612 results about "Chain reaction" patented technology

The invention relates to a grid steel structure node failure diffusion prediction method, which comprises the following steps of: forming a failure inducement and evolution path model according to a connection form of a bolt-sphere node and a welding node, a stress transfer path, node local yield and fatigue accumulation factors; a diffusion logic of node failure-force flow redistribution-adjacent node stress concentration-chain reaction is constructed; nodes are regarded as middle points of the graph, rod pieces are regarded as edges, and propagation weights between the nodes are defined; the weight parameters are dynamically assigned based on material attributes, node connection types, spatial geometric positions and historical stress states; multi-source monitoring sensors including strain gauges, displacement meters, thermometers and accelerometers are arranged at key nodes of the grid structure, so that node states are sensed; in combination with real-time monitoring data, extracting strain rate change, vibration characteristics, frequency drift and residual deformation key characteristics of each node; a node health state feature vector set is constructed by using time sequence analysis, and the gradual degradation trend of nodes is reflected.

The invention belongs to the technical field of wafer processing, and discloses a multi-section high-flatness wafer cutting method which comprises the following steps: S1, wafer pretreatment and stress buffer layer preparation; s2, performing layered rough cutting by using a diamond blade; s3, plasma fine cutting and interface repairing; s4, performing multi-layer cooling and surface polishing; and S5, surface quality closed-loop detection is carried out. According to the method, copper layer residues and resin carbonization defects are synchronously eliminated. Cryogenic treatment induces lattice reconstruction through ultrafast phase change and blocks a chain reaction of dislocation defects, so that the intrinsic mechanical strength of the material is recovered, and a chemical mechanical polishing system activates the self-repairing characteristic of the material while removing a sub-surface damaged layer through the synergistic effect of abrasive chemical activity and mechanical shearing force, so that an atomic-scale smooth interface is formed, and the self-repairing performance of the material is improved. A closed-loop detection system depends on multi-dimensional data fusion and ion beam fixed-point repair, accurate positioning and performance recovery of cross-scale defects are achieved, and the electrical integrity of a chip functional area is ensured.

The invention discloses a safety risk management and control system for a chemical industry park, particularly relates to the technical field of risk diffusion prediction, and is used for solving the problem that in the prior art, an emergency instruction and a risk propagation path are dynamically mismatched, and cross-regional chain reaction cannot be cooperatively blocked. Environmental parameters and equipment state data are obtained through a data acquisition module, and a fluid correction module extracts a continuous coherent bar code of turbulent vortex to generate a path correction coefficient; the coupling modeling module is combined with a multi-physics field coupling equation to generate dynamic space-time propagation parameters, and the path prediction module predicts a diffusion direction and an influence area according to vector superposition of the parameters and a three-dimensional topological map; the instruction optimization module adjusts the priority and the trigger range of a control instruction, and the execution control module organizes emergency equipment to block a diffusion path according to a preset logic; through dynamic modeling and path matching optimization, time-space cooperation of emergency response and control execution is realized, and the accident diffusion risk of the chemical industry park is significantly reduced.

The invention discloses application of iron ruthenium nano-enzyme in preparation of nucleic acid detection products, and belongs to the technical field of biological detection and nano-materials. The RIN has stable peroxidase-like (POD) activity, and can catalyze a chromogenic reaction between 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) and hydrogen peroxide (H2O2). The catalytic activity of the nano-enzyme can be selectively inhibited by pyrophosphate (PPi) generated in a nucleic acid amplification reaction, so that visual colorimetric analysis on whether target nucleic acid exists or not is realized. In combination with a polymerase chain reaction (PCR) system, the invention constructs a new nucleic acid detection strategy which does not need fluorescence labeling, is simple and convenient to operate and has high sensitivity. Through verification, the system can be widely applied to rapid on-site screening and visual interpretation of related nucleic acid of drug-resistant pathogens (such as ESKAPE flora) and the like, and has a good application prospect.

