150results about How to "The technical method is simple" patented technology

A method for measuring displacement / distance based on principle of continuous sound field phase discrimination for ultrasonic wave or sound wave includes equally dividing sound pressure wavelength received by receiver to be at least 28 ¿C 210 fine broken number as per phase in period of operating frequency for ultrasonic or sonar transducer, obtaining increment counting pulse of coarse bit code through logic operation based on phase code for outputting data rate up to 40 KH2.

The invention discloses an isolated word speech recognition method based on an HRSF (Half Raised Sine Function) and an improved DTW (Dynamic Time Warping) algorithm. The isolated word speech recognition method comprises the following steps that (1), a received analog voice signal is preprocessed; preprocessing comprises pre-filtering, sampling, quantification, pre-emphasis, windowing, short-time energy analysis, short-time average zero crossing rate analysis and end-point detection; (2), a power spectrum X(n) of a frame signal is obtained by FFT (Fast Fourier Transform) and is converted into a power spectrum under a Mel frequency; an MFCC (Mel Frequency Cepstrum Coefficient) parameter is calculated; the calculated MFCC parameter is subjected to HRSF cepstrum raising after a first order difference and a second order difference are calculated; and (3), the improved DTW algorithm is adopted to match test templates with reference templates; and the reference template with the maximum matching score serves as an identification result. According to the isolated word speech recognition method, the identification of a single Chinese character is achieved through the improved DTW algorithm, and the identification rate and the identification speed of the single Chinese character are increased.

The invention discloses a three-dimensional directional well trajectory design and control parameter discrimination method. The method includes: via relative coordinates of a target in a target horizon with respect to a tapered plane arc trajectory full-curve tangent midpoint, establishing discrimination criteria, and performing discrimination and valuing on a change amount of a design target hitting azimuth with respect to an azimuth of an arch trajectory start point; discriminating and valuing a design tool face angle via overlap criteria of values obtained by calculating through double formulas of tool face angle; according to the tool face angle obtained by discrimination, verifying targeted design parameters and targeted coordinates via trajectory backward inversion. Compared with traditional target parameter discrimination methods, the method helps prevent the problems that discrimination by directly using target closure azimuth difference causes 0-degree azimuth ambiguity and discrimination of the tool face angle according to functional rules of 0-degree to 360-degree quartering of different tool face angles may has deviations; the method is simple and highly applicable.

The invention relates to an effect evaluation method of a traffic demand management measures based on identification data of license plates, particularly to an implementation effect evaluation technology for the traffic demand management measures based on the identification data of license plates, which comprises the following steps: analyzing the data mining and effective information extraction from the existing identification data of vehicles in details, extracting traveling routes of vehicles with a shortest route algorithm and fuzzy inference technology in consideration of the basic characteristics of urban transportation, and real-time evaluating the traffic demand management measures in combination with the traffic subzone dynamic partitioning method. By adopting the technology provided by the invention, the effects that the travelling conditions are easily met, the operation method is simple and feasible and the evaluation results are accurate and timely are achieved, and the shortcoming that the evaluation technology in the prior art is difficult in dynamic adjustment of evaluation range and has long data acquisition cycle and poor real-time performance is overcome.

The present invention relates to an antibiotic-free beef cattle growing and fattening premix and feed. The beneficial effects of the premix and feed are as follows: the probiotics, enzyme preparations, origanum oil and allicin work together to constitute a healthy and complete digestion micro-environment in the gastrointestinal environment, the scientifically added several substances with appropriate proportions are matched with other raw materials to make feed digestibility reach the best and the cattle gastrointestinal health be further improved, and to increase the growth rate of the beef cattle. The technique method is simple, safe and reliable, and can completely replace antibiotics.

The invention discloses a rice field-upland field rotation planting method for broad beans, potatoes and rice. The method comprises the following steps: (1) midseason rice production: planting midseason rice in well ploughed rice fields; (2) ratoon rice production: instantly irrigating the fields and seeding after midseason rice harvest, draining water in the rice fields after ratoon rice harvest; (3) broad bean sowing: seeding in the drained rice fields in a mode of seeding two lines while skipping two lines; (4) potato sowing: seeding in the idle lines after broad bean sowing, and enabling straw to be covered on the fields after seeding; and (5) harvest: harvesting fresh broad bean pods and the potatoes on April 27th to May 3rd next year. According to the rice field-upland field rotation planting method, crop economy benefits of limited land resources and temperature and light utilization of crops are organically combined to the largest extent according to eco-climate conditions of Chongqing Municipality, the complementary advantages of growth periods, growth vigor and water-fertilizer utilization and the like of the rice, the broad beans and the potatoes are ingeniously utilized, crop rotation and relay intercropping are arranged reasonably, light and temperature resources are fully effectively utilized, the complementary advantages among the crops are utilized, agricultural planting benefits are maximized, and the method is easily understood and saves labor.

The invention discloses a simulation test apparatus of a tectonic stress field and a method thereof. The apparatus comprises a simulated test bench, a loading module arranged at the top of the test bench, lateral loading systems, and a console. The simulated test bench includes a cuboid frame and baffle plates installed at the periphery of the cuboid frame. A model is laid inside the frame and is formed by successively laying of a plurality of layers of similar materials; and a water capsule and a smooth plate assembly are arranged between the bottom similar material and the similar material at the upper layer. The smooth plate assembly includes at least two smooth plates and a clamp groove part enabling the smooth plates to move relatively; and the water capsule is laid below the smooth plates. At least one separator plate for simulating a facture layer is arranged inside the similar material layer above the smooth plates in advance; and a certain included angle is formed between the separator plate and the water capsule at the horizontal direction. According to the invention, quantitative researches on the stress field evolution process during the tectonic movement formation process can be realized; and a beneficial theory and data basis can be provided for underground activities like mining.

