249results about How to "Suppress generation" patented technology

The invention discloses a sludge low-temperature oxidation treatment system and method. The system comprises a pretreatment unit, a feed lifting mechanism, a low-temperature oxidation furnace, a flue gas purification unit and an automatic control unit. The low-temperature oxidation furnace is divided into a feeding area, a low-temperature oxidation area and an air distribution and slag discharge area from top to bottom, an air distribution plate is provided with air outlets which are uniformly arrayed, the temperature of the low-temperature oxidation area is controlled to be 420-480 DEG C, and generation of dioxin is inhibited from the source. The pretreatment unit is used for mixing sludge, biomass and quartz sand to form a loose breathable material to prevent the sludge from hardening; the method comprises the steps of material mixing, continuous feeding oxidation, temperature closed-loop regulation and control, flue gas purification and ash treatment, high-water-content municipal sludge can be stably treated, the energy consumption is low, the dioxin generation amount is low, flue gas emission reaches the standard, ash can be recycled, and the method is suitable for large-scale municipal sludge harmless treatment.

A molded solder is obtained by press-molding a mixture of plural types of metal powders, in which at least one type of metal powder of the plural types of metal powders is made of an alloy comprising a plurality of metal elements, and a melting temperature change is generated by heating the molded solder at a temperature equal to or higher than the lowest liquidus temperature of liquidus temperatures of the plural types of metal powders.

This invention provides an electrolyte, a battery, a battery pack, and an electrical device. The electrolyte includes additives, including fluorocarbonate, unsaturated carbonate, a first sulfide additive, a second sulfide additive, and an anhydride additive. The first sulfide additive includes sulfonate compounds; the second sulfide additive includes sulfite compounds and / or sulfate compounds. Based on the mass of the electrolyte, the mass percentage of each component is as follows: fluorocarbonate m1%, 1.5≤m1≤5; unsaturated carbonate m2%, 1.5≤m2≤3; first sulfide additive m3%, 0.5≤m3≤2; second sulfide additive m4%, 0.5≤m4≤2; anhydride additive m5%, 0.3≤m5≤0.8; and satisfies 1≤(m1+m2) / (m3+m4+m5)≤3. This invention can effectively suppress gas generation at high temperatures in the battery and improve the cycle performance and storage performance of the battery under high-temperature conditions.

The application relates to the field of adsorbents, and discloses a LiLSX molecular sieve adsorbent and a preparation method thereof. The method comprises the following steps: 1) sequentially performing molding treatment, first drying and first calcination on a mixture of kaolin and NaLSX molecular sieve powder to obtain a first calcination product; 2) performing pre-wetting treatment on the first calcination product to obtain a pre-wetting product; 3) contacting the pre-wetting product with alkali and a silicon source or contacting the pre-wetting product with alkali and an aluminum source in the presence of water to obtain a contact product; 4) performing second drying and second calcination on the contact product to obtain a second calcination product; and 5) performing lithium ion exchange on the second calcination product by using an exchange solution containing lithium ions, and the amount of the NaLSX molecular sieve powder is 85% or more in weight based on the total weight of the mixture. The method can make the prepared LiLSX molecular sieve adsorbent have excellent adsorption performance and mechanical strength.

This invention relates to the field of fine chemical technology, specifically disclosing a production process for electronic-grade diethyl carbonate. The method includes the following steps: ethylene carbonate and anhydrous ethanol undergo a transesterification reaction in a microwave reactor catalyzed by a composite catalyst; the reaction solution is then subjected to phase separation treatment, followed by a continuous separation process coupling atmospheric and vacuum distillation to obtain an intermediate; further purification is achieved by molecular sieve adsorption to remove metal impurities and moisture, combined with precision filtration using a polytetrafluoroethylene membrane. The composite catalyst significantly improves the transesterification reaction efficiency and product selectivity. This process, through the synergistic effect of reaction process enhancement and multi-stage purification technology, achieves highly efficient removal of moisture, metal impurities, and nanoscale particles from the reaction system. The resulting electronic-grade diethyl carbonate meets the stringent requirements of high-end electronic chemicals such as lithium battery electrolytes, and possesses technical advantages such as short reaction cycle, thorough impurity removal, and high product purity.

