278results about How to "Precise size control" patented technology

The invention belongs to the technical field of preparation of isocyanate polymerization products, and discloses a method for preparing a photosensitive polyion liquid photoelectric device through dispensing. The method comprises the following steps: firstly, preparing a photosensitive material and ionic liquid, and carrying out polymerization reaction on the photosensitive material and the ionic liquid to obtain a polyionic liquid photoelectric conversion material; and sequentially printing the first conductive layer, the polyion liquid photoelectric conversion material and the second conductive layer through a microelectronic printer to obtain the photosensitive polyion liquid photoelectric device. According to the invention, the preparation process is obviously simplified, and programmed control and batch production can be realized; and the consistency of photoelectric properties of the device is improved.

The invention discloses a composite material storage box forming mold and a manufacturing method thereof, and belongs to the technical field of composite material forming molds. An end socket connecting block, an end socket cylinder section connecting ring, a split type cylinder body assembly, a cap-shaped reinforcing rib and the like are manufactured in parallel and assembled to obtain the composite material storage box forming mold. The self-weight of the mold is greatly reduced while the outer molded surface of the combined mold is guaranteed, the mold filling and demolding processes are simplified, the end socket is left in the product after the product is formed, the strength and rigidity of the storage box are improved, and a stable connecting port can be provided.

The invention provides a continuous production method of a high-strength and high-toughness austenitic stainless steel plate with a 3D full-gradient structure, and belongs to the technical field of stainless steel plate production. According to the method, an austenitic stainless steel plate is subjected to cold rolling and cutting, the size specification and the surface quality of the austenitic stainless steel plate are controlled, and then the rolled austenitic stainless steel plate is subjected to austenitizing treatment; or the austenitic stainless steel plate is firstly subjected to hot rolling to control the size specification, then rapid cooling is conducted, and the coarse-grain single-phase austenite structure is obtained. And then, reciprocating torsional deformation is conducted on the coarse-grain single-phase austenitic stainless steel plate, on the basis that the macroscopic size specification of the coarse-grain single-phase austenitic stainless steel plate is not changed, combination of the strength and the toughness of the coarse-grain single-phase austenitic stainless steel plate is greatly improved, and finally the plate is rolled into a The size specification and the surface quality of the plate are accurately controlled by adjusting a rolling process; and meanwhile, controllable construction of a 3D full-gradient structure is achieved by regulating and controlling reciprocating torsion technological parameters, and therefore cooperation of high strength and high toughness is achieved.

The invention provides a preparation method of a Cu-based catalyst for acetalation reaction, which comprises the following steps: depositing Pt on the surface of a pretreated carbon carrier through an atomic layer deposition method, depositing a metal oxide CuOx on the surface of the metal Pt, and performing high-temperature reduction and medium-temperature oxidation treatment to obtain the Cu-based catalyst. According to the method, the size of Pt particles and the thickness of CuOx can be accurately controlled on the atomic scale. The catalyst is applied to the acetalation reaction of aldol, the size of Pt particles and the thickness of CuOx can be accurately controlled on the atomic scale in the hydrogen atmosphere, the Pt-coated CuOx core-shell structure catalyst with cuprous as the main component is obtained on the surface of the carbon carrier, and the catalyst has the catalytic performance of high acetal yield due to the stable cuprous structure. The preparation of the catalyst is simple and controllable, and the greenization of the aldol acetalation reaction process and the high efficiency of the product are realized through the catalyst.

The invention relates to the technical field of resistor manufacturing, in particular to a manufacturing process of a high-frequency and high-precision resistor device. Comprising the following steps: S1, substrate molding: molding substrate material powder into a required substrate shape through pressing or a mold, and carrying out sintering molding; s2, depositing a conductive thin film: depositing a layer of extremely thin conductive thin film on the substrate, and manufacturing resistive layers with different thicknesses by using a nickel-chromium alloy material to adapt to various resistance values; s3, photoetching and etching: generating a pattern through photoetching or laser trimming, increasing a resistance path and calibrating a resistance value to ensure that the resistance value is within a design range; s4, adjusting a resistance value; s5, surface treatment; and S6, screening and packaging. According to the method, the precision and the performance are controlled through the steps of calibrating the resistance value in the technological process, accurately controlling the resistance pattern through laser energy and accurately controlling the size of the pattern, so that the final product can meet the requirements of high frequency and high precision.

