585 results about "Liquid interface" patented technology

The invention discloses a gas self-excitation modulation device, an enhanced pollution aeration treatment system and an application method of the enhanced pollution aeration treatment system, through the arrangement of the gas self-excitation modulation device, intermittent modulation airflow matched with an orifice bubble generation process is formed, the instantaneous pulse acting force for upward separation of bubbles is increased, the bubble generation time is shortened, and the aeration bubble size is reduced; and the mass transfer rate of the gas-liquid interface is further improved. According to the invention, the existing laid aerator does not need to be replaced, the aerator material does not need to be modified, and the method is widely applicable to microporous aerators in any form; a water phase does not need to be driven to flow, so that energy consumption is greatly reduced, and adverse disturbance to a target water body is avoided; compared with a gas dissolving method and a jet flow air entraining method, the technology only drives a gas phase to enter a liquid phase, energy is saved, and meanwhile full-amount treatment of target liquid can be achieved. In addition, through sectional arrangement of the oscillation cavity self-excitation unit and the outflow unit, batch application can be carried out.

Provided in the present invention are a three-phase flow and heat transfer coupling simulation method and system based on an IBM-VOSET-DEM. The method comprises: determining a computational domain and dividing the grid of the computational domain; initializing parameters; reconstructing a liquid-liquid interface; determining a fluid volume fraction at an (n+1)th moment; determining a boundary grid, and determining a signed distance function of a grid cell at an nth moment; determining an interface curvature of the grid cell of the interface; smoothing abruptly changing physical quantities of the interface; determining the surface tension of the interface; determining a fluid intermediate velocity; obtaining fluid volume fractions and fluid intermediate velocities of all of the grid cells in the computational domain; determining the velocity of a particle; determining the displacement of a pth solid particle at the (n+1)th moment and a solid volume fraction of the grid cell at the (n+1)th moment; determining the final velocity of the computational domain at the (n+1)th moment; and solving for a temperature and an interface heat flux density. In the present invention, a DEM soft-sphere model is used to calculate a collision force of a solid, such that microscopic motion information of a solid particle can be accurately obtained and tracked; and an interface heat flux density model is used to take the conjugate heat transfer effect of an interface into consideration.

The present application provides a method for generating a micro-scale columnar high-speed acoustic beam in a liquid environment, comprising: a liquid environment; a high-frequency resonator, which generates 0.5-30 GHz ultrasonic waves to act on the liquid environment during operation, generating a directional fluid motion along the direction of propagation of the sound wave in the liquid at the solid-liquid interface, i.e., a columnar focused acoustic beam; the high-frequency resonator is driven to operate in at least one driving cycle with a first power, each driving cycle including a first stage and a second stage, the first stage driving the high-frequency resonator to operate, and the second stage stopping the driving; the magnitude of the first power causes the high-frequency resonator to generate an acoustic beam in the first stage; and the duration of the first stage at the first power is less than the second threshold or the duty cycle of the first stage in one driving cycle is less than the first threshold. Corresponding applications are also provided, such as a method for directional transport of liquids or particles in liquids, and a method for processing target objects.

The invention discloses a space variable gravity fluid storage tank in-orbit motion simulation experiment device in the technical field of space in-orbit fluid management, and the device comprises an experiment storage tank which is used for storing experiment fluid; the experiment storage box is transparent, so that a gas-liquid interface in the storage box can be observed outside the experiment storage box; the rotating mechanism is used for driving the experiment storage box to rotate so as to adjust the included angle between the experiment storage box and the centrifugal acceleration direction of the variable-gravity centrifugal platform and simulate the morphology change of a gas-liquid interface during rotating motion; the vibration mechanism is used for driving the experiment storage tank and the rotating mechanism to simultaneously perform linear reciprocating motion so as to apply translation and low-frequency vibration disturbance to the experiment storage tank and simulate the gas-liquid interface morphology change and instability phenomenon in the process that the gas-liquid interface is disturbed by external force; the experiment storage box, the rotating mechanism and the vibrating mechanism are all installed on the variable-gravity centrifugal platform.