This invention discloses a method for preparing and applying a current collector for a negative electrode-free sodium metal battery modified with monodisperse metal sites. The current collector substrate is placed in the reaction chamber of an atomic layer deposition (ALD) apparatus. A metal source and co-reactants are introduced through alternating feeding to generate monodisperse metal atoms, ultimately producing a negative electrode-free sodium metal current collector. By constructing uniform, high-density monodisperse metal atoms on the surface of the current collector substrate, the active sites of the metal atoms are densely and uniformly distributed. This guides sodium metal to deposit and peel off in a dense, flat layered morphology, effectively suppressing sodium dendrite formation and reducing the generation of dead sodium during cycling. This significantly improves the coulombic efficiency of the negative electrode-free sodium metal battery. When applied to a negative electrode-free sodium metal battery, the battery can achieve stable long-cycle operation in the initial state of a completely sodium-free negative electrode, effectively improving battery cycle stability and coulombic efficiency, and significantly extending battery life.

The application belongs to the technical field of lithium batteries, and discloses a gel electrolyte taking a functionalized two-dimensional MXene material as a dispersant as well as a preparation method and application of the gel electrolyte. The gel electrolyte comprises a functionalized MXene material and a basic electrolyte; the functionalized MXene material is obtained by the following method: 1) treating a MAX phase material with a solution containing HCl and LiF, intercalating, peeling off, and then reacting with a diazonium salt solution to obtain a sulfonic acid functionalized MXene material. The application further discloses a preparation method of the gel electrolyte. The application reconstructs a lithium ion solvation structure, reduces a desolvation energy barrier, homogenizes a bulk phase electric field and ion flow, cooperatively induces formation of a stable SEI interface rich in inorganic species, significantly inhibits lithium dendrite growth, and improves interface kinetic stability. The method is simple and low in cost. The electrolyte is used in a lithium metal battery and exhibits excellent cycle performance.

The application relates to a composite type corrosion and scale inhibition water treatment agent, which is obtained by in-situ copolymerization of phosphono carboxylic acid copolymer after modification of nitrogen-doped carbon quantum dots on the surface of attapulgite as a carrier. The application has the beneficial effects that: the attapulgite is used as the carrier, can be used as a grafting bridge to load the carbon quantum dots on the surface and in-situ generate the phosphono carboxylic acid copolymer, and has a synergistic effect; the nitrogen-doped carbon quantum dots have rich amino, carboxyl and hydroxyl functional groups on the surface, make it difficult for calcium carbonate microcrystals to gather or interfere with the normal growth of the crystals to inhibit scale crystal generation, have high stability, are coated with zinc ions, improve the antibacterial property of the material, are modified on the surface of the attapulgite, have excellent adsorption performance, and can effectively remove organic matters, heavy metals and the like in water; the phosphono carboxylic acid copolymer is in-situ generated on the surface of the attapulgite, has a good compounding effect, has a good effect on corrosion inhibition, and has good corrosion inhibition performance.

The invention relates to the technical field of boiler combustion control, in particular to a boiler intelligent combustion precise air distribution online monitoring system which comprises a combustion state sensing module, a combustion state sensing module, an execution adjusting module, an online monitoring feedback module and a data storage and visualization module. According to the boiler intelligent combustion precise air distribution online monitoring system, through fusion of multi-dimensional combustion state perception and a deep learning algorithm, intelligent self-adaptive optimization of an air distribution scheme is achieved, a traditional manual experience adjustment and single parameter control mode is abandoned, and the intelligent combustion precise air distribution online monitoring system is high in practicability. Key information in the combustion process is comprehensively captured by multiple types of sensors such as infrared thermal imaging and flue gas analysis, air volume, air speed and air temperature adjusting instructions of primary air, secondary air and tertiary air are accurately output through data preprocessing and fusion model operation, and complex working conditions such as fuel type change and load fluctuation can be dynamically adapted; real-time decision making and regulation can be completed without manual intervention, and the intelligent level of boiler combustion control is improved.

