113 results about "Sea grass" patented technology

The invention discloses a dynamic sea condition ship-machine cooperative attitude control system and method for sea grass transplantation, and belongs to the crossing field of marine ecological restoration and intelligent ship control. The system comprises a mother ship attitude control layer, a communication management layer, an underwater operation end and a sensor network layer, the mother ship attitude control layer, the communication management layer, the underwater operation end and sensor network layer and the mother ship attitude control layer are sequentially connected through lines; the method integrates inertial navigation, visual measurement, event-triggered communication and adaptive filtering technologies, realizes high-precision attitude synchronization and stable operation of the ship and the underwater operation device in sea conditions of four levels and below, and can be widely applied to marine ecological engineering scenes such as seaweed bed restoration, coral transplantation and submerged vegetation reconstruction. And the operation efficiency and the environmental adaptability are effectively improved.

The utility model discloses a shallow sea seaweed planting platform and relates to the technical field of marine ecological restoration. Comprising a traction ship, an offshore platform, a mesh belt reel, a seed mesh belt, compression rollers, degradable nails and supporting rods. The traction ship is connected with the offshore platform and can drive the offshore platform to move; the mesh belt reel is fixedly mounted on the offshore platform, the seed mesh belt is wound on the mesh belt reel, and the degradable nails are used for fixing one end of the seed mesh belt on the seabed in a needle pricking manner; one end of each supporting rod is in hinged connection with the offshore platform through a fixed hinge point, so that the supporting rods can rotate around the corresponding hinge points, the supporting rods rotate in a plane, and the net belt reel and the rotating plane are coplanar; and a compression roller is arranged at the other end of the supporting rod and can rotate on the corresponding end point of the supporting rod. The planting efficiency is improved, manual operation is partially replaced, and the operation process is simplified.

The invention relates to a seawater degradable seedling raising frame and a preparation method and application thereof.The preparation method of the seawater degradable seedling raising frame comprises the following steps that (1) modified biodegradable plastic is prepared, specifically, a non-enzymatic seawater degradation accelerator, an enzymatic seawater degradation accelerator, a surface hydrolysis inhibitor and a small amount of biodegradable resin are mixed and subjected to melt extrusion, and the modified biodegradable plastic is obtained; the extrusion temperature is 140-180 DEG C, high-concentration master batches are prepared, the master batches and the remaining biodegradable resin are mixed, melt extrusion is conducted again, the extrusion temperature is 160-190 DEG C, cooling and granulation are conducted, and the modified biodegradable plastic is obtained. (2) modified biodegradable plastic is placed in an injection molding machine, heated to a molten state and then injected into a seedling raising frame mold, demolding operation is conducted after injection molding is completed, and the seawater degradable seedling raising frame is formed and can be controllably degraded to meet the requirement for the growth cycle of sea grass, is harmless to the environment and promotes recovery of a sea grass bed ecological system; sustainable marine ecological restoration is realized.

The invention discloses a bionic stingray type underwater patrol robot based on annular fin propulsion, and belongs to the technical field of underwater robots, the bionic stingray type underwater patrol robot comprises a waterproof shell, an annular flexible fin and an annular fin propulsion mechanism; the annular fin propelling mechanism comprises an annular mounting plate, a plurality of first steering engines are uniformly arranged on the annular mounting plate in the circumferential direction, fin rays extending in the radial direction of the annular mounting plate are arranged at the output ends of the first steering engines, and the fin rays are fixedly connected with the annular flexible fins; the fin ray comprises a connecting base connected with the output end of the first steering engine, and a clamping jaw used for clamping the annular flexible fin is rotationally matched with the connecting base. A traditional propeller is replaced with bionic fluctuating propulsion of the annular flexible fins, the winding risk is fundamentally avoided, the bionic fluctuating fin propulsion mode is small in water flow disturbance and low in noise, the bionic fluctuating fin propulsion device is suitable for the environment sensitive to water flow or needing hidden operation, and interference to sea grass or surrounding ecology is avoided.

