105results about How to "Limit diffusion" patented technology

The invention discloses a preparation method and an application of a gypsum retarder. The gypsum retarder is prepared from a diacid or anhydride material and an ammoniacal material or L-aspartic acid; the retarder prepared by use of the preparation method is added to gypsum so as to increase the setting time of a gypsum building material and reduce the strength loss of a hardened gypsum body. The retarder is a water-soluble amino acid degradable polymer, has excellent biodegradability and is a green and environment-friendly polymer material. The molecular structure of the retarder contains a large number of groups such as carboxyl, carbonyl and acyl, and the groups can be combined with Ca<2+> into complexes so that the dissolution velocity of the gypsum can be reduced, the diffusion of Ca<2+> to gypsum crystals can be restricted and hydration of gypsum particles can be hindered, and therefore, the retarding effect of the retarder is realized. Meanwhile, the strength loss caused by structural degradation of gypsum holes due to a high water-gypsum ratio is reduced.

The invention belongs to the field of electrochemistry and discloses multiwalled carbon nanotube / sulphur / polyaniline composite cathode material, a preparation method thereof, and the application thereof to the preparation of lithium sulphur batterypositive plates. The material adopts multiwalled carbon nanotube / sulphur / polyaniline composite cathode material and a sandwich structure; multiwalled carbon nanotube / sulphur composite material is coated with conductive polyaniline through in-situ polymerization, so that the multiwalled carbon nanotube / sulphur / polyaniline composite cathode material is formed; the multiwalled carbon nanotube / sulphur composite material is prepared through chemical co-deposition. The method is simple in technology, low in cost and high in consistency and stability of products. The material is high in electronic and ionic conductivity and high in sulphur carrying capacity, and can be applied to the preparation of lithium battery composite positive plates; the positive plate is high in cycling stability and capacity retention ratio.

The invention discloses a lithium-sulfur battery using nitride / graphene as separation layers and a positive electrode and a preparation method thereof. The lithium-sulfur battery consists of a positive electrode, a diaphragm, an electrolyte and a negative electrode, wherein the positive electrode contains sulfur which is coated onto an aluminum foil; then, a layer of separation layer based on nitride / graphene is coated; due to the existence of the nitride and graphene in the separation layer; the conducting performance of the battery is improved; the diffusion of polysulfide can also be effectively inhibited, so that the shuttle effect can be effectively relieved; the electric chemical performance of the battery can be improved.

The invention discloses a method for preparing an oxide dispersion strengthened iron-based alloy, belonging to the field of powder metallurgy materials. The method comprises the following steps: mechanically ball-grinding Y and Ti element alloyed atomized iron-based pre-alloyed powder for 12-24h in air atmosphere, to prepare oxygen-containing powder in which oxygen is evenly distributed, and performing thermal consolidation forming and thermal treatment to obtain nano-oxide dispersion strengthened iron-based alloy. Oxygen in the ball-grinding atmosphere is introduced into the powder matrix through mechanical ball grinding, nano-scale oxide strengthening phase can be evenly precipitated from the alloy matrix through thermal consolidation forming and thermal treatment, long-time ball grinding can be avoided, and the mechanical alloying time of the traditional preparation technology can be shortened; the formed nano-oxide second phase is evenly distributed in the matrix in a dispersed manner, and the room temperature and high-temperature strength of the alloy can be effectively increased; the preparation technology is simple, and the prepared alloy has excellent room-temperature and high-temperature mechanical performances, and is suitable for industrial large-scale preparation.

The invention belongs to the field of electrochemical energy and discloses a nitrogen doped porous carbon / sulfur composite positive material as well as a preparation method and an application thereof in preparation of a lithium-sulfur battery positive plate. The nitrogen doped porous carbon / sulfur composite positive material disclosed by the invention is prepared by adopting a sulfur-ammonium chemical precipitation method; three-dimensional wedged nitrogen-containing porous carbon and sulfur particles form a core-shell structure, so that the electronic and ionic conductivity of the composite positive material are improved; meanwhile, the sulfur bearing capacity is also improved, dissolution and diffusion of polysulfides are limited, and thus the circulation stability and the capacity retention rate of a composite electrode prepared from the nitrogen doped porous carbon / sulfur composite positive material disclosed by the invention can be effectively increased. The preparation method can be used for accurately controlling the content of loaded sulfur without complex pretreatment and post-treatment procedures, so that the process cost is greatly lowered, the process operation is simplified, and the consistency and the stability of the composite material are improved as well.

