49 results about "Moisture diffusion" patented technology

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 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 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 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.

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 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 application discloses a kind of rice water absorption performance classification and moisture distribution optimization method and control system, by analyzing the water absorption performance of rice, moisture diffusion distribution, realizes the accurate control of rice cooking process.First, the water absorption performance of rice is classified using support vector machine algorithm, and the moisture distribution equation is constructed to calculate the internal moisture distribution of rice.Then, according to the moisture distribution, the heat transfer process is optimized.Finally, the heating power is dynamically adjusted, the internal heat distribution of rice is optimized, and the uniformity of moisture absorption is realized.The application accurately controls the whole process of rice cooking by multidimensional data analysis and intelligent algorithm application, effectively improves the consistency and taste of rice quality, and provides a new technical scheme for intelligent cooking equipment.

This invention relates to the field of wood-based panel drying equipment, and more particularly to a drying device for the production of fir wood panels. The drying device for fir wood panel production of this invention separates stacked fir wood panels through main and secondary support plates connected by central rings at each layer, increasing the gaps between the layers and improving the flow of hot air between them. Simultaneously, an electric exhaust fan guides the hot air upwards through the central column and the main support plates at each layer into the interior of the stacked fir wood panels, ensuring efficient drying of the internal areas as well. The hot air also blows outwards from the interior of the fir wood panels, increasing the rate of moisture diffusion. This drying device for fir wood panel production of this invention significantly improves upon the technical shortcomings of traditional stacked drying methods for fir wood panels in drying chambers, which suffer from uneven heat transfer and poor moisture diffusion.

The present application relates to the technical field of chemical material storage stability simulation, in particular to a carbonic acid ethylene storage stability simulation method based on digital twinning, aiming to solve the problem that traditional evaluation cannot deeply couple dynamic factors such as moisture penetration, temperature and humidity change and product accumulation, cannot accurately restore the moisture gradient balance and product accumulation law in the container, and is difficult to predict the evolution of key quality indicators and failure boundaries, by constructing a digital twinning body basic model containing molecular structure and hydrolysis kinetics parameters, embedding dynamic moisture adsorption and reaction kinetics modules, calculating parameters such as moisture diffusion and penetration rate, integrating temperature and humidity sensor data, forming feedback by coupling heat and mass transfer and reaction kinetics equations, outputting stability attenuation risk index, predicting acid value, moisture content, color evolution trend and identifying failure threshold, and iteratively correcting model parameters combined with actual detection data to improve simulation accuracy.

The invention discloses a simulation experiment method and system for different damp positions of an oil-immersed bushing capacitor core. According to the method, firstly, measuring points are arranged along the surface of a damped capacitor core, the moisture concentration is measured, a discrete data set of the moisture content is obtained, then a radial basis function interpolation method is adopted, the measured moisture data is further expanded, dense data points on a three-dimensional regular grid in the bushing capacitor core are obtained, and the moisture content of the bushing capacitor core is calculated. Flux and divergence thereof are calculated according to a moisture diffusion rule, and space coordinates of the damp position are determined through threshold screening and weighted calculation. Accurate positioning of the damp invasion position of the oil-immersed bushing capacitor core is realized, and the reliability of insulation state evaluation and fault early warning is improved.

The invention relates to the technical field of carton defect analysis, in particular to a corrugated carton moisture-proof testing method and system.The corrugated carton moisture-proof testing method comprises the steps that solutions containing different fluorescent substances are dropwise added to two moisture diffusion points on a paperboard sample synchronously; marking a plurality of paper junction points and determining a fiber water absorption boundary line according to the comparison condition of the fluorescence peaks captured in each sub-region and the neighborhood; judging whether to stop dropwise adding the solution to a wet diffusion point or not by calculating a water absorption performance deviation coefficient of paper surface fibers; and finally, judging whether the water-absorbing moisture-proof performance of the paper surface is qualified or not according to the water-absorbing test value of the paperboard sample. The corrugated carton moisture-proof test system comprises a fluorescence soaking module, an image acquisition module, a fluorescence excitation module, a control module and a test analysis module, and the spatial form difference of water absorption and diffusion of paper surface fibers of a carton is analyzed; the moisture-proof performance of the surface of the carton can be quickly identified and analyzed in the continuous production of the corrugated carton.