The invention discloses a preparation method of DNA nano-frame assisted monodisperse perfluorinated carbon nano-particles and application of the DNA nano-frame assisted monodisperse perfluorinated carbon nano-particles to fluorine nuclear magnetic imaging. The preparation method comprises the following steps: introducing fluorocarbon chain modification into a DNA nano-frame structure space through hybridization complementation; the preparation method comprises the following steps: dispersing perfluorocarbon PFC in a surfactant to form a dispersion solution, co-incubating the dispersion solution and a DNA nano-frame structure modified by an introduced fluorocarbon chain, and capturing PFC particles entering a space by taking the fluorocarbon chain in the DNA nano-frame structure as a seed, so that the PFC is self-assembled in the DNA nano-frame structure to form nano-particles with uniform size, namely the nano-fluorine probe is obtained. According to the method, the PFC nano-particles are prepared by utilizing the three-dimensional DNA nano-frames (DNF) with various different structures, the method has the advantages of design controllability, uniform size and the like, and the prepared fluorine probe is single and sharp in nuclear magnetic signal and has a good application prospect.

The invention discloses a double transition metal doped RuO2 acidic OER electrocatalyst and a preparation method and application thereof, relates to an OER electrocatalyst and a preparation method and application thereof, and aims to solve the technical problems of high overpotential and poor stability of the existing transition metal doped RuO2 catalyst.The catalyst is (M1) x (M2) yRuO2, M1 is Zr or Ti, and M2 is a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst or a transition metal doped RuO2 catalyst. M2 is Mo, Nb or Tc; x is equal to 0.02 to 0.1, and y is equal to 0.02 to 0.1. The preparation method comprises the following steps: adding ruthenium salt, M1 salt, M2 salt and ethanol into water, putting the obtained mixed solution into a homogeneous reactor for hydrothermal reaction, washing and drying the product, and annealing. According to the present invention, the prepared electrode is loaded on carbon paper to prepare the electrode for acidic OER electro-catalysis, has the overpotential of 224 mV under the current density of 10 mAcm <-2 >, has excellent stability within 200 h, and can be used in the field of water electrolysis hydrogen production.

The invention discloses a cutting device for manufacturing a reinforced concrete prefabricated frame, and relates to the technical field of disc type cutting machines, the cutting device comprises a disc type cutting machine body, one end of the outer surface of the disc type cutting machine body is rotatably connected with a supporting chassis, the top of the supporting chassis is fixedly provided with a gradienter, and the bottom of the supporting chassis is slidably connected with a guide rail; the two guide rails are symmetrically arranged; the slow cutting of the reinforced concrete prefabricated frame is realized by limiting the manual over-fast movement of the disc type cutting machine body, and the slow cutting is beneficial to the realization of a smoother cutting surface because the lower speed allows the blade to be more fully contacted with the material, thereby realizing more uniform cutting force distribution, and improving the cutting efficiency of the reinforced concrete prefabricated frame. The uniform force distribution reduces the tearing and crushing of materials, so that the cutting surface is neater and smoother, meanwhile, the movement speed of the disc type cutting machine body is prevented from being too high, and the cutting precision of the reinforced concrete prefabricated frame is prevented from being influenced by the deviation of the blade in the cutting process.