The invention discloses a plasma generating device, which comprises a shell (12), a Helmholtz coil (11), a negative pole (9), and a positive pole (10); the interior of the shell (12) is a vacuum cavity; the Helmholtz coil (11) is arranged coaxial with the shell (12); the negative pole (9) is positioned in the shell (12); the positive pole (10) is positioned in the shell (12) and opposite to the negative pole (9); the negative pole (9) is of a hollow metal tube structure with an opening along the axial direction, the opening direction is opposite to the positive pole (10), and the negative pole (9) and the positive pole (10) are arranged parallelly. In the invention, high density and large area plasma plate is generated by adopting magnetic confinement linear hollow negative pole dischargemode, thus having enhancing plasma density by hollow negative pole, and forming the uniform plasma plate (13) with density being over 10<12>cm<-3>, geometric size being over 60cm*60cm and thickness kept around 2cm. The high density and large area plasma has enormous advantage in aspects such as material surface treatment, research on interaction between plasma and electromagnetic wave, etc.

The invention provides a laser-enhanced three-dimensional micro-region electro-deposition method. the method integrates laser irradiation into a microtubule-based micro-region electro-deposition device to obtain an improved deposition rate. Electrolyte is poured into an electrolyte chamber and a microtubule, a tip of the microtubule is close to a sample surface by the regulation of a translation stage, a droplet at the tip of the microtubule forms a meniscus on the sample surface so that the diffusion of the droplet on the sample surface is limited, and machining accuracy of electro-depositionis beneficially controlled. As the electrolyte in the microtubule is connected with the positive potential and the surface of a conductive sample is the negative potential, the electro-deposition process can occur. The laser is irradiated on the contact surface between the droplet and the sample, and a laser thermal effect improves the electron transfer efficiency in the electrolyte, acceleratesthe positive shift of the electrochemical balance potential and causes local eddy current stirring in the droplet, and therefore accelerates the electro-deposition process. According to the preset pattern, the electronic control transition stage movement is regulated, so the three-dimensional relative movement of the microtubule and the sample surface is realized.

The invention discloses a multi-layer electrode structure for a lithium sulfur battery and a preparation method thereof. The multi-layer electrode structure comprises a current collector (1) and a multi-layer covering layer attached to the current collector (1), wherein the multi-layer covering layer has a loose porous layer (2), a conductive skeleton layer (3) and a confinement layer (4) which covers an electrode surface, close to the current collector (1) along a direction perpendicular to the current collector (1). The loose porous layer in the multi-layer electrode structure has a large pore structure and a high porosity, and can fully contain a sulfur active material, electrolyte and a multi-sulfide-ion charge-discharge product; the conductive skeleton layer in the middle provides a high-activity reaction interface for a charge-discharge reaction of the lithium sulfur battery by using a large specific surface area; the confinement layer on the electrode surface limits the diffusion of multiple sulfide ions; and the multi-layer electrode structure provided by the invention solves the problems of low sulfur utilization rate and poor cycle stability under high sulfur content andhigh sulfur loading of the lithium sulfur battery.

The invention discloses sodium iron chlorophyllin-chitosan / sodium alginate microcapsules and a preparation method thereof. In the method, chitosan / sodium alginate is used as a capsule material, sodium iron chlorophyllin is used as capsule content, and the sodium iron (II) chlorophyllin is microencapsulated by an emulsification-gel method. The preparation method comprises: dissolving sodium iron chlorophyllin in sodium alginate solution at a certain concentration, adding the prepared solution in vegetable oil containing Span-60, and stirring at high steep and emulsifying for 20 minutes; dripping acetic acid aqueous solution containing 2.0-percent chitosan and calcium chloride, continuously stirring for 30 minutes, standing for 2 hours and removing an oil phase; and washing the microcapsules with petroleum ether and isopropanol for three times respectively, performing suction-filtration, and drying at room temperature to obtain the sodium iron chlorophyllin-chitosan / sodium alginate microcapsules. The chitosan which is a natural polysaccharide with high biocompatibility and biodegradability and the sodium alginate serve as sustained and controlled release agent and targeting preparation, the sodium iron chlorophyllin is encapsulated in the center of the microcapsules to be protected from instability caused by change in a light or placing condition, a new formulation is provided in pharmacy, and the microcapsules are suitable to be further developed and used as iron-supplying health-care food and new medicinal preparation for treating iron-deficiency anemia, and have a bright application prospect.

