271results about How to "Inhibit expansion" patented technology

The invention provides a risk control early warning method and system based on bank flow analysis, and relates to the technical field of computers, bank flow data of a target user in a bank system is collected, the collected bank flow data is fused with multi-source cross-domain data, and time sequence data of transaction behaviors is generated according to a time sequence; performing data feature extraction on the time sequence data to obtain transaction features; constructing a framework of a risk prediction model, and obtaining the risk prediction model through training and verification; real-time flow data of a target user in a bank system is monitored in real time, a trained risk prediction model is utilized to evaluate transaction behaviors of clients in real time, an anomaly detection result of an anomaly detection model is combined with output of the risk prediction model, a comprehensive risk score is formed to identify potential risks, and an early warning mechanism is triggered. Through deep analysis of bank flow data, real-time risk monitoring and early warning are realized, and potential financial risks can be effectively identified.

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention relates to a low-altitude economic development form analysis method and system based on a high-density city, and the method comprises the steps: obtaining task address information and task type information of each aircraft, and carrying out the path planning in a preset airspace range according to the task address information and the task type information, obtaining flight path information of each aircraft; acquiring real-time traffic flow and airspace condition information in a preset airspace range, and performing real-time optimization adjustment on the flight path information according to the real-time traffic flow and the airspace condition information; monitoring the activities of the aircrafts in the airspace in real time, obtaining the flight information of each aircraft, and judging whether the corresponding aircraft has a flight violation condition or not according to the flight information; the flight task state is tracked and fed back in real time, the aircraft state and the equipment operation condition in the airspace are monitored, equipment alarm is triggered under the abnormal condition, and preset emergency treatment measures are taken. The method has the effect of improving the low-altitude aircraft management and control efficiency.

The invention discloses a method for improving the high-cycle fatigue performance of a Ti6Al4V titanium alloy, and belongs to the technical field of metal material processing, and the method comprises the following steps: S1, determining shot peening strengthening parameters based on material performance parameters and related standards; according to the method, high-amplitude residual compressive stress is introduced through shot peening strengthening, the stress state of the surface and the depth direction of the material is changed, accordingly, crack extension can be restrained, the fatigue life is prolonged, in addition, a plastic deformation layer is induced to be generated under the surface depth in the shot peening process, the microstructure of the material is improved, and the anti-fatigue performance of the material is improved; through femtosecond laser shock, surface defects can be effectively removed, the surface compactness can be improved, microcracks can be reduced, and a refined grain structure can be generated, so that the strength and toughness of the material are further enhanced, the high-cycle fatigue performance of the material is further improved, the two are combined, the residual stress state is optimized, and the surface integrity is improved. The fatigue performance of the Ti6Al4V titanium alloy is remarkably improved.

The invention relates to the field of arid region oasis ecological protection, and discloses an arid region oasis protective barrier construction pattern and plant species configuration method, according to the characteristics of the arid region oasis structure, a protective barrier is laid, and according to the habits, uses and morphological characteristics of plants and the functional difference of different plants, the arid region oasis protective barrier construction pattern is constructed. Proper arbor, shrub and herbaceous plant configuration is carried out, and the method comprises the steps that a photovoltaic, mechanical sand stabilization and shrub and grass sand blocking belt is constructed in the edge zone of the desert, a windproof backbone forest is arranged at the junction of the desert and the oasis, forest network construction is carried out in a farmland area in the oasis, and greening and beautifying are carried out on the periphery and the interior of a residential area. By constructing a multi-layer and multifunctional oasis protection barrier system, desertification control and oasis protection system construction are achieved, regional economic development and biodiversity recovery are promoted, and the win-win situation of ecological benefits and economic benefits is achieved.