The invention discloses a low-smoke halogen-free flame-retardant cable for a charging pile, and belongs to the technical field of cables. The cable sequentially comprises a conductor, an insulating layer and an outer sheath layer from inside to outside, the conductor is formed by mutually twisting copper-tin alloy wires; the insulating layer is made of butadiene styrene rubber; the outer sheath layer is prepared from the following components in parts by weight: 40 to 60 parts of high-density polyethylene, 15 to 20 parts of acrylate rubber, 10 to 15 parts of ethylene-vinyl acetate copolymer, 8 to 10 parts of modified silicon dioxide, 3 to 8 parts of compatilizer, 1 to 2 parts of antioxidant and 1 to 2 parts of lubricant. The prepared modified silicon dioxide is used as a flame-retardant reinforcing component in the outer sheath layer, and the comprehensive performance of the low-smoke halogen-free flame-retardant cable for the charging pile can be remarkably improved.

The invention discloses an efficient hydrogen purification device suitable for an ultra-high-temperature working condition. The efficient hydrogen purification device comprises a pressure-bearing shell; the Getter material bed layer is arranged in the pressure bearing shell; the heating system is used for heating the Getter material bed layer, and the heating system is configured to maintain the operation temperature of the Getter material bed layer at 600 DEG C + / -10 DEG C; the invention further discloses an efficient hydrogen purification method suitable for the ultrahigh-temperature working condition. According to the invention, high-efficiency purification of hydrogen under high-temperature and high-pressure conditions is realized, the impurity content is obviously reduced, the service life of the device is prolonged, and reliable technical support is provided for industrial hydrogen purification.

This invention relates to the field of skincare technology, disclosing a composition containing acetylated curcumin, its preparation method, and its application. The composition comprises 0.01-0.50 wt% acetylated curcumin, 0.10-0.5 wt% ferulic acid, 0.05-0.40 wt% citric acid compounds, and 5.00-20.00 wt% polyol. Ferulic acid quenches reactive oxygen species and improves the stability of acetylated curcumin; citric acid compounds stabilize the pH of the system, chelate metal ions, block the Fenton reaction, and inhibit the generation of •OH free radicals; the polyol enhances the water solubility of acetylated curcumin and improves the stability of ferulic acid. This invention, through the compounding of ferulic acid, citric acid compounds, and polyol, significantly reduces the problems of discoloration, off-flavor, and pH decrease caused by the decomposition of acetylated curcumin aqueous solutions under high temperature or light conditions. Furthermore, the preparation process is simple, easy to operate, and highly adaptable to various processes.

The invention discloses a preparation method of aromatic diether dianhydride, which comprises the following steps: S1, feeding: adding a dihydroxyl monomer, an alkaline compound, a transition metal complex catalyst, an organic solvent and a water diversion agent into a reaction container, and continuously introducing inert gas; s2, water separation: raising the temperature to separate out water in a reaction system; s3, etherification reaction: adding a nitrophthalimide derivative, raising the temperature to carry out etherification reaction, filtering after the reaction is finished, and carrying out reduced pressure distillation on filtrate to remove the solvent, so as to obtain an etherified product; and S4, carrying out hydrolysis ring opening, acidification and dehydration ring formation on the etherification product to prepare the aromatic diether dianhydride. According to the preparation method of the aromatic diether dianhydride, the specific catalyst is introduced in the etherification reaction stage, a high-selectivity catalytic system is formed, generation of by-products can be effectively inhibited, the yield and purity of target etherified products are remarkably improved, tedious steps of etherification and purification are avoided, the total preparation process is simplified, and the preparation method is suitable for industrial production.