This invention discloses a method for dividing a data communication network and diffusing route information, in which, said data communication network includes multiple NE to be divided into different regions and the NE includes border NE, the method includes: configuring ports of said border NE in terms of domain ID, when a change happens to the route path in a domain, its route information is diffused to outside only when a predefined condition is met, when the route information of a domain in the border NE is changed and the accessibility of the NE is changed, its route information can be diffused to other domains by connecting with ports of other domains connected by said border NE.

The invention relates to a pine moth sex pheromone microcapsule and a preparation method thereof, belonging to the field of embedding technology for the pine moth sex pheromone microcapsule. The microcapsule comprises a microcapsule wall material and a microcapsule core material, wherein the microcapsule wall material is a prepolymer liquid formed by reaction among methyl methacrylate, methacrylic acid and an initiator, the microcapsule core material comprises pine moth sex pheromone and liquid paraffin, and pine moth sex pheromone is cis-5,trans-7-dodecadienal, cis-5,trans-7-codlemone, cis-5,trans-7-dodecadienyl acetate and / or cis-5-dodecadienyl acetate. The microcapsule provided by the invention has the advantages of sensitivity, specificity, high efficiency, a long lasting period, degradability, good biocompatibility, no pollution to the environment, low price, etc., can be used for population monitoring and large-scale trapping and killing and control of pine moth, is capable of accurately predicating next-generation population occurrence density and has good economic benefits and ecological benefits.

The invention relates to a CoSe2 / hollow carbon nanosphere / S composite lithium-sulfur battery positive electrode material and a preparation method thereof. The preparation method comprises the following steps: (1) adding hollow carbon nanospheres into a methanol solution dissolved with cobalt nitrate hexahydrate, and carrying out stirring; (2) carrying out washing and drying to obtain a solid product; (3) carrying out heat preservation on the obtained solid product to obtain Co / hollow carbon nanospheres; (4) uniformly mixing the obtained Co / hollow carbon nanospheres with selenium powder, and carrying out heat preservation again to obtain CoSe2 / hollow carbon nanospheres; and (5) uniformly mixing the obtained CoSe2 / hollow carbon nanospheres with sulfur powder, and carrying out heat preservation to obtain the CoSe2 / hollow carbon nanosphere / S composite material. The composite positive electrode material prepared by the invention has high cycling stability when being used as a lithium-sulfurbattery positive electrode material, and can be widely applied to the field of preparation of the lithium-sulfur battery positive electrode material; and the preparation process of the cathode material is controllable, raw materials are easy to obtain, and the cost is low.

The invention relates to a Ge-Sb-Te Ge-enriched N-doped phase-change material for a phase-change memory. The Ge-Sb-Te Ge-enriched N-doped phase-change material for the phase-change memory, provided by the invention, comprises chemical components which accord with a chemical formula as follows: Nx[(Ge1+yTe)a(Sb2Te3)b]100-x, wherein y is more than 0 but not more than 3, x is more than 0 but not more than 35, a is equal to 1 or 2 and b is equal to 1 or 2. The phase-change material is a storage material which has a reversible phase change under the effects of external energy. When a magnetic control sputtering is adopted, atom percentage contents of all the components are adjusted through controlling a power supply power of each target material and each target position and the N2 / Ar2 flow ratio so that phase-change storage materials with different crystallization temperatures, smelting points and crystallization activation energies are obtained. Compared with the traditional Ge2Sb2Te5 thin-film material, the Ge-enriched N-doped phase-change material provided by the invention has the advantages of higher crystallization temperature, better data keeping capability, better heat stability, lower power consumption and the like.

The invention discloses a fuel gas water heater. The fuel gas water heater comprises a heat exchanger. The heat exchanger is formed by a plurality of heat exchange sheets arranged in parallel and an end cover. The water heater comprises a water heater casing, a heat exchange body, a fire disc, an ignitor, a cold water pipe and a hot water pipe, wherein the heat exchanger is mounted in a condenser jacket. Compared with the prior art, the fuel gas water heater is higher in heat exchange efficiency, the energy utilization rate of the water heater is high, and the heat loss is less.

