484results about How to "Improve playback" patented technology

The invention belongs to the field of sodium ion batteries, and particularly discloses a positive electrode material and a preparation method and application thereof. The positive electrode material is carbon nitride coated fluorine-doped pyrophosphate sodium manganese iron phosphate, the chemical formula of the positive electrode material is NaaFe3-bMnb (PO4-x) 2F4xP2O7 / C3N4, a is larger than or equal to 3.95 and smaller than or equal to 4.1, b is larger than or equal to 0.3 and smaller than or equal to 2.4, and x is larger than or equal to 0.005 and smaller than or equal to 0.05. The sodium ferromanganese pyrophosphate is subjected to fluorine doping and carbon nitride coating, so that the electronic conductivity and the structural stability of the sodium ferromanganese pyrophosphate can be improved, the capacity of the sodium ferromanganese pyrophosphate can be well exerted, and the capacity and the voltage platform of the sodium-ion battery are improved.

The invention discloses a water-retaining controlled-release fertilizer and a preparation method thereof, and relates to the technical field of controlled-release fertilizers. According to the invention, the attapulgite is modified by a phosphoric acid solution, so that the surface of the attapulgite has acidic groups, and the groups can be adsorbed with positive ions in the fertilizer, so that nutrients are adsorbed and fixed on the surface of the attapulgite, and the speed of releasing the fertilizer nutrients into a soil solution is delayed; meanwhile, the modified attapulgite and some nutritional ingredients in the fertilizer can form indissolvable compounds, so that the nutrients are slowly released along with gradual dissolution of the compounds, and the fertilizer efficiency of the fertilizer is prolonged; when the modified attapulgite encounters water, the entering speed of water can be effectively slowed down, dissolution of nutrients in fertilizer particles is controlled, and then the slow and controlled release effect is achieved; and the modified attapulgite can regulate the pH value of the soil, so that the soil environment is more suitable for plant growth and slow release of fertilizer nutrients.

The invention discloses a Sentinel-2 remote sensing image super-resolution reconstruction method based on an attention mechanism. The method comprises the following steps: 1, obtaining a Sentinel-2 remote sensing image data set; 2, carrying out the preprocessing of the Sentinel-2 remote sensing image data; 3, randomly dividing the preprocessed Sentinel-2 remote sensing image data into a training set and a test set; 4, constructing a deep learning model structure of the Sentinel-2 remote sensing image super-resolution method based on the attention mechanism; 5, training the built model by using the training set; and 6, testing the test set by using the trained model to obtain a Sentinel-2 remote sensing image super-division image. According to the method, the characteristics of the Sentinel-2 satellite image are fully utilized, and the remote sensing image fusion thought is combined, so that the quality of the super-resolution image is improved, and the accuracy and reliability of the earth surface information are enhanced.

The invention provides a positive active material and a preparation method thereof, a positive pole piece, a battery and electric equipment, the change rate d of the characteristic peak interplanar spacing of the positive active material (104) is greater than or equal to 0.05% and less than or equal to 0.5%, d = (d before-d after) / d before * 100%, d before is the interplanar spacing of the characteristic peak of the positive active material (104) measured by an X-ray diffractometer before circulation, and d after is greater than or equal to 0.05% and less than or equal to 100%. And d, measuring the interplanar spacing of the characteristic peak of the positive electrode active material (104) by an X-ray diffractometer at 45 DEG C after circulation for 80 weeks. Therefore, the interplanar spacing change rate of the positive electrode active material before and after circulation is small, which shows that the crystal structure stability of the positive electrode active material is good, the positive electrode active material is not easy to pulverize in the long-term circulation process of the battery, and the cycle performance of the battery can be improved.

The invention provides a long-acting rust converting agent for metal surfaces, and relates to the technical field of marine metal surface rust prevention and conversion, tannic acid, gallic acid and salicylic acid are matched with each other and can form a firm complex layer with formed metal oxide or metal through chelation, and the metal surface rust conversion effect is improved. The synergistic effect of the tannic acid corrosion inhibitor, the gallic acid corrosion inhibitor and the salicylic acid corrosion inhibitor enhances the exertion of the synergistic migration protection effect, a relatively compact and smooth conversion film can be formed on the rusted metal surface, the formed conversion film can effectively prevent a corrosion medium from permeating into the metal surface to make contact with the metal, and the metal corrosion inhibitor is suitable for steel structures, especially suitable for steel structure connecting parts and has good corrosion resistance and corrosion resistance. The rust remover has the advantages that the rust remover is good in permeability and high in rust conversion efficiency, harmful rust can be converted into a protective layer beneficial to corrosion prevention, effective protection is provided for a metal matrix, the corrosion prevention effect can reach 20 years or above, frequent maintenance is omitted, resources, manpower and material resources are saved, and remarkable economic benefits are achieved.

