40results about How to "Controllable cost" patented technology

The invention relates to a gymnasium body-building movement identification method and device based on depth learning, takes real-time videos as media and employs a method based on depth learning to carry out movement normalization identification. The method comprises steps that (1), data acquisition, normative movements are recorded as normative movement images; (2), data annotation, normative movement classification of the normative movement images is carried out; (3), data training, an object detection identification framework based on the convolutional neural network of the depth learning method Caffe is employed to acquire a normative movement identification model; (4), movement identification, user shooting is carried out, user movements in line with normative movement classificationof the normative movement identification model are identified; and (5), movement scoring, normative similarity scores and correction plans are outputted. The method is advantaged in that a user has noneed to wear or replace expensive equipment, cost is controllable, videos which are popular in intelligent terminals at present and are convenient to use are taken as media, precise movement data isgenerated for the user, false movements are corrected, and the better body-building effect is realized.

The invention discloses a preparation method of graphene-elastic polyester in-situ polymerized compound functional fibers. The method comprises the following steps: adding graphene into a polyester polymer system in an in-situ polymerization process and compounding the graphene into a polyester matrix through polymerization; carrying out strip casting and dicing to obtain graphene-polyester in-situ polymerized compound slices; carrying out drying treatment on the graphene-polyester in-situ polymerized compound slices; then melting and spinning to obtain the graphene-elastic polyester in-situ polymerized compound functional fibers. According to the preparation method, excellent enhancing and functional properties of the graphene are utilized; the graphene is used as filling and the graphene-polyester compound slices are obtained by means of realizing compounding through polyester molecule in-situ polymerization; then melting and spinning are performed to prepare PTT (Polytrimethylene Terephthalate) and PBT (Polybutylene Terephthalate) functional fibers. According to an in-situ polymerization compounding method, the strength of PTT and PBT polyester fibers is effectively enhanced and good resilience and elongation at break are certainly improved; meanwhile, various functional properties are given to the polyester fibers.

The invention provides a fire warning method for a battery prefabricated cabin of a lithium iron phosphate energy storage power station, and relates to the field of fire protection. A fire alarm controller, a fire detection alarm system and a fire extinguishing system which are connected to the fire alarm controller, a BMS battery management system, and a combustible gas explosion-proof system connected to the BMS battery management system are arranged in the battery prefabricated cabin. A combustible gas monitoring device is added to the fire detection alarm system, alarm thresholds in earlywarning and later warning stages are set respectively during combustible gas monitoring, and the combustible gas explosion-proof system and the fire extinguishing system are controlled to act in different alarm stages respectively. Through two-stage multi-level fire warning set according to combustible gas monitoring, the accuracy and reliability of thermal runaway detection warning for lithium iron phosphate batteries are improved, and safe operation of an energy storage system is guaranteed.

The invention provides a catalyst for directly dehydrogenating propane to prepare propylene. The catalyst comprises a carrier, an active component loaded on the carrier and an auxiliary agent, wherein the carrier is a nano thin-sheet MFI structure molecular sieve; the auxiliary agent comprises at least one of IIB group metal elements and at least one of alkaline earth metal elements. The invention further provides a preparation method of the catalyst; the preparation method comprises the following steps: soaking the nano thin-sheet MFI structure molecular sieve into a water solution of a platinum group metal compound, a IIB group metal compound and an alkaline earth metal compound; drying and roasting to obtain a molecular sieve composition, so as to obtain a catalyst product. The invention further provides application of the catalyst to reaction for directly dehydrogenating the propane to prepare the propylene.

A hardening process of laser ceramic alloying of the cutting pick head of a coal mining machine or a coal cutter comprises procedures as follows: the surface of the cutting pick head is preplaced; then a preplaced ceramic alloying coating is recombined; and finally, the laser ceramic alloying of the cutting pick head is hardened. The hardening process has advantages and characteristics that the hardening process can be finished directly on a shaped cutting pick without subsequent handling and heating-up; and a finished product can be obtained after laser processing. The hardening process has simple technique, controllable cost, evident hardening effect and longer service life that is 5 to 6 times longer than the former matrix. Only the cutting pick head is processed, so the deformation of a cutting pick body and heat affect are extremely little.