The utility model discloses an ecological sea grass bed structure based on blue carbon effect, which comprises a planting bed, one side of the planting bed is provided with a fixing mechanism used for fixing the planting bed, the fixing mechanism comprises a ground nail, a connecting rod, a spiral piece, a twisting block, a fixing ring and a hook, the ground nail is arranged on one side of the planting bed, and the spiral piece is arranged on the other side of the planting bed. A connecting rod is fixedly arranged at the upper end of the ground nail, a spiral piece is fixedly arranged on the surface of the outer side of the ground nail, a screwing block is fixedly arranged on the outer surface of the upper end of the connecting rod, a plurality of fixing rings are evenly and fixedly arranged on the surface of the connecting rod and located on the periphery of the lower end of the screwing block, and hooks are fixedly arranged at the four corners of the surface of the outer side of the planting bed. The device is good in using effect, a planting bed structure for artificial sea grass planting can be conveniently and rapidly laid on the seabed, the fixing and anchoring effect of the device is better, and therefore the planting bed can be effectively prevented from displacing and deviating from the preset planting position along with flowing impact of seabed water flow.

The utility model relates to the technical field of aquaculture net cages, in particular to a net cage-based suspension type monitoring device, which comprises a netting arranged between a floating frame and a counter weight, the floating frame is fixedly connected with an upper line of the netting, a monitoring buoy is arranged at the top of the floating frame through a central floating platform, an acquisition monitoring device is arranged in the monitoring buoy, and the acquisition monitoring device is connected with the counter weight. The collecting and monitoring device comprises a monitoring lens and a collecting head connected through a collecting pipe. Wherein a filtering part is detachably connected in the collecting head through a closing assembly, the collecting head and the filtering part are used in cooperation, seawater is filtered and extracted, the underwater environment can be monitored, the collecting head and the collecting pipe and the collecting head are used in cooperation to filter and extract seawater, the underwater environment is judged in a seawater analysis mode, and the underwater environment can be monitored. And the filter part can be quickly replaced through the closing assembly, so that the filter part is prevented from losing the filtering effect due to silt and sea grass blockage and attachment after long-time use.

The invention relates to the technical field of environmental protection, in particular to a degraded sea grass bed repairing device and method based on symbiosis of microorganisms and sea grass, and the device comprises a coated seed ball and a slow release pad which is laid on a sea grass bed and provides a planting matrix for the coated seed ball; the overall density of the coated seed balls is greater than that of seawater; the coated seed ball comprises sea grass seeds, the sea grass seeds are coated with a microbial layer for promoting growth and development of the sea grass seeds, and the microbial layer is coated with a protective layer for protecting the sea grass seeds and the microbial layer. The slow release pad is net-shaped; through the design of the coated seed balls, sea grass seeds can smoothly settle to the position of a sea grass bed, meanwhile, the sea grass seeds can be protected and prevented from being damaged in the settling process, the surrounding environment is adjusted after settling is completed and before the sea grass seeds germinate, and then growth and development of sea grass are facilitated; the seaweed bed repairing effect is improved.

The invention discloses a sea grass preservative film and a preparation method thereof, and relates to the technical field of preservative film preparation. Aiming at the problems of serious pollution and difficult degradation of the existing plastic product, the invention takes sea grass and starch as core raw materials and is prepared by the steps of sea grass raw material pretreatment, extract preparation, gel mixture preparation, calcium ion crosslinking, airing and the like. The seaweed extract and the starch are subjected to synergistic interaction through hydrogen bond physical crosslinking and thermal gelation to form a stable film structure, the raw materials are food-grade, and the seaweed film has toughness and complete degradability, is free of harm to the environment and human bodies, can be widely applied to food packaging, field film covering, packaging products and other scenes, effectively replaces traditional plastic products, and solves the problem of plastic pollution.

