475 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 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 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 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.

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 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 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 relates to a theoretical research method of an ultrafast laser ablation mechanism, which comprises the following steps of: creating a double-temperature model for solving the change of electron and lattice temperatures along with time by adopting a finite difference method; in order to further explain a removal mechanism of a macroscopic material, a fluid mechanics model is established, a solid-liquid interface is tracked by a thermal enthalpy-pore method, a liquid-gas interface is tracked by a level set method, and the influence of backflushing pressure, surface tension, gravity and a Margoney effect on a molten pool is considered; and solving a Navier-Stokes equation set and a level set equation to obtain a solid-liquid-gas three-phase fluid mechanics model. The lattice temperature obtained by the double-temperature model is used as a heat source to be input into the fluid dynamic model, and the process of molten pool flowing and metal steam eruption is obtained. According to the method, the whole femtosecond laser ablation process is simulated by using a simulation method. Compared with an experimental method, on one hand, the time and the cost are greatly saved, and on the other hand, the problem that the temperature change of the femtosecond scale cannot be accurately measured by the current characterization means is also avoided.

The invention discloses a control method for optimizing a solid / liquid interface of a solution in indium Czochralski purification based on numerical simulation, belongs to the technical field of preparation of high-purity metal materials, and obtains a process regulation and control scheme for stabilizing the solid / liquid interface of the solution through an external magnetic field and establishment of a mapping relation of process parameters-interface data-impurity concentration based on multi-physics field numerical simulation. The method comprises the following steps: acquiring original physical property data of the czochralski furnace and indium, calculating a geometric model, performing mesh generation, and establishing a mathematical model; based on historical experimental data, boundary conditions are set, and the key processes of indium czochralski purification seeding, shouldering and equal diameter are simulated; coupling multiple physical fields, and analyzing the change of a solid / liquid interface of the solution in the direct pulling process; and on the basis of a numerical simulation result, a deep reinforcement learning model is constructed, a mapping relation among process parameters, interface data and impurity concentration is established, 'prediction-verification-optimization 'closed-loop iteration of the process is realized, and collaborative regulation process parameters for stably preparing 8N high-purity indium are obtained.

The embodiment of the invention provides a crystal pulling heating power regulation and control method, device and equipment and a storage medium, and belongs to the technical field of monocrystalline silicon material production. The method comprises the steps that real-time crystal pulling parameters are obtained, wherein the real-time crystal pulling parameters comprise the real-time residual material weight and the real-time crystal pulling speed; based on the real-time residual material weight, the real-time crystal pulling speed and a pre-constructed mapping table, the current heating compensation power is determined, the current crystal pulling heating power is regulated and controlled through the heating compensation power, and the mapping table comprises the mapping relation of the residual material weight, the crystal pulling speed and the compensation power. According to the invention, based on the real-time crystal pulling parameters, the proper current heating compensation power can be rapidly determined by using the pre-constructed mapping table, so that the crystal pulling heating power is regulated and controlled to maintain the solid-liquid interface temperature of the silicon material in the crucible, the stability of the crystal pulling process is improved, and the occurrence of abnormal crystal pulling is reduced.

The present invention discloses a bionic regulation method for a number of bounces of a droplet on a metal surface based on acoustic in-situ monitoring, which comprises the following steps: obtaining dynamic contact characteristics and acoustic properties of a solid-liquid interface of metal superhydrophobic surfaces with different surface information in the droplet bounce process based on an optical-acoustic synchronous in-situ testing system for droplet bounces; and obtaining a correlation among the metal superhydrophobic surface, the acoustic response and the droplet bounce behavior based on the dynamic contact characteristics and the acoustic properties of the solid-liquid interface, and machining and modifying a micro-nano structure of the metal surface by combining a coupled bionic concept according to the correlation. A scientific basis and a novel design method are provided for the bionic regulation of the number of droplet bounces over the metal surface.

The embodiment of the invention provides a crystal doping concentration detection method and device and a silicon rod drawing method and device. The detection method comprises the following steps: acquiring the concentration of a dopant in gas on the surface of a silicon liquid, and acquiring the temperature of the surface of the silicon liquid; and determining the doping concentration of the crystal at the solid-liquid interface of the silicon liquid according to the concentration of the dopant in the gas and the temperature. In the embodiment of the invention, through real-time measurement of the doping concentration of the crystals at the solid-liquid interface, the doping proportion of the added materials can be adjusted, so that the resistivity of the head of the single crystal silicon rod is controlled within a proper range, and the yield and the resistivity concentration ratio of the single crystal silicon rod are improved.