The invention discloses a method and a device for growing a cadmium zinc telluride single crystal, and is characterized in that the method comprises the following steps: (1) putting a cadmium zinc telluride polycrystal ingot into a pyrolytic boron nitride crucible, the cadmium zinc telluride polycrystal ingot is obtained by a preset temperature gradient synthesis method, and has [111] crystal orientation cluster crystal grains in the growth direction; (2) putting the pyrolytic boron nitride crucible into a vacuum closed quartz container, controlling a six-temperature-zone growth furnace through a computer to complete the melting process of a polycrystalline material, and before formal growth, forming a solid-liquid interface distribution structure in which polycrystals are not melted and the rest parts are completely melted at the center of the bottom, wherein the diameter of the solid-liquid interface distribution structure is not less than 30mm; (3) after heat preservation is conducted for a preset time, two-step cooling is achieved in a VGF mode; in the first cooling stage, an initial temperature gradient is formed, and after heat preservation is conducted for a preset time, elimination, merging and growth of [111] crystal nuclei are completed; in the second cooling stage, stable and continuous propulsion of a solid-liquid interface is completed, and continuous growth of single crystals is achieved; and finally, cooling to room temperature to obtain the cadmium zinc telluride single crystal. According to the method, the effect of growing the cadmium zinc telluride crystal with high single crystal rate under the seed crystal-free condition is realized.

The invention relates to the technical field of chemical automation control, and discloses an intelligent closed-loop control system for producing p-dichlorobenzene by a biomass method, which comprises a signal acquisition module, a residence time reconstruction module, a thermal coupling analysis module, a parameter self-adaptive scheduling module and an execution control module. The rheological characteristics of raw materials are monitored by collecting the current of a stirring motor, the liquid level is dynamically increased through a retention time reconstruction module to prolong the retention time of the materials, and a liquid level periodic migration strategy is introduced to prevent scaling of a gas-liquid interface; the thermal coupling analysis module and the parameter self-adaptive scheduling module are used for calculating thermal retardation post factors, temperature control parameters are corrected in real time, the upper limit of cooling output is limited, inner wall supercooling crystallization is prevented, and the problems that the conversion rate is reduced, the heat transfer efficiency is reduced and equipment is hung on the wall due to viscosity fluctuation of biomass raw materials are effectively solved. And the self-adaptive stable control of the reaction process is realized.

A pervaporation composite membrane belongs to the technical field of membrane separation. The pervaporation composite membrane comprises a porous substrate, a middle membrane layer and a separation membrane layer which are sequentially stacked, the average pore size of the porous substrate is greater than or equal to 250nm; the average pore size and porosity of the middle film layer are smaller than those of the porous substrate, and the middle film layer has the organic matter affinity characteristic; the separation membrane layer has the hydrophobic characteristic and the organic matter selective permeation characteristic. The middle membrane layer is beneficial to improving the problems of seepage holes, difficulty in spreading, uncontrollable thickness of the separation membrane layer and the like in the solid-liquid interface preparation process, ensures the defect-free preparation of the separation membrane layer, and is beneficial to improving the permeability of the pervaporation composite membrane to organic matters.

The invention discloses a liquid hydrogen container heat leakage prediction and boost characteristic detection method and system. The method comprises the following steps: establishing a three-dimensional heat flow field model of a liquid hydrogen container; calculating the heat flow density of a gas-liquid interface based on the three-dimensional heat flow field model so as to adjust the liquid hydrogen evaporation capacity; total heat leakage is obtained through finite element simulation and experimental data collaborative calibration; calculating a static evaporation rate according to the total heat leakage; establishing a nonlinear mapping model of the static evaporation rate and the boost rate through a response surface regression method; the wall temperature distribution of the liquid hydrogen container is monitored in real time, thermophysical parameters are calibrated through the LSTM neural network by adopting a dynamic calibration algorithm, and the output result of the three-dimensional heat flow field model is corrected. By establishing a three-dimensional heat flow field model of the liquid hydrogen container, determining a nonlinear response relationship between the evaporation rate and the pressure rising rate of the liquid hydrogen container, and constructing a cloud-edge collaborative detection system, the heat leakage performance of the liquid hydrogen container is accurately predicted, and efficient pressure rising rate detection is realized.

