228 results about "Sea urchin" patented technology

The invention relates to a seawater multi-nutrient mixed culture device for shrimps, shells and gallbladders and a using method thereof, the mixed culture device comprises a culture box and net cages, floating plates are fixedly connected to the net cages, and symmetrically arranged adsorption plates are slidably connected to the interior of the culture box. Sea urchins are cultured in the net cage of the mixed culture device, and prawns and mussels are cultured in the culture box. By adopting the mixed culture device for mixed culture of shrimps, shells and gallbladders, on one hand, deep cleaning of the inner wall of the culture box is facilitated, the time consumed for cleaning the inner wall of the culture box can be shortened, and the convenience of cleaning the culture box is improved; on the other hand, the total survival rate of species bred in a mixed mode is 100%, the total net yield value of unit water is larger than or equal to 6.4 g / L, the yield of unit area is increased, and the environmental risk possibly caused by single breeding is reduced.

The invention belongs to the field of preparation of nano materials, and discloses a CoP / Co (OH) 2 sea urchin-shaped heterojunction catalyst growing on foamed nickel and a preparation method and application of the CoP / Co (OH) 2 sea urchin-shaped heterojunction catalyst. Alkali cobalt carbonate (CoCH) is used as a precursor, a crystalline phase CoP substrate is generated through a low-temperature phosphating method, then the surface of the crystalline phase CoP substrate is uniformly coated with an amorphous Co (OH) 2 layer through an electro-deposition process, and the self-supporting phosphating / hydroxyl heterogeneous structure catalyst (CoP / Co (OH) 2) is successfully constructed. The obtained CoP / Co (OH) 2 shows excellent complete water splitting performance, and is benefited from the high-activity specific surface area (Cdl = 44.66 mF cm <-2 >) and the interface rapid electron conduction characteristic (Rct = 0.43 omega) of a heterogeneous structure; when two electrodes are assembled to fully decompose water, the cell voltage is only 1.780 V when the current density is 250 mA cm <-2 >, and after continuous operation is carried out for 24 hours, the performance is basically kept unchanged, and the voltage fluctuation ratio is lower than 0.5%. CoP / Co (OH) 2 is prepared into a 2 * 2cm < 2 > self-supporting electrode to construct AEMWE, only 2.08 V cell voltage is needed under the ultrahigh current density of 1A cm <-2 >, the AEMWE can stably run for 250 hours, the attenuation rate is 80 mu V h <-1 >, meanwhile, the hydrogen production efficiency is calculated to reach 96.2% through gas metering and Faraday law, and the engineering potential of the AEMWE in large-scale hydrogen production application is verified.

The invention belongs to the field of mariculture, and particularly relates to an oyster-sea urchin-undaria pinnatifida three-dimensional ecological breeding method suitable for a silt seabed. The method comprises the following steps: (1) construction of an oyster reef: hanging oysters in a silt sea area, and putting the cultured oysters to the seabed to form the oyster reef; (2) culturing undaria pinnatifida: culturing undaria pinnatifida above the oyster reef by adopting a buoyant raft; (3) putting sea urchin seedlings: putting the sea urchin seedlings by using the natural pore structure of the oyster reef as a sea urchin inhabiting place; (4) settlement feeding management: the cultured undaria pinnatifida is dropped to a sea urchin inhabiting area on the sea bottom to serve as sea urchin bait. Compared with a traditional single culture mode, the utilization rate of the culture space is increased by 3.2 times, the bait cost is reduced by 65%, the nitrogen and phosphorus load of a water body is reduced by 40%, meanwhile, the purposes that the growth speed of sea urchins is high, the survival rate is increased, the content of organic matter in sediments in an oyster area is reduced, and fresh undaria pinnatifida is efficiently utilized are achieved, and remarkable economic benefits and ecological benefits are achieved.

