305results about How to "Easy to batch" patented technology

The invention discloses a method and a system for a file download service. The method comprises the following steps that: a file download service device receives a download request message sent by a terminal, the download request message comprises terminal information and information on requesting for downloading files, and the terminal sends the information on requesting for downloading the filesto a file packing device when the terminal has a download authority; the file packing device packs the files requested for downloading according to the information on requesting for downloading the files, and sends the packed file address to a file download service device; and the file download service device sends the packed files to the terminal according to the received address. The method andthe system for the file download service enable a user to conveniently, efficiently and quickly download the files from a network hard disk in batches.

The invention specifically relates to a mixture containing fluororesin and a preparation method thereof, belonging to the field of communication materials. A prepreg prepared by impregnating a glass fabric in dispersion liquid of the mixture containing fluororesin and then carrying out drying and the like has uniform glue content, good impregnation quality, strong resin adhesion, smooth surface and appropriate toughness and viscosity. The invention also relates to a high-frequency copper clad laminate prepared from the prepreg, or a film or copper foil made of the mixture containing fluororesin. The prepared copper clad laminate has good thermal-mechanical properties, excellent dielectric properties and high copper foil strength, and can meet requirements on the comprehensive properties of substrate materials in the field of high-frequency communication. According to the invention, the processing properties of traditional fluororesin are greatly improved by using fluorine-containing resin with a low melting point; and a coupling agent is cooperatively used, so interaction between an inorganic filling material and glass fabric and a resin matrix is improved, dispersibility of the inorganic filling material, processing aids and the like in the fluororesin is enhanced, and the overall performance of the copper clad laminate is made more stable.

The invention discloses a method for preparing a graphene / MOF (metal-organic framework) porous composite material aquagel and a graphene / MOF porous composite material aerogel. The method comprises the following steps: taking a clean container, adding a graphene or graphene oxide dispersion solution into the container, adding MOFs crystal powder into the container until the mass ratio of the MOFs crystal powder to the graphene or graphene oxide is (1:100)-(100:1), sealing the container, and performing oscillation or stirring to promote the formation of a graphene or graphene oxide self-assembled three-dimensional framework structure and the uniform compounding between the MOFs crystals and graphene sheets or graphene oxide sheets, thereby obtaining the graphene / MOF porous composite material aquagel; and finally, performing freeze-drying to obtain the graphene / MOF porous composite material aerogel. The graphene / MOF porous composite material aerogel has a self-supporting porous structure, and maintains the structural integrity of the graphene or graphene oxide and MOFs. The preparation method is mild in conditions and simple to operate, and can effectively prevent the graphene sheets or graphene oxide sheets and the MOFs crystals from aggregation.

The invention belongs to the technical field of membranes, and particularly relates to a beta-cyclodextrin modified mesoporous silica ball-polymer hybrid proton exchange membrane and a preparation method thereof. The method comprises the following steps: firstly preparing a beta-cyclodextrin modified mesoporous silica ball with a spherical shell structure; and blending the beta-cyclodextrin modified mesoporous silica ball with a polymer, so as to prepare the proton exchange membrane. According to the proton exchange membrane prepared by the method, organic-inorganic composite particles (beta-cyclodextrin modified mesoporous silica balls) are introduced, the colorless transparent character of the proton exchange membrane is not changed; the proton conductivity of the beta-cyclodextrin modified mesoporous silica ball-polymer hybrid proton exchange membrane is greatly increased in comparison with a pure polymer proton exchange membrane; especially the proton conductivity in high-temperature and / or low-humidity environments is improved exponentially or even by one order of magnitude; and meanwhile, the method disclosed by the invention is mild in preparation condition, low in production cost and easy in large-batch and large-scale production, and has a good industrial production foundation and wide application prospect.