The invention discloses a lubricant adsorption and friction regulation and control method based on molecular dynamics simulation, which comprises the following steps: S1, constructing a lubricant molecule and friction pair metal unit cell model, generating topological structure information based on a minimum structure unit, and constructing a lubrication system model with a sandwich structure; s2, giving force field parameters to the lubrication system model, and performing geometric structure optimization and dynamic relaxation; s3, giving surface charges to the upper and lower friction pairs for targeted adsorption simulation of the lubricant; and S4, applying uniformly distributed contact pressure and constant sliding speed to the upper friction pair to perform friction simulation of the lubrication system. According to the lubricant adsorption and friction regulation and control method based on molecular dynamics simulation, a targeted adsorption strategy of a solid-liquid interface is established, the microcosmic adsorption process of the lubricant is reproduced, controllable regulation of friction characteristics is achieved, the human resource cost in actual experiments is reduced, and manual operation errors are reduced.

The invention relates to a preparation method of a silicon single crystal rod and a silicon wafer. Comprising a melting stage, a temperature adjusting stage, a welding stage, a seeding stage, a shouldering stage, an equal-diameter stage, an ending stage and a breaking stage which are carried out in sequence, in the equal-diameter stage, the pulling speed is controlled to be within a first pulling speed range, and the solid-liquid interface temperature gradient is controlled to be within a first gradient range; wherein the range of the first pulling speed ranges from 0.5 mm / min to 1.1 mm / min; the first gradient range is 3 DEG C / cm to 5 DEG C / cm. By reducing the temperature gradient of a solid-liquid interface and lowering the crystal pulling rate, the stability of a thermal field is enhanced, and sufficient conditions are provided for the composite reaction of Sii and V, so that the impurity capturing efficiency is improved, the internal purity of the crystal is improved, and the impurities are effectively removed.

The invention discloses a laser continuous liquid interface additive manufacturing method and device for a rod piece, and the method comprises the steps: horizontally arranging a substrate for bearing a workpiece, and enabling a wire material to be perpendicular to the substrate from the upper part; the emergent angle of the laser excitation device is adjusted, so that the emitted laser obliquely irradiates the wire; starting a laser excitation device, wherein the laser power excited by the laser excitation device is P; the wire is fed downwards at the speed of V1, the substrate moves at the speed of V2, and the laser irradiation position is kept unchanged, so that the wire is melted between the substrate or the formed rod piece and the tail end of the wire to form a continuous liquid interface; and the wire is fed downwards at the speed V1, the substrate moves at the speed V2, and the laser power irradiation position is kept unchanged until the rod piece reaches the target length. And melting the wire through laser to enable the wire to form a continuous liquid interface between the base plate or the formed rod piece and the tail end of the wire so as to manufacture the rod piece.

The invention provides a gas-liquid interface identification and ship sloshing liquid level correction method and system, and the method comprises the steps: extracting image edge and gray texture features, achieving the state identification of a liquid-gas interface through a lightweight convolutional neural network model, and dynamically generating a collection strategy according to the state identification; then collecting original liquid level signals and synchronously obtaining IMU data, extracting a multi-mode component through signal decomposition, constructing a disturbance recognition model by combining an IMU, filtering disturbance related components and reconstructing a stable liquid level; and further modeling the disturbance component into a residual sequence, realizing disturbance trend prediction and liquid level dynamic correction by using a time sequence prediction model, and outputting more stable and reliable liquid level data. The problem that liquid level measurement is unstable in the LNG ship sloshing environment can be effectively solved, image recognition and IMU data are fused, liquid level disturbance suppression and dynamic correction are achieved, and the method has the advantages of being self-adaptive, resistant to interference, stable in measurement and the like and is suitable for high-precision liquid level monitoring under the complex working condition.

The invention provides a horizontal coalescence phase splitter suitable for phase-change absorbent lean and rich liquid phase splitting. The horizontal coalescence phase splitter sequentially comprises a section I phase splitting buffer area, a section II coalescence phase splitting area and a section III gravity phase splitting area in the fluid flowing direction. The I-section split-phase buffer area is provided with a tangential feeding hole and a flow guide baffle plate; the section II coalescence split-phase area is filled with stainless steel mesh coalescence filler subjected to composite modification of AP adhesive and nano Al2O3; and a heavy phase outlet and a light phase outlet are formed in the section III gravity phase-splitting area. According to the horizontal phase splitter, the gas-liquid interface area is large, the gas-liquid movement directions are perpendicular to each other, gas-liquid phase balance is facilitated, and the separation effect is better; in addition, the liquid level is stable, when the incoming liquid flow changes, the liquid level change of the horizontal separator is small, the buffering capacity is high, and stable flow can be provided for downstream equipment; in addition, by adding the composite modified stainless steel mesh coalescence filler into the phase splitter, tiny liquid drops can be effectively captured and coalesced, the separation effect is further improved, and comprehensive liquid-liquid separation is achieved.