The invention provides a sea urchin-shaped FeP-coated NC composite material and a preparation method and application thereof, the composite material is formed by wrapping internal FeP nanoparticles with an external nitrogen-doped carbon layer, and presents a unique sea urchin-shaped structure; the preparation method comprises the following steps: preparing a FeOOH precursor by a hydrothermal method, adding the FeOOH precursor into a Tris buffer solution for ultrasonic dispersion, adding dopamine into the solution, stirring for a long time at normal temperature, separating, washing, and drying to obtain FeOOH (at) PDA; carrying out phosphating treatment on FeOOH-coated PDA and sodium hypophosphite at two ends of a porcelain boat according to a certain mass ratio in an atmosphere full of Ar to obtain a FeP-coated NC composite material; as a sodium ion battery negative electrode material, the composite material shows excellent electrochemical performance, and the specific capacity of 174.5 mAh g <-1 > can still be kept after 200 times of circulation under the current density of 2A g <-1 >, so that the material has the electrochemical performance with higher application potential.

The invention relates to the technical field of aquatic animal living body transportation, and discloses a sea urchin long-distance transportation synergistic method based on dry transportation and anhydrous volatile anesthesia, which comprises the following steps: placing sea urchin in a closed container, using a natural volatile substance as an anesthetic, loading and volatilizing through an adsorption material, and performing anhydrous anesthesia on the sea urchin; the anesthetized sea urchin is inversely placed on a fixing support with a mesh structure in a transportation container in the posture that the mouth face faces upwards and the thorns face downwards, and the sea urchin is prevented from rolling over in the transportation process through the self-locking effect of the thorns and meshes; a functional interlayer is arranged in the fixing support, and a temperature control material and a moisturizing material are placed in the functional interlayer at the same time to maintain the temperature and humidity of the transportation environment; after transportation, the sea urchins are placed in seawater containing the cactus extract for initial recovery and then transferred to flowing natural seawater to complete unified recovery, a whole-process collaborative protection chain of anhydrous anesthesia loss prevention, dry transportation steady state maintenance and rapid water phase restoration can be constructed, and the dry transportation survival rate and quality are remarkably improved.

The invention discloses a method for detecting a tumor marker PD-L1 by using a composite structure optical fiber sensor based on gold nano sea urchin, which comprises the following steps: preparing a pSC4 solution, and soaking NS-LSPR-FOS in the pSC4 solution for 12 hours; washing to remove uncombined pSC4 molecules; immersing the end face of the sensor in a PBS solution containing 20 [mu] g / mL of PD-L1 antibody for 1 h to form a specific recognition layer; soaking the end face of the sensor in a BSA solution for 20 minutes; the end faces of the sensors are sequentially immersed into PD-L1 antigen solutions with different concentrations, each group is immersed for 45 minutes, and the concentrations are from small to large; and recording a reflection spectrum once every 15 seconds through a spectrograph, tracking resonance valley wavelength movement, and detecting the concentration of PD-L1. Compared with liquid biopsy methods such as ELISA, IFA and a micro-fluidic chip, the liquid biopsy method has the advantages of small size, no mark, real-time detection, in-vivo detection and the like, is expected to overcome two challenges of low concentration and spatial-temporal heterogeneity characterization of tumor marker PD-L1 detection, and plays an important role in cancer research and immunotherapy.

The invention discloses a preparation method of a double-response self-repairing super-hydrophobic coating on the surface of an aluminum alloy. The preparation method is specifically implemented according to the following steps: step 1, preparing sea urchin-shaped photo-thermal particles Fe3O4-at-TiO2; step 2, preparing self-repairing porous boron nitride; 3, preparing thermal response particles by an emulsion method; step 4, carrying out photocuring and dynamic disulfide bond crosslinking modification; and 5, preparing the double-response self-repairing super-hydrophobic coating. The invention also discloses the coating prepared by the method, the light absorption area is increased by preparing the sea urchin-shaped Fe3O4-coated TiO2, and after the two materials form a heterojunction, absorption spectrums complement each other, so that the energy of sunlight can be more efficiently utilized, and the photothermal conversion efficiency is improved. Porous boron nitride (PBN) increases the specific surface area, loads more perfluoropolyether and forms a continuous heat conduction channel through a porous framework to improve the heat conductivity, it is guaranteed that heat can be transmitted to the thermal response shell to the maximum extent, and the thermal response efficiency is improved.

