1019 results about "Rough surface" patented technology

The invention relates to the field of abrasion morphology determination and abrasion loss calculation, and discloses an abrasion morphology and contact stress analysis and prediction method and system based on a rough contact surface, a medium and equipment, and the method comprises the steps: constructing a dynamic contact model, and obtaining an accurate movement rule and a stress analysis result of a moving mechanical component; constructing a three-dimensional rough surface digital twinborn model conforming to an actual contact surface; establishing a contact stress field multi-physical field analysis model to obtain elastic deformation and a friction heat effect; based on the contact stress distribution and the local wear rate which are obtained in real time, carrying out dynamic reconstruction on the wear morphology, and establishing a nonlinear iteration relation between the wear loss and the contact stress distribution; determining an accurate boundary condition based on an accurate movement rule and a stress analysis result of the moving mechanical component, and constructing a failure criterion based on contact stress gradient mutation and surface roughness evolution; key parameters are calibrated through experiments, and a mapping relation database of wear rate-stress state-morphological characteristics is established so as to carry out friction wear analysis.

The invention discloses a metal fatigue life prediction method under laser shock peening, and relates to the technical field of metal material fatigue life prediction. The invention discloses a metal fatigue life prediction method under laser shock peening. The metal fatigue life prediction method comprises the following steps of roughness model construction, roughness evolution simulation, roughness value calculation, material attribute endowing and fatigue life prediction. According to the method, the real surface is subjected to laser shock peening, the roughness evolution condition of the metal surface subjected to laser shock peening is accurately predicted, and then the fatigue life is predicted by adopting a method of combining a Basic-Manson-Coffin formula and continuous damage mechanics. The method fully considers the local complex stress-strain state under the evolution of the roughness surface microstructure after laser shock peening, truly simulates the fatigue progressive damage process of the sample after comprehensive consideration of laser shock peening, and can effectively improve the prediction precision of the fatigue life of the metal after laser shock peening.

The invention discloses a semiconductor structure processing method and a semiconductor structure, and the processing method comprises the steps: providing a substrate with a high-aspect-ratio etching structure, and enabling the side wall of the high-aspect-ratio etching structure to have rough surface morphology; performing a first treatment on the surface of the sidewall using first neutral particles to generate an oxide layer on the surface of the sidewall; performing second treatment on the surface of the side wall by using second neutral particles so as to remove the oxide layer and reduce the roughness of the surface of the side wall; and performing third treatment on the surface of the side wall by using third neutral particles so as to repair lattice damage existing on the surface of the side wall. According to the method, different neutral particles are excited by using metastable state particles, and the rough surface of the side wall is correspondingly treated, so that the treatment degree can be finely controlled, lower damage is realized, the uniformity is more controllable, the surface of the treated side wall is smoother, and the performance of a device is improved.

Disclosed is a negative pressure suction-based fixing device comprising a housing, a suction and holding member, a negative pressure creating assembly and a sealing member. The housing has an accommodating cavity thereinside. The suction and holding member has an abutting and holding surface recessed to form a suction cavity communicated with the accommodating cavity. The abutting and holding surface has a mounting structure connected to the sealing member, so that the sealing member is arranged on the abutting and holding surface for abutting against the suction surface. The sealing member can be elastically deformed to fit with the suction surface so as form an enclosed space together with the cooperation of the suction cavity and the suction surface. In this way, it is difficult for the negative pressure suction-based fixing device to fall off from a rough surface.

