151 results about "Spongilla" patented technology

The invention discloses a composite bio-based suspension purification system based on a near-natural water ecology concept, and belongs to the technical field of water ecology diversity restoration. The system is composed of an emergent aquatic plant ecological design module, a bio-based suspension core, a microorganism cultivation bed, an intelligent underwater oxygenation and aeration module, an artificial ecological fish reef and a submerged plant planting module. Wherein the bio-based suspension core is of a four-layer gradient composite structure and comprises a polyester fiber filler layer, an active carbon fiber sponge layer and a palm fiber bio-base layer, and synergistic purification of physical adsorption, chemical degradation and biological metabolism is achieved. The intelligent aeration module dynamically regulates and controls the aeration intensity through multi-parameter sensor linkage and a fuzzy PID algorithm, and the oxygen transfer efficiency is larger than or equal to 35%. According to the invention, through coupling design of aperture gradient distribution (80-92% porosity) of the four-layer gradient bio-based suspension core and a dynamic response threshold value of a fuzzy PID algorithm, collaborative optimization of carrier structure parameters and control system parameters is realized for the first time. The innovative technology not only improves the stability and diversity of an ecological system, but also strengthens the natural purification capacity of a water body, and provides a new thought for water environment protection.

The tunnel waterproof structure comprises a concrete arch hole and a bottom plate arranged in an inner cavity of the concrete arch hole, an arch-shaped water blocking groove matched with the outer contour is formed in the outer wall of the concrete arch hole, and a plurality of water outlet holes are evenly formed in the inner wall of the arch-shaped water blocking groove. When the device is used, the servo motor drives the winding roller to rotate, so that the tightening belt can be tightened and loosened, when the amount of permeated water is large, the servo motor can be utilized to drive the tightening belt to be tightened and extrude the water-absorbing sponge, and the water squeezing effect on the water-absorbing sponge can be further improved under the arrangement of the arc-shaped water squeezing strip; the water absorption sponge is used for absorbing water permeating into the inner cavity of the arch-shaped water blocking groove, and then the lacing belt is used for extruding the water in the water absorption sponge out of the water outlet holes and the water drainage holes, so that the water absorption and drainage efficiency is improved, and the problem that the tunnel is poor in water permeation prevention effect is effectively solved.

The invention provides a multi-objective optimization rainwater management method based on sponge city source control, and relates to the field of data processing. In the method, underlying surface characteristics of a target area in the sponge city are obtained, and the underlying surface characteristics comprise an impervious surface, a permeable surface, permeability, an initial loss depth and a hydraulic retention depth; determining rainfall data of the target area, wherein the rainfall data comprises a plurality of design rainfall sequences and hourly intensity curves; based on the underlying surface characteristics and the rainfall data, adopting hydrology and water quality process model coupling to obtain runoff generation, permeation, storage and permeation and pollutant interception data of the target sponge facility under different rainfall sequences; and generating a spatial layout strategy of the target sponge facility in the target area by adopting a multi-target optimization algorithm according to runoff generation, permeation, storage and permeation and pollutant interception data of the target sponge facility under different rainfall sequences. By implementing the technical scheme provided by the invention, the layout strategy of the sponge facility is convenient to formulate, and the efficiency is improved.

The application belongs to the field of functional materials and surface engineering, and particularly relates to an ant nest-like photo-thermal super-hydrophobic sponge as well as a preparation method and application thereof. The preparation method comprises the following steps: repeatedly soaking melamine sponge in anhydrous ethanol solution and drying; adding dopamine hydrochloride into a tris buffer solution to obtain a mixed solution by stirring, and then immersing the surface of the dried melamine sponge into the mixed solution and drying to obtain PDA@MS; adding PDMS and a curing agent into a cyclohexane solution to stir, then adding MWCNTs, MnO2 and CuO to stir to form a mixed solution, and then spraying the mixed solution on the surface of the PDA@MS and drying to obtain PMOS; and immersing the surface of the PMOS into a mixed solution of ethanol and deionized water containing PFOTES, and then taking out and drying. Through fine cross-scale multi-layer gap structure design, high mechanical durability, excellent light absorption capacity, efficient anti-icing, de-icing, interface evaporation and fresh water production in extreme environments are realized.

