82 results about "Atomic energy" patented technology

The invention discloses a high-electric conductivity aromatic polymer ionic liquid diaphragm material and a preparation method thereof. The high-conductivity aromatic polymer ionic liquid diaphragm material comprises an cation and an anion, wherein the cation is a composite cation formed by combining at least one ion of hydrogen ions or metal ions with organic molecules; and the anion is a fluorine-contained sulfonic acid anion or a fluorine-contained sulfimide anion which is connected to an aromatic benzene ring-contained polymer side chain. Compared with the prior art, the polymer ionic liquid diaphragm material of the invention has the advantages of difficult loss of ionic liquid, electric conductivity without depending on water, penetration resistance of OH-anion, methanol or vanadium ions, and the like, can form a stable ion channel which has high ionic activity, high chemical stability, low ion activating energy and easy adsorption of organic polar solvents and is an ideal diaphragm material which can be applied to various fields of lithium ion batteries, secondary lithium ion batteries, methanol fuel batteries, liquid flow batteries, electrodialysis water treatment, atomic energy industry and analysis, catalytic synthesis, chlor-alkali industry, and the like.

The invention relates to a fullerene molecular gyroscope which is characterized in that: atoms or molecules are embedded in the fullerene, so as to prevent spin collision exchange relaxation and spin collision damage. The micro-crystallizing standard solid molding is adopted, so that the fullerene molecules are arrayed according to a certain structure and the sensitive atomic density is increased. An optical and microwave method is adopted for controlling and detecting the atomic energy level, so that the detection for a dead axle and an inertia signal of the atoms or molecules in an inertia space is realized. The fullerene molecular gyroscope has the advantages of high sensitivity and excellent heat stability and has an important value for developing a new generation solid gyroscope based on an atomic spin effect and with high precision, high stability and small volume.

A modularized atomic energy microscope is disclosed, comprising seven modules. The first one is stepper motor the second is sample support with four-dimensional adjustment fixed on stepper motor, the third is z direction scanner, the fourth consists of microbracket needle point and focusing lens, the fifth is xy direction scanner, the sixth consists of semiconductor laser with focusing lens, reflector, imaging lens and four-quadrant photoelectric sensor, the seventh consists of optical microscope, CCD camera, monitor. The invention has convenient adjustment and replacement to modularized atomic energy microscope, and using each module to construct atomic energy microscope with different structure is easy and sample has function of coarse positioning.

The invention provides a method and device for improving the microwave electric field intensity measurement signal-to-noise ratio through Zeeman frequency modulation. The method comprises the following steps: the frequency of coupling light is locked on the resonance transition of the intermediate state and the Rydberg state 1; the microwave frequency is locked on the resonance transition of the Rydberg state 1 and the Rydberg state 2, the frequency of the detection light is scanned near the resonance transition frequency of the ground state and the intermediate state, and the spectrum of thedetection light after penetrating through an atom pool is measured so as to obtain the spectrum of the AT split signal of the Rydberg electromagnetic induction transparency EIT; the position of the atomic energy level of the sample is modulated by using an alternating-current magnetic field, and frequency modulation is performed on the spectrum; and the spectrum of the AT split signal of the Rydberg electromagnetic induction transparent EIT is demodulated to obtain a dispersive frequency discrimination signal of the EIT-AT split spectrum. According to the method and device, the atomic energy level is modulated through the alternating magnetic field, frequency modulation is equivalent to spectrum frequency modulation, the problem of residual amplitude does not exist naturally, and meanwhilean experiment system is simpler and more convenient.

The invention relates to a measuring device and method for radio frequency line transmission factors based on atomic energy levels. The invention aims to solve the technical problems of big measurement error and complex calibration processes in a conventional radio frequency line transmission factor measuring process. The method comprises the steps that alkali metal atoms generate an EIT spectrum by the action of two laser light sources; the EIT spectrum forms intersecting points of spectral lines by the action of a radio frequency electric field; a voltage value Vo, i of a radio frequency source is read and the electric field intensity value corresponding to one spectral line intersecting point is calculated according to Eo, i=Vo, i / d (d is the distance between parallel electrodes); the value is compared with a theoretical electric field value Ei to obtain a radio frequency line transmission factor ti=Ei / Eo, I corresponding to the intersecting point; by computing the average of the tis of different spectral line intersecting points, the precision of the radio frequency line transmission factor t can be further improved. Self-calibration measurement based on an atomic energy level structure is achieved; measurement does not require external equipment and is free from influence of external environment; the method is simple to implement.

