492results about How to "Play an isolation role" patented technology

The invention provides a Docker implementing system and a communication method thereof. The Docker implementing system comprises a management VPC and a user VPC. Each VPC comprises a virtual routing device and a virtual machine. The management VPC comprises a VPC management module, a control node, a container database, and a configuration service discovery storage system. The virtual machine of the user VPC is provided with a local container management module, a proxy module, and containers. The containers are used for storing the application of a user. A safe tunnel is provided between the virtual routing device of the management VPC and the virtual routing device of the user VPC. The control node sends messages to the virtual machine of the user VPC via the safe tunnel between the virtual routing device of the management VPC and the virtual routing device of the user VPC. The virtual machine of the user VPC transmits the messages to the local container management module of the virtual machine of the user VPC. The Docker implementing system may reduce a risk that the application of the user is attacked by other users and improve system security.

The invention relates to the field of release agents, in particular to a method for obtaining a release agent layer on a base plate and a composite material containing the base plate and the release agent layer. The method for obtaining the parting agent layer on the base plate comprises coating a release agent on the base plate, and drying to form the parting agent layer on the base plate. The method is characterized in that the release agent comprises water, alcohol, epoxy resin and Al2O3 powder, wherein relative to 100g of Al2O3 powder, the dosage of the water is 300-600mL, the dosage of the alcohol is 300-600mL, and the dosage of the epoxy resin is 5-15mL. The release agent can be online directly sprayed on the surface of a composite titanium board, and can be quickly cured to form a self-drying type coating to achieve a parting effect, so that in a 4-6h constant-temperature process at 800-1000 DEG C and a rolling process of a titanium steel composite board, adhesion and surface roughness increase phenomena of a titanium-titanium interface are avoided, and the yield and the production efficiency for titanium steel composite board processing are improved.

The invention discloses a hydrofining catalyst and a preparation method thereof, belonging to the field of catalysts used in the petroleum-chemical industry. The hydrofining catalyst disclosed herein comprises a carrier, an active component and an auxiliary agent, wherein the carrier is Ti-modified gamma-alumina, the active component comprises oxides of Mo, Co and Ni, and the auxiliary agent comprises oxides of rare earth. The catalyst is characterized in that: based on 100% of the total weight of the catalyst, Co (measured in CaO) in the active component accounts for 2.0-7.5% of the total weight of the catalyst, Mo (measured in MoO3) in the active component accounts for 4.0-18.0% of the total weight of the catalyst, Ni (measured in NiO) in the active component accounts for 0.2-5.0% of the total weight of the catalyst, the auxiliary agent accounts for 0.05-1.0% of the total weight of the catalyst, and the balance consists of the carrier. According to the invention, the catalyst prepared by the formula and the method disclosed in the invention can carry out hydrogenation on saturated monoolefine while the catalyst is used for carrying out hydrodesulfurization on oils, can be suitable for technical requirements of heavy oriention, changeable sulphur content, and high air speed of hydrogenation liquid for pyrolysis gasoline two-stage hydrogenated raw materials, and simultaneously, the catalyst has the advantages of low activation temperature and low loss of aromatics in the hydrogenation process.

The disclosed agent access method comprises: a network control device set between the initial end and objective end receives access request to transform protocol and modify the original address into self network address, and sends the access request to the accessed end. This invention ensures the interconnection between two ends efficiently.

The invention relates to an interplant method of camellia oleifera and torreya grandis young growth. The interplant method of the camellia oleifera and the torreya grandis young growth is characterized in that peanut and upland rice are interplanted at intervals between the camellia oleifera and the torreya grandis young growth, and the peanut and the upland rice interchange positions in the nest year. The interplant method of the camellia oleifera and the torreya grandis young growth has the advantages that the upland rice provides shade for the camellia oleifera or the torreya grandis so that expense of sheltering nets is reduced, interplanted the upland rice and the peanut can store water and keep moisture for the torreya grandis young growth so as to avoid water and soil loss, the peanut provides nitrogen needed during in the early stage of production of the camellia oleifera by means of a biological nitrogen fixation function of the nodule bacteria so that nitrogenous fertilizer is saved, intercropping and crop rotation of the interplanted crop can not only avoid damage, caused by continuous cropping, to the soil but also have functions of restraining occurrence and spread of plant diseases and insect pests and isolation, tend is replaced with cultivation, weeds are restrained, management cost of the camellia oleifera or the torreya grandis is reduced, the utilization rate and the copping index of the forest land are improved and economic benefits are increased.

