493results about How to "Avoid generating" patented technology

The invention discloses a system and a method for security enhancement of generated content information of a large model, and the method comprises the steps: firstly, carrying out the bidirectional LoRA fine tuning technology and knowledge distillation technology on the large model, and enabling the large model to adapt to a factual output task from the illusion dimension and the factual dimension; performing extraction of intermediate layer representation in a fact space on the fine-tuned large model, and obtaining different mappings from fine-grained illusion types to a fact direction through a comparative learning method; and finally, in the reasoning generation process of the large model, extracting the representation of the middle layer of the large model to judge the potential illusion type, then applying the learned mapping corresponding to different illusions to the middle representation of the reasoning process, correcting factual representation, reducing the illusion output probability, and in the pre-training stage and the reasoning generation stage, obtaining the illusion type of the large model. Parameters and generated contents of the large model are controlled, and the factuality and reliability of the generated contents of the large model are greatly improved while the generation capability of the large model is guaranteed.

The invention relates to the technical field of nodular cast iron, in particular to a silicon-molybdenum-chromium-nickel-niobium nodular cast iron material and a preparation method thereof. The material comprises the following chemical components in percentage by mass: 3.0%-3.5% of carbon, 4.3%-4.7% of silicon, 0.1%-0.3% of manganese, less than or equal to 0.05% of phosphorus, less than or equal to 0.02% of sulfur, 0.7%-1.0% of molybdenum, 0.6%-0.8% of chromium, 0.4%-0.7% of nickel, 0.3%-0.6% of niobium, 0.03%-0.06% of magnesium, 0.05%-0.1% of rare earth, 0.006%-0.012% of antimony and the balance of iron. The preparation method comprises the steps of smelting, first-time spheroidizing and inoculation, second-time spheroidizing, second-time inoculation and heat treatment in sequence. According to the obtained nodular cast iron material, the form of graphite and the number of graphite nodules are improved, carbon elements are separated out as many as possible in the form of high-carbon phase-spheroidal graphite, generation of pearlite is reduced, and the mechanical strength and high-temperature resistance of nodular cast iron are improved.

The invention relates to the technical field of high-chromium and high-molybdenum ferritic stainless steel, in particular to a preparation method of a high-chromium and high-molybdenum aluminum-containing ferritic stainless steel hot / cold-rolled plate. In order to solve the problems that in the prior art, in order to avoid brittle phase precipitation, the hot rolling and finish rolling temperature is high, and aluminum oxide particles and large-size carbon / nitride particles are likely to be formed, the novel preparation method of the high-chromium and high-molybdenum aluminum-containing ferrite stainless steel hot / cold-rolled sheet is provided. Comprising the following steps of smelting, casting, forging, hot rolling, annealing, acid pickling, cold rolling and recrystallization annealing, and through the forging process in the preparation method, large-size TiN and Ti / Nb (C, N) particles can be prevented from being formed; through the warm rolling process, a nanoscale Laves phase is separated out, meanwhile, a large deformation structure is formed, a large number of deformation microstructures such as shear bands and deformation bands are obtained, the problem of grain coarsening is solved, and the plasticity, toughness and corrosion resistance of the material are improved.

The invention relates to the technical field of daily chemicals, in particular to a white tomato whitening and repairing composition as well as a preparation method and application thereof. The composition comprises the following components in percentage by mass: 68-85% of jojoba oil, 10-25% of squalane and the balance of white tomato extract, wherein the total percentage is 100%. The white tomatoes are rich in colorless carotenoids (such as phytoene and tetrahydrolycopene), and have excellent antioxidant and whitening capabilities: melanin formation is inhibited, and the colorless carotenoids can inhibit tyrosinase activity, reduce melanin generation and fundamentally whiten the skin. Pigmentation caused by ultraviolet rays can be relieved through the anti-oxidation effect, and the color spots are prevented and faded. The skin color can be brightened after continuous use, so that the skin presents natural luster.