The invention belongs to the technical field of metal part surface modification, and relates to a composite strengthening method for a carburized surface of a high-bearing gear of an aero-engine. According to the method, high-hardness and high-density ceramic shots are adopted as media for high-energy mechanical shot peening strengthening, the advantage that the subsurface strain hardening effect of the contact strengthening technology is good and the barb-shaped distribution characteristic of mechanical shot peening residual compressive stress are utilized, extremely high residual compressive stress is introduced to the subsurface position, and the contact fatigue performance of the tooth surface of the gear is improved. High-frequency laser shot peening strengthening is used for secondary treatment, so that the surface layer of the material is subjected to plastic deformation, high-amplitude residual compressive stress is introduced into the surface layer of the material within the depth range of more than 500 microns by utilizing the advantage of large influence depth of laser-induced shock waves, and the residual compressive stress can inhibit fatigue crack initiation, has a certain depth and inhibits fatigue crack propagation; and the bending fatigue resistance of the root of the gear can be effectively improved. And an abrasive flow process is adopted, so that the roughness is reduced to be more than 0.4 mu m.

The invention provides a high-heat-conductivity and high-corrosion-resistance magnesium alloy suitable for a mobile phone middle plate and a preparation method of the high-heat-conductivity and high-corrosion-resistance magnesium alloy, and belongs to the technical field of magnesium alloy materials. The magnesium alloy is composed of, by mass, 3.0%-5.0% of Al, 1.0%-3.0% of Ce, 0.5%-2.0% of Nd, 0.1%-1.0% of Sn, impurity elements Fe smaller than or equal to 0.06%, Cu smaller than or equal to 0.004%, Ni smaller than or equal to 0.002% and the balance magnesium. After the magnesium alloy is subjected to a 7-day neutral salt spray experiment, the measured weightlessness corrosion speed is 0.236 mm / y, the yield strength reaches 150-160 MPa, the tensile strength is 250-280 MPa, the ductility is 8-12%, and the heat conductivity is 110-120 W / (m.K).

The invention relates to the technical field of aluminum-based composite materials, in particular to an intelligent temperature control self-repairing aluminum-based composite material and a preparation method of the intelligent temperature control self-repairing aluminum-based composite material. 5-15 parts of shape memory alloy microwires; 4.3 to 11.8 parts of epoxy resin prepreg containing microcapsules; wherein the epoxy resin prepreg containing microcapsules is composed of the following components: 3-8 parts of epoxy resin; 0.3 to 0.8 part of a curing agent; according to the invention, the advantages of a metal material, a composite material and an intelligent material are ingeniously combined. The aluminum alloy matrix provides excellent specific strength and specific stiffness, the shape memory alloy microwires endow the material with intelligent response capability, and the microcapsule system realizes a chemical repair function.

The invention relates to a surface strengthening method for improving the rotary bending fatigue strength of shaft steel, which comprises the following steps: step 1, pretreatment: carrying out finish machining on the shaft steel, polishing the shaft steel with abrasive paper, then cleaning a sample with acetone and absolute ethyl alcohol solvents to remove oil stains and impurities on the surface, cleaning the sample with an ultrasonic cleaning machine, and air-drying the cleaned sample; and 2, electric pulse auxiliary ultrasonic surface rolling treatment is conducted, the sample is clamped on a lathe, currents are connected to the two ends of the sample through a pulse power source, technological parameters are set, lubricating oil is adopted for lubrication in the rolling process, the surface of the sample is machined for multiple times, and the surface-strengthened shaft steel sample is obtained. According to the method, a gradient plastic deformation layer, a hardened layer and a residual stress layer are introduced by adopting a mode of treating the surface of the shaft steel through electric pulse-assisted ultrasonic surface rolling, so that the expansion of cracks can be obviously inhibited, and the rotary bending fatigue strength of a sample can be effectively improved while the surface hardness and the residual stress are improved.

The invention relates to the field of carbon-ceramic composite materials, in particular to a chopped carbon fiber reinforced carbon-ceramic composite material and a preparation method thereof.The chopped carbon fiber reinforced carbon-ceramic composite material is prepared from, by weight, 10-60 parts of chopped carbon fibers, 10-60 parts of silicon carbide powder, 10-60 parts of carbon powder, 10-60 parts of phenolic resin and 0.1-10 parts of graphene; the prepared carbon-ceramic composite material has good mechanical properties and excellent wear resistance, the densification process of the material is rapid and does not need to be repeatedly carried out, the time is saved, and the production efficiency is improved.