The utility model relates to the technical field of sea grass processing, and discloses a cleaning machine for sea grass crude rubber production, which comprises a cleaning barrel, a feed port and a discharge port are arranged on the cleaning barrel, a manual valve is arranged at the discharge port, a cleaning part is arranged on the cleaning barrel, and the cleaning part comprises a rotating ring, a control panel and a motor. The motor is installed on the cleaning barrel and is in transmission connection with the rotating ring, the control panel is fixedly connected to the cleaning barrel, the rotating ring is rotationally connected to the cleaning barrel and the control panel, a cam groove is formed in the control panel, the rotating ring is rotationally connected with the movable arm and the fixed arm, the movable arm is rotationally connected with the fixed arm, and a torsional spring is arranged between the movable arm and the fixed arm. One end of the fixed arm slides in the cam groove, and one end of the movable arm is provided with a toothed plate. According to the sea grass cleaning device, sea grass in the cleaning barrel can be automatically stirred during cleaning; meanwhile, after the discharge port is opened, the sea grass can be automatically discharged, the machine does not need to be stopped or manually taken out, and the operation efficiency is improved.

The invention provides a sea grass bed monitoring method and system, electronic equipment, a storage medium and a program product. The sea grass bed monitoring method comprises the steps that a cruise path is set for a to-be-monitored target area; acquiring multi-modal remote sensing data of the sea grass bed in the target area according to the cruise path by taking the unmanned aerial vehicle as a carrier; sea grass features of the multi-modal remote sensing data are extracted; generating an evaluation result through a pre-trained evaluation model based on the sea grass features; and generating a vegetation condition report according to the evaluation result, wherein the vegetation condition report comprises a vegetation condition index. By fusing multispectral and visible light image data, comprehensively extracting spectral features and morphological features of the sea grass, and automatically generating an evaluation result by using an artificial intelligence evaluation model, the automation level and evaluation precision of sea grass bed monitoring are significantly improved, comprehensive and rapid diagnosis of the health condition of the sea grass bed is realized, and the method is suitable for popularization and application. And reliable technical support is provided for marine ecological protection and management.

The seagrass seed-planting system includes: a storage and agitation subassembly; a dispenser subassembly; and a pump subsystem. The storage and agitation subassembly: is configured to store a quantity of seagrass seeds in an aqueous environment; includes a set of fluid inlet ports configured to direct water into the aqueous environment to agitate the quantity of seagrass seeds; and defines an outlet aperture. The dispenser subassembly: is fluidically coupled to the outlet aperture; and is configured to dispense the seagrass seed into a sediment layer. The pump subsystem directs a flow of water from the storage and agitation subassembly through the set of fluid inlet ports, through the outlet aperture, and toward the dispenser subassembly.

The invention belongs to the technical field of ecological restoration and reconstruction of sea grass beds, and particularly relates to a precise sowing method for eelgrass seeds. The eelgrass seeds are placed on a cotton seed belt and wrapped, rolled and twisted to form a seed rope, then the seed rope is buried into sediment of a repaired sea area according to the sowing depth and row spacing at the sowing time, and the two ends of the seed rope are fixed through bamboo sticks. The eelgrass seeds are wrapped by the cotton seed belt and then sown on the seabed, so that the sea grass seeds are effectively prevented from being scoured by water flow and foraging by animals, the seed loss rate is reduced, the seed utilization efficiency is improved, and meanwhile, the sowing density can be flexibly adjusted by adjusting the plant spacing and the row spacing; in addition, a wrapping environment (weak reduction-weak oxidation environment) formed by slow degradation of the cotton seed belt can promote germination of the seaweed seeds.