The invention discloses a low-strength polyester fully-drawn yarn and a preparation method and application thereof.The preparation method comprises the steps that a polyester melt is sprayed out of a yarn strip through a spinneret orifice with a flat cross section, the yarn strip is cooled and oiled, then the yarn strip makes frictional contact with a brittle damage part with a rough surface layer, the yarn strip enters a pre-interlacer to be treated, drawn and shaped, and the low-strength polyester fully-drawn yarn is obtained. The main network is interlaced; wherein the surface roughness Ra of the rough surface layer is 0.5-1.5, filaments located between the brittle damage part and the pre-interlacing device enter the pre-interlacing device at an included angle alpha, the acute included angle between the filaments entering the pre-interlacing device and the perpendicular normal of the end face, where the filaments enter, of the pre-interlacing device is the included angle alpha, and the included angle alpha is 10-30 degrees; according to the method, the ideal brittle damage effect of the polyester filaments can be achieved without being subjected to multiple treatments such as a high-temperature environment, strong alkali and alcohol, the energy consumption and the cost are low, and the prepared cloth has low tearing strength and is suitable for preparing medical adhesive tape, wiring harness adhesive tape or trademark cloth.

The invention belongs to the technical field of image processing, and particularly relates to an ore grinding and screening monitoring method and system based on image particle size analysis, and the method comprises the steps: collecting an ore image, generating a distance transformation diagram, and constructing an extreme value topology network; calculating the relative topology significance of adjacent maximum value points, and constructing a peak-valley independence index in combination with the spatial distance; performing iterative fusion on the maximum value points based on the peak-valley independence index to obtain a final mark set; and performing watershed segmentation by taking the final mark set as a seed, calculating ore particle size cumulative distribution, extracting a characteristic particle size index, and adjusting grinding process parameters according to the characteristic particle size index. Through the combined constraint of the relative topology saliency and the peak valley independence index, the method can adapt to multi-scale features and effectively eliminate the interference of the surface texture of the ore, solves the problem of over-segmentation caused by rough surface in the traditional method, and realizes the real-time optimization, energy conservation and consumption reduction in the grinding process.

The invention discloses a phased array ultrasonic detection rough surface coupling agent dynamic supplementing and sealing system which comprises a flexible sealing structure, a coupling agent supply unit, a pressure feedback control unit and a self-adaptive attaching structure. A flexible sealing structure is adopted to form a continuous liquid coupling film between the probe and the detected joint, and the coupling agent supply unit actively supplies liquid to keep the thickness of the liquid coupling film stable in a range of 0.5-1.5 mm so as to reduce ultrasonic energy loss and a blind area; in addition, the coupling agent liquid can be controlled not to leak or the leakage can be controlled within an acceptable range through the sealing mechanism, and the coupling agent supply unit is matched to continuously and stably supply the liquid, so that the coupling layer is ensured to be uninterrupted in the scanning process.

The invention relates to the technical field of ceramic phase coatings, in particular to a high ceramic phase gradient coating preparation process which comprises the following steps: (1) metal matrix pretreatment; (2) constructing a coating material; (3) plasma spraying; (4) thermal shock strengthening treatment; according to the preparation technology of the high-ceramic-phase gradient coating, through reasonable matching of all the components and optimization of the technology, the performance in multiple aspects is obviously improved. In the metal matrix pretreatment stage, a micro-nano rough surface is constructed by adopting a laser texturing technology, so that the roughness of the surface of the matrix is increased, more mechanical occlusion points are provided for the coating, pollutants and an oxide layer on the surface are removed, the activity of the surface of the matrix is improved, and the bonding strength of the coating and the matrix is remarkably enhanced. Mainly, mechanical interlocking is formed between the rough surface structure and the coating, and chemical bonding between the coating and a base body is promoted through the clean and high-activity surface, so that the bonding strength is greatly improved.

The utility model provides an end cover assembly, an energy storage device and electric equipment. The end cover assembly comprises a cover body, a pressing ring and a pole, the cover body is provided with an assembling hole, the assembling hole penetrates through the cover body in the thickness direction of the cover body, the pressing ring is located on one side of the cover body in the thickness direction, the pressing ring is provided with a matching hole, the matching hole penetrates through the pressing ring in the thickness direction of the pressing ring and is communicated with the assembling hole, and the pole penetrates through the assembling hole and the matching hole. The pressing ring is welded and fixed; wherein the pole comprises a pole connecting surface deviating from the cover body, the pressing ring comprises a pressing ring connecting surface deviating from the cover body, the pressing ring connecting surface is arranged around the matching hole and the pole connecting surface, and at least one of the pole connecting surface and the pressing ring connecting surface is a rough surface.