The invention provides a modified silicone oil agent with a comb-shaped structure as well as a preparation method and application thereof, the oil agent comprises an amino modified silicone oil emulsion and an epoxy modified silicone oil emulsion, and the mass ratio of the amino modified silicone oil emulsion to the epoxy modified silicone oil emulsion is 1: (0.5-1.5); the amino modified silicone oil emulsion and the epoxy group-containing modified silicone oil emulsion have comb-shaped structures, main chains of the amino modified silicone oil and the epoxy group-containing modified silicone oil are acrylate polymers, and branch chains are amino short silane chains or epoxy group-containing short silane chains; the preparation method of the oiling agent comprises the following steps: respectively preparing amino short-chain silicone oil and epoxy group-containing short-chain silicone oil, and then respectively synthesizing amino modified silicone oil emulsion and epoxy group-containing modified silicone oil emulsion. The acrylate polymer is introduced, the content of organic silicon is reduced, the viscosity of the oiling agent is small, carbon fibers are conveniently oiled, a protective film is formed on the fibers, friction and abrasion between the fibers are prevented, and therefore the surface defects of the carbon fibers are reduced.

The invention discloses an automatic causal structure generation method based on semantic representation and logical reasoning of a large language model. The method comprises the following steps: acquiring an input text; performing semantic coding and clustering on the obtained input text by utilizing a large language model, and establishing a candidate causal variable set; causal relationship detection is carried out on the established candidate causal variable set based on anti-fact intervention and do-calculation; performing causal direction judgment, and generating a directed acyclic causal graph meeting logic consistency; and on the basis of the generated directed acyclic causal graph, natural language interpretation is generated by using a large language model, and logic consistency closed-loop verification is carried out. According to the method, automatic generation from the natural language to the causal structure is realized, the causal variable set is automatically extracted and constructed from the unstructured natural language text, the defects that variables need to be manually defined and modeling depends on field experts in the existing causal modeling process are avoided, and the labor cost and professional threshold of causal structure construction are remarkably reduced.

The invention discloses a preparation method and application of a nano zero-valent iron-zeolite core-shell structure composite material, and relates to the technical field of nano zero-valent iron composite material preparation. A layer of zeolite core-shell structure is generated on the surface of the nano zero-valent iron to prevent iron oxide from being generated on the surface of nZVI to reduce the reaction activity, and meanwhile, the mass ratio of zeolite / zero-valent iron strongly affects gradual release of Fe < 2 + > in the nano zero-valent iron-zeolite core-shell structure composite material, so that iron core oxidation is slowed down, and the reaction activity of nZVI is improved. The release speed of electrons is also slowed down, the gradually released electrons form a long-time and stable activation effect on persulfate, and the degradation of trichlorophenol can be promoted. According to the preparation method and application of the nano zero-valent iron-zeolite core-shell structure composite material, the nano zero-valent iron-zeolite core-shell structure composite material can be obtained.

The invention relates to Bayer stone as well as a preparation method and application thereof, and belongs to the technical field of preparation of aluminum oxide or aluminum oxide precursor materials. The method comprises the following steps: mixing a Bayer stone seed crystal with an acidic aluminum source to obtain a first mixed solution; carrying out a neutralization reaction on the first mixed solution and sodium metaaluminate, and controlling the end point pH of the neutralization reaction to generate Alx (H2O) y (OH) mn < + > small clusters, so as to obtain a second mixed solution; and aging the second mixed solution at a set temperature, so that the Alx (H2O) y (OH) mn < + > small clusters are converted into a Bayer stone phase, and Bayer stone is obtained. The Bayer stone prepared by the invention meets the following indexes: the specific surface area is 325.3 m < 2 > / g to 382.3 m < 2 > / g, and the crystalline phase weight of the Bayer stone is 91.2 to 97.2 percent.

The invention discloses a nucleic acid tetrahedron DNA-quercetin compound and application of the nucleic acid tetrahedron DNA-quercetin compound in treatment of retinal neovascular diseases. In the nucleic acid tetrahedron DNA-quercetin compound disclosed by the invention, a quercetin molecule is connected to one single-stranded DNA of four single-stranded DNAs of a nucleic acid tetrahedron through an azide coupling reaction. The compound is stable in physical property, quantitatively carried quercetin molecules guarantee the stability of the treatment effect of the compound, generation of new vessels can be effectively prevented, remodeling of retina non-perfusion area vessels can be promoted, retina vascular injury can be recovered, a new strategy is provided for treatment and prevention of retina neovascular diseases, and the compound is worthy of popularization and application. Meanwhile, compared with tFNAs-QUE obtained through an existing electrostatic adsorption method, the tFNAs-QUE synthesized through the azide coupling method has a better treatment effect, pathological neovascularization is greatly reduced, and meanwhile generation of physiological blood vessels in a non-vascular region is obviously promoted.