This invention discloses a highly selective method for preparing triethylenetetramine. The method uses 2-chloroethylamine hydrochloride and ethylenediamine as raw materials, reacting them in an aqueous solution. An aqueous solution of ethylenediamine with a concentration of 1-100 wt% is added dropwise to an aqueous solution of 2-chloroethylamine hydrochloride with a concentration of 1-100 wt%. The dropping rate of the ethylenediamine solution is 5% to 100% of its own mass per hour. The reaction temperature is 30-200 °C (oil bath temperature), and the reaction time is 2-20 hours (including the dropping time). The molar ratio of 2-chloroethylamine hydrochloride to ethylenediamine is 2:1 to 40:1. This invention is the first to propose a direct synthesis of triethylenetetramine from the bulk chemicals 2-chloroethylamine hydrochloride and ethylenediamine. Compared with the previously reported dichloroethane amination method and the nucleophilic substitution method between dichloroethane and ethylenediamine, this method offers milder reaction conditions, simpler operation, and higher selectivity, making it suitable for industrial production.

This invention relates to the field of waste salt resource utilization and industrial waste gas treatment technology, and provides a skid-mounted micro-interface enhanced dual electro-displacement device for preparing ammonium alkali from mixed salts. The invention includes a selective electrodialysis unit, a micro / nano bubble generator unit, and at least two sets of parallel multi-chamber dual electro-displacement units. The selective electrodialysis unit separates a mixed salt solution of sodium chloride and sodium sulfate into sodium chloride and sodium sulfate stock solutions. This device integrates selective electrodialysis, the micro / nano bubble generator, and the dual electro-displacement unit in a skid-mounted configuration, forming an integrated continuous flow reaction system. This device achieves efficient and synergistic resource conversion of industrial waste salt and waste gas, producing sodium carbonate and ammonium salts with high purity that meet national standards. Furthermore, the process is energy-saving, environmentally friendly, and produces no secondary pollution.

The application discloses a kind of self-adapting flameless combustion multi-pollutant collaborative control methods for electronic waste pyrometallurgical recovery two combustion chambers, it is related to the technical field of combustion control and pollutant generation in situ inhibition of electronic waste pyrometallurgical recovery.The combustible component flue gas is introduced into the front section of two combustion chambers, so that the combustible flue gas environment is formed in the front section of two combustion chambers;The auxiliary fuel is introduced into the front section of two combustion chambers in the form of axial injection, and the flameless distributed combustion main reaction zone is formed in the front section of two combustion chambers;In the rear end of two combustion chambers, the combustion-supporting medium is introduced in a staged oxygen-supplying manner, and the oxidation reaction of carbon monoxide and intermediate combustible components in the combustion products is completed through a high-temperature oxidation environment;Based on the temperature field distribution, oxygen concentration distribution and combustion incomplete component characteristic parameters in two combustion chambers, the fuel injection parameters and combustion-supporting medium staged supply parameters are adjusted, so that the overall combustion state in two combustion chambers is stably maintained in the flameless distributed combustion state.The application can improve the overall pollutant control stability and operation reliability of the system.

This invention provides a waste pyrolysis gas combustion device and its combustion method, belonging to the field of waste treatment technology. The invention includes: a shell, foam ceramic balls, a central tube, a preheater, a mixing tube, a co-firing air sleeve, and a flow-dispersing component. This invention uses foam ceramic balls as a heat storage carrier in conjunction with a preheater to achieve stable ignition of pyrolysis gas with low calorific value fluctuations, effectively adapting to the combustion requirements of waste pyrolysis gas with low calorific value and parameter fluctuations, and improving combustion stability. The flow-dispersing component in the mixing tube enhances gas-gas mixing, improving combustion efficiency and pollutant control, increasing combustion completeness, reducing pollutant generation, and optimizing combustion efficiency. The compact structure of the nested central tube and mixing tube with annular slot air intake achieves efficient space utilization and integrated application, realizing precise gas distribution and efficient mixing within a limited space. The overall layout of the device is compact and easy to integrate.