The invention discloses an ionizing-radiation-preventive composite material and a preparation method thereof. In the ionizing-radiation-preventive composite material, basalt fiber is high in content of heavy-nucleus elements like iron and manganese, and the heavy-nucleus elements improve absorbing and scattering effect on high-energy ionizing radiation of the basalt fiber, so that compared with other reinforced fiber, the basalt fiber has better ray shielding performance; due to special atomic energy level, rare earth oxide has strong photoelectric absorbing effect on rays of 10-80 keV, and weak absorbing area that the heavy-nucleus elements have within the range can be filled up, so that shielding performance of the basalt fiber composite material on wide-energy-range rays is improved remarkably. The rare earth oxide, a resin matrix and the basalt fiber mutually cooperate and mutually act, so that the ionizing-radiation-preventive composite material has good radiation-preventive performance and mechanical performance.

The invention relates to a control method for force feedback of an electro-hydraulic servo remote control manipulator of multiple degrees of freedom, which can be widely used for space exploration, ocean development, application of atomic energy, military field, emergency rescue and the like to do tasks in dangerous or hostile environment instead of people. According to the method, the feedback force is generated by master-slave end joint space angle deviation, the feedback force gain is generated by a multi-dimensional constrained space formed by a jacobi matrix and a space matrix of redundant degree of freedom, and a position space, which is the same as that on the slave side, is formed on the master side, so that a remote control operator can understand operation counter force and force sense which is caused by interference in the position space on the master side. According to the method, the position space constraint which is the same as that on the slave side is established on the master side, so that the operator can know the interference on the slave side through the force, direction and interference degree of freedom to actually have force presence.

An aromatic polyamide / aromatic polyimide blended fiber contains aromatic polyamide and aromatic polyimide, the tensile strength of the aromatic polyamide / aromatic polyimide blended fiber is 4.5-5.0 GPa, the tensile modulus is 142-160 GPa, and the retention rate of the tensile strength of the aromatic polyamide / aromatic polyimide blended fiber is larger than 95% after illuminated by an ultraviolet lamp for 100h. The invention further discloses a preparation method of the aromatic polyamide / aromatic polyimide blended fiber. Synthesized polymer spinning solution is high in blending compatibility and cannot be separated in the process of deaeration and spinning and the like, corresponding support is provided so that the aromatic polyamide and the aromatic polyimide can better exert a synergistic effect and demonstrate excellent performance in the blended fiber, and the high-strength high-modulus highly-ultraviolet-resistant fiber which has high mechanical strength of an aromatic polyamide fiber and high ultraviolet resistance of a polyimide fiber is obtained, and the aromatic polyamide / aromatic polyimide blended fiber can be widely applied to aeronautics and astronautics and the atomic energy industry, and in particular to the complex environments of near space fields and the like where ozone concentration is high and ultraviolet radiation is severe.

The invention discloses a method for predicting bundle vibration of a large low-temperature evaporator under the two-phase flow effect. 'whether bundle vibration caused by periodical vortex shedding can occur' is predicted by calculating the maximum amplitude of a heat exchange tube under the condition of simply supported boundary according to the maximum amplitude, meanwhile 'whether bundle vibration caused by turbulence excitation vibration can occur' is predicted by calculating the vibration amplitude of a first vibration mode according to the vibration amplitude, and 'whether bundle vibration caused by instability of fluid elasticity can occur' is predicted by calculating critical cross flow velocity according to flow velocity in a pipe gap of two-phase fluid and the critical cross flow velocity. The method for predicting bundle vibration of the large low-temperature evaporator under the two-phase flow effect can be used for analyzing and calculating vibration of the device bundle of shell-and-tube heat exchangers of a condenser, an evaporator, an atomic energy evaporator and the like under the two-phase flow operation.

The invention discloses a novel impurity extraction method of a caprolactam device. The impurity extraction method is characterized by firstly introducing caprolactam-containing wastewater into a tower type extraction device, and extracting and separating with benzene; secondly introducing the residual liquid after extraction of the tower type extraction device into a centrifugal extraction device for deep extraction; and finally introducing the wastewater rich in water-soluble impurities after extraction into a gas stripping tower. The impurity extraction method disclosed by the invention can effectively solve the problem that the extraction effect is not good in the prior art and achieve the purpose of deep extraction, and is suitable for liquid-liquid solvent extraction in the fields of atomic energy chemical industry, pharmacy, hydrometallurgy, petrochemical industry and the like.