The invention discloses a gravity type foundation pit supporting system under a vacuum effect and a construction method. The system comprises a peripheral vertical sealed curtain, a pit top horizontal sealing layer, a transverse drainage body, a slope surface sealing layer, a slope bottom vertical sealed curtain, a pit top vertical drainage body and a slope surface vertical drainage body. The peripheral vertical sealed curtain is downward vertically installed from an outside boundary of a setting range of the pit top horizontal sealing layer; the pit top vertical drainage body is arranged in foundation soil of the setting range of the pit top horizontal sealing layer; the transverse drainage body is arranged on the surface of the foundation soil at a top end of the pit top vertical drainage body; the pit top horizontal sealing layer is formed on the surface of the transverse drainage body; the slope surface vertical drainage body is arranged in the foundation soil inside the pit top vertical drainage body; the slope surface sealing layer is formed on the slope surface vertical drainage body; the slope bottom vertical sealed curtain is formed in a slope foot of a pit bottom. In the gravity type foundation pit supporting system under the vacuum effect and the construction method provided by the invention, a side wall is not arranged to solidify a wall body and a curtain shielding body, a greater cutting depth requirement can be met, construction cost is low and construction period is shorter.

The invention discloses a cooking bench air curtain, which comprises a U-shaped opening-type or closed-type annular air pipe, wherein the air pipe is provided with an opening which is directly connected with an air outlet of a fan, and the upper surface of the air pipe is provided with an elongated air outlet forming the air curtain. The cooking bench air curtain is reasonable in structure, the oil smoke can be limited in the area of the cooking bench, and the dispersion of the oil smoke can be limited; the opening of the air pipe is directly connected with the air outlet of the fan, so that the problem of the inconvenience in installation caused by excessive pipelines can be effectively avoided.

The invention relates to a Ge-Sb-Te Ge-enriched N-doped phase-change material for a phase-change memory. The Ge-Sb-Te Ge-enriched N-doped phase-change material for the phase-change memory, provided by the invention, comprises chemical components which accord with a chemical formula as follows: Nx[(Ge1+yTe)a(Sb2Te3)b]100-x, wherein y is more than 0 but not more than 3, x is more than 0 but not more than 35, a is equal to 1 or 2 and b is equal to 1 or 2. The phase-change material is a storage material which has a reversible phase change under the effects of external energy. When a magnetic control sputtering is adopted, atom percentage contents of all the components are adjusted through controlling a power supply power of each target material and each target position and the N2 / Ar2 flow ratio so that phase-change storage materials with different crystallization temperatures, smelting points and crystallization activation energies are obtained. Compared with the traditional Ge2Sb2Te5 thin-film material, the Ge-enriched N-doped phase-change material provided by the invention has the advantages of higher crystallization temperature, better data keeping capability, better heat stability, lower power consumption and the like.

The invention aims to provide a multistage resistive random access memory and a manufacturing method of the multistage resistive random access memory. The multistage resistive random access memory comprises a substrate, a bottom electrode, a resistive layer and a top electrode, wherein the substrate, the bottom electrode, the resistive layer and the top electrode are arranged from bottom to top in sequence. The multistage resistive random access memory is characterized in that an isolation layer is further arranged between the bottom electrode and the resistive layer. According to the multistage resistive random access memory and the manufacturing method of the multistage resistive random access memory, the nanoscale isolation layer is additionally arranged, so that the magnitude of a storage window of the resistive random access memory is increased to over 105, and the primary condition needed by multistage storage is met; electrochemical active materials are used as the top electrode, different resistance states are achieved under the condition of different voltage drives through the drifting character of the electrochemical active materials, and the purpose of multistage storage is achieved; in addition, due to the additional arrangement of the isolation layer, dissipation of oxygen ions in the movement process is reduced, the bottom electrode is effectively protected, and the stability of a device is improved. In addition, the manufacturing method of the multistage resistive random access memory is simple and easy to control.

The invention discloses a training method and device for a longitudinal federated learning model, and relates to the field of big data and the technical field of computers such as deep learning. According to the specific implementation scheme, the training method is applied to first participant equipment, and the first participant equipment has label data. The longitudinal federated learning model comprises a first bottom layer sub-model in the first participant device, an interaction layer sub-model, a top layer sub-model based on a Lipschitz neural network and a second bottom layer sub-model in the second participant device. And obtaining first bottom layer output data of the first participant device and second bottom layer output data sent by the second participant device, inputting the first bottom layer output data and the second bottom layer output data to the interaction layer sub-model to obtain interaction layer output data, obtaining top layer output data according to the interaction layer output data and the top layer sub-model, and sending the top layer output data to the interaction layer sub-model. And training a longitudinal federal learning model according to the top output data and the label data. According to the invention, the anti-attack capability of the federal learning system can be improved.

