85results about How to "Make up for loss" patented technology

The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis. The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement. By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged.

The invention relates to a method for removing organic pollutants from water by drinking water enhanced treatment, which comprises the following steps: adding an oxidizing chemical medicament in water to be treated for reaction for 0.5 to 10 minutes and filtering the water by using a modified granular filter medium filter bed, wherein 0.2 to 5 milligrams of chemical medicine is added into each litter of water to be treated; and filtering a granular filter medium by using quartz sand, zeolite, cordierite, ceramic grains and other filter beds undergoing surface modification by oxides of metals such as iron, manganese and aluminum, wherein before filtration, the oxidizing mixed medicine at a certain concentration is added into water to be filtered, natural organic substances and micro organic pollutants in water can be removed effectively when the water staying in the filter bed for a certain period flows out of the filter bed, and at the same time, the added medicament does not penetrate a filtering layer. The method can remove natural organics in water, in particular persistent micro organic pollutants that generally cannot be removed quickly by the oxidation by potassium permanganate, ozone and hydrogen peroxide, at high speed with high removal rate and small residual amount, and thus is an economic and high-efficient organic pollutant removing method.

The invention discloses a cable fault detection and analysis method. According to the method, an impedance frequency spectrum and a phase frequency spectrum of a cable are taken as basis, subsection characteristic impedance on an impedance frequency spectrum attenuation trend curve is calculated with a subsection interception method, an equation of equivalent impedance is established, R, L, G and C parameters of cable transmission impedance are calculated, a transmission impedance model based on R, L, G and C parameters is obtained, an error distance graph with a cable distance length serving as a variable is obtained through error calculation and comparison of the transmission impedance model and the tested impedance frequency spectrum and phase frequency spectrum, finally, local zero points on the error distance graph are analyzed, and fault detection and fault type identification are realized. Compared with the prior art, on the basis of a relative signal transmission rate calculation method with low calculation difficulty and high calculation accuracy, accurate fault positioning and multi-point fault positioning can be realized, and the fault type identification can be realized.

The invention discloses an asphalt road crack image segmentation method based on a generative adversarial network. U-Net, CU-Net and FU-Net networks are used as a generator model G for generating an adversarial GAN models; GUNet, CUNet and FUNet contained in the generator model are respectively combined with three same binary classification network discriminator models D (Discriminative) to form UGAN, CUGAN and FUGAN models; mutual iteration competition optimization training is carried out through a generator and a discriminator, and finally trained generator model U-Net, CU-Net and FU-Net areused as crack image divider; U-Net, CU-Net and FU-Net models realize the image segmentation of the crack of the complex asphalt road. Compared with the prior art, the required training data set is less, the crack segmentation precision is higher, and the precision ratio and recall ratio are higher.

The invention provides a method for reducing difference of the two sides of paper. The paper is designed to be of a multilayer fiber layer structure; the pulp preparing and beating of each fiber layer are realized independently; a pulp material enters a paper machine with multiple independent flow channels, and is formed in forming areas through simultaneous stacking and paper manufacturing with pulp, wherein the content of fine fibers of which diameters are smaller than 1 micron in the pulp material I entering a flow channel closely adjacent to a forming net is higher than that of fine fibers of pulp material in other layers, and preferably, the content of the fine fibers in the pulp material I is 5-10% higher than that of the fine fibers of the pulp material in other layers. The invention further provides the paper which has low two-side difference, and is prepared by the method, in particular to a glass fiber paper with low two-side difference as well as a coalescent filter element comprising the glass fiber paper with low two-side difference. According to the glass fiber paper with low two-side difference, provided by the invention, the density of fibers in the paper thickness direction is uniform, so that the efficiency and a separation capability of the coalescent filter element can be remarkably improved.

The invention discloses a novel magnetizing fluid seal device. The novel magnetizing fluid seal device comprises permanent magnets, annular magnet poles and a magnetic conduction shaft cover, wherein the magnetic conduction shaft cover is sleeved with a main shaft, the annular magnet poles are connected with the magnetic conduction shaft cover in a sleeved mode, magnetizing fluid is filled in the clearance spaces between the annular magnet poles and the magnetic conduction shaft cover, the annular magnet poles are multiple, a permanent magnet is arranged between two adjacent annular magnet poles, an added magnetizing fluid device is arranged on each annular magnet poles in a matched mode, and each added magnetizing fluid device is provided with the corresponding magnetizing fluid inside. The novel magnetizing fluid seal device is simple in structure, and easy to manufacture. Further, no complex parts are required and the requirements for the shaft surface quality and clearance processing are not high. The novel magnetizing fluid seal device can realize zero leakage as long as under the tolerant pressure differential range due to the fact that the seal is formed by a fluid, and therefore the seal for an extremely toxic substance, a combustible substance, an explosive substance, a radioactive substance and particularly a precious substance and a substance with high purity can be realized.