The invention discloses a coal oxidation dynamic evolution multi-parameter real-time monitoring device under ultraviolet radiation, the device comprises a monitoring unit and a reaction unit, the monitoring unit comprises an ultraviolet radiation module, a gas monitoring module, a heat monitoring module, an active group monitoring module, a free radical monitoring module and a control unit, the reaction unit comprises a multi-channel in-situ reaction module and a coal sample reaction cavity, and a monitored coal sample is arranged in the coal sample reaction cavity; the ultraviolet radiation module is used for generating a controllable ultraviolet radiation field on the surface of the coal sample; the gas monitoring module is used for monitoring gas components released in the coal oxidation process in real time; the heat monitoring module is used for monitoring temperature distribution inside and on the surface of the coal sample; the active group monitoring module is used for tracking dynamic evolution of functional groups on the surface of the coal sample. Accurate and high-timeliness coal sample dynamic evolution monitoring is realized, and key data support is provided for revealing a coal oxidation chain reaction mechanism and a spontaneous combustion process.

The invention discloses an industrial equipment linkage control system based on dynamic time sequence reconstruction, relates to the technical field of kiln linkage control, solves the technical problems that a multi-system collaborative dynamic time sequence reconstruction capability is lacked and chain reaction caused by disturbance coupling is difficult to solve, and provides an industrial equipment linkage control system based on dynamic time sequence reconstruction by distinguishing humidity abnormal levels and customizing a heating strategy. The method ensures that heat release is completely matched with a wet material transmission rhythm, improves product drying uniformity, accurately calculates retention time and rotation speed according to a kiln type, realizes a'moisture evaporation demand-rotation speed-retention time 'closed loop, reduces energy consumption, integrates real-time material parameters, waste heat recovery and environment heat dissipation, accurately calculates a heat gap, and performs graded response, so that the energy consumption is reduced, and the energy consumption is reduced. And finally, a cooling air volume-pressure correlation model and an induced draft fan compensation-pressure repair model are established, accurate pressure compensation during cooling strengthening is achieved, and the stability of the microenvironment in the kiln is improved.

The invention discloses a marine ranch breeding equipment reliability evaluation method and system based on a large model, and the method comprises the steps: obtaining the operation parameters of all breeding equipment in a marine ranch, and obtaining an interaction data set between the equipment; constructing a dependency graph model by taking the breeding equipment as nodes; injecting a simulation fault signal into at least one breeding device, and deducing a fault propagation probability by adopting a Bayesian network to obtain a chain reaction path; when the activation value of the node in the chain reaction path exceeds a preset activation threshold value, calculating the overall reliability level according to the path length and the influence weight of the path on the dependency graph model; comparing and analyzing the reliability level with reliability data of each fault record sample in the historical operation log data; when the similar fault scene is matched, it is determined that the overall operation state is abnormal, and meanwhile the corresponding breeding equipment is abnormal, and the hysteresis quality of breeding equipment reliability evaluation in the prior art can be effectively reduced.

The invention provides a lubricating oil production multi-source data fusion analysis method which comprises the following steps: acquiring a stirrer rotating speed signal, acquiring pressure distribution data of a corresponding pipeline, and if the stirrer rotating speed fluctuation range exceeds a preset threshold range, marking that the stirring rotating speed is abnormal; analyzing the pressure distribution change of the pipeline when the stirring rotating speed is abnormal, combining the monitored viscosity change of the oil fluid and the difference of the oil circulating flow speed, and performing fusion calculation to obtain a shear stress distribution index in the pipeline; if the shear stress distribution index is abnormal, the suspension state of oil particles and the deposition rate of pollution particles are detected, and if the suspension state and the deposition rate exceed corresponding preset threshold values, the oil pollution diffusion degree is determined through the suspension state and the deposition rate; and identifying abnormal equipment according to the abnormal signal time sequence correlation, acquiring operation parameters of the abnormal equipment, synchronously analyzing to obtain equipment operation state coupling, analyzing equipment fault chain reaction characteristics, and generating an equipment chain abnormality distribution diagram according to the chain reaction characteristics.

The invention discloses a new energy battery topological insulator fire extinguishing system and a chain reaction suppression method, and the fire extinguishing system comprises a detection module arranged in a battery module; the composite tank is internally provided with a topological insulator composite material, and the topological insulator composite material is a Bi2Te3-coated PFPE compound; and the high-pressure directional release device is connected with the composite tank. According to the invention, the Bi2Te3-coated PFPE compound is injected into the battery module through the high-pressure directional release device, so that a thermal runaway chain reaction can be effectively blocked, secondary reburning is avoided, and the use safety of a new energy battery is greatly improved.