The invention relates to the technical field of display, and particularly provides a display panel and a preparation method thereof and a display device.The display panel comprises a substrate and an isolation structure, the isolation structure is located on one side of the substrate, and a plurality of isolation openings are defined by the isolation structure; a first film layer is arranged on one side, facing the isolation opening, of the isolation structure, and a rough surface is arranged on the surface of one side, facing the isolation opening, of the first film layer; wherein the material of the first film layer is different from that of the isolation structure. The application is used for improving the use performance of the display panel to a certain extent.

The invention relates to the technical field of copper-aluminum composite welding, in particular to a thin aluminum bar lap welding method. The method comprises the following steps: firstly, carrying out microstructure regulation and control on a welding surface by adopting a mechanical directional polishing technology, effectively removing a surface oxide layer and forming a uniform rough surface; secondly, accurate management of heat input is achieved through a gradient temperature control strategy, and heat damage to the thin-wall material is avoided; and meanwhile, mutual diffusion of copper atoms and aluminum atoms is promoted by combining a metallurgical transition layer technology, and stable metallurgical bonding is formed. In terms of structural design, a unique positioning system ensures the assembly precision, and the process stability is remarkably improved in cooperation with an optimized welding process. According to the method, the welding quality of the thin aluminum row is improved in a breakthrough mode, meanwhile, the good industrial production adaptability is achieved, and a reliable solution is provided for the connection technology in the fields of power batteries, energy storage equipment and the like.

The invention belongs to the technical field of gravity dam construction, and provides an assembled concrete cooling pipe structure and method for gravity dam construction. The cooling pipe is composed of a plurality of pipe body units connected in series, and lining pieces are arranged in metal pipes of the pipe body units. The lining piece and the elastic steel sheets form a criss-cross cage type structure through the strip-shaped plates, the strip-shaped plates are provided with pitted surfaces and notches, the steel sheets can stretch out and draw back to achieve variable-diameter adjustment, and water flow can be forced to generate turbulent flow to damage the laminar flow bottom layer. The method comprises the steps of raw material pretreatment, notch and pitted surface machining, lining piece assembling, metal pipe assembling and fixing and pipe body unit series connection. The structure is stable, manufacturing is convenient, boundary layer thermal resistance can be reduced, heat transfer efficiency is improved, concrete temperature cracks are reduced, and the gravity dam construction requirement is met.

The invention relates to the technical field of special cables, in particular to an anti-electromagnetic interference double-shielding signal cable for precise instruments, which comprises conductor units, insulating layers, wire pair shielding layers, a filling buffer layer, a self-adaptive conductive layer, an inner main shielding layer, a bonding layer, an outer main shielding layer and a sheath layer, through combination of the graphene composite conductor and the low-dielectric insulating layer, 10GHz signal attenuation is smaller than or equal to 0.5 dB / m, signal transmission errors are greatly reduced, through cooperation of the 3D braided shielding layer and the filling buffer structure, the bending fatigue life of the signal cable is larger than or equal to 200,000 times, through self-repairing design of the liquid metal microcapsules, the shielding effectiveness of a damaged part is recovered, and the service life of the signal cable is prolonged. Protrusions are arranged on the inner layer, form mechanical occlusion with a microscopic rough surface of a copper foil composite layer on the inner main shielding layer, and are matched with a plurality of pits in the surface of the outer layer to form point-surface composite contact with a 3D woven silver-plated copper wire layer of the outer main shielding layer, so that the peel strength of the inner main shielding layer and the outer main shielding layer is greatly improved.