The invention relates to the technical field of monitoring of floating oil, and in particular relates to thermal infrared imaging measuring system and method for an oil film on the water surface. The system comprises a thermal infrared imaging instrument, an optical filter unit, a polarizing film unit and a reflecting vibration mirror which are sequentially arranged; the thermal infrared imaging instrument is used for acquiring thermal infrared information of the current water source; the optical filter unit is equipped with a plurality of optical filters with different wave bands, and the plurality of optical filters can be adjusted to be respectively centered to a lens of the thermal infrared imaging instrument; the polarizing film unit is equipped with a plurality of polarizing films with different polarizing angles, and the plurality of polarizing films can be adjusted to be respectively centered to a lens of the thermal infrared imaging instrument; the reflecting vibration mirror is used for adjusting the working angle. Compared with the prior art, the system has the advantages that the interference of outside solar radiation, wind speed and other time and environmental factors on the measurement of the oil film on the water surface are avoided; the system is small in size, can quickly and accurately qualitatively and quantitatively measure the floating oil on the water surface, and is relatively high in operability, and controllable in manufacturing cost and use cost.

The invention discloses a rubber asphalt composite material with excellent cold resistance. The rubber asphalt composite material comprises the following components: 50 to 80 parts of anionic emulsified asphalt, 20 to 50 parts of anionic rubber latex, 2 to 15 parts of a plasticizer, and 2.0 to 7.0 parts of an additive, wherein the pH value is 9 to 13, and the sum of parts by weight of the anionic emulsified asphalt and that of the anionic rubber latex is 100. According to the rubber asphalt composite material with excellent cold resistance, a waterproof coating film adopting the composite material provided by the invention can be resistant to minus 40 DEG C temperature, has softness, cannot crack and still has a waterproof function even though an object to be coated crakes immediately, and has high resistance.

The invention discloses a device for testing the emergency braking function of an autonomous vehicle through combination of virtuality and reality, and the device comprises a positioning module which comprises an antenna and an inertia measurement unit, and a scene design module comprising a map storage unit, an autonomous vehicle management unit, a virtual target vehicle management unit and a scene test evaluation calculation unit; and once the autonomous vehicle runs to reach a triggering condition, the relative position and the movement track of the virtual target vehicle are planned on the map, and motion information of the virtual target vehicle is implanted into the autonomous vehicle by means of protocol. A scene test evaluation calculation unit compares the relationship between the vehicle head position of the autonomous vehicle and the vehicle tail position of the virtual target vehicle, if the vehicle head position of the autonomous vehicle and the vehicle tail position of the virtual target vehicle are not overlapped, the test is passed, and otherwise, the collision is indicated. The emergency braking function of the autonomous vehicle is tested in a virtuality and reality combined mode, and the device has the advantages of being low in cost, high in efficiency and high in success rate.

The invention discloses a preparation method and control method of micro-droplets. When the micro-droplets are prepared, the super-amphiphobic surface is firstly prepared, then, micro-droplets with different sizes can be formed on the super-amphiphobic surface by adjusting the suspension height and the inclination angle of the super-amphiphobic surface and the impact speed of the droplets on the super-amphiphobic surface, then a control part with negative electricity is used for being close to the micro-droplets, and under the interaction of charges, grabbing and control over the micro-droplets are achieved. Different from the prior art, the method provided by the invention does not need any additional complex equipment or driving mechanism, can obtain micron-to-millimeter level controllable liquid drops only through the impact of the liquid drops on the super-amphiphobic surface, and can realize lossless control of the liquid drops. The method is simple, convenient and effective, andan effective candidate method is provided for generation and control application of the micro-droplets.

