116 results about "Moisture diffusion" patented technology

The invention provides a seasonal frozen earth region roadbed stability evaluation method, a seasonal frozen earth region roadbed stability evaluation device and a medium, and relates to the technical field of seasonal frozen earth region roadbed stability evaluation. Meanwhile, performing a freeze-thaw cycle experiment in a laboratory, and fitting to obtain a heat conduction coefficient and a moisture diffusion coefficient of the soil sample; inputting field data and experimental parameters into the finite element model, simulating hydrothermal transfer and mechanical behaviors under different seepage and drainage grating arrangement conditions, and analyzing dynamic change rules of a temperature field, a water content field and frost heaving stress; then, a hydrothermal dynamic behavior and rib-soil interface behavior prediction model is trained based on an LSTM network architecture, and hydrothermal changes and mechanical properties of the roadbed under different conditions are predicted; and finally, based on an output result of the prediction model, calculating a roadbed stability index by combining a comprehensive stability evaluation model.

The invention provides full-automatic high-quality paper pulp molding microwave drying forming equipment which comprises a microwave drying forming part, a suction filtration forming part and a cooling circulation system. The full-automatic high-quality paper pulp molding microwave drying forming equipment has the following beneficial effects that a wave heat source can be turned on and turned off according to actual requirements; in a traditional electric heating mode, a heat source needs to be started all the time to ensure that a mold is in a high-temperature state, and the heat conduction direction is opposite to the water vapor transmission direction, so that the outer part of a paper-plastic product is dried firstly, and internal moisture diffuses to the surface and then is dried under the humidity and temperature gradient, the drying speed is slower, and places with high moisture content are dried slowly. The heat conduction direction of microwave drying is the same as the transfer direction of water vapor, the temperature is increased inside and outside at the same time, and based on the drying characteristic that microwaves can polarize water molecules, the higher the water content is, the higher the temperature is, the higher the drying rate is, the material can be heated more uniformly, and the production period can be greatly shortened.

The invention provides a method for analyzing tobacco leaf moisture migration characteristics based on an LF-NMR technology, and belongs to the technical field of electric digital data processing. The method comprises the following steps: carrying out standardized sample pretreatment, measuring a moisture state through low-field nuclear magnetic resonance, establishing a moisture migration dynamic model, calculating a moisture diffusion coefficient matrix, constructing a moisture loss prediction model, adjusting migration parameters by applying a moisture diffusion optimization function, and analyzing whole-leaf moisture distribution by applying a neural network model of a multi-scale attention mechanism. And carrying out different temperature gradient experiments, analyzing the moisture migration difference between the main vein and mesophyll tissues, verifying the accuracy of the prediction model and the like, thereby realizing accurate quantitative analysis on the migration dynamic characteristics of the tobacco leaf moisture in different microstructures. According to the method, the low-field nuclear magnetic resonance technology, the moisture diffusion theory and deep learning are combined, the migration characteristic of moisture in the tobacco leaf microstructure is accurately recognized, and a scientific basis is provided for tobacco leaf curing process optimization.

The invention relates to the technical field of intelligent irrigation, in particular to an intelligent watering control method and system for agricultural production, and the method comprises the steps: data collection, global data reconstruction, soil moisture content prediction, watering strategy optimization, sensor layout optimization, control execution and model updating. In the prior art, a pure mathematical method is generally adopted to calculate global humidity from sparse point data, and multi-dimensional environment information cannot be effectively fused, so that the reconstruction precision is limited and the physical credibility is insufficient; a physical information enhanced confrontation generation network is adopted to carry out global perception, sparse measurement values, geographic coordinates and real-time environment data are fused into conditional tensors to be input into a generator, and training is guided by forcing sensor data consistency in a loss function and introducing moisture diffusion physical constraints; the method can generate a high-resolution and physically reasonable global soil humidity distribution diagram, and significantly improves the reconstruction precision and reliability from sparse points to planar information in a complex farmland environment.