The invention relates to the technical field of topological optimization, and discloses a thermal coupling multi-scale parallel topological optimization method for additive manufacturing, and the method comprises the steps: dividing a macroscopic design domain into a plurality of macroscopic sub-design domains through a fuzzy C clustering method, and mapping the information of the macroscopic sub-design domains on the microcosmic level as the constraint condition of microcosmic optimization; performing equivalent static conversion on the transient temperature load, and introducing an equivalent thermal load into the multi-scale topological optimization model; macroscopic and microscopic thermal coupling finite element analysis is carried out according to the thermal coupling control equation, and a displacement vector matrix is solved by using an HHT-alpha method; sensitivity analysis is carried out on macro and micro objective functions and constraint conditions, and a moving asymptote MMA method is used as a solver for macro and micro design variable updating; and filling the microstructure into the macroscopic configuration to obtain an overall configuration, judging a convergence condition, and if the condition is met, outputting an optimal material distribution structure and an optimal microscopic configuration. The method can better reflect the real working state of the workpiece.

The invention discloses a treatment method of tantalum-niobium smelting wastewater, and relates to the technical field of tantalum-niobium smelting, and the treatment method specifically comprises the following steps: step 1, wastewater collection and primary treatment; step 2, physicochemical reaction and precipitation; step 3, biological treatment; and step 4, MBR membrane pool treatment. According to the treatment method of the tantalum-niobium smelting wastewater, uniform distribution of the coagulant or the precipitant in the precipitation tank can be ensured by intermittently adding the coagulant or the precipitant, and over-high or over-low local concentration caused by one-time large-amount adding is avoided, so that the coagulation effect is improved, impurities such as suspended solids, part of organic matters and sulfate in the wastewater are more effectively removed, and the treatment effect is improved. The input amount of the coagulant or the precipitator can be flexibly adjusted according to the water quality change and the treatment requirement in the sedimentation tank, so that the treatment process is more accurate and efficient; by accurately controlling the input amount of the coagulant or the precipitant, waste caused by excessive addition can be avoided, and the consumption of chemical agents is reduced.

The invention relates to the technical field of sleep data processing, in particular to a sleep improvement environment sound control auxiliary method and system. The method comprises the following steps: acquiring sleep state data; performing sleep state feature extraction according to the sleep state data to obtain sleep state feature data; performing environmental sound type selection according to the sleep state feature data to obtain environmental sound type data; according to the environment sound type data and the sleep state feature data, environment audio rate adjustment and environment volume adjustment are carried out, environment audio rate adjustment data and environment volume adjustment data are obtained respectively, and sleep improvement environment sound control auxiliary work is carried out. According to the invention, the system can better adapt to the long-term sleep mode change of the user, and can help the user gradually establish a healthier sleep habit through long-term adjustment and optimization, thereby realizing long-term improvement of the sleep mode.

The invention provides sunscreen cream as well as preparation and application thereof. According to the sunscreen cream, by specifically selecting the types and matching of the solid sunscreen agent, the liquid sunscreen agent, the liquid emollient, the oil phase thickener and the viscosity modifier and supplementing other components, the obtained sunscreen cream not only has higher SPF value and stability, but also can ensure better sensory experiences such as uniform smearing and fresh and non-sticky skin feeling, and has a good application prospect. Therefore, the sunscreen effect can be better exerted. Besides, compared with other solid sun-screening agents, liquid sun-screening agents, liquid emollients, oil-phase thickeners and viscosity modifiers, the sunscreen cream provided by the invention can simultaneously have higher SPF (specific pathogen factor) value, better stability and better sensory experience, and can better exert the sunscreen effect.