The invention discloses a sediment type salt cavern gas storage gas-liquid interface depth prediction method. The method comprises the following steps that S1, a change curve of brine discharge flow along with time is obtained through on-site monitoring; s2, determining the mining form of the salt cavern cavity, and obtaining a change curve of the effective cross section area of the cavity brine along with the depth; s3, respectively calculating gas-liquid interface depths when the gas-liquid interface is in the gas injection well and does not enter the salt cavity, when the gas-liquid interface is in the pure brine space at the upper part of the salt cavity and does not enter sediment, and when the gas-liquid interface is in the sediment accumulation space; s4, judging whether the gas-liquid interface depth obtained through calculation in S3 meets a corresponding application interval or not, and obtaining a gas-liquid interface depth value; the gas-liquid interface depth of the pure brine space on the upper portion of the salt cavern can be detected, the gas-liquid interface depth of the sediment accumulation space can also be detected, and gas-liquid interface depth detection of the whole space of the inner cavity of the sediment type salt cavern gas storage is achieved.

The invention discloses a high-efficiency short-process production method and production system for carbonization-process white carbon black, an absorption reaction is completed in a normal-pressure gas-liquid small-sized carbonization reaction kettle, and rapid continuous reaction of CO2 gas and liquid sodium silicate in the carbonization reaction kettle is realized through high-strength stirring and gas-liquid interface contact enhanced absorption; and high-efficiency absorption of carbon dioxide is realized under normal-pressure reaction conditions. The carbonization reaction is carried out in a small-sized carbonization reaction kettle, the precipitation reaction can be carried out in a large-sized precipitation reaction kettle according to the scale, the solid-liquid reaction is carried out in the precipitation reaction kettle, and the silicon dioxide micro particles generated by the absorption reaction are subjected to uniform mixing by controlling the reaction time, the reaction temperature and the reaction pH value. The particles are further aggregated and grown to form the silicon dioxide particles with stable structure and reliable performance, the structure is stable, the performance is reliable, and the utilization efficiency of raw materials is improved.

The invention discloses an off-axis visual quantitative observation experiment storage tank in the technical field of space on-orbit fluid management, which comprises an upper half storage tank and a lower half storage tank which are fixedly connected, and a sealing ring is arranged between the upper half storage tank and the lower half storage tank; box bodies of the upper half storage box and the lower half storage box are made of transparent materials, so that the gas-liquid interface morphology in the box bodies can be observed outside the box bodies; the volume of the upper half storage tank is larger than that of the lower half storage tank, so that the center of the experimental storage tank is positioned in the upper half storage tank, and the gas-liquid interface morphology at the maximum axial section of the center in the experimental storage tank can be observed from the upper part of the experimental storage tank; a liquid inlet and a liquid outlet of the experiment storage tank are formed in the lower half storage tank, so that observation sight is prevented from being blocked.

The invention belongs to the technical field of surface enhanced Raman spectroscopy, and particularly relates to a high-activity surface enhanced Raman scattering substrate as well as a preparation method and application thereof. Comprising the following steps: by utilizing a three-phase liquid-liquid interface self-assembly method, adding dichloromethane into an AuNPs dispersion liquid, uniformly mixing, adding a halide salt solution, uniformly mixing to form a mixed solution, then adding normal hexane into the mixed solution, standing, performing interface self-assembly until a gold nano-film is formed on a liquid surface, fishing out the gold nano-film, and drying to obtain the gold nano-film. The high-activity surface enhanced Raman scattering substrate is obtained. According to the method, the halide salt solution is innovatively introduced in the self-assembly process of the AuNPs, so that the assembly arrangement mode of the AuNPs is remarkably changed, the AuNPs are arranged more tightly, local surface plasma resonance coupling is enhanced, more hot spot areas are generated in a unit area, and the sensitivity of the self-assembly nano array SERS substrate is effectively improved.