The utility model relates to the technical field of sea grass processing, and discloses a sea grass alkali treatment device which comprises a treatment tank, a pressure intensity adjusting part and a mounting frame, the treatment tank is used for containing sea grass and alkali liquor and comprises a tank body and a tank cover movably mounted on the tank body, and a balance hole is formed in the tank body; the pressure intensity adjusting part comprises a driving set and an output set, the driving set transmits power to the output set, and the output set drives the tank cover to move in the axial direction of the tank body so as to change the pressure intensity in the tank. According to the utility model, the pressure intensity adjusting part is arranged, and high pressure and low pressure in the tank are alternately changed, so that the alkali treatment speed of sea grass is accelerated; meanwhile, continuous temperature rise caused by continuous high pressure in the tank is avoided; the output group is arranged, so that high-pressure and low-pressure switching in the tank can be continuously and stably carried out; the tank body is arranged to be the treatment tank body and the compression tank body, so that the tank cover achieves the same air pressure adjusting effect at a shorter displacement distance, and the volume occupied by the output group during working can be reduced.

One variation of a method for planting seagrass includes deploying a harvesting AUV from a deployment station within a body of water to a harvesting site containing a meadow of seagrass, and harvesting the quantity of seagrass seeds from the harvesting site. The harvesting AUV deposits the quantity of seagrass seeds and accompanying biomass into a biodegradation tank of the deployment station. At the deployment station, the quantity of seagrass seeds is isolated from the accompanying biomass in the biodegradation tank, and the quantity of seagrass seeds is loaded into a planting AUV. The planting AUV is then deployed from the deployment station to a restoration site within the body of water. The planting AUV meters the quantity of seagrass seeds into a seed depositing mechanism and deposits the quantity of seagrass seeds into a sediment bed of the restoration site utilizing water as a transport medium.

The invention relates to the technical field of plankton collection, in particular to a stepped sea grass bed plankton collection device which comprises a shell, a telescopic part, a piston cylinder and a plurality of fixing rods are arranged in the shell, the fixing rods are fixedly connected with the piston cylinder, a cross rod is arranged on an output shaft of the telescopic part, and a first piston plate is arranged on the cross rod; driving rods are arranged on the two sides of the cross rod, U-shaped rods are symmetrically arranged in the shell, the driving rods are hinged to the U-shaped rods, a connecting block is arranged below the piston cylinder, hinge blocks are hinged to the two ends of the connecting block, hinge shafts are hinged to the hinge blocks, the U-shaped rods are fixedly connected with the hinge shafts, and a collecting assembly is arranged at the bottom of the connecting block. The movement stability of the connecting block is ensured through the driving rods, the U-shaped rods, the hinge shafts and the hinge blocks which are symmetrically arranged, so that the connecting block can drive the collecting assembly to stably move up and down in the movement process, and the problem of plankton damage caused by sudden change of the movement speed is reduced.

The invention belongs to the technical field of seabed gas pipeline detection, and discloses a strait-crossing gas pipeline sonar image recognition device and a use method thereof.The strait-crossing gas pipeline sonar image recognition device comprises a sonar recognition body, a transmitting end, a receiving end and a cable, and the outer surface of the sonar recognition body is rotationally sleeved with a rotating sleeve; the receiving ends are distributed on the outer surface of the rotating sleeve in a reversing mode. Relatively flowing water flows are intermittently poured into the cleaning assembly, when the water flows are poured, the cleaning assembly is actively pushed to act, impurities such as sea grass blocked on the front face of the protection frame are cleaned out, protection and isolation of a sonar recognition body are guaranteed during actual navigation recognition detection, and meanwhile, by means of relative flowing of the water flows in navigation, the detection accuracy is improved. The device automatically acts and completes cleaning of sundries such as sea grass on the front face of the protection frame, the protection effect is guaranteed, automatic cleaning can be achieved, a power device does not need to be additionally arranged, the cleaning action is automatically achieved, air stopping treatment is not needed, cleaning is convenient and fast, and the use effect is good.