The utility model discloses a welding tooling applied to dissimilar materials relates to welding technical field, including the carrier plate for bearing copper material and aluminum material, and the carrier plate is provided with the fixture for fixing copper material and aluminum material two position, the welding tooling still includes the water tank of can accommodate carrier plate and make the cooling liquid can immerse the welding area between copper material and aluminum material, and the spray assembly of the fixed or movable mode to the welding area spray cooling liquid is selected. The utility model discloses through setting up the carrier plate of bearing copper material and aluminum material and fixed clamp, can ensure two kinds of to be welded material to keep stable relative position in the welding process, avoid because of the misplacement of welding thermal stress or mechanical disturbance, and the water tank of can accommodate carrier plate and make the cooling liquid immerse the welding area is integrated simultaneously, and the spray assembly of optional fixed or movable mode, make the tooling have the double function of whole immersion cooling and spray cooling.

The invention provides a preparation system and a preparation method of an autoblood contrast agent, and relates to the field of contrast imaging. The preparation system of the autologous blood contrast agent comprises an infusion passage, a reaction unit, an input passage, an output passage, an air supply unit and a liquid storage unit, the membrane oxygenator of the reaction unit comprises a liquid passage and a gas passage which are separated by a membrane; the input passage is located upstream of the inlet of the liquid passage of the membrane oxygenator; the output passage is positioned downstream of the outlet of the liquid passage of the membrane oxygenator; the liquid storage unit is located at the downstream of the output passage; the gas supply unit is located at the upstream of an inlet of a gas passage of the membrane oxygenator and transmits reaction gas into the gas passage, and the reaction gas at least comprises nitric oxide and oxygen. According to the preparation system of the autoblood contrast agent, the technical problems that in the prior art, a gadolinium-containing contrast agent or other metal element contrast agent is low in safety and narrow in application range are solved.

This application relates to stable pharmaceutical compositions. The present invention provides stable pharmaceutical compositions containing (+)-11-[2-[2-[(diethylamino)methyl]-1-piperidinyl]acetyl]-5,11-dihydro-6H-pyrido[2,3-b][1,4]benzodiazepine-6-one or salts thereof, and stabilization methods for (+)-11-[2-[2-[(diethylamino)methyl]-1-piperidinyl]acetyl]-5,11-dihydro-6H-pyrido[2,3-b][1,4]benzodiazepine-6-one or salts thereof.

This invention belongs to the field of motor vehicle exhaust purification technology, specifically providing a low-precious-metal three-way catalyst for purifying exhaust gases from equivalent combustion natural gas engines, its preparation method, and its application. The catalyst is divided into a front zone and a rear zone with an axial length ratio of 1:1 to 1:3 along the exhaust gas flow direction. Both zones are equipped with a carrier and a double-layer catalyst coating; the lower layer is a Pd-based mixture, and the upper layer is a Pt-Rh-based mixture. The oxygen storage composite material is a combination of rare-earth composite oxides and cerium-zirconium-aluminum composite materials. All precious metals are prepared using an organic acid competitive adsorption method. The total CeO2 content of the catalyst is 100~130 g / L. This invention can achieve CO and NO purification with a low precious metal loading of ≤0.7063 g / L. X The system effectively purifies unburned CH4, significantly reducing the generation of byproduct NH3. The generation of NH3 in both fresh and aged states is stably controlled within 10 ppm. It does not require a supporting ammonia escape catalyst, and the preparation process is fully compatible with existing industrial catalyst production lines, making it suitable for industrial mass production and applications in both light and heavy-duty natural gas vehicles.