The invention provides a sound producing device capable of producing sound by using air. The sound producing device comprises an air cylinder, a piston and a gun head. The piston is sleeved with a planar sealing ring which can prevent air circulation of an upper air chamber and a lower air chamber of the air cylinder. The cylinder wall portion, above a protruding table, of the air cylinder is uniformly provided with explosion openings. When the piston is attached to the protruding table, the sealing ring on the piston is right pressed against the inner sides of the explosion openings to seal the explosion openings. The device is wide in application range and can be applied to flammable places such as coal mines and oil and gas fields; the device can even be used in water; the device has economic value, social value and cultural value; selling air firecrackers can bring economic income for employees, enterprises and the government, so that the economic value is obvious; the sound producing device is a safe and environmentally-friendly firecracker, and pollution can be reduced greatly if the device replaces an explosive firecracker, so that the sound producing device is of great social importance; the sound producing device enables people to continue and develop the traditional firecracker setting-off culture without polluting the environment.

The invention relates to a preparation method of a modified nano-hydroxyapatite composite material for dental restoration and belongs to the field of biomedical materials. The modified nano-hydroxyapatite composite material is obtained by taking soluble calcium salt and soluble phosphate as raw materials, taking compound amino acid and / or graphene oxide as a modification means and adopting a chemical homogeneous precipitation method. The composite material has the following structure characteristics: the composite material has an enamel-like nanorod-shaped structure with the particle diameterof 3 to 30 nm and the length of 50 to 300 nm, and has a relatively low crystallization degree. The composite material prepared by the invention has good biosafety and biocompatibility, and has a goodrestoration effect on enamel or dentin surface demineralization and deep-layer demineralization; a new remineralization restoration layer can be formed on a demineralized enamel or dentin surface through nucleation, so that the surface hardness and antibacterial performance of teeth are improved and novel possibility is provided for clinical remineralization restoration of the teeth.

The invention relates to a truffle health care product and a preparation method thereof. The preparation method includes steps of A, inoculating truffle to culture solution and allowing for shake culture on a shaking table to obtain strain liquor; B, inoculating the strain liquor obtained in step A to liquid medium containing barley malt and soybeans and allowing for aerobic culture or anaerobic culture to obtain fermented truffle mycelia and truffle fermentation liquor; C, subjecting the truffle mycelia obtained in step B to cell tissue disruption and extracting with water to obtain truffle mycelia extract; and D, mixing the truffle fermentation liquor obtained in step B and the truffle mycelium extract obtained in step C and diluting or concentrating the obtained mixed liquor to obtain the truffle health care product. Since the industrialized liquid-submerged fermentation technique is used, industrialized mass breeding of the truffle in the liquid culture medium is achieved, and the preparation method is simple in process and low in cost.

The invention discloses a method for reducing electric leakage of a trench gate structure semi-floating gate device. The method includes the step of performing oxidation treatment on silicon remaining at the position close to a field oxide layer side wall in a trench gate channel region during trench etching to form a side wall sacrificial oxide layer with an insulating effect, thereby preventing the current from flowing in the direction of the silicon remaining in the side wall, enabling the current to flow in the direction of a trench-shaped channel of the device and reducing the phenomenon of electric leakage between a source region and a drain region. The method for reducing electric leakage of the trench gate structure semi-floating gate device can be integrated with existing processes and is controllable in cost.

The invention discloses a prefabricated wall greening planting container and a wall greening method. The container comprises a wall connecting structure, a planting box and a planting module arrangedinside the planting box; the planting box comprises a first back board, a first front baffle, a first base plate, two symmetrically-arranged first side plates and a top cover. Suspension grooves for clamping a transverse secondary keel are formed in the upper portion of the outer side face of the first back board at intervals, the lower portion of the outer side face of the first back board is provided with a pipeline bearing piece, and the first back board is further provided with a water storage and drainage hole through which the pipeline penetrates; the upper portion, close to one side ofthe back board, of the first side board is symmetrically provided with a pipeline fixing grooves; the top cover comprises a cover plate, a supporting stand column and an air exchange region panel, andsupporting stand columns are arranged at the lower end face of the cover plate at intervals; a cylindrical bearing vertical parts are arranged at the upper end face of the first base plate at intervals, and the bottoms of the supporting stand columns sleeve the vertical vertical parts. The original wall structure is not changed, the greening area can be increased, and the building appearance is directly beautified.

