19results about How to "Large aperture" patented technology

The application discloses a kind of based on dual atomic norm minimization multipath high-order QAM signal direct positioning method, first, construct distributed multi-sensor array positioning model under multipath environment, receive signal is obtained;Second, the simplified fourth-order cumulant of each sensor array received signal is calculated, and it is extended to obtain virtual signal;Then, respectively construct semi-positive definite constraint problem, and the dual vector is solved to obtain;Finally, all dual vectors are combined to construct cost function and directly search emitter position, and the position estimation value is obtained.The kind of direct positioning method based on dual atomic norm minimization multipath high-order QAM signal that the application designs can effectively locate emitter.In addition, the method makes full use of the characteristics of high-order QAM signal, can extend array aperture, estimates more emitters.The positioning performance of the application is superior to the traditional spatial smoothing subspace data fusion direct positioning method and discrete fourier transform direct positioning method.

This invention discloses a high spatiotemporal resolution millimeter-wave radar imaging system, comprising: a U-shaped antenna array module, wherein the transmitting and receiving antennas are symmetrically distributed in a U-shape, with an element spacing greater than or equal to half a wavelength, adapted to the SAR imaging mechanism, and using an electronic scanning scheme to achieve beam scanning; a radio frequency (RF) module, employing a cyclic one-transmit-multiple-receive mode, completing data acquisition for all transmitting and receiving channels by cyclically switching the transmitting elements to ensure high system refresh rate and spatiotemporal resolution; a signal processing module, receiving multi-channel echo signals, rearranging the echo signals, and using a hardware-parallel accelerated time-domain backpropagation (BP) algorithm for imaging; and a control module, using a microcontroller to control the RF chip of the RF module. This invention verifies the applicability of antenna spacing greater than or equal to half a wavelength in near-field SAR imaging mechanisms, overcomes the dependence of traditional MIMO systems on antenna half-wavelength spacing, achieves high spatiotemporal resolution near-field imaging, and reduces system complexity and cost.

This invention provides a method for preparing and applying a catalyst for co-thermal pyrolysis of waste plastics and biomass, comprising the following steps: Step 1, mixing FCC waste catalyst, sodium carbonate, and a metal oxide precursor uniformly to form a powder; Step 2, modifying HZSM-5 molecular sieve with phosphorus; Step 3, mixing the mixture obtained in Step 1, the phosphorus-modified ZSM-5 molecular sieve from Step 2, a binder, and water to form microspheres, calcining to obtain the catalyst for co-thermal pyrolysis of waste plastics and biomass. The catalyst prepared by this invention has a large pore size and pore volume, and when used for co-thermal pyrolysis of waste plastics and biomass, the liquid yield is greater than 70%.

This application discloses an optical lens. The optical lens, along the optical axis from the object side to the image side, sequentially includes: a first lens with negative optical power, whose image side is concave; a second lens with optical power, whose object side is concave and image side is convex; a third lens with optical power, whose object side is convex; a fourth lens with positive optical power, whose image side is convex; a fifth lens with positive optical power, whose object side and image side are both convex; a sixth lens with negative optical power, whose object side is concave; a seventh lens with positive optical power, whose object side and image side are both convex; and an eighth lens with optical power, whose object side is convex and image side is concave. The sum of the distances between any two adjacent lenses on the optical axis, ∑AT, and the distance on the optical axis from the object side of the first lens to the image plane of the optical lens, TTL, satisfy: 0.1 ≤ ∑AT / TTL ≤ 0.2.

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

The invention discloses a silicon oxide microsphere as well as a preparation method and application thereof. The silicon oxide microspheres are large-aperture silicon oxide microspheres, the specific surface area is 395-750m < 2 > / g, the pore volume is 1.0-3.5 ml / g, and the average aperture is 17-50nm. The silicon oxide microspheres have the characteristics of large specific surface area, large pore volume and large pore diameter, and the catalyst prepared by using the silicon oxide microspheres as the carrier has the advantage that the activity is remarkably improved when the catalyst is applied to olefin polymerization reaction.

The application discloses a kind of porous graphite, preparation method and application of silicon-carbon composite material, belong to battery material technical field.The preparation method is: metal, petroleum coke and its dopant are mixed uniformly, pre-carbonization, graphitization, obtain graphite material, then it is etched to pore by plasma technology, then activation, obtain porous graphite;Finally by silane cleavage method, pass in silane mixed gas and carry out nanometer silicon deposition, passivation, then the obtained material is added to the solution of lithium molybdate and lithium sulfonate and coated, spray drying, obtain double lithium compound coated silicon-carbon composite material.The obtained material utilizes the characteristics that porous graphite itself electronic conductivity is high, and the outer layer coated double lithium salt structure improves ionic conductivity and its first efficiency, and plays the synergistic effect between the two, reduces expansion, improves cycle performance.

