48results about How to "Pass effectively" patented technology

The invention discloses a centrifugal gas-electric spinning device by utilizing a negative-pressure array. The centrifugal gas-electric spinning device comprises a high-voltage alternating-current generator, an air supply device, a box body, a centrifugal sprayer, a centrifugal driving mechanism and negative-pressure receiving devices. The interior of the centrifugal sprayer is provided with a liquid storage cavity. Filament outlet holes are arranged in the centrifugal sprayer. Each negative-pressure receiving device comprises a collector, a negative-pressure pipe and a negative air-pressure generator. Negative-pressure pipe openings are formed by negative-pressure pipes in the bottom of the box body. Collectors are nested into the negative-pressure pipe openings. The multiple negative-pressure receiving devices are arrayed in an annular array with the centrifugal sprayer as the center. The high-voltage alternating-current generator is formed for generating an electric field. Airflow spraying out of the filament outlet holes is formed by the air supply device. The centrifugal gas-electric spinning device by utilizing the negative-pressure array has following beneficial effects: nanofibers are formed by sprayed polymers under airflow, an electric field, negative pressure and centrifugal force such that a three-dimensional structure is formed by nanofibers on the negative-pressure receiving devices; thickness of fiber disposition is increased; biological materials are better compatible and the application scope of technology materials is broad; and a support structure obtained is beneficial for cell growth of tissue engineering.

The invention discloses a preparation method and device for a three-dimensional support for spinning by utilizing gas-electro spinning based on negative-pressure collection. A device comprises an alternating-current high-voltage generator, a liquid supply device, a gas liquid device, a coaxial sprayer and a negative-pressure collecting device. The coaxial sprayer is provided with a liquid outlet and a gas outlet. The gas supply device is used for conveying a spinning solution or melts to the coaxial sprayer and enabling melts to flow out of the liquid outlet. The gas liquid device can generate air flow blowing from the liquid outlet to the negative-pressure collecting device via the liquid outlet. The alternating-current high-voltage generator can form an alternating electric field between the coaxial sprayer and the negative-pressure collecting device. The negative-pressure collecting device comprises a collector, a negative-pressure pipe and a negative-pressure generator. The spinning solution or melts form solution jet flow or melt jet flow in the coaxial sprayer and the collector under effect of airflow and the alternating electric field.The preparation method and device for the three-dimensional support for spinning by utilizing gas-electro spinning based on negative-pressure collection have following beneficial effects: by adoption of spinning technology based on the negative-pressure collector, the nanofiber three-dimensional support featuring a broad range of preparation material, small fiber diameters, uniformly-distributed filament diameters, a loose structure, great thickness and superior mechanical properties is obtained and has great technological universality.

The invention belongs to the technical field of fruit processing, and particularly discloses a fruit cleaning device. The fruit cleaning device comprises a machine frame and a cleaning mechanism, wherein the cleaning mechanism comprises an outer cylinder and an inner roller; a plurality of vertical rods and a plurality of horizontal rods are arranged on the side wall of the inner roller; magnets are respectively arranged on the outer cylinder and the vertical rods; a plurality of brushes are respectively arranged on each of the vertical rods; a rotating shaft is connected to a driving mechanism; a transmission shaft is connected to the bottom of the rotating shaft through a universal joint; a push rod is in threaded connection to the rotating shaft; a guide rail is connected to the push rod; a telescopic rod is arranged at the bottom of the guide rail; press blocks are symmetrically arranged at two ends of the push rod; an annular door is arranged at the bottom of the outer cylinder; ablind hole is formed in the bottom of the outer cylinder; a tapped block is connected to the blind hole through a spring; a groove is formed in the annular door; a lug is arranged at the bottom of the transmission shaft; a discharging mechanism is arranged just below the cleaning mechanism; a feeding opening is formed in the top of a discharging cavity of the discharging mechanism; a mesh screenis arranged at the middle part of the discharging cavity; and a water collecting tank is connected to the bottom of the discharging cavity. Through adoption of the technical scheme of the fruit cleaning device disclosed by the invention, the problems of being poor in fruit cleaning effect, low in efficiency and not suitable for batch production are solved.