The invention discloses a trench power device and a manufacturing method thereof, and relates to the field of power device semiconductor manufacturing, and the method comprises the following steps: A,preparing a cellular structure; B, preparing a contact hole and a tungsten bolt; C, etching to form a circuit; and D, depositing a passivation layer, and etching the passivation layer. According to the invention, the process limitation on the relative positions of the gate trench and the source trench imposed by the process ability of a photoetching machine platform of a factory is overcome, andthe integration level is further improved. By manufacturing the gate trench and the source trench at the same time, the difficulty of the photoetching process is overcome, and the cost is controllabledue to the fact that a mask plate is not added. The cell density can be further reduced, the conduction resistance is reduced, and the device efficiency is improved.

The invention discloses a key-joint bearing platform and a landscape pier comprising the same and being used for karst geology. The key-joint bearing platform comprises concrete and a cage-shaped frame, wherein the concrete is poured into the cage-shaped frame; the cage-shaped frame mainly comprises a group of horizontal ring-shaped stirrups and two groups of vertical ring-shaped stirrups which are mutually vertical and are sheathed and hooped mutually in a two-two manner; all the horizontal ring-shaped stirrups are distributed in parallel and in the vertical direction, while all the vertical ring-shaped stirrups are arranged distributed in parallel and in the horizontal direction. The key-joint bearing platform and the landscape pier disclosed by the invention have the advantages that the stirrups in the three directions are nested and sheathed to tightly encircle the concrete inside and form a cage-body sheathing and hooping effect, so that the three-dimensional stress intensity of the concrete is increased and further the core strength of the concrete is improved compared with concrete in a single-direction stress state; three-dimensional orthogonal-stressing closed stirrups form a space-isotropic-orthogonal closed stressing system, so that the smooth transferring of complex stress flow of pulling, pressing, bending, shearing and twisting from an upper structure of a cross joint to a lower structure is realized.

The invention relates to a preparation method and a product thereof of a stock solution colored dark black ultrafine chinlon fiber. The preparation method of the stock solution colored dark black ultrafine chinlon fiber comprises the following steps: preparation of a PE composite material for a carbon-based colorant: blending and extruding 40-60 percent by weight of PE and 60-40 percent by weightof carbon-based colorant to obtain the PE composite material; melting and blending 8-30 percent of PE composite material, 2-5 percent of solubilizer maleic anhydride melt grafted ethylene (PE-g-MAH) and 65-90 percent of PA6, and extruding and granulating to obtain chinlon color masterbatches, so that the carbon-based colorant forms discontinuous fine capsules in the masterbatches; preparation of the ultrafine chinlon fiber. After being opened, the stock solution colored dark black polyester / chinlon daisy ultrafine fiber obtained by the utilization of the preparation method provided by the invention has a black chrominance L of less than or equal to 14, a color fastness to rubbing of greater than or equal to grade 4, a color fastness to washing of greater than or equal to grade 4, a color fastness to sunlight of greater than or equal to grade 4 and a splicing and mutual dyeing degree of greater than or equal to grade 4, and is controllable in cost, thereby having a higher market value.

The invention discloses an in-vitro new coronavirus optical disinfecting and sterilizing method capable of realizing man-machine coexistence. The method comprises the following steps: firstly, carrying out light source type selection, design and processing according to the disinfection effect of ultraviolet light on new coronavirus aerosol; then carrying out photocatalyst type selection and designprocessing according to the characteristic that a photocatalyst net film can generate a strong oxidation reaction with viruses under the irradiation of ultraviolet light with specific wave band and energy; and finally, designing an optical disinfecting and sterilizing composite module according to the use scene of a new coronavirus disinfecting and sterilizing device, and arranging a mechanical structure for avoiding ultraviolet light leakage at the top of an air duct to ensure that people can simultaneously exist during space sterilization and disinfection. The device can be used as a core disinfecting and sterilizing module of a current air purifier and a mainstream air conditioner, and has the advantages of being controllable in cost, environmentally friendly, high in new coronavirus disinfection efficiency and capable of achieving man-machine coexistence.

