57results about How to "Achieve redistribution" patented technology

The invention discloses an MEMS (micro electro mechanical system) device and a wafer-level vacuum packaging method thereof, wherein the MEMS device is composed of a glass substrate (1), a silicon wafer sensitive structure layer with a sealing ring (2), and a silicon cap (9), and the MEMS device is characterized in that at least two silicon islands (11) are arranged in the silicon wafer sensitive structure layer, the bottom of each silicon island (11) is connected with the glass substrate (1) and an electrode lead (8), a press welding spot (6) is respectively arranged on the top of each silicon island (11); parts, corresponding to the silicon islands, on the silicon cap are respectively provided with a press welding spot cavity (7), so that the press welding spots (6) are arranged in the press welding spot cavities (7); and the periphery of each press welding spot cavity is provided with a press welding spot sealing ring (12) which is connected and matched with the top of each silicon island, and the periphery of each press welding spot sealing ring is provided with a press welding spot isolation channel (5). The MEMS device and the wafer-level vacuum packaging method thereof disclosed by the invention have the advantages that the technical problem of electrical isolation between the leakproof structure of the press welding spot and the press welding spots caused by that an electrode is led in the surface of the structural layer of the device from the substrate is avoided, so that the vacuum packaging structure of the MEMS device disclosed by the invention is reasonable in design, simple in process, long in vacuum retention time, reliable in performance and versatile, thereby reducing the cost for vacuum packaging.

The invention relates to an electro-deionization method and device for concentrating and purifying heavy metal wastewater synchronously, belonging to a wastewater treatment technique, which adopts first-stage two-section or first-stage multi-section electro-deionization device, wherein the inner sides of the positive and negative poles are arranged with corresponding pole protection chambers, the desalting chamber is filled with large-hole strong-acid strong-base mixed bed resin with narrow particles distributed; cation exchange film is adopted as the direction-turning film, after direction-turning, two adjacent concentration chambers are arranged continuously, both are separated by cation exchange film, simultaneously after direction-turning, the first concentration chamber is filled with large-hole mixed bed resin with the volume of cathode resin more than 50 percent, the heavy metal wastewater to be treated enters the desalting chamber and the concentration chamber in two paths, the heavy metal ion and cathode in the desalted water flow are transferred into the concentration chamber so as to obtain the desalted water, the concentrated water flow is partially circulated or closely circulated so as to obtain the concentrated liquid of metal wastewater, thereby recycling valence metals and pure water resources synchronously and realizing zero emission and resource treatment of wastewater. Compared with the prior art, the wastewater treatment process has higher separation efficiency, more reliable operation, more convenient operation, continuous process operation and no secondary pollution.

The invention discloses a balanced high-heat type aluminum hot-welding agent. MgO is added into components and is reduced into elementary substance Mg under high temperature and heat is absorbed; and then Mg is oxidized into MgO under low temperature and the heat is released. Through this process, the redistribution of the heat during thermit reaction is realized and the purpose of uniform heat production is reached. The balanced high-heat type aluminum hot-welding agent comprises the components by weight portions as follows: 80-85 percent of CuO powder, 6-12 percent of Al powder, 6-9 percent of MgO, 0-1 percent of CaF2, and 0-1 percent of SiO2. The balanced high-heat type aluminum hot-welding agent has the characteristics of high heat, balance, and safety. The heating volume of the balanced high-heat type aluminum hot-welding agent is not sensitive to component parameters, thus being convenient for scale batch production, and being capable of being broadly used for quickly and reliably connecting metal structures or connection under outdoor power-less conditions.

The invention discloses a dynamic STKNN model-based short-time traffic prediction method. The method comprises the steps of: a, feature representation: averaging traffic conditions of each road segment in history days, and carrying out feature representation on each road segment by utilizing an average speed vector; b, automatic traffic mode recognition: automatically recognizing similar traffic modes of road networks through an AP cluster algorithm; c, automatic time interval division: aiming at the automatically recognized traffic modes, automatically dividing time intervals through a K-Means algorithm; and d, self-adaptive STKNN model construction: aiming at each time interval of each traffic mode obtained in the step 2 and 3, respectively constructing an STKNN model. The method is capable of directly helping the traffic management department to generate reasonable and efficient strategies to ease traffic congestion, thereby realizing redistribution of road network traffic flows andhelping the public to realize correct path planning.