The utility model discloses a pre-treatment promoting device for fruits with waxy epidermis, which adopts a cold plasma jet device to release jet cold plasma to an objective table, so as to change charge distribution on the waxy epidermis surface by using a variable electric field and generated free radicals and free electrons in the discharge process of the jet cold plasma. Meanwhile, due to the etching effect of jet flow cold plasma treatment, wax on the epidermis of the fruits with wax on the epidermis is broken, a new moisture diffusion channel is formed, and therefore the diffusion rate and quality of the moisture of the fruits in the drying process are improved. The device is suitable for pre-treatment of fruits with waxy epidermis, has the advantages of rapid and efficient dehydration and drying and continuous drying promotion treatment of the fruits, is simple and convenient to operate, mild in condition, green and safe, remarkable in drying promotion effect, high in treatment speed and more environment-friendly, gets rid of dependence of dipping and drying promotion by using a chemical drying promoter at present, and has a wide application prospect. The drying quality and the eating safety of the fruits with waxy epidermis are improved.

The invention relates to the technical field of strawberry tea freeze-dried powder processing, and discloses a strawberry tea freeze-dried powder continuous processing production line and method.The strawberry tea freeze-dried powder continuous processing production line comprises a vacuum drying tank, a filter cylinder, an elastic assembly and a driving assembly; the filter cartridge is arranged in the vacuum drying tank, and the elastic assembly is mounted on the filter cartridge; a filter disc is installed in the filter cylinder, the filter disc divides the interior of the filter cylinder into a first cavity and a second cavity, a plurality of first steel balls are arranged in the first cavity, a plurality of second steel balls are arranged in the second cavity, and the diameter of the first steel balls is larger than that of the second steel balls. According to the invention, the filter cylinder in the vacuum drying tank rotates and shakes, steel balls with different diameters are used for performing double crushing and grinding on the raspberry tea, and meanwhile, the steel balls transfer heat during impact and accelerate diffusion and evaporation of moisture in the raspberry tea, so that integration of drying, crushing, screening and grinding is realized, the drying time is effectively shortened, the drying efficiency is improved, and the equipment cost is reduced.

The invention discloses a humidity sensor monitoring method and system for moisture resistance evaluation, and belongs to the technical field of environment monitoring. The method comprises the following steps: acquiring monitoring performance data of humidity sensors, determining initial layout positions of the humidity sensors in a target area, performing redundancy analysis, and constructing a humidity monitoring system after optimizing the layout positions; acquiring humidity change data under different environment characteristics and humidity conditions through a monitoring system, and constructing a humidity difference atlas; analyzing moisture diffusion characteristics based on the humidity difference atlas, and establishing a humidity change prediction model; monitoring humidity information and environmental condition data in real time, and importing the humidity information and the environmental condition data into the prediction model to predict humidity change so as to obtain a prediction result; and determining a monitoring weight and a monitoring strategy of the humidity sensor according to a prediction result. The sensor layout and monitoring method is optimized, the moisture resistance of the target area can be efficiently evaluated, and the humidity monitoring precision and efficiency are improved.

The invention discloses an anti-condensation method for a closed cavity with a ventilation valve, and the method comprises the following steps: setting a plurality of measurement points in the closed cavity to obtain a moisture diffusion coefficient of each measurement point in the closed cavity, and fitting to obtain an influence function of temperature, humidity and a humidity adjusting material on the moisture diffusion coefficient; according to the moisture diffusion coefficient and each influence function, constructing a simulation model to simulate the distribution of moisture in the closed cavity; acquiring internal temperature and humidity and external environment information of the closed cavity; obtaining condensation conditions according to the internal temperature, humidity and external environment information of the closed cavity in combination with a moisture diffusion coefficient; and according to the moisture distribution and condensation conditions in combination with the simulation model, obtaining the use amount and position distribution of the anti-condensation humidity adjusting material. Condensation prevention of the closed cavity with the ventilation valve is achieved.