This invention relates to the field of coating technology, and discloses a deep-sea pressure-resistant hull protective coating and its preparation method, comprising the following steps: substrate treatment, sequentially adding epoxy resin-modified polyurethane, reinforcing filler, anti-corrosion filler, curing agent and solvent in a predetermined proportion and mixing evenly to obtain a primer, and spraying the primer onto the substrate; then using isoxazole-modified polyurea as a topcoat, spraying the topcoat on the side of the primer away from the substrate to obtain the protective coating. This protective coating has excellent waterproof performance, impact resistance, wear resistance and anti-bioadhesion ability, and can effectively prevent water, various corrosive factors such as ions in seawater, and various polluting organisms in seawater such as barnacles, mussels, oysters and sponges from contacting the substrate surface.

The invention discloses a mesoporous biological ceramic filter sponge as well as a preparation method and application thereof, and belongs to the technical field of water treatment and air purification. The filtering sponge adopts a three-layer composite structure and comprises a three-dimensional porous sponge framework, a mesoporous ceramic transition layer and a nano metal thorn functional layer. Microorganism inactivation is achieved through a unique'adsorption-locking-puncturing 'physical mechanism, the inactivation rate of bacteria and viruses exceeds 99.9% under the condition that no chemical agent is used, meanwhile, heavy metal pollutants can be selectively removed, and beneficial mineral substances are reserved. The filtering sponge has the advantages of high porosity, large specific surface area, long service life and the like, and can be widely applied to the fields of drinking water treatment, sewage treatment, air purification and the like.

The invention provides a sponge city river ecological environment comprehensive treatment and later maintenance intelligent management and control platform, and relates to the technical field of urban water environment treatment. Comprising an Internet of Things sensing layer, the Internet of Things sensing layer is composed of a water quality sensor, a flow monitor and a meteorological station, the multistage ecological purification module comprises a front sedimentation tank, an ecological floating island unit, a biological filter and an artificial wetland, the ecological floating island adopts a modified polyethylene base material to plant stain-resistant aquatic plants, and a biological filler is suspended at the bottom of the floating island; and the intelligent management and control system integrates a dynamic water quality model and an AI algorithm, automatically regulates and controls the aeration equipment, the ecological water replenishing valve and the agent adding device according to real-time data, and realizes dissolved oxygen balance and pollutant reduction of the river channel. Dynamic regulation and control of water quality are achieved through the Internet of Things sensing layer and the AI prediction model, the total nitrogen removal rate is stabilized to be 75% or above, the runoff coefficient in the rainstorm period is reduced to 0.45, and 95% of suspended solids are intercepted.

The utility model relates to an optimization device convenient for dry land soil ammonia volatilization collection. The optimization device convenient for dry land soil ammonia volatilization collection comprises a collection base, a gas collection pipe and a rain shielding roof, the inner diameter of the collecting base is matched with the outer diameter of the gas collecting pipe, the gas collecting pipe is installed on the upper side of the collecting base, a sponge support is arranged in the gas collecting pipe, a sponge soaked with phosphoglycerol is arranged on the sponge support, a vent hole is formed in the top of the side wall of the gas collecting pipe, and a rain shielding top is arranged above the gas collecting pipe. A limiting horizontal outer ring is arranged on the outer side of the top of the collecting base. According to the invention, sampling can be completed quickly and conveniently, the sampling accuracy is ensured, the operation difficulty and test errors caused by human factors are reduced, the monitoring accuracy is increased, the price is low, and operation and carrying are convenient.