The invention discloses a vortex ventilation method and system applied to a high space building. According to the vortex ventilation method, air entering an air inlet in a wall of the high space building passes through a guide plate at an outlet of the air inlet and is guided to flow to the same clockwise direction, then diffuses and flows to a working area in the form of vortex air flow, and thenis discharged through an air outlet in the top of the working area; since a columnar air vortex has obvious entrainment force, high-density pollutants accumulated on the lower portion of a room can be sucked into a roof exhaust device in an entrainment mode and discharged out of the room by using smaller ventilation volume, so that the air volume is effectively reduced, and the ventilation efficiency is improved; and through the convergence effect of vortex ventilation in a lower ventilation control area, the pollutants are limited to diffuse to an area outside the ventilation control area, and thus the overall indoor environment is effectively improved.

The invention provides an alloy plate for an automobile body and a preparation method of the alloy plate. An alloy comprises, by mass percentage, not larger than 0.4% of Si, not larger than 0.4% of Fe, 0.2-0.5% of Mn, 3.0-6.0% of Mg, not larger than 0.03% of Cr, not larger than 0.15% of Cu and the balance Al and impurities. According to the alloy plate and the preparation method, by controlling the content of the trace element Cr and the final annealing process and the straightening amount, on one hand, the YPE of the plate is reduced, and on the other hand, the plate still has excellent mechanical and forming properties of the material. The preparation method comprises the following steps that final annealing is carried out on a continuous annealing line, wherein the temperature rise speed is larger than 20 DEG C / s, and after heat preservation at 480-520 DEG C is carried out for 15 s and 5 min, water quenching is carried out, and the cooling speed is larger than 10 DEG C / s; the finalgrain size should be controlled at 20-40 micrometers, and the YPE is smaller than or equal to 0.2%; and the final annealing plate is subjected to straightening treatment, and the straightening amountis 0.5-1%. The plate prepared by the method is suitable for an automobile body structural member and an automobile body covering panel inner plate.

The invention relates to a stabilizing material which is prepared from the following raw materials in parts by weight: 70-85 parts of sulfoaluminate cement, 5-15 parts of ordinary Portland cement, 5-10 parts of quicklime and 5-10 parts of core material. The core material is formed by mixing the following components in parts by weight: 2-5 parts of calcined ardealite powder, 0-2 parts of water-reducing agent and 2-8 parts of porous carrier. The invention also relates to a preparation method of the stabilizing material and application of the stabilizing material in treating well-drilling waste, making roadbed materials and making concrete pavement bricks.

A method of wafer level manufacturing and assembly of a liquid crystal optical device is disclosed. An electro-optic device having at least one liquid crystal cell for providing spatially variable control of light is also described. The electro-optic device includes: a pair of opposed substrates sandwiching a liquid crystal layer therebetween; a pair of electrodes for applying an electric field therebetween, each electrode being deposited on a corresponding substrate; and a liquid crystal reservoir wall defining a lateral extent of the liquid crystal layer between the substrates. The reservoir wall includes: a first bottom barrier deposited on a bottom one of the pair of substrates; and a second curable top barrier deposited on the top substrate outside the first barrier. The first barrier and second uncured barrier are configured to merge on contact to retain liquid crystal material inside the reservoir wall prior to curing the second barrier.

Described is a polymerization method comprising: providing a substrate; coating at least a portion of said substrate with a polymerizable composition; providing an electron beam that is capable of producing pulses of accelerated electrons; and irradiating said polymerizable composition with said pulses of accelerated electrons to polymerize said polymerizable composition. Under certain conditions, the polymerization takes place heterogeneously.

The invention discloses a bundling device for straw bundling. The bundling device comprises a base; a winding groove is formed in the base; a winding motor is fixedly installed on one side of the winding groove; a winding roller is fixedly connected to the output end of the winding motor; a limiting rod is fixedly installed in the winding groove; a limiting roller is fixedly installed on the surface of the limiting rod; supporting frames and arc-shaped limiting plates are fixedly installed at the upper end of the base; the arc-shaped limiting plates are located between the supporting frames; supporting plates are fixedly connected to the upper ends of the supporting frames; supporting rods are fixedly installed at the upper ends of the supporting plates; a binding wire roller is fixedly installed between the supporting rods; a binding wire is wound around the surface of the binding wire roller; and a tightening ring is fixedly installed between the arc-shaped limiting plates. The bundling device is simple in structure and novel in design; and straws can be tightly fixed together in a bundling process and can be directly bundled, so that the straw bundling efficiency can be effectively improved.

