116results about How to "Avoid uncontrollability" patented technology

The invention discloses a robot cable gallery field fire early warning and fire extinguishment method, device and system. The method comprises the steps that whether to receive a warning signal or notis judged; if not receiving the warning signal, a fire protection inspection robot conducts automatic inspection, receives tunnel internal environment information and crucial location temperature information, compares the tunnel internal environment information and the crucial location temperature information with set fire threshold values and generates a fire signal or conducts field fire risk assessment; if receiving the warning signal or generating the fire signal during automatic inspection, the robot conducts fire pre-identification according to the risk analysis and assessment result, optimizes fire pre-identification at the early smoldering stage, rapidly positions the location of a pre-identified fire source, determines the authenticity, performs the fire extinguishment task and then safely evacuates after completing the task. Through the robot cable gallery field fire early warning and fire extinguishment method, device and system, the capabilities of conducting fire safety pre-warning and fire warning, rapidly searching for the fire source and extinguishing the fire for a cable gallery (tunnel) are greatly improved.

The invention relates to a high-temperature-resistant heteromorphic nanocrystalline aerogel material and a preparation method thereof. The method is as follows: preparing heteromorphic nanocrystal dispersion liquid; mixing the heteromorphic nanocrystal dispersion liquid and an assembly agent evenly by stirring and ultrasonic treatment to obtain a mixture phase first solution; then adding a catalyst solution, performing a gelation reaction process by stirring and ultrasonic treatment, and then performing a vacuum pumping process to obtain gelation reaction liquid; and performing an aging step and a drying step to obtain a heteromorphic nanocrystalline aerogel material; the heteromorphic nanocrystalline aerogel material is subjected to post-treatment in two or more different temperature stages to obtain the high temperature-resistant heteromorphic nanocrystalline aerogel material. The invention performs a staged heat treatment process on the aerogel material in the post-treatment process, thereby realizing the strengthening and toughening of themicrostructure of the aerogel material, so that the structural strength of the aerogel material is remarkably improved, the high temperature resistance performance and the large specific surface area after the heat treatment are realized, and the preparation of the high-temperature-resistant heteromorphic nanocrystalline aerogel material capable of high-efficient heat insulation is realized.

The invention discloses a deep hole underwater installation and locating method of a steel pipe column in a weak watery stratum, concretely comprising the following construction steps of firstly, pouring concrete with a design height in the steel pipe column, and installing and locating a screw jack at the bottom of the steel pipe column; secondly, measuring and paying off on the construction ground surface, and drilling by a drill; thirdly, installing a drilling pile reinforcement cage in a hole; fourthly, installing a location platform on the construction ground surface; fifthly, hoisting the steel pipe column and putting the steel pipe column in a drilling pile hole; sixthly, locating the top part of the steel pipe column by the ground surface location platform; seventhly, locating and measuring the verticality of the steel pipe column by a laser plummet; eighthly, locating the bottom of the steel pipe column by the screw jack; ninthly, pouring drilling pile concrete underwater to the design burying height of the steel pipe column; and tenthly, pouring steel pipe column internal concrete to the top of a steel tube after the drilling pile internal concrete achieves the design strength of 70 percent. The method has the advantages of simple operation, high construction efficiency, low construction cost, high and controllable installation accuracy and little safety risk.

The invention relates to a method for calculating an optimal heating curve of a blank in a heating furnace and stepping and heating of the blank in the heating furnace can be realized mainly by position tracking and temperature tracking. The original furnace temperature schedule is revised by comprehensive considering of a difference between the tapping temperature and the target temperature of the blank and a heating rate of the blank, and the blank is reheated by the revised furnace temperature schedule; for the blank satisfying the tapping temperature, the fuel consumption used for the heating in the time is represented by an integral-replaced objective function; and after the optimizing calculation can be carried out for specified number of times, one integral-replaced objective function having the least value is selected out, and a heating curve corresponding to the integral-replaced objective function having the least value is taken as the optimal heating curve of the blank with the size. According to the method for calculating the optimal heating curve of the blank in the heating furnace, the calculations of the optimal heating curves of a plurality of blanks before the blanks are sent into the furnace can be finished, and the calculating efficiencies are high; and a heating schedule is beneficially revised by the calculated optimal heating curve of the blank by a heating furnace mathematical model, the heating quality of metal and the production efficiency of the heating furnace are improved, and the optimal control of the heating furnace is beneficially realized.