This invention discloses an integrated twisted decorative wall structure with seaweed-like surface decoration and its construction method. The decorative section of the GRG board surface layer is composed of stacked C-shaped cantilever panels. The seaweed-like cantilever decorative panels are integrally formed with the cantilever panels, and their cantilever length and span gradually change from bottom to top, forming a dynamic three-dimensional decorative surface. During construction, a parametric digital model is first established to drive the design, and the surface layer is divided into prefabricated GRG unit blocks for factory production. T-shaped connectors are pre-embedded on the back of the unit blocks. On-site, the unit blocks are installed on the reinforced decorative keel using adjustable cantilever connecting beams, and the precise positioning is achieved using a total station with the tip of the cantilever decorative panel as a reference to ensure accurate shaping. This invention solves the strength problem of large cantilever GRG materials through a stepped, stacked, reinforced structure, and achieves a safe, precise, and efficient presentation of complex and dynamic shapes through digital design and prefabricated assembly construction.

The invention belongs to the technical field of sea grass culture, and particularly relates to an eelgrass seed after-ripening method. The invention provides an eelgrass seed after-ripening method which comprises the following steps: collecting eelgrass reproductive branches, and removing main branches of the eelgrass reproductive branches to obtain eelgrass reproductive branch branches with Buddhist bracts; hanging the eelgrass reproduction branch branches in seawater for after-ripening to obtain eelgrass seeds. According to the method, the main branches of the eelgrass reproduction branches are removed, nutrient resource consumption of redundant tissues to the branches is reduced, more favorable conditions are created for development of the Buddha bracts and the seeds, the perfectness ratio and the seed maturity of the Buddha bracts in the after-ripening period are increased by 30% or above, the seed recovery rate is increased to 90% or above, the seed activity reaches 100%, the cost is reduced by 30% compared with that of a conventional method, and the method is suitable for large-scale popularization and application. After sowing, the seedling establishment rate exceeds 50%, the overall effect far exceeds that of a conventional collection and after-ripening mode, and the method is easy to operate, low in cost and more suitable for large-scale repair and reconstruction of the seaweed bed.

This invention discloses an intelligent seaweed planting machine, comprising a frame on which are mounted a rope feeding mechanism, a rotating rope opening mechanism, a rope pressing mechanism, a rotating material pushing mechanism, an upper and lower clamping feeding mechanism, and an electrical control system. The rope feeding mechanism is used to position, straighten, and tension the rope; the rotating rope opening mechanism is used to partially open and close the rope to provide an opening for seaweed to be pushed in; the rope pressing mechanism is used to help fix the rope to prevent it from slipping off; and the upper and lower clamping feeding mechanism is used to organize the fluffy seaweed and transport it to the rope opening. The beneficial effects of this invention are: it can change the traditional purely manual planting mode, effectively reduce the labor intensity of operators, avoid operators working in harsh environments for long periods, and significantly improve seaweed planting efficiency. The daily planting capacity of a single machine is far higher than that of manual planting, which can meet the needs of large-scale seaweed bed restoration.

The present application relates to sewage purification technical field, specifically, it relates to high-efficiency flocculation and precipitation equipment for seaweed bed sewage purification, including silt hopper, connecting cylinder and precipitation device, the bottom of silt hopper is fixedly connected with discharge valve, the outside of silt hopper is fixedly connected with multiple support rods, the precipitation device is arranged at the top of silt hopper, the precipitation device includes multiple sleeves that are coaxially stacked and fixedly connected along the vertical direction, the top of silt hopper is fixedly connected with the bottom of the sleeve close to it, the connecting cylinder is located directly above the sleeve, the bottom of connecting cylinder is fixedly connected with the top of the sleeve close to it, the inside of multiple sleeves is rotatably connected with baffles, the outer wall of baffle is fixedly connected with two rotating columns, multiple-stage baffling and precipitation channels are formed by multiple-stage sleeves that are coaxially stacked and rotatable baffles, effectively prolonging the flow path and sedimentation time of sewage, improving the sedimentation and separation efficiency of silt and flocculation suspended matter.