The invention discloses a microcrystalline graphite purification preparation process which comprises the following steps: adding 40-50 parts by weight of natural microcrystalline graphite of which the granularity is 200-3000 meshes and the purity is 80-90% into 30-42 parts by weight of pure water which is free of impurity ions such as Ca<2+>, Mg<2+> and CL<->, uniformly stirring till paste is formed, further adding 4-8 parts by weight of strong acid, heating to 40-100 DEG C, performing stirring reaction for 4-6 hours, filtering, washing filter cakes with water till the pH value is neutral, and drying, thereby obtaining the natural graphite of which the purity is greater than or equal to 99.990%. The high-purity natural graphite which is 99.990-99.998% after being purified according to a liquid-phase chemical method can meet use requirements of high-tech fields such as the atomic energy industry and the space technology, and is low in cost and stable in quality.

Computing units are determined for performing molecular docking calculations in parallel with the number of computing units and the width of the data paths allocated by relative complexity of operations. Data can be expected to arrive at downstream computing units as it is needed, leading to higher utilization of computing units. Computing units are hardware components that are specific to a calculation performed. For molecular docking calculations, functions of molecular subsets or of combinations of molecular subsets are calculated. Determinations include fit between molecular subsets, affinity or energy of “fit” between molecular subsets, etc. Affinity might include inter-atomic energy, bond energy, energy of atoms immersed in a field, etc. The calculations could be used to simulate and / or estimate likelihoods of molecular interactions.

The invention belongs to the technical field of wet-process zirconium and hafnium metallurgy, and particularly relates to a preparation method for atomic energy level hafnium dioxide. According to themethod, P204 is adopted as an extraction agent to extract and enrich hafnium in raffinate, the concentration of the hafnium in the enriched hafnium solution can be improved by 20-30 times, the consumption of caustic soda for precipitation is obviously reduced, and a precipitation mother solution can return to prepare a stripping agent; hafnium-extracted raffinate water can return to a zirconium and hafnium separation system for recycling or for producing a sodium nitrate product; the color of the produced hafnium dioxide is white, and the total impurity content conforms to the atomic energy level hafnium dioxide quality standard; and compared with direct precipitation of the raffinate, the preparation method has the advantages that the waste water amount is reduced by 60% or above, the raffinate can be recycled, the consumption of the caustic soda is reduced by 85% or above, the production cost is low, the product quality of the hafnium dioxide is stable, and obvious social benefits and obvious economic benefits are achieved.

An emergency reactor core cooling system is provided with at least four dynamic safety sections each equipped with an electrically-driven dynamic safety system, and at least one static safety section equipped with a static safety system that does not require to be electrically driven. The number of dynamic safety sections is equal to or greater than the number of dynamic safety sections needed during a design basis accident by two and each dynamic safety section is provided with one electrically-driven dynamic safety system. The static safety system is capable of cooling the reactor core without being re-supplied with cooling water from the outside during the time needed for the dynamic safety system subjected to online maintenance to recover when supposing that an accident occurred during online maintenance of one dynamic safety system. An emergency reactor core cooling system for a boiling-water nuclear power plant, wherein it is possible to reduce the size of an emergency power source and the number of electrically-driven systems, and to prevent a plurality of systems from losing the function thereof caused by an auxiliary cooling system losing the function thereof.

The invention relates to a polyether sulphone material containing a phenoxy aliphatic chain boric acid ester side chain and a preparation method of the material, belonging to the technical filed of high polymer materials. The polyether sulphone material containing the phenoxy aliphatic chain boric acid ester side chain is a polymer containing a polyether sulphone main chain and a phenoxy aliphatic chain boric acid pinacol ester side chain, polyether sulphone containing a phenoxy allyl side chain is obtained through a reaction between polyether sulphone containing a phenol lateral group and allyl bromide, and under the catalysis of [Ir(COD)Cl]2 and dppe (dipalmitoylphosphatidylcholine), the polyether sulphone containing the phenoxy allyl side chain and pinacol ester borane react so as to prepare the polyether sulphone material containing the phenoxy aliphatic chain boric acid ester side chain. The preparation method is simple to operate, high in reaction efficiency and suitable for polyarylether systems; the prepared polymer has the properties of an aroma main chain and an aliphatic series boric acid ester side chain and heat stability; and a boracic material is an important neutron absorbing material and a reaction intermediate, and has potential application in an atomic energy industry shielding material and preparation of crosslinking polyether sulphone resin.