The invention relates to the technical field of solid-liquid interfaces and liquid drop movement and control, in particular to a method and device for achieving left-right controllable spontaneous rotation of liquid drops based on light induction, and the method comprises the following steps that acid liquid drops containing photoacid are dropwise added to the surface of liquid metal; a light source system is adopted to irradiate liquid drops on one side of the liquid drops, the liquid drops are induced to locally release non-uniform H < + > ions, and interface chemistry is initiated to generate gradient change distribution; the light intensity generated by the light source system promotes the formation of asymmetric tension distribution on the liquid drop and liquid metal interface, and drives the liquid drop to rotate along a preset direction; and by changing the irradiation position, the liquid drops can be switched between left rotation and right rotation. According to the present invention, by using the mechanism of combining the interface Marangoni effect and the light-induced acidity regulation and control, the stable and rapid spinning behavior of the liquid drop can be represented by adjusting the position, the irradiation time and the irradiation intensity of the illumination region, and the rotation direction can be reversibly switched between the left rotation and the right rotation.

The invention provides a multifunctional experimental system for simulating migration and transformation of micro-plastics in a landfill environment, comprising: a columnar migration device filled with a landfill soil medium, the bottom of which is provided with a liquid inlet interface and a gas-liquid interface, and the top of which is provided with a liquid outlet; the liquid inlet system is connected to the liquid inlet connector through a first peristaltic pump; the temperature control module comprises a flexible heating film arranged around the outer wall of the columnar migration device and a temperature controller, and the flexible heating film is connected with the temperature controller through a temperature control connector, an integrated heating element and a wire; the micro-nano bubble generating device comprises a CH4 gas cylinder, a pressure reducing valve and a micro-nano bubble generator which are connected in sequence, a micro-bubble aeration head is arranged on the micro-nano bubble generator, the micro-bubble aeration head is partially and directly immersed in a preset water body, a high-dispersity bubble water solution is generated under a gas-liquid interface, and the CH4 gas cylinder is used for generating CH4 gas. The gas is quantitatively conveyed to the bottom of the columnar migration device through a second peristaltic pump connected to the downstream, and the dissolution of the landfill gas in the pore water and the gas-liquid interface action are simulated.

The utility model belongs to the technical field of gas purification crude benzene production, and particularly relates to liquid-liquid separation equipment with a visual interface, which comprises a tank body and a window, and is characterized in that the length of the window accounts for more than 30% of the height of the tank body, and the window comprises a transparent safety glass sheet, a flange and a gasket, the transparent safety glass sheet is located on the outer surface or the inner surface of the tank body, gaskets and flanges are sequentially arranged on the two sides of the transparent safety glass sheet and connected through bolts, one or two LED lamp strips are arranged along the long edge of the transparent safety glass sheet, the LED lamp strips are connected with a lighting power source, and a lighting switch is arranged near the window; under the irradiation of the LED lamp strip, light rays respectively act with the light-phase liquid and the heavy-phase liquid to generate chromatic aberration, so that a liquid-liquid interface is highlighted and is easy to identify. The liquid-liquid separator has the beneficial effects that the equipment has all normal functions of the liquid-liquid separator and is not influenced by time and regions, and the interface of the separator can be observed at any time and is clear and easy to judge.

The utility model discloses a device for eliminating fine crystals in a sodium sulfate cooling crystallization process, which is characterized in that a #-shaped partition plate is arranged below a top cover of a crystallizer, a cross-shaped flow channel formed in an inner baffle of the partition plate comprises radial branches, each radial branch is provided with a fine crystal liquid interface, a hot material liquid backflow interface and a circulating liquid interface, each fine crystal liquid interface is close to the center of the top cover, and each hot material liquid interface is close to the center of the top cover. A hot material liquid backflow connector is arranged on the outer side of the crystallizer and is close to the inner wall of the crystallizer; each fine crystal liquid interface is connected with an inlet pipeline of the fine crystal circulating pump, an outlet of the fine crystal circulating pump is connected with a tube pass inlet of the heat exchanger, and a tube pass outlet of the heat exchanger is connected with the hot material liquid backflow interface; each circulating liquid interface is connected with a suction port pipeline of a feed liquid circulating pump, an outlet of the feed liquid circulating pump is connected with a tube pass inlet of an external cooler, a tube pass outlet of the external cooler and a sodium sulfate solution feeding pipe are jointly connected with a feeding port of a crystallizer, and a crystal mush outlet is formed in the lower part of the side wall of the crystallizer. The device can improve the particle size of product cooling crystallization and prolong the cleaning period of the external cooler.

