20results about How to "Wide choice" patented technology

The invention belongs to the field of petrochemical engineering, and particularly relates to high-stability rubber composite modified asphalt and a preparation method thereof. The rubber composite modified asphalt provided by the invention comprises the following components in parts by mass: 100 parts of petroleum asphalt, 2-3 parts of an SBS modifier and 20-30 parts of a rubber modifier. 0.1-0.3 part of a stabilizer and 2-3 parts of a cosolvent; the petroleum asphalt is 70 # road petroleum asphalt, and the needle penetration is 60-801 / 10mm; the SBS modifier is a styrene-butadiene-styrene block copolymer, the mass ratio of a styrene chain segment to a butadiene chain segment in the block copolymer is 30: 70, and the weight-average molecular weight of the block copolymer is 150000-250000; the rubber modifier is desulfurized rubber particles, and the particle size is 30-60 meshes. The rubber composite modified asphalt provided by the invention has excellent storage stability on the basis of meeting basic index requirements of asphalt products.

The invention belongs to the technical field of organic chemistry, and particularly discloses a synthesis method of an oxazoline compound, which comprises the following steps: S1, sequentially adding magneton, an olefin compound, an amide compound, electrolyte and an iodine catalyst into a three-neck bottle, and mixing; s2, after mixing is completed, a carbon rod electrode is assembled to serve as a positive electrode, and a nickel sheet electrode is assembled to serve as a negative electrode; s3, carrying out an addition reaction under a power-on condition; and S4, after the addition reaction is finished, removing the organic solvent, and purifying the obtained product to obtain the oxazoline compound. By adopting the synthesis method of the oxazoline compound, the invention provides a convenient method for cyclizing and synthesizing the oxazoline compound from olefin and amide under mild reaction conditions, and an oxidizing agent and alkali do not need to be additionally added.

The invention relates to a solar photo-thermal energy storage technology and application, in particular to a photo-thermal multi-source energy storage heat station. In order to fully utilize solar energy and conveniently meet production energy consumption, the invention provides a photo-thermal multi-source energy storage heat station which comprises a photo-thermal system, an energy storage device, a heat supply component and a user system, the photo-thermal system is composed of a solar heat collection device, a heat transfer working medium pipeline component and a heat transfer working medium power and / or control component, the energy storage device is a layered energy storage device; the user system comprises gas heating, thermodynamic cycle, hot water or steam production, medium heating and the like; the photo-thermal multi-source energy storage heat station has the beneficial effects that the solar photo-thermal utilization potential is excavated, an electric heating device and / or a combustion type enthalpy change heating device can be additionally arranged to serve as a supplementary heat source, the photo-thermal system technology is mature, the selection range of heat storage materials of an energy storage device is wide, the layered energy storage and layered energy release technology is adopted, and therefore the device is compact in structure and convenient to use. The heat supply component supplies heat through heat exchange, and the user system is widely applied; the photo-thermal multi-source energy storage heat station can serve as a heat energy production and supply scheme with a scene rich in solar energy resources, and the heat energy production and supply scheme comprises but not limited to mining sites, oil field exploitation and transportation, remote buildings, thickened oil heating, production process heat consumption, agriculture and animal husbandry production and other heat energy supply schemes.

The invention belongs to the technical field of petrochemical engineering, and particularly relates to composite modified hydraulic asphalt and a preparation method thereof. The hydraulic asphalt is prepared from the following components in parts by mass: 100 parts of petroleum asphalt, 5 to 10 parts of SBS modifier, 15 to 25 parts of rubber modifier, 15 to 25 parts of cosolvent and 0.1 to 0.3 part of stabilizer. According to the invention, a scheme of compounding two types of modifiers, namely the rubber powder and the SBS, is adopted, the product process is simple, the structure is stable, and the composite modified hydraulic asphalt disclosed by the invention has a specific three-dimensional elastic net-shaped structure through specific stabilizer composition and a mass ratio of a styrene chain segment to a butadiene chain segment in the SBS modifier; and the adhesive can meet the requirements of special environments, and is relatively high in viscosity. The production is simple, the high-low temperature performance is excellent, the quality of the hydraulic asphalt is improved, and the application performance of the hydraulic asphalt in a special environment is ensured.