The invention discloses a time domain energy interleaving transmission method based on extended weighted fractional Fourier transform, and belongs to the technical field of wireless communication. According to the invention, the problem of poor channel time domain burst error resisting performance of the existing communication method is solved. According to the invention, the modulated bit sequence is subjected to energy interleaving; by performing extended weighted fractional Fourier transform of different lengths on the groups for multiple times, time domain energy redistribution is realizedon the premise of ensuring that a receiving end can completely recover information data through energy de-interleaving, i.e., the energy of a single bit is dispersed to a plurality of bits participating in energy interleaving. Under the condition of a channel with a time domain burst error, fading of a single bit is shared by a plurality of bits, so that the energy loss of the single bit is greatly reduced, namely, the energy required by a receiving end for recovering bit information is reserved, and the reliability of a wireless communication system is effectively enhanced. The present invention can be applied to the technical field of wireless communications.

The invention relates to a gas diffusion layer as well as a preparation method and application thereof. The gas diffusion layer comprises a supporting layer, and a composite carbon material diffusionlayer and a microporous layer which are sequentially arranged on the surface of the supporting layer; the supporting layer is made of a porous material, and the composite carbon material diffusion layer comprises carbon nanotubes and carbon fibers. The support layer provided by the invention has high mechanical strength, and can be used as both a current collector and a diffusion layer frame substrate; the carbon nanotubes and the carbon fibers are mixed, the carbon fibers serve as a base frame, the carbon nanotubes serve as filler of the frame, the requirement for high air permeability of thegas diffusion layer is met, and high mechanical strength is achieved; the microporous layer can fill up pores with different sizes of the diffusion layer, and can also slow down the unevenness phenomenon of the diffusion layer, so that redistribution of water and reaction gas in a flow field and the catalyst layer is realized, the conductivity is increased, and the service life of a battery is prolonged.

The invention discloses a multipurpose small rectification system for a laboratory. The multipurpose small rectification system comprises a feeding device and a rectification tower connected to the feeding device in series. The top of the rectification tower is orderly connected to a condenser and a return tank. A liquid outlet end of the return tank is connected to two pipes, one of the two pipes is provided with a return pump, has a liquid outlet end connected to the top of the rectification tower and is a return pipe, and the other one of the two pipes is connected to a top material tank and is a product pipe. A material outlet at the tower bottom is orderly connected to a bottom material pump and a bottom material tank by pipes. The rectification tower comprises a tower bottom, a tower body and the top of the tower. The tower bottom is connected to the bottom end of the tower body. The top of the tower is connected to the top end of the tower body. The tower body comprises multiple tower sections, each two adjacent tower sections are detachably connected by a connection section, and each one of the tower sections is filled with a filling material. The multipurpose small rectification system can realize industrial production-simulative continuous rectification in a limited space of a laboratory, can carry out a normal-pressure vacuum rectification test, a common continuous rectification test and an extraction rectification test and satisfies requirements on a plurality of tests in the laboratory.

The invention discloses a back passivation contact structure, a preparation method thereof and a solar cell. The method comprises the following steps: depositing a tunneling oxide layer on the back surface of a silicon wafer; sequentially and alternately depositing intrinsic polycrystalline silicon layers and doped polycrystalline silicon layers on the surface of the tunneling oxide layer in a direction far away from the silicon wafer to form a laminated film layer, wherein the last layer of the laminated film layer is a doped polycrystalline silicon layer; and eactivating doped atoms in the doped polycrystalline silicon layer, and diffusing the doped atoms to the intrinsic polycrystalline silicon layer, so that the laminated film layer becomes a complete doped film layer, and the passivation contact structure is obtained. The intrinsic polycrystalline silicon layers and the doped polycrystalline silicon layers are alternately deposited to form the laminated film layer, the doped atoms in the doped polycrystalline silicon layers are activated, so that the doped atoms are diffused into the intrinsic polycrystalline silicon layers, and all parts of the laminated film layer are doped with the doped atoms. The intrinsic polycrystalline silicon layers are prepared in the laminated film layer, and the deposition speed of the intrinsic polycrystalline silicon layers is high, so that the preparation time is shortened under the condition that the thickness of the doped film layer is the same.