This invention provides a stabilizer composition and its preparation method. The stabilizer composition comprises, by mass percentage: 50%–99.9% alkane oil solvent, 0.01%–40% fatty acid salt compound, and 0.01%–20% modified fumed silica; wherein the modified fumed silica is fumed silica surface-treated with organohalosilanes. The stabilizer composition of this invention exhibits high dispersibility and low impurities, and can meet the stringent requirements of metallocene catalysts.

This invention discloses an ammonia-based desulfurization system and method based on zoned control, comprising a desulfurization tower, an absorption circulation tank, an ammonia water tank, a washing tank, and a process water tank. The desulfurization tower, from top to bottom, has a flue gas outlet, a demisting section, a second-stage absorption layer, a first-stage absorption layer, and a concentration section. The absorption circulation tank is divided into an upper oxidation tank and a lower absorption circulation section by a partition. The recovered liquid from the first-stage absorption is connected to the absorption circulation section of the absorption circulation tank via a pipeline; the oxidation tank has an aeration pipe connected to the spray inlet of the second-stage absorption via a pipeline; the lower concentration section of the desulfurization tower is connected to the oxidation tank via a liquid delivery pipeline. The washing tank supplies water to the demisting section and the absorption circulation tank; the ammonia water tank replenishes ammonia water to the oxidation tank, the first-stage absorption layer, and the absorption circulation section of the absorption circulation tank. This invention eliminates coupling interference between absorption and oxidation by dividing the tank into zones within the same tank; combined with two-stage absorption and demisting recovery, it effectively controls ammonia escape while ensuring efficient sulfur dioxide removal.

The application provides a method for improving the flavor and quality of tilapia surimi products, and belongs to the technical field of aquatic product processing, and comprises the following steps: tilapia muscles are cut into small pieces, an improving agent is added, and the muscles are ground; the well-stirred surimi is made into fish cakes and shaped; the fish cakes are taken out after floating, and are placed in cold water for cooling; the shaped fish cakes are respectively fried at 150 DEG C, 180 DEG C and 210 DEG C for 4 min; the fish cakes are vacuum packaged and stored in a refrigerator after cooling; the flavor of the surimi is analyzed, the quality of the surimi is detected, and the deterioration of the surimi is determined and analyzed; threonine, creatinine and glucose are dissolved in a phosphate buffer to obtain A liquid; diethylene glycol is taken, mixed with soybean oil, and mixed with an improving agent by vortexing to obtain B liquid; the A liquid and the B liquid are fully mixed in a 48 mL sealed high-temperature pressure-resistant reaction bottle, and then are placed in an oil bath for reaction and then are placed in an ice water bath for reaction termination; the solution after reaction is removed and is reserved; the MeIQx content, precursor substances and intermediate substances of the MeIQx generation simulation system solution after reaction simulation are determined.

The application discloses a preparation method of aromatic aldehyde by oxidizing aromatic hydrocarbon, and the method comprises the following steps: contacting a solution containing aromatic hydrocarbon with a supported catalyst under an oxygen-containing atmosphere, and reacting to obtain the aromatic aldehyde; the reaction is carried out in a fixed bed photocatalytic reaction device; and the supported catalyst is a TiO2 surface supported oxide catalyst. The fixed bed reaction device can keep the activity of the target reaction and the high selectivity of the product for a long time, and effectively overcomes the problem of excessive oxidation of the product.

The application belongs to the technical field of sodium-ion battery cathode materials, and discloses a pyrophosphoric acid sodium iron phosphate composite material and a preparation method and application thereof. By regulating the microenvironment of chelation reaction, the chelation state of iron ions is optimized, iron ion precipitation is avoided, and the formation of electrochemically inert impurities is inhibited. Meanwhile, graphene oxide constructs a three-dimensional conductive network to improve the electronic transmission capacity of the material. The pyrophosphoric acid sodium iron phosphate composite material prepared by the application has small particle size, uniform dispersion, no inert impurities and is tightly coated by the conductive network. The material has a discharge specific capacity of 120.9 mAh·g ‑1 at 0.5 C, still maintains a reversible capacity of 78.1 mAh·g ‑1 at 20 C high rate, and has a capacity retention rate of 84.9% after 1000 cycles, and the full battery assembled with the hard carbon negative electrode also exhibits excellent rate and cycle performance.