The invention discloses an electrospinning apparatus comprising an AC high-voltage generator, a liquid supplying device including a micro-injection pump, an air supplying device, a spraying head including a liquid supplying channel connected with the liquid supplying device and an annular air supplying channel connected with the air supplying device, and a receiver including at least two rod-like supporting arms, a rotating shaft and a transmission device driving the rotating shaft to rotate. The air supplying channel sleeves the liquid supplying channel; an end part of an outlet section of the liquid supplying channel is provided with a tapered tipped end; the spraying head is connected with the AC high-voltage generator; one end of the supporting arm is fixedly connected with the rotating shaft and the other end is suspended in the air; the adjacent supporting arms are arranged at intervals; all the supporting arms form a bowl type revolving surface during the rotation of the rotating shaft; and the bowl typerevolving surface is opposite to a liquid outlet and an air outlet of the spraying head. Fibers with tiny diameters can be formed by the use of the electrospinning apparatus; the fiber filament diameters are evenly distributed and the fibers have fluffy structure and excellent mechanical properties; backswinging air flows can be avoided; and the electrospinning apparatus can be widely applied to organization engineering field.

The invention relates to the field of kudzu processing, in particular to a kudzu section drying device. The kudzu section drying device comprises an outer casing, a bin, a heating pipeline and a circulating air pipe. The kudzu section drying device is characterized in that the external wall of the heating pipeline is arranged on the internal wall of the outer casing through a thermal insulating layer; the lateral side of the outer casing is provided with a feeding sealing door and a discharging sealing door; the bin is in a cylindrical shape; the bin is connected to two ends of the heating pipeline through a rotary shaft; a travelling wheel is arranged between the bin and the rotary shaft; the travelling wheel is driven by a stepping motor; the circulating air pipe comprises an air outlet end and an air inlet end; two ends of the circulating air pipe are respectively connected to two ends of the outer casing; a condenser, a steam-water separator and a fan are in series connection to the circulating air pipe. The kudzu section drying device has the advantage of effectively solving the problem that a kudzu section is easy to gelatinize caused by high-temperature drying originally due to three-section drying.

The gaseous chromatographic packed column carrier features the total volume of pores in 50-10000 nm size being 0.76-0.95 mL / g and 78-98 % that of pores in 6-10000 nm size, the probable pore size of 800-1700 nm and specific pore surface area of 1-25 sq m / g. The carrier is prepared with natural diatomite and through cooling, crushing, sieving, washing and drying. When the carrier is used in gaseous chromatographic packed column, the problem of adsorbing high-carbon alkanes may be solved.

The invention discloses rumen bypass protection melatonin and a preparation method thereof, which belong to the technical field of nutrient substances of ruminants. The product is prepared by adoptingone of the following three methods: a method I comprises the steps of taking melatonin, preparing the melatonin into pellets, and drying the pellets to obtain dried melatonin pellets; carrying out fluidization again to obtain fluidized pellets; taking saturated fatty acid and salt thereof and / or an enteric slow-release packing material, melting, cooling, and coating the surface of the fluidized pellet with the molten material to obtain the rumen bypass protection melatonin; a second method comprises the following steps: taking saturated fatty acid and salt thereof and / or an enteric slow-release packing material, melting, and spraying onto the surface of melatonin to obtain rumen bypass protection melatonin; and a method 3 comprises the following steps: taking saturated fatty acid and saltthereof and / or an enteric slow-release packing material, melting, mixing with melatonin, and extruding to obtain the rumen bypass protection melatonin. The preparation method disclosed by the invention has the advantages that firstly, the melatonin can be completely coated; and secondly, the utilization degree of the ruminant to the coating layer is increased.