The invention discloses an interface evaporation seawater desalination device based on an armor Janus structure and a preparation method, and relates to the technical field of seawater desalination devices.The device comprises a black copper net frame and a carbon nano tube sponge, the carbon nano tube sponge is filled in the black copper net frame, the black copper net frame is made of a super-hydrophobic material, and the carbon nano tube sponge is filled in the black copper net frame. The carbon nanotube sponge is made of a super-hydrophilic material; the super-hydrophilic carbon nanotube sponge on the inner layer can quickly adsorb and transmit seawater by virtue of excellent hydrophilicity and a porous network structure, and a water micro-channel penetrating through the whole body is efficiently constructed; the super-hydrophobic black copper net on the outer layer is like a protective barrier, and the super-hydrophobic characteristic of the surface of the super-hydrophobic black copper net can remarkably reduce the adhesive force between seawater and the net surface, so that salt crystals possibly separated out in the evaporation process are difficult to adhere to the surface of the super-hydrophobic black copper net, and the problem of interface blockage caused by accumulation of the salt crystals is effectively avoided.

The invention belongs to the technical field of directional hole sponge body preparation, and particularly discloses a preparation method and application of a directional hole sponge body. The preparation method comprises the following steps: cross-linking aminated silane and carbon nanotubes, and forming directional holes by using a directional heating method; the surface of the sponge is further coated with a photo-thermal conversion functional layer and a hydrophobic layer, and the directional hole hydrophobic sponge with the photo-thermal conversion effect is obtained. The obtained sponge has hydrophobicity and rebound resilience, can selectively adsorb oil in water, has an excellent adsorption rate, can be recycled for multiple times by using a physical compression method, and has a good application prospect in the field of oil-water separation.

The invention belongs to the technical field of microalgae biological culture, discloses a method for promoting growth of nostoc by efficiently utilizing a nitrogen source through solid-liquid culture, and aims to solve the problems of low nitrogen source utilization rate and slow biomass accumulation in the conventional culture technology. The method is based on a closed photobioreactor with gas-liquid circulation, and comprises the following steps: preparing a nitrogen-free BG11 culture medium; coating nostoc on the surface of the sterilized porous hydrophilic sponge; placing the sponge in a reactor, and adding the culture medium until no accumulated water is infiltrated; after closing the reactor, controlling the temperature, lighting and other conditions, continuously / intermittently supplementing nitrogen and maintaining certain positive pressure, and circulating the culture medium to supplement nutrition; and taking the sponge after the culture is finished. The utilization rate of a nitrogen source is remarkably increased, the biomass obtained through culture is remarkably increased, culture conditions are stable, and the method is suitable for large-scale development of nostoc and development of high-added-value products.

The application discloses a synchronous denitrification and dephosphorization rainwater biological retention facility capable of simultaneously coping with heavy rainfall, relates to the technical field of sponge city construction, and comprises a pool body, wherein an overflow layer, a covering layer, a filter layer, an upper drainage layer, a biochar layer, a submerged layer and a lower drainage layer are sequentially arranged in the pool body from top to bottom; the upper drainage layer and the lower drainage layer are each provided with a drainage pipe; the water outlet of the lower drainage pipe is lifted to be flush with the top of the submerged layer; the submerged layer comprises iron shavings and quartz sand materials; an overflow well is arranged in the pool body; the water outlets of the upper drainage pipe and the lower drainage pipe are both connected into the overflow well; a water level control valve is arranged in the pool body and used for controlling the opening and closing of the water outlet of the upper drainage pipe. The application can automatically adjust the water outlet path according to the rainwater flow, overcomes the problem that dissolved oxygen in rainwater runoff breaks through the submerged layer and reduces the denitrification and dephosphorization performance of the facility under the condition of heavy rainfall, improves the removal capacity of the facility for dissolved pollutants, and has a longer service life.

The present application relates to the field of aquaculture circulating seawater purification, and particularly relates to a preparation method of an efficient bacteria-algae composite biofilm for aquaculture circulating seawater, comprising the following steps: (1) water preparation: adding aquaculture circulating water and adding nutrient salt in an aquaculture biochemical tank, and adjusting pH and permanganate index; (2) adding modified carrier filler: adding modified hydrophilic wavy arc surface material to a primary biochemical tank, and adding modified hydrophilic polyurethane sponge to a secondary biochemical tank; (3) biofilm formation: keeping seawater circulation in the primary biochemical tank, keeping seawater circulation and aeration in the secondary biochemical tank, and cultivating under illumination until biofilm formation is completed. The chemical oxidation carrier filler is used in the present application, the surface roughness is increased and the hydrophilic group is generated, the hydrophilicity is preliminarily improved, the graphene oxide is further used to improve the hydrophilicity, the microorganisms are beneficial to gather and adhere to the carrier filler to form a relatively firm biofilm, the biofilm formation time is greatly shortened, and the nitrogen content in the aquaculture circulating seawater can be stably and continuously degraded.