The invention discloses a method, a system, a medium and equipment for simulating moisture transverse diffusion of a damaged cable, and the method comprises the steps: obtaining the water absorption data of a cable material, and determining the humidity environment of an area where the cable is placed; according to the water absorption data of different materials, utilizing a Fick first law moisture diffusion model to calculate the moisture diffusion coefficient of each material in the humidity environment; constructing a moisture diffusion simulation model of the cable, and setting the moisture concentration of the damaged interface of the outer sheath of the cable as a boundary condition; simulating a diffusion process that water transversely diffuses into the cable from the damaged part of the outer sheath along with time when the cable is in a humidity environment; a section and a boundary probe are arranged according to a simulation result, and water absorption weight increment is obtained through simulation. Through the technical scheme of the invention, real-time monitoring and prediction of dynamic change of moisture in the cable can be realized, and technical support is provided for maintenance and fault prevention of the cable, so that potential damage to the cable is avoided.

The invention provides a physical simulation test system and a test method for water immersion fracture instability of coal and rock mass, and belongs to the technical field of underground mining of mines. The system comprises a physical model, a biaxial loading device, a hydraulic jack, a rigid pressing plate, a combined plate, a water pressure control system, a pressure sensor, a displacement sensor, an acoustic emission sensor and a resistance test probe. Pressure sensors and resistance test probes are buried around a preset goaf and a roadway in the physical model, a water pipe is buried behind the goaf, the double-shaft loading device can load the physical model in the horizontal direction and the vertical direction, the rigid pressing plate is arranged behind the physical model, and the combined plate is arranged in front of the physical model. A roadway excavation opening is reserved in the position, at the preset position of the physical model, of the combined plate, and the water pressure control system is connected with a preset goaf of the physical model through a water pipe. The method can be used for researching the internal moisture diffusion rule, the water immersion weakening mechanism, the coal pillar width design and the like of the goaf coal rock mass.

The invention discloses a chinlon monofilament yarn strength detection device, and belongs to the field of chinlon detection, the chinlon monofilament yarn strength detection device comprises a support assembly, a strength detection mechanism is mounted in the support assembly, a clamping regulation and control mechanism corresponding to the strength detection mechanism is mounted in the support assembly, and an adjusting mechanism is mounted on the surface of the support assembly. The clamping regulation and control mechanism comprises a movable block and a fixed block which are installed in the supporting assembly. Through cooperative use of the devices, based on mutual cooperation of a driving motor, a driving gear and other components, a corresponding clamping plate and a moving block drive a polyester monofilament to rotate, so that the state of the polyester monofilament in the detection box is changed into a spiral shape, the surface area of the polyester monofilament is increased, and therefore the temperature and humidity of the polyester monofilament are balanced when the temperature and humidity of the polyester monofilament are balanced. Meanwhile, through the arrangement of an air guide fan, air circulation in the detection box is increased, and based on the laser range finder, the length of the polyamide monofilament sample is controlled, and the moisture diffusion path is shortened.

The invention discloses a soil dry crack simulation method based on two-dimensional particle discrete elements, and relates to the field of soil physics. The method comprises the following steps: dispersing a to-be-solved region by using particles, and endowing control parameters; contact retrieval is carried out between the particles and between the particles and the boundary, the action ranges of mechanics and moisture diffusion are determined, and a force chain and a virtual moisture diffusion channel are established between the action ranges; moisture diffusion calculation is carried out between the particles and between particle boundaries, and the moisture content of the particles is updated; and carrying out mechanical calculation between particles and between particle boundaries, and updating crack information. According to the invention, the simulation of the water loss and dry cracking problem of the soil under the two-dimensional condition can be realized.

The invention relates to the technical field of high-water-content organic solid waste drying, in particular to a high-water-content organic solid waste drying method. According to the technical scheme, by means of the target organic matter, a carbon source can be provided for the target strain, and moisture diffusion channels between the solid waste blocks formed by the high-water-content organic solid waste can be supported, so that unbound water surrounded by the multiple solid waste blocks is diffused outwards from the moisture diffusion channels; organic matters in the high-water-content organic solid waste can be degraded and the porosity and the specific surface area of the high-water-content organic solid waste can be increased by virtue of the target strain; the temperature in the sunlight shed and the temperature of the target mixture in the drying process do not exceed 50 DEG C, so that good survival conditions of the target strains can be guaranteed, and the risk of dust explosion caused by dust concentration increase in the later drying period due to introduction of the target organic matter can be reduced. And the target mixture receives solar radiation, is continuously turned and is driven by the fan, so that the high-water-content organic solid waste is dried.