A method for forming an isolated inner lead from a leadframe is revealed. The leadframe primarily comprises a plurality of leads, the isolated inner lead, and an external lead. Each lead has an inner portion having a finger. The isolated inner lead having two fingers is completely formed inside a molding area and is made of the same metal leadframe as the leads. One finger of the isolated inner lead and the fingers of the leads are linearly arranged. The other finger of the isolated inner lead is adjacent to a finger of the external lead. At least one of the inner portions divides the isolated inner lead from the external lead. The isolated inner lead is integrally connected to an adjacent one of the inner portions by a connecting block. A tape-attaching step is performed to mechanically connect the isolated inner lead where two insulating tapes are attached in a manner that the connecting block can be removed. Therefore, the isolated inner lead is electrically isolated from the leads and can be mechanically fixed to replace extra redistributing components during semiconductor packaging processes.

The invention discloses a centrifugal machine balancing device based on position adjustment of the rotation center. The centrifugal machine balancing device comprises a rotating arm, a rotating arm support, a motion guiding mechanism, a fixed counterweight and a test piece. The rotating arm support is fixedly connected with a rotating shaft of a centrifugal machine and fixedly connected with the rotating arm through the motion guiding mechanism. The fixed counterweight and the test piece are arranged at the two ends of the rotating arm correspondingly. A dynamic balancing method comprises thesteps that the values of FA and FB are judged, if FA is greater than FB, a motion executing mechanism A is elongated, a motion executing mechanism B is shortened synchronously, otherwise, the motion executing mechanism B is elongated, and the motion executing mechanism A is shortened synchronously; and the rotating speed of the centrifugal machine is changed, and the test piece end of the centrifugal machine is subjected to acceleration compensation. According to the centrifugal machine balancing device, by controlling the rotating arm to move relative to the rotating arm support under restraint of the motion guiding mechanism, adjustment of the rotation center is completed; and the real-time balancing method is adopted, when unbalanced force is gradually increased with increasing of the rotating speed, a balancing system also adjusts the position of the rotating arm synchronously, and thus dynamic balancing can be achieved in the full rotating speed range of the centrifugal machine.

The invention relates to method for preparing an electrode for a fuel cell. The method includes the steps: 1) providing an electrode substrate; 2) forming a microporous layer on the electrode substrate; 3) forming a nano carbon layer on the surface of the microporous layer; and 4) forming a catalyst layer on the surface of the nano carbon layer. The microporous layer is formed by using a specific method. The fuel cell prepared by the method disclosed by the invention has extremely high electrochemical efficiency and output power.

The invention discloses a self-cleaning waste water pipe rack. A stirring main shaft in the pipe rack drives a main stirring disc and secondary stirring discs to longitudinally stir sewage and waste water, such that pollutants are smashed and dispersed, meanwhile, a gas pipe rotates around a fixed bearing to drive and overturn a hollow body and vertical discs to transversely stir the sewage and the waste water, such that the smashing and dispersing effects of the pollutants are enhanced. In addition, overturning air pores and pipe air pores can outward spray gas during rotation to enhance a stirring capacity for the pollutants, water passing holes can reduce the resistance of the sewage during movement, and cross-shaped reinforcing ribs can avoid blockage of the water passing holes by thepollutants. The self-cleaning waste water pipe rack in such design not only can perform longitudinal and transverse stirring and has higher stirring and smashing functions, but also can realize dispersing by heating, is better in dispersing and uniformizing effects and is favorable for re-discharging the processed sewage and waste water.