The application belongs to the field of sponge production equipment, and particularly relates to a safe and environment-friendly sponge product forming equipment, which comprises a stirring device, the lower part of the outer surface of the stirring device is movably connected with a forming box, the lower surface of the forming box is uniformly provided with adjusting support legs, the forming box comprises an outer box shell, the inner wall of the outer box shell is slidably connected with an adjusting frame, the shaft center of the upper surface of the adjusting frame is provided with a through hole, and the shaft center of the upper surface of the adjusting frame is rotatably connected with a sealing cover through the through hole. In the process of sponge expansion, the bottom plate covers the upper surface of the sponge block under the action of gravity, so that the outer surface of the produced sponge block is relatively flat as a whole, almost no cutting processing is needed, waste phenomenon caused by direct scrapping of cutting edges and corners is avoided, the expansion speed of the sponge block is limited, sponge block internal structure is prevented from being too loose due to too fast expansion of the sponge block.

The invention discloses an antistatic antibacterial seaweed carbon-based sponge and a preparation method thereof, and belongs to the technical field of sponge materials, graphene is deposited on the surface of seaweed carbon to obtain graphene / seaweed carbon, gel with antibacterial performance is loaded on the surface of the graphene / seaweed carbon, and a functional complex with a core-shell structure is cross-linked in the gel structure to obtain the antistatic antibacterial seaweed carbon-based sponge. The gel can be endowed with excellent strength, so that the gel has good, stable and long-term photocatalytic property, and can cooperate with the seaweed carbon to exert antibacterial property and avoid bacterium breeding; the functional complex has good photocatalysis and can cooperate with the antibacterial property of the seaweed carbon and avoid bacterium breeding, the gel has pH responsiveness, when the pH value is increased due to increase of skin sweat, the gel swells, the absorption of the fabric to sweat is enhanced, and stuffiness, stickiness and greasiness are avoided; when the skin is dry and the gel shrinks, the dry and comfortable touch feeling of the fabric is kept, and small defects existing in graphene and seaweed carbon can be effectively overcome through the water absorption swelling effect of the gel.

The utility model discloses a plug-in type large sponge structure which is characterized in that a long-strip-shaped cavity is formed in a peripheral sponge body in the length direction in a penetrating mode, the peripheral sponge body is located at the two ends of the long-strip-shaped cavity and extends outwards in the section direction to be provided with clamping grooves, and an inner side sponge body is inserted into the long-strip-shaped cavity of the peripheral sponge body. According to the utility model, the structure is reasonable, the inner side sponge body can be inserted into the long-strip-shaped cavity of the peripheral sponge body during conveying or transportation, and respective transportation or conveying is not needed, so that the convenience is greatly improved, the transportation cost is reduced, and the transportation efficiency is improved. Due to the fact that the peripheral sponge body and the inner side sponge body are separated, the follow-up machining difficulty and procedure steps are reduced, the clamping grooves are formed in the two ends of the long-strip-shaped cavity respectively, the limiting sponge bodies are arranged at the clamping grooves, and it is guaranteed that the inner side sponge body cannot be separated from the peripheral sponge body in the transportation process.

The present invention provides a hemostatic porous sponge comprising a matrix of a fibrous biomaterial and particles of a fluid absorbing, particulate material adhered to said matrix material, a method of producing these sponges and their use for wound healing.