The invention discloses a lead-free energy storage ceramic laminated material, and belongs to the technical field of dielectric energy storage. The lead-free energy storage ceramic laminated material is formed by sequentially laminating lead-free energy storage ceramic with a texture structure and lead-free energy storage ceramic with a non-texture structure, and preferably, the material comprises at least three layers; when the lead-free energy storage ceramic with the texture structure is positioned on the middle layer, the lead-free energy storage ceramic with the non-texture structure is positioned on the two sides of the middle layer; when the lead-free energy storage ceramic with the non-texture structure is located on the middle layer, the lead-free energy storage ceramic with the texture structure is located on the two sides of the middle layer. Based on the structural design of at least three layers, the non-textured ceramic is selected as the high-voltage-resistant layer, the textured ceramic is selected as the high-polarization layer, the lead-free ceramic laminated material with excellent energy storage performance is obtained, and the lead-free ceramic laminated material has wide application prospects in the fields of power electronics and pulse power.

The invention relates to the technical field of building materials, and discloses a high-pervious concrete admixture and pervious concrete. The pervious concrete admixture is prepared from the following raw materials in parts by weight: 25 to 35 parts of acrylic resin, 5 to 10 parts of modified polypropylene fiber, 15 to 25 parts of water reducing agent, 7 to 10 parts of kaolin and 15 to 25 parts of reinforcing filler, acrylic resin is used as an adhesive structure, and a functional additive is added to improve the compression resistance, the impermeability and the water permeability of the pervious concrete; wherein due to the introduction of the reinforcing filler, the compressive strength and the impermeability of the matrix are improved, and the water permeability, the pressure resistance and the impermeability of the matrix can be improved through the synergistic effect of the modified polypropylene fibers and the reinforcing filler, so that the service life of the pervious concrete is prolonged.

The invention discloses CF120 ultrahigh-strength concrete and a preparation method thereof. The concrete comprises the following raw materials in parts by weight: 500-600 parts of cement; 750 to 860 parts of sand; 1200 to 1350 parts of broken stone; 90 to 100 parts of fly ash; 75 to 83 parts of straw ash; 37 to 50 parts of silica fume; 145 to 160 parts of water; 15 to 20 parts of a water reducing agent; 15 to 20 parts of an exciting agent; 3-5 parts of a defoaming agent; 12-16 parts of a shrinkage reducing agent; 23 to 28 parts of CaCO3 crystal whisker; 20 to 30 parts of polyvinyl formal acetal; 20 to 30 parts of titanium dioxide loaded fiber; the titanium dioxide loaded fibers are prepared by modifying fibers with titanium dioxide; the fibers comprise at least one of steel fibers or polypropylene fibers. The CF120 ultrahigh-strength concrete provided by the invention has relatively high compressive strength and breaking strength, and the situation that the concrete generates cracks is also reduced.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention relates to the technical field of coatings, and discloses a graphene modified epoxy resin composite anticorrosive coating which is prepared by the following steps: reacting graphene oxide with epoxy chloropropane to obtain epoxidized graphene, reacting the epoxidized graphene with hydroxyl-terminated styrene-butadiene rubber under the action of a catalyst to obtain hydroxyl-terminated styrene-butadiene rubber modified graphene, and reacting the hydroxyl-terminated styrene-butadiene rubber modified graphene with toluene-2, 4-diisocyanate to obtain the graphene modified epoxy resin composite anticorrosive coating. The graphene modified epoxy resin composite anticorrosive paint is finally prepared by reacting isocyanate esterified styrene-butadiene rubber with graphene to obtain isocyanate esterified styrene-butadiene rubber modified graphene, further reacting the isocyanate esterified styrene-butadiene rubber modified graphene with N, N-carbonyldiimidazole to obtain imidazolyl styrene-butadiene rubber modified graphene, and blending the imidazolyl styrene-butadiene rubber modified graphene with epoxy resin, and graphene can absorb and disperse stress and can also form a physical barrier layer. And imidazole can provide free electrons and can form a stable monomolecular adsorption film on the surface of a matrix to prevent the corrosion process and further play a role in corrosion inhibition, so that the corrosion resistance of the epoxy resin coating is effectively improved.

