47results about How to "Controllable scale" patented technology

The invention provides a kind of hot-rolled double-sided enamel-used nickelclad, the chemical components of which is: C 0.02%-0.06%, Si <=0.50%, Mn 0.15%-0.40, P <=0.15%, S <=0.006%, N<=0.003%, Ti 0.08%-0.20%, Als 0.005%-0.055%, Ti / C 2.2-5,unavoidable impurities and Fe as balance. The architecture of the nickelclad is ferrite with grain diameter = 2 mum-20 mum under hot rolling conditions, and TiC particles (diameter < 20nm is uniformly distinguished in the architecture. V 0.015%-0.060% and / or Cr 0.05%-0.20% can also be added. The production method of the clad is: producing unburnt earthenware with continuous cast method, heating to 1180-1260DEG C, descaling with high-handed water, rough rolling, finish rolling for 5-7 passes at 1100-960 DEG C and finally at 920DEG C-840DEG C, continuously cooling to 450- 630DEG C at a speed of >=30DEG C / S in 0-7S, and coiling. The nickelclad has the advantages of good performance and high strength, and can meet the requirement of large scaled engineering fembers.

The invention discloses a novel vertical tube moving bed continuous pyrolysis apparatus for biomass. The apparatus mainly comprises a combustion heating furnace, a pyrolysis heat supply flue, a vertical tube pyrolysis moving bed, a coke air-cooling pipe, a rotary feed valve, a rotary discharge valve, a discharging packing auger, etc. According to the invention, high temperature flue gas is used to scour rows of pyrolysis vertical tubes in the moving bed to reinforce the effect of heat transfer from an external heat source to pyrolysis equipment, and biomass raw materials successively undergo thermal decomposition in the pyrolysis tubes with a great length-diameter ratio; heat released in cooling of coke is utilized for preheating of heating air, which enables energy to be fully utilized; and through adjustment by the rotary feed valve and the rotary discharge valve and gravity of materials, continuous production in the process of pyrolysis is realized.

The invention relates to a fireman individual-soldier system on the basis of a wireless Mesh network framework. The system consists of a wireless monitoring mainframe, a plurality of wireless individual-soldier sub-machines and a plurality of wireless repeaters, wherein the wireless monitoring mainframe consists of a monitoring module and a wireless center node module; and each wireless individual-soldier sub-machine consists of a central processing unit module, a positioning module, a vital sign detection module, a distress call module, an environment condition detection module, a carried equipment detection module and a wireless terminal node module. When the fireman individual-soldier system is applied particularly, firemen wear the wireless individual-soldier sub-machines to enter a fire site or other accident sites and a chief officer monitors information such as postures, motion tracks, vital signs, environment conditions, carried equipment conditions and the like through the wireless monitoring mainframe, so that the intelligence support of a command decision is provided for the chief officer in time and a scientific basis can also be provided for daily tactical training. By the fireman individual-soldier system, the modernization, automation and intellectualization levels of a fire command are improved and the battle damage rate of the firemen can also be effectively reduced.

A preparation method for a Cu-based hydrogenation catalyst comprises the following steps: dissolving soluble copper salt into water, then adding a carrier into the solution, and uniformly loading a copper precursor on the surface of the carrier to obtain a precursor sample; mixing the precursor sample and ethanol to form a suspending liquid, coating the suspending liquid on the surface of a glass sheet, impulsing polyisocyanate into an MLD reaction cavity, then impulsing an M precursor to be subjected to monomolecular layer reaction on the sample surface in sequence to obtain a hybrid membrane coated copper precursor compound; conducting heat treatment on the compound in air to obtain a nanometer CuO-MOx compound, and then conducting reduction in the reducing atmosphere to obtain the Cu-MOx interface catalyst. The preparation method has the advantage that the Cu-MOx interface structure can be regulated and controlled.

The invention discloses a continuous biomass pyrolytic carbon gas-oil poly-generation system. The continuous biomass pyrolytic carbon gas-oil poly-generation system comprises a pyrolysis unit, a condensation unit, a purifying unit, a gas storage unit and a heating unit, wherein the pyrolysis unit is connected with the condensation unit and the heating unit; the gas storage unit is connected with the purifying unit and the heating unit respectively; the condensation unit is connected with a gas storage unit pipeline by the purifying unit; high-temperature smoke gas is generated by the heating unit; the pyrolysis unit performs thermal conversion from biomass into a carbon gas oil product by heat energy generated by high-speed scouring of high-temperature smoke gas and coke is separately stored; bio-oil and gas are separated from carbon gas oil by the condensation unit; impurities in the fuel gas are removed by the purifying unit; and the gas subjected to the impurity removal is stored by the gas storage unit. With the adoption of the continuous biomass pyrolytic carbon gas-oil poly-generation system, targets of continuously producing biogas, a biological coke and bio-oil are realized, so that the product quality is stable, and the application prospect is wide.