The embodiment of the invention relates to the technical field of polyamide material synthesis, and particularly discloses a dispersive micron-sized strip-shaped polyamide material as well as a preparation method and application thereof, and the dispersive micron-sized strip-shaped polyamide material comprises the following raw materials: polyamide plastic, a poor solvent and a proper amount of NaOH aqueous solution. According to the embodiment of the invention, by reasonably using the raw materials and adopting a reasonable preparation process, the shape and size of the polyamide material can be accurately controlled, and the polyamide material with specific shape and size distribution is obtained; the problem that polyamide particles with specific forms and size distribution are difficult to obtain in an existing polyamide production process is solved. Moreover, the preparation method provided by the embodiment of the invention is simple, effectively expands the development space of the polyamide material in some high-performance application fields, and has a wide market prospect.

The invention belongs to the technical field of micro-nano machining, and particularly relates to a preparation method of a diamond color center array based on a phase separation nano mask. The invention comprises two schemes. The scheme I comprises the following steps: pretreating a diamond raw material; depositing a hard mask layer on the surface of the diamond; coating an adhesion layer; coating a phase-separable patterned block copolymer or assembling high polymer materials such as biological macromolecules and the like; the diamond is subjected to annealing treatment; forming a nano mask by selectively etching the surface film layer; injecting nitrogen ions to form an NV color center array; removing the hard mask; and surface carbon impurities are removed through vacuum high-temperature annealing and acid pickling, and the high-quality color center array is obtained. The second scheme comprises a deposition step of simplifying a hard mask, and a phase-separable patterned high polymer material thick film is directly coated on the surface of the diamond raw material. By adopting two different technological processes, the preparation of the nano mask ion implantation color center array which is low in cost, high in mask precision and resolution, high in flux, extensible and large in area is realized.

The invention discloses a floating transportation towing physical model test system for yaw and deviation correction simulation, which comprises a tug power simulation system, the tug power simulation system comprises a floating transportation towing platform and a jet flow loading facility, and the main body structure of the floating transportation towing platform is composed of a fixed guide rail, a movable trailer and a power supply guide rail. The movable trailer is erected on the fixed guide rail and is driven by a motor, height-adjustable horizontal slideways are erected on cross beams on the front side and the rear side of the movable trailer, hooks with pulleys are arranged on the horizontal slideways, the hooks are connected with the floating transportation component model through traction cables, and the jet flow loading facility is carried on the movable trailer. A mechanical arm, a high-pressure plunger pump and a jet nozzle are arranged, and the jet nozzle and a water supply pipeline are connected to the tail end of the mechanical arm. The invention further discloses a test method adopting the test system. The device has the function of flexibly simulating the transverse loading of the tug, and can realize the complete similar simulation of the component response in the floating yaw process and the deviation correction process.

The utility model relates to the field of atmospheric particulates, in particular to an atmospheric particulate detecting and sampling device which comprises a support and a collecting device, the collecting device comprises a shell, the top and the bottom of the shell are detachably and hermetically connected with an air inlet channel and an air outlet channel respectively, and a mounting ring for erecting a net plate is horizontally arranged on the inner wall of the shell. The upper surface of the screen plate is provided with a cross-shaped cutter groove which equally divides the surface of the screen plate into four parts, the bottom of the screen plate is fixedly connected with a push-pull rod, a circular ring is arranged above the screen plate, the left side and the right side of the circular ring are symmetrically provided with guide rods, and the guide rods are connected into guide grooves in the shell in a sliding mode and can be pulled out of the guide grooves from bottom to top; a plurality of arc-shaped pressing plates capable of fixing the filter membrane on the screen plate are arranged at intervals in the circumferential direction of the inner side of the circular ring and are arranged in a staggered cross-shaped cutter groove mode, the filter membrane is convenient to detach, vibration of the filter membrane in the detaching, moving and cutting process is relieved, the filter membrane is convenient to cut, and meanwhile the size of the cut filter membrane can be accurately controlled.