The invention relates to the technical field of atomic clocks, and discloses a fountain type cold atomic clock. On one hand, an atomic energy state selection mechanism is changed into an optical pumping state selection mechanism, an atomic state selection structure and a fluorescence detection structure can be combined into one, and then a state selection microwave cavity structure commonly used for the fountain type cold atomic clock can be removed, so that the overall height of a physical system structure is greatly reduced, the size and the weight of the atomic clock are effectively reduced, and movement, popularization and use are facilitated; and on the other hand, due to the fact that the atomic utilization rate is greatly improved through the optical pumping state selection, the number of atoms used for microwave inquiry is multiplied, the signal-to-noise ratio of a spectral line is increased, then the index influence caused by the fact that the line width of the spectral line is increased due to height reduction is counteracted, the index potential of the accuracy and the stability is equivalent to that of a current fountain type cold atomic clock, and the performance of the atomic clock cannot be affected due to height reduction.

The present invention relates to a method for removing cesium in a clay mineral using hydrogen peroxide. According to the present invention, cesium in a clay mineral is removed using hydrogen peroxide, which serves to induce interlayer expansion of the clay mineral to allow a cation to easily enter an interlayer of the clay mineral, and thus cesium desorption efficiency can be further improved. Also, the method according to the present invention can be efficiently used to restore soil in residential areas widely contaminated with a radionuclide when a major accident such as Fukushima nuclear accident occurs as well as various sites of atomic energy facilities contaminated with a radionuclide. Also, since radiation-contaminated soil is treated with only hydrogen peroxide and cations, secondary environmental pollution caused by wastes can be significantly reduce and the waste disposing cost can also be saved.

The invention belongs to the technical field of surgical knife machining die jigs, and particularly relates to a surgical knife handle welding clamp. According to the surgical knife handle welding clamp, rare earth elements are added, high-content Mg is adopted, a trace amount of Ti is added for refining the structure, and the mechanical performance of an alloy is improved. Cu can be used for forming a strengthening phase CuAl2 and can also be used for forming a high-temperature strengthening phase CuMgAl2 with Mg, and tenacity of the alloy is improved; the quenching sensitivity of the alloy can be improved through Zr, Mn and Cr, a fiber structure in the alloy can be maintained at a very high level through Mn and Zr, particles can be refined through Cr, and the fiber structure is retained; Mg2Si particles and grains can be refined through Cu and Fe, and Si atoms leave the grain boundary; atomic energy of lanthanide loses valence electrons, and a +3 valent stable compound can be formed; and through combination of Nd and Y, the temperature resistance is improved to a greater degree, and meanwhile plasticity and tenacity can be improved through Y.

The invention relates to the technical field of atomic energy level transition detection, and discloses a method for reducing an atomic energy level transition dynamic detection frequency range of an atomic clock. The method comprises the steps that deviation correcting voltage is sent to a signal generator, reference voltage is sent to a voltage control crystal oscillator, the signal generator outputs a signal to an integrated module of the atomic clock, the voltage control crystal oscillator outputs a signal to a microwave multiplying mixing module of the atomic clock, and atomic clock general loop closing working is conducted. According to the method for reducing the atomic energy level transition dynamic detection frequency range of the atomic clock, the atomic energy level transition dynamic detection frequency range of the atomic clock is reduced, and therefore accuracy of atomic energy level transition dynamic detection of the whole atomic clock is improved.