The invention discloses a method for preparing a metal-oxide compound nano catalyst by molecular layer deposition. The method comprises the following steps: placing a sample loaded with a metal A precursor into a reaction cavity of molecular layer deposition equipment; feeding a precursor of B, multivariate isocyanate and polyamine into the cavity in sequence to generate layer-by-layer monomolecular layer reaction, and covering a compound of the precursor of A by a B-containing organic-inorganic compound membrane; growing layer by layer, changing the cycle number to adjust the thickness of a B-polyurea hybrid membrane; and removing an organic part of the compound by thermal treatment, reducing to realize high-dispersion mixing of the metal A and nano particles of an oxide B, and forming an interface with a large number of metals A and oxides B. The obtained metal-oxide interface controllable material is higher in performance in catalytic hydrogenation, catalytic oxidation and the like. The method is easy to operate, and the interface site can be adjusted according to the deposition cycle number.

The invention discloses a preparation method of a bismuth titanate-titanium oxide heterojunction nano-material and a method for preparing a membrane electrode by utilizing the bismuth titanate-titanium oxide heterojunction nano-material so as to perform photoelectrocatalytic treatment on bacteria in ballast water. By adopting the process disclosed by the invention to prepare the bismuth titanate-titanium oxide heterojunction nano-material, the synthesis temperature is low and the preparation process is simple; by applying the bismuth titanate-titanium oxide heterojunction nano-material to prepare the membrane electrode, the preparation method is simple, the membrane electrode has relatively good stability, and the electrode can be reused; by utilizing a photoelectrocatalytic technology to apply the membrane electrode in the field of sterilization of the ballast water, equipment is simple, the sterilization time is short, the efficiency is high, the required externally applied voltage is small, and the application is favorable for ballast operation of a ship; furthermore, the sterilization treatment energy consumption is low, the process is simple, the scale is controllable, and the secondary pollution is avoided.

The invention relates to a submarine landslide evolution process simulating system and experimental method based on transparent soil and a rotating water tank, and belongs to the technical fields of marine geological disasters and geotechnical engineering experiments. The simulating system comprises a rotating water tank system, a transparent soil simulating system and a control and data collection system. The rotating water tank system sets different speeds for a sample by means of a control motor, and a closed circular ring structure of a U-shaped section rotary drum groove satisfies that the sliding distance is not limited; the transparent soil simulating system prepares a transparent sample, with a tracer coloring agent, and fluid environment whose physical mechanical property is the same with that of a real submarine soil layer, so that the internal, external and water-soil interface is visualized in a 3D way in the whole sample evolution process; and the control and data collection system realizes quantitative monitoring and data extraction of the evolution process by means of 3D laser slicing and digital image collection. The provided system is controllable in the scale, visualized in the evolution process, capable of measuring image data, and can solve the problems that a long-distance evolution experiment is hard to carry out, data acquisition is difficult, and a monitoring picture is not clear.

The present invention discloses a wireless humiture intelligent sensor which forms a sensing system together with an upper machine. The invention is characterized in that the sensor comprises a sensor module, a micro-processor module, a wireless receiving and transmitting module, a serial port communication module and a power module. The core part is the wireless receiving and transmitting module which comprises the following elements: a ZigBee wireless module main chip MC13192, a 16.000MHz crystal oscillator, a radio frequency unit RF transmitting and receiving circuit and a 2.4G PCB double pole antenna. The invention has the following advantages: 1) wireless property; 2) flexibility; 3) low power consumption; and 4) usability.

The invention provides a preparation method of bamboo joint structure Mn2O3. According to the method, at first, rod-metal organic framework material Mn-MOF precursors are prepared by a guide agent assisting solvent volatilization method; then, in the air environment, the Mn-MOF precursors are calcined; the calcining temperature is controlled to be 400 to 650 DEG C; the time is 2 to 4h; finally, the materials are cooled to the room temperature along with the furnace temperature; the bamboo joint structure Mn2O3 nanometer structure materials can be obtained. The method provided by the invention has the advantages that the operation is simple; the process cost is low; the appearance is regular; the product stability is high, and the like. The industrial production is facilitated. The bamboo joint structure Mn2O3 nanometer structure material obtained by the method has the advantages of good conductivity and great specific surface area; the electrode resistance can be favorably reduced; the materials can be used for supercapacitor electrode materials.