The invention provides a solid electrolyte and a preparation method thereof, a diaphragm, a battery and power-related equipment, and relates to the technical field of lithium batteries. The solid electrolyte is of a core-shell composite structure with LATP as a core and Mg-Sn alloy as a shell wrapping the outer surface of the core. According to the solid electrolyte with the core-shell structure, the LATP serves as the core, the Mg-Sn alloy serves as the shell, air stability is enhanced, Li2CO3 impurities are prevented from being generated, high ionic conductivity and a wide electrochemical window are kept, and stability and mechanical strength are improved. The corrosion resistance and tear resistance of the alloy enhance the safety of the battery, and the aluminum element in the LATP improves the strength of the alloy and optimizes the performance and charge-discharge efficiency of the battery.

The invention relates to the technical field of green fuel preparation, and discloses a method for preparing green fuel by coupling biomass gasification and combustion, which comprises the following steps: (1) separating N2 from air, taking a part of residual gas as a gasification agent, and taking the other part as combustion gas; (2) carrying out chemical chain gasification on the biomass through steam under the condition of a gasifying agent to obtain H2 and CO2; (3) carrying out chemical looping combustion on the biomass under the conditions of an oxygen carrier and combustion gas to obtain CO2; (4) electrolyzing a part of obtained CO2 by using electric energy obtained by biomass chemical looping combustion to obtain CO; (5) synthesizing N2 and H2 to prepare a green NH3 product; and synthesizing H2, CO2 and CO to prepare a green methanol product. According to the method, a biomass fuel chemical looping power generation and biomass chemical looping gasification coupling technology is applied, a carbon source in biomass is fully utilized, meanwhile, green NH3 and methanol products are prepared, and efficient utilization of resources is achieved.

The invention relates to the technical field of hydrogen production, in particular to equipment for preparing hydrogen from biomass, a method for preparing hydrogen from biomass and application. The equipment comprises a biomass pretreatment system and a chemical-looping hydrogen production system, wherein the biomass pretreatment system comprises a drying unit, a crushing unit and a granulating unit; the chemical-looping hydrogen production system comprises a biomass hydrogen production reduction reactor, a hydrogen purification device and a dust remover; the dust remover is connected with a regeneration storage tank and an air oxidation reactor; the air oxidation reactor is connected with the biomass hydrogen production reduction reactor; the granulating unit is connected with the biomass hydrogen production reduction reactor; a first heat exchanger is arranged between a synthesis gas outlet of the biomass hydrogen production reduction reactor and the hydrogen purification device, and a water vapor outlet of the first heat exchanger is connected with the biomass hydrogen production reduction reactor; and an oxygen-poor waste gas outlet of the air oxidation reactor is connected with the drying unit. The equipment is simple in structure, waste heat is fully utilized, energy consumption is reduced, hydrogen purity and yield are improved, and carbon dioxide is captured.

The invention provides a music generation model training method and device, equipment and a storage medium, and relates to the technical field of computers, in particular to the technical fields of artificial intelligence, large models, deep learning, music generation and the like. According to the specific implementation scheme, a video sample is input into a to-be-trained first music generation model, and a first video vector output by the first music generation model and a corresponding music marking sequence are obtained; generating a music file based on the music mark sequence; calculating a loss function according to the video sample, the music file, the first video vector and the music mark sequence; and training the first music generation model based on the loss function to obtain a trained second music generation model. According to the invention, the model can be guided to generate music matched with the video content, and the diversity and quality of music generation are improved.