This invention belongs to the field of catalyst preparation and application technology, and discloses a method for preparing sulfur-bridged bimetallic alkyne complexes and their application in the dehydrogenation coupling synthesis of 1,4-diyne. The method uses thiols or thiophenol salts as bridging ligands, with each metal center coordinated with a cyclopentadienyl group or a substituted cyclopentadienyl group. This invention achieves coordination activation of the terminal alkyne by controlling the oxidation state of the metal center and altering the bonding mode of the terminal alkyne at the metal center. In this system, the sulfur-bridged ligand not only assists the metal center in activating the terminal alkyne but also stabilizes a key intermediate in the catalytic process. Subsequently, the coordinated-activated terminal alkyne undergoes a reductive elimination process to generate 1,4-diyne. This reaction can be carried out in a temperature range of -100℃ to 25℃, with a reaction time of 0.5 to 48 hours. This method can synthesize a series of novel sulfur-bridged bimetallic alkyne complexes with high yield and high selectivity, providing a novel catalytic system for the activation of C-H bonds in terminal alkynes mediated by inexpensive metals and the further synthesis of 1,4-diyne.

The application belongs to the technical field of paint, and particularly relates to high stone impact resistance and free grinding water-based intermediate coating for buses, and a preparation method and application thereof. The high stone impact resistance and free grinding water-based intermediate coating is combined by component A resin paint and component B curing agent according to a weight ratio of 5:1. The component A resin paint comprises the following components: hydroxyl acrylic resin, deionized water, dispersing agent, anti-settling agent, defoaming agent, leveling agent, wetting agent, titanium white powder, talcum powder, flatting powder, thickening agent and solvent A. The component B curing agent comprises the following components: curing agent and solvent B. Compared with the prior art, the application solves the problem that the intermediate coating of the automobile coating in the prior art still needs to be polished during the construction process, thereby leading to complex steps and dependence on the experience of workers. The intermediate coating of the scheme has excellent performance and realizes free polishing operation during the construction process.

The invention provides a method for realizing an H265 video stream based on nginx, electronic equipment, a server and a storage medium, and the method comprises the following steps: S1, nginx installation: firstly installing nginx on the server, and carrying out installation configuration according to an official document; s2, third-party transcoding software is installed, specifically, the third-party transcoding software is installed on the nginx server, and after the third-party transcoding software is installed, the third-party transcoding software needs to be added into the environment variables; and S3, configuring nginx: in an nginx configuration file, adding transcoding configuration including transcoding input, transcoding output and transcoding format information. The method has the beneficial effects that the function of converting the local video into the H265 video stream is realized by utilizing the modular architecture of the nginx server and third-party transcoding software, so that the transmission efficiency and quality of the video are improved. In addition, the method has the advantages of flexible configuration, easy deployment and maintenance and the like.

The invention provides a release-film-free rapid photocuring 3D printing method. The release-film-free rapid photocuring 3D printing method comprises the following steps that photosensitive resin is added into a resin trough; the printing chamber is inversely buckled and fixed in the resin trough, so that a liquid level difference is generated between the liquid level in the printing chamber and the liquid level in the resin trough, and a positive pressure or negative pressure air environment is formed in the printing chamber; setting printing parameters of the three-dimensional model through slicing software, and importing the printing parameters into a control system; patterns displayed on a display screen of a projection device are exposed and cured at the liquid level of a printing cavity layer by layer through a control system, after exposure of each layer is completed, the control system controls a servo motor to drive a lifting module to act, and then a printing platform is driven to descend by the distance of one layer thickness; the liquid level in the printing cavity is fast and stable, the steps are repeated, and exposure curing of the next layer is carried out until printing forming of the model is completed; and the formed model on the printing platform is taken out, and residual resin on the surface is cleaned through ultrasonic treatment. According to the release-film-free rapid photocuring 3D printing method, in the 3D printing process, the liquid level can be rapidly stabilized, no bubble is generated, and the 3D printing efficiency and the product surface precision are remarkably improved. The invention further provides a release-film-free rapid photocuring 3D printing device.