The invention provides a resin material and a preparation method and application thereof, and relates to the technical field of batteries, the resin material comprises spherical resin particles, the surface contains rough and smooth areas, and the ratio of the sum of the areas of the smooth areas to the surface area of the smooth particles with the same diameter is defined as a smooth coefficient. The average value of the smoothness coefficients of the spherical resin particles in the resin material, namely the smoothness coefficient S1, is 0.0-80.0%. The resin material can be prepared by adding resin, a roughening agent and an optional curing agent into water containing an emulsifier and carrying out solid-liquid separation after the reaction is finished. A spherical carbon material with a rough surface can be obtained by carbonizing the resin material, and a spherical silicon-carbon composite material with a rough surface can be prepared by taking the carbon material as a framework and is used for a negative electrode and a battery; the problem that in the prior art, the circulation stability of spherical silicon-carbon negative electrode particles is poor due to the fact that active substances are prone to being separated from electric contact in the charging and discharging circulation of the lithium ion secondary battery can be solved.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides a method for reducing the rough surface roughness of an HVLP copper foil by using a composite additive, which comprises the following steps: step (1): enabling the composite additive to flow into a high-level tank through an additive flow pump, uniformly mixing the composite additive with a copper sulfate electrolyte, and enabling the mixture to flow into a crude foil machine; step (2), then adjusting process parameters of a crude foil machine, including current and line speed of a cathode roller; (3) foil generation and foil drawing are carried out; the composite additive comprises one or two of gelatin and collagen. One or more composite additives composed of gelatin, collagen, sodium dithiodipropane sulfonate, N, N-dimethyl-dithioformamide sodium propanesulfonate, 3-sulfydryl-1-sodium propane sulfonate, hydroxyethyl cellulose and polyethylene glycol are added into the raw foil electrolyte, so that the copper electrodeposition reaction potential can be effectively changed; and uniform and compact copper crystallization peaks are obtained, the rough surface roughness of the raw foil is reduced, and the uniformity of a plating layer is improved.

The invention belongs to the technical field of gear transmission system fault diagnosis, and particularly relates to a gear pitting kinetic model solving method based on microscopic surface topography. Comprising the following steps: establishing a tooth surface morphology and pitting defect model; the tooth surface morphology of the selected gear is sampled, and nonlinear excitation parameters in a gear transmission system are collected; a gear tooth surface morphology mathematical model based on the fractal dimension D and the fractal roughness G is established, and a mixed elastohydrodynamic lubrication coupling analysis mathematical model of the pitted gear under the rough surface is established based on the relation that the curvature radius, the dynamic load, the oil film entrainment speed and the like change along with the change of the meshing position under different surface roughness. And solving the non-linear dynamic mathematical model of the gear with the rough surface. According to the method, the influence of the surface roughness on the rigidity attenuation and pitting extension of the gear can be accurately quantified, the nonlinear dynamic behavior of the gear system under the complex lubrication condition is disclosed, and an analysis method support is provided for the pitting resistance design and life prediction of the gear.