The invention relates to a high-formability anodizing 6xxx aluminum alloy plate and a preparation method thereof. The aluminum material is composed of the following components in percentage by mass: 0.2-0.6% of Si; 0.6%-1.1% of Mg; 0.01% to 0.04% of Ti; according to the preparation method disclosed by the invention, by regulating and controlling semi-continuous casting, hot rolling and cold rolling processes, the grain size of the finished aluminum alloy plate is uniform and fine, the average grain size is 20-60 microns, the surface roughness of the plate strip is 0.25-0.45 microns, the glossiness is 350-420 GU, the tensile strength is 70-90 MPa, the yield strength is 30-50 MPa, the elongation is 30-45%, and the hardness HV is 25-45; and after the plate is subjected to subsequent room-temperature stamping forming, the surface quality is excellent, the defects of scratches, orange peels, cracks and the like are avoided, and the technical requirements of high-end products on appearance decoration surfaces are met.

The invention relates to hollow silicon dioxide microspheres and a preparation method thereof.The preparation method comprises the steps that an aqueous solution of a polymer, azide salt, an initiator and an organic solvent are mixed to obtain an azide-modified polymer, and the azide-modified polymer is added into a polar solvent to obtain a solution of the azide-modified polymer; mixing alkynyl-containing silane, the azido-modified polymer solution and a click chemistry catalyst, and then adding an acid catalyst or a base catalyst to carry out hydrolytic condensation reaction, so as to obtain a core-shell structure precursor of the silicon dioxide coated polymer; and carrying out roasting treatment or solvent extraction treatment on the core-shell structure precursor to obtain the hollow silicon dioxide microspheres. The preparation method provided by the invention is simple in process, relatively low in cost and relatively high in efficiency, can effectively control the particle size, the wall thickness and the density of the prepared hollow silicon dioxide microspheres, and has a wide application prospect.

The invention discloses a fuel cell gas diffusion layer capable of realizing gas-liquid separation transmission and a preparation method thereof, the gas diffusion layer comprises a main body, a plurality of through holes are vertically arranged on the main body according to a preset arrangement rule, and the through holes comprise large through holes and small through holes; the large through hole is an air inlet channel, and the small through hole is a drainage channel; the air inlet channel and the water drainage channel are arranged in a mutually separated mode. And by designing the pore size, water generated by reaction can be preferentially discharged in time through a water path, so that timely supply of fuel gas is guaranteed, separated transmission of gas and product water is ensured, and the durability and stability of the battery are improved.

The invention discloses a novel municipal road roadbed drainage system construction device and method. The construction device comprises a vehicle body, a lifting mechanism, a distance measuring mechanism, a positioning mechanism, an elevation measuring mechanism, a feeding bin, a flow control mechanism, a transmission mechanism and a blade set. The vehicle body walks along the outer edge of the groove according to a planned path. The positioning mechanism walks along the middle line of the road and moves synchronously with the vehicle body. The distance measuring mechanism is arranged on the top of the vehicle body and detects the distance between the distance measuring mechanism and the positioning mechanism so as to adjust the vehicle body advancing direction. The lifting mechanism is arranged on the side edge of the vehicle body and linearly moves in the vertical direction. A sliding plate mold is arranged at the bottom of the flow control mechanism; the elevation measuring mechanism is arranged on the sliding plate mold to detect the elevation; blade sets are arranged at the bottom of the transmission mechanism. According to the construction device, continuous sliding and lifting of the sliding plate mold and continuous pouring of concrete are achieved through sliding formwork construction, the construction period is shortened, high size precision and high surface smoothness of the concrete component are guaranteed, and the overall cost is saved.

The utility model discloses an electromechanical braking electric cylinder. An electromechanical braking electric cylinder comprises a lead screw, the lead screw is rotatably sleeved with a rotor shaft, the periphery of the rotor shaft is sleeved with a rotor, and the periphery of the rotor is sleeved with a stator; a primary sun gear is arranged at the axial front end part of the rotor shaft, the primary sun gear is in transmission connection with an output shaft through a hollow planetary reducer, an internal thread matched with the screw rod is arranged in the output shaft, and the output shaft is arranged on the screw rod in a sleeving manner and is in transmission connection with the screw rod; and a pressure sensor is arranged in the hollow planetary reducer or at the front end of the screw rod. The installation space and the torque transmission intermediate link are reduced, the torque transmission efficiency is improved, and the structure is compact.