The invention discloses a medium-speed mill direct-blowing pulverizing system suitable for extra-high moisture lignite, and the main technical scheme adopted is: a primary fan; a rotary air preheater, which is connected to the outlet of the primary fan through a first cold primary air duct, and the smoke outlet of the rotary air preheater is connected to the smoke exhaust duct of the rotary air preheater; a tubular air preheater, the hot primary air inlet of the tubular air preheater is connected to the rotary air preheater through the hot primary air duct of the rotary air preheater, and the smoke outlet of the tubular air preheater is connected to the smoke inlet of the rotary air preheater through a first bypass duct; a medium-speed coal mill, which is connected to the primary fan through a second cold primary air duct and is connected to the hot primary air outlet of the tubular air preheater through the hot primary air duct of the tubular air preheater; a boiler, whose main smoke outlet is connected to the smoke inlet of the rotary air preheater, and the bypass smoke outlet of the boiler is connected to the smoke inlet of the tubular air preheater through a second bypass duct.

The invention relates to a solar heat storage technology and application, in particular to a photo-thermal energy storage application system. In order to fully absorb and utilize solar energy and conveniently release energy to meet production energy, the invention provides a photo-thermal energy storage application system which comprises a photo-thermal system (H0), an energy storage device and a heat supply component, the photo-thermal system (H0) is composed of a solar heat collection device, a heat transfer working medium pipeline component and a heat transfer working medium power and / or control component, a gas heating, heating / refrigerating primary side and a working medium pipeline which is used for producing steam or a turbine and the like and needs heat energy in the production process are connected with a heat supply component for heat exchange and heat absorption; the photo-thermal energy storage application system has the beneficial effects that the applicable photo-thermal system (H0) technology is mature, the selection range of heat storage materials of an energy storage device is wide, the layered energy storage and layered energy release technology is adopted, so that the device is compact in structure, heat exchange heat supply of a heat supply component has small interference on the application system, and the matching selection range of the application system is wide; the photo-thermal energy storage application system can be developed and implemented as a process framework scheme of a solar photo-thermal utilization project.

The present invention relates to the technical field of polyunsaturated fatty acid ester synthesis, and in particular to a method for preparing polyunsaturated fatty acid ester. In the preparation method provided by the present invention, phospholipid-type polyunsaturated fatty acids are prepared by enzymatic reaction of raw materials including the following components: polyunsaturated fatty acid esters, polyunsaturated fatty acid salts, phospholipids and lipase, wherein the polyunsaturated fatty acids corresponding to the polyunsaturated fatty acid esters are of the same type as the polyunsaturated fatty acids corresponding to the polyunsaturated fatty acid salts. The method has a wide selection of raw materials, is independent of organic solvents, is applicable to a variety of reaction environments, can achieve a high fatty acid access rate in a system without organic solvents, and the content of polyunsaturated fatty acids in the prepared phospholipid-type polyunsaturated fatty acids is significantly improved, which is suitable for large-scale promotion and application.