The utility model provides a compressed air foam fire extinguishing device. The compressed air foam fire extinguishing device comprises a pressure container, a compressed air foam generating part, a driving unit and a foam release spray pipe assembly, wherein foam premixed liquid is preloaded in the pressure container; the compressed air foam generating part adopts a shunt damping principle; compressed air foam with a certain foaming multiple is formed in compressed air foam liquid released by the compressed air foam generating part based on the flow division damping principle, the particle size of water can be refined, the coverage area of the water can be increased, more heat can be absorbed, comburent can be efficiently cooled, the penetrating force is improved through the compressed air foam, and the heat efficiency is improved. And the flame retardant can rapidly permeate into comburent to prevent rapid chemical chain reaction in the combustion process.

The invention relates to the technical field of aluminum oxide production, and provides an evaporation station intelligent optimization system based on multivariable coupling regulation, which comprises a DCS (Distributed Control System) lifting module used for optimizing a control strategy and hardware support; the intelligent optimization control module is used for realizing multivariable coupling regulation and control; the data storage and analysis module is used for historical data recording and process analysis; the execution module is used for receiving the control instruction and driving field equipment; the DCS control system lifting module, the intelligent optimization control module and the data storage and analysis module are in bidirectional communication connection in sequence, and the intelligent optimization control module is in unidirectional communication connection with the execution module. Through multivariable coupling regulation and an intelligent algorithm, mother liquor discharging index fluctuation is stabilized, and the operation qualification rate and the alkali circulation efficiency are improved; steam consumption matching is optimized, and energy conservation and consumption reduction are achieved; variable fluctuation chain reaction is reduced, and abnormal response time is shortened; automation of key procedures is promoted, and manual errors are reduced.

The invention discloses a risk assessment method and system for chemical leakage, and relates to the technical field of risk assessment. A risk assessment system for chemical leakage comprises a chemical three-dimensional construction module, a chemical leakage simulation module and a chemical leakage assessment module. According to the method, the chemical three-dimensional distribution model is constructed, so that the types, reserves and space structures of the chemicals in the region are comprehensively perceived, and the authenticity and space accuracy of leakage simulation are enhanced; a chemical compatibility matrix and a logic adjacency chain diagram are introduced, so that a potential chain reaction path is effectively identified, and the pre-judgment capability of a complex accident coupling risk is improved; a leakage space prototype is set based on a leakage point, and a surrounding building model is constructed, so that risk assessment has structured and local response capabilities, and the comprehensive influence of building purposes, function sensitivity and exposure conditions can be reflected.

The invention provides a method for synchronously inverting unsaturated soil solute reaction parameters, and belongs to the technical field of software development. The method comprises the following steps: establishing an initial model for simulating chain reaction migration of solutes in unsaturated soil based on HYDRUS-1D software, and generating a corresponding input file; based on observation data of the one-dimensional vertical infiltration test, determining a plurality of solute reaction parameters to be synchronously inverted and an initial value range thereof; adopting a genetic algorithm to randomly generate an initial population containing multiple groups of parameter combinations in the initial value range; performing solute transport simulation on each group of parameter combination in the population, and automatically extracting a simulation result; calculating a fitness value corresponding to each parameter combination based on the observation data and the simulation result obtained in the step S4; and iteratively optimizing, and judging whether a termination condition of the genetic algorithm is met or not. By optimizing a software running program and adjusting automatic extraction and processing of calculation parameters, efficient and continuous soil solute transport analysis is realized.

The present document describes methods and systems for amplifying and quantifying amplification of a nucleic acid molecule, with a polymerase chain reaction (PCR) or a loop-mediated isothermal amplification (LAMP), by irradiating, with a heating activation light beam from a continuous wave laser a biological enzymatic reaction mixture in solution comprising a nucleic acid template, a polymerase enzyme, and chemically modified nanoparticles. Quantification of the amplification is achieved by irradiating the biological enzymatic reaction mixture during an annealing and / or elongation steps with an ultraviolet (UV) light source and measuring with a photodetector a transmission change in UV light transmission.

The invention discloses a preparation method of reactive antioxidant grafted modified nylon 6 and a film thereof, and belongs to the technical field of nylon modification. A reactive antioxidant containing a hindered phenol structure and nylon 6 are subjected to melt chemical grafting to form a covalent bond combined nylon 6-antioxidant system, and hindered phenol provides hydrogen atoms and can be combined with free radicals generated in the aging process, so that the chain reaction of the hindered phenol is terminated, and phenoxy free radicals with low activity are formed by the hindered phenol. According to the invention, the reactive antioxidant grafted modified nylon 6 is further processed into a film product, and the nylon 6 film product prepared by the method has the advantages of less antioxidant migration, aging resistance, high mechanical property retention rate and the like.