The invention discloses an underwater positioning, docking and recycling device for an AUV (Autonomous Underwater Vehicle), and belongs to the technical field of ocean engineering equipment. Comprising an auxiliary bearing piece and a transverse butt joint unit, an anti-skid pad provides instantaneous static friction, sensor salient points are elastically embedded with broken stones / sea grass and sense contact pressure in real time, so that the fitting degree of a mounting box and the seabed is larger than or equal to 98%, the point contact inclination error is thoroughly eliminated, and a submillimeter-level reference plane is provided for AUV butt joint; the incident flow area is divided into three micro-vortex generators by a sheet section formed by the inclined supporting pipes, the transverse supporting pipes and the inclined plane ribs of the triangular frame, the differential pressure resistance is reduced, the rated tension of a winch of a mother ship is reduced to 6.5 t from 8 t, the cable diameter is reduced to 24 mm from 28 mm, and the purchase price of the whole mooring system is reduced by 20%; after the flexible expansion supporting sleeve is expanded after being filled with water, a damping ring is formed, the transverse error tolerance is expanded to + / -120mm from + / -50mm, the vortex-induced lateral force is reduced by 35%, the probability of collision deflection of the AUV is greatly reduced, and the actual measurement sea test capture success rate is increased.

The invention relates to the technical field of environmental engineering, in particular to an ecological bank protection material and a manufacturing method thereof. The ecological bank protection material is prepared from the following substances in parts by mass: 35 to 50 parts of geopolymer gel material, 5 to 15 parts of charcoal functional filler, 3 to 8 parts of microbial curing agent, 1 to 3 parts of plant fiber, 30 to 45 parts of multi-graded aggregate, 2 to 3 parts of binder, 1 to 2 parts of urea and 0 to 8 parts of sea-grass-imitating flexible fiber bundle. Meanwhile, the invention further provides a method for preparing the ecological bank protection material, and the prepared ecological bank protection material is high in compressive strength, low in shrinkage rate, good in permeability coefficient and excellent in performance and has very good application value.

The utility model discloses degradable multilayer seagrass bed sediment carbon sequestration enhancement device: including self -sinking formula composite structure main part, the composite structure main part has the scouring surface layer, slow -release nutrient module layer, microbial carrier layer and bottom quality anchoring layer from top to bottom in proper order, the scouring surface layer adopts three -dimensional weaving degradable fiber material to make, and the surface is distributed with water -permeable hole, three -dimensional weaving fiber structure of scouring surface layer mixes and spins basalt fiber reinforced filament and top hemispherical convex, can reduce 30% 40% water flow velocity, reduces sediment resuspension to reach 60% or above, effectively restrains the degradation of seagrass bed due to the water flow erosion. The hierarchical filtration design of water -permeable hole diameter 1 2 millimeter can not only keep 0.5 millimeter below fine particle sediment beneficial to seagrass seedling bed, but also can block coarse sand and block the lower structure, forms " anti -erosion - bottom quality " double protective layer.

The utility model discloses a seaweed bed vegetation sampling device, which belongs to the field of seaweed bed vegetation sampling and comprises a sampling position adjusting component. A mounting seat is assembled on the sampling position adjusting assembly; a driving assembly is assembled on the side surface of the mounting seat, and a vegetation sampling assembly is mounted on the driving assembly. According to the seaweed bed vegetation sampling device disclosed by the utility model, when the sampling position adjusting assembly drives the vegetation sampling assembly to move into a seaweed bed vegetation area, the seaweed bed vegetation can be grabbed through the arranged vegetation sampling assembly, so that the seaweed bed sampling is realized; compared with large-range sampling in a citation file, the sampling device can realize fine telescopic adjustment of the vegetation sampling assembly, so that the sampling device is matched with the moving carrier to realize positioning grabbing of a single seaweed plant, surrounding non-target plants or redundant substrate samples are prevented from being grabbed by mistake, entrained bottom mud and non-target objects can be reduced through accurate grabbing, and the sampling efficiency is improved. And physical damage to the seabed is reduced.