The invention relates to the field of sealing, and provides a sealing structure. The sealing structure comprises a flexible clamping sleeve, and a containing groove is formed in the flexible clamping sleeve. The deformation part is arranged in the containing groove, a containing cavity used for being filled with a working medium is formed in the deformation part, and the working medium is used for driving the outer wall of the deformation part to be attached to the inner groove wall of the containing groove. According to the sealing structure, it can be guaranteed that the excellent sealing performance can be kept under different working conditions and environment changes, and the problems that due to the fixed shape of a traditional sealing piece, sealing fails, and the sealing capacity cannot be flexibly adjusted are solved. And meanwhile, when the sealing pressure is adjusted, the sealing capacity can be adjusted in real time without shutdown overhaul or sealing element disassembly and assembly. The flexible clamping sleeve and the deformation piece are wide in material selection and can be selected in a customized mode according to the requirements of specific application scenes. The sealing structure is simple in design, a complex adjusting process is not needed during installation, the installation difficulty and cost are reduced, and meanwhile the maintenance cost is reduced.

The invention relates to a local strengthening stamping method for an automobile horn mesh enclosure, belongs to the technical field of metal stamping, and aims to solve the technical problems that in the stamping forming process of an existing metal horn mesh enclosure, a complex curved surface area is prone to cracking and mesh deformation, and the strength of an edge mounting part is insufficient. The invention provides a composite stamping process comprising multi-station progressive forming and local pressurization strengthening. The method comprises the following steps: carrying out annealing softening treatment on a metal plate pre-etched with meshes; carrying out integral preforming through a first station; in the second station, a die with a local strengthening male die is used for conducting local pressurization strengthening stamping on the corner curved surface, the edge turnup and the installation buckle position of the mesh enclosure, and material flowing and thickness distribution of a strengthening area are controlled; and finally finishing and stamping. The forming quality of the metal horn mesh enclosure in a complex shape can be effectively improved, the structural strength of key parts is enhanced, it is guaranteed that meshes are uniform and transparent, the product yield is remarkably increased, and the service life is remarkably prolonged.

The invention belongs to the technical field of functional material preparation, and particularly relates to a porous wall-shaped tin sulfide micron material and a preparation method thereof.The preparation method comprises the steps that a tin source precursor is added into an alcohol solvent to be stirred at the room temperature, then a sulfur source is added, stirring continues to be conducted at the room temperature to be evenly mixed, the obtained precursor mixed solution is subjected to a hydrothermal reaction at the temperature of 120-180 DEG C, and the porous wall-shaped tin sulfide micron material is obtained. And carrying out centrifugal washing and vacuum drying on the product after reaction and cooling to obtain the product. The single-component porous wall-shaped tin sulfide micron material prepared by the method has the characteristics of high specific surface area, rich surface active sites, adjustable mass transfer channels and the like due to the unique porous wall-shaped structure, has efficient catalytic degradation performance on methylene blue, and has important research value in the field of porous materials.

The invention discloses a monkey pox virus multi-branch subtype nucleic acid detection and typing method, which comprises the following steps: step 1, comparing monkey pox virus subtypes I a, I b, I I a, I I b and other orthopox virus whole genome sequences to find sites meeting specific conditions, including gene position and single nucleotide polymorphism (SNP) site distribution; 2, fluorescent molecular probes are designed at the sites meeting the conditions, the fluorescent molecular probes comprise a molecular beacon probe, a TaqMan probe and other double-labeled fluorescent molecular probes with a fluorescent marker (Reporter) and a quenching marker (Quencher), the prepared kit uses a multi-probe combination of different fluorescent markers, the detection sensitivity is high, and the detection sensitivity is high. The kit can be used for in-vitro qualitative detection of at least four subtypes of the monkey pox virus in a human swab sample, including detection typing of Ia, Ib, IIa and IIb, is applicable to various sample types including skin lesion samples, swabs containing rash surfaces and exudates and throat swabs, can meet different clinical detection requirements, and provides wider choices for detection of the monkey pox virus.