This invention discloses a method for dynamic monitoring and control of the spatial environment in underground utility tunnels, relating to the field of urban infrastructure operation and maintenance technology. After sorting the tunnel segments, instead of applying the same control method directly to all abnormal segments, it continues to read the environmental monitoring items that contribute the most to the deviation in each segment. Combining the function type, function area, and cross-segment boundaries of existing actuators, it calculates the control mapping relationship between the tunnel segment and candidate actuators, and then selects the actuator that best matches the current dominant deviation state for each segment. Fans, drainage pumps, access control linkage programs, and ventilation zone switching programs are no longer simply called in fixed patterns, but are instead linked separately based on the dominant environmental problems of different tunnel segments. For common issues in underground utility tunnels such as gas migration, moisture diffusion, and water accumulation, this method enables the actuator to match the abnormal attributes and main chain relationships of the current tunnel segment.

The utility model relates to the related technical field of epoxy resin processing, in particular to a dehydration device for high-viscosity bio-based epoxy resin, which comprises a dehydration tank body, an air exhaust mechanism is arranged on the outer side of the dehydration tank body, and a waste heat recovery mechanism is arranged on the outer side of the dehydration tank body. Through the arrangement of the air exhaust mechanism, the ultrasonic generator is matched with the oscillation head to generate ultrasonic waves, water diffusion is accelerated, the driving pump extracts water vapor in the tank body to form a negative pressure environment, the boiling point of water is lowered through negative pressure, more water is promoted to be evaporated rapidly, and the dehydration effect is further enhanced; through the arrangement of a straight condenser pipe, pumped-out water vapor can be effectively cooled and condensed into liquid water, the water vapor is separated from high-viscosity bio-based epoxy resin, the purity of the dehydrated epoxy resin is improved, a heat exchanger of the waste heat recovery mechanism collects waste heat emitted by the dehydration tank body, materials in the feeding pipeline are preheated after the waste heat is absorbed, and the dehydration efficiency is improved. And the energy utilization efficiency is improved.

This invention belongs to the field of humidity control technology and discloses a method for obtaining the moisture diffusion coefficient. Based on a sealed cavity with a vent valve, the sealed cavity has multiple measurement points. The method includes the following steps: obtaining the diffusion distance from each measurement point to the vent valve; obtaining the temperature and humidity of the external environment of the sealed cavity within a preset time period; obtaining the temperature and humidity of each measurement point inside the sealed cavity within the preset time period; and calculating the moisture diffusion coefficient using the half-life method based on the diffusion distance, the temperature and humidity of the external environment of the sealed cavity, and the temperature and humidity of each measurement point. This method can obtain the moisture diffusion coefficient under various conditions, thus providing reference data for condensation simulation calculations in equipment cavities.

The application provides a method for analyzing tobacco moisture migration characteristics based on LF-NMR technology, and belongs to the technical field of electric digital data processing.The method comprises the following steps: standardizing sample pretreatment, determining moisture state by 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 using a moisture diffusion optimization function, analyzing whole-leaf moisture distribution by using a neural network model of a multi-scale attention mechanism, performing different temperature gradient experiments, analyzing moisture migration difference between main veins and leaf tissue, and verifying prediction model accuracy, so that precise quantitative analysis of tobacco moisture migration dynamic characteristics in different microstructures is realized.The method combines low-field nuclear magnetic resonance technology with moisture diffusion theory and deep learning, accurately identifies moisture migration characteristics in tobacco microstructure, and provides a scientific basis for tobacco curing process optimization.

This invention relates to the field of fabric technology, specifically to a highly flexible suit coat fabric and its textile process. The fabric comprises a 2 / 2 twill cotton greige fabric and a flexible finishing layer fixed to the surface of the cotton fibers. The flexible finishing layer is formed by sequentially padding and pre-drying the greige fabric, which has undergone limited pretreatment with cellulase, with a first surface finishing solution of aldehyde-modified amylopectin / D-glucosamine hydrochloride, followed by coupling with a 3-aminopropyltriethoxysilane surface coupling solution, and a final finishing with D-glucosamine hydrochloride. The weight-average molecular weight of the aldehyde-modified amylopectin is 2.50 × 10⁻⁶. 5 -4.50×10 5 The degree of aldehyde substitution is 3.0%–7.0%. This invention enables the fabric to possess softness, washability and softness retention, tensile strength retention, breathability and moisture diffusion properties without the addition of formaldehyde resin finishing agent, making it suitable for clothing fabrics such as suits and overcoats.