The invention relates to a cold precipitation-salting-out integrated ammonium chloride preparation method and system, which comprises the following steps: reducing the temperature of an ammonium chloride-containing solution generated in a combined alkali production process to below 10 DEG C, then adding sodium chloride into the solution while stirring until an ammonium chloride saturated salt solution is formed, standing, then cooling in a stepped manner, and after ammonium chloride crystals are completely separated out, obtaining ammonium chloride. And centrifuging to obtain an ammonium chloride product. Compared with a traditional separation preparation method of cold precipitation and salting-out in sequence, the method has the advantages that the ammonium chloride-containing solution generated in the combined alkali production process is subjected to cold precipitation and salting-out at the same time through one-step operation, so that the process flow is simplified, the time is greatly saved, the production efficiency and the yield are improved, the equipment investment is reduced, and the process operation cost is reduced; and the yield is improved.

The invention provides recombinant VII type collagen with a whitening effect as well as a preparation method and application thereof, and belongs to the technical field of bioengineering. Research finds that the recombinant VII type collagen with a whitening effect, the expression quantity of the recombinant VII type collagen is improved by taking a genetic engineering technology as a means, and expression production of the recombinant VII type collagen is carried out by using a pichia eukaryotic expression system; the recombinant VII type collagen disclosed by the invention is expressed in pichia pastoris, can be efficiently secreted and expressed outside cells, and is not easy to degrade in a purification stage, so that the purification difficulty is reduced; the recombinant VII type collagen has an excellent whitening effect, is suitable for sensitive skin, does not cause skin irritation, itching and scorching hot, and has good practicability.

The invention discloses a hot CO2-assisted electromagnetic heating in-situ carbon storage and hydrogen production synergistic method, belongs to the technical field of oil and gas reservoir in-situ carbon storage and hydrogen production, and solves the problem that CO2 and other gases can be generated during oxygen injection combustion reservoir in-situ hydrogen production at present. The method comprises the following steps: selecting a target reservoir, digging a well and distributing hydrogen production collaborative equipment, transforming and developing the target reservoir based on the type of the target reservoir, injecting high-temperature CO2, starting a microwave emission device of an electromagnetic heating hydrogen production and hydrogen production well to continuously heat the reservoir to a hydrogen production temperature, and keeping the current reservoir temperature and pressure condition to produce hydrogen. Starting an electromagnetic heating hydrogen production and hydrogen production well for production; closing the well to stop production when the hydrogen yield is rapidly reduced; according to the invention, the production of CO2 gas in the hydrogen production process is avoided, and multiple injection processes of oxygen-containing gas, water vapor and the like are simplified at the same time; the electromagnetic heating cost is reduced by injecting high-temperature CO2 to preheat the reservoir, and meanwhile, the utilization and geological storage of CO2 can be realized, so that the synergistic effect of geological storage of CO2 and in-situ hydrogen production is ensured.

The invention provides anti-scattering water-guided laser cutting fluid as well as a preparation method and application thereof. The anti-scattering water-guided laser cutting fluid comprises the following components in parts by weight: 0.1-1 part of an anti-scattering agent; 0.01 to 0.1 part of a foam discharging agent; 1-5 parts of a refractive index regulator; and 80-99 parts of ultrapure water. The anti-scattering agent is a polymer; the foam removing agent is one or more of hydroxymethyl cellulose, hydroxy propyl cellulose, sodium lignin sulfonate, potassium lignin sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt; the refractive index regulator is an iodine-containing compound and / or a fluorine-containing compound. According to the anti-scattering water-guided laser cutting fluid, light beam scattering and energy loss in the water-guided laser cutting process can be remarkably reduced, and the cutting precision and efficiency are improved. The anti-scattering water-guided laser cutting fluid has very good application prospects and large-scale industrial popularization potential in the field of water-guided laser cutting.

The invention relates to the technical field of organic silicon resin preparation, in particular to trapezoidal methyl silicon resin and a preparation method thereof.The trapezoidal methyl silicon resin is prepared by taking methyl trichlorosilane as a main raw material, introducing a trapezoidal control agent containing amido and alkoxy at the same time to inhibit the reaction activity of the methyl trichlorosilane and then carrying out hydrolysis reaction in a small amount of alcohol solvent and water; the generation of a cross-linked network structure insoluble substance during hydrolysis is avoided, and the resin gelation risk is effectively reduced. The hydrolysis rate is reduced, so that the use amount of the solvent is reduced, the proportion of alcohol in the water phase is greatly reduced, and the process and environmental protection cost is reduced. The trapezoidal methyl silicone resin prepared by the method is excellent in viscosity performance, high in yield, excellent in boiling resistance, short in curing time, high in resin softening point and short in gelation time.