The invention relates to the technical field of metallurgy and in particular relates to a device for preparing metal powder by inert gas shielded plasmas. The technical scheme is as follows: a plasma generator is connected with a reaction control chamber, wherein a charging ejector is communicated above the reaction control chamber; a cooling collecting chamber is communicated below the reaction control chamber; the charging ejector, the reaction control chamber and the cooling collecting chamber are connected with an inert gas storage bottle, respectively; and a gas escape tube is further arranged on the cooling collecting chamber. The device for preparing metal powder by inert gas shielded plasmas can be used for preparing various metallic simple substances with a melting point of 300 DEG C to 15000 DEG C, alloy crystals, amorphous particles and powder, so that the preparation is free of purity and oxidative deterioration influences needed by the smelting points and the activities of the target metals, controllable in a large-scale manner and capable of realizing the laboratory production and large-scale industrial production. Moreover, the device is low in energy consumption, simple in process, and capable of repeatedly utilizing the inert gases and centrifugal axle cooling liquids in the gas chamber without pollution.

The invention relates to the technical field of preparation of transition metal carbide powder materials, in particular to a method for in-situ preparation of ZrC, HfC or VC powder in situ through molten salt disproportionation reaction. The method comprises directly forming a raw material mixture according to the stoichiometric ratio, with the structural formula of transition metal carbide beingMC, M being a transition metal element zirconium or hafnium or vanadium, and C being a carbon element; reacting the raw material mixture in molten salt in an inert atmosphere, and cooling after the reaction is finished to obtain a product mixture; and removing the molten salt in the product mixture to obtain ZrC, HfC or VC powder. The method can solve one or more of the problems of high ZrC, HfC or VC powder synthesis temperatures, complex preparation processes and equipment, high costs, uncontrollable morphology and sizes and the like in the prior art, and has the advantages of rapidness, high efficiency, energy saving, environmental protection, a low cost, easy realization of large-scale production and the like.

A method for preparing a conducting polymer aqueous dispersion by a conducting polymer solid particularly adopts a process flow which orderly comprises high speed shearing dispersing treatment, high pressure homogenization treatment, and high speed emulsification dispersing treatment of conducting polymer powder. The invention applies a physical dispersion method of solid particles to the preparation of nanometer conducting polymer aqueous dispersion, solves the processing problem due to the general insolubility and infusibility of conducting polymer, overcomes the requirements for processing performance such as solubility and the like of conducting polymer by industrial production, and overcomes the defects of current conducting polymer solvent dispersion systems in transport, storage, and processing processes. The method has a simple method, simple equipment operations, low requirements for production workshop conditions, a short production period, less manpower consumption , and greatly reduced cost. Also since the preparation means of the conducting polymer solid is not limited, chemical oxidation polymerization, solid state polymerization, coupling polymerization and the like can be used.

The invention belongs to the field of biocoke activating devices and in particular to a physical and chemical combined activating device for biocoke. The physical and chemical combined activating device for biocoke comprises an activating chamber and an activator premixing chamber. The activating chamber is of a hollow structure, a feeder is arranged on the top of the activating chamber, and a heat supply flue and an activator channel are arranged in the bottom; the activator premixing chamber is arranged in the hollow structure, the outer wall of the activator premixing chamber is in a cylindrical shape provided with a plurality of pores, and a spiral fin is also arranged on the cylindrical outer wall, so that biocoke supplied to the hollow structure under self gravity and rotary driving of the activator premixing chamber moves from top to bottom so as to be in full contact with high temperature flue gas containing a physical activator and a chemical activator, so that a whole activating process is finished. The device provided by the invention can further realize physical and chemical activation of the biocoke and has the advantages of being stable to operate, wide in adaptability of raw materials and easy to control scale.

