17results about How to "Realize multiple reuse" patented technology

The invention discloses a thyristor failure test device, which relates to the technical field of thyristor life test, and comprises a power supply, a protective resistor, an artificial neutron source, a data acquisition device and a processing module, and is characterized in that the power supply is used for providing direct current bias voltages with different sizes and different polarities for a sample thyristor; the artificial neutron source is used for enabling random single-particle burnout events to occur in the sample thyristor; the protection resistor is used for limiting main loop current; the data acquisition equipment is used for acquiring bias voltage signals on the sample thyristors in real time; and the processing module is used for recording the occurrence time of the single-particle burnout event according to the bias voltage signal on the sample thyristor when the single-particle burnout event occurs in the sample thyristor, and fitting the occurrence time of the single-particle burnout event and the corresponding bias voltage signal to obtain the failure rate of the thyristor. According to the invention, the condition of irradiation failure of the thyristor under voltage bias under the actual working condition can be truly reflected.

The invention discloses a method for synthesizing D-psicose through multi-enzyme co-immobilization cascade combination, and belongs to the field of enzyme engineering. According to the method provided by the invention, D-psicose-3-epimerase, L-rhamnokinase, polyphosphate kinase and prepared nitrilotriacetic acid modified magnetic nanoparticles are mixed and incubated to obtain the co-immobilized enzyme. According to the efficient co-immobilized enzyme provided by the invention, the stability is improved, the efficient co-immobilized enzyme is easily separated from an enzymolysis system, the repeated utilization of the immobilized enzyme can be realized, and the production cost is reduced. When the co-immobilized enzyme is applied to preparation of D-psicose, the raw material cost of an enzyme preparation is greatly reduced, and the co-immobilized enzyme has relatively high industrial application value.

The utility model relates to a steel rail insulation base plate for railway line transverse lifting beam construction. The steel rail insulation base plate comprises an insulation base plate body (1), the insulating base plate body (1) comprises a bottom surface supporting structure (11) and an edge limiting structure (12); the insulating base plate body (1) comprises a bottom surface supporting structure (11) and an edge limiting structure (12); the edge limiting structure (12) is arranged on at least one side of the bottom surface supporting structure (11); a positioning structure (1a) connected with the edge of the bottom of the steel rail is formed between the edge limiting structure (12) and the bottom face supporting structure (11) and used for limiting the steel rail insulation base plate to the bottom of the steel rail. When the steel rail insulation base plate is used, the lower portion of the steel rail can be effectively surrounded, and sealing faults caused by line reinforcing transverse lifting beam construction are greatly reduced; a safety guarantee is added for line reinforcement construction, and hidden dangers in the driving process are effectively eliminated.

The invention discloses a preparation method of super-hydrophobic / super-oleophylic nano TiO2 cotton cloth capable of being used for oil-water separation, and belongs to the technical field of oil-water separation, and the preparation method is specifically implemented according to the following steps: step 1, activating the cotton cloth; step 2, putting the activated cotton cloth into TiO2 sol for dipping treatment, and then performing centrifugal spin-drying and drying to obtain TiO2 gel coated cotton cloth; step 3, carrying out air plasma or oxygen plasma treatment on the TiO2 gel coated cotton cloth, and cooling to room temperature to obtain the super-hydrophilic TiO2 coated cotton cloth; and step 4, adding a low surface energy modifier into the TiO2 Nps hydrothermal precursor reaction solution to obtain a hydrothermal reaction solution, and immersing the super-hydrophilic TiO2 (at) cotton cloth into the hydrothermal reaction solution for hydrothermal reaction to obtain the super-hydrophobic / super-oleophylic TiO2 Nps / TiO2 (at) cotton cloth. The cotton cloth surface functional layer prepared by the method is good in durability and high in separation efficiency.

The utility model relates to ultrasonic cutter technical field especially relates to a kind of ultrasonic wave disc cutter for processing honeycomb core material, including disc cutter body, the disc cutter body includes installation end and blade part, the installation end of the disc cutter body is optical axis structure, is installed on ultrasonic wave cutter handle by SK type structure or ER type structure or heat shrink clamping structure or other forms of jacket, the installation end of the disc cutter body adjustable, the installation end of the disc cutter body is reduced setting, the installation end diameter of the disc cutter body is not greater than the diameter of the convex portion of traditional disc cutter third, the blade part of the disc cutter body is equipped with abrasive structure, the abrasive structure includes the blade edge plane of 2mm axial length. This ultrasonic wave disc cutter not only can effectively protect workpiece, improve processing quality, and improve processing adaptability and range, ensure high-precision machining, also prolongs tool life, reduces use cost.

