84results about How to "Control release" patented technology

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 dependency-free anti-aging sleep-aiding preparation and a preparation method thereof, and relates to the technical field of preparations, the anti-aging sleep-aiding preparation comprises an ellipsoidal shell and an ellipsoidal core wrapped in the ellipsoidal shell, the ellipsoidal core comprises an anti-aging agent layer, a water absorption expansion layer and a sleep-aiding agent layer which are stacked in sequence, the water absorption expansion layer protrudes at the two ends of the ellipsoidal core to form small water diversion columns; small water inlet holes are formed in the two ends of the ellipsoidal shell and are connected with small water diversion columns; a plurality of first release holes and a plurality of second release holes are formed in the circumferential surface of the ellipsoidal shell, the plurality of first release holes lead to the anti-aging agent layer, and the plurality of second release holes lead to the sleep aid layer. Through the special structural design of the ellipsoidal shell and the ellipsoidal core, isolated coexistence of anti-aging and sleep-aiding components and controllable release of the anti-aging and sleep-aiding components are achieved, so that the dual effects of anti-aging and sleep-aiding can be achieved, and it is guaranteed that the drug effect is continuously exerted.

The invention relates to the technical field of medicines, and discloses a mannose / trimethyl chitosan modified MXene material (MTC / MXene), a preparation method and application of the mannose / trimethyl chitosan modified MXene material in prevention and treatment of inflammatory bowel diseases. The MTC / MXene material is obtained by preparing mannose-modified trimethyl chitosan and modifying the mannose-modified trimethyl chitosan on a single-layer MXene nanosheet, compared with a pure MXene material, MTC modification endows MXene with hydrophilicity, rich reaction sites are provided for drug loading, higher oxidation resistance is achieved, meanwhile, through surface functional groups and interlayer gaps of the MXene material, the MXene / MTC / MXene material can be used for preparing the drug, and the drug loading efficiency is improved. Different types of drug molecules are loaded and are used for realizing targeted delivery and controlled release of drugs.

The invention discloses a planting method for promoting growth of eucalyptus root systems and effectively improving typhoon resistance. The planting method comprises the following steps: (1) selecting a forest land; (2) forest land cleaning; (3) planting density; (4) digging planting pits; (5) applying a bottom-layer bag-controlled slow-release fertilizer; (6) applying a base fertilizer; (7) field planting; (8) applying a shallow-layer bag-controlled slow-release fertilizer; (9) complementary planting; and (10) topdressing. According to the technology, bag-controlled slow-release fertilizers with different slow-release time are applied in different places, nutrients are continuously supplied to plants under deep root systems and around shallow root systems within a certain time range, volatilization, leaching loss and permeation of nitrogen fertilizers, fixation of phosphate fertilizers and migration loss of potash fertilizers can be reduced to the maximum extent, and the utilization rate of the fertilizers is increased. Meanwhile, through the fertilizer taxis of the eucalyptus root systems, extending growth of deep root systems and shallow root systems is guided, the grabbing and attaching force of the eucalyptus is improved, and therefore the typhoon resistance of the eucalyptus is effectively improved.

The invention discloses a convenient-to-adjust welding workstation for hardware machining, and relates to the technical field of adjusting welding, the convenient-to-adjust welding workstation for hardware machining comprises an equipment frame, a welding mechanism is fixedly mounted on the outer wall of the equipment frame, a first motor is fixedly mounted on the surface of the equipment frame, and the convenient-to-adjust welding workstation for hardware machining further comprises a clamping device; wherein the clamping device comprises a rotating rod, a fixing plate, a rotating pipe, an electric push rod, a clamping plate, a large gear, a second motor, a connecting rod, a circular plate and a small gear, and the rotating rod is fixedly installed at the output end of the first motor. The hardware is fixed in the welding process, the situation that the hardware is damaged due to the fact that the hardware shakes in the welding process and falls off can be prevented, meanwhile, the non-welded side is rotated, the hardware can be adjusted to the optimal position more easily, and unnecessary torsion and stretching are reduced.

