 (IGF-1), transforming growth factor-beta1 (TGF-beta1) and I-type procollagen amino terminal peptide (PINP) in cells, so that the effect of promoting bone growth is achieved, and a new functional component is provided for a product for improving bone growth.

The invention relates to the technical field of packaging materials, and discloses an antibacterial functional food packaging film and a preparation method thereof.The packaging film is formed by taking low-density polyethylene as a main raw material, adding a compatilizer, a synergistic antibacterial agent, a fiber coating material and the like and carrying out blending, extrusion and film blowing processes. The synergistic antibacterial component is nano-zinc oxide with the surface grafted with biomass antibacterial agent tannic acid, after being immobilized on the surface of the nano-zinc oxide, the tannic acid cannot be easily volatilized and migrated, the broad-spectrum antibacterial performance of the tannic acid is continuously exerted, and the tannic acid and the photocatalytic antibacterial effect of the nano-zinc oxide are mutually cooperated, so that the synergistic antibacterial effect is achieved. Due to the addition of the fiber coating material, the density of the polyethylene film can be improved, and the air tightness and the high-temperature-resistant effect can be improved. In addition, the fiber coating material can exert stress load transfer and absorption effects, so that the prepared polyethylene film has excellent mechanical strength.

The invention discloses a preparation method of a heat-resistant aluminum alloy, the heat-resistant aluminum alloy comprises the following materials: 2.5 wt%-4.5 wt% of Cu, 7.5 wt%-9.5 wt% of Si, 0.5 wt%-1.0 wt% of Zn, less than or equal to 0.2 wt% of Mn, 0.3 wt%-0.5 wt% of Mg, less than or equal to 0.25 wt% of Fe, 0.01 wt%-0.045 wt% of Sr, 0.05 wt%-0.25 wt% of Mo, 0.05 wt%-0.25 wt% of W, 0.03 wt%-0.15 wt% of V, and the balance of Al and impurities, and the total content of the impurities is less than or equal to 0.25 wt%. According to the method, the range of 2.0 Zn + 1.5 Cu + 0.5 Mg and the range of 10 (Mo-W) / Si are designed, meanwhile, the design range of FeV and the smelting preparation process are controlled, W and Si elements react and are combined to generate a WXSiy phase, WXSiy has the excellent performance of high melting point (2220 DEG C), high wear resistance, corrosion resistance, oxidation resistance and the like, and after a formed aluminum alloy component is subjected to T6 heat treatment, the tensile strength is larger than or equal to 450 MPa, the yield strength is larger than or equal to 380 MPa, the percentage elongation after fracture is larger than or equal to 2.0%, and the hardness is larger than or equal to 135 HB. According to 250 DEG C high-temperature mechanical property tests, the tensile strength is larger than or equal to 280 MPa, the yield strength is larger than or equal to 220 MPa, the percentage elongation after fracture is larger than or equal to 4.0%, the hardness is larger than or equal to 85 HB, the comprehensive performance is higher than that of a conventional aluminum alloy forming component, and the aluminum alloy can be widely applied to parts such as heavy commercial automobile flywheel shells, gear chambers and cylinder covers working under the high-temperature working condition, replaces cast iron and achieves light weight and weight reduction.

The invention provides a packaging substrate structure and a preparation method thereof. The preparation method comprises the following steps: providing a core plate layer; forming a multilayer substrate adding layer covering two opposite surfaces of the core plate layer and electrically connected with the core plate layer; providing an interconnection structure layer which comprises a bottom circuit layer, a bottom dielectric layer and a middle interconnection layer; pressing the interconnection structure layer in a preset area of the substrate adding layer in an inverted manner to obtain a required substrate structure layer; solder mask layers are formed on the two opposite faces of the substrate structure layer, contact holes are formed in the preset positions of the solder mask layers, and at least one contact hole exposes the conductive part of the interconnection structure layer. According to the invention, packaging with finer lines, lighter and lighter weight and higher line density can be realized, and signal transmission loss can be substantially reduced at the same time. Besides, the packaging substrate structure has high design flexibility, and the thickness and the circuit density of the interconnection structure layer can be accurately controlled by adjusting the thickness, the number of layers and the circuit design of each dielectric layer and each circuit layer so as to meet specific packaging requirements.

The invention provides an ion energy distribution testing device for immersed plasma injection equipment. The ion energy distribution testing device comprises a Faraday cup, a biasing circuit, a data acquisition unit and an upper computer, the Faraday cup is arranged around the wafer and configured to collect plasma energy around the wafer, and the plasma energy is converted into a current signal at a collector of the Faraday cup; the bias circuit is configured to apply bias voltage to the grid mesh of the Faraday cup under the enabling of the data acquisition unit; and the data acquisition unit is configured to drive the biasing circuit, acquire a current signal of the collector of the Faraday cup and a voltage signal of the grid, and upload the current signal and the voltage signal to an upper computer. According to the invention, through the design of the Faraday cups and the bias circuit, the whole measuring device can realize ion energy distribution measurement under high voltage, and the distribution condition and uniformity of ion energy around the wafer can be tested in cooperation with the arrangement of the plurality of Faraday cups.

The invention discloses a nanometer silicon filled microcrystalline graphite negative electrode material and a preparation method and application thereof. The preparation method of the nano-silicon filled microcrystalline graphite negative electrode material comprises the following steps: by taking microcrystalline graphite as a base material, depositing silane between sheet layers of the microcrystalline graphite by adopting a gradient heating method to obtain a nano-silicon filled microcrystalline graphite composite material; and finally, forming the nano-silicon filled microcrystalline graphite negative electrode material with a porous structure on the surface of the nano-silicon filled microcrystalline graphite composite material through carbon source coating carbonization. According to the nano-silicon-filled microcrystalline graphite negative electrode material with the core-shell structure provided by the invention, an inner core is a silicon-graphite composite material formed by nano-silicon-filled microcrystalline graphite, nano-silicon particles are filled in the surfaces and gaps of crystalline grains of the microcrystalline graphite, volume expansion of the nano-silicon in the charging and discharging process is inhibited by a microcrystalline graphite matrix material, and particularly, the volume expansion of the nano-silicon in the charging and discharging process is inhibited by the microcrystalline graphite matrix material. And due to different structural orientations of the microcrystalline graphite, the stress effect can be counteracted, and the volume expansion of the material is further inhibited.

The invention discloses a double-sterilization-anti-sticking composite cross-linked coating as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials. The coating comprises the following raw materials in parts by weight: 5-30 parts of a cross-linkable release type multifunctional branched polymer and 30-95 parts of a cross-linkable functional polymer. According to the double-sterilization-anti-adhesion composite cross-linked coating, the advantages of contact sterilization, antibacterial factor release and adhesion resistance can be combined together, on one hand, the super-hydrophilic component can effectively prevent initial adhesion of bacteria and protein, and even if a small amount of bacteria fall into the surface of the coating, the contact sterilization component can effectively kill a small amount of adhesion bacteria; the formation of bacteria and biological membranes is avoided; in addition, the introduction of releasable antibacterial molecules can effectively enhance the antibacterial effect, and the purpose of deeply killing pathogens is achieved.