The invention relates to a high-heat-conductivity fluorine-containing resin based prepreg and a copper-clad plate prepared with the same. By introduction of a coupling agent modified inorganic nano supporting material into high-heat-conductivity inorganic filler, compatibility of the high-heat-conductivity inorganic filler to a fluorine-containing resin matrix is improved, and gathering of the high-heat-conductivity inorganic filler in a resin matrix is inhibited while heat conductivity of fluorine-containing resin is increased. The prepreg prepared by steps of impregnating glass fibers in dispersion liquid of the fluorine-containing resin mixture, drying and the like is high in heat conductivity, uniform in resin content, high in impregnation quality, high in resin adhesion, high in surface smoothness and appropriate in toughness and viscosity. The copper-clad plate prepared with the high-heat-conductivity fluorine-containing resin based prepreg is high in transverse heat conductivity, excellent in heat and mechanical property and dielectric property and high in copper foil peel strength and weather resistance, meets the requirement of high-power devices on quick transverse heat dissipation and accords with requirements on various comprehensive performances of substrate materials in the field of high-frequency communication.

The invention provides a method for preparing a polymer micro lens array, and relates to the field of micro mechanical machining. The problems that in an existing hot press molding method, the cycle is long, cost is high, efficiency is low, and the dimensional precision and the shape of micro lenses can not be guaranteed easily are solved. The method comprises the steps that a graphical photoresist mask is formed on the surface of a silicon substrate; a microporous array is etched through a dry method; the microporous array is evenly covered with a dimethyl silicone polymer thin film, the microporous array is in sealing connection with a cavity, the pressure of a cavity is adjusted to change the ball coronary deformation of the dimethyl silicone polymer thin film, and the pressure is kept constant; photosensitive gel is poured on the dimethyl silicone polymer thin film, and a photosensitive gel convex mold is obtained through ultraviolet curing demolding; a mixture of dimethyl silicone polymer prepolymer and a curing agent is poured in the photosensitive gel convex mold to be heated and cured to obtain a dimethyl silicone polymer concave mold; the concave mold is used for conducting hot pressing on carbonic ester base materials, and a carbonic ester base micro lens array is obtained after demolding. The method for preparing the polymer micro lens array is easy to operate, high in efficiency, low in cost, small in error, good in repeatability, lossless in demolding and suitable for mass production.

The invention belongs to the field of communication materials, and particularly relates to a fluorine-containing resin-based copper-clad plate with a high dielectric constant and a preparation methodof the plate. According to the plate, surfaces of inorganic fillers are collectively modified by coupling agents and parts of fluorine-containing polymers, so that interaction force among the inorganic fillers and fluorine-containing resin substrates are higher, the loading amount of the inorganic fillers in the fluorine-containing resin substrates is high (>=50wt%), the compatibility among the inorganic fillers and the substrates is good, the bonding power among the inorganic fillers and the substrates is high, dispersion performances among the inorganic fillers and the substrates are better,so that a prepared fluorine-containing resin-based dielectric slice is uniform and good in dielectric property, the dielectric constant is larger than or equal to 5.0, and dielectric loss is only smaller than or equal to 0.002. The fluorine-containing resin-based copper-clad plate has a certain mechanical strength, excellent heat stability and high copper foil peel strength and can meet various performance requirements for diversified and complicated functions of the copper-clad plates and high-density and multilayer circuit arrangement and the like in the field of high-frequency and high-speed communication.

The invention belongs to the technical field of membranes, and in particular relates to a sulfonate functionalized metal-organic framework and graphene oxide compound modified polymer hybrid proton exchange membrane and a preparation method thereof. According to the invention, a compound(MOF-SO3H@GO) of the sulfonate functionalized metal-organic framework(MOF-SO3H) and graphene oxide(GO) is prepared first and then doped into a polymer to obtain the sulfonate functionalized metal-organic framework and graphene oxide compound particles hybridized polymer hybrid proton exchange membrane. The proton exchange membrane has excellent proton conductivity under a high dampness condition, and simultaneously improves the fuel obstructive capability of the hybrid proton exchange membrane. Therefore, the (MOF-SO3H@GO) modified polymer hybrid proton exchange membrane has more superior selectivity. The method has a simple operational process, mild preparation conditions, relatively low production cost, convenience for batch and large-scale production, good industrial production basis and wide application prospects.