The invention discloses a slow-release phosphorus removal material and a preparation method and application thereof, and belongs to the technical field of sewage treatment, the slow-release phosphorus removal material comprises the following components by mass: 40-55 parts of calcium peroxide, 25-35 parts of a binder, 2-5 parts of bentonite, 5-20 parts of calcined oyster shell powder, and 10-25 parts of iron-loaded modified red soil; the binder is prepared from Portland cement, polyacrylic acid and hydroxypropyl methyl cellulose ether according to the mass ratio of 1: (0.2 to 1): (0.1 to 0.8). Under the synergistic effect of the calcium peroxide, the binder, the bentonite, the calcined oyster shell powder and the iron-loaded modified red soil, the filter material can be used as a phosphorus removal filter material, can be directly used as a filter material of a filter tank, a wetland and the like independently or in combination with quartz sand, gravel and other filter bed filter materials, can permanently remove phosphorus in surface water, can also be directly put into rivers, lakes and ponds, and can be used as a filter material of a filter tank, a wetland and the like. In addition, the preparation cost is low, and wide application prospects are achieved.

The invention provides a cow dung organic controlled-release fertilizer and a preparation method thereof. The preparation method comprises the following steps: preparing porous cow dung biochar; preparing a cow dung organic fertilizer; uniformly mixing and stirring the porous cow dung biochar, the natural fibers in the treated cow dung and the cow dung organic fertilizer, and extruding and granulating in a granulator at normal temperature; drying to obtain the composite porous cow dung biochar with the sea urchin structure; preparing a hydrogel membrane solution, soaking the composite porous cow dung biochar with the sea urchin structure in the hydrogel membrane solution, and drying to obtain the cow dung organic controlled-release fertilizer. The cow dung organic controlled-release fertilizer formed by wrapping the cellulose hydrogel film layer with the composite porous cow dung biochar with the sea urchin structure is adopted, the porous cow dung biochar retains organic matter and nutritional ingredients in cow dung, and meanwhile moisture and pathogenic microorganisms are reduced through the carbonization process; the organic fertilizer is suitable for release and utilization of long-acting nutrient substances, the cow dung organic fertilizer is slowly released and utilized firstly, and the cow dung biochar is released and utilized for a long time.

The invention discloses a diselenide-bond-containing poly-beta amino ester carrier for mRNA delivery and a preparation method and application thereof, and the preparation method of the diselenide-bond-containing poly-beta amino ester carrier comprises the following steps: taking a synthesized diselene-1, 6-hexanediol diacrylate monomer (DSEDA) and hydrophobic amine as raw materials to react to obtain a product as a polymer intermediate; the raw material of the hydrophobic amine is one of C8, C12 and C16; the # imgabs0 # hydrophilic amine raw material is one of 2A1, 2A4 and 2A5; a diselenide bond is introduced into a main chain of the structure of the synthesized linear cationic polymer product, tertiary amine N capable of being protonated into cations exists in the main chain structure, and the tertiary amine N can be effectively combined with nucleic acid with negative charges through electrostatic interaction, so that the nucleic acid loading rate is increased; according to the invention, hydrophobic alkane chains with proper number and length are provided, a hydrophobic cavity can be formed when the nanoparticles are formed, the stability of the nanoparticles is improved, and the nanoparticles have good application in delivery of mRNA (messenger Ribonucleic Acid) molecules.

This invention discloses a method for constructing a biological model of tertiary lymphoid structures, which can rapidly and efficiently induce the generation of in situ TLS, without relying on specific tissues or organs, and without the need for complex and expensive preparation processes such as cell editing and transgenic mice. It can generate stable, mature, and long-lasting TLS structures within 2 to 3 weeks, and has the characteristics of short cycle, low cost, simple operation, reproducibility, safety and effectiveness.

The invention belongs to the technical field of two-way cartridge valves, and particularly relates to a large-flow two-way cut-off two-way cartridge valve based on quantitative control, which comprises a main valve, a pilot electromagnetic valve, a cover plate, a first one-way valve and a second one-way valve, the main valve comprises a main valve sleeve, a main valve core, a main valve spring and a cover pad; the pilot electromagnetic valve comprises a pilot valve sleeve, a pilot valve element, a pilot reset spring, a pilot cone valve element, an armature, a threaded sleeve and a coil. A first working opening and a second working opening are formed in the side face and the bottom of the main valve respectively, the main valve element is arranged in an axial hole of the main valve sleeve, the cover gasket is arranged at one end of the main valve sleeve, the main valve spring is arranged in an inner hole of the main valve element, and the cover plate is fixedly installed at the upper end of the cover gasket. The device solves the problem that the quantitative release effect is influenced by low release amount precision during quantitative release due to the fact that an existing two-way cut-off two-way cartridge valve is large in leakage after being used for a long time, cannot play a role in pressure maintaining and is slow in response time.