The invention discloses a large-size single crystal gold sheet based on polycrystalline gold film recrystallization and a preparation method of the large-size single crystal gold sheet, the thickness of the gold sheet is 10-100nm, the transverse size of the single crystal gold sheet is greater than 20 microns, and the transverse size of the large-size single crystal gold sheet is greater than 50 microns. According to the method, the single crystal gold piece is synthesized based on polycrystalline gold film recrystallization, the coverage rate of the single crystal gold piece can reach more than 1000 pieces per square centimeter, only two substances of tetra-n-octyl ammonium bromide and gold are involved, compared with a solution growth method, impurities are more difficult to introduce, the synthesized gold piece has fewer surface pollutants, and the quality of the gold piece is improved. The covering of another substrate plays an indispensable role in the initial nucleation link of the gold platelets, and no gold platelets are synthesized if nucleation cannot be carried out. And meanwhile, large-size growth is also facilitated in the subsequent growth link, so that compared with the prior art, a gold sheet with a larger size can be obtained within the same time, the root mean square roughness of the surface of the single crystal gold sheet is smaller than 0.5 nm, the ultra-flat surface quality is achieved, and the optical loss of the single crystal gold sheet is greatly reduced.

The invention discloses a device and a method for rapidly detecting the thickness of a special boss mounting seat. The device comprises a supporting column, a detection rod, an outer sleeve body, a spring, a detection main body, a dial indicator, an indicator frame and an indicator alignment block. The detection rod, the outer sleeve and the spring are assembled on one side of the detection body, the dial indicator is assembled on the other side of the detection body, the supporting column is installed on the back face of the boss installation base to form a detection datum plane, and the dial indicator is placed in the front face of the boss installation base through the detection rod to conduct boss thickness detection. According to the invention, zero setting processing of the dial indicator is realized through the indicator block, and whether the thickness value is qualified or not is rapidly judged by observing whether the pointer deflection amount of the dial indicator is within the thickness tolerance range of the boss mounting seat or not. The detection method is high in efficiency, can quickly judge whether the thickness of the boss mounting base is qualified or not, is suitable for the detection process of a large number of boss mounting bases, and effectively improves the machining efficiency.

The invention provides an electronic assembly. The electronic assembly comprises a radiator, and a channel is formed in the radiator in a cutting mode. A thermal interface material is disposed between the heat sink and the electronic device. A compressible filler is disposed in the channel to surround and confine the thermal interface material.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a preparation method and application of a metal ion doped synthetic layer oxygen positive electrode material. The embodiment verifies that the layered oxygen positive electrode material NaxAyNi0. 33Fe0. 33Mn0. 33O2 prepared by the method provided by the invention is uniform in particle size, high in porosity, high in crystallinity and good in crystal form, and is a typical O3-phase layered oxygen positive electrode material. An embodiment verifies that the layered oxygen positive electrode material prepared by the invention has higher specific capacity, first-week coulombic efficiency and more excellent rate capability, cycling stability and air stability, and solves the problems of rapid capacity attenuation, poor rate capability and cycling stability, instability in air and the like in the charging and discharging process of the material. The method provided by the invention is simple in synthesis process and low in cost, and can meet the requirements of large-scale production.

The present invention relates to the technical field of composite material preparation and application, and provides a method for preparing an IL@MIL-101 composite material and a method for preparing an IL@MIL-101 composite material in CO 2 The preparation method comprises: S1, exchanging tributyl ethylphosphonium bromide solution with alkaline ion exchange resin to obtain [P 4442 ][OH] aqueous solution; S2, the obtained [P 4442 ][OH] aqueous solution and organic acid H n X was neutralized, stirred for a period of time, and then rotary evaporated and dried to obtain [P 4442 ] n [X] ionic liquid; S3, disperse MIL-101 in the solvent, add [P 4442 ] n [X] The ionic liquid is mixed, stirred for a period of time, and centrifuged to dry to obtain the IL@MIL-101 material. The ionic liquid in the method of the present invention has a wide range of choices and is suitable for CO 2 Capture of CO 2 / N 2 Gas separation has strong universality; the preparation method is simple, the operation is simple and fast, it is green and environmentally friendly, and the cost is low.