The invention discloses a preparation method for a metal-doped lithium / carbon manganese phosphate (LiMXMn1-XPO4 / C) composite from manganese phosphate. The method comprises the following steps: preparing active manganese phosphate materials (MnPO4) with different shapes by using a precipitation or sol-gel method; then subjecting prepared manganese phosphate, a lithium source and a metal-doped elemental compound to ball milling for 20 to 50 h and mixing with alcohol used as a dispersant; carrying out vacuum drying and crushing to obtain a crushed substance; placing the crushed substance in a stainless steel container, heating the crushed substance to a temperature of 450 to 800 DEG C in a furnace protected by an inert atmosphere and maintaining the temperature for 2 to 12 h; and rapidly placing the substance to a liquid coolant under the conditions of a high temperature and air isolation and carrying out rapid cooling so as to obtain the LiMXMn1-XPO4 / C composite. The method provided by the invention has shortened process flow, can maintain particle activity in a high temperature, effectively gives rise to structural dislocation, improves the ionic migration rate and electronic conductivity of the composite and is suitable for large-scale industrial production.

The invention belongs to the technical field of membranes and particularly relates to a carbon nanotube / graphene oxide nanoribbon-polymer hybrid proton exchange membrane and a preparation method thereof. The proton exchange membrane is prepared by: preparing multi-wall carbon nanotubes into carbon nanotube / graphene oxide nanoribbon composite; blending the carbon nanotube / graphene oxide nanoribbon composite with a polymer solution. The proton exchange membrane prepared herein is introduced with one-dimensional and two-dimensional composite (carbon nanotube / graphene oxide nanoribbons) and thereby has good dispersity and has proton conductivity greatly improved as compared to that of pure-polymer proton exchange membranes and multiply improved particularly in high-temperature low-humidity environment; meanwhile, the invention is low in production cost, easy for batch large-scale production and has good industrial production basis and promising application prospect.

The invention relates to a preparation method of boron-nitrogen-co-doped carbon dots. The method includes the steps of drying corn cobs without corn kernels, putting the corn cobs on a ceramic tray, sending the tray into a tubular furnace to be sintered under the protection of inertia gas, grinding the product into a grinding material, and baking the grinding material to obtain carbon powder; secondly, mixing, stirring and drying carbon powder, boric acid and ultrapure water, putting the product into a quartz tubular furnace with ammonia gas to be sintered, taking out powder to be acidized by mixed liquid of concentrated sulfuric acid and concentrated nitric acid, then stopping the reaction through ultrapure water, conducting repeated centrifuging and ultrasonic processing, and finally conducting vacuum freezing and drying to obtain the boron-nitrogen-co-doped carbon dots. The applied raw material is a sustainable recyclable material, namely, corn cobs, and has the advantages of being easily produced in batches on a large scale; the prepared boron-nitrogen-co-doped carbon dots are uniform in particle size; nitrogen can be prepared by decomposing water through sunlight without sacrificial agent.

The invention discloses a plate antenna with polarization adjustment, which belongs to the field of satellite communication. The plate antenna with polarization adjustment comprises a polarization adjusting device connected between an antenna radiation system and a back-end RF circuit, wherein the polarization adjusting device comprises a polarization synthesizer, a waveguide tube and a depolarization device, the polarization synthesizer and the depolarization device are each provided with two paths of polarization connecting ports and a public port, the waveguide tube is connected between the public port of the polarization synthesizer and the public port of the depolarization device, and the depolarization device can rotate around an axis of the waveguide tube; the antenna radiation system comprises two paths of polarization signal transmission channels, the two paths of polarization connecting ports of the polarization synthesizer are respectively connected with the two paths of polarization signal transmission channels; and at least one of the two paths of polarization connecting ports of the depolarization device is connected with the back-end RF circuit. Through structure adjustment, the plate antenna only adopts a very few microwave passive components, achieves polarization adjustment, and expands the application range.