The invention discloses a dot matrix structure of a bionic sea urchin mouthpart, namely an Arimastodes lantern, and a design method and application of the dot matrix structure. The bionic lattice structure has good designability and manufacturability, starting from the bionic concept, the structural and morphological characteristics of the sea urchin mouthpart serve as design elements, the design elements are matched, and regulation and control of local characteristics such as the bionic unit beam diameter, the panel (curved surface) thickness, the unit size and the porosity serve as a design scheme. The stress state and fracture failure characteristics of the lattice structure are effectively improved, and the mechanical properties and functional characteristics such as compressive strength, energy absorption performance, deformation resistance, service life and deformation recovery capacity of the lattice structure are optimized. The bionic lattice structure is prepared by adopting an additive manufacturing technology. The invention is expected to play a huge role in the fields of light-weight energy-absorbing structural members, orthopedic implants, dot matrix radiators and the like.

The invention discloses a strongylocentrotus intermedius and stichopus japonicus ecological breeding device which comprises a breeding pond, an upper-layer breeding assembly and a lower-layer breeding assembly, sleeves are arranged at the four corners of the inner wall of the breeding pond respectively, and the upper-layer breeding assembly is erected at the tops of the sleeves and used for breeding strongylocentrotus intermedius; the lower-layer breeding assembly is located below the upper-layer breeding assembly and receives food residues and seaweed mud leaked from the upper-layer breeding assembly for breeding stichopus japonicas. Through arrangement of the sleeves, the upper-layer breeding assembly is convenient to mount and dismount, then the lower-layer breeding basket is convenient to maintain, and the stichopus japonicas in the breeding basket are convenient to catch; the net cage is supported through the cross beams, the net cage is kept stable in the culture pond, food residues fall into the culture baskets from the meshes, the food residues are consumed through stichopus japonicus culture, the culture water quality can be improved, ecological culture with the food mutual benefit relation is achieved, the culture volume is fully utilized, and the culture yield and economic benefits are improved.

The application discloses a sea urchin-shaped antibacterial piezoelectric copper-zinc oxide and a preparation method and application thereof, and belongs to the field of biological medical materials. The preparation of the copper-zinc oxide comprises the following steps: (1) weighing Cu 2+ and Zn 2+ containing compound raw materials, dissolving the raw materials in deionized water, and preparing a mixed solution after dispersion; (2) adding the mixed solution obtained in the step (1) into deionized water containing DMSO, stirring and uniformly mixing, and preparing a solution containing Cu 2+ and Zn 2+ ; (3) adding an alkali source into the solution obtained in the step (2), heating and reacting, centrifugally collecting a precipitate, and obtaining the copper-zinc oxide after washing. The copper-zinc particles are subjected to thermal hydrolysis under the action of the organic solvent DMSO under an alkaline condition, and the copper-zinc oxide with a sea urchin-shaped structure is generated; and the oxide exhibits excellent piezoelectric antibacterial performance under stirring at room temperature.

The invention provides a symbiotic culture net cage for mixed culture of sea urchins and sea cucumbers, and relates to the field of culture net cages. The central position is rotationally connected with a first rotating shaft and is provided with an upper cross rod and a lower cross rod; the second net wall is connected between the two rods, the edge is attached to the inner side of the first net wall, and the net cage can be movably separated; the net frame is mounted on the rotating shaft, is provided with a third net wall, is provided with an opening in the top and is specially designed for sea urchin culture, and the sea urchin culture device further comprises a bottom dirt cleaning assembly for cleaning the frame assembly and a dirt discharging assembly for discharging dirt cleaned by the dirt cleaning assembly. The vertical second net wall is arranged in the first net wall, the whole net cage is divided into two areas, the third net wall capable of containing sea urchins is installed in one of the areas, position exchange and joint culture of sea cucumbers and sea urchins can be achieved, and therefore partition culture of sea urchins and sea cucumbers is achieved; direct contact and mutual interference of the sea urchin and the sea cucumber are avoided, and respective growth is facilitated.