The invention discloses an electromagnetic wire self-adhesion performance data acquisition and intelligent analysis method, and relates to the technical field of data analysis. Multi-source data such as turn-to-turn gap, paint layer residual thickness, tension fluctuation and conduction state are synchronously acquired in the winding process; and analysis mechanisms such as a gap reduction rate, paint layer thinning distribution, a synchronous evolution track and a gap strength response curve are introduced, so that continuous modeling and quantitative characterization of the autohension performance evolution process are realized. Compared with the prior art which only depends on a single gap threshold value or a post mechanical test to judge the bonding performance, the method can be started from a complete physical chain from gap change to paint layer extrusion to metal contact to bonding failure, and the change trend of the bonding performance under different gap levels can be accurately revealed; and tension output is corrected in real time through a self-adaptive algorithm, closed-loop optimization of the bonding quality is achieved, and the product percent of pass and the production efficiency are improved.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The invention discloses a lightweight high-strength power cable based on a composite material and application thereof, belongs to the technical field of cable preparation, and aims to solve the technical problem that the lightweight and anti-electromagnetic interference performance of a lightweight cable in the prior art needs to be further improved. The cable comprises a conductor layer, a light shielding layer, a wrapping layer and a composite sheath layer which are sequentially arranged from inside to outside, modified carbon spheres are introduced into a titanium dioxide aerogel structure for filling and loading copper particles, obtained composite aerogel serves as a filling material of the light shielding layer, the modified carbon spheres serve as a cross-linking agent and a filling material of light polyurethane, and the light shielding layer and the composite sheath layer are formed. The composite aerogel and the lightweight polyurethane significantly reduce the density of the cable and significantly improve the lightweight performance of the cable, and through the synergistic cooperation of the copper particles, the titanium dioxide aerogel structure and the hollow carbon spheres, the anti-electromagnetic interference performance of the material is significantly improved.

The invention discloses a method for preparing a high-performance closed-cell perlite material by a chemical method, the prepared high-performance closed-cell perlite material is mainly used in the field of buildings, and the method comprises the following steps: S1, expanding; s2, film covering; s3, dispersing; s4, grading; according to the invention, a layer of silica sol film is formed on the surface of the closed-cell perlite, the film layer not only significantly reduces the volume shrinkage of the closed-cell perlite in the subsequent slurry stirring process, but also effectively hinders the expansion of cracks in the perlite and greatly reduces the cracking risk, and meanwhile, the heat conductivity coefficient of the material is also reduced by film coating treatment, so that the thermal conductivity of the material is improved. The thermal insulation performance is obviously improved; according to the drying furnace, through cooperative use of the drying mechanism and the adjusting mechanism, the air outlet pipe can be driven to swing up and down in a reciprocating mode, so that the air blowing angle of the air outlet pipe is adjusted according to use requirements, hot air can be blown to different areas in the furnace body, the air blowing range is widened, and the perlite drying effect is improved.

The invention belongs to the field of selective laser melting rapid prototyping, and discloses a TiCN nanoparticle-containing magnesium alloy for selective laser melting and application thereof, and the TiCN nanoparticle-containing magnesium alloy powder for selective laser melting comprises the following components by mass: 8.5-9.5% of Al element, 0.5-0.9% of Zn element, 0.2-0.4% of Mn element, 1.5-2.5% of TiCN nanoparticles, less than or equal to 0.1% of impurity, and the balance of Mg element. The TiCN nanoparticles are introduced into the magnesium alloy, the selective laser melting process is matched, the mechanical property of the correspondingly obtained SLM magnesium alloy forming part is good, the ductility of the forming part is further improved through the refined and uniform magnesium alloy grain structure and dispersively distributed nano TiCN, and the tensile strength, the yield strength and the creep fracture life of the forming part are all improved.

The invention discloses a method for preparing functional artificial aggregate from lake and reservoir deposits, and belongs to the technical field of preparation of artificial aggregate. The functional artificial aggregate with excellent mechanical properties is prepared by taking the reservoir deposits, the mineral powder and the fly ash as main raw materials, adjusting the ratio of the reservoir deposits to the mineral powder to the fly ash, combining layered sodium disilicate, nano CaO and silicon powder as an alkali activator and an additive, and doping fibers and phase change microcapsules at the same time. The problems that in the prior art, reservoir deposits are difficult to recycle and low in utilization rate, and a traditional alkali excitation system cannot control the early strength are solved.