The invention discloses a high-voltage power frequency voltage measurement method and device based on the Stark effect. The method includes the following steps: S1, setting m sensors for measuring theelectric field intensity of corresponding height according to the Stark effect in a line space with a height of x from the ground, and measuring the electric field values Esn corresponding to the sensors Sn; S2, calculating the average electric field value Ex according to the electric field values Esn; S3, selecting a number of height values Xi in the vertical direction of a transmission line, and calculating the measured electric field intensity values Exi corresponding to different height values according to the average electric field value Ex; and S4, calculating the voltage of the transmission line according to the measured electric field intensity values Exi. According to the invention, the spatial electric field intensity is measured by using cesium atoms excited to a high Rydberg state and utilizing the Stark effect of Rydberg atoms producing energy level splitting under the action of an external electric field according to the relationship between the degree of atomic energy level splitting and the intensity of the external electric field. High-voltage power frequency measurement of a transmission line and substation environment is realized. Non-contact voltage measurementis realized based on the method.

The invention discloses a frequency locking system and method based on the Rydberg electromagnetic induction transparent signal. The system includes a probe light source, a coupling light source, a rubidium vapor cell, a photodetector, a sinusoidal signal source, a signal amplifier, a lock-in amplifier and a proportional-integral-integral controller; and the frequency locking method uses a coupledlight source to scan the frequency of the coupled light passing through the rubidium vapor cell to obtain a Rydberg electromagnetic induction transparent signal, and adopts an alternating magnetic field to modulate the atomic energy level to achieve the frequency modulation of the Rydberg electromagnetic induction transparent signal so as to obtain the differential signal of the Rydberg electromagnetic induction transparent signal, namely the error signals required by frequency locking, and the frequency locking for the coupled light laser is performed. The system and method provided by the invention are wide in application range, narrow in line width, simple and stable in structure, low in environmental requirement and low in cost, and are suitable for development of portable systems.

The present invention relates to an irradiation device for material test using a gamma ray radiated from a spent nuclear fuel assembly and provides the irradiation device for material test using a gamma ray radiated from a spent nuclear fuel assembly wherein an irradiation device for material test to achieve a radiation effect evaluation is manufactured to be movable upward, downward and horizontally in order to study the hardening phenomenon of the frail materials to the radiation among the atomic power facilities using a gamma ray radiated from a spent nuclear fuel assembly, thereby it is possible to adjust a position of the spent nuclear fuel used for material test using a gamma ray radiated from a spent nuclear fuel and a test material, identify a distance between the spent nuclear fuel and the test material easily with a scale and evaluate the radiation effects on the materials used at facilities handling a spent nuclear fuel under the same situation as they are really exposed. Further the present invention comprises a support constructed vertically; a vertical moving table which is capable of moving upward and downward connected with a proper position of the support; a moving device for moving said vertical moving table upward and downward; a horizontal moving table which is capable of moving horizontally placed on the vertical moving table; a horizontal moving bar which is capable of moving horizontally placed on the vertical moving table; and a driving device for driving the horizontal moving table and the horizontal moving bar horizontally.

The embodiment of the invention provides a capability opening system and a click-to-dial service capability opening method, and the system comprises a capability engine layer module, a capability convergence layer module, and an operation support layer module. The capability engine layer module is used for providing various native O-domain capabilities and B-domain capabilities which are screenedand subjected to interface adaptation; the capability convergence layer module is used for carrying out capability encapsulation and interface protocol adaptation on the provided O-domain capability and B-domain capability respectively so as to be abstracted into atomic energy power and open the atomic energy power to a user through an API interface; and the operation support layer module is usedfor carrying out capability operation management on atomic energy abstracted after capability packaging and interface adaptation, and carrying out operation and maintenance management on the system. According to the embodiment of the invention, independent chimney type open architecture of other operators is broken through, desensitization processing is carried out on user data when the capabilityof the O domain + B domain is combined with combined sales, more practical capability is provided for developers, and the value of the core capability is maximized.

The invention discloses a novel voltage transformer based on a Rydberg atom Stark effect. The novel voltage transformer comprises a primary wiring terminal and a sensing probe; the sensing probe comprises a primary high-voltage electrode plate, a ground electrode plate and a Rydberg atom air chamber; the primary wiring terminal and the primary high-voltage electrode plate are connected to introduce the high-voltage line voltage; and through the introduced high-voltage line voltage, the electric field intensity between the primary high-voltage electrode plate and the ground electrode plate is measured in the Rydberg atom air chamber based on the Stark effect, and the voltage value is measured. A voltage measuring method based on the principle of the Rydberg atom Stark effect can be traced back to fundamental physical quantities such as atomic energy level, the measuring precision of the novel voltage transformer is improved greatly, and the measuring error is obviously lowered comparedwith that of a traditional transformer; and compared with the traditional electromagnetic voltage transformer, an iron core and a secondary winding are not included, the characteristics of small sizeand low weight are achieved, miniaturization is easy, and meanwhile limitation of magnetic saturation is also avoided.