The invention relates to the technical field of sound box synchronous playing, and discloses a Bluetooth earphone and sound box synchronous playing method and system supporting stereo synthesis, and the method comprises the steps: carrying out the digital sampling of an input audio signal, and obtaining high-frequency digital audio data and low-frequency digital audio data; performing scanning and stereo function identification on peripheral equipment based on a Bluetooth 5.0 protocol to obtain a target audio equipment list; distributing a main data buffer area and a standby data buffer area; distributing the high-frequency digital audio data to Bluetooth earphone equipment for transmission, distributing the low-frequency digital audio data to sound box equipment for transmission, and when detecting that clock drift among equipment exceeds a preset target value, adjusting a reading rate of a main data buffer area for clock synchronization to obtain an equipment synchronization state; and the signal gain and the equalization parameter of the equipment are dynamically adjusted, and the target synchronous playing audio is output, so that the accurate distribution of the high-frequency data and the low-frequency data is realized, and the overall playing effect of the system is improved.

The invention discloses a polypropylene synthetic paper with a bright surface and a matte surface and a preparation method thereof, which relates to the technical field of synthetic paper preparation, and is a three-layer co-extruded synthetic paper, which comprises a bright surface layer, a substrate layer and a matte surface layer from top to bottom; the substrate layer comprises the following raw materials by weight: 80-85 parts of modified polypropylene, 10-15 parts of filler; the matte surface layer comprises the following raw materials by weight: 80-85 parts of modified polypropylene, 5-10 parts of polyethylene, 1-3 parts of flame retardant, 1-3 parts of antistatic agent, 0.5-1 parts of matte flour, 0.5-1 parts of oleic acid amide lubricant and 5-10 parts of filler. The synthesized modified polypropylene contains a hindered phenol structure, a thioether group and a pyridine ring, which improves the antioxidant and antibacterial properties of the synthetic paper. The synthesized flame retardant has a macromolecular network structure, including a DOPO structure, a melamine structure and a long chain of cardanol alkane, which improves the flame retardancy, waterproofness and environmental protection of the synthetic paper.

The invention discloses a scalp oil control composition and a preparation method and application thereof, and belongs to the technical field of daily chemical product preparation, the scalp oil control composition comprises, by mass, 20-50 parts of a component A, 0.1-5 parts of menthol, 0.05-1 part of zinc gluconate, 0.3-1 part of a preservative, 0.1-0.6 part of a pH regulator and 42.4-79.45 parts of water, the component A is obtained by mixing a compound extract of white tea, cedar and spiraea ulmus with polyhydric alcohol, performing low-temperature centrifugal separation and filtering. According to the invention, the surfactant-containing water solvent is adopted to assist ultrasonic extraction of natural functional components of plants, so that the problem of abnormal secretion of scalp grease caused by solvent residue is avoided, no extraction solvent residue is realized, and the operation is simple; meanwhile, extracts of the white tea, the cedar and the spiraea inflorescens are reasonably matched and supplement with other auxiliary components to synergistically achieve the effects of regulating scalp grease secretion, inhibiting inflammatory factors and maintaining scalp micro-ecology, so that the scalp oil control effect is achieved, and the composition can be widely applied to scalp oil control daily chemical products.

The invention discloses a device and a method for in-situ determination and reduction of greenhouse gas emission in a nitrogen and phosphorus removal process of an AOA process, and belongs to the field of sewage treatment and carbon neutralization. The device comprises a gas collection type continuous flow AOA reactor, an accurate aeration system, a gas collection system, a microelectrode system and the like. According to the device, a greenhouse gas in-situ monitoring system and a regulation and control system are integrated, the emission condition of greenhouse gases (CO2, CH4 and N2O) in the operation process of the AOA technology can be monitored in real time, then parameters such as dissolved oxygen and the sludge reflux ratio are automatically adjusted, the operation conditions are optimized, and emission of the greenhouse gases is effectively reduced. The method is also combined with a biological enhancement technology, and the ecological niche of the microbial community is adjusted by adding anaerobic ammonia oxidation filler, so that the nitrogen and phosphorus removal efficiency of the AOA process is further improved, and meanwhile, the generation of greenhouse gases is reduced. The device can comprehensively monitor the greenhouse gas in the AOA process, and provides technical support for greenhouse gas research in the biological sewage treatment process.