The invention discloses a signal acquisition system for a surface acoustic wave magnetic sensor. The signal acquisition system comprises a first oscillating circuit, a second oscillating circuit, a mixer circuit, an amplifying and shaping circuit and a single-chip microcomputer frequency measuring circuit, the first input end of the mixer circuit is connected with the first oscillating circuit, and the second input end of the mixer circuit 3 is connected with the second oscillating circuit; the amplifying and shaping circuit is connected with the signal output end IF of the frequency mixing circuit; the frequency measuring circuit is mainly connected with the signal output end of the amplifying and shaping circuit; the first oscillating circuit and the second oscillating circuit are used for outputting SAW sensor measuring frequency signals. According to the invention, a Pierce type oscillating circuit is adopted, and a SAW sensor is easy to perform self-excited oscillating to output asinusoidal signal with a specific frequency. Furthermore, the magnetic field intensity can be measured through a single difference value, namely the change of the signal frequency of a measuring branch. The precision is high, the detection range is wide, and no test blind area exists.

The invention relates to a high-entrapment efficiency long-acting nerve growth factor (NGF) liposome, belonging to the technical field of protein polypeptide drugs. The invention further discloses a preparation method of the high-entrapment efficiency long-acting nerve growth factor liposome, characterized by bonding NGF and an active membrane material of the liposome and then using a routine method and using the bonded material and other liposome components to prepare a long-circulating liposome. According to the invention, by bonding -SH, -NH2 in NGF molecules with the special active membrane material, that is, active lipid of the liposome, the entrapment efficiency is greatly increased, the internal stability is raised under the protection of long-chain PEG in the active lipid, and the key problem of the NGF application is solved.

The invention provides a micro-nanofiber material with linear groove characteristics and an orderly forming method thereof. The micro-nanofiber material is characterized by being composed of two non-compatible thermoplastic high-molecular polymers, wherein the fiber diameter is distributed between 0.1 and 30 [mu]m, and the surface of the fiber is provided with an ordered linear groove feature shape with the dimension of 1-200 nm and the arithmetic average roughness of the fiber surface between 0.1 and 0.98; the orderly forming method comprises the steps of two-component melt blending, high-speed hot gas flow drafting and net forming, ordered etching and the like, and has the advantages of short process flow and high structural characteristic (fiber diameter distribution and linear grooves)controllability; and the micro-nanofiber material with the linear groove characteristics not only has a large specific surface area fiber diameter distribution, but also has a linear groove-shaped special-shaped fiber surface rough morphology, and has great application potential in the fields of liquid rapid transmission, efficient low-resistance gas-solid separation, oil-water separation and thelike.

The invention discloses a preparation method of rumen bypass protection tryptophan particles, and belongs to the technical field of nutrient substances of ruminants. The preparation method of the rumen bypass protection tryptophan particles comprises the following steps: S1, taking tryptophan, preparing the tryptophan into pellets, and drying the pellets to obtain dried tryptophan pellets; S2, fluidizing the dried tryptophan pellets; and S3, taking saturated fatty acid and salt thereof and / or an enteric slow-release packing material, carrying out melting and cooling, and coating the surfaces of the fluidized pellets with the molten material to obtain the rumen bypass protection tryptophan particles. By adopting the preparation method disclosed by the invention, firstly, tryptophan can be completely coated, so that the finally prepared rumen bypass protection tryptophan particles can more effectively pass through rumens of ruminants; and secondly, the utilization degree of the coating layer by ruminants is increased, so that the coated tryptophan can be completely released and fully utilized by ruminants.

The invention relates to a device and method for assisting in injecting grinding liquid in the grinding wheel airflow field. A spraying nozzle for supplying grinding liquid is arranged on return flow in the airflow field in a wedge-shaped grinding zone and is tangent to the circumference of a grinding wheel; the grinding liquid spraying speed of the spraying nozzle equals the circumferential speed of the grinding wheel; and the energy obtained due to the rapid increase of the speed of the grinding wheel and the pressure and speed of the airflow field in the wedge-shaped grinding zone is used for assisting in the injection of the grinding liquid into the wedge-shaped grinding zone. In the invention, the influence of the air barrier of the grinding wheel can not be generated, and the idle work energy of a grinding liquid supplying system is saved. The spraying nozzle for supplying the grinding liquids tangent to the circumference of the grinding wheel, and the grinding liquid spraying speed of the spraying nozzle equals the circumferential speed of the grinding wheel, thus the grinding liquid can be more effectively injected into the wedge-shaped grinding zone under the drag of the grinding wheel. Because the dynamic pressure and speed of the grinding wheel airflow field increase greatly in the wedge-shaped grinding zone, more power and energy can be obtained for the grinding liquid in the wedge-shaped grinding zone. Because the negative pressure is formed behind the minimum clearance of wedge-shaped grinding zone, the flow rate of the grinding liquid flowing through the grinding wheel and a workpiece interface is increased.

