44 results about "Moisture gradient" patented technology

An autofocus system and method designed to account for instabilities in the system, e.g. due to instabilities of system components (e.g. vibrating mirrors, optics, etc) and/or environmental effects such as refractive index changes of air due to temperature, atmospheric pressure, or humidity gradients, is provided. An autofocus beam is split into a reference beam component (the split off reference channel) and a measurement beam component, by a beam splitting optic located a predetermined distance from (and in predetermined orientation relative to) the substrate, to create a first space between the beam splitting optic and the substrate. A reflector is provided that is spaced from the beam splitting optic by the predetermined distance, to create a second space between the reflector and the beam splitting optic. The measurement beam component is directed at the substrate and a reflected measurement beam component through the first space between the substrate and the beam splitting optic, while the reference beam component is directed at the reflector and a reflected reference beam component is directed from the reflector through the second space between the beam splitting optic and the reflector. The reflected reference and measurement beam components are returned to the beam splitting optic, and emerge substantially collinear from the beam splitting optic. The reference and measurement beam components are then detected, and provide information that enables compensation for changes in the z position of the substrate that are due to instabilities in the autofocus system components and/or environmental factors.

The invention discloses a prestressed laminated wood with creep resistant deformation performance, and a preparation method and use thereof, and belongs to the field of a structural member of architecture. The prestressed laminated wood with the creep resistant deformation performance comprises a top compressive zone, a middle shear zone, a bottom tensile zone and an adhesive layer in the height direction of a wood beam; laminates inside and among the top compressive zone, the middle shear zone and the bottom tensile zone are cohered with each other by the adhesive layers to be fixed and formed; and for the laminated wood member which comprises the top compressive zone, the middle shear zone and the bottom tensile zone, the final moisture content of the wood of the three parts is the same, that is 10-12 percent. A principle is that high stress-grade structural wood is arranged in the tensile zone and the compressive zone of a wood beam of the laminated wood; a moisture gradient is set along the wood of the three parts with the heights; after the moisture content of the wood with different moisture contents is balanced and consistent, prestress is generated when the wood cannot be freely stretched and deformed fully because water loss shrinkage and hydroscopic expansion of the wood are inhibited, so that the creep resistant deformation performance of the wood beam of the laminated wood is obviously improved under the long-term load effect, inherent and natural defects which influence the mechanical property of the wood are overcome when the member is prepared initially; and the product has the advantages of stability and reliability in structural performance, high rigidity, excellent creep resistance, and can be used as bearing beams for the timber structure architecture.

The present invention relates to crop planting management technology, and is especially one soil water management and water gradient identification system for drought resisting screening and identification of plants. The system includes rain sheltering and ventilating shed over the field, sprinkling irrigation unit and drip irrigation unit set inside the shed, deep drainage ditches around the field and with water permeating holes, TDR pipes mounted in the ends and middle parts of the diagonals of the field, and temperature sensors and humidity sensors in different positions inside and outside the shed. The system may be used in the gradient soil water management from enough water to drought condition while ensuring the other basically identical conditions, and has raised accuracy and reliability.

The invention discloses a timber drying machine. The technical proposal is that the timber drying machine comprises a sealable pressure vessel provided with a door, wherein, the pressure vessel is provided with an internal separator board which divides the pressure vessel into a drying chamber and a heat exchange chamber which are communicated with each other; a heater is arranged in the heat exchange chamber; a circulating fan is arranged between the drying chamber and the heat exchange chamber; the pressure vessel is provided with a safety valve which is communicated with the exterior; the pressure vessel is also provided with a cooling device. The invention overcomes the deficiencies of the prior art that the energy consumption of the prior timber drying devices is high, atmospheric pressure high-temperature drying easily lead to higher level of moisture gradient and thus easy cracking and shrinkage, and the like. The invention provides a timber drying machine, which is used for drying or high temperature heat treatment in high-temperature and atmospheric environment, does not easily lead to higher level of moisture gradient and stress of timber, and ensures the drying quality and efficiency of timber.