The present invention relates to an electrode structure of an IBC solar cell. The electrode structure of the IBC solar cell is characterized in that inter-digital interlaced positive / negative grid line electrodes are arranged on the backside of the solar cell, the positive / negative grid line electrodes are insulated in a laser etching or insulation paste manner, and all the positive / negative grid line electrodes on the backside are gathered on the strip-like or block-like positive / negative contact electrodes respectively; the positive / negative contact electrodes are connected via conductive solder strips, and the conductive solder strips and the block-like positive / negative grid line electrodes are isolated and insulated via the insulation paste film. The positive / negative contact electrodes of the two solar cells can be in a straight line by rotating the adjacent solar cells 180 degrees and then placing the adjacent solar cells, and the IBC solar cells can be soldered and connected via the routine linear conductive solder strips, so that the electrode structure of the IBC solar cell is simple, convenient, safe, reliable, beautiful and practical and is suitable for the industrialization application, the photoelectric conversion efficiency of the large-size cells is improved, and the development from the IBC cell to the cell of 6 inches or a larger size is realized.

The invention discloses a combined blowing and drawing kitchen ventilator, which comprises a kitchen ventilator shell and a cooking bench air supplement device. An inner shell is arranged in the kitchen ventilator shell at an interval; a smoke collecting cavity is arranged on an air drawing port of the inner shell; an oil filter screen is arranged in the inner shell on the top part of the smoke collecting cavity; the bottom face and the horizontal face of an oil collecting groove of the oil filter screen are arranged in an inclined way; an oil cup is slidably inserted into one groove on the side face of the smoke collecting cavity; an air outlet is formed in the top part of the kitchen ventilator shell; a smoke exhaust fan is arranged in the kitchen ventilator shell; and air outlet of the smoke exhaust fan communicates with an inlet of an air outlet pipeline penetrating through the air outlet; the cooking bench air supplement device comprises a still pressure box for supporting a gas stove; air curtain vertical pipes are fixed to the left side and the right side of the still pressure box along a vertical direction; the two air curtain vertical pipes respectively communicate with the still pressure box; and a plurality of side clearance air outlets are formed on the top parts of the air curtain vertical pipes. The device can be used for quickly discharging pollutants to outdoor.

The invention relates to a radio frequency power supply, in particular to a large-power full solid-state radio frequency power supply based on an MOS-FET amplifier, which comprises a signal source, a control circuit, a modulation switch, a wave filter, a primary power amplification circuit, a secondary power amplification power, a synthetic wave filter, a power detector and other modules; and the radio frequency power supply has the advantages that the radio frequency power supply has long service life, long continuous working time, stable power frequency and power and simple operation, does not need preheating, reduces the labor intensity of engineering operators, has high efficiency of the whole machine and also has the functions of standing wave protection and overheating protection.

Disclosed is a building material cutting device with a dust removal effect. The building material cutting device with the dust removal effect comprises a bearing plate. A working box is fixedly connected with the top of the bearing plate, a cut material opening is formed in the top of the working box, and separating plates are fixedly connected with the two sides of the top of the inner wall of the working box. First air cylinders are fixedly connected with the tops of the face-to-face sides of the separating plates, clamping blocks are fixedly connected with the output ends of the first air cylinders, a screen plate is fixedly connected with the bottoms of the face-to-face sides of the separating plates, and inclined plates are fixedly connected with the bottoms of the separating plates. A waste material collecting box is arranged at the bottom of the inner wall of the working box. According to the building material cutting device with the dust removal effect, due to the fact that a controller, the working box, the cut material opening, the first air cylinders, the clamping blocks, the screen plate, the waste material collecting box, dust hoods, dust suction pipes, second connecting pipes, an exhaust fan, a first connecting pipe, an air outlet pipe, a purifying box and an exhaust pipe are arranged, the effect that particle dust and large-particle waste materials can be processed at the same time is achieved.