The invention provides a method for producing hybrid seeds by use of pepper genic male sterile line and restorer line. The method comprises the following steps: 1, planting a pepper genic male sterile AB line and a restorer line in an area or a greenhouse where pepper plants are capable of overwintering cultivation respectively, taking sterile plants of the genic male AB line as female parent and taking the restorer line as male parent to perform hybridization so as to produce hybrid seeds; 2, pruning aerial parts of the sterile plants and the restorer line plants after the harvest of hybrid seeds in winter and then performing overwintering cultivation; 3, pruning and tidying dormant buds of the overwintering plants after the dormant buds sprout next year, taking the sterile plants as the female parent and taking the restorer line as the male parent to perform hybridization during florescence so as to produce hybrid seeds; and 4, repeating a step 2 and a step 3 three to four times. The method can continually harvest pepper hybrid seeds in a plurality of years after seeding once in a year, saves labor and time for hybrid seed production, is low in cost and long in heterosis-holding time, capable of guaranteeing the yield and quality of hybrid peppers and convenient for commercial application, and has important significance for popularizing the technology of utilizing pepper heterosis.

The invention discloses a continuous biomass pyrolytic carbon gas-oil poly-generation system. The continuous biomass pyrolytic carbon gas-oil poly-generation system comprises a pyrolysis unit, a condensation unit, a purifying unit, a gas storage unit and a heating unit, wherein the pyrolysis unit is connected with the condensation unit and the heating unit; the gas storage unit is connected with the purifying unit and the heating unit respectively; the condensation unit is connected with a gas storage unit pipeline by the purifying unit; high-temperature smoke gas is generated by the heating unit; the pyrolysis unit performs thermal conversion from biomass into a carbon gas oil product by heat energy generated by high-speed scouring of high-temperature smoke gas and coke is separately stored; bio-oil and gas are separated from carbon gas oil by the condensation unit; impurities in the fuel gas are removed by the purifying unit; and the gas subjected to the impurity removal is stored by the gas storage unit. With the adoption of the continuous biomass pyrolytic carbon gas-oil poly-generation system, targets of continuously producing biogas, a biological coke and bio-oil are realized, so that the product quality is stable, and the application prospect is wide.

The invention discloses a self-adaptive flow control system and application thereof to a high-temperature and high-salinity oil reservoir. The self-adaptive flow control system is composed of, by weight percentage, 0.1-0.4% of alkylolamides, 0.05-0.3% of glucoside surfactant, 0.01-0.1% of polyols and water as balance. According to application of the self-adaptive flow control system to the high-temperature and high-salinity oil reservoir, the properties of the high-temperature and high-salinity oil reservoir comprise that the temperature is 90-140 DEG C, the degree of mineralization of water is 3.0-22*10<4> mg / L, and the content of divalent ions is higher than 500 mg / L. With the content of water higher than 90% and an oil-water ratio of 1:1-1:9, the self-adaptive flow control system can for water-in-oil (W / O) emulsion or oil-in-water (O / W) emulsion of W / O and O / W mixed emulsion under shear induction, and the viscosity of the emulsion is 10 or more times as much as that of water in oilreservoir conditions to achieve automatic control of flow of displacement medium. The self-adaptive flow control system can significantly improve the recovery efficiency of the high-temperature and high-salinity oil reservoir, and is reliable in principle, outstanding in economic benefits and broad in application prospect.

The invention provides a method for preparing ramie special fertilizer from stockpile manure of sewage and sludge of a brewery. The method comprises the following steps: the sewage and sludge from the brewery is mixed with rape seed cakes according to the weight ration of between 1.8 and 5 to 1 to obtain the mixture; the C / N mass ratio and the initial water content of the mixture is adjusted to between 28 to 31 and 28 to 1 and between 58 and 62 percent respectively, the mixture after adjustment is put in plastic woven bags and sealed, and the plastic woven bags are piled in multiple layers for micro aerobic stockpile manure fermentation for 18 to 22 days; the stockpile manure after fermentation is dried at a temperature of less than or equal to 70 DEG C to obtain the brewery sewage and sludge stockpile manure with the water content of less than or equal to 10 percent; according to the weight ratio of 10 to 4-6 to 2-3 to 1-2, the brewery sewage and sludge stockpile manure, urea, calcium superphosphate and potassium chloride are mixed and evenly stirred to obtain the ramie special fertilizer. The method has the advantages of making the harmfulness reduction and the effective utilization of the brewery sewage and sludge, repeatedly using common plastic woven bags and having low cost.