The invention discloses a functional gel feed for purple sea urchins and a preparation method of the functional gel feed. Wherein the mass fraction of the 5-HT in the functional gel feed is 0.05%-0.05%, and the energy of the functional gel feed is 1800-2000 kcal / kg; after the functional gel feed is used for feeding the purple sea urchins for 20-40 days, the egg yolk protein content of the purple sea urchins is 400-497 mg / g; and the gonad index is 9-13%. On one hand, the functional gel feed disclosed by the invention is balanced in nutrition, rich in various nutrient substances required by the growth of the purple sea urchins, capable of meeting the growth and development requirements of the purple sea urchins, high in feed digestibility and capable of reducing excrement discharge and reducing pollution of breeding to the environment; and on the other hand, the feed is gel-shaped, is good in palatability and is easy to eat by the purple sea urchins. In addition, the functional gel feed is good in stability in water and not prone to loss, and the utilization rate of the feed can be increased.

The invention belongs to the technical field of sea urchin treatment, and discloses an automatic sea urchin shell opening device which comprises a shell opening mechanism, a clamping mechanism, a synchronous centering mechanism, a placing platform, a [-shaped connecting piece, a side plate and a cross beam. The claw opening device provided by the invention is of a clip-like structure with a conical head, the opening claw is driven by the air cylinder to perform downward pricking and opening, the shell opening efficiency is high, the downward pricking of the claw opening device is limited by a stroke, and the damage to sea urchin meat is small; meanwhile, an elastic clamping block in the clamping mechanism can be automatically adjusted to clamp the sea urchins of different sizes, the sea urchins of different sizes can be located in the same spatial position by matching with an arc-shaped side baffle and an upper stop block in the mechanism, the sea urchins cannot be taken up by an opening claw after being subjected to shell opening, and the shell opening stability is improved; the synchronous centering mechanism is a rack synchronous transmission mechanism, transmission efficiency is high, work is stable, and rapid clamping of sea urchins is facilitated.

The application discloses a biomimetic urchin-shaped asymmetric structure composite phase change chitosan aerogel loaded with TiO2 / rGO heterojunction and a preparation method and application thereof, adopts argon plasma etching GO, step-by-step dropwise adding tetrabutyl titanate to prepare TiO2 / rGO heterojunction; prepares a multi-level structure phase change microcapsule by an interfacial polymerization method; mixes the heterojunction with a chitosan solution, and prepares a biomimetic urchin-shaped asymmetric chitosan aerogel framework through a customized asymmetric mold and a unidirectional freezing process; fixes the phase change microcapsule by a vacuum-assisted impregnation method, and then performs in-situ coating through polydopamine to obtain the biomimetic urchin-shaped asymmetric structure composite phase change chitosan aerogel loaded with TiO2 / rGO heterojunction, the removal rate of VOCs of the biomimetic urchin-shaped asymmetric structure composite phase change chitosan aerogel loaded with TiO2 / rGO heterojunction is greater than or equal to 80% at low temperature, the phase change microcapsule dispersion rate is less than or equal to 3% after 100 cycles, the structural stability and the cycle durability are excellent, and the biomimetic urchin-shaped asymmetric structure composite phase change chitosan aerogel loaded with TiO2 / rGO heterojunction is suitable for efficient purification of VOCs in low-temperature closed scenes such as cold chain workshops and indoor environments in winter.

The present invention provides a seaweed fertilizer material that allows for easy and inexpensive fertilization and supplemental fertilization of seaweed, as well as enabling the strengthening and reuse of cultivation ropes, a seaweed cultivation facility equipped with this material, a method for manufacturing the seaweed fertilizer material, and a method for cultivating seaweed. [Solution] The seaweed fertilizer material 1 according to the present invention is a seaweed fertilizer material 1 for fertilizing seaweed, and contains raw rubber and shell powder obtained by grinding the shells of marine organisms into powder, and is formed in the form of a sheet or string. The shell powder may be powder from sea urchin shells, and may further contain iron fulvic acid.

Embodiments of the present disclosure relate to a system for attracting and monitoring marine life by capturing images on and around the seafloor surrounding a device of the system. The system can quantitatively measure the effectiveness of attracting and culling marine life such as but not limited to sea urchins. The attracting and the culling features can be used independently.