The invention discloses a crystal boundary diffusion method for improving the coercive force and the thermal stability of a neodymium-iron-boron magnet, and belongs to the field of rare earth permanent magnet materials. According to the method, a quaternary alloy Dy-Ni-Al-Cu with a low melting point is used as a diffusion source and melted and prepared into a rapid-hardening strip, after coarse breaking, the strip casting is laid around the neodymium-iron-boron magnet, and by the adoption of a heat treatment method, the rapid-hardening strip diffuses and enters the magnet along the crystal boundary. After the processing, the coercive force of the magnet is significantly improved, and the magnetic energy product is improved to a certain extent; meanwhile, since the temperature of the diffusion treatment is low, energy consumption can be reduced, the cost can be lowered, and Nd2Fe14B crystal grains can be prevented from growing up; compared with a coating and magnetron sputtering method, the crystal boundary diffusion method omits a powder preparing and coating process in a coating technology and a thin film preparing process in a magnetron sputtering technology. After the technology processing of the crystal boundary diffusion method, the neodymium-iron-boron magnet with the high coercive force and the high thermal stability is finally obtained.

A flexible electrostatic compensation type electrostatic moment fluid micro-gyroscopes which belongs to micro-electromechanical system domain includes a rotor, a stator, and a flexible girder, wherein the rotor is composed by a substrate and a ring cavity full of metal fluid, and the stator comprises a second substrate, a rotary drive coil, a detecting electrode, a feedback moment coil and a flexible compensation electrostatic electrode, and eight rotary drive coils, eight detecting electrodes, four feedback moment coils, eight flexible compensation electrostatic electrodes are distributed on the second substrate from inside to outside. The invention is capable of making the stator generate angular momentum using the high speed rotation of metal fluid without relative rotation between rigid structures, eliminating the influence of interference moment caused by flexible girder transmogrification by the electrostatic force moment generated by electrostatic induction between the flexible compensation electrostatic electrode and the rotor, and performing feedback control to the rotor by using the feedback moment electrostatic electrode.

The invention discloses a preparation method of a modified metal-organic framework and a composite nano-filtration membrane. The preparation method of the modified metal-organic framework includes thesteps: modifying the surface of the metal-organic framework by the aid of plant polyphenol; forming a hollow structure in the metal-organic framework to obtain the modified metal-organic framework. The preparation method of the composite nano-filtration membrane containing the modified metal-organic framework includes the steps: loading the metal-organic framework into an aromatic polymer function surface layer of a porous supporting membrane by an interfacial polymerization method in situ to obtain the composite nano-filtration membrane. The modified metal-organic framework in the compositenano-filtration membrane is effectively loaded on the membrane and interacted with a surface layer polymer through a chemical bond, water flux, hydrophilcity and pollution resistance of the compositemembrane are improved, and structure stability and chlorine resistance of the composite nano-filtration membrane can be improved. The preparation method is simple and low in production cost and has good industrial production bases and wide application prospects, and the comprehensive performance of the membrane is remarkably improved.

The invention discloses a heat preserving and oxidation resisting method in aluminum electrolysis cell production and a heat preserving covering device. The invention adopts a movable and monoblock heat preserving covering device formed by connection of steel member plates and heat preserving refractory material blocks to cover each positive electrode of an aluminum electrolysis cell and the ends as well as the lateral parts of the aluminum electrolysis cell, so that the effective heat preservation of the aluminum electrolysis cell can be realized and positive electrode surface oxidation of the aluminum electrolysis cell can be prevented. In the invention, the mode of employment of a mixed covering material layer composed of alumina and an electrolyte in the prior art is completely discarded. Compared with the prior art, the heat preserving covering device of the invention not only has the advantages of convenient operation, low running cost, labor saving, time saving, and high working efficiency, but also has the advantages of simple structure, good and stable heat preserving and oxidation resisting effects, resource saving, low requirements for the experience and technical level of operators, as well as convenience for mass production and standardized production, etc.