The utility model provides an end cover assembly of oil -filled air compressor outer rotor motor belongs to mechanical technical field. It solved the problem of inconvenient maintenance of existing outer rotor motor. The end cover assembly of oil -filled air compressor outer rotor motor of present application includes end cover body and the stator support of setting in the end cover body rear side and being the barrel, the inboard wall of stator support is integrally formed with a ring connecting pipe, and the axis of connecting pipe and stator support is parallelly arranged; The rear end surface of end cover body is formed with the connecting portion of ring, and the rear end of connecting portion is inserted into the front end of stator support, and the threaded hole is axially arranged on the rear end of connecting portion, the number of connecting pipe and threaded hole is same and the position is one to one correspondence; The front end surface of connecting pipe is pressed on connecting portion, and the bolt is arranged in each connecting pipe, the head of bolt is pressed on corresponding connecting pipe, and the bolt rod is screwed into corresponding threaded hole. The end cover assembly of oil -filled air compressor outer rotor motor of present application is beneficial to motor maintenance.

This invention discloses a method for preparing silica microspheres, the prepared silica microspheres, and their applications. The method for preparing silica microspheres includes: (1) heating a mixture of n-alkane and pitch under reflux to separate a solid product; (2) mixing the solid product from step (1) with a mixture of aromatics I, a first silicon source, a polyoxyethylene-polyoxypropylene-polyoxyethylene copolymer, and water to obtain a crystallization solution, followed by hydrothermal crystallization and calcination to obtain an intermediate product; (3) mixing the intermediate product from step (2), a second silicon source, a pore-forming agent, and water to obtain a slurry; then, spray-drying and calcining the slurry to obtain the silica microspheres. The silica microspheres prepared by this method have the advantages of large specific surface area, large pore volume, and large average pore size, which significantly improves polymerization activity in olefin polymerization reactions.

The application provides an optical lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, a first lens with negative optical power, wherein the object side surface of the first lens is a convex surface and the image side surface of the first lens is a concave surface; a second lens with positive optical power; a third lens with positive optical power, wherein the object side surface of the third lens is a convex surface; a fourth lens with positive optical power, wherein the image side surface of the fourth lens is a convex surface; a fifth lens with negative optical power, wherein the object side surface of the fifth lens is a convex surface and the image side surface of the fifth lens is a concave surface; a sixth lens with positive optical power, wherein the object side surface of the sixth lens is a convex surface and the image side surface of the sixth lens is a convex surface; and a seventh lens with negative optical power, wherein the object side surface of the seventh lens is a concave surface and the image side surface of the seventh lens is a convex surface; the optical total length TTL of the optical lens satisfies 14.2mm<TTL<15.2mm; and the optical total length TTL of the optical lens and the effective focal length f of the optical lens satisfy 3<TTL / f<5. The optical lens provided by the application can improve the imaging quality of the optical lens and has the advantage of excellent imaging quality by specific surface shape matching and reasonable optical power distribution.

The present application relates to a kind of ITS intelligent traffic lens, the front lens group A is sequentially arranged from left to right by positive lens A-1, meniscus negative lens A-2, meniscus positive lens A-3, meniscus negative lens A-4 along the light path of light incidence, wherein meniscus negative lens A-2 and meniscus positive lens A-3 constitute double cemented lens;The rear lens group B is sequentially arranged from left to right by double concave negative lens B-1, double convex positive lens B-2, double convex positive lens B-3, double convex positive lens B-4, double convex positive lens B-5, double concave negative lens B-6, double convex positive lens B-7, negative lens B-8 along the light path of light incidence, wherein double concave negative lens B-1 and double convex positive lens B-2, double convex positive lens B-5 and double concave negative lens B-6, double convex positive lens B-7 and negative lens B-8 respectively constitute double cemented lens;12 pieces of glass spherical lens are used, and the parameters such as the shape, thickness and air gap of each lens are optimized, to meet the optical performance such as large target surface, large optical aperture and high resolution, while meeting the requirements of day and night confocal, high and low temperature stability.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with negative optical power, the first side of the first lens being a convex surface and the second side being a concave surface; a second lens with negative optical power, the first side of the second lens being a concave surface; a third lens with optical power; a fourth lens with optical power; a fifth lens with positive optical power, the first side of the fifth lens being a convex surface and the second side being a convex surface; a sixth lens with positive optical power, the first side of the sixth lens being a convex surface and the second side being a convex surface; a seventh lens with negative optical power, the first side of the seventh lens being a concave surface; an eighth lens with optical power; and a ninth lens with negative optical power. The application solves the problem that the optical lens in the prior art cannot simultaneously meet the requirements of high resolution, large aperture, low sensitivity, long back focal length, high light flux and confocal in the visible light range.