The invention discloses a two-dimensional code access control system based on face feature values, and a running method thereof. The system includes a user terminal, and an image collecting device, afront end identifying and processing device and a background server which are sequentially connected. The running method of the system comprises the following steps: a user sends a two-dimensional code registration request to the background server through the user terminal; the background server sends an access control two-dimensional code to the user terminal according to the request; the image collecting device collects the face image of the user and an access control two-dimensional code image; the front end identifying and processing device extracts face feature information of the face image, parses the face feature information included in the access control two-dimensional code image and compares the similarity between the two pieces of the face feature information, and the backgroundserver verifies the validity of the access control two-dimensional code; and after the similarity meets conditions and the validity verification of the access control two-dimensional code is passed,an access control is controlled to be open. The validity of the two-dimensional code user and the validity of the used two-dimensional code are verified based on the information provided by the user in order to perform security management of the access control.

The invention provides a simulated climate chamber of an underground coal mine thermal environment and a test method. The simulated climate chamber is provided with a control cabinet, a first computer, a temperature-humidity system, a fresh air system, a simulated air system, a human body micro-climate acquisition system, an alarm system, and a human body physiological index test system. The simulated climate chamber comprises an experiment preparation room, a test room, and an equipment room. The test method of the simulated climate chamber consists of four steps. Through the simulated climate chamber, personal protection cooling suits for mine and protective properties of the cooling suits can be subjectively and objectively evaluated. Through the simulated climate chamber, the underground coal mine thermal and humid environment can be relatively really simulated; comparatively accurate data is provided; and environment uncontrollability during a live environment test is avoided. The simulated climate chamber and the test method can meet practical operational needs.

The invention discloses a preparation method of a horizontal array carbon nano tube, and relates to the preparation method of the carbon nano tube. The invention provides a preparation method of the horizontal array carbon nano tube based on a near field electrostatic spinning direct writing catalyst nanowire. The method comprises the following steps of: 1) mixing ethanol liquor of at least one metal chloride of Fe, Mo, Co, Ni, Cu and Cr with polymer liquor to obtain mixed liquor, and then, directly writing a catalyst nanowire pattern on a substrate by a near field electrostatic spinning technology; 2) removing organic matters on the catalyst nanowire for the sample obtained by the step 1); and 3) placing the sample without the organic matters on the nanowire in a heating furnace to be heated, and introducing a mixed gas of hydrogen and inert gas for reduction reaction, then maintaining the temperature, reducing the catalyst nanowire to nano metal particles with catalytic activity, and continuously heating and introducing a carbon source gas for cleavage reaction to obtain the horizontal array carbon nano tube. The method is simple to operate, high in efficiency, low in cost and easy to control.

A fabricated recoverable-function steel frame-supporting system connected by prestressed joints is provided. The fabricated recoverable-function steel frame-supporting system connected by the prestressed joints comprises fabricated joints I, fabricated joints II, supporting structures and floor slabs, the fabricated joints I are fabricated prestressed column-column splicing joints and located in inflection points of columns, and the fabricated joints I comprise prestressed pull rod supporting plates, stiffening plates, half-welded lug plates, web splicing plates and prestressed pull rods; the fabricated joints II are fabricated prestressed beam-beam splicing joints and comprise cantilever beam section flange plates, middle beam section flange plates and rear-tensioning prestressed cables; the supporting structures are arranged between every two vertically adjacent steel beams in pairs, and each pair of the supporting structures comprises supporting rods, supporting rod sleeves, lower end connection pieces and upper end connecting pieces; and the floor slabs comprise three types of prefabricated concrete floor slabs, namely the I-type plate, the II-type plate and the III-type plate. According to the fabricated recoverable-function steel frame-supporting system connected by the prestressed joints, novel prestressed steel beam and steel column splicing joints are adopted, the fabricating efficiency of the structure of the fabricated recoverable-function steel frame-supporting system is improved, rapid construction is achieved, and rapid restoration and rapid rebuilding can be achieved after an earthquake.