The invention discloses a compound traditional Chinese medicine patch for conditioning hyperplasia of mammary glands and a preparation method thereof, and relates to the technical field of traditional Chinese medicine preparations. The compound traditional Chinese medicine patch for conditioning hyperplasia of mammary glands is prepared from an iron-based metal organic framework composite drug carrying system, dopamine hydrochloride, a blank gel matrix, ethyl oleate, menthol, a solubilizer, a wetting agent and water, the iron-based metal organic framework composite drug loading system is composed of traditional Chinese medicine dihydric alcohol plastid, iron-based metal organic framework nanoparticles and cinnamomum camphora essential oil. The traditional Chinese medicine dihydric alcohol plastid and the cinnamomum camphora essential oil are loaded in the iron-based metal organic framework nano particles, so that the transdermal absorption of the medicine is improved, the pH response release property is realized, the dosage of active ingredients permeating into a focus part and the lasting action time are effectively increased, and then a coating layer is formed by polydopamine, so that the anti-inflammatory effect is improved. The dispersibility and compatibility of the drug loading system in vivo are further enhanced, the drug effect can be fully exerted, and the treatment effect on the hyperplasia of mammary glands is remarkably improved.

The invention discloses an application of a nano-drug and combined radiotherapy in cancer treatment, and relates to the technical field of nanotechnology and biomedicine. The nano-drug (GL) obtained by the simple preparation method is a gambogic acid loaded nano-liposome, and the GL has good biocompatibility and passive targeting property. According to the invention, GL and FLASH radiotherapy are combined to treat cancers, and through the synergistic effect of GL and FLASH radiotherapy, double striking on tumor cells is realized, so that the anti-tumor effect is remarkably enhanced, side effects in the treatment process are reduced, and the life quality of patients is improved. Besides, the combined treatment strategy effectively overcomes the problem that cancer is not sensitive to existing radiotherapy and chemotherapy, more remarkable and efficient anti-tumor effect is achieved, more treatment choices and hopes are brought to cancer patients, and a new way is opened up for cancer treatment.

The invention discloses special cement for a wind power generation concrete tower and a preparation method and belongs to the technical field of cement. The brick comprises the following components in parts by mass: 80-85 parts of clinker, 3-5 parts of gypsum, 3-4 parts of stones, 8-12 parts of mineral powder and a grinding aid, the content of tetra calcium aluminoferrite in the clinker is greater than or equal to 14%, and the alkali content is 0.45-0.55%; comprising the following steps: (1) adding clinker, gypsum and stones into a roller press, and extruding to obtain a component A; (2) selecting the component A by a powder concentrator, and mixing the selected component A with a grinding aid to obtain a component B; and (3) uniformly mixing the mineral powder and the ground component B to obtain the special cement for the wind power generation concrete tower. The prepared special cement for the wind power generation concrete tower has relatively high compressive strength; the low-alkali clinker is adopted, so that the low-alkali clinker has high adaptability, and the content of tetra calcium aluminoferrite in the clinker is greater than or equal to 14%, so that the low-alkali clinker has relatively high breaking strength; the proportion of the clinker in the special cement for the wind power generation concrete tower is high, and the proportion of other auxiliary materials is low, so that the standard consistency water consumption of the cement can be effectively reduced.

The invention provides a positive pole piece, a preparation method thereof and a battery, and aims to solve the technical problems that the capacity of LMFP is difficult to effectively exert and the cycle life of the battery is poor. The positive pole piece comprises a current collector and a first active material layer and a second active material layer which are arranged on the current collector, and the first active material layer and the second active material layer are sequentially distributed in the direction away from the current collector; the first active material layer and the second active material layer both contain lithium manganese iron phosphate; the first active material layer further comprises a first conductive agent and a first lithium supplement agent, and the second active material layer further comprises a second conductive agent and a second lithium supplement agent; wherein the gram volume K1 of the first lithium supplement agent is greater than the gram volume K2 of the second lithium supplement agent; the mass percentage D1 of the first conductive agent in the first active material layer is greater than the mass percentage D2 of the second conductive agent in the second active material layer.