The invention provides a heating furnace of an annular component. A first guide partition plate, a second guide partition plate and a third guide partition plate are sequentially arranged inside a furnace body from top to bottom; a first airflow passage, a second airflow passage, a third airflow passage and a fourth airflow passage are sequentially formed between the top inner wall of the furnace body and the first guide partition plate, between the first guide partition plate and the second guide partition plate, between the second guide partition plate and the third guide partition plate and between the third guide partition plate and the bottom inner wall of the furnace body; airflow heating accelerators are arranged inside the second airflow passage and the fourth airflow passage; a first centrifugal impeller is arranged between the first guide partition plate and the second guide partition plate; a fifth airflow passage is formed by the upper and lower surfaces and the outer side wall of the annular component, and the top and bottom inner walls and the inner side wall of the furnace body; the first centrifugal impeller drives a gas to flow in circulating manner; the gas enters the second airflow passage from the air outlet of the first centrifugal impeller, hits against the inner side wall of the annular component after passing through the airflow heating accelerators, sequentially flows through the third airflow passage, the fourth airflow passage, the fifth airflow passage and the first airflow passage, and then enters the air inlet of the first centrifugal impeller. According to the heating furnace, the annular component can be specifically heated, and the energy consumption is relatively low.

The invention relates to an AC permanent magnet gain transformation device and a voltage regulating and control method thereof. The device adopts the structure that a permanent magnet or a permanent magnet component is additionally arranged in a traditional transformer structure, the magnetic pole face of the permanent magnet is clung to a lamination iron core so as to ensure that inherent permanent magnetic potential of the permanent magnet can be led out under the excitation of excitation current of a primary winding, and is stacked and compounded with the excitation magnetic potential in a closed-loop lamination iron core master magnetic circuit, and as a result, at the output end of the secondary winding, the induced electromotive force stacked by the excitation magnetic flux and the permanent magnet magnetic flux can be inducted. The voltage regulating and control method comprises the following steps: inputting the impulse current of certain amplitude value into the primary winding to ensure that a compounded excitation effect can be generated; changing the pulse count of the impulse current in unit time so as to change and regulate the input and output power of the AC permanent magnet gain transformation device. According to the invention, the power transmission efficiency of the transformation device is further improved, and inherent depletion of the traditional coil winding and the lamination iron core is compensated, and the energy is saved.

A cascading distributed fiber Raman temperature measuring system comprises a broadband light source, a bidirectional three-channel fiber coupler, a single-mode fiber, an optical relay amplifier, an optical splitter, a first photoelectric receiver, a second photoelectric receiver, a signal acquisition card and a computer. The cascading distributed fiber Raman temperature measuring system is mainly used for measuring temperature of power transmission and distribution systems, oil well exploration, gas pipeline systems and the like, and can adapt to various measurement environments by adjustment as required during use. The cascading distributed fiber Raman temperature measuring system has the advantages of safety, reliability, high weather resistance, wide application range, long transmission distance and high electromagnetic resistance.

The invention relates to a preparation method of health-preserving pomegranate tea. The preparation method comprises the steps: picking of raw materials, withering, killing out, rolling and drying. The health-preserving pomegranate tea prepared by the method contains tea polyphenols, caffeine, lipopolysaccharide, theanine and other components closely related to human health, has the pharmacological actions of refreshing, clearing away heart-fire, clearing away summer heat, promoting digestion, resolving phlegm, removing greasiness, reducing weight, relieving restlessness, detoxicating, dispelling the effects of alcohol, promoting production of body fluid, quenching thirst, reducing pathogenic fire, improving eyesight, relieving dysentery, dehumidifying and the like, and also has certain pharmacological effects on modern diseases such as radiation sickness, cardiovascular and cerebrovascular diseases and cancer, so the health-preserving pomegranate tea is health-preserving and health care green tea capable of helping digestion, promoting absorption of nutrient components, preventing and treating peptic ulcer, reducing cholesterol and preventing and treating aged diseases.