The invention discloses a method for producing an urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material and an application of the composite material on a negative electrode of a lithium ion battery. The urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material is produced by a one-step hydro-thermal synthesis technology through self-assembly by using a coordination principle and a molecule self-assembly method. The method comprises the following steps: 1) preparing oxidized graphene, 2) preparing a graphite oxide sol with surface having negative electricity; and 3) producing the urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material through reduction. The reaction process is carried out in an aqueous solution, other reagents are not required, and the method has the advantages of simple process, low cost, energy saving, environmental protection, and easy industrial batch production. As the negative electrode material of lithium ion battery, the three-dimensional composite structure of the material is in favor of diffusion of an electrolyte in the composite material as well as transmission of electron and ion in the material, and performances such as charge and discharge capacity, cycle life and multiplying power of the composite material can be effectively increased.

The invention discloses a converter valve tower self-locking draining adapter which comprises a male connector connected with a water guide pipe and a female connector connected with a communicating water pipe connector at the bottom of a valve tower. The male connector is in butt joint with the female connector. The female connector comprises a hollow cylindrical body, a limit sleeve, a hollow outer sleeve, and a movable shaft disposed in the body. A conical spring pushing the movable shaft to move is disposed between the right end of the movable shaft and the outer sleeve. An inverted trapezoid limit groove for accommodating steel balls and locking the position of the male connector is peripherally formed along in the coordination part of the male connector and the female connector. The converter valve tower self-locking draining adapter has the advantages that the maintenance efficiency can be increased, the skill requirements of maintainers are lowered greatly, and the adapter is especially suitable for emergency maintenance. Compared with the existing tools, the converter valve tower self-locking draining adapter can directly reduce direct-current shutdown by 6 hours per electrode or per valve set, and the output value can be increased by about 31,500,000 yuan if a single electrode or a single valve set transmits 1030MW of electricity.

The invention relates to a preparation method of a functionalized carbon fiber membrane capable of adsorbing and degrading micro-plastics. The preparation method comprises the following steps: mixinga functionalized carbon fiber membrane and micro-plastics in a mass ratio of 1: 0.01-0.5 wt% of an amidoxime-modified polyacrylonitrile fiber membrane (the content of amidoxime groups is 0.5-15wt%) and more than one of metal salts (MnCl2.4H2O, MnSO4.4H2O, FeCl3.6H2O, Fe(NO3)3.9H2O, CoCl2.6H2O, Co (NO3)2.6 H2O, Co(Ac)2.4H2O, NiCl2.6H2O, Ni(NO3)2.6H2O and Ni(Ac)2.4 H2O) are prepared; the membrane isused as a cathode, a BDD electrode is used as an anode, and the micro-plastic is degraded through an electro-Fenton oxidation method.

The invention discloses a special multifunctional prefabricated pavement brick. The special multifunctional prefabricated pavement brick sequentially comprises a concrete plate body layer, a sticky layer, a light-emitting functional layer and a tail gas absorbing functional layer from bottom to top, wherein the concrete plate body layer is made of fiber concrete; the sticky layer is made of modified emulsified asphalt or resin material; the light-emitting functional layer is a graded light-emitting broken stone layer which is composed of a colorless cementing material and graded light-emitting broken stones; and the tail gas absorbing layer is made of anatase type nano silicon dioxide powder which synchronously spreads on the light-emitting function layer. The special multifunctional prefabricated pavement brick disclosed by the invention has the night light-emitting function and the function of absorbing automobile tail gas, realizes the purpose of absorbing and degrading automobile tail gas in daytime and emitting light at night; and through a prefabricating mode, the effect of the special multifunctional prefabricated pavement brick is sufficiently brought into play, the use is convenient and the practicability is high.