The invention relates to the technical field of text-to-image generation, and discloses an open source technology Stable Diffusion-based text-to-image generation method, which comprises the following steps of: receiving text or image data input by a user and historical data accumulated by a sugar stacking community, including the historical image data accumulated by the sugar stacking community and image data uploaded by the user (under the condition that the user agrees); the method comprises the following steps: selecting a plurality of data sources and various public information sources, preprocessing input data, including data cleaning, duplicate removal, missing value processing, format conversion, standardization, normalization and other preprocessing steps, normalizing and standardizing numerical values to ensure the quality and consistency of the data, dividing the preprocessed data into a training set and a test set, and algorithm model training is carried out based on a Stable Diffusion model, including deep learning model training, evaluation of the trained model by using a test set, and optimization of the model according to an evaluation result, possibly including hyperparameter adjustment, regularization increase and other strategies.

The invention discloses a method for removing metal impurities through electrolytic coupling vacuum distillation of tin benzene sulfonate. The method comprises the following steps: step 1, preparing a liquid; step 2, preparing an electrolyte; step 3, electrolysis; 4, copper removal and refining; and step 5, vacuum distillation. According to the method, the crude tin is prepared into the electrolyte, the benzene sulfonate is added for electrolysis, the precipitation potential of lead and tin is changed, the impurity lead element with high difficulty is removed, other impurity elements in the crude tin can also be removed, the lead, copper and other impurity elements are further removed by combining copper removal refining and vacuum distillation, and the 5N or 6N standard high-purity tin is obtained. The content of the lead element and the content of the bismuth element are both smaller than 1 ppm, the content of the uranium element and the content of the thorium element are both smaller than 1 ppb, the requirement of a low-alpha-ray-dose material is met, the problem that radioactive alpha-particle impurity elements in crude tin are difficult to remove through an electrolytic method is effectively solved, the use requirement that the high-purity tin serves as a welding flux is met, and the quality of a semiconductor chip is greatly improved.

The utility model provides sodium hypochlorite disinfection equipment for sewage treatment, and relates to the technical field of sewage treatment.The sodium hypochlorite disinfection equipment comprises a disinfection box, a lamp box body is fixedly installed in the middles of the inner walls of the four sides of the disinfection box in a penetrating mode, and an auxiliary assembly is arranged in the disinfection box. According to the ultraviolet disinfection equipment for sewage treatment, the lamp box body is arranged, the side, close to the interior of the disinfection box, of the lamp box body is made of a transparent material, light rays of an ultraviolet lamp can conveniently irradiate the interior of the disinfection box, and an auxiliary assembly and a reciprocating lead screw are arranged to drive a scraping ring to slide on the inner wall of the disinfection box and the lamp box body in a reciprocating mode; the inner wall of the disinfection box and one side of the lamp box main body can be prevented from generating scale, and the problems that in the related technology, when sewage is disinfected through sodium hypochlorite, ultraviolet lamps are generally installed on the inner wall of the treatment box, sewage disinfection is enhanced, when the sewage is disinfected through the ultraviolet lamps, irradiation is needed for a certain time, scale is easily generated after long-time use, and the sewage disinfection effect is poor are solved. And the illumination effect of the ultraviolet lamp is influenced.

The energy-saving efficient pellet material drying, preheating and roasting production line comprises a chain grate machine, a rotary kiln and an annular cooler, a kiln head bin of the rotary kiln is connected with one end of an annular cooling bin of the annular cooler in a sealed mode, and an inclined sliding plate is arranged in the kiln head bin; high-temperature pellets in the rotary kiln fall onto the cooling conveying plate chain through the inclined sliding plate, a roundabout fresh air heat exchange channel is arranged in the inclined sliding plate, and fresh air enters the fresh air heat exchange channel through the fresh air guide-in pipe under the power of the fresh air conveying fan and then enters the cooling conveying plate chain through the fresh air guide-in pipe. Fresh air exchanges heat with the high-temperature pellets on the inclined sliding plate in the fresh air heat exchange channel, and after heat exchange, the fresh air is guided into the heat exchange fresh air drying section of the chain grate through the hot air conveying pipe to dry the green pellets. The inclined sliding plate is additionally arranged in the kiln head bin of the rotary kiln, has a material guiding function and can effectively prevent generation of hydrogen chloride gas in the chain grate; and more importantly, the drying efficiency of the chain grate machine is also improved.