A composite membrane for desalination includes a polyethylene terephthalate (PET) nonwoven layer having a fibrous structure, and has an average thickness of about 30 to 200 micrometers (μm). A polysulfone (PS) layer having an average thickness of about 30 to 100 μm is disposed on a surface of the PET nonwoven layer. Further, a polyamide layer is disposed on a surface of the PS layer including reacted units of an acyl compound, a phenylenediamine monomer, and a poly-(DADMAC-co-DADA). The polyamide layer has a rough surface including a plurality of irregular-sized ridge-and-valley structures of polyamide. The poly-(DADMAC-co-DADA) has a formula (I), and n is a positive integer.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention belongs to the technical field of kitchen ware coatings, and discloses a preparation method of a wear-resistant coating based on nano structure optimization, through a specific ratio of nano silicon carbide, titanium dioxide, boron nitride and silver, four particles form a complementary and synergistic functional system-silicon carbide provides a hardness basis, boron nitride optimizes the antifriction performance by means of a layered structure, and the wear-resistant coating is prepared. Titanium dioxide enhances the chemical stability; by matching with a composite dispersion process of high-energy ball milling and ultrasonic treatment, particle aggregation is broken, so that the coating forms a uniform and compact nano-structure, the structure can effectively disperse friction stress, the wear resistance is remarkably improved, and the service life of the kitchen ware in a high-frequency cooking friction environment is greatly prolonged; a kitchen ware substrate is subjected to 80-mesh white corundum sand blasting to form a rough surface, then impurities are removed through ultrasonic cleaning, and a good interface condition is created for coating adhesion; and a subsequent stepped vacuum curing process promotes chemical bonding of the nanoparticles and the polyimide resin, and the binding force of the interior of the coating and the binding force of the coating and the substrate are enhanced.

A sheath aging resistant cable belongs to the technical field of cables and comprises a conductor assembly and a control wire core assembly, the conductor assembly and the control wire core assembly are sleeved with a sheath unit, the sheath unit comprises an anti-aging additive slow-release structure, and the anti-aging additive slow-release structure comprises an outer slow-release layer, an additive and an inner slow-release layer. The cable is provided with the anti-aging additive slow-release structure, continuously provides protection for the sheath, prolongs the duration of the anti-aging effect, avoids the problem that the conventional protection mode cannot continuously perform the anti-aging effect on the cable sheath in the later period, and is longer in protection time for the cable sheath compared with the conventional mode, and the service life of the cable sheath is prolonged. By arranging the nano sheath, the mechanical property, heat resistance and aging resistance of the sheath material can be enhanced, so that the sheath material can better resist the influence of external stress and environmental factors, mastoid salient points can form a layered structure with a rough surface on the outer wall of the cable, and the effects of soaking corrosion and the like of water in the natural environment on the outer sheath are reduced.

The invention discloses a surface repairing process and a surface repairing method, and relates to the technical field of semiconductor manufacturing processes. The surface repairing technology comprises the steps that first gas is injected into a reaction cavity at a first flow rate, wherein the pressure intensity in the reaction cavity is set to be first pressure intensity, and the temperature in the reaction cavity is set to be first temperature; starting a radio frequency power source to generate free radicals, and maintaining for a first time, so that the free radicals are adsorbed with surface atoms of the to-be-repaired material layer; vacuumizing the reaction cavity, setting the temperature in the reaction cavity to be a second temperature, and maintaining the second temperature for a second time; and setting the pressure in the reaction cavity to be second pressure, injecting second gas into the reaction cavity, and maintaining for a third time. By implementing the surface repairing process and the surface repairing method disclosed by the embodiment of the invention, the free radicals generated in the reaction cavity are fully adsorbed to the rough surface of the wafer substrate with the defects, and are fully combined with the fine defects on the surface through adsorption, so that the reaction rate of the free radicals and the surface material of the substrate to be repaired is improved, and the repairing effect is further improved.

The invention discloses a high-filling type II anhydrite polyethylene composite packaging material and a preparation method thereof, and belongs to the technical field of plastic packaging materials. The composite material comprises modified gypsum which is coated by nano SiO2 and is synergistically modified by double coupling agents, and polyethylene serving as a base material, wherein the addition amount of the modified gypsum is 60%; a gradient temperature control twin-screw extruder is adopted for processing, during extrusion processing, the front-section temperature is 155-165 DEG C, the middle-section temperature is 185-195 DEG C, the rear-section temperature is 205-215 DEG C, and a gradient filler distribution material is formed after extrusion; the problems that under the condition of 60% high doping, II type anhydrite is difficult to disperse in a polyethylene base material, and under the condition of high doping, the material surface is rough are solved.