The invention belongs to the technical field of deep foundation pit construction, and discloses a steel pipe column insertion accurate positioning structure. The steel pipe column insertion accurate positioning structure comprises a steel pipe column, wherein a tool joint is connected to the outer side of the steel pipe column. The steel pipe column insertion accurate positioning structure furthercomprises a preset hole, a protective cylinder arranged in the preset hole and a positioning platform; one end of the protective cylinder is exposed out of the ground; the positioning platform is positioned above an opening of the preset hole and connected with the ground through threaded steel; the positioning platform is provided with a positioning pin used for limiting the steel pipe column; the steel pipe column is inserted into the protective cylinder; section steel is arranged on the two sides of the end, exposed out of the ground, of the protective cylinder; channel steel is perpendicularly arranged on the section steel; and the bottom end of the steel pipe column is fixed to the plane of the bottom of the hole through a fixing piece. According to the steel pipe column insertion accurate positioning structure, on the basis that the input cost is saved, the perpendicularity and the center position of the steel pipe column can be directly measured in the whole construction process, correction is conducted in time after the cost is reduced, and the uncontrollability of error accumulation and untight contact between the steel pipe column and a positioner in a traditional technology is avoided. The invention further discloses a construction method for conducting accurate positioning through the structure.

The invention proposes a high-precision self-resetting probe-type displacement measurement device and a measurement method. The measurement device comprises a bottom part support unit, a linear motion unit, a linear drive unit and a top part connection unit. The linear motion unit and the linear drive unit are mounted between the bottom part support unit and the top part connection unit in parallel and opposite. The bottom part support unit and the top part connection unit are arranged in parallel. The linear drive unit and the linear motion unit are connected to control the probe in the linear motion unit to vertically move upwards and downwards so as to realize the automatic measurement and self-resetting. The linear motion unit further comprises a displacement sensor to measure the displacement amount of the probe in the vertical direction. According the method, the face-to-face working manner of the linear motion unit and the linear drive unit is utilized for the contact type measurement. With the method, high-precision self-resetting automatic measurement function can be realized. The measurement method is simple and convenient, ensures relatively high stability and reliability, shortens the detection time, increases the measurement efficiency and guarantees the measurement accuracy.

The invention discloses a preparation method and an application of a graphene film composite activated aluminum oxide adsorbent adsorbing heavy metal ions and organic matter from waste water. The preparation method comprises the following steps: 1) taking activated aluminum oxide as a substrate, adding activated aluminum oxide into a polyvinyl alcohol organic solution to allow the surface of activated aluminum oxide to be rich in hydroxyl, putting in an oven at 20-50 DEG C for drying, obtaining the pretreated substrate for later use; 2) immersing the pretreated substrate in an alcohol solution containing a silane coupling agent with a volume concentration of 0.1-10%, taking out the substrate for drying, adding the substrate into an organic solution containing 0.1%-10 wt% of graphene, performing reaction for 1-10h at 50-100 DEG C, and obtaining the graphene film composite activated aluminum oxide adsorbent. Activated aluminum oxide is combined with the graphene; uncontrollability of a nanomaterial during subsequent treatment is avoided; a nano technology is creatively applied to the treatment of the heavy metal waste water, and the organic waste water that is high in toxicity, low in concentration and difficult to degrade; and adsorption rates are all above 97%.

The invention discloses a universal portrait photo cartoon stylizing method. The method specifically comprises the following steps: inputting an image S; carrying out cartoon region segmentation on the input image S; dividing the input image S into a portrait feature region A, a portrait non-feature region B and a background region C by using a semantic segmentation algorithm based on deep learning; performing five-sense-organ cartoon special effect algorithm processing on the portrait feature area A to obtain a graph E; carrying out selectable filter algorithm processing on the portrait non-feature area B to obtain a graph F; carrying out selectable filter algorithm processing on the background area C to obtain a graph G; and image fusion: combining the portrait feature area A in the image E, the portrait non-feature area B in the image F and the background area C in the image G to obtain a final effect image D. The beneficial effects of the method are that the method solves a problemthat the output resolution of a pure GAN network is too small; the method is high in universality, and effectively avoids the uncontrollability of the effect and the inconsistency of features.