An electronics enclosure is described comprising: a closed housing formed from a plurality of walls and wherein the plurality of walls consists of a plurality of continuous walls and one discontinuous wall having an opening or a plurality of openings; and a single vent arrangement. The single vent arrangement comprises a protective membrane positioned over the opening or plurality of openings, wherein the protective membrane is air-permeable and liquid-impermeable; a cover positioned over the opening or plurality of openings, wherein the cover is movable relative to the opening or plurality of openings between a first diffusion position and a second diffusion position to allow for different rates of moisture diffusion between the inside of the closed housing and an external environment via the opening or plurality of openings in the first diffusion position and the second diffusion position, wherein the cover allows for diffusion in both the first diffusion position and the second diffusion position; and an actuator arrangement configured to move the cover between the first diffusion position and the second diffusion position in response to a threshold temperature or temperature difference being crossed.

This invention provides a vacuum drying device for water-soluble inorganic salt carriers, relating to the field of water-soluble inorganic salt carrier drying technology. It includes a drying chamber and a drying drum. A vacuum pump is located at the back of the drying chamber, and a connecting pipe is fixedly installed on the top of the vacuum pump, with the output end of the connecting pipe connected to the interior of the drying chamber. A mounting frame is fixedly installed on the top of the drying drum. In this invention, the air inside the drying chamber is extracted by the vacuum pump and connecting pipe. Then, a controller activates two heating tube assemblies, which, with the assistance of temperature sensors, heat the interior to the required temperature. Next, the controller activates a drive motor, which drives a drive rod and multiple stirring blades to stir the material, ensuring uniform heating and moisture diffusion within the drying drum, thus ensuring thorough drying and improving the vacuum drying effect on water-soluble inorganic salt carriers.

The utility model provides a textile with water diffusion directivity. The textile is provided with a first texture and at least one second texture. The first structure has water diffusion directivity. The second structure is connected to the first structure and has moisture diffusion directionality, and the moisture diffusion directionality of the first structure is different from that of the second structure. Each second weave is provided with a first piece of a second weave warp knitting structure and a second piece of a second weave warp knitting structure, so that the second weave has water diffusion directivity. The first weave and the second weave which are different in moisture diffusion directionality are woven on the same textile, and the moisture diffusion directionality of the first weave and the moisture diffusion directionality of the second weave are different, so that moisture can be guided to an expected area of a user.

The application provides a one-way moisture-conducting bionic fabric and a preparation method thereof, and the one-way moisture-conducting bionic fabric comprises a fabric base body, the fabric base body comprises a skin layer, a directional conducting layer and a moisture diffusion layer from inside to outside in sequence; the skin layer is composed of hydrophobic fiber bundles with a first surface energy; the directional conducting layer comprises a plurality of asymmetric bionic micro-channels arranged in an array, the micro-channels penetrate through the skin layer and the directional conducting layer; the longitudinal section of the micro-channels is in a conical structure, the large end is towards the skin layer, and the small end is towards the moisture diffusion layer; the moisture diffusion layer is composed of hydrophilic fiber bundles with a second surface energy, and the second surface energy is greater than the first surface energy. The application introduces the bionic micro-channels with geometric asymmetric characteristics into the fabric structure, and combines the surface energy gradient design between the skin layer and the moisture diffusion layer, so that a liquid water self-driven transmission mechanism based on Laplace pressure difference is constructed at a micro level.

The application belongs to the technical field of seed cultivation, and particularly relates to a seed cultivation automatic irrigation device, and the following scheme is provided, which specifically comprises a breeding box, both ends of the breeding box are provided with pull-out rails, breeding racks are pullably installed between the pull-out rails, the top of each breeding rack is provided with a plurality of breeding cups in a mesh structure, both ends of the breeding box are further provided with horizontal electric guide rails, a longitudinal electric guide rail is installed between the two horizontal electric guide rails through an electric sliding block, and the top of the longitudinal electric guide rail is provided with a moving rack. In the application, the central part of the breeding cup is continuously ventilated through a ventilation mechanism, the air is used to accelerate the speed and uniformity of water diffusion, the humidity environment in the breeding cup and the air permeability of the soil are maintained, and when the ventilation mechanism and the irrigation mechanism are reset upwards, the soil around the breeding cup is left with continuous perforations, the soil temperature and humidity environment of the breeding cup is accurately controlled, and the yield of good seeds is improved.