The invention relates to a preparation method of nano plate, in particular to a preparation method of metal nano plate or metal / high polymer composite nano plate. In laminated liquid crystal having laminated nano water layer and laminated nano oil layer of even thickness, the electro-deposition process is adopted to prepare the metal nano plate or metal / high polymer composite nano plate of even thickness. The invention utilizes the structure of laminated liquid crystal having laminated nano water layer and laminated nano oil layer of even thickness simultaneously to restrict the dispersion of reactants, the position of electro-deposition and the growth orientation of electro-deposit to generate the nano plate, so that the nano plate has even thickenss and is uneasy to agglomerate. The preparation is simple in process, low in cost, fast in speed, even in structure and high in universality, the appearance, thickness, size and the like of the nano plate can be conveniently controlled by adjusting the structure of laminated liquid crystal.

The invention provides a mesoporous Me / UIO-66-Zr MOF material as well as a preparation method and application thereof, and belongs to the technical field of nano material preparation. The mesoporous Me / UIO-66-Zr MOF material prepared in the invention can be used for immobilization of cellulase, the obtained immobilized enzyme Cellulase@ Me-UIO-66-Zr improves the stability and the reusability of cellulose dissolution, and the mesoporous Me / UIO-66-Zr MOF material can be used for overcoming the defects of the free cellulase in the aspects of pH stability, thermal stability, storage stability andthe like while accelerating diffusion of a macromolecular substrate.

The invention provides a silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material, a preparation method and an application thereof. The technical scheme is that the preparation method comprises the following steps: mixing and grinding a carbon tube and elemental sulfur, adding CS2 and fully stirring, after that, drying to obtain a carbon tube sulfur-loaded composite material; and mixing the carbon tube sulfur-loaded composite material with carbon black and polyvinylidene fluoride according to a certain mass ratio, then adding N-methylpyrrolidone and the silicon-based molecular sieve, stirring and performing ultrasonic dispersion to be uniform, controlling the viscosity to be 1,000 to 10,000cps to obtain slurry, uniformly coating the obtained slurry on acurrent collector aluminum foil with a thickness of 150 to 400mm, then transferring the aluminum foil to a drying oven at 40 to 60 DEG C to obtain the silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material. The preparation method disclosed by the invention is simple to operate and easy for large-scale production; the prepared silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material is used for a lithium-sulfur battery, so that the dissolution of polysulfide ions in liquid electrolyte in the charging and discharging process of the lithium-sulfur battery can be solved, a shuttle effect is effectively inhibited, and the coulombic efficiency and the cycling stability of the lithium-sulfur battery are improved.

The invention discloses a method for treating hexavalent chromium ions in soil by combining grouting with electro-osmosis. The method includes the steps: S1 drilling holes in the soil to be treated, setting grouting holes, and arranging negative electrodes and positive electrodes of electro-osmosis devices on the peripheries of the grouting holes; S2 injecting grouting materials with reduction, adsorption and gelatinizing performances into the grouting holes through an injection pump, and starting the electro-osmosis devices after grouting is completed to perform electro-osmosis treatment; S3collecting water solution at negative electrodes of the electro-osmosis devices, detecting the concentration of the hexavalent chromium ions in the water solution, stopping construction if the concentration of the hexavalent chromium ions meets design requirements, and repeating the step S2 and the step S3 if the concentration of the hexavalent chromium ions cannot meet design requirements. A grouting treatment method and an electro-osmosis treatment method are combined, so that the method is simple and convenient to operate, short in treatment period, large in treatment area, high in efficiency and applicable to soil layers with all natures.

To print air-permeable textile material (8), successive areas of the textile material (8) to be printed are brought incrementally into an area (5) covered by at least one ink jet print head (1). By means of the ink jet print head (1) ink is selectively applied to the textile, according to predetermined picture information. Ink applied to the textile material (8) is finally subjected to a treatment for fixing the ink. By keeping the textile material (8) tensioned in the area (5) covered by the ink jet print head (1) over a free space (28) on the side of the textile material (8) remote from the ink jet print head (1), an improved penetration and adhesion of the ink and a limitation of the spreading of the ink are ensured. Furthermore, an apparatus for printing textile tensioned over a free space is described.