The invention discloses a method for recovering scandium and titanium from Bayer process red mud. The method comprises the following steps: (1) drying the red mud; (2) mixing the dried red mud and phosphoric acid, performing acid leaching reaction, and then filtering and drying to obtain pretreated red mud; (3) carrying out acid leaching on the pretreated red mud by adopting a phosphoric acid-hydrogen peroxide system, and carrying out solid-liquid separation to obtain red mud leachate containing scandium and titanium and iron-rich leaching residues; (4) mixing the red mud lixivium containing scandium and titanium with a P204 extracting agent, stirring, oscillating and carrying out oil-water separation to obtain a scandium-loaded organic phase and a titanium-containing lixivium, and carrying out acid pickling on the organic phase for multiple times; and (5) adding ammonia water into the titanium leachate to adjust the pH value, heating and stirring, standing and precipitating to obtain amorphous titanium phosphate, and carrying out acid pickling after solid-liquid separation. According to the method, scandium and titanium in the red mud are separated and recycled in a two-stage acid leaching-extraction-precipitation combined mode. The selectivity of scandium and titanium is improved. And technical support is provided for recovery of scandium and titanium and comprehensive utilization of red mud.

The utility model provides a tunnel CO / VI lens dustproof and demisting device, which comprises a CO / VI host, a lens, a gold-plated reflector and dustproof covers, an air outlet disc is fixed between the lens and the dustproof cover on the lens and between the gold-plated reflector and the dustproof cover on the gold-plated reflector through a mounting plate respectively, and the two dustproof covers are externally provided with an anti-fogging and dedusting unit respectively; the air outlet disc is internally provided with a vent groove, the side face of the air outlet disc is provided with an air inlet communicated with the vent groove, and the surface, facing the interior of the dust cover, of the air outlet disc is provided with a plurality of evenly-distributed air outlet holes; the connection position of the air pipe and the shell is located on the face opposite to the open face, a control circuit board, a temperature and humidity sensor, a fan and a heating resistor are arranged in the shell, the control circuit board is electrically connected with the temperature and humidity sensor, the fan and the heating resistor, and the control circuit board is electrically connected with the CO / VI host.

The invention discloses a monocrystalline silicon alkali polishing additive with an inverted pyramid structure tower footing and application of the monocrystalline silicon alkali polishing additive. The monocrystalline silicon alkali polishing additive comprises, by mass, 1-2 parts of glue, 0.5-2 parts of sodium lignin sulfonate, 1-3 parts of quaternary ammonium salt, 0.1-0.3 part of sodium benzoate, 2-3 parts of DL-proline, 2-5 parts of other auxiliaries and the balance deionized water. By adding the additive disclosed by the invention into a polishing solution for alkali polishing of monocrystalline silicon, the reaction rate of a [111] / [100] surface can be changed, the reaction rate of a [110] surface can be increased, an inverted pyramid structure which is uniformly distributed and complete in structure can be formed on the back surface of the monocrystalline silicon, the roughness of the back surface of the monocrystalline silicon can be increased, on one hand, back slurry contact and slurry tension improvement are facilitated, and FF can be improved; and on the other hand, the double-sided rate of the photovoltaic module is improved, thereby improving the electrical performance of the battery piece.

