12results about How to "Small decline" patented technology

The invention discloses a VSG control method based on parameter self-adaption and hybrid energy storage SOC adjustment. From the perspective of improving power grid frequency fluctuation under new energy grid connection, important factors such as an action mechanism of a virtual rotor angular frequency variation and a change rate, influence of rotational inertia and a damping coefficient on VSG power frequency response output characteristics, SOC balance adjustment of hybrid energy storage and the like are comprehensively considered; according to the method, the adaptive control of VSG parameters and the coordinated control of the hybrid energy storage SOC are realized, so that the purposes of reducing the response time and overshoot of VSG power frequency output, reducing the decrease amplitude of the SOC of the energy storage system and reducing the frequency fluctuation of a power grid in a transient process are achieved. Compared with a traditional VSG control method, the dynamic response capability of the VSG can be effectively enhanced, the service life of an energy storage system is prolonged, the transient stability of a power grid is improved, and the method has important guiding significance and engineering application value for design and optimization of a VSG controller.

The invention relates to the technical field of fibers, and discloses an anti-ultraviolet moisture-absorbing fiber, a preparation method thereof and a fabric, and the anti-ultraviolet moisture-absorbing fiber is obtained by adding polyethylene glycol terephthalate and a polymer ultraviolet absorbent into a screw melt spinning machine for spinning and drawing by a drawing machine. The compatibility between the polymer ultraviolet absorbent and polyethylene glycol terephthalate is very good, adverse effects on the mechanical properties of polyester fibers are avoided after spinning, and a polymer molecular chain contains a 2-hydroxybenzophenone ultraviolet absorbing group, so that very good ultraviolet aging resistance is achieved, and the service life of the polyester fibers is prolonged. And the fiber after ultraviolet aging still has very high breaking strength and breaking elongation. The molecular side chain of the polymer ultraviolet absorbent contains a large number of carboxyl groups, so that the hydrophilicity and the moisture absorption rate of a fiber fabric can be improved by adding the polymer ultraviolet absorbent into polyester fibers, and the polymer ultraviolet absorbent shows higher moisture regain.

The invention relates to a tire curing bladder preassembling device and preassembling method, and relates to the technical field of curing bladder production, the tire curing bladder preassembling device comprises a movable frame body assembly, a conversion assembly and a dismounting assembly; a new part station for placing a new vulcanizing capsule and an old part station for placing an old vulcanizing capsule are formed on the conversion assembly, and the conversion assembly is used for exchanging the positions of the new part station and the old part station; and the dismounting assembly is used for dismounting the old vulcanizing capsule from the vulcanizing device, placing the old vulcanizing capsule on the old piece station and mounting the new vulcanizing capsule on the new piece station on the vulcanizing device. The device has the advantages that the curing bladder can be replaced without waiting for the reduction of the field environment temperature, the whole replacement process of the curing bladder is shortened, the reduction range of the tire manufacturing field environment temperature is reduced, meanwhile, when the old curing bladder is replaced, the new curing bladder is preheated in the field high-temperature environment, and the replacement efficiency is improved. The amount of steam required for increasing the temperature of a tire manufacturing site to the working temperature is reduced, and the effect of saving energy is achieved.

The utility model relates to ironing equipment technical field, and disclose a kind of efficient curtain ironing equipment, including steam generation module and hose, the gas outlet end of steam generation module is connected with hose, further include the gas guide pipe structure of being set to the one end of hose away from steam generation module, gas guide pipe structure is connected with hose, metal ball type gas outlet component is set on the gas guide pipe structure, gas guide pipe structure is connected with the bottom of metal ball type gas outlet component, gas outlet is opened on the spherical surface of metal ball type gas outlet component, gas outlet is penetrated to the inside of metal ball type gas outlet component, multiple gas outlets are evenly distributed in the top around of metal ball type gas outlet component, by metal ball type gas outlet component and the uniform hole design of surrounding, steam coverage range significantly expands, steam injection uniformity significantly improves, spherical structure is easier to operate and move, corner and wrinkle processing is more efficient, fatigue reduces and corrosion resistance improves.

The invention discloses a building joint sealing material, and relates to the technical field of building sealing materials. The sealant is made of the following raw materials in parts by weight: 100 parts of polyurethane base glue, 12-15 parts of plasticizer, 25-30 parts of filler, 8-10 parts of reinforcing auxiliary agent, 0.08-0.1 parts of catalyst, 2.8-3 parts of latent curing agent, 1-1.5 parts of water removing agent, and 1-1.5 parts of polyamide wax. By optimizing the sealant components, the finally prepared sealing material has excellent mechanical properties and bonding properties, and after 70°C heat aging, 70°C×95%RH wet heat aging and ultraviolet aging tests, the sealing material has high stability and excellent aging resistance.

The invention provides a resistance detection circuit, a dimming circuit and a vehicle. In the resistance detection circuit, the first protection resistor is connected in series with the detection resistor, so that the first protection resistor can also perform voltage division with the divider resistor under the condition that the detection resistor has a short-circuit fault, and the drop amplitude of the output voltage of the resistance detection circuit is reduced under the condition. In addition, the second protection resistor is connected in parallel between the two ends of the series branch formed by the detection resistor and the first protection resistor, so that the second protection resistor and the divider resistor can perform voltage division under the condition that the detection resistor has an open circuit fault, and the drop amplitude of the output voltage of the resistance detection circuit is reduced under the condition. In conclusion, the resistance detection circuit can reduce the decrease amplitude of the self output voltage under the condition that the self detection resistance is abnormal, so that the resistance detection circuit reduces the possibility that the output voltage of the resistance detection circuit is abnormal due to the abnormity of the self detection resistance.