The present invention provides a physical simulation test system and test method for water-immersed cracking and instability of coal-rock mass, belonging to the field of underground mining technology. The system includes a physical model, a biaxial loading device, a hydraulic jack, a rigid pressure plate, a combination plate, a water pressure control system, a pressure sensor, a displacement sensor, an acoustic emission sensor and a resistance test probe. The physical model is provided with pressure sensors and resistance test probes buried around the preset goaf and tunnel, and a water pipe is buried behind the goaf. The biaxial loading device can load the physical model in the horizontal and vertical directions. The rigid pressure plate is placed behind the physical model, and the combination plate is placed in front of the physical model and connected and fixed with the rigid pressure plate by high-strength bolts. The combination plate is provided with a tunnel excavation opening at the preset position of the physical model, and the water pressure control system is connected to the preset goaf of the physical model through a water pipe. It can be used to study the internal water diffusion law of coal-rock mass in the goaf, the water-weakening mechanism, and the design of coal pillar width.

The application relates to the technical field of coal mine safety, and provides a coal spontaneous combustion behavior evolution method and system under multi-physical field coupling. The temperature field of coal body spontaneous combustion changes the volume by affecting the deformation amount, the porosity of the coal body is calculated through the volume, and then the thermal deformation is driven; the thermal deformation influences the water diffusion through the porosity, the residual moisture saturation of the coal body and the liquid phase saturation, and then the water migration is driven in combination with the evaporation rate and the liquid phase saturation; the water migration drives the heat transfer in combination with the evaporation rate, the effective thermal conductivity and the coal oxidation reaction rate, a cycle of "heat transfer-thermal deformation-water-heat transfer" is formed, the "heat-force-water-heat" coupling closed loop during the coal body spontaneous combustion is realized, the two-way coupling of the seepage field, the temperature field and the mechanical field is realized, and the problem that the prediction is inaccurate due to the neglect of thermodynamic deformation and dynamic changes of pores in a traditional model is effectively solved.

The present application relates to the technical field of high-moisture organic solid waste drying, and particularly relates to a drying method of high-moisture organic solid waste. The technical scheme can provide carbon source for target bacteria, support water diffusion channels between solid waste blocks formed by high-moisture organic solid waste, diffuse non-bound water surrounded by multiple solid waste blocks from the water diffusion channels, degrade organic matters in the high-moisture organic solid waste, increase porosity and specific surface area of the high-moisture organic solid waste, and keep the temperature of the sunlight shed and the temperature of the target mixture in the drying process below 50 DEG C, which can ensure good living conditions of the target bacteria and reduce the risk of dust explosion caused by the increase of dust concentration in the late drying period due to the introduction of target organic matter. The target mixture receives sunlight radiation, continuously turns over and is driven by a fan, so as to realize drying of the high-moisture organic solid waste.

The utility model relates to the technical field of packaging equipment, and particularly discloses a press of a paper mounting machine. Comprising a belt conveying line, a press machine support, an upper conveying belt, pressing rollers, swing arms and tensioning devices, the press machine support is fixedly arranged above the belt conveying line, the multiple pressing rollers are arranged between two longitudinal beams of the press machine support in a swinging mode, and the tensioning devices are arranged between the two ends of each pressing roller and a rack of the belt conveying line; the tensioning device is arranged between the pressing roller and the belt conveying line, extra downward pressure is provided for the pressing roller, the pressure on paperboards is larger, the attaching firmness degree of surface paper can be improved, the upper conveying belt is of a net-shaped structure, moisture in glue can be diffused into the environment, drying and curing of the glue are facilitated, the probability that the surface paper is not tightly attached is reduced, and the service life of the surface paper is prolonged. And the yield is improved.