The invention provides a communication method. The downlink communication operation of the communication method includes: an optical network unit receives an optical signal sent from an optical line terminal, and converts the optical signal into a digital signal, and sends the digital signal to a head end device; the head end device receives the digital signal and converts the digital signal into a carrier signal and sends the carrier signal to a repeater device; the repeater device receives the carrier signal sent from the head end device, and performs gain for the carrier signal, and sends the carrier signal after gain to a terminal device; and the terminal device receives the carrier signal, sent from the repeater device, after gain, and converts the carrier signal after gain into a digital signal, and sends the digital signal to a first user terminal.

The invention discloses health-care flour for diabetes patients. The health-care flour is prepared from the following dry raw materials in parts by weight: 100-400 parts of wheat flour, 20-50 parts of tartary buckwheat flour, 20-50 parts of rice flour, 20-50 parts of potatoes, 10-30 parts of Chinese yam, 1-10 parts of bitter gourds, 5-10 parts of soybeans, 5-10 parts of tea leaves, 2-5 parts of black funguses, 2-5 parts of pumpkins, 0.1-1 part of folic acids, 0.1-1 part of vitamin B12, 1-5 parts of astragalus membranaceus, 1-3 parts of ginseng, 1-3 parts of lotus seed cores, 1-3 parts of endothelium corneum gigeriae galli, 1-3 parts of white funguses, and 2-10 parts of radix puerariae. The invention also discloses a preparation method. The health-care flour disclosed by the invention is prepared through scientific nutrient compounding ratios, and the folic acids and the vitamin B12 are added into the flour, so that the loss of such vitamin can be made up in the processing course of the flour on the basis that the taste of the flour is not changed; and the tartary buckwheat which is added is matched with the Chinese yam, so that the problem that the mouth feel of the tartary buckwheat is poor is better solved.

The invention discloses a self-learning image super-resolution reconstruction method and system based on a convolutional neural network. The method comprises the steps of 1, obtaining a training sample of a to-be-reconstructed image; 2, constructing a convolutional neural network; the convolutional neural network comprises a feature extraction unit, a feature enhancement unit, a residual error unit and a reconstruction unit. 3, training the convolutional neural network constructed in the step 2 based on the training sample obtained in the step 1 to obtain a trained reconstructed convolutionalneural network; and 4, performing super-resolution reconstruction on a to-be-reconstructed image based on the reconstructed convolutional neural network trained in the step 3. According to the method,the problem of insufficient training samples of the self-learning algorithm can be effectively solved, and the over-fitting phenomenon of the network can be avoided; meanwhile, a high-resolution image with a higher peak signal-to-noise ratio and a better visual effect can be obtained.

The invention discloses a terahertz full-360-degree reflection type phase shifter based on a SiGe process. By adjusting the structure of the reflection type phase shifter, the insertion loss and the phase shift range performance of the reflection type phase shifter are improved, the reflection type phase shifter which is balanced in power consumption and insertion loss and has a full 360-degree phase shift range is obtained, and the phase shifter with the structure can be applied to a millimeter wave / terahertz phased array system.

The invention belongs to the technical field of food raw material processing, and particularly relates to a food coating prepared from raw milk as well as a preparation method and application of the food coating. The food coating comprises the following components of whole milk powder, polydextrose, raw milk and other mixed materials including edible essence, phospholipid, vegetable oil, anhydrouscream, maltitol and isomaltooligosacharide; carrageenan, xanthan gum and sodium carboxymethyl cellulose in a certain mass ratio are added in the preparation process, heating and emulsification is performed, and then cutting molding is performed. The prepared food coating is good in stability and high in purity, the pleasant smell can be kept, and the protein content can be effectively protected.

The invention discloses a method for calculating the magnetic core loss of a high-frequency transform, relates to two important parameters T*, lambda *. Temperature coefficient T*. The parameter is the temperature specific gravity of the core at room temperature and the temperature rise in the operating environment. The parameter is an important factor in the present invention because the temperature of the transformer core increases during operation and the temperature causes a change in the loss. Compared with the original Steinmetz formula, the invention adds the temperature coefficient andthe waveform coefficient parameter, compensates the influence of the temperature change on the magnetic core loss, improves the excitation condition of the waveform, and makes the calculation of themagnetic core loss more accurate.