The application belongs to the field of oil-water separation treatment, and specifically discloses an organic silicon modified dry paper for oil-water separation and a preparation method thereof, which comprises the following steps: mixing alkyl chain organosiloxane and cationic photoinitiator, uniformly stirring at room temperature in the dark to obtain a photosensitive organic silicon mixture; taking the prepared photosensitive organic silicon mixture, adding it into an airbrush, and uniformly spraying it on a dry paper to obtain the organic silicon modified dry paper for oil-water separation through photopolymerization. In the application, the organic polysiloxane obtained through hydrolysis and condensation has a three-dimensional network structure, excellent wear resistance and solvent resistance, and is combined with the good tensile strength and large pore size of the substrate dry fiber paper, so that the application has excellent oil-water separation performance and can be reused more than 50 times. The application has simple raw materials, low cost, degradable substrate, green environmental protection, simple preparation process, short time, no use of organic solvents, and small pollution. The reaction condition is easy to achieve, and the application is suitable for large-scale production and application.

The application discloses a methanol steam hydrogen production catalyst and a preparation method and application thereof, and belongs to the hydrogen production technical field. The preparation method of the methanol steam hydrogen production catalyst comprises the following steps: (1) dissolving aluminum salt, copper salt and zinc salt in deionized water to obtain a mixed salt solution; stirring and uniformly mixing anhydrous ethanol solution of a surfactant, adjusting the pH value to 6.5-7.5 by using lye, standing and aging at room temperature, and obtaining a precursor through filtering, washing and drying; and (2) placing the precursor into a tube furnace to perform calcination, and obtaining the methanol steam hydrogen production catalyst. The methanol steam hydrogen production catalyst prepared by the application has a relatively high specific surface area, a relatively large pore size and a pore volume, and has a relatively high conversion rate, a relatively high stability and a relatively low CO selectivity when being used for catalyzing hydrogen production from methanol steam.

The invention provides an optical lens, which comprises five lenses from an exit pupil side to an image source side along an optical axis: a diaphragm; the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; and the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface. The optical lens achieves the effects of small size, light weight, total length and large aperture.

The application discloses a zoom lens, which comprises a first fixed lens group, a first variable lens group, a second variable lens group, a focusing lens group and a second fixed lens group; the optical power of the first fixed lens group, the second variable lens group and the focusing lens group is positive, and the optical power of the first variable lens group is negative; the first fixed lens group comprises a first to fourth lens; the first variable lens group comprises a fifth to seventh lens; the second variable lens group comprises an eighth to eleventh lens; the focusing lens group comprises a twelfth lens and a thirteenth lens; the second fixed lens group comprises a fourteenth lens; the first lens, the fifth lens, the sixth lens, the tenth lens and the thirteenth lens are negative power lenses; the second lens, the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the eleventh lens and the twelfth lens are positive power lenses. By matching the lens groups and the optical power of the lenses in the five-group zoom lens, the imaging quality is improved.

This invention discloses an ultra-large aperture, large target surface, thermal-free long-wave infrared optical system suitable for 8µm pixel modules, comprising, from object to image: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5; the first lens L1 is a meniscus aspherical lens with negative optical power and a convex surface bent towards the object; the second lens L2 is a meniscus aspherical lens with negative optical power and a convex surface bent towards the image; the third lens L3 is a meniscus aspherical lens with positive optical power and a convex surface bent towards the object; the fourth lens L4 is a plano-convex diffraction lens with positive optical power and a convex surface bent towards the object; and the fifth lens L5 is a meniscus aspherical lens with negative optical power and a convex surface bent towards the object. The optical system of this invention features an ultra-large aperture, sufficient energy, high sensitivity, and high spatial resolution; it has a large target surface field of view and can be matched with a 15.36mm×8.64mm target surface long-wave camera; under the premise of large aperture, it achieves a thermal design with a temperature range of -40℃ to 80℃; and it has excellent image quality.

This invention relates to a composite sodium-replenishing material, its preparation method, an electrode, and a battery. The composite sodium-replenishing material comprises a matrix, a sodium-replenishing agent body, and a conductive reinforcement. The matrix is ​​porous carbon fiber; the sodium-replenishing agent body is distributed on the surface and within the pores of the matrix; the conductive reinforcement is partially embedded within the sodium-replenishing agent body and partially located on its outer surface. The preparation method of the composite sodium-replenishing material includes the following steps: hydrothermal treatment of a dispersion; the dispersion comprises porous carbon fibers, sodium salt, and a conductive reinforcement. The composite sodium-replenishing material of this invention can improve the initial efficiency and capacity retention of sodium-ion batteries.