The invention relates to the technical field of live broadcast systems, and discloses a multi-scene live broadcast system, which comprises an acquisition module, an encoding module, a transmission module, a processing module, a storage module, a playing module and an interaction module, and is characterized in that the acquisition module, the encoding module, the transmission module, the processing module, the storage module, the playing module and the interaction module are arranged; the system can meet the requirements of various scenes such as live broadcast with goods, online education, entertainment live broadcast and the like, provides more flexible and diversified live broadcast services, adopts advanced coding technologies such as an AAC encoder and an H.264 encoder, carries out quantization processing, improves the compression efficiency and transmission stability of audio and video data, improves the quality of live broadcast pictures and sounds, and improves the user experience. The problems of jamming, distortion and the like are reduced; the interactive experience can be enhanced, the interactive experience between the users is enhanced through the arrangement of the interactive module, the users can participate in live broadcast through various interactive modes, and the participation sense and the satisfaction degree of the users are improved.

The invention discloses polyurethane resin with a super-hydrophobic surface and a preparation method of the polyurethane resin, and belongs to the technical field of modified polyurethane materials. According to the invention, 2, 2 '-diallyl bisphenol A and a fluorine-containing thiol monomer react to introduce a fluorine-containing carbon chain, and then fluorinated modified 2, 2'-diallyl bisphenol A and tetramethoxysilane are used for treating nano zinc oxide, so that the content of active oxygen groups is reduced, a siloxane network structure is formed, the action with water molecules is reduced, and the hydrophobicity is improved. Secondly, the 2, 2 '-diallyl bisphenol A reacts with amino propyl isobutyl POSS to generate a benzoxazine structure, the POSS structure is introduced, the nano-size effect of the benzoxazine structure fills limited movement between molecular chains, a cage-shaped structure serves as a cross-linking point, the mechanical property is improved, and hydrophobicity is achieved. When polyurethane is prepared, 3, 3-bis (hydroxymethyl) azetidine and a benzoxazine structure are subjected to ring opening crosslinking, bonding, dispersity and stability of fluorinated modified nanoparticles and a matrix are enhanced, a complex network structure is formed, the surface roughness is increased, the water contact area is reduced, and super-hydrophobicity is achieved.

The invention discloses a Kunlun chrysanthemum bud extract compound with intestinal probiotic and hypoglycemic activity and a preparation method thereof, and belongs to the technical field of natural compound extraction. The preparation method comprises the following steps: firstly, fermenting Kunlun chrysanthemum bud powder by adopting lactobacillus acidophilus, then repeatedly extracting by utilizing a gradient ethanol solvent, and preparing an extract compound by taking water as a solvent, so that the stability of an organic solvent extract in an aqueous solution is remarkably improved; a further research shows that when the absolute ethyl alcohol extract, the water extract and the extract compound of the Kunlun chrysanthemum buds are independently used as prebiotics, intestinal microorganisms can be changed; when being used as an alpha-glucosidase inhibitor, the alpha-glucosidase inhibitor shows in-vitro hypoglycemic activity, however, a compound prepared from absolute ethyl alcohol and a water extract can better play the role, and the compound shows a synergistic effect when playing the role. And a theoretical basis is provided for the application in the fields of prebiotics and blood glucose reduction.

The invention relates to the technical field of vehicle integrated design and control, and provides an independent steer-by-wire system for a full-vector power chassis and a control method of the independent steer-by-wire system for the full-vector power chassis. Then the steering intention is matched with a corresponding driver map curve, the expected transverse speed and the expected yaw velocity are obtained in combination with the driving parameters, the demanded centripetal force needed by the steering intention is compared with the centripetal force capable of being provided by the vehicle under the current driving condition, and a corresponding Ackerman steering map curve is selected to obtain the optimal Ackerman four-wheel steering angle; and finally, controlling a steering angle module of the vehicle to steer according to the optimal Ackerman four-wheel steering angle, the expected transverse speed and the expected yaw velocity. According to the invention, steering control can be well carried out.