The invention discloses a soil shrinkage cracking analysis method and device based on near-field dynamics. The analysis method comprises the following steps: establishing near-field dynamic models of a soil body, wherein the near-field dynamic models comprise a heat conduction model, a moisture diffusion model and a motion model; setting initial parameters and boundary conditions of the model; solving the heat conduction model and the moisture diffusion model through an explicit algorithm, solving the motion model through an implicit algorithm, and obtaining a displacement field variable value under the current time step; and based on the variable value, updating a scalar value function to obtain local damage and strain energy density, and obtaining a stress field variable value under the current time step through a near-field dynamics differential operator. According to the method, complex behaviors of the soil body under the heat-water-force coupling effect are considered, the explicit-implicit hybrid algorithm is adopted, and the dry shrinkage cracking process of the soil body can be accurately simulated.

Disclosed in the present invention is a fabric supporting weakened display of sweat print, comprising at least one type of yarns. A fabric body comprises a clothing surface visual interference layer, a moisture diffusion layer, and a skin-contact surface visual interference layer. The clothing surface visual interference layer is a discontinuous 3D structure, and is provided with first protrusions, the height of each first protrusion is H1, the width thereof is W1, and a spacing width between two adjacent first protrusions is W2, wherein 0.5 ≤ W2 / H1 ≤ 1.5 and 0.5 ≤ W1 / W2 ≤ 3.5. The moisture diffusion layer is a continuous structure, and the height of the moisture diffusion layer is H2. The skin-contact surface visual interference layer is a discontinuous 3D structure, and is provided with second protrusions, the height of each second protrusion is H3, the width thereof is W3, and a spacing width between two adjacent second protrusions is W4. According to the fabric of the present invention, the comfort after sweating can be improved, the adhesion to the skin is reduced, and a visual effect of weakened sweat print is generated.

The application relates to the technical field of coating life prediction. A magnesium alloy protective coating life prediction method, device, equipment and medium are provided. The method comprises the following steps: acquiring coating parameters and corrosion medium parameters; based on a pre-set coating moisture diffusion model, the diffusion time of moisture in the coating is calculated according to the coating parameters and the corrosion medium parameters; based on a pre-set coating adhesion decay model and a corrosion hydrogen evolution induced additional stress increase model, the coating failure time is determined according to the coating parameters and the corrosion medium parameters; and the coating predicted life is calculated according to the diffusion time of moisture in the coating and the coating failure time. Based on the in-depth understanding of the magnesium alloy corrosion process and the full understanding of the organization and performance evolution law of the coating failure process, the magnesium alloy protective coating life can be accurately and quickly predicted.

The application relates to the technical field of refractory material preparation, and particularly discloses an energy-saving segmented gradient low-temperature drying method for refractory materials and a control system thereof. The drying method comprises five sequentially connected continuous steps of system initialization, surface free water pre-removal, internal moisture diffusion strengthening, moisture content gradient buffer balance and deep dehydration standard reaching, the whole process takes the water vapor partial pressure difference as the core dehydration driving force, and a control mode of reverse linkage of cavity temperature and environmental absolute humidity is adopted. The control system matched with the drying method comprises a sensing layer, an execution layer and a PLC control layer, and is provided with a built-in double-closed-loop linkage control module, so that automatic closed-loop management and control of the whole drying process can be accurately realized. The application can be used for drying treatment of various industrial shaped and unshaped refractory material blanks, efficient dehydration can be realized in a low-temperature environment, the comprehensive energy consumption of drying is significantly reduced, defects such as blank crust and cracking are effectively avoided, and the product quality and batch stability are ensured.