The invention discloses a human STRtyper PCR enlarged fluoroscopic examination reagent kit with quick speed detecting, accuracy, good repeatability, good versatility, low price and practicality. The applicability of the reagent kit for Chinese is remarkable in particular. The serial products of the invention comprise the three following kits: (1) a STRtyper-20G kit with the largest STR gene locus of the global and most powerful recognizing ability; (2) a STRtyper-16GC kit which is more suitably used to build a criminal DNA database of Chinese population and identify the identity; (3) a STRtyper-10F / G kit with brand new STR gene locus. Each kit product comprises the component of 1.1 ml * 1 tube of STR PCR reaction mixture; 0.55 ml * 1 tube of STRtyper primer mixture; 120 microlitre * 1 tube of HS-Taq DNA polymerase; 0.3ml * 1 tube of STR control DNA; 50 microlitre * 1 tube of STRtyper allelomerphic gene mixture; 0.5 ml * 1 tube of internal standard; 30 microlitre* 1 tube of 310 spectrum correcting standard; 30 microlitre * 1 tube of 3100 spectrum correcting standard.

The invention discloses an immersed type ultrasonic surface treatment method for a polymer 3D printed product and relates to a surface treatment technology based on an ultrasonic cavitation effect. The surface quality of the printed product is improved. The immersed type ultrasonic surface treatment method for the polymer 3D printed product is characterized in that the roughness treatment of the surface of the product is carried out on the basis of the ultrasonic cavitation principle. The method includes the steps that an ultrasonic grinding device is designed and manufactured and grinding liquid is prepared. The grinding liquid (5) is added in a grinding pond (1), and heating is performed. The 3D printed product (3) is clamped through a support (6), and the position is adjusted. The product is immersed in the grinding liquid, an ultrasonic generation module (2) is started, shock waves generated by blasting of ultrasonic cavitation bubbles are used for driving abrasive materials in the grinding liquid to perform physical impact on the surface of the product, and the surface of the product can be machined. The immersed type ultrasonic surface treatment method for the polymer 3D printed product has the beneficial effects that the requirements for the size and the shape of the product are low, the material applicability is wide, material fusion is avoided because of low-temperature processing, energy consumption is low, and the method is suitable for machining complicated hook faces and the like.

The invention belongs to the technical field of preparation of continuous fiber reinforced ceramic based composite materials, and particularly discloses a preparation method of a low-cost and high-efficiency aluminum oxide fiber reinforced aluminum oxide composite material. The method comprises the following specific steps: firstly, preparing a stable aluminum oxide slurry, then brushing the aluminum oxide slurry on degummed aluminum oxide fiber cloth, molding after mould pressing, drying to obtain an aluminum oxide fiber reinforced aluminum oxide composite material rough blank, and finally, sintering to obtain the aluminum oxide fiber reinforced aluminum oxide composite material. The preparation method provided by the invention has the characteristics of simple process and short preparation period, and the prepared aluminum oxide fiber reinforced aluminum oxide composite material has excellent high-temperature mechanical properties and thermal stability.

The invention discloses a processing technology of chilli oil bamboo shoot and relates to a food processing technology, wherein the processing technology comprises the following steps: processing raw materials, bleaching, preparing ingredients and spicing, wherein the step of preparing ingredients comprises preparation of the chilli oil ingredients and brine. Another pot is selected after the spicing, the chilli oil ingredients of appropriate amount is poured into the pot, the spiced bamboo shoots are into the pot, and the mixture is fried for 5 to 10 minutes to obtain the finish product. The processing technology of chilli oil bamboo shoots has a uniform salt deduction effect, can save water and can make uniform salinity. The formula is regulated based on a lot of experiments and according to tastes, is beneficial to process and mass production, ensures a stable and uniform taste, has a relatively popular taste, is adaptable to consumer demands and has good practicability.

The invention discloses a processing technology of bamboo shoots with pickled peppers, and relates to a food processing technology. The processing technology comprises the concrete steps of processing materials, boiling, distributing and pickling, wherein in the distributing step, mountain pepper water is prepared; and the preparation method comprises the steps of strictly putting various materials into a pot according to the ratio; and evenly stirring for 3-5 minutes to take out from the pot. According to the processing technology, the fading effect is even, and consistent in salinity control; water consumption is saved; the ratio of pickling liquid to fed materials is strictly controlled; the pickling temperature and the pickling time are controlled; the streamline operation is carried out; consistent mouthfeel of the product is ensured; the processing technology has good practicability.