The invention discloses an FRP balcony thermal bridge cutoff structure and method. The FRP balcony thermal bridge cutoff structure comprises a tension piece, a compression piece, a heat preservation material and a packaging piece and further comprises a shear-resistant piece, wherein the packaging piece is filled with the heat preservation material; the tension piece is made of FRP rib materials and located on the upper portion of the packaging piece, the two ends of the tension piece stretch out of the packaging piece, the end stretching out of the packaging piece is used for stretching intoa main floor slab, and the other end stretching out of the packaging piece is used for stretching into a balcony slab; and the compression piece is made of FRP rib materials and located on the lower portion of the packaging piece, one end of the compression piece stretches out of the packaging piece, and the end stretching out of the packaging piece is used for stretching into the balcony slab. According to the FRP balcony thermal bridge cutoff structure, the excellent mechanical property and thermal property of FRP are fully utilized, and the completeness of a load force transmission path isguaranteed while building thermal bridges are reduced. Manufacturing is easy and convenient, the stress property is good, the heat insulation property is excellent, the local heat transfer amount of the thermal bridges can be effectively reduced, the risk of structural moisture condensation and mildewing is reduced, and the living comfort of a house is improved.

The invention discloses an environment-friendly and efficient dewatering and drying method for dredging ultra-soft soil. The method comprises the steps that S1, working cushion layers are laid in a storage yard, specifically, the working cushion layers are laid in a dewatering and drying area of a dredging ultra-soft soil stacking yard and the top of an ultra-soft soil body; s2, arranging an air exhaust assembly, a water drainage assembly, a temperature control assembly and a pressure control assembly in the soil body; s3, a soil body closed environment is constructed; step S4, dehydrating and drying the soil body in stages through a temperature and pressure double-control technology, wherein the temperature and pressure double-control technology comprises an air exhaust and water drainage test extraction stage in the first stage, a vacuum test air exhaust load reaching stage in the second stage and a temperature and pressure double-control stage in the third stage; and S5, when the membrane top of the dredged ultra-soft soil body settles stably and drainage of the drainage assembly fails, operation is stopped. According to the method, materials and reagents are not added into the soil body, moisture in the dredged ultra-soft soil can be discharged in an environment-friendly and efficient mode, the size of the dredged ultra-soft soil is efficiently reduced, the space of a storage yard is enlarged, the treatment period is short, construction is convenient, and treated bottom mud can be recycled.

The invention relates to a pine mushroom product and a preparation method thereof. The preparation method includes the steps of A, inoculating pine mushroom to culture solution, and performing shade culture on a shaker to obtain fungus solution; B, inoculating the fungus solution obtained in the step A to liquid medium containing barley malt and soybean, and performing aerobic or anaerobic culture to obtain fermented pine mushroom mycelia and pine mushroom fermentation broth; C, subjecting the pine mushroom mycelia obtained in the step B to cell tissue breakage, and extracting with water to obtain pine mushroom mycelia extract; and D, mixing the pine mushroom fermentation broth obtained in the step B and the pine mushroom mycelia extract obtained in the step C, and diluting or concentrating obtained mixed liquor to obtain the pine mushroom health product. By the industrial submerged fermentation technology, the pine mushroom culture can be propagated industrially and massively in the liquid medium. Therefore, the process is simple, and the cost is low.