The invention relates to an organic combined polluted underground water in-situ remediation method based on a micro-nano iron-based material. The method comprises the following steps: acquiring underground water pollution information; establishing a composite reaction zone at a preset position, and constructing a reduction-oxidation chain reaction system; and operating the composite reaction zone, collecting monitoring data, and optimizing the composite reaction zone until the composite pollution is degraded and removed to a preset value. Through series reaction of powerful reduction of the micro-nano iron-based material and advanced oxidation of the iron-based activated persulfate, the performance of the micro-nano iron-based material serving as a strong reduction material and an active agent is fully played, pollutants such as halogenated hydrocarbon in underground water are sequentially subjected to reduction degradation, pollutants such as benzene series and volatile phenol are sequentially subjected to oxidative degradation, and the pollution to the underground water is reduced. Effective management and control of underground water combined pollution of medical and chemical parks and enterprises are realized; a monitoring well is configured based on a composite reaction zone, and remediation materials are discontinuously added in combination with management and control conditions, or other management and control materials are flexibly selected, so that long-term management and control of groundwater pollution risks are realized.

The invention provides a cooperative control method for a power grid and associated power plants and related equipment, and in the method, a real-time power grid load and a grid-connected point voltage between each power plant and the power grid need to be acquired firstly, so that power grid operation monitoring is carried out according to the real-time power grid load and the grid-connected point voltage of each power plant. When at least one of the real-time power grid load and the voltage of each grid-connected point triggers a preset abnormity judgment rule, abnormal fluctuation data are determined, and at least one of active power and reactive power of at least one power plant is adjusted according to the abnormal fluctuation data, inverter power characteristics of each power plant and system inertia data of the power grid, so that the power grid load is determined; and the connection between the power grid and the load end and each power plant is maintained. Therefore, the active and reactive conversion relation in each power plant can be fully considered, chain reaction caused by adjustment lag of single equipment is avoided, and the operation stability of a power grid is ensured.

In traditional plant breeding approaches, chemical mutagenesis may be utilized to introduce nucleotide substitutions at random in the genome of a plant, i.e. without possibilities to control the sites of nucleotide changes. Because of genome complexities, the statistical probability is extremely little when it comes to finding a predetermined nucleotide substitution. The present invention, however, demonstrates how a novel, alternative use of digital polymerase chain reaction (dPCR), preferably droplet dPCR (ddPCR), is developed to exploit finding of specific nucleotide substitutions in mutated genes. The entire platform comprises a screening method with a library of mutagenized organisms, digital PCR-based systems and a set-up to propagate and analyze identified, mutated organisms.

The invention discloses a foaming sealing strip material and a preparation method thereof, and relates to the technical field of high-molecular compound compositions. The foaming sealing strip material is prepared from the following components in parts by mass: 80-110 parts of ethylene propylene diene monomer, 5-15 parts of a foaming agent, 3-8 parts of an activating agent, 2-6 parts of a cross-linking agent, 30-60 parts of a filling agent, 20-40 parts of a softening agent, 1-3 parts of a foaming aid and 1-4 parts of an anti-aging agent. The anti-aging agent adopted by the invention can effectively capture free radicals generated in a rubber oxidation process, terminate a chain reaction and prevent a rubber main chain from being broken; ultraviolet light energy can be absorbed and converted into heat energy, and light degradation of a rubber molecular chain is reduced, so that the aging resistance of the sealing strip is remarkably enhanced.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

A fully automatic digital polymerase chain reaction (dPCR) system is provided. The target system includes: a sample preparation unit configured to receive a biological sample and extract nucleic acid therefrom; an analysis container; a separator configured to generate a plurality of sample partitions including the extracted nucleic acids and to distribute the generated sample partitions into the analysis container; a thermal cycler configured to adjust a temperature in the generated sample partition so as to amplify a target nucleic acid in the generated sample partition; and a sample reader configured to detect whether an amplified nucleic acid is present in each generated sample partition within the analysis container. The subject system also includes an anti-adhesion coating configured to at least reduce binding of the extracted nucleic acid to the dPCR system. Methods and kits for implementing the invention are also provided.