The present invention discloses a method for optimizing the soaking time based on the hydration expansion stress. Considering the high content of shale clay minerals, after the rock undergoes a hydration reaction with the fracturing fluid, induced microfractures are generated due to disintegration, softening and expansion, improving the overall permeability of the reservoir, so as to maximize the soaking construction effect after fracturing. The method obtains the fracture pressure and pore pressure through a two-dimensional pore model and logging in-situ stress data, in combination with the rock tensile strength failure criterion; obtains the dynamic moisture content profile through a forced imbibition model and a moisture diffusion equation; obtains the hydration expansion stress through a three-dimensional stress-strain mathematical model of rock mechanics; combines the conditions for crack generation in the force field with the force field changes under different soaking days to obtain the optimal crack length and the corresponding shortest soaking time. The soaking time optimization method provided by the present invention can reduce the construction time and improve the construction effect.

The invention relates to the technical field of agricultural product drying, discloses agricultural product dynamic drying equipment based on intelligent temperature and humidity regulation and control, and aims to overcome the defects that in the prior art, agricultural products are not prone to being accurately and rapidly dried, and drying energy consumption is large. Through linkage of the air conditioning unit, the PTC heater and the multi-point temperature and humidity sensor, a three-stage dynamic drying mode is constructed, the drying requirements of different agricultural products can be accurately met, rapid temperature rise in the initial stage and efficient dehumidification in the middle stage are guaranteed, cracking of the agricultural products is avoided through humidification regulation and control in the cooling stage, meanwhile, air conditioning condensate water is recycled for humidification, and the energy consumption is reduced. The water resource utilization rate is obviously improved; the gear motor drives the disc to drive the goods shelf to rotate, and the reciprocating mechanism and the scraping assembly are matched for reciprocating movement and vibration, so that uniform turning and global moisture content real-time monitoring of agricultural products are achieved, hot airflow rotational flow and moisture diffusion are effectively promoted, and drying uniformity and efficiency are improved.

A method for predicting the moisture content of cut tobacco based on a rapid moisture absorption characteristic curve comprises the following steps: Step 1: studying the moisture adsorption / desorption characteristics of cut tobacco to obtain the equilibrium dry basis moisture content M of sample S1 under the required environmental conditions; e and effective water diffusion coefficient D eff Step 2: Initial dry basis moisture content M of the tobacco sample S2 to be tested during processing ds Equation derivation; Step 3: Prediction of the initial dry basis moisture content of the tobacco sample corresponding to the process during processing. The present invention uses the thermal moisture analyzer to obtain the equilibrium dry basis moisture content of the tobacco corresponding to the environmental conditions, obtains the moisture diffusion coefficient of the tobacco under the above environmental conditions according to Fick's second law, and obtains the initial dry basis moisture content of the tobacco sample to be tested through model derivation.

The application discloses a shield tail sealing grease cavity real-time detection system, and belongs to the technical field of shield construction monitoring, which comprises a multi-physical field monitoring module and an intelligent early warning analysis module, wherein the multi-physical field monitoring module comprises a pressure difference monitoring unit and a moisture monitoring unit, and the intelligent early warning analysis module comprises an edge data processing unit and a risk assessment unit; the pressure difference monitoring unit collects grease pressure data in the grease cavity and external environment water pressure data, establishes a pressure difference dynamic model and generates a pressure difference space-time distribution atlas, and marks a high-risk leakage area through abnormal identification and pressure calculation; the moisture monitoring unit generates a moisture intrusion path atlas in combination with a constructed moisture diffusion model and a three-dimensional coordinate system, and marks a potential leakage area; the edge data processing unit extracts dynamic characteristics, the risk assessment unit outputs a leakage risk grade through Bayesian network fusion analysis, and triggers a secondary early warning when triple abnormalities are detected, so that real-time and accurate monitoring and early warning of grease cavity leakage are realized.

The invention discloses automatic equipment and method for post-treatment after preparation of surgical drapes, and relates to the field of fabric drying treatment.The method comprises the following steps that S1, the surgical drapes to be dried are frozen; s2, medium and low temperature hot air circulation is adopted, surface water is removed, and inner layer ice crystals are melted; s3, separating from low-temperature hot air circulation for a period of time; and S4, far infrared radiation is adopted, and the absorption characteristic of silver ions to a specific wave band is utilized, so that drying post-treatment of the surgical drape is achieved. By means of multi-step collaborative drying combining freezing treatment, hot air circulation, standing and infrared radiation, the moisture diffusion efficiency is greatly improved, deep moisture residues are reduced, degradation of the antibacterial performance of nano-silver particles in the antibacterial layer due to high-temperature oxidation or agglomeration is effectively avoided, meanwhile, fiber deformation is restrained, and the antibacterial effect is improved. The dimensional stability and antibacterial durability of the sheet are ensured, so that the sheet has relatively good dual optimization of drying efficiency and material performance protection.