The utility model relates to medical equipment technical field, specifically disclose a detachable infusion regulator, including can combine and separate first side combination shell and second side combination shell, still include: connecting structure, set up one contact's edge portion of first side combination shell and second side combination shell, first side combination shell and second side combination shell can rotate around the edge portion and realize the opening and closing action, guide structure, fixedly arranged on the inner wall surface among first side combination shell and / or second side combination shell, all -round has promoted the practicality and reliability of infusion regulator, effectively solved the operation of traditional infusion regulator possibly existing, the problem such as inaccuracy of adjustment and stability deficiency, provided high -efficient, safe infusion operation tool for medical staff, greatly optimized infusion process, has important significance in medical practice.

The invention provides an ion exchange fiber for hydrogen sulfide removal and a preparation method and application thereof, the ion exchange fiber has the characteristics of low cost, good adsorption performance and long service life, can remove H2S in gas and liquid, and is wide in application range; meanwhile, by controlling the regeneration conditions of the ion exchange fibers, the ion exchange fibers can be repeatedly utilized for multiple times. The preparation method is simple in preparation process, easy to operate, good in repeatability and suitable for large-scale industrial application.

The invention discloses a method for preparing immobilized lipase, and relates to the technical field of biochemical engineering and biology. The immobilization method comprises the following steps: firstly, fully mixing a chitosan solution and a modified polyvinyl alcohol solution to form gel; then, solidifying the gel by using a sodium tripolyphosphate solution to form an immobilized carrier of the lipase, and activating the immobilized carrier of the lipase by using a glutaraldehyde solution. And finally, soaking the activated lipase immobilization carrier in an emulsion containing a certain amount of lipase, and immobilizing the lipase. The immobilized lipase is simple and convenient to prepare, the loading rate of the lipase is improved while the activity of the lipase is ensured, and the immobilized lipase method with improved storage stability and reusability is formed.

The present invention provides a device and method for rapidly growing large-sized, high-quality cubic silicon carbide single crystals, belonging to the field of crystal growth technology. The device includes a crucible assembly, a seed crystal assembly, a heating assembly arranged outside the crucible assembly, and a heat preservation assembly located between the heating assembly and the crucible assembly; the crucible assembly includes a crucible and a pushing and rotating component arranged below the crucible for pushing and rotating the crucible; the seed crystal assembly includes a seed crystal holder and a lifting and rotating component connected by a mortise and tenon structure, and a locking component for locking the mortise and tenon structure; the lifting and rotating component is used to lift and rotate the seed crystal holder; and a fixing component for fixing a silicon carbide raw material rod is arranged around the seed crystal holder. The device provided by the present invention can effectively overcome the problems of high melt viscosity, poor fluidity, low solute transfer rate, etc., which are caused by low growth temperature and seriously limit the growth speed and quality of the crystal, and meet the process requirements for rapidly growing large-sized cubic silicon carbide single crystals.

The utility model discloses a deformable working tape stamping die for backward extrusion forming, which is characterized in that a handle accommodating cavity is arranged in the connecting end of a stamping rod, and an annular convex shoulder is arranged on the connecting end surface of the stamping rod; the punch comprises a punch handle part and a punch working part, the punch handle part is arranged on the tail end face of the punch working part, a pin hole is formed in the punch handle part, the pin hole is connected with the handle part containing cavity in a matched mode through a joint pin, an adjusting gap is formed between the pin hole and the joint pin, and an annular cavity is formed in the tail end face of the punch working part; a working belt is arranged on the periphery, close to the tail end face, of the punch working part. According to the utility model, the annular cavity at the end part of the punch is matched with the annular convex shoulder of the punch rod, so that the diameter of a working belt of the punch can be increased in the working stroke and can be reduced in the return stroke, thereby reducing the demolding force, enabling the punch to be easy to separate when being lifted, reducing the demolding procedures of the punch, realizing the repeated use of the punch, and reducing the production cost. And the production cost is reduced.

The invention discloses an atmospheric neutron shielding device, which comprises a sample thyristor 1, a protective resistor 2, a measuring resistor 3, data acquisition equipment 4, a direct current voltage source 5, an artificial neutron source 6, an aluminum alloy plate 7, a first nylon plate 8, a second nylon plate 9, a screw 10 and a shielding material layer 11, wherein the direct-current voltage source 5, the protective resistor 2, the measuring resistor 3 and the sample thyristor 1 form a main loop; the grounding end of the direct-current power supply 5 is grounded and is used for providing direct-current bias voltage with variable polarity and adjustable amplitude for the sample thyristor 1; one end of the protective resistor 2 is connected with the output end of the direct-current power supply 5, and the other end is connected with one end of the sample thyristor 1; one end of the measuring resistor 3 is connected with the low-voltage side of the sample thyristor 1, the other end of the measuring resistor 3 is grounded, and loop current is obtained by monitoring voltages at two ends of the measuring resistor 3; the sample thyristor 1 is arranged in a neutron beam channel of the artificial neutron source 6 and is protected by the shielding material layer 11.