The application discloses a kind of composite biological base suspended purification systems based on near natural water ecological concept, belong to water ecological diversity restoration technical field.The system is composed of emergent plant ecological design module, biological base suspended core, microbial cultivation bed, intelligent underwater oxygenation aeration module, artificial ecological fish reef and submerged plant planting module.Biological base suspended core adopts four-layer gradient composite structure, including polyester fiber filler layer, activated carbon fiber sponge layer and palm silk biological base layer, realize physical adsorption, chemical degradation and biological metabolism synergistic purification.Intelligent aeration module is linked through multi-parameter sensor and fuzzy PID algorithm dynamically controls aeration intensity, oxygen transfer efficiency is greater than or equal to 35%.The application is coupled by the aperture gradient distribution (80%-92% porosity) of four-layer gradient biological base suspended core and the dynamic response threshold of fuzzy PID algorithm, for the first time realizes the collaborative optimization of carrier structure parameters and control system parameters.The innovation technology not only improves the stability and diversity of ecological system, but also strengthens the natural purification capacity of water body, provides a new idea for water environment protection.

The utility model relates to the technical field of drainage of sponge cities, in particular to a siphon overflow well mouth structure of a sponge city, which comprises a well mouth, an overflow port is arranged on the well mouth, the upper end of the overflow port is connected with an overflow port well seat, an overflow well cover is connected in the overflow port well seat, and at least one pipe placing groove is arranged on the upper portion of the overflow port. A U-shaped pipe is connected into the pipe containing groove, the opening portion of an external pipe section of the U-shaped pipe faces the outside of the well mouth and does not make contact with the upper face of the well mouth, and an internal pipe section of the U-shaped pipe extends into the overflow opening. A central overflow port is formed in the middle of the overflow well lid; and a prompting assembly is movably inserted into the central overflow port. The drainage device is easy to construct, low in cost and good in drainage effect, and can indicate the position of a well mouth during waterlogging disasters.

The present application belongs to the field of live transportation of aquatic products, and relates to a method for live transportation of prawns without water. The core of the method is to use a staged treatment strategy and the synergistic effect of dormancy induction liquid and moisture supply liquid. First, the prawns are adapted to the environment by fasting and gradient cooling, then they are soaked in pre-cooled dormancy induction liquid to enter a pseudo-death dormancy state and reduce metabolism. Then, the moisture supply liquid soaked sponge is used as a transportation medium, which can form a protective film on the surface of the prawn body to effectively prevent water loss and provide energy. During transportation, the prawns treated with the moisture supply liquid are placed in a sealed box filled with pure oxygen together with the moist sponge, and the prawns are transported without water at low temperature. After the transportation is completed, the prawns are placed in warm water to quickly recover. The prawn live transportation method without water prolongs the survival time of prawns in a water-free environment, improves the transportation efficiency, is simple to operate, and is suitable for large-scale long-distance transportation of prawns.

The present invention discloses a cable surface dewatering device for high-voltage power maintenance, which relates to the field of cable surface dewatering. The dewatering component includes a moving ring, the inner cavity of the moving ring is rotatably connected to a central rotating shaft, the inner cavity of the central rotating shaft is fixedly connected to a driving rod, the end of the driving rod away from the central rotating shaft is fixedly connected to a dewatering shell, and the side of the dewatering shell away from the driving rod is fixedly connected to a replacement mechanism. Through the squeezing mechanism, since water stains are stored in the sponge for a long time, the service life of the sponge is affected and it is not conducive to the next use. The squeezing rod in the squeezing mechanism moves toward the sponge under the action of a telescopic plate, and the sponge is squeezed by the squeezing rods on both sides, so that the water is discharged. At the same time, the water pump extracts the squeezed water, and the extension rod squeezes toward the sponge to process the water in the center of the sponge, so that the water in the sponge is cleaned more thoroughly. At the same time, a desiccant is provided in the inner cavity of the squeezing rod to process the air and the water on the surface of the squeezing rod, and the heater evaporates part of the water.