The invention provides a message forwarding method and system. The method is applied to a switch, and comprises the following steps: a switch chip receives a message to be forwarded; after determining that a target ARP table item corresponding to the message to be forwarded is not stored in an ARP table, a CPU acquires the target ARP table item, associates a priority identifier for the target ARP table item, and issues the target ARP table item to a switch chip ARP table; when ARP storage resources in the switch chip ARP table are exhausted and the target ARP table item is associated with a high priority identifier, the CPU replaces any ARP table item that is associated with a normal priority identifier in the switch chip ARP table as the target ARP table item; and the switch chip forwards the message to be forwarded according to the target ARP table item. By adopting the message forwarding method and system provided by the invention, the ARP table items of the switch chip are associated with different priority identifiers, the ARP table items with low priority are replaced by the ARP table items with high priority, and thus the switch chip can store the three layers of forwarded ARP table items when the ARP storage resources are exhausted, and network delay or interruption caused by excessive usage of the CPU when forwarding the three layers of messages can be avoided.

The invention discloses a method for inhibiting Laves phase precipitation in a nickel-based alloy laser additive manufacturing process. The method specifically comprises the following steps that a base material is placed on a workbench with a cooling device, a synchronous inhibiting device is well installed, a semiconductor laser and a boiling type powder feeder are started to start cladding of metal powder, meanwhile, three chilling copper pipes of the synchronous inhibiting device are used for chilling the edge of a molten pool, after machining is completed, a sample is scanned, and the cross section structure condition of the sample is observed. According to the method, in the laser additive manufacturing or remanufacturing process of the nickel-based superalloy, a chilling source is added around the liquid molten pool, redistribution of a temperature field in the molten pool can be achieved, the front edge temperature gradient of a solid-liquid interface is increased, the solidification speed of the molten pool is increased, gathering of segregation elements such as Nb, Al and Ti among dendritic crystals is effectively reduced, and a guarantee is provided for precipitation of a strengthening phase in the subsequent aging treatment process.

The invention discloses a method and system for improving the comprehensive performance of a coal-fired power plant boiler SCR system. According to the technical schemes, the method comprises the steps that: the NOx distribution deviation coefficient of the section of a flue behind a denitration catalyst layer is obtained; the ammonia spraying amount of ammonia spraying branch pipes is dynamicallyadjusted; whether the activity of a regional catalyst is reduced or inactivated is judged; the ammonia spraying amount and a flue gas amount are roughly distributed; and the ammonia spraying amount and the flue gas amount are finely adjusted. According to the method and system, the flue gas amount redistribution mode is adopted in all areas of the section of the flue, the catalyst area with goodactivity is fully utilized, the catalyst area with poor activity or inactivation is avoided, and the comprehensive performance of an SCR denitration device is improved.

The invention discloses a rotating packed bed for treating ammonia-nitrogen wastewater, belongs to the technical field of wastewater treatment, and aims to provide therotating packed bed for treatingammonia-nitrogen wastewater. The rotating packed bed comprises a shell, wherein a gas inlet is formed in one side of the shell; a gas outlet is formed in the top of the shell; a liquid inlet and a liquid outlet are respectively formed in the bottom of the shell; an annular packing support frame is arranged in the shell; packing is arranged in the packing support frame; a tubular liquid distributoris arranged in the center of the packing support frame; a plurality of nozzles are arranged ina connecting pipe of the tubular liquid distributor; the center of the top of the packing support frame is connected with a driving device through a rotating shaft; a gas distributor is arranged at the gas inlet; and a plurality of liquid redistributors are arranged on the side wall, parallel to the rotating shaft, of the shell. According to the invention, ammonia nitrogen in the ammonia nitrogen wastewater can be controlled at a certain concentration, so that the ammonia nitrogen wastewater is discharged after reaching the standard.

The invention discloses a bearer identifier allocation method, terminal equipment and network equipment. The method comprises the following steps: determining that a bearer identifier needs to be allocated to a bearer; and when a predetermined condition is met, allocating a first bearing identifier and a second bearing identifier to the bearer. In the embodiment of the invention, the network unitdistributes the first bearing identifier and the second bearing identifier for the bearer, so that the service can be smoothly switched or transferred when the UE moves to the communication network which does not support the extended bearing, the continuity of the service is ensured, and the service experience of a user is improved.