A wood carbonization treatment method comprises the following steps: (1) stacking wood in a carbonization box to carry out balanced water content treatment, wherein the temperature in the carbonization box is 60-120 DEG C, the humidity is 100% RH, the working time is 96 hours, and the temperature raises in stages; (2) drying the wood, wherein the temperature in the carbonization box is 100-120 DEGC, the humidity is 100-20% RH, humidity gradient is decreased, and the working time is 72 hours; (3) carbonizing the wood, and raising the carbonizing temperature in the carbonization box from 120 DEG C to 190-220 DEG C, wherein 10 DEG C is raised every 2 hours and the carbonization speed is 10 mm/hour; and (4) after the carbonization treatment is finished, adding steam to humidify, so that the ambient temperature in the carbonization box is gradually reduced to 60 DEG C from above 150 DEG C; and when the temperature of the carbonization box is close to the outdoor temperature, taking out thewood. According to the method, the proportion of hot air to water vapor in warm and wet airflow is adjusted to achieve the purpose of thermal modification of the wood.

The invention provides a method for measuring an air density in weight mass measurement and a method for correcting a mass measurement result, which belong to the measurement field. The method comprises the following steps that: parameters of air surrounding a weight are firstly measured, then the air parameters are used for obtaining an air density, the air parameters include temperature, humidity and pressure and also include a content of carbon dioxide (CO2). By adopting a way that a plurality of temperature collecting points and at least two humidity collecting points are arranged inside a wind cap, the temperature and the humidity gradient parameters above a balance in the wind cap are obtained, so an accurate value of the air temperature and the accurate air humidity can be calculated to further obtain an accurate value of the air density; and the measurement of the CO2 content is further added in the method, and the influence factor of the CO2 is considered in the test result, so the test result is more accurate.

The invention relates to a method for testing the water environmental response characteristic of the allelopathic effect of reeds on phalaris arundinacea, and belongs to the field of physiological plant ecology and environmental sciences.By measuring the total content of phenolic acid allelochemicals in rhizosphere soil of the allelopathic donor reeds in a reed-phalaris arundinacea coexisting community in different moisture gradient environments, and the plant height, fresh weight, antioxidase system, photosynthetic gas exchange parameters and other growing physical indexes of the allelopathic receptor phalaris arundinacea, the correlational relationship among the moisture content of the soil, the total phenolic acid amount of the rhizosphere soil of the reeds and the growing physical indexes of the phalaris arundinacea, and the dynamic response of the total phenolic acid amount of the rhizosphere soil of the reeds and the growing physical indexes of the phalaris arundinacea along with the changes of the moisture content of the soil are analyzed, then the representative indexes are selected, and a fitted equation about increase/decrease of all the indexes along with reducing of the moisture content of the soil is constructed.By the application of the technical method, the theory of competitive coexistence among different species can be enriched, and guidance can be provided for stable maintenance of the phalaris arundinacea-reed coexisting community in constructed wetland.

The invention provides a microwave-hot air combined compound type rice drying method based on glass transition, and belongs to a grain drying technology. According to the method, a glass transition technology is combined with a microwave-hot air combined drying technology, in the condition that the moisture gradient between the inner and the outer of a rice grain is less than or equal to 6%, microwaves are used for rapidly heating the rice grain, the rice is dried by hot air when reaching the rubber state, and thus the operation is completed; and according to the method, the rate of cracking at a waist of the rice is reduced, the drying time is saved, the drying efficiency is improved, and the drying energy consumption is reduced.

The invention discloses a wireless type-based soil temperature and moisture gradient measuring system. The soil temperature and moisture gradient measuring system comprises sensor groups consisting of soil temperature sensors and soil moisture sensors, wherein each sensor group is arranged in a vertical gradient direction of soil to be measured, a sensor node is formed by multiple sensor groups in the same vertical gradient direction through an analog-digital conversion channel, a node transmission network is formed by a ZigBee wireless network and a routing node between every two sensor nodes, the node transmission network is connected with a central acquisition node through a multi-channel analog switch to form a star topology structure, and the central acquisition node carries out internal storage and precision calibration on data transmitted by the sensor node, and transmits the processed data to a data display terminal through an RS232/RS485 communication interface for observation and analysis. By adopting the technical scheme of the invention, the measurement of three-dimensional soil temperature and moisture is achieved, and each sensor node is used for wireless transmission of data, so that the energy consumption is low, and the applicable occasions are wide.