The invention belongs to the technical field of video players, and discloses a Web video player optimization method supporting an H265 coding format, which comprises the following specific steps: step 1, a player is mainly divided into four parts and three threads, namely a UI (User Interface), a Loader, a data processing part and a data rendering part, and one thread is a main thread; one thread is a data loading thread; the last thread is a data processing thread; and step 2, UI: displaying by a player, wherein the UI comprises two parts, i.e., a screen and a controlbar. A traditional Web player can be optimized to improve user experience, H265 video decoding is supported, high-definition video playing in a low-bandwidth environment is achieved, a user-friendly interactive interface is provided, a user can conveniently conduct video playing control, playing performance is optimized, delay and lagging phenomena are reduced, complex video processing tasks are conducted through Web Workers, and the user experience is improved. The method has the advantages of improving page response speed, automatically loading and caching subsequent related videos during playing, improving playing speed and the like.

The present invention relates to a high free volume binder for the preparation of lithium ion battery electrode materials. As an important component of lithium ion batteries, the binder can effectively bond active materials, conductive carbon and current collectors into a whole to ensure the stability of the electrode materials during the charge and discharge cycle. Therefore, the selection of high-performance binders is particularly important. In order to improve the electrochemical performance of lithium ion batteries and enhance their energy density, the present invention uses PTMSP as a lithium ion battery binder to obtain a flexible self-supporting electrode without current collector and an ultra-low binder ratio electrode under different binder ratios. PTMSP has a significant effect on relieving stress release during the electrode cycle, and also effectively reduces the internal resistance of the battery and improves the discharge capacity and cycle life of the battery, thereby realizing a high energy density battery. At the same time, the preparation method and process of the electrode sheet in the present invention are simple, suitable for industrial large-scale preparation, and have broad market application prospects.

The invention relates to a planetary gear two-gear transmission and a working method thereof.The planetary gear two-gear transmission comprises a transmission shell, a planetary gear transmission mechanism arranged in the transmission shell, a normally-closed clutch and a first actuator driving the normally-closed clutch, a top disc is arranged on the right side of the normally-closed clutch, and the top disc is in transmission connection with the normally-closed clutch in the axial sliding and rotating direction; the right end of the top disc is slidably connected with a gear ring on the periphery of the planetary gear transmission mechanism, and a brake concave part is arranged on the periphery of the left end of the top disc. A braking device is arranged on the transmission shell and comprises a braking block, the braking block is driven by a second actuator to move in the direction perpendicular to the axis of the transmission to be wedged into the braking concave part, and the first actuator and the second actuator share the same power. According to the invention, the advantage of smooth and rapid power-interruption-free gear shifting of the planetary gear can be better exerted, the phenomenon of'locking 'chip burning caused by simultaneous combination of the two clutches is avoided, and the problem of power interruption caused by simultaneous separation of the two clutches can also be avoided.

The invention belongs to the technical field of traditional Chinese medicine composition preparation, particularly relates to a composition prepared by taking fructus chebulae and liquorice as main materials, and further relates to a preparation method of the composition and application of the composition in antibacterial and anti-inflammatory, anti-oxidation, whitening, anti-saccharification and antipruritic products. According to the composition disclosed by the invention, main materials comprise fructus chebulae and liquorice; the composition is obtained by crushing the fructus chebulae and the liquorice, performing enzymolysis, performing water extraction, performing concentration, performing alcohol extraction and performing purification. Based on different effects, different combination schemes of the fructus chebulae and the liquorice are provided, so that the effects of the fructus chebulae and the liquorice are more remarkable after the fructus chebulae and the liquorice are combined according to different proportions; in addition, it is also verified that after the medicine terminalia fruits and the licorice roots in different proportions are combined, certain differences exist when the medicine terminalia fruits and the licorice roots are applied to different products. On the basis that the fructus chebulae and the liquorice are combined according to a reasonable proportion, the invention further provides a preparation method of products which are suitable for the formulas and have different effects.

The invention relates to the field of information matching, in particular to a building material intelligent purchase matching and recommendation method, which comprises the following steps: S1, building material product feature acquisition; s2, analyzing user demand characteristics; s3, performing similarity analysis; s4, user evaluation analysis; s5, carrying out regional applicability analysis; s6, building material product recommendation analysis; according to the method, the similarity between the characteristics of the various building material products and the user demand characteristics is obtained through analysis according to the characteristic parameters of the various building material products and the user demand characteristic evaluation parameters, and the user evaluation coefficients of the suppliers of the various building material products are obtained through obtaining the user evaluation analysis of the suppliers of the various building material products. According to the method, regional climate applicability and regional environment applicability of various building material products are obtained, regional applicability evaluation coefficients of the various building material products are obtained through analysis, recommendation indexes of the various building material products are obtained through comprehensive analysis, and all preferred building material products are screened out in combination with prices; and the building material product meeting the actual demand of the user can be more accurately recommended to the user.