The invention discloses a garment sewing assembly line optimization method. According to the method, an ant colony algorithm is improved by utilizing a genetic algorithm. By referring to the ideas ofchromosome crossover and variation in the genetic algorithm and combining the ability of the ant colony algorithm to quickly search the optimal value and the robustness of the solving performance, thegarment sewing assembly line is optimally designed. The crossover and variation thought in the genetic algorithm can better achieve recombination and redistribution of sewing assembly line processes,and the robustness of the ant colony algorithm solution performance can enable the ant colony algorithm solution performance to be easily applied to the garment sewing assembly line optimization problem. And meanwhile, the advantage of quick search of the ant colony algorithm can be fully exerted, optimized recombination of the garment sewing assembly line can be more accurately and more quicklyachieved, the number of iterations is reduced, and divergence is avoided.

The invention discloses a method for improving performance of a device of an SONOS (silicon-oxide-nitride-oxide-silicon) structure. The SONOS structure comprises a substrate, a tunneling dielectric layer, a charge storage layer, a barrier dielectric layer and a conducting layer, wherein the substrate comprises a source and a drain inside, and the tunneling dielectric layer, the charge storage layer, the barrier dielectric layer and the conducting layer are arranged on the substrate from bottom to top in sequence, wherein a concave SONOS structure design is adopted and a graded silicon nitride layer is used for forming the charge storage layer. The method has the following beneficial effects: the formation of the concave SONOS structure facilitates the difference of distribution of the electric field strength in different layers, so that the compiling and erasing speeds can be increased, and the impact of the erasing saturation on the erasing speed can be inhibited; due to relatively low difference between the Young's moduli of the graded silicon nitride layer and the tunneling silicon oxide layer, the impact of stress caused by relatively high difference between the Young's moduli of the tunneling silicon oxide layer and the silicon nitride on the device can be reduced; and the trapped electrons can be redistributed by the gradual silicon nitride layer, so that the storage charges can be distributed in the charge storage layer more uniformly.

A sewage pipeline, the stirring spindle drives the stirring unit to rotate to drive the horizontal plate and the stirring extension part to stir the sewage and waste water. The stirring extension part includes a vertical pipe and a horizontal pipe, and the medicine outlet hole of the plate and the medicine outlet hole of the part can be supplemented and decomposed online The medicine and heating device can provide heat energy to the mixing room. The connecting room and connecting port are conducive to the re-discharge of treated sewage and wastewater. The temperature sensor installed in the side wall of the mixing room can monitor the temperature in the mixing room. This design not only has a strong mixing and crushing function, can be heated and dispersed, and has a better dispersion and homogenization effect, but also can supplement and decompose drugs online, which is beneficial to the re-discharge of treated sewage and waste water.

The invention relates to a method for depositing an InGaN film on a Si(100) substrate via double-optical-path pulse laser. The laser is divided into two paths to irradiate a target material. The method concretely comprises that the cleaned Si(100) substrate is placed on a substrate platform, heated to 650-750 DEG C, and thermally insulated for 50-70min; TiN, AlN, GaN and InGaN layers are depositedsuccessively in the laser energy of 150-250mJ, 50-150mJ, 200-300mJ and 100-200mJ for deposition time of 10-30min, 30-50min, 50-70min and 50-70min respectively; and the InGaN layer undergoes a double-optical-path technology. The crystal quality of the thin film can be improved, and the efficiency of devices as a semiconductor laser, light emitting diode and solar battery can be improved greatly.

The present invention discloses an OD allocation method considering the travel habits of residents. The method comprises the following steps: A, determining a strategy for implementing road traffic management, and an implementation scope; B, identifying whether the starting point of the travel mode affected by the strategy is within the implementation scope; C, determining the comprehensive scoreof various travel modes; D, based on step C, determining an alternative travel mode of the existing travel mode affected by the strategy; and E, determining the road traffic flow distribution with theexisting travel mode and the alternative travel mode. According to the OD allocation method disclosed by the present invention, the existing blank for implementing OD re-allocation under the trafficmanagement strategy is made up, and the authenticity of the road traffic management strategy implementation assessment can be achieved as much as possible.