The preparation technology comprises the following steps that nanometer titanium dioxide with the rough surface is obtained after grinding treatment, the nanometer titanium dioxide with the rough surface, rosin resin and polyisopropyl titanate are dispersed into absolute ethyl alcohol, coated nanometer titanium dioxide is obtained after evaporation and drying, and then the coated nanometer titanium dioxide is dried to obtain the high-permeability down jacket fabric. Carrying out modification treatment on the coated nano titanium dioxide through a silane coupling agent to obtain modified nano titanium dioxide; the polyamide fiber slices and the modified nano titanium dioxide are subjected to melt blending to obtain a melt blend, the melt blend is extruded through a spinning opening, and the dull polyamide yarn is obtained after cooling and curing; the down jacket fabric is obtained by spinning the dull chinlon yarns as warps and wefts, and the strong anti-permeability down jacket fabric is obtained after a PU white coating is formed on the surface of the fabric. The modified nano titanium dioxide can greatly improve the wear resistance of the fabric, and the wear resistance is good in durability, so that the fabric has super-strong extinction and high wear resistance.

The invention discloses a visual simulation device for propping agent migration and pulverized coal generation in coal seam fracturing cracks. The visual simulation device comprises a shell, a transparent cover plate, a pressing mechanism and a coal rock block. The top end of the shell is open, an injection port, a production port and a sensor interface are formed in the top of the side wall of the shell, and a sealing gasket groove is formed in the top of the shell; the transparent cover plate is arranged at the top end of the shell; one surface, close to the shell, of the transparent cover plate is a rough surface; the pressing mechanism is used for pressing and fixing the transparent cover plate on the shell; a crack channel used for simulating migration of a proppant and generation of pulverized coal is formed between the top face of the coal rock block and the transparent cover plate, and the other faces of the coal rock block are all attached to the inner wall of the shell. According to the method, the migration behavior of the proppant in the coal seam crack, the friction effect of the proppant and coal rock and the complex coupling mechanism generated by the pulverized coal can be visually revealed, and the generation amount and the distribution rule of the pulverized coal are quantitatively analyzed, so that reliable experimental basis and technical support are provided for optimizing coal seam gas fracturing construction parameters and improving crack flow conductivity and production efficiency.

The invention discloses a machining method for improving the quality of a carrier plate through laser drilling. The machining method comprises the following steps that a first copper foil layer is cleaned, and the surface roughness of the first copper foil layer is detected; a laser drilling machine is adopted to machine a plurality of grooves in the surface of the first copper foil layer; the laser drilling machine performs roughness processing on the surface of the first copper foil layer in an out-of-focus scanning mode to form a rough surface with a convex structure; and the second dielectric layer is laminated with the first copper foil layer subjected to roughness processing. According to the method, laser drilling is directly adopted to carry out groove and roughness processing on the copper foil layer, and after the groove is additionally formed in the surface of the copper foil layer, the groove is filled with the filling material to form a mechanical anchoring point; meanwhile, due to the surface roughness design of the copper foil layer, the filling material can be better attached, the interlayer binding force is enhanced, and layering is avoided; in addition, the groove serves as a part of a heat conduction path, the high heat conductivity of copper can be utilized, heat distribution can be more uniform, heat can be transmitted to surrounding materials more quickly, and heat stress is reduced.

A compression forming die for a powder metallurgy dumbbell comprises an upper die part, a middle die plate, a lower die part, an upper die stripping driving part, a lower die stripping driving part, a dumbbell head upper die core, a feeder, an operation table and a material receiving plate. Through the combination of an upper die part, a middle die plate, a lower die part, an upper die stripping driving part, a lower die stripping driving part, a dumbbell head upper die core, a feeder, an operation table and a material receiving plate which are of a specific structure, powder metallurgy powder is pressed at a time, and a powder metallurgy precision dumbbell product can be obtained. The defects of large boundary dimension precision error, rough surface, high energy consumption, heavy pollution, no energy conservation, environmental protection, long production period and high cost in the production of cast iron type steel dumbbell products can be overcome. Energy can be saved, consumption can be reduced, the production cycle can be shortened, the production cost can be reduced, the product quality can be improved, and the market competitiveness can be improved.