The invention provides a single crystal furnace crystal pulling ending parameter control method and system based on adaptive regulation, and the method comprises the steps: collecting production data and parameter data of an ending starting point through a distributed sensor network and a processing equipment interface, and processing the data to obtain current state data of a crystal; and performing similarity comparison on the current state data of the crystal to obtain initial process parameters of the ending stage, and deducing and predicting state expectation evolution data of the crystal in the ending process based on the current state data of the crystal and the initial process parameters. According to the method, through the synergistic effect of full-state perception, foresight deduction, risk quantification and self-adaptive regulation and control, the bubble capture risk index is stably controlled to be 0.5 or below, the stability of a solid-liquid interface in the ending stage is improved, the technological process is not affected by the experience level of operators, and the optical uniformity consistency between batches is greatly improved.

The invention discloses an analysis method for falling film evaporation of a horizontal pipe, which comprises the following steps: S1, establishing a geometric model of the horizontal pipe, and simulating a gas-liquid interface; s2, based on the simulated gas-liquid interface, establishing a turbulence model for the liquid outside the horizontal pipe; and S3, based on the gas-liquid interface and the turbulence model, performing heat conduction simulation to obtain a simulation model of horizontal tube falling film evaporation. According to the analysis method, software is used for carrying out simulation research on the flow characteristic and the heat exchange characteristic in the horizontal pipe outer falling film evaporation process, a VOF method is combined with a UDF (User Defined Function) program, a gas-liquid interface and a turbulence model are simulated through a geometric model, and the flow characteristic and the heat exchange characteristic of the horizontal pipe outer falling film evaporation process are analyzed. The method can effectively explore the influence of different surface structures (such as fin structures with circular arc, trapezoid, triangle and the like) of the evaporation pipe on the falling film flow evaporation characteristic outside the horizontal pipe, so that a user can conveniently design the fin structures of the horizontal pipe according to own requirements, and the optimal design of the horizontal pipe is realized.

A crystal pulling method and system for fabricating a large-diameter silicon single crystal, and a silicon single crystal and a medium. The method can comprise: performing global two-dimensional simulation on a crystal pulling process, and acquiring a global temperature distribution, a velocity field distribution and an initial solid-liquid interface value during the crystal pulling process under a preset crystal pulling apparatus and a preset crystal pulling parameter; on the basis of the global temperature distribution and the velocity field distribution, determining a boundary condition, and on the basis of the boundary condition, performing local three-dimensional simulation on the crystal pulling process to determine a target solid-liquid interface value; adjusting the preset crystal pulling parameter until the initial solid-liquid interface value is equal to the target solid-liquid interface value within a threshold range, and using the adjusted preset crystal pulling parameter as a reference crystal pulling parameter; on the basis of the reference crystal pulling parameter, simulating and calculating a simulated defect during the crystal pulling process; on the basis of the simulated defect, iteratively optimizing the reference crystal pulling parameter until the simulated defect meets a preset condition, and using the optimized reference crystal pulling parameter as a target crystal pulling parameter; and fabricating a defect-free silicon single crystal.

The invention discloses a multi-scale research method for improving the separation efficiency of impurities in an ultra-pure metal system. The multi-scale research method comprises the following steps that tellurium crystals are prepared through a zone melting method, and purity and crystal face orientation analysis is conducted; simulation analysis is carried out in combination with experimental data, firstly, phase field simulation is used for analyzing conversion of an interface structure and grain competition-driven orientation in the solidification process, then the density functional theory is used for calculating and analyzing adsorption energy of solid phases on different crystal faces at the solid-liquid interface to impurity atoms, and the structure-activity relationship between crystal face orientation and impurity separation efficiency is obtained. Finally, the crystal face and the preferred orientation degree of the tellurium crystal are regulated and controlled through a Bridgman method, and the impurity separation efficiency is improved. By means of the mode, the key factors influencing trace impurity atom separation can be obtained, the universal method for improving the impurity separation efficiency in the ultra-pure metal system is obtained, and development of the non-ferrous metal metallurgy field is promoted.

The invention discloses a near-wall single-cavity collapse numerical simulation method and device coupled with boundary motion, and the method comprises the steps: 1, introducing a near-wall single-cavity physical model into a pre-constructed external flow field, and obtaining a corresponding flow field physical model; step 2, carrying out grid division on the flow field physical model; setting an initial condition and a flow field boundary condition, and setting a time step length meeting a calculation requirement; 3, setting specific calculation parameters in the process of solving the flow field, and introducing a fluid volume method to capture a gas-liquid interface; and 4, applying wall surface vibration in the form of a user-defined function, and simulating cavitation dynamic behaviors under vibration impact. According to the method, the influence of wall surface vibration is considered in the numerical simulation process in a mode of coupling boundary motion, the simulation of the dynamic behavior of the near-wall single cavitation bubble under the vibration impact condition is realized, and the influence of conditions such as vibration frequency on the cavitation bubble collapse process can be further explored on the basis; and theoretical guidance is provided for optimized cavitation inhibition design.