The invention discloses a terahertz artificial birefringence device based on a periodic chirped grating. According to the terahertz artificial birefringence device, an artificial birefringence effect is formed through etching a submillimeter-scale relief grating structure on the surface of a high-resistance silicon chip, thereby realizing functions of terahertz wave phase shift and polarization state transition. According to the device, a specific period chirped structure is adopted. Not only is periodicity of the grating kept, but also the chirped structure is introduced. Compared with a common periodic grating, the terahertz artificial birefringence device is advantageous in that the birefringence coefficient and the birefringence bandwidth of the device are improved; a high birefringence coefficient which is larger than 0.35, broadband birefringence flatness and a good linear phase shift characteristic are realized in a terahertz waveband; a highest phase shift coefficient reaches deltaphi=1.6pi; and polarization conversion rate exceeds 99% when the terahertz artificial birefringence device is used as a one-half wave plate. Compared with a metal grating and a metal hypersurface structure, the terahertz artificial birefringence device is made of a full dielectric material and greatly improves transmittance of the device; low loss and broad band are realized; and the terahertz artificial birefringence device can be widely used for regulating terahertz wave phase and polarization.

The invention discloses a mutual shielding type electric field sensor based on torsional vibration. The mutual shielding type electric field sensor comprises a substrate, an electric field sensing structure, torsional elastic beams connected with movable torsional electrodes and a driving structure, wherein the electric field sensing structure comprises at least one group of fixed electrodes and movable torsional electrodes, the fixed electrodes and the movable torsional electrodes are sensing electrodes and are mutual shielding electrodes, namely the fixed electrodes and the movable torsionalelectrodes produce relative movements and are mutually shielded when the movable torsional electrodes perform torsional vibration, and meanwhile the fixed electrodes and the movable torsional electrodes produce sensing charge change. The driving structure drives the movable torsional electrodes to perform torsional vibration around the torsional elastic beams, so that relative position change isproduced between the fixed electrodes and the movable torsional electrodes. The electric field sensor is simple in structure, small in size, high in sensing efficiency, wide in use range, suitable forcommon machining and micromachining technology preparation, easy to assemble and integrate and suitable for batched-type and large-scale production.

The invention belongs to the field of communication materials, and in particular relates to an adhesive sheet for a copper-clad laminate. The adhesive sheet with a controllable area, a smooth surface, a uniform easy-to-control thickness and suitable toughness and viscosity is prepared by mixing uniformly resin, an inorganic filler and an auxiliary agent, then hot pressing, sintering, turning, and the like. According to actual application scenes, various types of composite adhesive sheets are prepared by selecting of the suitable resin and inorganic filler, and prepregs with various polymer matrixes, different dielectric properties and different surface structures can be well composited. In particular, due to the use of glass fiber and other reinforcing materials, the dielectric properties of the adhesive sheet can be adjusted to a large extent, and the practicability and universality of the adhesive sheet can be effectively enhanced. In the invention, the adhesive sheets and the prepregs are well compatible and strong in adhesion, and a prepared multilayer board has good thermal and mechanical performances, high stability and low hygroscopicity, and can meet comprehensive performance requirements of different communication fields on the copper-clad laminate.

The invention belongs to the technical field of membranes, and discloses a polydopamine-modified hollow metal organic framework-modified polymer hybrid proton exchange membrane and preparation thereof. The preparation comprises the following steps: (1) reacting metal salt with ligand to obtain a corresponding metal organic framework MOF; (2) etching the MOF in an aqueous solution of acid to obtain a hollow metal organic framework H-MOF; (3) putting the H-MOF into a buffer solution of dopamine hydrochloride, and stirring and reacting to obtain a polydopamine modified hollow metal organic framework H-MOF-D; and (4) adding the H-MOF-D into the sulfonated polymer solution to form a membrane casting solution and a membrane material, and soaking the membrane material in hydrogen peroxide, acid and deionized water to obtain the polydopamine-modified hollow metal organic framework-modified polymer hybrid proton exchange membrane. By improving the structure and composition of key functional components in the proton exchange membrane, the obtained proton exchange membrane has excellent proton conductivity under high and low humidity conditions.