The invention discloses a cleaning method for cleaning fruits and vegetables and discloses a cleaning device.The cleaning method for cleaning the fruits and vegetables comprises the following steps that 1, a fruit and vegetable cleaning bin is heated so that the temperature of cleaning liquid in the fruit and vegetable cleaning bin can rise to the first temperature, then the fruits and vegetables are soaked in the fruit and vegetable cleaning bin, and the temperature of the cleaning liquid can rise to the second temperature; the method comprises the following steps of 1, cleaning liquid in a fruit and vegetable cleaning bin, 2, atomizing the cleaning liquid in the fruit and vegetable cleaning bin by adopting an atomization cooler to reduce the temperature of the cleaning liquid to a second temperature, 3, increasing the humidity in the fruit and vegetable cleaning bin by adopting a humidity regulator, and 4, flushing fruits and vegetables by utilizing bubble flow generated by a bubble generation unit. The difference between the fruit and vegetable skin and the pesticide film in thermal expansion coefficient and moisture diffusion coefficient is utilized to induce formation of microcracks and realize physical stripping of the film layer, and residues are removed through micro-nano bubble scouring. The method does not need a chemical cleaning agent, and has the advantages of high efficiency, small damage to fruits and vegetables, environmental friendliness and the like.

The application provides a prestressed wood structure tension loss evaluation method and device, including the following steps: obtaining key parameters of the prestressed wood structure, and collecting temperature and relative humidity of a service environment; calculating the equilibrium moisture content of a wood surface based on the temperature and relative humidity, using a one-dimensional moisture diffusion model to combine the equilibrium moisture content as a time-varying boundary condition, and solving to obtain the internal moisture content distribution of the wood component; updating the elastic compliance of the wood according to the moisture content distribution, and combining the change rate of the prestress to calculate the elastic strain of the wood component. The application decomposes the total strain into four components with clear physical meaning, i.e. elasticity, pure creep, mechanical hygroscopic creep and hysteresis environmental strain, and sets differentiated parameters for the along-grain and across-grain components, and for the first time realizes quantitative analysis of the contribution of each factor in the evaluation, so that the main control mechanism of the prestress loss can be revealed, and direct theoretical basis and decision support for structure optimization design and preventive maintenance are provided.

The utility model provides a waterproof and dustproof structure of electronic communication equipment, which comprises an electronic communication equipment outer shell, a dustproof cover arranged on the front side of the electronic communication equipment outer shell, a dustproof rubber strip arranged on the outer edge of the dustproof cover, and a waterproof sealing film arranged on the rear side of the dustproof cover. According to the utility model, the dustproof cover at the front side is matched with the dustproof rubber strip at the outer edge, so that the dustproof cover is tightly attached to the outer shell, and the invasion of front dust is effectively prevented; the dustproof cover at the upper part and the dustproof silica gel sealing gasket at the joint prevent dust falling from the upper part from entering; the waterproof sealing film on the rear side of the dustproof cover can prevent water drops or splashed water from permeating; the waterproof isolation plates at the inner bottom and the lower portion can limit diffusion of moisture entering the equipment, and key electronic elements are protected. The multi-layer waterproof and dustproof structure can significantly reduce the accumulation of dust in the equipment, and ensures the stable operation of electronic components in a clean environment.

The invention discloses a method for predicting the moisture diffusion of a closed cavity under the influence of a humidity control material, which is based on the closed cavity with a ventilation valve, and comprises the following steps: acquiring the diffusion distance from each measurement point to the ventilation valve; acquiring the temperature and humidity of the external environment of the closed cavity in a preset time period; acquiring the temperature and humidity of each measurement point in the closed cavity in a preset time period; according to the diffusion distance, the temperature and the humidity of the external environment of the closed cavity and the temperature and the humidity of each measurement point, a moisture diffusion coefficient is calculated through a half-decay time method, and an influence function of the temperature and the humidity on the moisture diffusion coefficient is obtained through fitting; setting a humidity adjusting material at each measuring point, constructing a dynamic moisture absorption / release model of the humidity adjusting material in the closed cavity, and obtaining the moisture adjusting capability of the humidity adjusting material in the closed cavity; and according to the moisture diffusion coefficient, each influence function and the moisture adjusting capability of the moisture adjusting material, constructing a simulation model to simulate the distribution of moisture in the closed cavity so as to predict the moisture diffusion of the closed cavity.