The invention belongs to the technical field of building materials, and particularly relates to a low-carbon cementing material for preparing a high-speed roadbed and a preparation method of the low-carbon cementing material. The main component mineral powder of the cementing material is subjected to amination treatment, the fly ash is subjected to sulfhydrylation treatment, and the modified gypsum and the citric acid carbon quantum dot doped red mud are introduced, so that the high-speed roadbed low-carbon cementing material is prepared, it is guaranteed that the cementing material has proper final setting time, and the compressive strength and the breaking strength are effectively improved.

The invention discloses a superfine grouting material for repairing concrete slits in a high and cold environment as well as a preparation method and application of the superfine grouting material. The superfine grouting material for repairing the concrete slits in the high and cold environment is prepared from the following raw materials in parts by weight: 4000 to 8000 parts of sulphoaluminate cement clinker, 500 to 1000 parts of dihydrate gypsum, 500 to 1000 parts of ordinary Portland cement, 200 to 1000 parts of silica fume, 200 to 1000 parts of limestone powder, 1000 to 2000 parts of slag, 1 to 5 parts of lithium carbonate, 20 to 30 parts of boric acid, 20 to 30 parts of polycarboxylate superplasticizer, 1 to 10 parts of thickener, 10 to 80 parts of calcium formate and 3500 to 4000 parts of water. The grouting material does not contain aggregate and can enter cracks with the size smaller than 0.05 mm, and extension of extremely narrow cracks is prevented; in addition, the grouting material is directly mixed with water with the temperature lower than 5 DEG C in a cold environment, the operable time is long, and preset compression resistance and breaking strength can be achieved within one day.

The invention relates to a fiber-reinforced solid oxide battery sealing material and a preparation method thereof, the sealing material is a glass-mullite fiber composite material, the glass-mullite fiber composite material comprises 3-20 wt.% of mullite fibers, the mullite fibers are Al-Si polycrystalline mullite fibers, the principal crystalline phase is a single mullite phase, the diameter of the fibers is 1-20 [mu] m, the monofilament length is 0.2-150 mm, and the diameter of the fibers is 1-20 [mu] m. And the length-diameter ratio is 200 to 5000. The preparation method of the solid oxide battery sealing material comprises the following step: mixing glass and mullite fibers to obtain the sealing material. Compared with a conventional glass sealing composite material, the solid oxide battery sealing material provided by the invention has better mechanical properties, can stably work in a high-temperature water vapor environment, and can isolate external oxygen and water vapor for a connecting interface of a connector.

The utility model belongs to bridge building technical field discloses a kind of bridge high bearing capacity node optimization structure, including H-shaped steel, H-shaped steel is connected with link steel by reinforcing bolt and reinforcing nut, first hinged seat is equipped on link steel, transverse I-beam is installed on link steel, second hinged seat is equipped on transverse I-beam;Link member is connected between first hinged seat and second hinged seat, link member includes core energy consumption section, transition section and elastic connecting section, first hinged seat, second hinged seat and link member form triangular force transmission mechanism, core energy consumption section is equal cross section steel plate, two end elastic connecting sections are connected with first hinged seat and second hinged seat, top angle angle of triangular force transmission mechanism is 45 °-60 °, and the axis of first hinged seat and H-shaped steel web center line present 10 °-15 ° angle of inclusion.The utility model not only can realize the multidirectional transmission of node area force, but also can avoid the stiffness mutation problem caused by traditional welding, and can inhibit the expansion of microcrack.

The present application relates to the technical field of bamboo fiber composite material, in particular to a purification preparation method of bamboo fiber reinforced natural polymer composite material. The bamboo raw material is crushed and treated by steam explosion to obtain primary bamboo fiber; the primary bamboo fiber is sequentially subjected to organic solvent dewaxing treatment and oxidation system selective delignification treatment to obtain purified bamboo fiber; the purified bamboo fiber is treated in a tannin acid solution to form a polyphenol interface layer on the surface thereof; and a solution containing polyvalent metal ions is added to the treated bamboo fiber to form a coordination cross-linking interface layer on the surface of the bamboo fiber. The present application constructs a stable interface layer between the fiber and the natural polymer matrix. The interface layer can effectively transfer stress, significantly improve the tensile strength, bending strength and shear strength of the composite material, and solve the problem of weak interface and easy delamination of traditional natural composite materials.