The invention relates to a pH responsive polymer nano-micelle as well as a preparation method and application thereof. The pH-responsive polymer nano-micelle based on a polyethylene glycol unit and a diisopropylamino unit forms a compact nano-micelle protection perfume in the storage process, fundamentally solves the problem of poor stability of the perfume, and when the pH value is lower than the critical pH value, the stability of the perfume is greatly improved due to the accurate switching performance in the use process. The effect of controlling the release of the perfume is achieved through the depolymerization of the compact nano-micelles; meanwhile, the perfuming agent has excellent universality, meets the requirement for precise release of different perfumes under different environmental conditions, and is suitable for various perfuming products such as hydrophilic daily cosmetics, cleaning products and indoor air fresheners. Compared with the prior art, the amphiphilic block polymer has the advantages that the stability and the selectivity of the amphiphilic block polymer are improved, and the high sensitivity and the precise controlled release performance of the amphiphilic block polymer as a nano-micelle are also improved.

The invention relates to preparation of an intelligent self-repairing iron-nickel-based corrosion-resistant alloy material, which comprises the following steps: synthesis of acrylic resin, preparation process of microcapsules, pretreatment of a magnesium alloy substrate, preparation of an acrylic resin coating, preparation of an electro-deposition iron-nickel alloy, preparation of a precursor ceramic repairing agent, and preparation of the intelligent self-repairing iron-nickel-based corrosion-resistant alloy material. An electrodeposition method, a solution polymerization method and a coating preparation method are creatively combined, the prepared intelligent self-repairing iron-nickel-based corrosion-resistant alloy material is a high-strength and high-hardness alloy material, and the intelligent self-repairing iron-nickel-based corrosion-resistant alloy material has the advantages of self-repairing function, corrosion resistance, wear resistance and high hardness.

The invention discloses a pH-sensitive coaxial nanofiber membrane loaded with enoxacin as well as a preparation method and application of the pH-sensitive coaxial nanofiber membrane. The electrostatic spinning nanofiber membrane is composed of a shell layer and a core layer, the shell layer comprises ethyl cellulose and Eudragit L100, the core layer comprises ethyl cellulose and enoxacin, and the electrostatic spinning nanofiber membrane is prepared through the electrostatic spinning technology. Results show that the coaxial nanofiber has a good core-shell structure, is good in water absorption, can keep a wound surface wet, has certain tensile strength, is obvious in in-vitro bacteriostasis, and can effectively promote healing of the wound surface and revascularization. The research hot spot in the field of materials is creatively applied to a pharmaceutical preparation delivery system, the prepared pH-sensitive electrostatic spinning nanofiber membrane is used for tissue regeneration and repair, and a good effect is achieved in animal experiments. The defect that an existing wound field depends on a traditional treatment means is overcome, and a basis is provided for existing industrial production.

The invention relates to a method for constructing a membrane-free compartment in a cell-free system containing exogenous nickel ions, which comprises the following steps of: constructing a protein expression vector containing a histidine tag (His Tag), introducing the protein expression vector into an expression host, and adding protein obtained by expression and purification into the cell-free system containing the exogenous nickel ions to directly form a protein enrichment phase, namely the membrane-free compartment. The biosynthesis of the quantum dots can be promoted in the zone chamber, the biological enzyme with the histidine tag can be recruited in a high-specificity manner, the enzyme digestion reaction is completed in the zone chamber, and the substances are controllably released.