This invention discloses a dynamic adaptive ecological slope protection system and method suitable for reservoir bank drawdown zone slopes, belonging to the field of water conservancy engineering and ecological restoration. The system includes an anchoring system, a lifting vegetation trough, an integrated water collection system, and a linked water supply device. The anchoring system uses self-weight triggered self-locking anchors to achieve locking upon installation. The vegetation trough can freely rise and fall along the anchors with the water level, and contains a soil layer and a water-storing sponge layer. The water collection system automatically controls water flow through a float valve, and the linked water supply device relies on elastic expansion and capillary action to achieve water storage during submersion and automatic water supply during emergence. Construction adopts a bottom-up modular installation, using the floating plate of the vegetation trough as a working platform, eliminating the need for high-altitude facilities. This invention can adapt to the off-season hydrological rhythm of the drawdown zone, improving slope stability and vegetation survival rate. It requires no external energy or human intervention and has advantages such as convenient construction, low operation and maintenance costs, and eco-friendliness, making it suitable for ecological protection of reservoir and lake drawdown zone slopes.

The invention relates to an evaporator, in particular to a three-dimensional hydrophilic and hydrophobic sponge alternate trapezoidal seawater evaporator and a preparation method thereof. The invention provides a three-dimensional hydrophilic and hydrophobic sponge alternate trapezoidal seawater evaporator, which comprises three hydrophilic sponges and two hydrophobic sponges, the hydrophilic sponges and the hydrophobic sponges are alternately arranged in a trapezoidal shape, the top hydrophilic sponge forms a trapezoidal structure with height difference, the bottom hydrophobic sponge forms a groove structure, and the bottom hydrophobic sponge forms a trapezoidal structure with height difference. And two copper wires are connected and fixed in a penetrating mode through the connecting holes, and the three-dimensional trapezoid hydrophilic and hydrophobic spaced sponge evaporator is obtained. Through the design of the evaporator structure, sunlight on the upper surface of the evaporator is transmitted into the evaporator, so that a plurality of dark evaporation surfaces are formed in the evaporator, the actual evaporation area is increased, and the high evaporation efficiency is achieved under the limited illumination area.

The invention belongs to the field of high-performance oil-water separation composite materials, and particularly relates to a multifunctional super-hydrophobic melamine sponge based on a core-shell metal organic framework structure as well as a preparation method and application of the multifunctional super-hydrophobic melamine sponge. The multifunctional super-hydrophobic melamine sponge is prepared by coating the core-shell structure copper sulphide coated CuFe-MOF, polyvinyl alcohol and octadecyl trichlorosilane on a melamine sponge. The prepared sponge shows excellent hydrophobicity and efficient oil-water separation capacity, the water contact angle of the sponge is as high as 157.4 degrees, and the oil-water separation efficiency can still be maintained at 98.9% after 20 times of circulating oil absorption. The temperature of the sponge can be rapidly increased to 112.5 DEG C under simulated sunlight irradiation, and the adsorption capacity of thickened oil is remarkably improved. And the sponge also has the capability of catalyzing a photo-Fenton reaction, and can effectively adsorb pollutants in seawater. The sponge provided by the invention provides an environment-friendly and efficient new scheme for treating viscosity reduction and magnetic drive oil absorption of high-viscosity crude oil.

This invention discloses a method for constructing a "sponge" mining area in the subsidence zone of underground mining. It fully utilizes the large surface subsidence space caused by mining operations to purify, store, and utilize mine water resources, and restore the mining area's ecology. The method involves horizontally dividing the subsidence space into "purification-storage-utilization" functional zones and vertically reconstructing the soil into "isolation-conservation-nurturing" functional zones. Horizontally, the surface subsidence basin is divided into three water resource functional zones: a water purification zone, a water storage zone, and a water use zone. The water purification zone is located upstream of the gravity flow of mine water at the edge of the subsidence basin; the water storage zone is located in the center of the subsidence basin; and the water use zone is located downstream. This method not only restores mine land resources but also achieves multiple objectives, including improving the water environment, conserving water resources, restoring the aquatic ecosystem, ensuring water security, and utilizing water resources.