The invention discloses a cold rolling process of an aluminum-based silicon carbide coil material. The cold rolling process comprises the following steps: carrying out surface treatment and coiling on a hot-rolled coil material; after the protective film is removed online, cold rolling-annealing I circulation is conducted, the single-pass rolling reduction of cold rolling is 5%-10%, the unit tension is 10%-30% of the yield strength of the material, the speed is smaller than or equal to 15 m / min, heat preservation is conducted for 1-2 h at the temperature of 430-480 DEG C in annealing I, and the heating and cooling rate is smaller than or equal to 10 DEG C / min; then edge cutting is carried out to remove edge cracks; the heating and cooling rate of the annealing II is smaller than or equal to 8 DEG C / min, and the heat preservation time is shorter than that of the annealing I; performing surface treatment after annealing II; and finally, finished product cold rolling is conducted, the single-pass rolling reduction is 5%-8%, and the speed is 5-10 m / min. By means of optimized multi-pass small rolling reduction rolling, staged temperature control annealing and tension control, the technical problem that the aluminum-based silicon carbide composite material is prone to cracking and strip breakage in the continuous cold rolling process is solved.

The utility model provides a high-melting-point graphite pipe for elemental analysis, which belongs to the technical field of spectral analysis and comprises a circular hollow graphite pipe main body and transverse support parts symmetrically arranged on two sides of the graphite pipe main body, an inner pyrolytic carbon layer is deposited on the inner wall of the graphite pipe, a porous structure is arranged in the inner pyrolytic carbon layer, and an outer compact pyrolytic carbon layer is further deposited on the surface of the inner pyrolytic carbon layer. Through the inner pyrolytic carbon layer and the outer compact pyrolytic carbon layer, in the high-temperature working process, the inner wall pyrolytic carbon layer can be selectively consumed to form a compact glassy carbon film, a self-adaptive protection mechanism enables the graphite tube to still keep stable analysis performance under extreme conditions, reaction or permeation of a detected element and graphite at high temperature is reduced, and the analysis accuracy of the graphite tube is improved. The phenomenon of cross contamination is reduced, the memory effect of the graphite pipe is reduced by 70%, but the memory effect of a traditional pyrolytic graphite pipe can only be reduced by 30-40%, and the graphite pipe is particularly suitable for analysis of high-melting-point elements.

The present application relates to a method and system for analyzing the development forms of low-altitude economy based on high-density cities, the method comprising obtaining the mission address information and mission type information of each aircraft, and performing path planning within a preset airspace according to the mission address information and mission type information, and obtaining the flight path information of each aircraft; obtaining the real-time traffic flow and airspace status information within the preset airspace, and optimizing and adjusting the flight path information in real time according to the real-time traffic flow and airspace status information; real-time monitoring of aircraft activities within the airspace, obtaining the flight information of each aircraft, and judging whether the corresponding aircraft has any flight violations according to the flight information; real-time tracking and feedback of the flight mission status, and monitoring the aircraft status and equipment operation status within the airspace, triggering equipment alarms in the event of an abnormality and taking preset emergency treatment measures. The present application has the effect of improving the efficiency of low-altitude aircraft control.

The invention provides a display panel and a display device, and belongs to the technical field of display, the display panel comprises an opening area, a display area at least partially surrounding the opening area, and a transition area located between the opening area and the display area; the display panel comprises a substrate in an opening area; the first packaging layer is arranged on one side of the substrate; the second packaging layer is arranged on the side, away from the substrate, of the first packaging layer; the first partition areas are annularly distributed in the opening area; the at least one hole is formed in the hole area; wherein the first packaging layer is disconnected in the first partition area, the second packaging layer is continuous in the first partition area, and the orthographic projection of at least one hole on the substrate is located in an area defined by the boundary line, closest to the transition area, of the first partition area. According to the display panel and the display device, the situation that water vapor or foreign matter enters the display panel from the edge of the opening can be reduced, the service life of the display panel is prolonged, and the reliability of the display panel is improved.