The invention mainly relates to the technical field of raising of pigs, and discloses a feed additive for sows at a lactation period. The feed additive is prepared from the following raw materials in parts by weight: 26-28 parts of spirulina, 17-19 parts of pumpkin seed oil, 11-13 parts of soybean protein, 5-7 parts of calcium gluconate, 2.3-2.5 parts of zinc sulfate, 1.2-1.4 parts of sodium selenite, 1.1-1.3 parts of lycopene and 13-15 parts of lactic acid bacteria. The feed additive is balanced in nutrients, rich in fragrance, good in palatability and easy to absorb, the quality of milk of the sows can be improved, the survival rate of piggies can reach 100%, the number of born fetuses of the sows can be increased to 12-13, the replacement frequency of the sows is obviously reduced, and the economic returns are increased by 10.4%; and the calcium gluconate, the zinc sulfate and the sodium selenite are added, so that the losses of mineral elements, caused by long-term lactation of the sows, can be complemented, the disease resistance of the sows is strengthened, nutrient components of the milk can be balanced, the absorption of the piggies can be promoted, the immunity of the piggies can be enhanced, and the survival rate of the piggies can be increased.

The invention discloses a treatment method for production waste water generated in preparation of bromaminic acid sodium salt through bromination. The treatment method comprises the following steps (1) pretreating the production waste water by adopting a reducing agent and an adsorbent; and (2) performing membrane treatment on the production waste water in the step (1) through an ion exchange membrane. According to the treatment method, the waste water is pretreated by adopting the reducing agent and the adsorbent, and then is filtered by utilizing the ion exchange membrane so as to separate bromaminic acid sodium salt in dissolved state from incompletely reacted sulphonate so as to be recovered and mechanically applied into production, so that the loss of bromaminic acid sodium salt during preparation can be compensated, and the emission amount of the waste water can be decreased. In addition, according to the treatment method, the color and COD of a part of effluent can also be reduced, and further the treatment cost and difficulty of the waste water can be lowered.

The invention discloses mobile communication active antennas and a distributed antenna system with the same, and mainly solves the problems as follows: in the prior art, power loss is more because most conventional DASs (Distributed Antenna Systems) adopt passive antennas; the application effects of passive antennas decline with the increase of the coverage; passive antennas are difficult to popularize and apply. Each mobile communication active antenna comprises a first duplexer, a downlink amplifying module, a downlink filtering module, a downlink power amplifying module, a second duplexer, an uplink low-noise amplifying module, an uplink filtering module and an uplink power amplifying module which are connected clockwise into a cyclic structure. Through the adoption of the scheme, the purposes that the power consumption is lower and the coverage is wider are achieved. Therefore, the mobile communication active antennas have high utility values and popularization values.

The invention provides healthy preserved honey pomelo fruits and a preparation method thereof, and relates to the field of food processing. The healthy preserved honey pomelo fruits comprise the following ingredients in parts by weight: 20-30 parts of debitterized honey pomelo peel, 9-13 parts of debitterized grapefruit peel, 15-24 parts of xylitol, 15-24 parts of maltitol, 1.1-1.3 parts of citric acid monohydrate, 0.15-0.23 part of fructus momordicae, 0.08-0.13 part of compound vitamins, and 0.02-0.04 part of potassium sorbate; the total sugar content of the healthy preserved honey pomelo fruits is 1% or lower; and the water content of the healthy preserved honey pomelo fruits is 22% or lower. The healthy preserved honey pomelo fruits have unique aroma of the grapefruits, and are different in flavor from the inside to the outside so that a good taste gradation is ensured. Inherent cough-reliving effect of the honey pomelo peel is reinforced by addition of the fructus momordicae; and the added compound vitamins are used for preventing and treating vitamin deficiency so that the healthy preserved honey pomelo fruits are good in health-care effects.