Aiming at problems existing in the prior art, the invention provides a composite connector for a high-speed motor vehicle anti-yaw damper system. The provided composite connector for the high-speed motor vehicle anti-yaw damper system comprises a component A and a component B. The component A comprises an installation rod and a tubular rubber layer. The component B comprises a ball joint bearing, a circlip for hole and an outer ring. The tubular rubber layer of the component A and the ball joint bearing of the component B are in series connection and are fixed in the outer ring of the component B. Therefore, when the connector is subjected to the axial load of a damper, the rigidity of a ball bearing is very high, and after rubber is pressed into the ball bearing, the series connection rigidity of the rubber and the ball bearing meets the rigidity requirement of a vehicle for the damper. When the installation rod turns or swings relative to the damper, a ball head of the ball bearing and a ball bowl slide and rotate relatively, and due to the fact that resisting moment is very small, the influence of rotation on the rubber layer and a damper body is very small. In addition, the composite connector is simple in structure and controllable in cost and has outstanding scale application prospects.

The invention discloses a large-gradient indoor ski resort trail and an antiskid making method. The large-gradient indoor ski resort trail comprises a trail, wherein the trail is arranged on a base floor slab, is continuously distributed along the base floor slab, and comprises a plurality of unit trails which are continuously arranged; each unit trail adopts a sectional structure, and comprises two sections of first trails and a second trail arranged between the two sections of first trails; the joint between each first trail and the second trail is disconnected, a deformation seam is reserved in each disconnected place, and stuffings are arranged in the deformation seam; a polyurethane waterproof additional layer is coated onto the surface of each deformation seam; and height of the second trail is larger than that of each first trail, and the connecting place of the second trail and each first trail is in inclined transition. The large-gradient indoor ski resort trail disclosed by the invention is reasonable in structure and controllable in cost, has good anti-slippage capacity, and has high structure stability. The technical problems of downward slippage of the trail having various making layer along the gradient direction, and concrete cracks of a surface layer when the gradient of a large-area indoor ski resort is larger than 17 degrees are solved, and safety and reliability after the trail is put into use can be guaranteed.

The invention provides a construction method of a concrete brick curtain wall. According to installing point positions of a steel structure bearing frame, the steel structure bearing frame is installed on the wall face of a building main body structure. According to the installing point positions of concrete decoration bricks on the steel structure bearing frame, the concrete decoration bricks arearranged on the steel structure bearing frame at one or more preset angle in a pixel way, are common universal bricks and are of hollow structures, raw materials for making the concrete decoration bricks are easy to obtain, the manufacturing cost is controllable, and diverse arrangement of the concrete decoration bricks and a simple concrete colored tape bring a unique building art style throughmatching of the steel structure bearing frame and the concrete decoration bricks. In addition, the concrete decoration bricks are wholly hollow, natural wind can carry away hot air in time, and wholeheat dissipation and energy saving are achieved.

The invention discloses a protection device for child intussusception reduction, which comprises an elastic cushion, the elastic cushion comprises an upper cotton layer used for supporting a human body to lie flat and a lower anti-skid layer used for being laid and limited with a placement surface, a plurality of through pipes are arranged between the cotton layer and the anti-skid layer, the front ends of the through pipes extend to the surface of the cotton layer, the rear ends of the through pipes extend to one side of the elastic cushion, a limiting belt penetrates through the through pipes, the front end of the limiting belt penetrates out of the surface of the cotton layer, the front end of the limiting belt is connected with elastic rings used for being arranged on the hands and the feet of the human body in a sleeved mode, the rear end of the limiting belt penetrates out of one side edge of the elastic cushion, a clamping piece is detachably arranged at the rear end of the limiting belt, and when the clamping piece moves to abut against the side edge of the elastic cushion, the limiting belt is limited to be pulled forwards. According to the invention, relative limiting of the four limbs of an infant is achieved, it is guaranteed that X-ray abdominal plain film examination and the reduction are normally conducted, family members can relatively leave a radiation area, the health of the family members is not affected by the examination and the reduction, the cost is controllable, and application and popularization are facilitated.