The invention relates to the technical field of precision casting, in particular to a method for controlling the wall thickness of a wax mold of a complex hollow single crystal turbine blade and the wax mold. According to the method, ceramic cores are screened by obtaining the profile size of the sections, corresponding to the wall thickness points of the wax mold, of the ceramic cores; then, positioning bosses are matched with positioning holes, the screened ceramic mold cores are placed in a wax mold for positioning, wax is injected into the wax mold, and a blade wax mold is manufactured; detecting the wall thickness of a blade wax mold and the wall thickness of a corresponding casting, and obtaining a wall thickness change value; and finally, according to the wall thickness change value, the maximum value and the minimum value of the wall thickness of each detection point of the wax mold are obtained, so that the wall thickness of the wax mold produced subsequently is accurately controlled, the casting wall thickness out-of-tolerance caused by improper wax mold wall thickness control requirements is avoided, and the casting wall thickness qualification rate is increased. The problem that in the prior art, due to shrinkage of a ceramic core, the wall thickness of a wax mold of the single-crystal turbine working blade cannot meet the process requirement is solved.

The invention relates to the technical field of semiconductor manufacturing, in particular to a pore sample with large depth, and provides a method for observing a bottom structure by preparing the pore sample through a focused ion beam (FIB). According to the method, by means of filling special resin for ion thinning into pores, introducing an improved back-cutting technology and the like, the problems of pore structure deformation and large damage of focused ion beams to the interiors of the pores during sample preparation in the prior art are solved; the method has the technical effects that the stability of the bottom structure of the pore sample can be improved, and damage to the pore structure in the thinning process is avoided.

The invention discloses a low-abrasion mesoporous zirconia ceramic for dental restoration and a preparation method thereof, the mesoporous zirconia ceramic is composed of tetragonal phase zirconia crystal particles and has a mesoporous structure, the mesoporous size is 30-50nm, and the porosity is 0.3-20%; the preparation method mainly comprises the following steps: preparing a ceramic green body by a ceramic concentrated suspension liquid curing technology and sintering the ceramic green body. According to the mesoporous zirconia ceramic disclosed by the invention, mesopores are introduced among ceramic crystal particles, and the size and content of the mesopores are accurately regulated and controlled, so that good wear resistance of the material is ensured, and meanwhile, low abrasion of the material is realized.

The invention belongs to the technical field of ceramic heat accumulators, and relates to an RT0 combined honeycomb ceramic heat accumulator and a production process thereof. Comprising the following steps: mixing aluminum oxide powder, diatomite, expanded perlite, rare earth oxide, carbon nanofibers, kaolin, quartz sand, titanium dioxide, boron nitride powder, silicon carbide powder, zirconium oxide powder, aluminum oxide fibers, glass powder, yttrium-stabilized zirconium oxide, aluminum oxide hollow spheres and aluminum borate whiskers; drying the mixed material, finely grinding the dried material by using a ball mill, and screening by using a screen; the sieved mixture is put into mixing equipment, 2% of plasticizer and 1% of preservative are added for mixing, and mixed pug is obtained; and standing the mixed pug to obtain a blank. The service life of the heat accumulator is prolonged, and the heat exchange efficiency of the heat accumulator is improved.

The invention relates to the technical field of concrete processing, and provides automatic filling equipment for concrete test block forming, which comprises a vibration base, a lifting filling mechanism and a filling mold, the filling mold is provided with a forming cavity, and the filling mold is arranged at the top of the vibration base; the lifting filling mechanism comprises a lifting unit, a material receiving platform, a driving unit, a first scraper blade and a second scraper blade, the material receiving platform is provided with a filling opening, the material receiving platform is arranged on the lifting unit, the lifting unit ascends and descends to enable the filling opening to be close to or away from the upper end opening of the forming cavity, and the driving unit is arranged on the material receiving platform; the first scraping plate and the second scraping plate are movably arranged on the material receiving platform in parallel to the same direction, a material receiving cavity is defined by the first scraping plate, the second scraping plate and the material receiving platform, and the driving unit drives the first scraping plate to move in a reciprocating mode and selectively drives the second scraping plate to move in a reciprocating mode. By means of the technical scheme, the problems that in the prior art, concrete test block manufacturing and filling are low in efficiency, uneven in quality and high in cost are solved.