The invention relates to a preparation method of pearl powder capsule with high calcium and high zinc. The preparation method includes the following procedures: the pearls are selected; after washed, the selected pearls are dried to sterilize; the dried pearls are crushed by the machine and are made to pass through the screen, and fine powder whose particle size is less than 100 orders is prepared; and then the fine powder is crushed by airflow to be 50 to 100 nanometers; then 65 to 98 percent weight parts of nanometer pearl micropowder and 2 to 35 percent weight parts of zinc gluconate or zinc lactate or yeast biozinc are well mixed, and finished product of powder is prepared; the finished product of powder is processed into the pearl powder capsules with high calcium and high zinc; and finally, the pearl powder capsules with high calcium and high zinc are filled into bottles and then the bottles are packaged. The invention can supplement calcium and zinc. Natural pearls contain more than 20 kinds of amino acids, trace elements needed by the human body and plenty of biological active calcium carbonate, so the natural pearls have functions of clearing heart and tranquilization, diminishing inflammation and reducing pathogenic fire, protecting eyes and improving eyesight, holding moisture and moistening the skin, and resisting wrinkle and lightening skin, etc. Zinc can promote physical development and intelligence and can enhance the immune function. The yeast biozinc is the organic combination of zinc and protein inside the yeast; the biological absorption is high; and the yeast biozinc has no toxic side effects on the human body or stimulation on the intestine and stomach.

The invention discloses an alternating current variable frequency control method suitable for vibration ageing, which is characterized in that a lower computer sets a function baud table according to a sine function y=A (sinx + ksinNx, N=1, 2, 3,...), thus the alternating current signal of a driving power module of the lower computer contains a higher harmonic wave; when an upper computer sends a rotating speed instruction to the lower computer, the lower computer sequentially calls points in an array to output a sine wave; and the alternating current signal output by a control power module is a driving square wave of the power module output by automatically searching the function baud table by the lower computer through a register shifting method. By changing the operational method of the lower computer, the invention improves the stabilized rotating speed of a single chip microcomputer (SCM) so that the SCM saves a large amount of resources for operating sine functions, thereby improving the CPU processing speed, greatly improving the stabilized speed, inhibiting the influence of the self-induced higher harmonic wave on bus output, making up the switching delay and the dead loss of the power module, effectively improving the driving capability of the power module and meeting the requirements of the vibration ageing process.

The invention discloses a screening and domesticating method of microbial flora used for purifying water quality of gardens. The screening and domesticating method comprises the following steps: obtaining a bacterium source sample from sludge of water ponds of the gardens; preparing an enrichment culture medium according to nutritional requirements of efficient purification flora; adding the bacterium source sample into the enrichment culture medium and carrying out rapid enrichment culture to obtain a culture solution, so as to rapidly enrich a lot of flora, with high pertinence and high enrichment efficiency; utilizing a designed domesticating device and adding nutrient substances; carrying out domesticating treatment to obtain the microbial flora. The domesticating device has the advantages of simple structure, energy saving and high efficiency and high practicability; under a normal-temperature condition, the screened microbial flora can be domesticated through natural pressure difference, natural water temperatures and the like and a domesticating process is energy-saving and environmentally friendly; the method disclosed by the invention is economical, efficient, energy-saving and practical; after the screened microbial flora are domesticated, the microbial flora can be rapidly adapted to a water environment of the gardens; the efficient purification of sewage pond water of the water ponds of the gardens can be realized; the screening and domesticating method is ecologically safe, has no pollution and a high adaptive capacity, and is convenient for large-area application and popularization.

The invention relates to an alternating hybrid excitation component and an application of the alternating hybrid excitation component in a rotary motor, a linear motor and a transformer. The alternating hybrid excitation component comprises even-number layers of iron cores and a plurality of magnetic isolation layers, wherein the magnetic isolation layers are arranged between the layers of the iron cores, the even-number layers of the iron cores and the magnetic isolation layers form the shape of a closed loop or an open loop, one or two gaps are formed in each layer of the iron core, a permanent magnet is inlaid at the gap in each layer of the iron core, two magnetic pole faces of the permanent magnet are clung to two opposite sides of the gap of the iron core, and a clearance is left between one lateral surface of the permanent magnet and the lateral side of the gap of the iron core; furthermore, the magnetic polarity directions of the permanent magnets inlaid at the gaps in every two adjacent layers of the iron cores are different, and exciting coils in a same set surround the periphery of each layer of the iron core. The alternating hybrid excitation component superposes permanent magnet magnetic potentials and excitation magnetic potentials to form an alternating hybrid excitation magnetic field, so that the electromagnetic energy efficiency can be improved. The invention further provides examples of the alternating hybrid excitation component applied to the rotary motor, the linear motor and the transformer.