The invention relates to the field of food processing, and discloses an oil noodle making technology and processing equipment thereof, and the technology comprises the steps of raw material preparation, flour mixing and dough kneading, wire rod coiling and fermentation, skewer feeding, noodle pulling and hanging, drying, noodle cutting and classification, packaging, finished product storage and the like. By optimizing process parameters and a dynamic control method of each link, particularly regulating and controlling temperature and humidity in stages in a drying process, and combining dynamic balance of moisture diffusion and evaporation, uniform distribution of moisture of noodles and optimization of a gluten network are realized; the processing equipment comprises a dough kneading device, a fermentation container, a noodle pulling and hanging device, a drying device and a noodle cutting and packaging device. The method is suitable for production of oil noodles of various specifications, the process efficiency, the yield and the consistency of product quality are remarkably improved, meanwhile, energy consumption and labor dependence are reduced, and technical support is provided for large-scale and modern production of the oil noodle industry.

The invention discloses an expansive soil slope hydrothermal control active area identification method. The method comprises the following steps: acquiring a vertical deformation time sequence of each pixel of a target area and a rainfall time sequence of a corresponding time period; processing the two groups of time sequences, and extracting periodic response characteristics representing the moisture-driven deformation process; constructing a hydrothermal transfer model reflecting a swelling soil moisture diffusion mechanism and a depth integral deformation mechanism so as to establish a physical mapping relation between theoretical prediction response characteristics and normalized active area depth; and substituting the periodic response characteristics into a hydrothermal transfer model to carry out inversion matching solution, and calculating the total depth of the active area of each pixel in combination with a pre-calibrated moisture diffusion coefficient. According to the method, the theoretical upper limit of depth inversion of a traditional single-layer time domain model is effectively broken through, and accurate physical quantitative recognition of the depth of the active area under the complex hydrothermal boundary is achieved.

The present application provides a method and system for evaluating the moisture permeability of concrete. The method first obtains moisture gradient change data within the concrete and performs moving average processing on the data to generate smoothed moisture diffusion data. Secondly, based on the diffusion data, the frequency offset data caused by humidity influence is measured in the microwave frequency band, and diffusion features are extracted from the offset data using phase locking technology. The diffusion features are then subjected to spatiotemporal correlation processing to identify hotspot patterns. Finally, pattern clustering processing is performed on the hotspot patterns, grouping them into multiple levels and outputting the concrete permeability rating. The technical solution provided by the present application not only ensures real-time and lossless capture of the microscopic dynamics of moisture migration, but also achieves zero-delay analysis of the true permeability dynamics, fundamentally resolving problems such as manual experience misjudgment and offline simulation inaccuracy.

The invention discloses a polyurethane composite material with high moisture resistance and hydrolysis resistance and a preparation method thereof, a polyol mixing system and an isocyanate mixing system are adopted, a hydrolysis-resistant main chain is provided, polar groups can be shielded, and interface bonding can be enhanced; an IPDI-MDI compound system constructs a rigid-flexible alternating network, so that the effect of inhibiting a moisture diffusion path can be achieved, and the purposes of moisture resistance and hydrolysis resistance are further achieved; the hydrophobic modified SiO2, the fluorocarbon surfactant and the molecular sieve in the filler form physical adsorption-chemical barrier synergistic protection; and through process optimization, the composite material disclosed by the invention forms a multi-aspect moisture-resistant hydrolysis-resistant high-strength composite material, shows excellent moisture resistance and stability, and effectively prevents the performance of the composite material from being reduced.