The invention relates to the battery field, specifically to a nano-lithium iron phosphate material suitable for a high rate power battery and a preparation method thereof. The elements of the lithium iron phosphate satisfy the relation that: a doped element, lithium, iron and phosphorus are in a mole ratio of 0-0.05:1-1.15:1:1-1.15. The preparation method includes: taking an organic solvent as a dispersing agent, carrying out wet ball-milling, ultrafine grinding and vacuum drying to prepare a precursor, and conducting pretreatment, constant temperature treatment, crushing, sieving, and mechanical fusion. The product has high controllability, and compared with traditional lithium iron phosphate batteries, the rate performance, cycle performance, capacity and other electrical properties are greatly improved. The method greatly increases the industrialization possibility, and is of practical significance.

The invention relates to the technical field of cigarettes and food, and discloses a cigarette enriching the taste sense of the oral cavity. The cigarette comprises a cut tobacco section, a filtering section and an edible section. The edible section is prepared by wrapping rice paper around edible particles capable of nourishing the vitality and reinforcing the energy. According to the cigarette, the function area capable of being eaten is arranged, and the rice paper is adopted for guaranteeing the safety and sanitation of the edible particles. The limitation that merely flavors and fragrances are added into cut tobacco and a filter stick is broken through, the safety uncontrollability caused when the flavors and fragrances added into the cut tobacco generate substances after being combusted can be avoided, the technical limitation that ingredients the flavors and fragrances added into the cut tobacco and the filter stick can not be fully taken into the oral cavity by smoke is broken through, and a new idea and a new technical approach are provided for enriching the oral sense of the cigarette and expanding the special effect of the cigarette.

The invention provides a novel two-stage light-gas gun driven by high pressure air and belongs to the technical field of light-gas gun experiments. The novel two-stage light-gas gun mainly comprises asupport, a first-stage air chamber, a first-stage air chamber electromagnetic valve, a trigger electromagnetic ball valve, a second-stage air chamber, a large piston, a small piston, a launching pipe, an air release device and the like. A two-stage air chamber power source is adopted, the second-stage air chamber is divided into a large piston section and a small piston section, the two inside pistons are in rigid linkage, in the initial state, the first-stage air chamber and the small piston section of the second-stage air chamber are filled with high pressure air, storage and release of thehigh pressure air are controlled by the electromagnetic valve, and thus under the circumstance that initiating explosive devices, hydrogen and other flammable and explosive gases cannot be provided,superspeed flying of an object is achieved through air compression loading. The novel two-stage light-gas gun is safe and reliable, superspeed flying of the object is achieved with a compressed air method, experiment cost is low, and operation is safe, simple and convenient.

The invention discloses a processing method for a hard-tooth-surface big-modulus cylindrical rack. The processing method comprises the following steps: S1: forging, according to the structure of the semicircle rack, performing the overall forging by using a blank corresponding to two racks; S2: tooth slotting, performing the tooth slotting to two sides of a forge piece; S3: destressing processing;S4: semi-finish-milling tooth surface, performing the half finish-milling tooth surface to two sides of the forge piece, wherein the working allowance is kept on the tooth surface; S5: carburizing and quenching; S6: semi-finish-milling between two racks; S7: destressing processing; S8: finish-milling between two racks, enabling two racks to be separated; S9: finish turning; S10: external grinding, finishing a product at the end face; and S11: finish-milling tooth surface, finishing a product at the tooth surface. The processing of the hard-tooth-surface big-modulus cylindrical rack is realized by the above technology. The uncontrollability of the cylindrical asymmetrical surface heat treatment deformation is overcome, and a special heat treatment device and a special gear grinding machineare not needed, so the processing is more simple and economic.