The invention relates to the technical field of copper foil surface treatment, in particular to a copper foil and a preparation method and application thereof. The copper foil comprises an electrolytic copper raw foil, and a roughening treatment layer, a catechol-based polymer layer and a silane coupling agent layer which are sequentially laminated on the rough surface of the electrolytic copper raw foil. According to the copper foil, the catechol-based polymer layer is introduced between the roughening treatment layer and the silane coupling agent layer, the catechol-based polymer layer contains rich functional groups such as hydroxyl and amino, the number of attachment sites of a silane coupling agent on the surface of the copper foil is increased, and then the binding force of the silane coupling agent and the copper foil is increased; meanwhile, rich functional groups can also improve the binding force between the copper foil and various base materials, so that the copper foil has higher peel strength under the condition of keeping lower roughness during application.

The invention discloses a quartz fiber surface modification method and application thereof. The modification method of the quartz fiber comprises the following steps: introducing a low-dielectric polyimide coating on the surface of the quartz fiber, wherein the coating consists of high-heat-resistance non-melting and insoluble polyimide; and nano silicon dioxide microspheres with hollow mesoporous structures are introduced to form a rough surface in the polyimide coating, so that the chemical polarity and roughness of the surface of the quartz carbon fiber are jointly improved. According to the method, on the basis that the dielectric property of the quartz fiber is not reduced, the CTE mismatching between the quartz fiber and the resin is remarkably improved, the interface adhesion strength after cold and hot cycling is improved, the excellent dielectric property of the quartz fiber and the high heat resistance of the polyimide resin are fully played, and the method is suitable for continuous and large-scale production and has wide application prospects. And particularly, the composite material can meet the strict requirements of the modern aerospace industry on light weight, high strength, low dielectric, low water absorption and thermal cycling impact resistance of the composite material.

The invention discloses a battery piece, a preparation method of the battery piece, a battery string and a photovoltaic module, and belongs to the technical field of photovoltaics. The cutting surface comprises two end parts and a middle part positioned between the two end parts; the surface roughness of the end part is greater than that of the middle part; the end part comprises a first surface and a second surface; the first surface and the second surface are arranged in a step shape; in the thickness direction of the battery piece, the first surface is close to one side of the backlight surface, and the second surface is close to one side of the illuminated surface; the roughness of the first surface is larger than that of the second surface. According to the invention, the two rough surfaces with the height difference are formed at the two end parts of the cutting surface corresponding to the chamfering position, so that more light can be absorbed.

The invention relates to the technical field of buildings, in particular to a construction method and system of a heat preservation curtain wall. The method comprises the following steps that a heat preservation curtain wall body wall surface structure is obtained; the method comprises the following steps: detecting a wall surface void area based on a thermal insulation curtain wall main body wall surface structure to obtain void area data; wall surface structure repairing is conducted based on the honeycomb pitted surface area data, and a heat preservation curtain wall repairing wall surface structure is obtained; pre-embedded connecting pieces are arranged on the basis of the heat preservation curtain wall repairing wall face structure, coordinates of reserved anchoring holes are marked, and an anchoring hole instruction is generated; curtain wall keel construction is conducted on the heat preservation curtain wall repairing wall face structure according to the anchoring hole instruction, and curtain wall keel data are obtained; performing high-temperature simulation based on the curtain wall keel data to obtain curtain wall keel high-temperature expansion data; setting a keel connection deformation space based on the curtain wall keel high-temperature expansion data, and designing a curtain wall connection movable structure based on the keel connection deformation space. The heat energy utilization rate and the structural adaptability of the curtain wall system are improved based on the building technology.