The invention provides a comprehensive device for collecting, transporting and transplanting sea grass in batches and a using method. The comprehensive device comprises a cylindrical handle, a check valve, a check valve with an air nozzle cover, a cylindrical supporting column, a sea grass collecting column and an edging structure. The cylindrical handle is vertically connected with the cylindrical supporting column and internally communicated with the cylindrical supporting column, a check valve is arranged at the connecting position, a check valve with an air nozzle cover is arranged on the cylindrical supporting column, the cylindrical handle and other areas of the cylindrical supporting column are closed, and a sea grass collecting column is arranged on the lower portion of the cylindrical supporting column. The top of the sea grass collecting column is connected with the connecting position of the supporting column through the structure, the sea grass collecting column is provided with a middle containing space, and an edging structure is arranged at the lower end of the sea grass collecting column. According to the comprehensive device, efficient collection, safe transportation and rapid transplantation of the sea grass can be achieved, a beneficial tool is provided for recovery and protection of a sea grass ecological system, implementation of a large-scale sea grass recovery project is facilitated, and restoration of the damaged sea ecological system is promoted.

The present application relates to the technical field of marine ecological restoration evaluation, and specifically discloses a method for evaluating the ecological effect of island carbon sequestration, comprising: collecting sediment and biological time series data in the target island carbon sequestration area, applying wavelet transform and random forest fusion to multi-scale decomposition of the sediment organic carbon time series signal, identifying hydrodynamic noise and biological carbon sequestration characteristic spectrum, screening disturbance-resistant carbon components and constructing a carbon stability index; based on the carbon stability index, combining partial least squares path modeling and XGBoost, constructing a biological-sediment causal chain, analyzing the differential regulation path of seagrass roots and seaweed attachment devices on benthic biodiversity and sulfide dynamics, and outputting the biological path coefficient; the present application effectively distinguishes hydrodynamic noise and biological carbon sequestration characteristic spectrum by wavelet transform and random forest fusion for multi-scale decomposition of the sediment organic carbon time series signal, screens disturbance-resistant carbon components and constructs a carbon stability index, and realizes quantitative separation of physical disturbance and biological carbon sequestration contribution.

A method of synthesizing carbon quantum dots (CQDs) includes using a dried ground Halodule uninervis seagrass to form a suspension in water, followed by centrifuging and filtering through a filter membrane and a dialysis membrane to form a CQDs solution. The CQDs have a Stokes shift of less than 83.0 nm at an excitation wavelength of 380 to 430 nm.

The utility model discloses a special protection device for submarine pipeline laying, which comprises a protection block, the lower surface of the protection block is provided with a trapezoidal groove, the lower surface of the protection block is symmetrically provided with fixing plates, and the upper surfaces of the fixing plates are fixedly connected with a fixing block. According to the special protection device for laying the submarine pipeline, through the arrangement of the protection blocks, the planting grooves and the seaweed seed bags, the trapezoidal grooves can protect the submarine pipeline, the protection blocks achieve the supporting and protecting purposes, falling objects are prevented from impacting and damaging the submarine pipeline, and the throwing device lifts the protection blocks through hanging rings connected with the fixing blocks on the fixing plates to sink into the seabed; in the process, the resistance of seawater to the protection blocks and the trapezoidal grooves can be reduced through gaps, the submarine pipeline can be hidden after the sea grass seed bags in the planting grooves grow into sea grass, meanwhile, the growing sea grass can reduce the ocean current speed to help sediment deposition, and the device can utilize the porous net plate to kill water flow and dissipate water flow energy; the method has a good protection effect and is eco-friendly.