The invention discloses a method for achieving atomic energy level four-wave mixing spatial displacement and division measurement. According to the method, laser pulse signals generated by a laser device are processed, and lasers with wave length being 532 nm are obtained and are divided into two beams which are used as pumping sources of two dye laser devices; a laser beam generated by one dye laser device passes through an optical device to form a light beam k1, a light beam k3 and a light beam k1', wherein the light beam k1' is in the same direction as the light beam k1, and a small included angle is formed between the light beam k1' and the light beam k1; a laser beam generated by the other dye laser device passes through the optical device to form a light beam k2 and a light beam k2', wherein the beam propagation direction of the light beam k2 coincides with that of the light beam k1, and an included angel is formed between the light beam k2' and the light beam k1; The light beams k1, k1', k2, k2' and k3 are converged to a sample pool, and two horizontal polarization four-wave mixing signals kF1 and kF2 are generated; interference experiment graphs of the four-wave mixing signals kF1 and kF2 and a detection signal k3 are measured, and therefore four-wave mixing spatial displacement and division measurement can be conducted. The method for achieving atomic energy level four-wave mixing spatial displacement and division measurement is suitable for four-wave mixing signals of open five-level systems of the types such as a cascade three-level type, a Y-type four-level type and a Y-type three-level type in an atom system.

A method for stabilize and integrating frequency of atomic dichroism laser the fixed magnetic field required for the frequency stabilization technique based on the atomic dichroism laser is provided by the external magnetic field of the optical isolator. The permanent magnet or energized coil and the power supply and control circuits which provide the required magnetic field environment in the original system are omitted, the external magnetic field of the optical isolator is effectively utilized, and the device of laser frequency stabilization based on DAVLL is simplified. In this method, theatomic gas chamber is placed on one side of the optical isolator, and the magnetic field required for DAVLL is supplied by the optical isolator, which splits and shifts the atomic energy level in theatomic gas chamber due to Zeeman effect, so that the laser frequency stabilization based on DAVLL is realized. The invention reduces the device number of the laser frequency stabilization device based on DAVLL, reduces the volume of the device, and improves the integration level of the device.

The invention provides an atomic energy spectrum measurement system and measurement method. The measurement system comprises a plasma generator, a collimation unit, an electronic gun, a collection unit and a measurement unit, wherein the plasma generator is used for generating plasmas, and the plasmas pass through a neutralized board to generate an atomic beam; the collimation unit is used for collimating the atomic beam; the electronic gun is used for emitting an electronic beam of nanosecond pulse width to enable the electronic beam to bombard the collimated atomic beam, and the atomic beamis ionized into ions; the collection unit is used for collecting the ions; and the measurement unit is used for carrying out measurement to obtain the current-time signal of the collection unit, and obtaining the energy spectrum information of the atomic beam according to the current-time signal. In the measurement system, the electronic beam of the nanosecond pulse width is used as an ionizationsource. Since electron and ion generation time is short, the plasmas can not be formed on the receiving port of the collection unit in time, so that the space potential and the sheath of the plasma can not be generated, and therefore, atomic energy spectrum measurement accuracy is improved.

An electromagnetic wave connection heating device is high-efficient, energy-saving, zero-carbon, non-combustible and environmentally friendly, Reliable and low manufacturing cost, Small operating costs and is powered by a power supply: The mains power supply is supplied by electricity stored in batteries generated by solar or wind or hydro or atomic energy, the pulse waveform calibration frequencyconversion amplifier and the high-order harmonic absorber make it more environmentally friendly, the unique and innovative structure of the excitation coil, smart combination of multiple heating elements, As that actual effective heat area of the device can be greatly enlarged, high-efficiency and energy-saving can be achieve, A Quantum Detection Controller for Magnetic Saturation of Electromagnetic Fields: FPGA quantum transform data acquisition, quantum all-optical fiber and quantum interference sensors, It can be used in instant bath, residential central heating boiler and water heater inwinter, industrial steam boiler, large-scale boiler in thermal power plant, many kinds of ovens and fast steaming food stove in canteen, and so on.