The application provides quick-cook rice and a preparation method thereof, and relates to the technical field of food processing. The quick-cook rice has different depths of cracks. In order to produce the different depths of cracks in the rice grains, the method utilizes techniques of microwave treatment, hot drying and the like to generate a moisture gradient inside and outside the rice grains,cracks are produced in all the rice grains, the depths of the cracks are different when different treatment methods are adopted, and no broken rice is produce. The rice treatment process at the earlystage can be carried out without adding water or adding only a small amount of water, so that the time of rice cooking at the later stage is obviously shortened; the method is convenient and efficient, all the excellent characteristics of rice are kept, a great deal of time is saved, and the quick-cook rice is of great significance for fast-paced life at present.

The invention provides a granary capable of dehumidifying and dissipating heat. According to the invention, the interior of the granary is provided with a grain storage chamber; the chamber wall of the grain storage chamber has a mesh structure; the mesh size of the mesh structure is no larger than the particle size of a grain; a gas channel is formed between the grain storage chamber and the inner wall of the granary; an exhaust device communicating with the exterior of the granary is connected with and arranged on the gas channel; a plurality of dehumidification pipelines in parallel connection are uniformly distributed in the interior of the grain storage chamber; each dehumidification pipeline is uniformly provided with a plurality of through holes; and the plurality of the dehumidification pipelines are connected with a gas inlet main pipe which extends to the exterior of the granary and is connected with an inert gas device arranged at the exterior of the granary. The granary provided by the invention solves the problems of non-uniform dehumidification and low dehumidification efficiency due to the presence of moisture gradients in the conventional grain dehumidification process, can quickly and uniformly dehumidify, and dissipates heat with high efficiency at the same time.

The invention discloses a preparation method of a cut tobacco moisture gradient experiment sample. According to the preparation method, cut tobacco samples of different outlet moistures are obtained by adjusting the set values of the flow of cut tobacco leaves, wherein the determination method of the flow of the cut tobacco leaves comprises the steps of establishing a mathematical model of the flow of the cut tobacco leaves, the moisture of the incoming material, the moisture of the outlet, and HT or SIROX moisture adding and standard work water removal points; determining the moisture of theincoming material, the HT or SIROX steam working pressure, the temperature of a drying cylinder body, the temperature of the drying hot air, and the value of HT or SIROX moisture adding and standard work water removal points; and enabling the moisture of the incoming material and the HT or SIROX moisture adding and standard work water removal points determined in the step two to be substituted into the mathematical model established in the step one, and working out the flow of the cut tobacco leaves corresponding to different outlet moisture. According to the method disclosed by the invention,the technical problem in preparation of a plurality of outlet moisture experimental samples in one batch is solved under the condition that the temperature of a KLD-2 drying cylinder body and the hotair temperature are not changed.

The invention discloses a method for multistage wet method removal of PM2.5 in industrial tail gas. The method is characterized in that industrial tail gas is orderly treated by multistage gas washing units, in each grade of the gas washing unit, the industrial tail gas goes through a heating humidifying chamber and then enters into a condensation chamber, each grade of the heating humidifying chamber is used for heating the industrial tail gas at a temperature of less than 100 DEG C before entrance to a temperature of 100 DEG C or more, through humidifying, the industrial tail gas has a water vapor mass rate of 20-50%, a falling film flowing cold absorption liquid is fed into the condensation chamber in each grade of the gas washing unit so that across flowing of the cold absorption liquid and the industrial tail gas is formed, and under action of temperature and humidity gradient, PM2.5 in the industrial tail gas directionally moves to the surface of the cold absorption liquid and then is captured by the cold absorption liquid so that PM2.5 removal is realized. Through multistage heating, humidification and condensation means, the problem that the single stage gas washing process has poor driving force at the rear section because of temperature and humidity difference of the industrial tail gas and the cold absorption liquid is solved so that a PM2.5 removal rate is improved.