The invention discloses a copper nanosheet and a preparation method and application thereof.The method comprises the steps that a surfactant and a coordination agent are added into copper salt, the copper salt is reduced into nucleuses through a reducing agent, crystal nucleuses serve as seeds for nanocrystal growth, non-flaky crystals are etched away in the oxidation etching process of an etching agent, and the copper nanosheet is obtained; and the surface of the copper nanosheet is passivated by the surfactant and the coordination agent to protect flaky seed crystals of copper, so that the copper nanosheet is obtained. According to the method, a seed crystal screening mechanism is introduced, so that a non-sheet material can be effectively etched, a sheet structure is reserved, the seed crystal concentration is regulated and controlled while the yield of the copper nanosheets is improved, and precise regulation and control of the size are further realized.

A steel pipe threaded end prefabrication, thermal shrinkage and diameter expansion integrated process method relates to the technical field of steel pipe machining and comprises the following steps: firstly, performing thermal treatment on a to-be-machined part at one end of a steel pipe to reach a certain temperature, then fixing the steel pipe, and pushing an outer mold mounted on a mold towards the steel pipe to perform diameter shrinkage on the to-be-machined part of the steel pipe; and after hole shrinkage is completed, the die is removed, an inner die is installed on the die and pushed towards the steel pipe so that the to-be-machined part of the steel pipe can be expanded, after hole expansion is completed, the die is removed, and the steel pipe is cooled so that machining can be completed. By expanding the diameter of the to-be-machined part at one end of the steel pipe, internal threads can be machined, then the to-be-machined part can be in direct threaded connection with the end, provided with external threads, of the steel pipe, and compared with a traditional steel pipe connected through connecting pieces such as a hoop or a flange plate, the sealing performance, the connecting strength and the mounting efficiency can be improved; and is more suitable for deep wells, oil wells and other occasions.

The invention provides a method for promoting growth of dysprosium scandate single crystals, which comprises the following steps: preparing raw materials: uniformly mixing the raw materials, and putting into a crucible; setting growth conditions: putting the crucible filled with the raw materials into a high-temperature furnace, and setting temperature gradient, pressure and growth speed; growing by a lifting method: in the growth process, slowly lifting the seed crystal from the molten raw material at a constant speed through a lifting device, and controlling the cooling rate of the crystal to promote the growth of the single crystal; real-time weighing monitoring: in the upward lifting process, carrying out real-time weighing monitoring on the growing single crystal by using a high-precision weighing device, and adjusting growth parameters to maintain the stability and uniformity of the quality of the single crystal; compared with the prior art, the method has the following beneficial effects that by controlling the growth speed and the temperature gradient, defects and internal stress caused by thermal stress in the crystal growth process can be effectively reduced, and the integrity and the mechanical strength of the crystal are improved.

The invention discloses an electrical stimulation therapeutic apparatus for ear vagus nerves, which comprises a USB power supply, a battery management module, an LDO voltage reduction and stabilization module, an MCU module, a Boost module, two stimulation current driving modules, an ear electrode and an ear electrode detection module, and is characterized in that the power supply management module is composed of a TP4056 chip, an external element, a power supply input USB Type-C interface and a battery connection interface; the external element is used for setting charging current, filtering and other functions, the power supply input interface can be connected with a USB power supply, the USB power supply is a lithium ion battery, and the battery connection interface is connected with the lithium ion battery. The therapeutic apparatus has flexible stimulation parameter adjusting functions including stimulation intensity, stimulation frequency, current direction, pulse width and the like so as to adapt to different diseases, different disease severity degrees and tolerance and reactivity differences of different individuals to stimulation, and accurate personalized treatment is achieved.