The invention provides a membrane switch and a manufacturing method thereof, relating to the field of electronic switches. The membrane switch comprises an upper membrane, an upper conducting layer, a lower basic layer, a lower conducting layer, an isolating layer and a glue layer, wherein the upper conducting layer is printed on the upper membrane; the lower conducting layer is printed on the lower basic layer; the isolating layer is placed between the upper conducting layer and the lower conducting layer and is a UV (Ultraviolet) gasket layer; cushion rings of the UV gasket layer are distributed on the peripheries of key locations of the upper conducting layer and the lower conducting layer; and the upper conducting layer and the lower conducting layer are adhered into an integer through the glue layer on the periphery of a UV gasket layer and the periphery of the membrane switch. In the membrane switch and the manufacturing method thereof, provided by the invention, the UV oil printing cushion rings are adopted to play isolation roles and replace the traditional interlayer, thereby the advantages of thinner and simpler structure, higher production efficiency and longer service life are achieved; and the screen printing glue is adopted to replace the traditional double-faced adhesive tape for adhesion, thereby the advantages of better operation convenience, high production efficiency and lower cost are achieved.

The invention relates to a hammer head for a two-fluid duplex metal composite hammer crusher and a manufacturing method thereof. By the hammer crusher, the technical problems of low combination strength of a hammer handle and a hammer head and high cost in the conventional duplex metal composite hammer head are solved. The duplex metal composite hammer head consists of a head part, a hammer handle and a swallowtail-shaped partition board positioned between the head part and the hammer handle. The manufacturing method comprises the following steps of: manufacturing a cavity of the hammer head; performing acid washing and drying on the swallowtail-shaped partition board, and fixing the swallowtail-shaped partition board in the cavity; and pouring molten metal of the head part and molten metal of the hammer handle simultaneously, and cooling to obtain the hammer head for the two-fluid duplex metal composite hammer crusher. According to the hammer head, the head part and the hammer handle are combined in a metallurgy mode, so that the hammer is high in abrasive resistance, long in service life and reliable in crack resistance, can crush a large amount of stuff and can be used for the hammer crusher.

The invention relates to a direct current (DC) bus voltage-sampling circuit of a servo system converting a voltage to a frequency, comprising a resistance-sampling divider circuit, a V / F converting circuit and an isolation optocoupler circuit. The resistance-sampling divider circuit is connected with a DC bus to acquire an input voltage Vin which is about 10V on the bus by voltage division when the bus is in full voltage; the input end of the V / F converting circuit is connected with the resistance-sampling divider circuit and converts an input voltage value into a pulse frequency signal in a direct frequency and voltage proportion; the primary positive end of the isolation optocoupler circuit is connected with the output end of the V / F converting circuit; the secondary end of the isolation optocoupler circuit is connected with the I / O of a DSP; and pulse signals with the same frequency are input to the DSP to acquire corresponding digital quantities. The invention has the advantages of good input / output linearity and high reliability and accuracy.

The invention relates to an EPDM (Ethylene-Propylene-Diene Monomer) / polypropylene thermoplastic elastomer and a preparation process thereof. The EPDM / polypropylene thermoplastic elastomer is characterized by comprising the following components in parts by weight: 1065-1250 parts of PP (Poly Propylene ) raw material, 150-550 parts of plasticized rubber powder, 60-80 parts of naphthenic oil, 80-180 parts of POE (Poly Olefin Elastomer), 100-150 parts of 250-mesh talcum powder, 3-7 parts of antioxidant 1010, 10-30 parts of PE (Poly Ethylene) wax, 15-45 parts of butyl methacrylate and 4.5-15 parts of DCP, wherein the plasticized rubber powder is obtained from the waste ethylene -propylene-diene monomer powder through preprocessing, and a formula for the preprocessing includes 1500 parts by weight of 80-mesh waste ethylene -propylene-diene monomer powder, 100-200 parts by weight of solid coal tar, 5-10 parts by weight of activator, 20-40 parts by weight of surfactant and 20-40 parts by weight of 1250-mesh talcum powder. The thermoplastic elastomer is wide in hardness change range, high in strength, and remarkably improved in physical and mechanical properties.