The invention discloses humic acid-based coated slow-release potassium chloride and a preparation method thereof, and belongs to the technical field of biological slow-release organic and inorganic fertilizers. The fertilizer comprises the following raw materials in parts by weight: 40-55 parts of potassium chloride, 6-8 parts of humic acid, 6-9 parts of urea, 0.5-0.8 part of trace elements and 3.5-5.5 parts of a slow-release porous coating material. According to the invention, ethylenediamine and maleic anhydride are used as raw materials to prepare a functional monomer containing carboxyl and amino groups at the same time, an effective coating material enables the potassium fertilizer to release potassium ions in soil more slowly and uniformly, and the utilization efficiency of potassium is improved. The sustained-release potassium chloride disclosed by the invention has an extremely strong potassium chloride sustained-release effect on one hand, provides sufficient potassium for crops, and can effectively regulate the ecological activity of soil and improve the utilization rate of the potassium on the other hand.

The invention discloses a preparation method of anti-cracking and anti-corrosion concrete, and relates to the technical field of concrete. According to the invention, kitchen residues, cement and fly ash are used as raw materials, heat treatment is carried out, semi-carbonization is realized, an aggregate-like filler with apparent strength and certain internal toughness is obtained, the anti-cracking effect of concrete is improved, and then secondary activation and secondary grinding modification are carried out to obtain a hydroxylated ultrafine filler containing an inorganic corrosion inhibitor. The release of the inorganic corrosion inhibitor can be effectively controlled, and the anti-corrosion effect of the concrete is realized; then, after the pre-emulsion precursor is preliminarily mixed with coarse and fine aggregates, cement, superfine filler and other raw materials are added, the pre-emulsion precursor forms a tough net-shaped structure in the concrete, the crack resistance of the concrete is further improved, meanwhile, the superfine filler is adsorbed on the surface of the net-shaped structure and is self-stacked, the net-shaped structure is gradually expanded, and the crack resistance of the concrete is improved. The anti-corrosion performance and the anti-cracking performance of the concrete are further improved.

This invention discloses a slow-release fertilizer suitable for lateritic soils in Hainan, comprising a fertilizer core and a coating layer; the fertilizer core comprises the following raw materials in parts by weight: 10-20 parts isobutylene diurea, 1-3 parts 3,4-dimethyl-1H-pyrazole dihydrogen phosphate, 1-3 parts dicyandiamide DCD, 20-30 parts humic acid, and 30-50 parts organic fertilizer; the coating layer comprises the following raw materials in parts by weight: 5-10 parts natural nanotube halloysite, 3-5 parts bentonite, 5-10 parts cyclodextrin, 1-3 parts polyglutamic acid, 1-3 parts wood vinegar, and 5-10 parts polyacrylamide. The isobutylene diurea, humic acid, and organic fertilizer of this invention can effectively replenish organic matter and nitrogen in iron-aluminate soil, maintain soil nitrogen levels, and effectively control the conversion of ammonium nitrogen to nitrate nitrogen in lateritic soil, thereby reducing nitrogen loss and achieving a stable supply of nitrogen. In addition, polyglutamic acid and polyacrylamide have strong water retention capacity, and the fertilizer core is coated with a coating layer to achieve slow release and water retention.

The invention belongs to the technical field of sealing materials, and particularly relates to a sealing material with oxygen uptake and a preparation method and application thereof. The oxygen-absorbing sealing material comprises a base material and a modified active substance, the modified active substance comprises a core material active substance and a wall material coating the core material active substance; the core material active substance comprises at least one of a polyhydroxy compound active substance, a catechol active substance, a persulfate active substance, an iron active substance, a hydrogenation catalyst active substance and an enzyme active substance. According to the invention, the core material active substance is included by the wall material, so that the modified active substance is uniformly dispersed in the base material, the thermal stability of the core material active substance is obviously improved, the problems of easy inactivation and instability of the core material active substance are improved, and the sealing material has good transparency and oxygen uptake.

This invention provides a dressing containing Ligusticum striatum microspheres and its preparation method, to solve the problem of safe and precise application of Ligusticum striatum extract or Ligustrazine in difficult-to-heal wounds; the dressing containing Ligusticum striatum microspheres and its preparation method, wherein the dressing is composed of Ligusticum striatum microspheres loaded with pHEMA hydrogel as the main body, wherein the Ligusticum striatum microspheres are formed by coating Ligusticum striatum extract or Ligustrazine with PLGA, and the pHEMA hydrogel partially encapsulates the Ligusticum striatum microspheres.