The utility model relates to a ceramic filter plate cleaning device which comprises a cleaning tank, a shunting main pipe and a corrosion-resistant circulating pump, a cleaning agent and a plurality of supports used for supporting a ceramic filter plate are arranged in the cleaning tank, the shunting main pipe is arranged at an opening of the upper end of the cleaning tank, and a plurality of shunting branch pipes are arranged on the shunting main pipe in the length direction. The shunting branch pipes are used for being connected with inserting nozzles of ceramic filter plates, an inlet of the corrosion-resistant circulating pump is communicated with a liquid discharging pipe of the cleaning tank, an outlet of the corrosion-resistant circulating pump is communicated with an inlet of the shunting main pipe through a pipeline, the inlet of the shunting main pipe is connected with an air inlet pipe, and a control valve is arranged on the air inlet pipe. Forced circulation flow of a cleaning agent between the ceramic filter plate and the cleaning tank is realized through the corrosion-resistant circulating pump, high-pressure gas is introduced into the ceramic filter plate through the gas inlet pipe, and the ceramic filter plate is quickly cleaned, the cleaning period is shortened and the ceramic filter plate is repeatedly used for multiple times by alternately carrying out two processes of air blockage blowing and cleaning agent forced cleaning; the service life of the ceramic filter plate is prolonged.

The present invention discloses the preparation of a magnetic yolk-shell nitrogen-phosphorus-doped carbon nanocage material and its use for the detection of breve toxin. The doping of nitrogen and phosphorus elements can improve the surface defects of the material, increase the adsorption sites, and improve the adsorption performance. At the same time, the material with yolk-shell structure has a better enrichment effect than the block morphology, which may be attributed to the larger surface area and shorter diffusion path. The present invention uses ZIF-67 as a self-sacrificial template to greenly and controllably synthesize Y-N, P-CNCs with yolk-shell structure. The prepared Y-N, P-CNCs material has the advantages of unique hierarchical porous structure, high stability, strong magnetic response, high hydrophilicity, etc. The material is used as an adsorbent for magnetic solid-phase extraction and combined with HPLC-MS / MS to establish a detection method for breve toxin. The established method has a good adsorption effect, indicating that the material has good application prospects in the field of sample pretreatment.

The invention provides an audio playing method, a storage medium, equipment and a program product, and relates to the field of audio data processing, and the method comprises the steps: obtaining an audio clip playing request; determining a fragment time range of a request audio fragment contained in the audio fragment playing request and an accompaniment file to which the request audio fragment belongs; accompaniment audio head information of the accompaniment file is acquired; determining a target data range corresponding to the fragment time range from the audio data content of the accompaniment file according to the accompaniment audio head information; and obtaining data content corresponding to the target data range in the audio data content of the accompaniment file, obtaining a request audio clip, and playing the request audio clip. According to the method, only the data content required by the audio clip playing request needs to be downloaded and cached, and a complete accompaniment file does not need to be downloaded, so that the downloading waiting time consumption of a user is effectively reduced, and the speed of entering a clip playing scene is improved.

The invention provides an automatic scraping and drifting all-in-one machine device for a feeding tool, which comprises a driving mechanism placed in the feeding tool, a scraping mechanism arranged above the driving mechanism and connected with the first transmission shaft, a second transmission shaft arranged at the two ends of the driving mechanism, and a driving mechanism arranged above the scraping mechanism and connected with the second transmission shaft, and the dust removal mechanism is arranged below the driving mechanism and is connected with the second transmission shaft.

The present invention relates to the technical field of automatic lifting of equipment in water, in particular to a dynamic control device for autonomous deployment and recovery of underwater platforms. It comprises a shell, wherein the bottom of the shell is connected to the submarine equipment, and the top of the shell is provided with a multi-layer airbag unit; a pressurizing part is provided in the cavity inside the shell, and the pressurizing part is connected to the multi-layer airbag unit. It can be widely used in most cable-free submarine equipment, and can be used multiple times, reducing costs and increasing efficiency.

The invention discloses a preparation method of a high-dissipation anti-fatigue elastomer with a low-frequency damping characteristic. The high-dissipation anti-fatigue elastomer with the low-frequency damping characteristic, which has better mechanical property and can effectively filter low-frequency noise, is obtained by introducing polyvinylpyrrolidone, silicon dioxide nanoparticles and two monomers of acrylic acid and acrylic acid-2-methoxyethyl ester and uniformly mixing to carry out simple free radical copolymerization reaction. The elastomer can collect high-quality signals for a long time, and no mechanical fatigue risk exists. In an anti-fatigue test, the tearing capacity of the elastomer can reach 45008.93 J / m < 2 >, and the elastomer is not easy to damage. Under a low-frequency (25, 50 Hz) signal, the material thickness is the same, and the elastomer shows a remarkable audio filtering effect compared with metal, polyurethane, PMMA and sponge. The elastomer can prevent the influence caused by external stimulation (impact, friction and bending) in the use process, and target products with different shapes can be prepared according to different required scenes. The method is suitable for flexible electronic wearing and other fields.