The invention discloses a method for preparing small-particle-size cerium-activated yttrium aluminum garnet (YAG) florescent powder. According to the method, first, in fused salt, a wrapping structure of nanometer yttrium oxide (cerium oxide) @ aluminum oxide particles is obtained through controlled synthesis, then the aggregate of small-particle YAG florescent powder particles is generated through reaction in high-temperature fused salt, and finally the small-particle-size YAG: Ce florescent powder is obtained through weak ball milling. It is avoided that in the reaction process, the aluminum oxide particles and intermediate-phase particles abnormally grow, and while the high crystallinity of the particles is kept, final YAG is effectively controlled; the particle size of the Ce florescent powder has important significance for improving light-color quality of white-light LEDs, lowering the complexity of a white-light LED packaging technology and increasing the yield.

The invention relates to a soil conditioner suitable for desertification control and application thereof in desertification control. The soil conditioner is combination of multiple raw materials, including volcanic ash, gamma-polyglutamic acid hydrogel and biofloc, wherein the biofloc comprises rotten straw powder, a first microbial inoculant, nitrobacteria and denitrifying bacteria; the first microbial inoculant comprises Bacillus subtilis and selective actinomycetes; the first microbial inoculant accounts for 5-25 wt% of the rotten straw powder; and the amount of nitrobacteria and denitrifying bacteria is greater than or equal to 80ml / kg rotten straw powder. The soil conditioner has excellent moisture retention and water storage effects, is capable of enhancing the organic matter content in soil, regulating the pH value of the soil and promoting the release of available nitrogen, phosphorus and potassium, and creates a favorable soil physical and nutritional environment for plant growth. Meanwhile, the conditioner has the advantages of simple formula, simple preparation process and lower cost.

The invention relates to a magnetic reselection device, in particular to an electromagnetically-focused concentration machine for concentrating magnetite, which comprises an ore supply hopper, an ore supply pipe, a tailing overflowing groove, a separation bucket, excitation coils, a water supply package, an ore concentrate funnel and an ore concentrate discharge valve. The separation bucket is internally provided with a plurality of layers of excitation coil with a waterproof ware-resistant protection layer from top to bottom by a bracket, the excitation coil at the upmost layer supplies a constant direct current, other excitation coils are grouped and sequentially switched on with the switching-on time and currents automatically or manually adjusted according to the overflowing density and the separation conditions, the upper part of the separation bucket is provided with a tailing overflowing density sensor, and an ore concentration density sensor is arranged between the ore concentrate funnel and the ore concentrate discharge valve at the bottom of the separation bucket. In machine, the utilization rate of the magnetic field is greatly improved, and lower-cost iron materials can be adopted for the separation bucket. By the aid of the control of the ore concentrate discharge valve, the circulating time adjustment of the separation magnetic field and the automatic control of the field strength, the aims of decreasing the manufacture cost of the device, saving the energy and ensuring the optimal separation effect are achieved.

The invention relates to a shielded laminated variable frequency controller of a lift door, solving the problems of no shielded casing, easy damage, inconvenient debugging and maintenance, and the like of the prior lift door controller. The shielded laminated variable frequency controller comprises a casing, a power driving plate, a main control circuit board, a man-machine interactive circuit board and cooling ribs, wherein the casing is provided with an external interface socket, and the power driving plate, the main control circuit board, the man-machine interactive circuit board and the cooling ribs are assembled in the casing. The shielded laminated variable frequency controller is characterized in that the casing is a shielded casing and forms an integral shielded space together withthe cooling ribs arranged on the bottom of the casing; the power driving plate is fixed on the upper surfaces of the cooling ribs by insulating struts; the cooling ribs are in direct contact with high-power heating elements on the power driving plate; the main control circuit board is connected with the power driving plate by the insulating struts and connecting wires; the man-machine interactivecircuit board is fixedly assembled on the upper surface of the main control circuit board; and the external interface socket arranged on the shielded casing is respectively connected with the main control circuit board and the power driving plate by the connecting wires. The invention has the advantages of reasonable integral structure, shielded function of the casing, obviously improved protection grade and convenient installation and maintenance.