The invention discloses a preparation method of a Maduro cigar coating. The preparation method comprises the following steps: (1) selecting raw materials; (2) killing insects at low temperature; (3) soaking handles; (4) conducting moisture regaining of hanging rods; (5) fermenting in a fermentation chamber; (6) carrying out natural fermentation; (7) classifying and grading. The sizes and weights of the selected raw materials are consistent as much as possible, so that the states of coatings in the technological process are the same, and the coatings are more uniform and consistent in color inthe fermentation process of the fermentation chamber; fermentation in the fermentation chamber is combined with natural fermentation, so that the energy consumption is reduced, the fermentation time is shortened, and the tobacco quality is improved; the products after fermentation are subjected to grading treatment, so that the subsequent product screening process is shortened, meanwhile, the products with poor products are subjected to secondary fermentation in the fermentation chamber, and the utilization rate of the products is increased.

A streaming media live broadcast method and system. The method includes: receiving a live broadcast request sent by a terminal, wherein the live broadcast request includes a push flow request or a pull flow request; and selecting a streaming media server that processes the live broadcast request from at least two streaming media servers, and forwarding the live broadcast request to the selected streaming server so as to enable the streaming server to provide a live broadcast service to the terminal according to the live broadcast request. The streaming media live broadcast method can ensure the robustness of the live broadcast while ensuring the security of the live broadcast.

The invention relates to the technical filed of wire and cable production equipment, especially to a horizontal winding taping integrated machine. The machine includes a machine base. The machine baseis provided with an untwisting machine, a horizontal winding machine, a pre-twisting machine, a double-end horizontal taping machine, an infrared baking box and a pickup single twister. The untwisting machine is used for performing first taping winding on wires. The horizontal winding machine is used for performing second taping winding on the wires wound by the untwisting machine. The pre-twisting machine is used for rotating the wires passing through the horizontal winding machine. The double-end horizontal taping machine is used for performing third taping winding on the wires passing through the pre-twisting machine. The infrared baking box is used for heating the wires passing through the double-end horizontal taping machine so as to make a third tap be heat-shrunk into shape. The pickup single twister is used for collecting the wires passing through the infrared baking box. The horizontal winding taping integrated machine can wrap a plurality of tapes around one line at the sametime so as to improve the armoring efficiency of the wires and improve the controllability of the wires in a winding taping process and the quality of the wires.

The invention relates to an ultrafine-size metal-PAN-based carbon fiber and a preparation method thereof. The preparation method comprises the steps that amine-oxime modified polyacrylonitrile fibersand a metal salt are subjected to a self-assembling reaction under a hydrothermal condition and then calcined under a reducing atmosphere to obtain ultrafine-size metal-PAN-based carbon fibers. The prepared ultrafine-size metal-PAN-based carbon fibers are composed of PAN-based carbon fibers, carbon nanotubes and metal nanoparticles with the surfaces coated with graphite layers; the carbon nanotubes are dispersed on the surfaces of the PAN-based carbon fibers, and the carbon nanotubes are staggered with each other to form a nano-mesoscopic-sized pore structure; and the metal nanoparticles of the surfaces coated with the graphite layers are limited in the ends of the carbon nanotubes, the metal nanoparticles are in a monodisperse state, are uniformly dispersed and are uniform in size, and the average particle size of the metal nanoparticle ranges from 5 nm to 20 nm. The ultrafine-size metal-PAN-based carbon fiber has strong adsorption performance, and the limiting effect of the carbon nanotubes on the metal nanoparticles avoids agglomeration among the metal nanoparticles.

The invention relates to an automatic heat sleeving assembly machine and belongs to the field of machining equipment. The automatic heat sleeving assembly machine comprises an electrical system, a mechanical system and a programmable logic controller (PLC) control system. The electrical system comprises a tool servo system, a heating servo system and a moving part control system and is controlled by the PLC control system. The mechanical system comprises a machine frame, a built-in control cabinet, a tool dividing device, a touch device and a high-frequency induction heating device, wherein the built-in control cabinet, the tool dividing device, the touch device and the high-frequency induction heating device are installed on the machine frame. The automatic heat sleeving tooling process is completed through the cooperation of the electrical system, the mechanical system and the PLC control system. According to the automatic heat sleeving assembly machine, high-frequency induction heating is adopted, so that resource waste and potential safety hazards caused by indirect heating are avoided; in addition, the automation degree of the whole tooling process is greatly improved, the qualified rate of products and the production efficiency are also improved, and labor consumption is reduced.