The invention relates to an asphalt penetration type water vapor diffusion coefficient detection method. The method comprises the following steps: preparing an aggregate sample coated with an asphaltoil film; measuring the moisture diffusion coefficient of a test piece sheet through a first formula and a detection device, wherein the test piece sheet comprises an aggregate sample which is not coated with an asphalt oil film and the aggregate sample coated with the asphalt oil film; respectively measuring the thicknesses of the first asphalt oil film, an aggregate layer and the second asphaltoil film; and determining the penetration type water vapor diffusion coefficient of the asphalt oil film through a second formula. According to the invention, the test of the asphalt penetration typewater vapor diffusion coefficient under specific temperature and different relative humidity gradients can be realized, the test materials are simple and easy to obtain, the test method is simple andeasy to operate, and a basis is provided for detecting the water damage mechanism of the asphalt mixture.

A plenum flooring system is installed over high density insulation panels, capable of preventing both heat loss to ground and intrusion of ground moisture into the flooring plenum space. The system is comprised of one or more flooring segments, each containing at least one surface opening to the plenum space, and a plenum ventilation system. The ventilation system includes a blower and air inlet openings in seals that are arranged along the perimeter of the plenum flooring segments at the walls of the interior of the poultry housing unit. The blower withdraws air from the plenum space through the surface opening of the flooring segment and discharges it into the poultry housing unit chamber, creating a continuous flow of ventilation air to maintain uniform flooring surface temperatures and remove moisture that migrates to the plenum space from manure on the perforated flooring surface due a moisture gradient. The plenum ventilation system further includes a refrigerated dehumidifier/air circulation unit to condense moisture in the chamber air and discharges the condensate liquid to the housing unit exterior.

The invention discloses a contaminated soil temperature and moisture gradient measuring system. The system comprises Zigbee nodes corresponding to each soil detection point in a one-to-one mode and sensors which are arranged at the soil detection points and connected with corresponding Zigbee node interfaces. Each sensor comprises a sensor group formed by a soil temperature sensor and a soil moisture sensor. Each of the sensor groups is arranged in a vertical gradient direction of soil to be measured. Multiple sensor groups in the same vertical gradient direction are connected to a Zigbee gateway through a Zigbee communication channel, the Zigbee gateway is connected to a data service center through an Ethernet network, the data service center is connected to a user management client through the Ethernet network, and the user management client transmits processed data to a data display terminal to observe and analyze through an RS232/RS485 communication interface. According to the invention, the measurement of three-dimensional soil temperature and moisture is achieved, each sensor node transmits data in a wireless mode, the energy consumption is low, and the application occasions are wide.

The invention discloses a novel stone texture modifying agent. The novel stone texture modifying agent comprises, by mass, 5 to 10% of a surfactant, 1 to 3% of an anti-foaming agent, 20 to 50% of deionized water, 8 to 15% of a titanium metal salt mixed solution, 5 to 10% of a dispersant, 13 to 25% of perfluorooctyl methacrylate, 5 to 8% of a chelating agent, 0.5 to 1% of a catalyst, and 10 to 15%of an ammonium persulfate solution. The beneficial effects are that: nanometer inorganic material nanometer titanium metal mixed solution and fluorocarbon are adopted, so that acid and alkali resistance better than that of organosilicon is achieved, destroy caused by moisture gradient or saline-alkaline region nature is not easily caused, excellent external pollutant resistance is achieved, organosilicon environment pollution is avoided at the same time, historical relics and bridge pier reinforcing effects are achieved, building aging resistance is improved, and service life is prolonged.