The invention relates to a method for improving particles generated between an epitaxial cavity and an exchange cavity, and the method is characterized in that the method comprises the following stages: S100, in the first stage, removing oxides, raising the temperature in the epitaxial cavity to a preset temperature, and introducing hydrogen to remove the oxides on the surface of silicon; s200, second-stage impurity dissolution: introducing hydrogen chloride gas into the epitaxial cavity to dissolve metal impurities and part of impurities in the cavity; s300, performing third-stage cleaning, filling hydrogen into the epitaxial cavity, performing air exhaust treatment on the epitaxial cavity through a tail gas treatment device, removing reactants and impurities in the cavity, monitoring the pressure in the epitaxial cavity in real time, adjusting the air exhaust rate by using an air pump, ensuring that the pressure in the epitaxial cavity reaches 1.2 times of the pressure of an exchange cavity, preventing particles from migrating, and performing third-stage cleaning; and a gradual heating mode is adopted, so that oxides on the surface of the silicon wafer are completely removed, thermal stress is controlled within a preset range, and particle generation caused by temperature difference is avoided.

The invention discloses a preparation method of 2, 2, 4-trimethyl-1, 2-dihydroquinoline, and relates to a preparation method of 2, 2, 4-trimethyl-1, 2-dihydroquinoline. The method comprises the following steps: by taking o-aminoacetophenone and isobutenyl magnesium bromide as raw materials, reacting in the presence of a polymerization inhibitor and a solvent, then adding water to decompose, extracting, distilling to remove the solvent and lightly separating to obtain high-purity and high-yield 2, 2, 4-trimethyl-1, 2-dihydroquinoline. By adopting the method, carcinogenic primary amine impurities are not generated.

According to the SQL query optimization method and system based on deep reinforcement learning driving, in the stage that an optimizer generates a physical query execution plan, action screening and state regression technologies are combined, and the performance of a deep Q network is improved. And a more accurate Q value can be obtained by training the neural network by using the'action-state 'pair. Besides, by balancing the weight of the Q network and the weight of the dual-depth Q network, the error of a target estimation value is effectively reduced, so that more accurate Q value estimation is realized. After the method is adopted, the following technical effects are achieved: (1) flexible connection sequence optimization: deep reinforcement learning enables the action values of the target network and the evaluation network to be optimally updated by analyzing SQL query and dynamically adjusting the connection sequence; and (2) compared with the traditional method, the method not only can dynamically adjust the connection sequence in the query, but also can perform optimal selection according to reward feedback and historical data. According to the optimization strategy, the query time is remarkably shortened in complex multi-table connection query, the query execution efficiency is improved, and generation of a non-optimal plan is avoided.

The invention relates to the technical field of microorganisms, in particular to monascus for high-yield production of monascus and / or monascus flavin and application of the monascus, a new monascus strain with the preservation number of CGMCC NO.41335 and application of the new monascus strain in production of high-content monascus and / or monascus flavin and related products thereof. The strain is monascus purpureus ZYXQ-2206, can produce high-efficiency and non-toxic monascus and / or monascus flavin at high yield, and does not produce harmful and toxic components such as lovastatin and citrinin. Therefore, a monascus product produced by using the strain can effectively avoid safety risks, and has extremely high application prospects and market potential. By screening and optimizing a fermentation process, the invention provides the high-yield, non-toxic and high-functionality red yeast rice, and the red yeast rice has important application value in the field of development of lipid-lowering functional foods and nutritional health-care products.

The invention provides an inertia friction welding auxiliary machining device for dissimilar materials and a working method of the inertia friction welding auxiliary machining device, and belongs to the technical field of friction welding. The problem that in the prior art, the heat preservation effect cannot be improved at any time of welding according to the process requirement is solved. The device comprises a main shaft side box body, a main shaft side clamp, an external blowing assembly, a main shaft side to-be-welded piece, a movable sliding table box body, a lathe bed, a tailstock side clamp, a tailstock side to-be-welded piece and a heating mechanism, the main shaft side box body is installed on one side of the lathe bed, and the movable sliding table box body is installed on the other side of the lathe bed in a sliding mode through a movable sliding table rail; the main shaft side clamp is installed in the main shaft side box body through the main shaft fixing seat, the external blowing assembly is arranged on the outer side of a welding area of a main shaft side to-be-welded piece, the tailstock side clamp is installed in the movable sliding table box body through the tailstock fixing seat, and the heating mechanism is arranged on the outer side of the welding area of the tailstock side to-be-welded piece. The device is mainly used for protecting the welding area of friction welding.