The invention provides a kind of hot-rolled double-sided enamel-used nickelclad, the chemical components of which is: C 0.02%-0.06%, Si <=0.50%, Mn 0.15%-0.40, P <=0.15%, S <=0.006%, N<=0.003%, Ti 0.08%-0.20%, Als 0.005%-0.055%, Ti / C 2.2-5,unavoidable impurities and Fe as balance. The architecture of the nickelclad is ferrite with grain diameter = 2 mum-20 mum under hot rolling conditions, and TiC particles (diameter < 20nm is uniformly distinguished in the architecture. V 0.015%-0.060% and / or Cr 0.05%-0.20% can also be added. The production method of the clad is: producing unburnt earthenware with continuous cast method, heating to 1180-1260DEG C, descaling with high-handed water, rough rolling, finish rolling for 5-7 passes at 1100-960 DEG C and finally at 920DEG C-840DEG C, continuously cooling to 450- 630DEG C at a speed of >=30DEG C / S in 0-7S, and coiling. The nickelclad has the advantages of good performance and high strength, and can meet the requirement of large scaled engineering fembers.

The invention belongs to the field of road traffic design and provides a grade separation structure of an underground tunnel or an underwater tunnel. Opposite-direction lanes of a second road section are separated from each other. Respectively taking a first exit and entrance and a second exit and entrance, at two ends of the second road section, as starting points, a first ramp is arranged adjacent to a corresponding lane to the left of the first ramp lanes and a second ramp is arranged adjacent to a corresponding lane to the left of the second ramp lanes; after crossing over a first road section, the first ramp and the second ramp are connected to the first road section by corresponding arc ramps. Respectively taking a third exit and entrance and a fourth exit and entrance, at two ends of the first road section, as starting points, a third ramp is arranged adjacent to a corresponding lane to the left of the third ramp and a fourth ramp is arranged adjacent to a corresponding lane to the left of the fourth ramp; after crossing over a lane of the second road section, the third ramp and the fourth ramp are respectively communicated with an opposite-direction lane of the second road section by corresponding arc ramps. The grade separation structure of the urban underground tunnel or the urban underwater tunnel provided by the invention has the advantages of simple structure form, small quantity of road bifurcations (18 times of bifurcating), less overlapping layers, simple design and small construction excavation quantity.

The invention discloses a signal-level direct positioning method suitable for a distributed networked radar, is applied to the field of radar target positioning, and aims to solve the technical problem that an existing direct positioning method is not suitable for a distributed networked radar system. The method comprises the following steps: constructing a sub-array for positioning based on the number and position of activated array element antennas which can be subjected to multi-degree-of-freedom self-adaptive adjustment; then, calculating the array manifold of the constructed sub-array; establishing a sub-array element element level joint likelihood function according to the array manifold of the sub-array; and finally, according to the established sub-array element element level joint likelihood function, finding out an optimal estimation value of a target position through a multi-dimensional grid search and Newton iteration optimization method, and realizing signal level direct positioning of the target in the distributed networked radar system.

The invention discloses an agricultural product low-temperature negative-pressure drying and crushing integrated method and a system. The agricultural product low-temperature negative-pressure dryingand crushing integrated method comprises the following steps that (1) under the conditions of the negative pressure and the low temperature, agricultural products are subjected to turbulent-flow heating by reverse hot air in the process of moving from top to bottom under the self-weight action, then the agricultural products are cut and impacted, and after the agricultural products are crushed into agricultural product powder, the agricultural product powder ascends along with airflow to form a turbulent flow and is subjected to severe heat exchanging, so that the agricultural product powder is quickly dried; (2) under the conditions of the negative pressure and the low temperature, the agricultural product powder continuously ascends along with the airflow to be subjected to rotational-flow drying, so that the agricultural product powder is further subjected to heat exchanging drying; (3) gas-solid separation is conducted, and the dried agricultural product powder and tail gas are separated; and (4) under the conditions of the negative pressure and the low temperature, the tail gas is subjected to dust removing treatment, remained parts of the dried agricultural product powder arecollected. The agricultural product low-temperature negative-pressure drying and crushing integrated method and the system can realize quick drying and crushing of the agricultural products, and hasthe advantages that the system is saving in energy, quick in start-up, controllable in scale, reliable in industrialization, easy to operate, simple in system and the like.

The invention provides a preparation method of bamboo joint structure Mn2O3. According to the method, at first, rod-metal organic framework material Mn-MOF precursors are prepared by a guide agent assisting solvent volatilization method; then, in the air environment, the Mn-MOF precursors are calcined; the calcining temperature is controlled to be 400 to 650 DEG C; the time is 2 to 4h; finally, the materials are cooled to the room temperature along with the furnace temperature; the bamboo joint structure Mn2O3 nanometer structure materials can be obtained. The method provided by the invention has the advantages that the operation is simple; the process cost is low; the appearance is regular; the product stability is high, and the like. The industrial production is facilitated. The bamboo joint structure Mn2O3 nanometer structure material obtained by the method has the advantages of good conductivity and great specific surface area; the electrode resistance can be favorably reduced; the materials can be used for supercapacitor electrode materials.