The application discloses a hot-press forming device for environment-friendly sponge production and belongs to the technical field of environment-friendly sponge production; the present application is used for solving the technical problem that the feeding of the sponge to be processed is uncertain, which easily causes the local area of the sponge to be processed to extend on the sealing structure between the molds, thereby causing the overall mold to have the phenomena of heat leakage and incomplete hot-pressing during the heat treatment of the sponge to be processed; the present application comprises a base frame, the top of the base frame is provided with a conveying frame, a drag chain is installed on the inner wall of the conveying frame, a feeding support plate connected with the drag chain is arranged at the top center of one end of the conveying frame, and a limiting top plate penetrating through the middle part of the conveying frame is arranged at the top center of the base frame; the present application carries out double-sealing space treatment on the early hot-pressing treatment, guarantees the hot-pressing treatment of the internal sponge and the internal locking of heat, and can also carry out qualified screening on the environment-friendly sponge after hot-pressing forming on the feeding support plate.

This invention discloses a method for preparing regenerated cellulose sponge, belonging to the field of cellulose processing technology. The invention uses a superbasic ionic liquid as a solvent to dissolve cellulose slurry, then adds a pore-forming agent, a foaming agent, and reinforcing fibers, mixes them, and proceeds with heating for foaming, anti-solvent coagulation for impurity removal, and finally chemical cross-linking with epichlorohydrin, washing, and drying to obtain the regenerated cellulose sponge. This invention features mild dissolution conditions, a stable system, and recyclable ionic liquid. Through a five-step process of dissolution, mixing, foaming, coagulation, and cross-linking, the resulting sponge has a density ≤0.11 g / cm³, a maximum wet tensile strength of 126 kPa, a water absorption rate of up to 31 times its own weight, and can be stably cyclically compressed more than 3000 times. It combines low density, high wet strength, high elasticity, and high water absorption, making it suitable for applications in cleaning, medical, and packaging fields.

The utility model discloses a drip irrigation device for recovering soil and vegetation in an arid region. The drip irrigation device comprises a header pipe, a plurality of branch pipes are distributed on the main pipe; one ends of the branch pipes away from the header pipe are connected with drip irrigation heads; the drip irrigation head comprises a spray head, the spray head is connected to the branch pipe, and a plurality of water outlet holes I are formed in the spray head; the spray head is sleeved with a shell, and a plurality of second water outlet holes are formed in the shell; and a sponge layer is arranged between the nozzle and the shell. Water is distributed into the branch pipes through the main pipe, the drip irrigation heads are connected to the ends, away from the main pipe, of the branch pipes, and the water can further flow into the spray heads of the drip irrigation heads. And a plurality of water outlet holes I and a plurality of water outlet holes II which are uniformly distributed on the spray head and the shell are used for preliminarily dispersing water. And a sponge layer is arranged between the spray head and the shell, so that external impurities can be effectively blocked, the impurities are prevented from entering the branch pipes from the water outlet holes I and the water outlet holes II, and blockage is avoided. And the water is uniformly and slowly dripped into the soil of the arid region, so that the recovery of the soil and vegetation is facilitated.

This item is a mark used for orientation during three-dimensional photo measurement, and is intended to be placed on the ground in a field where agricultural crops are grown. The item is made of a sponge-like absorbent material to prevent water droplets from remaining on the surface. Furthermore, to prevent mud from adhering to the top surface, the main body of the item is not flat or sheet-shaped, but has a three-dimensional shape with thickness in the height direction. Furthermore, the item has an identification mark on the top surface to allow identification from captured images. To improve visibility and automate work, the color of the side of the item can be changed depending on the size of the item's thickness in the height direction.

This item is a mark used for orientation during three-dimensional photo measurement, and is intended to be placed on the ground in a field where agricultural crops are grown. The item is made of a sponge-like absorbent material to prevent water droplets from remaining on the surface. Furthermore, to prevent mud from adhering to the top surface, the main body of the item is not flat or sheet-shaped, but has a three-dimensional shape with thickness in the height direction. Furthermore, the item has an identification mark on the top surface to allow identification from captured images. To improve visibility and automate work, the color of the side of the item can be changed depending on the size of the item's thickness in the height direction.