The invention relates to the technical field of hydrogen production through methane cracking, in particular to a sea urchin-shaped composite catalyst, a preparation method thereof and application of the sea urchin-shaped composite catalyst in hydrogen production through methane cracking. The obtained sea-urchin-shaped composite catalyst has a sea-urchin-shaped appearance, can efficiently catalyze methane cracking to produce hydrogen, simultaneously captures CO2 produced by vapour gasification carbon deposition in a catalyst regeneration process to generate CaCO3, promotes the gasification hydrogen production of the carbon deposition and strengthens the removal effect of the carbon deposition, and the generated CaCO3 can also be converted into CO in situ, so that the catalyst has a good application prospect. The obtained catalyst has good anti-sintering performance and excellent recycling performance.

The invention relates to an intelligent fishing robot and a fishing method for benthic organisms cultured in an ocean cofferdam, and solves the technical problem of how to improve the automatic fishing efficiency for sea cucumber cultured in the ocean cofferdam. The device comprises a catamaran, a left side mechanical arm support, a right side mechanical arm support, a conveying belt support, a conveying belt device, a collecting basket, a plurality of left side mechanical arms and a plurality of right side mechanical arms, the conveying belt device is located between the left side mechanical arms and the right side mechanical arms, and the collecting basket is located below the rear end of the conveying belt device. The method is suitable for benthic organisms such as sea cucumbers, abalones, scallops, mussels and sea urchins which are cultured in an ocean cofferdam mode.

The invention relates to the technical field of nanofiber materials, in particular to a PI / W18O49 / g-C3N4 bifunctional nanofiber material as well as a preparation method and application thereof. The material comprises a PI nanofiber sheet, w18O49 nanometer sea urchin and a g-C3N4 nanometer sheet are loaded on the surface of the PI nanometer fiber sheet through in-situ growth, and the W18O49 nanometer sea urchin and the g-C3N4 nanometer sheet form a heterojunction. The preparation method of the material comprises the following steps: step 1, preparing a PI nanofiber sheet; step 2, preparing the W18O49 nanometer sea urchin; (3) preparing a g-C3N4 nanosheet; and step 4, preparation of the PI / W18O49 / g-C3N4 nano fiber sheet. The problems that in an existing photocatalyst, the recombination probability of photo-induced electron-hole pairs is high, precious metal needs to be introduced into an existing SERS substrate, and the recycling difficulty of the photo-induced electron-hole pairs and the existing SERS substrate is large after the photo-induced electron-hole pairs and the existing SERS substrate are used are effectively solved, and the method is suitable for photocatalytic degradation and SERS detection of tetracycline.

The invention provides a preparation method and application of a phenylboronic acid functionalized sea urchin-shaped COFs material, the COFs material is of a sea urchin-shaped structure, a covalent organic framework serves as a substrate, the substrate is modified through phenylboronic acid groups, the surface morphology of the COFs material is controlled by regulating and controlling the concentration of acetic acid, and functional sea urchin-shaped COFs materials with different morphologies are synthesized. The phenylboronic acid modified sea urchin COFs material not only has remarkable bactericidal performance, but also can specifically adsorb pollutants with vicinal diol structures in various water bodies, and shows remarkable application value in the field of water pollution control.

This invention provides an iron-carbon based catalyst, its preparation method, and its application, relating to the field of wastewater treatment technology. The preparation method includes: S1, adding bamboo powder and humic acid to an alkaline solution and stirring to obtain a carbon precursor; S2, adding the carbon precursor to a glucose solution and carrying out a hydrothermal reaction to obtain a carbon complex; S3, adding an active iron source and an auxiliary agent to a humic acid solution to obtain a complex solution; S4, adding the carbon complex to the complex solution and performing gradient calcination under an inert atmosphere to obtain the iron-carbon based catalyst. The entire preparation process of this invention requires no external binder or pore-forming agent, reduces sintering temperature, and has low cost. The prepared sea urchin-type iron-carbon based catalyst exhibits extremely strong iron-carbon bonding, is not easily detached, and has high stability. Its structure provides a large number of active sites, and the radial nanospikes maximize the specific surface area, greatly promoting Fe... 3+ / Fe 2+ It can recycle and increase the yield of •OH, has strong catalytic activity, and can efficiently degrade recalcitrant organic pollutants.