The invention provides an ultrasonic gas-liquid interface detection system and method based on frequency tracking, and relates to the technical field of gas-liquid interface detection.The system comprises an ultrasonic transducer, and a probe of the ultrasonic transducer is arranged on a to-be-detected gas-liquid interface; the signal generation module is electrically connected with the ultrasonic transducer; the motor driving module is electrically connected with the motor, and the ultrasonic transducer is fixed on an output shaft of the motor; the signal acquisition module is electrically connected with the ultrasonic transducer and is used for acquiring working current and working voltage of the ultrasonic transducer; a frequency tracking module; a control system module; the signal generation module, the motor driving module, the signal acquisition module and the frequency tracking module are electrically connected with the control system module. The control system module performs phase difference detection according to the working current and the working voltage acquired by the signal acquisition module, and controls whether the resonant frequency emitted by the frequency tracking module is changed or not to judge whether the probe reaches the gas-liquid interface to be detected, so that the liquid level can be efficiently and sensitively detected.

The invention discloses a porous rock multiphase fluid lattice Boltzmann simulation method based on GPU acceleration, and belongs to the technical field of computational fluid mechanics, a D3019 speed discrete model is utilized to identify porous rock to obtain a digital core model, a speed direction and a weight coefficient are defined, a distribution function is defined by means of an LBM method, and a multi-phase fluid lattice Boltzmann simulation model is obtained. Calculating a macroscopic physical quantity by utilizing a relation between a distribution function and a velocity moment, respectively describing a gas-liquid interface and a complex boundary of the porous rock by virtue of a scalar tracer function and a step function, and constructing a physical model; constructing an equilibrium state distribution function, performing LB equation calculation by adopting a forming schema equation under an external force, constructing a pseudo-potential multiphase model by virtue of a Shang-Chen potential energy formula, and processing the solid-liquid boundary of the porous rock by using a semi-rebound format; and carrying out a numerical solution pseudo code process based on the lattice Boltzmann method. According to the method, the characteristics of multithreading, memory sharing and the like of GPU hardware are fully utilized under the LBM framework, and the steps of the core algorithm are highly parallelized, so that high-performance calculation is realized.

The invention relates to a 4-inch low-dislocation indium antimonide lt; 211gt, 211gt; the invention discloses a preparation method of directional single crystals and belongs to the technical field of photoelectric materials. According to the method, a Czochralski method is adopted to grow the single crystal, a resistance furnace is arranged on the periphery of an induction coil of a heating device, and by accurately controlling heating conditions, designing a proper temperature field in a growth chamber and further combining growth conditions such as the state of a solid-liquid interface, the pulling speed, the rotating speed and particularly the shoulder expanding angle in the crystal growth process, the single crystal is obtained. The longitudinal temperature gradient in the crystal growth process is reduced, and the dislocation density of the large-size indium antimonide single crystal with the diameter of 4 inches can be obviously reduced, so that indium antimonide is enabled to be lt; 211gt, 211gt; the dislocation density of the directional single crystal is less than 100 / cm < 2 >.

The invention discloses an oxygen-enriched destressing crystal growth method and a crystal growth furnace, and relates to the technical field of crystal growth, and the oxygen-enriched destressing crystal growth method comprises the following steps: step 1, pre-treating a PMNT polycrystal material, and putting the pretreated PMNT polycrystal material into a crucible; 2, pre-flushing the growth furnace and creating an oxygen partial pressure environment; 3, raising the temperature in the growth furnace to melt and homogenize the PMNT polycrystal material in the crucible; step 4, the crucible moves downwards for directional solidification of the crystal, a solid-liquid interface is formed and stably moves upwards, and in the process, a dynamic regulation and control strategy is adopted in the growth furnace to control an oxygen-enriched environment to promote crystal growth, so that the crystal digests growth stress in the growth process, and formation of oxygen vacancies is inhibited; and step 5, after crystal growth is finished, gradient cooling is performed to room temperature in an oxygen-enriched environment, and a crystal ingot is obtained. Oxygen is used as a regulation and control tool, the stress problem caused by oxygen vacancy is physically solved, the color center and performance problems caused by oxygen vacancy are chemically solved, and the crystal growth quality is improved.