Disclosed are an LDMOS (lateral double-diffused metal oxide semiconductor) transistor structure and a formation method thereof. The formation method includes forming a deep groove in a substrate, forming a liner layer on the side wall of the deep groove, and filling a semiconductor layer in the deep groove; doping the substrate to form a drift area, and enabling the liner layer and the semiconductor layer within the drift area; forming a first trap and a second trap respectively in the substrate on two sides of the drift area, connecting the first trap and the second trap with the drift area; forming a first grid structure on the drift area and the first trap; forming a second grid structure on the drift area and the second trap; forming a common drain in the semiconductor layer exposed by the first grid structure and the second grid structure; forming a first source in the first trap exposed by the first grid structure, and forming a second source in the second trap exposed by the second grid structure. By the LDMOS transistor structure, breakdown voltage of the LDMOS transistor can be increased without increasing the area of the transistor.

The invention discloses a device for improving the response stability of a surface acoustic wave gas sensor, wherein a metal cover is placed on a base plate of the surface acoustic wave gas sensor to form an gas chamber, the width of the metal cover is smaller than that of the base plate, and the hollow part of the metal cover is wider than an electrode, and the electrode and a sensitive film are ensured to be arranged in the hollow part of the metal gas chamber, therefore, the base plate can play the role of isolation when external gas is pumped in, and only can the sensitive film on the base plate adsorb gas, and adhesive on the back of the base plate can not contact with gas, thereby preventing the adhesive absorbing gas from generating stress owing to the swelling effect, and further solving the unstable response of the surface acoustic wave gas sensor caused by the stress. In addition, the metal gas chamber further has an electromagnetic shielding function, which can avoid the mutual interference among a plurality of the surface acoustic wave gas sensors. The scheme of the invention realizes the minimization of the gas chamber, and is beneficial to the shortening of the response time of the sensor.

The invention provides a high-efficiency kit which comprises a kit lid and a kit body. The kit lid is located on the kit body. A supporting plate, a corrosion resisting plate, a clamping plate and a cover plate are arranged in the kit body. The supporting plate is located at the bottom of the inner side of the kit body. A plurality of tube grooves are formed in the supporting plate. The corrosion resisting plate is fixed to the supporting plate. A plurality of through holes corresponding to the positions of the tube grooves are formed in the corrosion resisting plate. The hole diameter of the through holes is identical to the diameter of the tube grooves. The clamping plate is located above the corrosion resisting plate. The high-efficiency kit is provided with a clamping mechanism. Elastic pieces are arranged in the clamping mechanism. The clamping mechanism can contain reagent tubes of different specifications through contraction of the elastic pieces, the application range is wide, and the space is saved. The cover plate can achieve the function of isolating outside pollution while fixing the reagent tubes.

The invention discloses a Micro-LED chip, a preparation method thereof and a display device, the Micro-LED chip comprises a driving backboard and a light-emitting chip, both the driving backboard andthe light-emitting chip comprise electrodes, a groove is formed above the electrode of the driving backboard, and the bottom of the groove is exposed to the electrode of the driving backboard; the groove is filled with metal, and the electrode of the driving backboard is connected with the electrode of the light-emitting chip through the metal in the groove. In a way of printing liquid metal, theelectrode of the light-emitting chip is connected with the electrode of the driving backboard through the cured liquid metal; compared with direct welding of the electrode of the driving backboard andthe electrode of the light-emitting chip, due to the fact that the contact performance of connection of the cured liquid metal is good, the contact performance between the electrodes can be effectively improved, and the reliability of connection between the electrodes is improved.

The invention discloses an optical module. The optical module comprises a circuit board; a light emitting assembly which is electrically connected with the circuit board and is used for emitting a light signal; a light receiving assembly which is used for receiving a light signal from the outside of the light module; a flexible board which is used for connecting the light receiving assembly and the circuit board; the light receiving assembly comprises a housing; an optical receiving device which is arranged in the shell and is used for receiving an optical signal of an external optical fiber;and a trans-impedance amplifier which is arranged on the surface of the flexible board inserted into the shell, is connected with the light receiving device, is electrically connected with the circuitboard through the flexible board, and is used for transmitting the amplified electric signal to the circuit board. According to the optical module provided by the invention, the optical receiving assembly is integrated on the flexible board; the optical receiving assembly is connected to the circuit board through the flexible board, chips of the transmitting end and the receiving end are prevented from being integrated on the circuit board, the distance between the transmitting chip and the receiving chip is spatially separated through the external flexible board, and the problem of circuit crosstalk is fundamentally solved by means of spatial isolation, position isolation and the like.