The invention relates to an antigravity dilute-phase pneumatic conveying device for fluid. The device comprises an atomizing cavity, a buoyancy tube, an atomizer, an inflow pipe and an air inlet pipe, wherein the atomizing cavity is connected with the buoyancy tube, the atomizer and the air inlet pipe; the inflow pipe is connected with the atomizer; water or dust in the inflow pipe is sprayed into the atomizing cavity without passing through the atomizer, and is mixed with high pressure draft which enters the atomizing cavity from the air inlet pipe to form gas-water or gas-dust dilute-phase multi-phase flow; and the dilute-phase multi-phase flow is conveyed by the buoyancy tube towards the antigravity direction under the action of pressure difference between the upper end and the lower end of the buoyancy tube, and enters into atmosphere at the outlet of the buoyancy tube finally. The invention proposes that substances, such as water or duct, on the earth are conveyed vertically to the atmosphere with different heights by a gas-water or gas-dust mixed stream mode; the atomized water conveyed to the atmosphere can be combined with original water drops in the atmosphere by impacting to form rainfall by chain effect, or stays in the atmosphere to change atmosphere humidity and lighting conditions; and the dust conveyed to the atmosphere can form condensation nucleus of water to realize artificial precipitation. The device can realize artificial regulation of rain, and can be used in the field of demisting, agricultural irrigation, fire-fighting, artificial weather and climate, desert treatment and the like.

The invention provides a transmission method and system of interactive digital signals belonging to the digital signal processing technology field. The method comprises: receiving at least a request signal of digital interactive information and outputting an obtaining instruction and a distribution signal of digital interactive information corresponding to the request signal according to the request signal; obtaining the digital interactive information corresponding to the request signal according to the obtaining instruction and outputting it; receiving output the digital interactive information and encrypting the same and sending processed digital interactive information, after modulated by a corresponding QAM modulation device, to corresponding digital TV receiving terminal via the transmission channel of digital signals, which realizes recycling and re-distribution of idle digital signal transmission channels when the user changes service content and saves network bandwidth with strong applicability.

The invention provides large-scale winter jujube intelligent dynamic optimization equipment based on grid structure pre-positioning, and solves the problems of high labor intensity, low screening efficiency and low screening quality in screening of superior and inferior jujubes in the prior art. The large-scale winter jujube intelligent dynamic optimization equipment comprises a machine frame, a conveying mechanism, a transport mechanism and a removing mechanism; the conveying mechanism is arranged at the upper part of the machine frame and is used for transporting the winter jujubes and realizing low-degree damage of the winter jujubes and connection with the transport mechanism; the transport mechanism is arranged below the conveying mechanism and is used for redistributing the winter jujubes, so that the single jujube in a single grid is guaranteed, and the subsequent treatment of the device is facilitated; and the removing mechanism is arranged at the downstream of the transport mechanism and is used for carrying out image recognition on the winter jujubes of the transport mechanism and carrying out fixed-distance push-pull type removing. According to the equipment, the pre-positioning function of the winter jujubes is achieved through the comb-tooth-shaped conveying structure, the whole equipment can achieve dynamic overall all-around information collection and high-precision advantage and disadvantage judgment of the winter jujubes, the inferior jujubes are removed through the fixed-distance push-pull type lever principle, and the equipment has the advantages of beinghigh in recognition rate and large in handling capacity.

The invention discloses a high and medium pressure joint heat supply system based on energy level matching. The high and medium pressure joint heat supply system based on energy level matching comprises a high pressure heat supply steam system, a medium pressure heat supply steam system and a steam-steam heat exchanger system. Firstly, the novel steam-steam heat exchanger system is designed, by means of the system, energy redistribution is achieved, temperature lowering of the medium pressure heat supply steam system is achieved, heating of high pressure heat supply steam is also achieved, and gradient utilization of energy is achieved by achieving two benefits; secondly, according to the heat supply scheme, steam extraction is used for replacing raw main steam heat supply, separate production of heat and power of the original high pressure heat supply steam is changed into combined production of heat and power, and the energy utilizing efficiency is improved; and thirdly, a high pressure heat supply bypass and a medium pressure heat supply bypass system are designed, and by means of cooperation of a heat supply main way and the bypasses, the variable work condition requirement of heat supply is flexibly and conveniently met. Thus, by means of the high and medium pressure joint heat supply system based on energy level matching, the energy utilizing efficiency is improved, and the heat supply reliability is also improved.