The application discloses a kind of foamed metal foil for grain boundary diffusion, neodymium iron boron diffusion magnet and preparation method.The preparation method of the foamed metal foil for grain boundary diffusion of the application comprises the following steps:1) depositing a rare earth alloy film on the surface of a foamed metal foil sheet to obtain a coated foamed metal foil sheet;2) fold the coated foamed metal foil sheet obtained in step 1) in half, with the coated side facing in, and compress after folding to obtain a foamed metal foil for grain boundary diffusion.The foamed metal foil for grain boundary diffusion of the application enhances the adhesion of the rare earth alloy film, and when used for grain boundary diffusion, it increases the coercivity of the neodymium iron boron magnet while reducing the drop in remanence.

The application discloses a preparation method of whole wheat flour with controlled lipase and lipoxygenase activity, and relates to the technical field of whole wheat flour processing and storage. The method comprises the following steps: adopting DBD plasma to treat the bran of wheat grains, and then directly grinding the wheat grains to obtain the whole wheat flour. The method controls the lipase and lipoxygenase in the bran of the wheat grains, thereby stabilizing the whole wheat flour, prolonging the storage period of the whole wheat flour, and improving the nutritional quality and processing quality of the whole wheat flour. The DBD plasma treatment is performed at a power of 300-500 W for 60-180 s.

The present application relates to the technical field of water heaters, and discloses a control method of a gas water heater and the gas water heater. The gas water heater comprises a main heat exchanger, a condensing heat exchanger, a water inlet main pipe and an atomizer. The condensing heat exchanger has a water collecting cavity for collecting condensed water. The atomizer is used for atomizing the condensed water. The water inlet main pipe, the condensing heat exchanger and the main heat exchanger are sequentially communicated to form a water inlet waterway. When the real-time liquid level of the condensed water is greater than a preset liquid level threshold, the output load of the burner in the main heat exchanger is reduced. In this way, the gas water heater can reduce the generation amount of the condensed water when the condensing heat exchanger keeps working, reduce the situation that the condensed water liquid level reaches a dangerous liquid level, reduce the risk that the condensed water liquid level reaches the dangerous liquid level and triggers the shutdown of the gas water heater. Compared with stopping the work of the condensing heat exchanger to prevent the condensed water liquid level from rising, the condensing heat exchanger does not need to stop working and can continuously recover the heat in the high-temperature flue gas, so that the decline range of the thermal efficiency of the gas water heater can be reduced.

The utility model belongs to the technical field of compressors, and particularly discloses a rotation-stopping noise-reducing oil pumping device and a compressor. The rotation-stopping noise-reducing oil pumping device comprises a machine body, a crankshaft, an oil suction pipe, an oil suction pipe core and a fixing piece, the rotation-stopping noise-reducing oil pumping device is applied to a compressor, the crankshaft drives the oil suction pipe to rotate so as to drive refrigerating machine oil in an oil pool to rotate, the oil suction pipe core is connected with a machine body through the fixing piece and does not rotate, the rotation-stopping blade at the lower end of the oil suction pipe core stops the refrigerating machine oil from rotating, and the rotating speed of the refrigerating machine oil is reduced; the flowing noise of refrigerating machine oil is reduced; the rotation stopping blades stop rotation of refrigerating machine oil so as to reduce centrifugal force, the descending amplitude of the oil liquid level in the center of the oil pool is reduced, and therefore on the premise that the oil injection amount is reduced, the enough oil liquid level height can still be kept, and the product cost is reduced. Meanwhile, due to the low oil level, the situation that refrigerating machine oil splashes to the rotor and the stator of the motor is reduced, and impact noise is lowered.

The invention discloses a hydrophobic anti-sintering indium oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of carbon dioxide hydrogenation catalysts. The hydrophobic anti-sintering indium oxide catalyst provided by the invention comprises an indium oxide catalyst carrier and a silane layer bonded on the surface of the indium oxide catalyst carrier, wherein the silane layer is formed by reacting a silane compound with hydroxyl on the surface of the indium oxide catalyst; based on the total mass of the hydrophobic anti-sintering indium oxide catalyst, the mass fraction of a silicon element in silane is 0.5-0.9 wt%. The silane is chemically bonded on the surface of the indium oxide carrier, so that sintering and grain growth of indium oxide nanoparticles under a high-temperature reaction condition are remarkably inhibited on the premise of not changing an active crystal phase of the indium oxide carrier, and the adaptability of the catalyst under a harsh working condition of a water-containing product is remarkably improved.

The invention discloses a trabectedin-loaded nano-micelle and oxaliplatin-loaded drug combination composition and application, and relates to the technical field of delivery and drug combination, and the trabectedin-loaded nano-micelle and oxaliplatin-loaded drug combination composition comprises trabectedin-loaded nano-micelle and oxaliplatin. The invention also discloses an application of the combined pharmaceutical composition in preparation of antitumor drugs. According to the invention, a pH-sensitive amphiphilic biodegradable material (such as PCL-PEOz) and a chemical drug are self-assembled to form stable micelles, so that the bioavailability of the drug is improved, the critical concentration of the micelles is reduced, and long-acting circulation in vivo is realized; the system can be combined with oxaliplatin for use, so that the sensitivity of tumor cells to oxaliplatin is promoted, the synergistic effect of chemotherapy and immunotherapy is exerted, the treatment effect of malignant tumors is improved, and the tumor microenvironment is improved.