The invention provides an uplink signal processing method, which comprises the steps as follows: terminal equipment receives a digital signal transmitted by a first user terminal, converts the digital signal into a carrier signal and transmits the carrier signal; relay equipment receives the carrier signal, gains the carrier signal and transmits the gained carrier signal; head end equipment receives the gained carrier signal, converts the digital signal into the digital signal and transmits the digital signal; and optical network unit equipment receives the digital signal, converts the digital signal into an optical signal and transmits the optical signal to an optical line terminal.

The invention relates to a downlink signal processing method of a distribution automation system. The method is characterized in that the method comprises: an optical signal is converted into a digital signal by equipment; the digital signal is converted into a carrier signal; the gained carrier signal is converted into a digital signal; and then the signal is sent to a user terminal. With the method, mixed networking of fiber communication and carrier communication is realized, so that fiber laying on communication line construction can be reduced and thus the communication line construction cost can be reduced; and the intelligent grid construction progress can be accelerated.

The invention provides preserved orange peel and honey pomelo fruits, as well as a preparation method thereof, and relates to the field of food processing. The preserved orange peel and honey pomelo fruits comprise the following ingredients in parts by weight: 20-30 parts of debitterized honey pomelo peel, 11-13 parts of inner-membrance-removed orange peel juice, 9-11 parts of debitterized honey pomelo juice, 7-9 parts of seed-removed lemon juice, 15-24 parts of xylitol, 15-24 parts of malttiol, 0.08-0.13 part of compound vitamins, and 0.02-0.04 part of potassium sorbate; the total sugar content of the preserved orange peel and honey pomelo fruits is 3% or lower; and the water content of the preserved orange peel and honey pomelo fruits is 20% or lower. Natural materials, including the inner-membrance-removed orange peel juice, the debitterized honey pomelo juice and the seed-removed lemon juice, are added into the honey pomelo peel so that the original flavor of the honey pomelo peel can be adjusted; and thus, the prepared preserved orange peel and honey pomelo fruits are overall delicious, sweet, tasty and appropriate in sour-sweet taste, rich in flavor, and enriched with vitamins.

This invention relates to lithium secondary battery cathode, which comprises integration and cathode materials layer on the integration part, wherein, the battery cathode comprises lithium alloy layer outside cathode layer; the battery has high initial discharging efficiency and first recycle discharging capacity and second one.

The invention discloses a silicon wafer cleaning method which comprises the following steps: putting a silicon wafer into a first solution, and introducing ozone into the first solution; wherein the first solution comprises hydrochloric acid; taking the silicon wafer out of the first solution and put into a second solution, wherein the second solution comprises nitric acid and hydrofluoric acid; taking the silicon wafer out of the second solution, putting the silicon wafer into a third solution, and introducing ozone into the third solution; wherein the third solution comprises ammonia water;taking the silicon wafer out of the third solution and putting the wafer into a fourth solution, wherein the fourth solution comprises hydrochloric acid and hydrofluoric acid; and taking out the silicon wafer from the fourth solution, and drying the silicon wafer. Decomposition of hydrogen peroxide and loss of oxygen atoms are compensated, removal of trace metal ions is accelerated, and the surface cleanliness of the silicon wafer is improved, so that the minority carrier lifetime of the silicon wafer is prolonged. Meanwhile, the heating temperature is reduced, and the loss of chemical reagents is reduced, so that the fluid infusion amount of the chemical reagents is reduced, and the replacement period of chemical solutions is prolonged.

The invention relates to a vacuum heat collector, which mainly comprises a vacuum cavity and a heat transfer unit, wherein the vacuum cavity comprises a cavity wall and a plurality of temperature conducting particles, the cavity wall defines a chamber, the temperature conducting particles are suspended in the chamber, the temperature conducting particles can generate vibration after being heated, are mutually collided and can release the heat energy, the heat transfer unit comprises at least one temperature superconducting pipe, and the temperature superconducting pipe connects the vacuum cavity and a heat source, and is used for conducting the heat energy generated by the heat source to the vacuum cavity. Thereby, the invention can release the heat energy through the vacuum cavity, and the vacuum cavity can compensate the consumption in the heat energy transfer process, and can effectively improve the heat efficiency, so the invention has high practicability.