This invention provides a memory device for semiconductor substrate, which is able to control the device scale and evenly guide the airflow to a substrate bracket. The space in the memory device (100) is limited by side plates (104, 105), a top deck (103) and the ground (202). The memory device is internally provided with a substrate bracket device (110) of a multi-layer substrate bracket (111) of a container (120) for loading the substrate. An air supply device (102) is mounted at the side plate (104) corresponding to the substrate bracket device (110). The component for blocking the airflowis mounted between the side plate (104) and the substrate bracket device (110) so as to insure the passage of the gas which flows in straight line path along an opening (110a) of the space between the air supply device (102) and the substrate bracket (111).

The invention provides a continuous rufinamide synthesizing method. The continuous rufinamide synthesizing method comprises, with existence of acid-binding agent, continuously inputting 1, 2, 3-triazole-4-methyl carboxylate and 2, 6-difluorobenzyl chloride into a first continuous reaction device for continuous condensation reaction to obtain continuous condensation products, and continuously discharging the continuous condensation products; continuously inputting the continuous condensation products and ammonia gas or ammonia-containing solution into a second continuous reaction device for ammonolysis reaction to obtain rufinamide, and continuously discharging the rufinamide. The continuous rufinamide synthesizing method not only avoids production of isomers during cyclization of conventional routes to simplify the purification process of finished products, but also effectively reduces the process costs and shortens the reaction route; meanwhile, compared with batch equipment, the continuous rufinamide synthesizing method is implemented in a continuous reaction device; due to the facts the reaction system is small and heat exchange speed is high, reaction conditions can be more intense but safer.

The embodiment of the invention provides a method and a device for dividing a cell cluster. The method comprises the following steps: calculating the business relevance between cells according to relevance statistical data between the cells, and finding maximum connected clusters, wherein the cells in each maximum connected cluster have strong relevance and the cells between the maximum connected clusters have weak relevance; when one cell belongs to multiple maximum connected clusters, attributing the cell to a unique cell cluster; according to geographical location information, merging cell clusters of which the scales are smaller than a cluster scale threshold to obtain the cell cluster which contains the cells according with the cell quantity threshold. According to the method and the device disclosed by the invention, the stable cell cluster which has a business sharing function and a reasonable scale is obtained by dividing each cell according to common network data and the cluster scale threshold so as to ensure that the multi-purpose cell cluster scale is controllable, and the cell cluster can be used for estimating whether the structure of a communication network is reasonable, whether the LAC (Location Area Code) boundary / BSC (Base Station Controller) boundary is reasonably divided, whether the frequency allocation is reasonable, and the like in subsequent works.

The invention relates to the technical field of metallurgy and in particular relates to a device for preparing metal powder by inert gas shielded plasmas. The technical scheme is as follows: a plasma generator is connected with a reaction control chamber, wherein a charging ejector is communicated above the reaction control chamber; a cooling collecting chamber is communicated below the reaction control chamber; the charging ejector, the reaction control chamber and the cooling collecting chamber are connected with an inert gas storage bottle, respectively; and a gas escape tube is further arranged on the cooling collecting chamber. The device for preparing metal powder by inert gas shielded plasmas can be used for preparing various metallic simple substances with a melting point of 300 DEG C to 15000 DEG C, alloy crystals, amorphous particles and powder, so that the preparation is free of purity and oxidative deterioration influences needed by the smelting points and the activities of the target metals, controllable in a large-scale manner and capable of realizing the laboratory production and large-scale industrial production. Moreover, the device is low in energy consumption, simple in process, and capable of repeatedly utilizing the inert gases and centrifugal axle cooling liquids in the gas chamber without pollution.

The invention discloses a Top-k combined space keyword query method. The target of the method is to find k query results with the minimum cost. According to the method, the scale-controllable query result can be finally returned, and more choices are provided for the user; in addition, by introducing the parameter k, k groups of result sets which meet the requirements of covering all the keywordsand realize the minimum cost are obtained. The technical problems that an existing space keyword query method is poor in user experience effect and poor in applicability and universality due to the fact that only a single query result is returned, and the index structure updating time cost is large due to the fact that an index structure is used for object storage can be solved.