The utility model relates to the technical field of wind power shafts, in particular to a wind power shaft die forging prefabricated blank tool. According to the technical scheme, the wind power shaft die forging prefabricated blank tool comprises a stamping part, a forging stock, a tool body and a base, the tool body is installed in the base, a forming cavity is formed in the tool body, the forging stock is placed in the forming cavity, the stamping part is erected above the tool body, a stamping head is arranged on the stamping part, and the stamping head is connected with the forging stock. The forging stock is machined into a pre-forged piece through extrusion of the stamping piece and the tool body, and a guide hole is stamped in the top end of the pre-forged piece through a stamping head. By means of in-mold prefabrication, pre-forging of shapes including the blind hole in the head and upsetting of the head during finish forging, forming can be achieved, the overall machining allowance is small, and the material utilization rate is high.

The invention discloses a preparation method of oxygen-deficient tungsten oxide WO2.72 nanospheres with photodegradation adsorption performance, which comprises the following steps: firstly, providing cations by using urea, embedding the cations into tungsten oxide to form a non-stoichiometric compound ammonium tungsten bronze (NH4) 0.33 WO3, capturing and separating out cations NH4 < + > in holes by using OH <-> radicals provided by deionized water in a mixed solution, and promoting the valence state of W to be reduced from W < 6 + > to W < 5 + >, thereby obtaining the oxygen-deficient tungsten oxide WO2.72 nanospheres with photodegradation adsorption performance. Meanwhile, in the synthesis process, the alcohol serves as a solvent, on one hand, a reaction medium needed for synthesizing the WO2.72 is provided, on the other hand, through interaction of the alcohol, the urea and the deionized water, growth and morphology of the product are controlled, the final product WO2.72 is synthesized, the WO2.72 synthesized in the mode not only solves the agglomeration problem of WO2.72 synthesized in the prior art, but also improves the yield of the WO2.72. And moreover, by accurately controlling the synthesis conditions, accurate regulation and control on the morphology and the size of the product are realized, and the adsorption and photodegradation properties of the product are improved.

This invention discloses a cultivation experimental device for studying plant ectomycorrhizal fungal interactions. It includes a base with a petri dish on it. A protective shell is installed around the petri dish on the top of the base. A circular plate is rotatably mounted inside the protective shell. Both the circular plate and the top surface of the protective shell have two symmetrical arc-shaped ventilation openings. An adjustment component connects the circular plate and the protective shell, including a splined sleeve rotatably connected to the top of the protective shell. This invention provides a cultivation experimental device for studying plant ectomycorrhizal fungal interactions that offers high adjustment precision, effortless operation, and stability. The precise design of the ventilation opening adjustment component allows for accurate control of the opening size, meeting the oxygen requirements of different fungal species and plants. Furthermore, the threaded connection of the protective shell enhances the stability and practicality of the device, providing strong support for scientific research.

The present invention discloses a superconducting strand bending strain precision measuring device, comprising a support frame, a driving mechanism installed on the upper part of the support frame, and the output end of the driving mechanism is connected to a weighing sensor and a pressure transmission module in sequence from top to bottom along the vertical direction; a bending strain module is installed on the lower part of the support frame, and when the output end of the driving module moves downward, it can apply pressure to the superconducting strand placed on the bending strain module through the pressure transmission module. In the superconducting strand bending strain precision measuring device provided by the present invention, the driving force generated by the driving mechanism applies downward pressure to the superconducting strand, and the pressure value is detected by the weighing sensor, which can accurately control the size of the pressure value and realize real-time monitoring; the bending strain module of the present invention has a novel structural design, and the overall bending strain transmission structure is simple, which reduces the transmission error caused by the complex mechanical mechanism, and greatly improves the application accuracy and measurement accuracy of the bending strain of the superconducting strand.