The invention discloses a chemical corrosive used for manufacturing a micropore aluminum foil, belonging to the technical field of manufacturing of lithium battery anode materials. The invention aimsto solve the technical problem of providing the chemical corrosive for manufacturing the high-performance micropore aluminum foil. The scheme adopted by the invention is characterized in that the corrosive comprises the following solution of molar concentrations: 0.1-3 mol / L of Cl<-> and 0.1-3 mol / L of Fe<3+> and Cu<2+>; the corrosive further comprises the following solution of molar concentrations: 0.01-0.1 mol / L of H<+>; and the corrosive further comprises the following solution of molar concentrations: 0.01-0.1 mol / L of OH<->. The chemical corrosive can be widely applied to the technical field of micropore aluminum foil manufacturing.

For an existing spontaneous-heating patch, an adhesion layer adopts an air-tight totally-enclosed colloid base layer, it is difficult for the skin to adapt to the adhesion layer, and absorption of medicinal ingredients is completely isolated. An efficient spontaneous-heating medicinal patch comprises an air-permeable protection bottom membrane, an air-permeable protection surface membrane, a base material isolation membrane, a heating base material, medicinal materials and an oxygen isolation bag; the base material isolation membrane is arranged between the medicinal materials and the heating base material, volatilization of the medicinal ingredients can be prevented, and the medicinal ingredients of the medicinal materials can directly reach the nidi only through the skin; colloid base materials are distributed on the side, close to the medicinal materials, of the air-permeable protection bottom membrane in a point-shaped mode, the medicinal ingredients can pass through effectively, adhesive looseness caused by local heating and sweating of the skin can be prevented, and skin allergies can be effectively prevented.

The invention belongs to the field of material preparation, and particularly relates to a preparation method of a large-area molybdenum disulfide film. According to the method, a confinement space method is adopted, a magnetron sputtering method and a chemical vapor deposition method are combined, and reaction parameters are optimized to obtain a large-area MoS2 film material. The film obtained on the basis of a two-step method has the characteristics of large area, good uniformity, strong controllability, good crystallinity and the like, and the method is simple to operate, short in time consumption and capable of being produced and applied on a large scale.

The invention relates to a light-emitting electron microscopic imaging method capable of working under approximate atmospheric pressure conditions. The method is capable of effectively loading a highelectric field while maintaining high atmospheric pressure. The method is applied to a light-emitting electron microscope (PEEM) system to realize PEEM imaging under approximate atmospheric pressure conditions. PEEM imaging under approximate atmospheric pressure conditions is achieved through fractional electron-accelerated electronic optical path system and a gas pressure differential pumping system. Spatial resolution of 100 nm is achieved. A hollow conical tube added between a sample and an objective lens is both the application position of the primary voltage and the first-order differential pumping of the gas pressure. A designed atmosphere chamber has the functions of light source introduction, gas introduction / evacuation and chamber sealing, so that an approximate atmospheric pressure environment is between the top of the conical tube and a sample. In-situ and dynamic surface imaging studies of a surface nanostructure under approximate real working conditions are achieved by coupling the atmosphere chamber and a conventional PEEM imaging component.

The invention discloses a processing method for a counterbore type PCB, which relates to the technical field of electronic processing. The method comprises the following steps of: thickening copper, and thickening copper on the PCB to increase the thickness of copper foil on the PCB, drilling for the first time, drilling the PCB subjected to the copper thickening treatment by adopting a circular drill bit and processing a via hole and a positioning hole, conducting secondary drilling, adopting a conical drill bit for secondary machining, and processing a counterbore, etching, etching the frontsurface and the back surface of the drilled PCB in sequence by adopting a fractional etching method, and resistance welding: carrying out twice resistance welding screen printing on the etched PCB byadopting a Line Mask film alignment exposure method. Firstly, copper thickening treatment is carried out on a PCB, and then counterbores are formed through two times of drilling. Due to the design ofthe counterbores of the PCB, the overall assembly size of the electronic product is small, and the assembly is smoother during installation.