The invention discloses a vertical pipe high efficiency falling-film evaporator suitable for evaporation of small flow, high viscosity and heat-sensitive materials. The vertical pipe high efficiency falling-film evaporator mainly comprises a liquid distributor, drain pipes, spiral nozzles, heat exchange pipes, fixed rods, positioning pipes, vapor-liquid redistribution elements and fixed parts. Theliquid distributor and the spiral nozzles are connected by the drain pipes, and the heat exchange pipes are internally equipped with the vapor-liquid redistribution elements. The vertical pipe high efficiency falling-film evaporator provided by the invention has the beneficial effects that: the evaporator solves the initial distribution problem of small flow and high viscosity materials, solves the problem that parts of liquid drops directly fall from a pipe center without full heat exchange because of steam flow impact in the liquid falling process, and solves the problem that high viscositymaterials flow difficultly, the liquid on the inner surfaces of heat exchange pipes cannot be renewed timely, and therefore the heat transfer efficiency of the evaporator is reduced.

The invention discloses a thermostat device capable of performing continuous variable temperature control in a wide temperature zone, which comprises a low-temperature refrigerating system, a sample cavity assembly, a heat insulation assembly and a sample temperature control system. A sample rod body (43) in the sample cavity assembly is provided with a sample temperature sensor (54) and a sample heater (55) which are respectively connected with a temperature controller (57) in the sample temperature control system, the temperature controller (57) is connected with an upper computer (56) through a circuit, and the upper computer (56) performs PID closed-loop control on the sample temperature sensor (54) and the sample heater (55) through the temperature controller (57). A static helium pressure sensor (64) connected with the upper computer (56) is arranged on a static helium pipeline communicated with a static helium interface (47) in the sample cavity assembly. The device disclosed by the invention can realize continuous variable temperature control in a wide temperature zone of 2-800K, and meets the requirements of the current high-end physical property measurement field.

The invention relates to a desulphurization absorbing tower having flow-guiding bodies on a tower wall. The desulphurization absorbing tower comprises a tower body, a slurry pool, a spraying layer, and the discontinuous flow-guiding bodies arranged below the spraying layer and on the tower wall, wherein the flow-guiding bodies are at least one group. Through a discontinuous arrangement mode of theflow-guiding bodies, the problem that energy consumption of the desulfurization absorbing tower provided with a synergistic flow-guiding ring is high in the prior art can be solved, and the desulfurization tower has active technical meaning.

The present invention relates to the technical field of maize cultivation and in particular to a dryland farming and water-saving cultivation method for maize in an arid cropland in loess plateau. Rotary tillage, drip irrigation tape laying, film mulching and seeding integrated operation is adopted, a narrow line is 40 cm wide, a wide line is 60 cm wide, ridges are formed in the wide row, a drip irrigation tape is laid, the ridges serve as rain collecting regions, furrows serve as planting regions, the slopes of the rain collecting ridges are 35 DEG, and the ridges are 30 cm high and are disposed in an east and west direction; mechanical hole sowing is performed, a degradable water-absorbing fiber ball is buried in each of front, rear, left and right sides of each hole, the hole spacing iskept at 24-27 cm, the sowing depth is kept at 3-4 cm, the line spacing in the furrows is kept at 40 cm, and the planting density is kept at 5000-5500 per mu; and the total ground is covered with a plastic film with the width of 120 cm and the thickness of 0.08 mm, the edge of the plastic film is fixed and pressed with soil so that the plastic film is prevented from being damaged by wind, film mulching is kept for 10 d, a mulching film clings to the ground or perforation is performed every other 50 cm in the furrows after rainfall. By using the dryland farming and water-saving cultivation method, the emergence rate and survival rate of seedlings may be increased, and meanwhile, the utilization efficiency of water may be remarkably increased.