The invention discloses a nasal cavity coated drug-loaded stent and a preparation method thereof, and relates to the technical field of nasal cavity stents.The coated drug-loaded stent comprises a coated drug-loaded stent body and a drug coating covering the surface of the coated stent body, and the drug coating comprises a therapeutic drug and a carrier thereof; the carrier comprises a first polymer and a second polymer which have different drug loading functions; and a tissue regeneration guide layer can also be arranged on the medicine coating. The coated drug-loaded stent provided by the invention not only has a large wound surface contact area, but also can effectively regulate and control the drug release period, so that the drug release during the wound surface repair period is more stable, long-acting and controllable, thereby meeting the needs of nasal cavity wound surface repair.

The invention discloses a production process of an oral remodeling stem cell product, and relates to the field of fish culture. The production process of the oral remodeling stem cell product comprises the four steps of extraction, mixing, granulation and filling. The production process of the oral remodeled stem cell product has the following beneficial effects: the water solubility is improved: through nanocrystallization, the water solubility of dihydroquercetin is remarkably improved, so that the absorption and utilization rate of dihydroquercetin in a living body are enhanced; the controlled release characteristic is that the nanoparticles can realize controlled release in vivo, so that the drug effect lasting time is prolonged, and the side effect is reduced; the adopted preparation process optimizes the thermal stability and antioxidant stability of dihydroquercetin, and prolongs the shelf life of dihydroquercetin; compared with a traditional medicine solubilizing technology, the adopted nanotechnology simplifies the production process and reduces the production cost; wide application potential: the unique performance of the nano particles enables the nano particles to have application potential in various products.

The invention discloses a phosphogypsum harmless curing and stabilizing treatment method which comprises the following steps: step 1, adding a curing agent into a fly ash material or a cement material, and uniformly stirring and mixing to prepare an additive A; 2, taking kaolin, adding an additive A into the kaolin, and uniformly stirring and mixing to prepare a mixture B; 3, adding ardealite into the mixture B, uniformly stirring and mixing, and adding water in the mixing process to prepare a blank; fourthly, the blank is subjected to mold pressing, and a blank mold is manufactured; and fifthly, the blank mold is dried, and a finished building material product is obtained. Compared with the prior art, the phosphogypsum curing agent can enable phosphogypsum to achieve harmless and curing stable effects.

The embodiment of the invention discloses a mine hard rock roadway tunneling blasting lumpiness control method, relates to a mine roadway blasting tunneling technology, and can effectively control the size of rock lumpiness after blasting. The method comprises the following steps: after blasting, measuring and analyzing the lumpiness of a muck pile, analyzing reasons for generating large rocks, and determining generation positions of blasting large blocks; for the blast hole with the large block area, a charging structure that the hole bottom is continuously charged and the hole opening is alternately charged is adopted for charging; after charging is completed, a multipoint detonation technology is adopted, orifices and bottoms of blast holes in a large area are detonated at the same time, superposition of multipoint stress waves is achieved, and the rock fragmentation lumpiness is improved.

The utility model discloses an inflator for inflating product belongs to inflating device technical field, and it includes the cylinder, the inflator and the piston structure. Its innovation lies in setting up the oil absorption cotton structure, and this oil absorption cotton can be installed in two positions: one is on the piston structure, and specifically can be set in the positioning groove of piston or the annular groove specially, is located the rubber ring inside, two is the bottom of the cylinder. The piston structure includes the support disc with the positioning groove and the annular groove and the rubber ring with the inverted L type section. The oil absorption cotton can be annular or circular, and can be provided with tail strip to facilitate replacement. The utility model prolongs the service life of inflator, improves the inflating cleanliness through the effective adsorption and slow -release lubricating oil of oil absorption cotton, reduces the friction wear and oil spill, is especially suitable for the product such as inflating toy.