The present invention discloses a plugging material which has fire-proofing and water-proofing functions and can be used for conveniently removing and replacing electric cable. Said plugging material is made up by using fly ash, fire-proofing material and cement according to the mixing ratio of 6.5-7:2-2.5:0.5-1.5 through a certain preparation process. It can be extensively used in plugging engineering of power plant, transformer station, switchboard room and high-voltage and low-voltage distribution boards, etc.

The invention discloses an HJT battery with high photoelectric conversion efficiency and a preparation method thereof, and belongs to the technical field of solar cells. The HJT battery comprises an N-type crystal silicon wafer, wherein an intrinsic amorphous silicon layer, a SiO2 layer, a C-doped SiO2 layer, an amorphous silicon doped N-type layer, a TCO conductive layer and an electrode are sequentially arranged on the front surface of the N-type crystal silicon wafer; an intrinsic amorphous silicon layer, a SiO2 layer, a C-doped SiO2 layer, an amorphous silicon doped P-type layer, a TCO conductive layer and an electrode are sequentially arranged on the back surface of the N-type crystal silicon wafer; and the amorphous silicon doped P-type layer comprises a lightly doped B amorphous silicon layer and a heavily doped B amorphous silicon layer. According to the prepared heterojunction solar cell, the photoelectric conversion efficiency can be improved to 24.3% or above, the short-circuit current and the open-circuit voltage are obviously improved, and the photoelectric conversion efficiency of the silicon heterojunction solar cell can be effectively improved.

The invention discloses a graphene even harmonic frequency multiplier based on direct current bias and a design method. The graphene even harmonic frequency multiplier comprises a cavity, a signal input end, a signal output end and a graphene frequency multiplier substrate, wherein the graphene frequency multiplier substrate comprises a high-frequency medium substrate and graphene arranged on thehigh-frequency medium substrate, wherein the front end and the rear end of the graphene are respectively connected with a signal input end and a signal output end through microstrip lines, a first direct current bias circuit and a second direct current bias circuit are respectively arranged on the microstrip lines close to the signal input end and the signal output end, and a graphene frequency doubling frequency spectrum can be changed after the bias circuit is added. By adding the direct current bias, odd harmonic components can be suppressed, even harmonic components can be amplified, and thus the frequency doubling effect can be improved. The defect that in the prior art, fundamental waves and odd harmonic components generated by graphene under excitation of an electromagnetic field have a natural inhibition function on even harmonics is overcome, even frequency multiplication can be achieved, and wide application space is achieved in the field of terahertz devices and radio frequency chip design.

The invention belongs to the technical field of gyroscope signal processing and particularly discloses a differential band-pass frequency modulation MEMS gyroscope rate analysis device and method. Thedevice comprises an analog circuit part and a digital circuit part. And the analog circuit part is used for realizing analog signal acquisition of an MEMS gyroscope. And the digital circuit part comprises a digital signal frequency measurement circuit, a digital signal demodulation circuit and a digital signal filter circuit. The digital circuit part is mainly used for completing frequency measurement, demodulation, filtering and other processing of MEMS gyroscope signals. According to the invention, the rate analysis of the MEMS gyroscope is completed in the digital circuit such that a largenumber of crystal oscillator signals can be effectively prevented from being introduced into an analog circuit area, and the device is ensured to have good electromagnetic compatibility. And meanwhile, due to the characteristic that the digital circuit is not easily influenced by the environment, the gyroscope angular rate can still be accurately analyzed in an extreme environment. In addition, the signal-to-noise ratio of the device is improved.