The invention relates to a whole-core conveyer belt tooth-shaped joint cutter. At present, a conveyer belt is mostly connected by using a metal buckle so as to easily produce vibration and tear, obtain short service life and affect the production and safety of an enterprise. The invention aims to produce the whole-core conveyer belt tooth-shaped joint cutter. The structure of the cutter consists of a movable rail frame assembly (21) arranged on a base (23) and a movable tool rest assembly (15) arranged on the rail frame assembly (21) and is a detachable split connection structure. The cutter has the advantage that the cutter is widely applied to the industries of mines, power plants, cement plants, coking plants, docks and harbors and the like which use whole-core conveyer belts. The cutter improves the overall performance of whole-core conveyer belt tooth-shaped joint cutting operation, and avoids the previous problems of poor centering property, low cutting efficiency and poor whole-core conveyer belt connecting quality. The cutter has the advantages of multi-station and multi-blade precise cutting, split design, convenience for carrying, suitability for field operation, and no strict requirement for operator skills.

The invention relates to an exterior wall fireproof composite board with a built-in keel. The exterior wall fireproof composite board successively comprises a backboard layer, a heat-insulation layer and a surface decoration layer outwardly from an exterior wall, the keel is embedded in the heat-insulation layer, and the backboard layer, the heat-insulation layer and the surface decoration layer are bonded with each other to form the composite board. The exterior wall fireproof composite board also comprises wall anchoring members for fixing and connecting the composite board to the wall. The keel is an aluminum alloy keel of a structure shaped like a Chinese character 'jing', 'tian', 'wang', or 'shi'. The exterior wall fireproof composite board has the advantages that through building the aluminum alloy keel in the heat-insulation layer, wind load anti-compression performance of the whole composite board is largely enhanced, and collapse and deformation of the whole composite board are effectively prevented; and service lifetime of exterior wall heat-insulation materials is effectively prolonged, and heat-insulation lifetime of the exterior wall can be prolonged to be over 10-15 years.

The present invention relates to the technical field of materials, and provides a heat-conduction filling material for the heat dissipation of electronic components, wherein the heat-conduction filling material comprises, by mass, 14-20% of a silicon rubber, 20-40% of a graphene / carbon nano-tube composite material, 30-60% of a metal oxide, 0.1-1% of a coupling agent, and 1-2% of a liquid state metal. According to the present invention, the graphene / carbon nano-tube composite material is selected as the raw material and has the three-dimensional network structure, and through the synergistic effect between the graphene and the carbon nano-tubes, the excellent performances are provided compared to the single use of any one material, wherein the excellent performances comprise good isotropic thermal conductivity, good isotropic electric conductivity, good three-dimensional space micro-pore network and the like; and the limitation problem of the thermal conduction direction due to the single use of the two materials such as graphene and carbon nano-tubes in the prior art is solved.

The invention discloses a preparation method of an interface strong metallurgical bonding metal layered composite material, and belongs to the technical field of metal layered composite material preparation. The method comprises the steps of heating to increase the temperature of a whole titanium / steel layered pre-composite blank to 705 to 875 DEG C, and conducting heat preservation; increasing temperature and heating the surface of a titanium material and the surface of a steel material of the titanium / steel layered pre-composite blank, respectively heating the areas, which are 0.5 to 0.8 time of the thickness of the titanium material and the thickness of the steel material, of the surface of the titanium material and the surface of the steel material towards the direction of a compositeinterface to 935 to 1350 DEG C, keeping the temperature of the composite interface at 705 to 875 DEG C, and then conducting heat preservation; and conducting 1 to 15 passes of hot rolling compoundingon the heated titanium / steel layered pre-composite blank, then conducting air cooling to the room temperature, and obtaining a titanium / steel layered composite plate strip. The method can be used forpreparing the titanium / steel layered composite plate strip with high interface bonding strength at low cost and high efficiency.