The present application relates to the technical field of medical devices, in particular to a wound debridement device for blood tumor patients, comprising a handle vertically arranged, an injection part, an adsorption part and a mounting part for clamping medical cotton, the lower end of the handle is provided with a placing cavity, the mounting part is arranged in the placing cavity, the injection part comprises a first cylindrical cavity, a first button, a vertical slide and a first flow channel arranged in the handle, the mounting part comprises a fixing block arranged in the placing cavity and detachably connected with the handle, when the medical cotton is clamped on the handle by the fixing block, part of the medical cotton extends out of the lower end of the handle through the center hole of the fixing block, and the adsorption part comprises a second cylindrical cavity, a second button and an adsorption channel arranged vertically. The present application is simple and fast in operation when debriding the wound of the patient, greatly shortens the debridement time and reduces the labor intensity of medical staff, simultaneously reduces the time of exposing the wound of the patient to the outside, reduces the risk of wound infection and improves the wound healing speed.

The utility model relates to an artificial valve anchoring device, a delivery system and a transcatheter heart valve replacement system, the device can radially collapse and expand between a radial collapse structure and a radial expansion structure, and the device comprises a skirt edge part, a main body part and a plurality of connecting pieces; the skirt edge part extends outwards in the radial direction in an umbrella disc shape, and the small-diameter end of the skirt edge part is connected with the main body part; the main body part comprises a plurality of grid units which are connected with one another; the connecting piece is arranged at the far end of the skirt edge part and used for being connected with a conveying device. At least part of the section of the connecting piece is configured to be an elastic deformation section, the elastic deformation section can be in a straightened state in a conveying state and gradually recover to be in a preset nonlinear shape in a release state, and gradual release of the artificial valve anchoring device can be achieved through gradual deformation of the elastic deformation section.

The utility model provides an aluminum profile spraying device. The aluminum profile spraying device comprises a machining box fixedly installed on the workbench, a partition plate is fixedly installed in the machining box, and the interior of the machining box is partitioned into a spraying cavity and an operation cavity through the partition plate; the humidity sensor is mounted in the operation cavity; the water tank is fixedly mounted at the top of the processing box, and a water pump is fixedly mounted in the water tank; and the water drainage pipe is fixedly installed at the top of the operation cavity, and the water drainage pipe is fixedly connected with the water drainage end of the water pump. The aluminum profile spraying device has the advantages that accumulation and release of static charges are controlled by controlling the environment humidity, and static removal treatment on aluminum profiles is facilitated.

The invention relates to the technical field of soil treatment, in particular to an improvement method for improving acid and fertility of red soil cultivated land. According to the improvement method, a red soil cultivated land modifier is adopted for improvement, and the red soil cultivated land modifier is obtained by cross-linking sulfonated acetone grafted lignin and epichlorohydrin on the surface of quick lime, dipping in a dipping solution prepared from magnesium chloride, calcium chloride and methanol, drying and grinding. The red soil cultivated land modifier adopted in the improvement method shows an excellent effect on adjusting and maintaining soil acid-base balance, and a feasible and efficient solution is provided for red soil improvement and crop cultivation.

The present disclosure provides an ibuprofen controlled-release tablet and a method for preparing same. The controlled-release tablet is composed of a drug-containing immediate-release layer and a drug-containing sustained-release layer, wherein a mass of the ibuprofen in the drug-containing sustained-release layer is greater than a mass of the ibuprofen in the drug-containing immediate-release layer, and a ratio of the mass of the ibuprofen in the drug-containing sustained-release layer to the mass of the ibuprofen in the drug-containing immediate-release layer is ≤7. The tablet of the present disclosure has an effective analgesic effect for 24 h after administration.

The invention discloses a control method and device in a game, electronic equipment and a readable storage medium, and the method comprises the steps: displaying at least part of a virtual scene of the game through a graphical user interface, and the virtual scene comprises a virtual item controlled by a first virtual character; in response to a release operation for the virtual item, when the release operation is kept, displaying an information panel through a graphical user interface, and displaying a track projection identifier corresponding to a predicted release track on a preset plane when the virtual item is to be released in the information panel; when the virtual obstacle exists in the to-be-released release direction of the virtual prop, displaying an obstacle projection identifier corresponding to the virtual obstacle on a preset plane in the information panel; the track projection identifier and the obstacle identifier are used for indicating a release state in which the virtual prop is to be released to the virtual obstacle. According to the method, the player can more accurately control the virtual item to be released.