The invention relates to a chlorine salt corrosive agent for preparing microporous aluminum foil, and particularly relates to the corrosive agent for a high-performance lithium battery positive electrode material. The chlorine salt corrosive agent overcomes the defects of an existing technology. The purpose is to provide the corrosive agent for a high-performance lithium battery positive electrodecurrent collector material. According to the technical scheme, the chlorine salt corrosive agent used for preparing the microporous aluminum foil is a salt solution, wherein the chlorine salt corrosive agent is the salt solution with negative ions only containing chloride ions, the molar concentration of Cl<-> is 0.1-3mol / L, and positive ions contain Fe<3+> and Cu<2+> with the molar concentrationof 0.1-3mol / L. The chlorine salt corrosive agent can be widely applied to the field of battery aluminum foil manufacturing.

The invention relates to the field of medicines, and particularly relates to an oral mucosa drug delivery system. The oral mucosa drug delivery system comprises a matrix and inclusion particles dispersed in the matrix, wherein the inclusion particles comprise a drug A and an inclusion material wrapping the drug A; the inclusion particles contain lipid, and the lipid accounts for 60-100wt% of the weight of the inclusion material; and the matrix optionally further contains a drug B, and the drug B is the same as or different from the drug A. The drug release of the oral mucosa drug delivery system can be more stable, side effects caused by concentration fluctuation are avoided, and the drug can be continuously released for a longer time.

The invention relates to compounds with a neuroprotective effect, and a preparation method and application thereof. Specifically, the compounds disclosed by the invention have a structure as shown in a formula I, and the definitions of all groups and substituent groups are described in the specification. The invention also discloses the preparation method of the compounds and application of the compounds in neuroprotection.

Provided are a compressor electric motor cooling structure, and a compressor and a refrigeration system having the compressor electric motor cooling structure. The compressor electric motor cooling structure comprises a housing (1), an electric motor (2) and a guide structure (4), wherein the electric motor (2) is provided inside the housing (1), the electric motor (2) is provided with a flow path (3), and the guide structure (4) is used for guiding a refrigerant to the flow path (3). The compressor electric motor cooling structure guides the refrigerant to the flow path (3) by means of the arrangement of the guide structure (4), so that the refrigerant can pass through the interior of the electric motor (2) more effectively. In combination with the flow path (3) provided in the electric motor (2), the contact area between the refrigerant and the electric motor (2) can be increased, and the cooling effect on the electric motor can be improved.

The invention provides a preparation method of a blocking support frame. The method comprises the following steps of (A) inoculating a solid substrate with a microbial strain; after fermentation, obtaining a solid substrate with a bacterial cellulose membrane on the surface, wherein the microbial strain is a strain capable of generating bacterial cellulose; (B) putting the solid substrate obtainedin the step (A) into aerosol containing nutrition solution; performing fermentation; (C) putting a metal support frame onto the surface of the solid substrate obtained in the step (B) to obtain a combined support frame; (D) putting the combined support frame into the aerosol containing nutrition solution; performing fermentation to obtain a blocking support frame. The preparation method of the blocking support frame provided by the invention can be used for preparing and obtaining the clinic support frame material with a good blocking function; growth factors can pass through the material while cells and bacteria can be blocked; good biocompatibility is realized; the blocking support frame belongs to an ideal clinic blocking support frame.

The invention discloses a simple water quality analysis detector based on the Roche water measurement principle. The detector comprises a ship body, wherein a water pumping device comprises an inner sliding groove arranged in a barrel, long sliding grooves are symmetrically arranged on the left side surface and the right side surface of the barrel, stop blocks are symmetrically and fixedly arranged on the left side surface and the right side surface of the inner sliding groove, a glass bottle is connected in the inner sliding groove in a sliding manner, and a short electric wire is arranged inthe glass bottle. The detector is firstly placed in a water area to be measured, and then a driving motor is started, so that a power shaft, a second belt wheel, a universal joint, a spiral shaft anda propeller are driven to rotate, and the ship body is driven to move forward to a point to be detected. The simple water quality analysis detector can detect the content and approximate variety of algae in water by the Roche water measuring method, so as to obtain the water quality condition in the water area to be detected, and can detect the water quality conditions of different points to be detected in the water area through a driving device at the same time; and meanwhile, the detector is provided with a solar charging sunlamp, and can detect under the condition that the weather is not good.