The invention discloses a method for preparing a self-adhesion rubber asphalt waterproof roll tearing-free film, and relates to a method for preparing a building thin film. The method comprises the following steps of: adding 100 parts of anacardol (98 percent), 70-95 parts of formalin (37 percent) and 2,775-4,000 parts of polyvinyl alcohol aqueous solution (5 percent) into a reactor; then adding the residual 95-120 parts of formalin (37 percent) for a continuous reaction to obtain film stoste; and neutralizing the film stoste until the pH is 7.0, diluting the film stoste until the concentration of the film stoste is 5 percent, coating the film stoste on the surface of the just formed self-adhesion rubber asphalt waterproof roll by a roller coating method, and under the common action of the temperature of the roll and sweeping of a fan, quickly drying the film stoste on the surface of the roll to form a film. The film in the invention is self-dissolved and decomposed into alkaline slurry of concrete, and the bonding strength between the solidified concrete and the roll cannot be influenced.

The invention relates to the field of scale-inhibiting and descaling, and provides an electromagnetic scale-inhibiting and descaling device. The electromagnetic scale-inhibiting and descaling device comprises an electromagnetic emission assembly and a magnetic field receiving assembly; and the electromagnetic emission assembly comprises an induction power supply and an electromagnetic induction coil, the induction power supply introduces an alternating current into the electromagnetic induction coil, the electromagnetic induction coil is wound around the magnetic field receiving assembly, andthe electromagnetic induction coil generates an alternating magnetic field with the magnetic field strength being 5000-50000 Gaussian. The invention further provides an evaporating system, which comprises the electromagnetic scale-inhibiting and descaling device. According to the electromagnetic scale-inhibiting and descaling device and the evaporating system, in the equipment operation process, scale-inhibiting and descaling can be achieved, the magnetism gathering effect is good, the scale-inhibiting and descaling ability is high, energy is fully utilized, system automatic monitoring is achieved, and safety performance is high.

The invention provides a touch screen virtual keyboard auxiliary device and method enabling users to have comfortable touch feeling without affecting intrinsic touch experience of a touch screen. The device is arranged on the surface of the touch screen and comprises a bag-shaped keyboard and a fixing device. The bag-shaped keyboard covers a touch screen virtual board, and a bag body is opposite to corresponding virtual keys. The fixing device is attached to the device where the touch screen is arranged and has the effect of fixing the bag-shaped keyboard. The device is low in cost, simple in process, light in shape and structure, comfortable in touch and smooth in operation, effectively overcomes the shortcoming that the touch screen virtual keyboard is low in input efficiency, keeps the intrinsic touch experience and avoids troubles of an external independent keyboard.

The invention discloses a method for preparing a copper-chromium infiltration contact material through spark plasma sintering. The method comprises the steps of step 1, pouring chromium powder into a graphite mould, reducing the powder, putting the reduced powder into a plasma sintering furnace, carrying out vacuum pumping and pressurization, introducing a pulse direct current, increasing the temperature to 1050 to 1380 DEG C, maintaining the temperature for 2.5 to 5 min, and cooling along with the furnace; step 2, taking a copper block, polishing, carrying out ultrasonic cleaning, drying, carrying out laser radiation and scanning through laser, and carrying out plasma treatment to obtain a copper infiltration block; step 3, putting a chromium skeleton into a graphite boat, putting the copper infiltration block on the chromium skeleton, filling the surrounding places with corundum powder, putting the graphite boat into a high-temperature sintering furnace with the protective gas atmosphere, increasing the temperature to 1150 to 1300 DEG C, and maintaining the temperature for 40 to 60 min to obtain a copper-chromium sintered body; and step 4, carrying out vacuum pumping and hot pressing on the copper-chromium sintered body under the conditions that the pressure is 50 to 100 MPa and the temperature is 800 to 850 DEG C, and cooling to the room temperature to obtain the copper-chromium contact material. The production method has the advantage that the production cycle is shortened.