The invention discloses a rapid fattening bait for sea urchins and a preparation method thereof, and belongs to the technical field of aquaculture feeds. The bait is prepared from the following raw materials in parts by weight: 10-25 parts of kelp powder, 10-25 parts of undaria pinnatifida powder, 5-15 parts of ulva pertusa powder, 5-15 parts of mussel powder, 8-20 parts of corn flour, 1.5-4.5 parts of gelatin powder and 30-50 parts of purified water. The sea urchin fattening feed has the beneficial effects that the formula is scientific, the nutrition is comprehensive and balanced, and the sea urchin fattening feed specially aims at the sea urchin fattening nutritional requirements and can remarkably promote rapid development of sea urchin gonads; after the bait enters water, the structure can be kept complete for a long time, the bait is almost free of dissolution loss, the utilization rate of the bait is greatly improved, and water pollution is fundamentally avoided; the bait is soft in texture and easy to gnaw by sea urchins, and the surface of the bait can slowly release food calling substances to attract the sea urchins to gather and eat; in the preparation process, low-temperature mixing and gel shaping are adopted, so that nutrient substances such as heat-sensitive vitamins and unsaturated fatty acids are effectively protected.

The invention discloses an application of a sea urchin-shaped spinel electrode material in a solid oxide fuel cell (SOFC), and the SOFC oxygen electrode material is sea urchin-shaped NiCo2O4 spinel and is prepared by a hydrothermal method. The sea-urchin-shaped spinel is self-assembled to the surface of the YSZ electrolyte through a current polarization induction method, the sea-urchin-shaped spinel electrode can maintain a good nano structure and a high specific surface area without a high-temperature sintering process, an SOFC based on the sea-urchin-shaped spinel oxygen electrode obtains excellent electrochemical performance, and at the working temperature of 700 DEG C, the electrochemical performance of the SOFC is greatly improved. The maximum output power can reach 2.06 W / cm < 2 >, the ohmic impedance is 0.053 ohm cm < 2 >, the polarization impedance is 0.077 ohm cm < 2 >, and excellent long-term stability is shown.

The invention provides a modular aquatic higher plant ecological treatment method and system for sea urchin / sea cucumber culture tail water, and belongs to the technical field of culture tail water treatment. The gradient process of tail water introduction, first-stage rough filtration, second-stage ecological purification and third-stage deep purification is adopted, and the treated tail water is shunted and reused in a culture pond or discharged after reaching the standard. No chemical agent is added, residue bait recycling and tail water circulation are achieved, purification is stable and efficient, cost is reduced, operation and maintenance are easy, the method is suitable for large-scale aquaculture, treated tail water can be directly recycled after being disinfected, seawater resources are greatly saved, a complete aquaculture water circulation closed loop is formed, the ecological property, practicability and economical efficiency are achieved, and the method is suitable for large-scale aquaculture. The method is suitable for tail water treatment and resource utilization of various sea urchin / sea cucumber culture modes.

This invention discloses an antibacterial hydrogel with photothermal-triggered drug release properties, its preparation method, and its applications. The antibacterial hydrogel comprises a hydrogel matrix material, mesoporous polydopamine-encapsulated sea urchin gold nanoparticles loaded onto the matrix material, and a carried antibacterial drug. The hydrogel is polymerized from aldehyde-modified hyaluronic acid and carboxymethyl chitosan, whose Schiff base bonds endow the hydrogel with excellent self-healing properties and stable mechanical properties. The loaded mesoporous polydopamine-encapsulated sea urchin gold nanoparticles can effectively carry the antibacterial drug and simultaneously possess a photothermal heating effect, endowing the hydrogel with excellent antibacterial properties. Controllable drug release can be achieved under near-infrared light irradiation, realizing the synergistic antibacterial effect of photothermal-drug interaction, effectively killing periodontal pathogens, inhibiting periodontal tissue loss, and improving periodontitis.

An aquaculture device designed to hold and secure marine species such as scallops, urchins, or oysters in an underwater environment while they grow, the device configured to be deployed and retrieved in a manner similar to conventional commercial fishing gear.