The invention discloses an indium phosphide single crystal growth dynamic thermal field control method based on AI calibration of multiple temperature zones, and relates to the technical field of semiconductor material preparation and artificial intelligence control. According to the method, a multi-temperature-zone thermal field digital twin model is constructed, multi-channel temperature data, heating power data and crystal growth image data in an indium phosphide single crystal growth furnace are collected, and real-time three-dimensional reconstruction of thermal field distribution in the furnace is carried out; with the crystal growth rate, the solid-liquid interface shape and the thermal stress distribution as optimization targets, power adjustment instructions of heaters in all temperature zones are output; an AI calibration module is introduced to correct thermophysical parameters of the digital twin model; deducing a thermal field state at a future moment, compensating a thermal hysteresis effect in advance, and realizing accurate closed-loop control of an indium phosphide single crystal growth process; according to the invention, the problem that the traditional PID control is difficult to cope with nonlinear, strong-coupling and large-lag thermal field change in large-size crystal growth is solved, and the single crystal yield and the lattice quality are remarkably improved.

The invention belongs to the technical field of photoelectrochemical interface kinetics, and discloses a method for in-situ determination of interface charge transfer kinetics, which comprises the following steps: (1) constructing a photoelectrochemical reaction solution, and forming a solid-liquid interface; (2) obtaining a current approximation curve of the current changing along with the position of the probe; (3) applying vertically incident light to the solid-liquid interface, and applying different potentials to the second working electrode to obtain at least five current feedback approximation curves of current changing along with the position of the probe under different second working electrode potential settings; and (4) obtaining a change relationship between different second working electrode potentials and heterogeneous effective charge transfer rate constants obtained by fitting, and thus obtaining a photon-generated carrier exchange rate constant at a solid-liquid interface. According to the invention, quantitative acquisition of solid / liquid interface reaction kinetics information can be conveniently realized, and interface charge transfer kinetics mechanism research in photoelectrocatalysis and optimization of process properties of related devices can be promoted.

The invention discloses a preparation method of a metal chalcogenide crystal film, and belongs to the field of semiconductors. According to the preparation method of the metal chalcogenide crystal thin film, the liquid metal is placed in the reaction tank, so that trace metal atoms generated by the surrounding liquid metal can be additionally introduced into the reaction tank where the metal chalcogenide amorphous thin film is located during annealing; the metal-rich liquid interface can be formed on the metal chalcogenide amorphous film, the metal chalcogenide amorphous film can be promoted to be recrystallized into a crystal structure with high crystallinity on the metal-rich liquid interface by reducing surface energy and enhancing atomic diffusion, and then under the driving of solid-liquid-solid growth, the metal chalcogenide amorphous film can be formed into a crystal structure with high crystallinity. And finally, the wafer-level, pure-phase and thickness-controllable metal chalcogenide crystal film is obtained.

According to the invention, heavy arsenic doping 1t is reduced; 111gt, 111gt; the invention relates to a crystal pulling method based on crystal orientation monocrystalline silicon section defect density and a monocrystalline silicon rod, and belongs to the technical field of monocrystalline silicon pulling. In the equal-diameter process, the liquid opening distance is constant, the pulling speed of the crystal bar is gradually reduced according to the length of the crystal bar, and the ratio (CR / SR) of crystal rotation / pot rotation is adjusted, so that heat conduction is uniformly transmitted in the radial direction of the crystal bar by controlling the growth rate of crystals, the temperature gradient of a solid-liquid interface and precipitation of oxides, and the heat conduction efficiency is improved. And in the crystal growth process, point defects such as interstitial atoms and vacancies have more opportunities to diffuse outwards, so that the generation of the point defects and impurity decorations is inhibited, the defect density of the section of the single crystal silicon rod is reduced, and the quality of the heavily arsenic-doped crystal rod is improved.

The invention discloses a low-temperature liquid storage tank pressure prediction method based on a non-thermal equilibrium state model, and aims to improve the calculation speed of a pressure evolution law so as to reduce the time required for predicting the pressure of a storage tank. The method comprises the steps that firstly, a pressure sensor, a temperature sensor and a liquid level meter are used for collecting the temperature of a current gas phase and liquid phase area of the low-temperature liquid storage tank, the pressure in the storage tank, the vacuum degree of a heat insulation layer and the real-time liquid level; secondly, transmitting signal data obtained by monitoring of the sensor to a processor, and checking the density, phase change latent heat and thermodynamic energy of gas and liquid phases in the storage tank through REFPROP software; then establishing a three-dimensional model and a heat and mass transfer relationship of the storage tank, and performing heat transfer analysis on gas-phase and liquid-phase media in the storage tank; secondly, performing energy analysis on a gas phase region, a liquid phase region and a gas-liquid interface in the storage tank according to the established three-dimensional model and a heat transfer analysis result, and selecting a proper time step to perform iterative calculation so as to ensure the calculation precision of each step; storing the calculation result of the previous step, and searching and taking thermodynamic parameters of the next time step through REFPROP software according to the parameters obtained through calculation; finally, the safe storage time of the storage tank under the current liquid filling volume and the heat insulation performance is calculated, and safe work of the storage tank is guaranteed.