The invention discloses a method for determining critical moisture of easy spontaneous combustion of coal, and belongs to the technical field of disaster prevention and control of the spontaneous combustion of the coal underground coal mines. The method comprises the following steps that (1) a calculation model of a critical temperature of the spontaneous combustion of the coal based on CO concentration is established; (2) the natural moisture content a and the saturated water content c of the coal are tested by a nitrogen-introducing drying method, and a suitable moisture gradient is designed; (3) a micro-syringe is used for proportionally adding water to prepare experimental coal samples with different water content; (4) the CO concentration of the coal samples with the different water content at 30-180 DEG C is tested by gas chromatograph; (5) lnC<out> to 1/T curves of the coal samples with the different water content are subjected to two-segment linear fitting, and correlation coefficients of the spontaneous combustion of the coal in different reaction stages are S1 and S2 separately; (6) the critical temperature of the spontaneous combustion of the coal is determined by the maximum value of K=S1S2; and (7) the critical moisture b of the easy spontaneous combustion of the coal is determined by the principle of minimum value. The method can realize quantitative determinationof the critical moisture of the easy spontaneous combustion of the coal.

The present invention provides 'dry' packaging in which a prosthetic heart valve is packaged within a container with hydrogel (116) that can be provided in many forms. Certain embodiments include hydrogel (116) that is preloaded with glycerol or the like. The hydrogel regulates the humidity within the container through a diffusion-driven mechanism if a gradient of humidity between the inside and the outside of the hydrogel exists. Humidity regulation is important to prevent the tissue of the valve structure from drying out. When the partially-hydrated hydrogel (116) is present within container, which is saturated with air of a predefined humidity, the water molecules from the air will be absorbed by the hydrogel if the air humidity is high (i.e. when the thermodynamics favor hydrogel hydration) or vice versa. Various embodiments are configured to also house at least a portion of a delivery device for delivering the prosthetic heart valve.

The invention discloses a method for matching corresponding drying shrinkage under humidity gradient in a cement-based material, which comprises the following steps of: matching acquired humidity gradient data at each position in a cement-based sample with acquired drying shrinkage gradient data at each position in a parallel sample, and thus, the drying shrinkage condition of each position in the cement-based sample under the corresponding humidity is obtained. According to the method, the corresponding relation between the continuous humidity field and the strain field in the same sample can be obtained in a short time, and the experiment time and resource consumption are greatly reduced. Compared with a traditional method, the obtained strain is under the real-time and real humidity gradient in the drying process, interference of the time effect of long-time drying is avoided, the number of statistical points reaches tens of thousands, errors of manual calculation are reduced, and the method is an effective method for accurately and rapidly obtaining the cement concrete internal humidity-drying shrinkage deformation relation.

The present disclosure relates to an article for enriching soil fertility, a method of manufacturing the same and a method of enriching soil fertility. The article comprising a container comprising afluid-permeable membrane, a fertilizer disposed in the container and a moisture regulator disposed in the container. The moisture regulator is configured to repeatedly absorb moisture from outside thecontainer and release the absorbed moisture into a space within the container based on a moisture gradient existing between the space within the container and outside the container, to control a release of the fertilizer from the container through the membrane. The moisture regulator is further configured to form a base in the space within the container to harbor moisture-sensitive microbes, themicrobes being transferable through the membrane based on the moisture gradient.

The invention provides an integrated grain barn structure for drying and storing grains. The integrated grain barn structure for drying and storing the grains comprises a grain barn body, wherein a grain storage chamber is arranged in the grain barn body; a chamber wall of the grain storage chamber is of a mesh-shaped structure; the mesh hole size of the mesh-shaped structure is not larger than the grain particle size; an air channel is formed between the grain storage chamber and an inner wall of the grain barn body; an air inlet channel communicating with the outer part of the grain barn isconnected onto the air channel; the grain storage chamber comprises multiple grain storage units arranged up and down; a drying device is arranged between each two adjacent grain storage units, and comprises a mesh-shaped clapboard and a drying mechanism located on the mesh-shaped clapboard; the mesh hole diameter of each mesh-shaped clapboard is not larger than the grain particle size; and an airdischarge device communicating with the outer part of the grain barn body is further arranged on the upper part of the grain storage chamber. The integrated grain barn structure for drying and storing the grains solves the problems that an existing grain drying process is complicated, the grains cannot be dried uniformly, and the drying efficiency is low due to a moisture gradient, the integration of drying and grain storing can be realized, the drying efficiency is improved, and meanwhile, a drying and grain storing process is simplified.