This invention discloses a highly absorbent, low-pilling recycled polyester fiber and the blended yarn prepared therefrom, belonging to the technical field of polyester fiber materials. It addresses the technical problem that the absorbency, mechanical strength, and anti-pilling properties of recycled polyester fibers and their blended yarns in the prior art need further improvement. The recycled polyester fiber comprises a recycled fiber matrix and a functionalized layer on the surface of the matrix. This invention involves introducing sodium isophthalic acid-5-sulfonate, adipic acid, and esterified polyether into the polyester backbone, which then interacts with epoxy activated particles. A hydrophilic interface layer rich in polar groups is formed on the fiber surface through dopamine coating and glycidyl ring-opening reaction. The recycled polyester fiber is then blended with modal fiber, effectively improving not only the absorbency, moisture diffusion, and evaporation properties of the blended yarn, but also its tensile properties and anti-pilling properties.

The application discloses a relative humidity self-adaptive control method and system for hot air drying of fruits and vegetables; the method realizes real-time monitoring of hot air temperature, material surface temperature and material weight loss by arranging multi-modal sensors in a drying cavity; a partial differential equation of moisture diffusion in the thickness direction of the material is taken as a prediction model, and an online weighing signal is taken as an observation quantity, so that the water content distribution of each layer inside the material and the surface moisture gradient are estimated in real time through an extended Kalman filter; in the falling rate drying period, dimensionless moisture ratio and surface moisture gradient are taken as double variables to dynamically generate a relative humidity reference trajectory, and three actuators, i.e., heating power, circulating fan speed and exhaust air valve, are coordinately adjusted to realize precise tracking control of the relative humidity in the cavity; the application can significantly reduce the surface crust phenomenon in the hot air drying process, improve the product quality uniformity of drying, and is suitable for industrialized drying production of apple, carrot, potato and other sliced fruits and vegetables.

This utility model discloses a knitted fabric, relating to the textile field. The key technical points are: it includes a base layer, which is warp-knitted from a first yarn and a second yarn. The first yarn includes a first portion and a second portion alternately arranged in the warp direction. The first portion and the second portion on the same first yarn are respectively connected to two adjacent second yarns. Mesh is provided between adjacent first portions and between adjacent second portions. In this utility model, mesh is formed between adjacent first yarns, ensuring the breathability of the knitted fabric. It increases the moisture dissipation area by diffusing moisture, ensuring that the knitted fabric dries quickly after being partially wet, preventing the knitted fabric from sticking to the skin, and thus ensuring gas exchange on both sides of the knitted fabric. The second yarn is made of island yarn with a porous structure, twisted to ensure the diffusion speed of moisture on the knitted fabric.

The application provides a rock moisture diffusion coefficient determination and water absorption process simulation method and related equipment, which is used for characterizing the water absorption state of each particle at a mesoscopic level through a mesoscopic saturation coefficient on the basis of a particle discrete element technology, realizing numerical fine modeling, and thus can accurately and efficiently restore the rock water absorption process, thereby having significantly improved practical value.

The invention discloses aerogel with a vertical porosity gradient structure and a preparation method and application thereof.The method comprises the steps that firstly, a cellulose raw material is pulpified and purified, a uniform substrate is provided for structure regulation, and moisture response performance is stabilized; secondly, a TEMPO / NaBr / NaClO system is adopted for catalytic oxidation of the cellulose surface, hydrophilic groups such as carboxyl are introduced, the hygroscopicity and ionic conductivity of the fibers are improved, a high-specific-surface-area fiber network is formed through filter-pressing homogenization treatment, local resistance difference is reduced, and output voltage and current are stabilized; then, directional freezing induces the nanofibers to be vertically arranged, a vertical pore gradient structure is constructed, moisture is rapidly diffused to form a stable humidity gradient field, ions are driven to continuously and directionally migrate, and the energy conversion efficiency and the output power stability are improved; finally, the binding force between the fibers is enhanced through metal salt crosslinking, a three-dimensional network is formed, the mechanical strength and swelling resistance are improved, structural collapse is prevented, it is ensured that the device is reliable for a long time in a humid environment, and the service life is prolonged.