The utility model discloses a revolver toy pistol which comprises a pistol body, a rotating wheel, a trigger, a driving hammer, a pressing pump, a water cavity, a nozzle, a water outlet pipe, a water inlet pipe and a linkage pawl, the pressing pump is arranged in the pistol body corresponding to the rear side position of the trigger, the lower end of the linkage pawl is connected with the trigger, and the upper end of the linkage pawl extends to the position of the rotating wheel. When the trigger is pulled, the pressing pump is pressed down, so that water in the water cavity is pumped, and the water is conveyed to the nozzle through the water outlet pipe to be sprayed out. Meanwhile, the linkage pawl pushes the pushing teeth on the rotating wheel under the action of the trigger, the rotating wheel is forced to rotate, the rotating action of the rotating wheel of the revolver is simulated, the simulation effect is good, and the interestingness of the toy is effectively improved; the whole body is in a revolver shape, is novel in modeling, small in appearance and light in weight, and is convenient for young children to carry and play; in addition, when the trigger is pulled, the driving hammer can be pushed to lean backwards and rapidly reset to hit and produce sound, the firing process of a real pistol is simulated, the firing effect is further enhanced, and the entertainment of the toy is improved.

The invention relates to the technical field of cosmetics, in particular to a composition and application thereof in preparation of beauty and skin care products. The invention provides a fermentation filtrate of Bifidobacterium longum subsp. Infantis (Bifidobacterium longum subsp. Infantis) and a composition of a Jasminum grandiflorus extract, and provides an application of the composition in the aspects of oxidation resistance, light damage resistance and aging resistance. Experiments show that the filtrate and jasminum grandiflorum can have a synergistic effect in anti-aging. The composition can be applied to the field of food or cosmetics, has a wider efficacy range, and particularly has better play in the field of beauty and skin care.

The invention discloses recombinant human chemical fibronectin as well as a coding gene and application thereof. The method comprises the following steps: performing codon optimization on an amino acid sequence of recombinant human chemical fibronectin according to codon preference of pichia pastoris to obtain a coding gene nucleotide sequence SEQ ID NO.2, cloning the coding gene nucleotide sequence SEQ ID NO.2 between EcoRI and NotI restriction enzyme cutting sites of a pichia pastoris expression vector pPIC9K to obtain a recombinant expression vector pPIC9K-FNc, and transferring the recombinant expression vector pPIC9K-FNc into a P.pastoris GS115 expression host cell to obtain the recombinant human chemical fibronectin. Recombinant pichia pastoris P.pastoris GS115 / pPIC9K-FNc is obtained through genetic mycin G418 screening, then recombinant bacteria are subjected to fermentation culture and are subjected to induced expression by using methanol, and then the recombinant human chemical fibronectin is obtained after purification. The fibronectin produced by the method is large in molecular weight and has better biological activities such as wrinkle resistance and barrier repair.

The invention discloses lactobacillus crispatus capable of efficiently inhibiting alpha-glucosidase and application of the lactobacillus crispatus. The lactobacillus crispatus JQH7 strain provided by the invention is separated and identified from human excrement, has relatively strong self-aggregation capability which can reach about 96% in 24 hours, can be better adhered to biological or non-biological surfaces, and is beneficial to effective colonization in an intestinal environment. Meanwhile, the JQH7 strain has certain antioxidant capacity, and the scavenging rate of a bacterial suspension of the JQH7 strain on DPPH free radicals is 49.18%; the JQH7 strain has the capability of efficiently inhibiting alpha-glucosidase, the effect of the JQH7 strain is equivalent to that of a clinical medicine acarbose, and compared with the acarbose, the JQH7 strain is safe in source, free of side effects, low in price, easy to obtain and easy to prepare. The invention provides more sources and choices for preparing preparations for efficiently inhibiting alpha-glucosidase and hypoglycemic products, provides a new thought for adjuvant therapy of diabetes, and is beneficial to improving and controlling the blood sugar of diabetics.