The invention belongs to the technical field of marine biomechanical measurement, and particularly discloses a sea urchin adsorption force accurate measurement device and method, the device comprises a workbench and a first base, a second base and a third base on the workbench, and each base is provided with a power system, an S-shaped external test head and a fixed pulley; the S-shaped external testing head is connected with the digital display pull and push dynamometer and the computer, one end of the S-shaped external testing head is connected with the power system, and the other end is connected with the sea urchin adsorption system through the fixed pulley; the sea urchin adsorption system comprises a high-transmittance glass jar filled with seawater, an L-shaped transparent acrylic plate fixed on the inner wall of the jar and a nylon net bag used for containing sea urchin, and an image collector is arranged at the bottom of the high-transmittance glass jar. The power system is used for providing constant tension, and the sea urchin adsorption system and the data processing system are combined, so that the accurate quantitative measurement of the sea urchin adsorption force is realized. The device adopts a standardized test environment and automatic data acquisition, reduces man-made interference, and reduces mechanical damage to sea urchins.

The present application relates to a kind of three-dimensional sea urchin-like Bi2S3 / Bi2O2S or ZnO / Bi2O2S heterojunction and its preparation method and application in photoelectric detector, the Bi2S3 / Bi2O2S heterojunction is made of Bi2S3 Nanorod and Bi2O2S nanoflower, the ZnO / Bi2O2S heterojunction is made of ZnO Nanorod and Bi2O2S nanoflower;The Bi2O2S nanoflower is made of ultrathin Bi2O2S nanosheet, Bi2O2S nanoflower is uniformly grown on substrate;Bi2S3 Nanorod is grown on the surface of ultrathin Bi2O2S nanosheet constituting Bi2O2S nanoflower;ZnO Nanorod is grown on the surface of ultrathin Bi2O2S nanosheet constituting Bi2O2S nanoflower;The Bi2S3 / Bi2O2S heterojunction or ZnO / Bi2O2S heterojunction as a whole presents three-dimensional sea urchin-like structure.The method of the present application can effectively promote the carrier separation of Bi2O2S, improve the sensitivity, responsivity of photoelectric detector.Simultaneously, one-dimensional Bi2S3 Nanorod or ZnO Nanorod is grown on the surface of Bi2O2S, forms three-dimensional sea urchin-like Bi2S3 / Bi2O2S heterojunction, or ZnO / Bi2O2S heterojunction, light is reflected and absorbed on the surface of material multiple times, improves the light absorption utilization rate, further improves the detection performance of photoelectric detector.

This invention relates to the field of sea urchin aquaculture technology, and provides a method and system for sea urchin instance segmentation and high-throughput measurement of growth traits. The method includes: acquiring calibrated images containing sea urchins; extracting sea urchin pixel boundaries using a pre-trained SUYOLO-seg model; calculating the sea urchin pixel area using a polygon area formula, and calculating the true physical area of ​​the sea urchin based on the pre-calibrated true physical area of ​​each unit pixel; and estimating the true weight of the sea urchin using a sea urchin weight trait prediction model based on the mapping relationship between sea urchin area and weight. This achieves completely non-contact measurement of growth traits, avoiding the strong stress response caused by removal from water, ensuring normal growth and development, and completely solving the weighing error problem caused by water retention on the sea urchin surface and between its spines.

The invention belongs to the technical field of battery materials, and provides a sea urchin-shaped Mn2O3 positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing manganese acetate, polyvinylpyrrolidone and ethanol to obtain a mixed solution; mixing trimesic acid and ethanol to obtain a trimesic acid solution; mixing the mixed solution and a trimesic acid solution, heating and stirring to obtain a precursor; and calcining the precursor. The Mn2O3 positive electrode material provided by the invention has a sea urchin-shaped morphology, provides more reaction active sites, has a relatively high specific surface area, increases the contact area with an electrolyte, accelerates electrochemical reaction, and improves the electrochemical activity and structural stability of an aqueous battery; the sea urchin-shaped morphology is beneficial to relieving volume expansion caused by the positive electrode material in the charging and discharging process, and the cycling stability is improved; the preparation method is simple, raw materials are easy to obtain and low in cost, the method is simple, and the prepared sea urchin-shaped Mn2O3 positive electrode material is good in controllability and suitable for large-scale production.