The utility model discloses a chemical looping reaction system for co-processing sintering flue gas and coal gas, which comprises a sintering flue gas reactor, the upper part of the sintering flue gas reactor is connected with a first gas-solid separator, the lower part of the first gas-solid separator is connected with a first material return valve, the first material return valve is connected with a coal gas reactor, and the middle lower part of the coal gas reactor is provided with an overflow port; the overflow port is connected with the sintering flue gas reactor through an overflow pipe, and the sintering flue gas reactor and the coal gas reactor are filled with oxygen carriers. The device has the beneficial effects that the sintering flue gas and various coal gases of the steel mill can be cooperatively treated; heat and oxygen of the sintering flue gas are recycled; pollutants such as NOx, SO2, CO and dioxin in the sintering flue gas are treated; high-quality steam is produced for heat supply or power generation; and CO2 generated by coal gas combustion is enriched.

The invention discloses ultrasensitive detection of vibrio parahaemolyticus by a CRISPR (clustered regularly interspaced short palindromic repeats) electrochemical biosensor based on PCR (polymerase chain reaction) and a hairpin DNA (deoxyribonucleic acid) probe, which comprises the following steps: preparing a gold nanoelectrode, modifying the gold nanoelectrode by using the hairpin DNA probe, performing polymerase chain reaction amplification to obtain a PCR amplification product, adding the PCR amplification product into a CRISPR system, uniformly oscillating, and detecting the vibrio parahaemolyticus by using the CRISPR electrochemical biosensor. Placing in a 37 DEG C constant-temperature metal bath for pre-reaction for 10 minutes, and dropwise adding the obtained reaction system to the surface of the hairpin DNA probe modified gold nanoelectrode. The method disclosed by the invention is high in overall repeatability and stability, the modification density of the surface of the electrode can be reduced, the steric hindrance effect is further reduced, the trans-cutting efficiency is improved, and in actual detection, the method shows remarkable sensitivity, is high in specificity, short in time consumption, low in cost and simple and convenient to operate, and can be applied to field detection.

Nucleic acid error suppression is provided. In various embodiments, DNA is extracted from a collection of plasma samples. A sequence library with duplex adapters is prepared by ligating a duplex adapter having a Unique Molecule Identifier (UMI) to an end of each of a plurality of strands of the extracted DNA and amplifying the extracted DNA with a first polymerase chain reaction (PCR). A subset of the whole genome library is selected and amplified with a second PCR to increase an amount of PCR duplicates. A plurality of duplex reads is sequenced from the amplified subset aligned to a host genome and denoised based on said alignment. A variant presence is detected in at least one of the plurality of duplex reads. A signature of the variant is determined, which is compared to a collection of disease-specific variant signatures. A disease type is determined based on the comparison.

The invention discloses a method for wrapping stem cells by adopting programmable DNA (deoxyribonucleic acid) hydrogel and application of the method, under isothermal physiological conditions, three-dimensional DNA hydrogel is formed through a hybridization chain reaction of an initiation chain (I) and hairpin structure DNA to realize reversible wrapping and release of the stem cells. The hairpin structure DNA is formed by denaturation-renaturation treatment of at least two DNA monomer building blocks, and the mechanical rigidity of the hydrogel is realized by regulating and controlling the molar ratio of the initiation chain (I) to the total amount of the DNA monomer building blocks; the DNA hydrogel can reversibly wrap and release stem cells, and the wrapped stem cells can maintain activity and dryness and recover normal multiplication capacity after being released. According to the method disclosed by the invention, the activity and dryness of the stem cells are remarkably maintained, obvious immune activation is avoided, and the method provides a brand new tool for in-vitro culture and engineering application of the stem cells and has a wide application prospect.

The invention relates to an automatic pre-warning system after equipment failure for a smart power plant. The automatic pre-warning system comprises a data acquisition unit, a fault point judgment unit, a fault propagation relationship network establishment unit, a shutdown risk assessment unit and a pre-warning unit. The method has the beneficial effects that through cooperative work of data acquisition, fault point judgment, fault propagation relationship network modeling, shutdown risk assessment and an early warning unit, fault propagation chain reaction is dynamically quantified, and the shutdown risk probability of the whole plant is generated, so that the defects of incomplete path analysis and lagging risk calculation in a multi-equipment fault scene in a traditional method are overcome; the accuracy of fault early warning is improved, so that an effective emergency response basis is provided for operation and maintenance personnel of an intelligent power plant; the propagation probability matrix generation module corrects the final propagation probability according to the actual fault propagation mark value, and the final propagation probability is corrected in each fault propagation event, so that prediction becomes more and more accurate along with system operation.