A damping valve includes a main valve opening and closing a main passage, and a pilot passage reducing a pressure of the upstream of the main passage by a throttle to guide as a back-pressure biasing the main valve to the closing direction. A pressure control valve being disposed on the downstream of the throttle and including a seating portion controlling the back-pressure, and a switching valve including a circular depressed portion opening and closing the pilot passage are integrated and controlled by a single solenoid. The damping valve includes fail passages being branched from the downstream of the throttle to bypass the main valve, and a fail valve opening and closing the fail passage. The switching valve is arranged on the upstream of the pressure control valve in the pilot passage. The fail passages are branched from the upstream of the switching valve of the pilot passage.

A high capacity polymer hydrogen storage material, including a linear high molecular polymer as a main chain. At least one side chain or a terminal group of the linear high molecular polymer is first aminated using a polyamine compound and then reacts with a borohydride to yield an ammonia borane derivative grafted to the side chain or the terminal group of the linear high molecular polymer.

The invention provides a method for optimizing the shape of an ion implantation region. The method includes the steps that a semiconductor device substrate with a grid is provided; original oxidization layers and nitration layers are sequentially deposited on the surface of the semiconductor device substrate, the top of the grid and the side walls of the grid; the nitration layer on the top of the grid and the nitration layer on the surface of the semiconductor device substrate are subjected to over etching so that side walls can be formed; etching by-products are formed on the original oxidization layers; the semiconductor device substrate is cleaned with a wet method, and the etched by-products change into residual oxide; the surfaces of the original oxidization layers with the residual oxide or the whole original oxidization layers with the residual oxide are removed, then, an oxidization layer is grown on the semiconductor device substrate so that a new oxidization layer can be formed, and the new oxidization layer can replace the original oxidization layer to serve as a buffer layer for subsequent ion implantation. According to the method, while the residual oxide can be effectively removed in a controllable mode, the ion implantation quality is further improved, the shape of a subsequent ion implantation region is optimized, the quality of devices is improved, and the yield of the devices is increased.

The invention discloses a limit mold for back lapping of an infrared focal plane detector and a preparation method. Uniformity and homogeneity of thicknesses of detector chips can be accurately controlled due to the special limit design of the limit mold, the limit mold is mainly made of two diamond pieces with very large hardness, the back lapping and polishing condition of the detector chips almost has no effect on the diamond pieces, rectangular holes are opened at the centers of the two diamond pieces through a laser according to the feature size of the detector and the mold is divided into two portions along the diagonals of the rectangular holes through Disco cutting, and special DW3 low-temperature gum is used for bonding and curing the two layers. According to the limit mold, raw materials are simple and easy to obtain, accurate thickness control is provided, the technological process is controllable, the operation processes are few, and the mold can be recycled and has wide applicability.

The invention discloses a power supply system of an air energy water heater. The power supply system comprises a first controllable switch assembly, a master control panel control module, a solar cell module, a second controllable switch assembly and a voltage comparison circuit, wherein the master control panel control module comprises an internal voltage conversion circuit and a master control chip and is used for converting the input alternating current to output a first direct-current power supply to the power supply end of the master control chip when the first controllable switch assembly is in closed state; the solar cell module is used for outputting a second direct current power supply; when the air energy water heater is in the standby mode, the voltage comparison circuit controls the second controllable switch assembly to close and control the first controllable switch assembly to disconnect when judging that the voltage of the second direct current power supply is greater than or equal to a reference voltage. The power supply system can be used for supplying power by the solar cell module when the air energy water heater is in the standby mode, so that the standby power consumption of the air energy water heater is reduced and the failure rate of the air energy water heater is reduced at the same time. The invention further discloses a control method of the power supply system of the air energy water heater.