The invention belongs to the technical field of solid-state batteries, and discloses an alloy ion / electron mixed conductor and application thereof. The mixed conductor is prepared by taking antimony powder, lithium powder or sodium powder and at least one metal powder of lanthanum, scandium, yttrium, aluminum, gallium and indium as raw materials through ball-milling mixing, tube sealing annealing and quenching treatment. When the mixed conductor is used as an interlayer of a lithium / sodium metal negative electrode and an electrolyte in the solid-state battery, the growth of lithium / sodium dendrites can be effectively inhibited through a specific nucleation mechanism, and the utilization rate of the metal negative electrode is improved; when the conductive additive is used as a conductive additive of a silicon, red phosphorus or graphite / hard carbon negative electrode material, by virtue of high ion / electron conductivity and good potential stability, the interface side reaction is reduced, and the rate capability and the cycling stability of the negative electrode material are remarkably improved.

This utility model discloses a scale inhibition mechanism and a water outlet device with the scale inhibition mechanism. The scale inhibition mechanism includes: a support; a slow-release cylinder for storing scale inhibitor, the slow-release cylinder having several slow-release holes, and the slow-release cylinder being connected to the support; a movable member having a cavity, one end of which is open as a first port, the slow-release cylinder extending into the cavity through the first port, the movable member being movable relative to the support between a first position and a second position; an elastic member applying an elastic force to the movable member to move it to the second position; the movable member and the support are used to control whether the slow-release cylinder releases the slow-release liquid. Since the scale inhibition mechanism only releases the scale inhibitor when the water flow in the water outlet device is still, it slows down the flow rate of water and scale inhibitor through the slow-release holes, reduces the dissolution rate of the scale inhibitor, and slows down the consumption of the scale inhibitor.

The invention discloses an engineered adoptive macrophage based on a nano battery as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The preparation method disclosed by the invention comprises the following steps: taking an immunologic adjuvant working solution as a raw material, and obtaining nanoparticles with high drug loading capacity through an assembly effect; as the main energy of ChARM comes from an immunologic adjuvant, the high-drug-loading nano-particle is also called a high-energy-density nano-battery. Diluting the obtained nano particles with a cell culture medium, and co-incubating the diluted nano particles and macrophages to obtain engineered macrophages loaded with the anti-tumor or anti-inflammatory nano battery; the assembly mode is any one of supramolecular assembly, prodrug assembly or metal coordination assembly; the high-density drug-loaded nano battery can endow engineered cells with excellent biological functions. The method solves the technical problems that the preparation of the existing CAR-M is expensive, the gene modification is complex, and the nano-drug delivery system is unstable.

This application discloses an automatic feature engineering method, device, medium, and product for predicting the remaining useful life of industrial equipment. It relates to the fields of intelligent operation and maintenance, fault prediction and health management of industrial equipment, and automatic feature engineering using machine learning. The method includes: acquiring an initial candidate feature set and labels; constructing a directed acyclic graph (DAG) for feature transformation using candidate features as nodes and recording derivation relationships; assigning nodes to multiple agents to establish a collaborative search decision-making process; encoding node states using a graph attention network and fusing parent-child relationships and context to generate action distributions; constructing prior policy guidance based on node feature types and feasible region constraints; sampling actions to update the graph structure and obtain a new candidate feature set; and using an evaluator to calculate performance increments as rewards, iteratively optimizing until the optimal feature set is output. This application can automatically construct feature combinations characterizing the degradation process of industrial equipment, significantly improving the accuracy and stability of remaining useful life prediction.