The invention discloses a method for refining nano ceramic synergistic modified Al-Si alloy primary silicon based on laser additive manufacturing, which comprises the following steps of: uniformly mixing Al-Si alloy powder with TiB2 and Al2O3 nano ceramic under the protection of inert gas through a ball mill by adopting a ball milling process to obtain ceramic nano strength enhanced Al-Si alloy composite powder; and the nano ceramic modified Al-Si alloy powder is fused layer by layer through laser powder bed fusion forming equipment, and a to-be-established target part is formed. According to the method, when the nano-ceramic reinforced Al-Si alloy melt is solidified, Al2O3 nano-particles are similar to a Si crystal structure and have a good interface coherence relation to serve as heterogeneous nucleation points of primary silicon, the nucleation rate of the primary silicon is increased, and the size of the primary silicon is refined; the TiB2 nanoparticles are distributed on a solid-liquid interface, Si atoms can be prevented from diffusing and gathering towards Si-Si clusters to a certain extent, growth of a primary silicon phase is inhibited, morphology regularization and size refinement of primary silicon are promoted, meanwhile, matrix grains can be effectively improved, and the mechanical property of the Al-Si alloy is remarkably improved.

The invention provides a thermal response hydrogel construction method based on solid-liquid interface repulsive force and water content, which comprises the following steps: establishing a coarse graining model of a thermal response polymer network and a water molecule system, and constructing a three-dimensional polymer gel network by adjusting the number of polymer chain monomers and the proportion of a cross-linking agent; constructing a simulation box according to the network geometric dimension and filling the simulation box with water beads; defining interaction parameters among beads under the dissipative particle dynamics model, performing molecular dynamics simulation, counting the mass center of a polymer skeleton and the number of water beads adjacent to an interface, and calculating the equilibrium moisture content; establishing a solid-liquid interface model, and calculating an equilibrium distance and interaction energy between a water bead plane and a polymer skeleton plane at the adsorption temperature; the network polymerization degree is optimized by adjusting the number of polymer chain monomers, and the optimal design of the thermal response desorption performance is achieved. The method provided by the invention is suitable for macroscopic hydrogel structure evaluation, can quickly obtain equilibrium moisture content and interfacial interaction energy, and guides reasonable proportioning and preparation of the hydrogel.

The invention discloses a method for rapidly constructing a large-area superlattice single-layer film and a product and application of the large-area superlattice single-layer film, and belongs to the technical field of nanometers.The method comprises the steps that nanoparticles in a nanoparticle solution are subjected to functional modification through perfluorinated molecules, and a mixed solution containing n-hexane is prepared; the mixed solution is injected into a water or alcohol solvent system for self-assembly, water-bath heating is assisted in the self-assembly process, the water-bath heating condition is 40-85 DEG C, and after n-hexane is completely volatilized, a nano-particle superlattice single-layer film is prepared on a liquid-liquid interface; the method is simple and controllable in process, high in preparation speed and good in universality, and the prepared nanoparticle superlattice monolayer film is good in orderliness and has a macroscopic large area.

The invention discloses an in-cylinder oil-gas mixing optimization method based on a liquid drop phase change state in a high-density environment, and belongs to the technical field of in-cylinder oil-gas mixing, and the specific process is as follows: step 1, selecting an alkane component of which the density monotonically changes in a gas-liquid interface in a binary mixture as a reference component; 2, calculating density distribution and influence parameters of reference components in the normal direction of the gas-liquid interface; step 3, according to the density distribution of the reference component in the normal direction of the gas-liquid interface, calculating to obtain the characteristic interface thickness and surface tension of the gas-liquid interface; 4, calculating an average molecular free path and a Knudsen number according to the interface temperature, the equilibrium pressure and the average molecular hard sphere diameter; 5, jointly predicting the evolution of a gas-liquid interface space structure through the interface thickness, the surface tension, the average molecular free path and the Knudsen number; and 6, when the predicted result in the step 5 is that supercritical phase change of the liquid drops occurs, the Reynolds number of airflow in the cylinder is increased, and oil-gas mixing in the cylinder is optimized.