The invention discloses a multifunctional vehicle-mounted combined antenna and a vehicle. The multifunctional vehicle-mounted combined antenna comprises a dielectric substrate, wherein the middle region of the dielectric substrate is provided with a navigation antenna, the dielectric substrate is further provided with an LTE-MIMO antenna, a V2X-MIMO antenna, a WIFI master antenna and a WIFI slave antenna, the LTE-MIMO antenna comprises two LTE antennas, and the V2X-MIMO antenna comprises a master V2X antenna and a slave V2X antenna; and the navigation antenna, the two LTE antennas, the master V2X master antenna, the slave V2X slave antenna, the WIFI master antenna and the WIFI slave antenna are respectively fed through coaxial cables. The LTE-MIMO antenna, the V2X-MIMO antenna, the WIFI master antenna, the WIFI slave antenna and the navigation antenna are integrated on the dielectric substrate, so that simultaneous working of multiple frequency bands such as 2G / 3G / 4G / 5G and the like can be realized in a limited space, and the multifunctional vehicle-mounted combined antenna adapts to the intelligent development trend of vehicles.

The invention relates to a synthetic intermediate of pleuromutilin antibiotics and a synthetic method thereof. The synthetic intermediate and the synthetic method have the beneficial effects that pleuromutilin is used as a synthetic precursor; double protection Mutilin capable of selectively modifying two active hydroxyl respectively is obtained after a molecule-glycolic acid is removed through hydrolysis; such 4,7-OH double protection Mutilin can be used for further synthesizing tiamulin fumarate or other pleuromutilin antibiotics as needed and is a good semi-synthetic antibiotic precursor; double protection Mutilin is synthesized with pleuromutilin; the yield is between 85% and 96% according to changes of selected raw materials and process ratios; the organic amine recovery rate is more than 84%; the cost is controllable.

The invention relates to a Grifola frondosa health product prepared by submerged fermentation and a preparation method thereof. The preparation method includes the steps of A, inoculating Grifola frondosa to culture solution, and performing shake culture on a shaker to obtain fungus solution; B, inoculating the fungus solution obtained in the step A to liquid medium containing barely malt and soybean; and performing aerobic culture to obtain fermented Grifola frondosa mycelia and Grifola frondosa fermentation broth; C, subjecting the Grifola frondosa mycelia obtained in the step B to cell tissue breakage, and extracting with water to obtain Grifola frondosa mycelia extract; and D, mixing the Grifola frondosa fermentation broth obtained in the step B and the Grifola frondosa mycelia extract obtained in the step C, and concentrating obtained liquor to obtain the Grifola frondosa health product. By the industrial submerged fermentation technology, the Grifola frondosa culture can be propagated industrially and massively in the liquid medium. Therefore, the process is simple, and the cost is low.

The invention discloses a method for synthesizing dimeric acid by a lipoxygenase one-step process. The method provided by the invention comprises the following steps: adding unsaturated fatty acid or its ester and lipoxygenase with stirring into a buffer system with pH 6-10 at the temperature of 0-35 DEG C, allowing oxygen to enter after uniform stirring so as to trigger an hydroperoxidation reaction, keeping for 1-15 min, allowing N2 to enter so as to make the oxygen concentration to be reduced to 0, reacting for 1-2.5 hours, using sulfuric acid or hydrochloric acid solution to adjust pH of a reaction solution to 3.5 so as to end the reaction, using an extractant to make a mixture react, merging extracts and washing by the use of saturated salt water, adding anhydrous magnesium sulfate to remove moisture, and finally removing the extractant in the flow of N2 so as to obtain dimeric acid. Under a green mild condition, dimeric acid is synthesized in an aqueous phase by a one-step enzymic method. Thus, preparation conditions of dimeric acid are improved, and a new idea is also provided for the preparation of dimeric acid.

The invention provides a cell culture medium for culturing primary gastrointestinal stromal tumor cells. The cell culture medium contains gastrin, N2, insulin, a receptor tyrosine kinase ligand and a Rock kinase inhibitor. The invention also provides a method for culturing gastrointestinal stromal tumor cells by adopting the cell culture medium, and application and a method of an amplified cell population obtained by adopting the method in curative effect evaluation or screening.