The invention belongs to the technical field of membranes, and particularly relates to a SiO2@sPS-modified polymer hybrid proton exchange membrane and a preparation method thereof. The proton conductivity of the SiO2@sPS-modified polymer hybrid proton exchange membrane prepared by uniformly dispersing SiO2@sPS in a polymer matrix is greatly higher than that of the pore polymer proton exchange membrane. Besides, the silicon sphere kernel is etched to obtain the sulfonated hollow polystyrene (h-sPS) / polymer hybrid proton exchange membrane to further enhance the water retaining capacity of the hybrid proton exchange membrane, so that the proton conductivity of the h-sPS / polymer hybrid proton exchange membrane is further enhanced; and meanwhile, the fuel permeability of the hybrid proton exchange membrane is further inhibited. Therefore, the h-sPS / polymer hybrid proton exchange membrane has higher selectivity. The method has the advantages of simple operational process, mild preparation conditions and lower production cost, can easily implement mass large-scale production, and has wide application prospects.

The invention relates to a method for preparing a phosphate series lithium ion battery anode material, comprising the following steps: preparing one or more of divalent manganese source compound, ferrum source compound, nickel source compound or cobalt source compound into a mixed solution; adding oxalic acid or oxalate, acid and urea, and slowly hydrolyzing the urea by controlling the reaction temperature and time; causing the pH value of the system to rise to reach the condition of homogeneous precipitation; after the reaction, filtering, washing and drying to obtain a precursor; evenly mixing and carrying out ball milling on the precursor, a lithium source and a phosphorous source; and calcining the mixture under the non-oxidability atmosphere to prepare the unitary or multielement phosphate series lithium ion battery anode material. The precursor prepared with the method has the advantages of stable ingredient proportion, even granularity distribution, good consistency and simple synthetic technology, does not need to consider the influence of flow rate and agitation and is suitable for industrial production. The synthesized battery anode material is the phosphate compound with an olivine structure, the average grain size of the primary particle is 100-500nm, and the battery anode material has good electrochemistry property.

The invention discloses a permanent magnet synchronous linear motor with bilateral asymmetric V-shaped magnetic poles. A flat-plate-shaped secondary pole of the motor is composed of a yoke plate and bilateral magnetic poles, wherein each magnetic pole is in a V shape formed by a plurality of sections of permanent magnets, the inclination directions of V-shaped magnetic pole sections located at mirror symmetry positions are different, that is, the directions of V openings are different, a bilateral asymmetric state is formed, and the inclination angles and the side lengths of the V-shaped magnetic pole sections located at the mirror symmetry positions are equal; a primary armature is composed of an iron core and windings, wherein the current directions of the bilateral windings at mirror symmetry positions are opposite, and the primary armature and bilateral magnetic poles form a series magnetic circuit and interact to generate same-direction electromagnetic thrust. According to the invention, the asymmetric V-shaped skewed poles have multiple combination forms, so it is guaranteed that electromagnetic thrust does not drop drastically while thrust fluctuation of the motor is reduced, and good thrust characteristics are achieved.

The invention discloses a radial shear interference wavefront detection device based on a micro-optical device, comprising a polarization direction modulator (1), a polarization ring path direction shear system CRSS, a micro phase modulation array MPA and a photodetector (9 ), the micro-phase modulation array MPA is composed of a microwave chip array (7) and a polarizer (8). Using the birefringence effect of a birefringent crystal, the micro-phase modulation array is fabricated by a micro-optical processing method to realize the space phase of the radially sheared beam. The wavefront phase distribution of the beam to be measured is inverted by a random phase shift algorithm. The invention adopts an all-common optical path structure, which can be immune to environmental vibration and has a stable interferogram; the structure is compact and easy to transplant; the micro-optical device has a large scale, low precision requirements, low cost, and is convenient for mass production; it has a wide spectral range and is insensitive to chromatic aberration. The invention can be applied to the fields of adaptive optics, optical detection, thermal imaging and the like.