The invention discloses a flame-retardant PA66 material and a preparation method thereof.The flame-retardant PA66 material is prepared from, by weight, 80-100 parts of a modified PA66 material, 3-5 parts of modified graphene, 15-30 parts of a flame-retardant additive and 0.1-0.5 part of tetraphenylphosphorus bromide, a molecular chain of the flame-retardant additive contains an organic silicon chain segment and an organic phosphorus structure and is doped with nitrogen and boron elements, and when the material is burnt, the flame-retardant PA66 material has a flame-retardant effect, and the flame-retardant PA66 material has a flame-retardant effect. The organic phosphorus can be dehydrated to form a phosphoric acid carbon layer, the nitrogen element can release inert gas, dilute combustible gas and generate an expansive phosphorus-nitrogen carbon layer with the organic phosphorus, the boron element can improve the compactness and high-temperature stability of the carbon layer, and the organic silicon can form a cross-linked network shape, so that the continuity of the carbon layer is improved; a fluorine-containing polysiloxane chain segment of a side chain of the flame-retardant additive is embedded among molecules of the modified PA66 material, and is decomposed to generate fluorine free radicals during combustion, and active free radicals in a combustion chain reaction are quenched, so that a rapid flame-retardant effect is achieved.

The invention relates to the technical field of chip interconnection, in particular to a virtual fault domain isolation and recovery method suitable for a Lingqu interconnection system, which comprises the following steps: when a fault event occurs, a state machine is switched to a QUIESCE mode, and a transaction shadow table is maintained; carrying out classification processing on the uncompleted transactions in the transaction shadow table, and monitoring the state of the access object; and after reconnection, task replay is carried out according to the transaction shadow table, and the state machine is switched back to the ACTIVE state. In order to solve the problem that in the prior art, a third-party node with a fault in a Lingqu interconnection system is prone to causing chain reaction, an isolation mechanism is added to an IO interconnection chip used for being connected to a third-party chip, a state machine of a fault domain is switched to a QUIESCE mode, a transaction shadow table of an uncompleted transaction is established, and the transaction shadow table of the uncompleted transaction is obtained. According to the method and the system, the IO interconnection chip performs proxy processing on part of transactions after the access object is recovered, so that faults of other equipment in the interconnection system are prevented from being caused in a fault reconnection stage, and replaying is performed after the access object is recovered, thereby realizing risk isolation and recovery processes.

The invention provides a reverse osmosis reducing agent and a preparation method and application thereof, and belongs to the technical field of reverse osmosis water treatment.The reverse osmosis reducing agent comprises a first reducing agent, a second reducing agent and a solvent; the first reducing agent is thiosulfate, and the second reducing agent is sulfite and / or bisulfite; the mass ratio of the first reducing agent to the second reducing agent is (1: 18)-(10: 1). The reverse osmosis reducing agent can be applied to reverse osmosis water treatment, the reverse osmosis reducing agent is added into reverse osmosis inlet water to be treated, and the reverse osmosis inlet water subjected to reduction treatment can be obtained after full reaction. The first reducing agent and the second reducing agent are compounded according to the specific mass ratio, so that the compounded reverse osmosis reducing agent can effectively inhibit the occurrence of advanced oxidation chain reaction while keeping high reducibility, and effective reduction of reverse osmosis inlet water can be realized by using a small amount of the reverse osmosis reducing agent.

The invention relates to the technical field of refrigeration air conditioners, in particular to an efficient environment-friendly low-GWP air conditioner refrigerant formula and a preparation method thereof. The technical problem that an existing low-GWP refrigerant is high in flammability is solved. According to the refrigerant formula prepared by the invention, a high-energy-efficiency natural working medium and an ultralow-GWP fourth-generation refrigerant are taken as main components, a small amount of phosphorus-nitrogen hybrid compound is added as a flame-retardant additive, and the main components are mixed under the conditions of low temperature and high pressure. The flame-retardant additive adopted by the invention has excellent flame retardance, and can capture free radicals and release inert gas to inhibit combustion chain reaction during combustion. Nanoscale dispersion of the additive is realized through a low-temperature ultrasonic-assisted microjet homogenization technology, and the stability of the components is ensured by utilizing online monitoring. According to the refrigerant prepared by the invention, the combustibility is greatly reduced while the refrigeration performance is ensured, and both low GWP and low combustibility are realized.