The invention discloses a method for solving a water lock effect. By adopting the method, functional powder is added to a duct for producing a water lock, so as to remove the water lock. The functional powder is mixed powder formed by amphiphilic powder or super-hydrophilic powder and hydrophobic powder; the grain density of the functional powder is greater than 1 g / cm<3>; the mean grain size of the functional powder is smaller than 100 microns. The method disclosed by the invention is simple and feasible, convenient to operate, wide in material source, and low in cost. Meanwhile, the liquid-phase interfacial tension can be reduced by the functional powder in the using process of the method disclosed by the invention; the functional powder is in a small-granule solid state, so that the functional powder is easily left in a small hole or a gap in the rock surface, and has strong durability on inhibition of a damage of the water lock. In addition, compared with an acidification method, the flow-back effect of the method is greatly improved, so that the water lock effect can be better solved; the productivity of an oil well is greatly also improved.

The invention discloses cellulose nano-whisker (CNW) compounded bi-component terpenyl waterborne polyurethane and a preparation method and use thereof. According to the preparation method, a CNW aqueous suspension is directly added into a terpenyl polyol aqueous dispersion by stirring and ultrasonic vibration methods and then is crosslinked with polyisocyanate, thereby obtaining a CNW compounded bi-component waterborne polyurethane system. The compounded system is applied to the preparation of waterborne polyurethane coatings, adhesives and polymer materials. The preparation method of the compounded system is simple and convenient, and CNWs can be uniformly and steadily dispersed into the polyol aqueous dispersion without surface modification and drying. Active hydroxyl of the surfaces of the CNWs is subjected to chemical and physical compounding with thermosetting matrix resin, so that the interaction between the CNWs and resin matrix interfaces is enhanced, and the properties of composite materials can be effectively improved.

The invention relates to a small water body breeding method for litopenaeus vannamei and belongs to the technical field of aquatic product breeding. The method includes six steps of seawater treatment, larva placing, environmental control, feedstuff adding, water quality adjusting and controlling and quality inspection. The breeding method is simple, convenient to operate, and suitable for breeding high-quality and healthy litopenaeus vannamei seeds, the appearance of bred seeds is free from malformation, neat, uniform, and the litopenaeus vannamei can normally and forcefully swim and ingest food, good in property against the current and capable of sensitively reacting.

The invention relates to an introduction, seedling-expanding and propagation technology of a precious and superior tree species, in particular to a method for breaking dormancy and sowing Sorbus sibirica seeds. The method comprises the steps of 1) collecting superior tree Sorbus sibirica fruits, processing, removing fruit pulp, cleaning, drying in the air, leading the water content of the seeds to be 20%-30%, and carrying out cold preservation at the temperature of 1-3 DEG C for standby; and 2) breaking the dormancy and sowing the seeds: breaking the dormancy of the seeds, sowing and propagating seedlings, and keeping the water content of the soil after the sowing at 18-23%. The method can obviously obtain better seedling raising effect, the test result shows that the germination rate of the seeds after breaking the dormancy can be more than 90%, the germination of the seeds is trim, the seedling emergence rate can be more than 85%, the phenomena of non-emergence of the seedlings or uneven seedlings of natural seeding or conventional sowing, in the year, the highest Sorbus sibirica seedling is 71cm, the average height of the seedlings is 40.78cm, the largest basal diameter is 1.18cm, the average basal diameter is 0.82cm, and the seedling raising effect is good.

The invention relates to an antibiotic-free premix for a growing rex rabbit. The antibiotic-free premix comprises the following components in percentage by weight: 3%-8% of mannan oligosaccharide, 2%-4% of bacillus subtilis, 2%-4% of lactobacillus, 2%-4% of acid proteinase, 2%-4% of amylase, 2%-4% of cellulase, 1%-3% of garlicin, 3%-8% of fromadriamycin, 0.5%-1.5% of ethoxyquin, 1.5%-3% of robenidine hydrochloride, 2%-8% of ferrous sulfate, 2%-5% of copper sulfate, 0.2%-1% of manganese sulfate, 1.5%-3% of zinc sulfate, 0.02%-1% of potassium iodide, 0.1%-0.2% of sodium selenite, 0.15%-0.25% of cobalt chloride, 10%-20% of dicalcium phosphate, 5%-12% of calcium carbonate, 2%-4% of multivitamin, 1%-3% of L-lysine hydrochloride, 2%-4% of DL-methionine and the balance of defatted rice bran. The antibiotic-free premix disclosed by the invention can promote the establishment of the intestinal function of the growing rex rabbit, improve the intestinal health and enhance the digestion utilization ratio of growing rex rabbit feeds and is convenient to use by users.

The invention discloses a femtosecond laser direct writing preparation method of a two-dimensional submicron butterfly-shaped metal microstructure. The technical scheme comprises the following steps: (1) a metal target sample material is polished and mounted; (2) linear polarization and angular polarization double-pulse femtosecond laser capable of changing the delay time is obtained; (3) the point focusing of the double-pulse femtosecond laser is performed; (4) the position of the metal target sample material is adjusted; (5) the focal position of an objective lens is determined; (6) the surface of the metal target sample material is adjusted; and (7) the two-dimensional submicron butterfly-shaped metal microstructure is prepared. The method forms two linear polarization and angular polarization double-pulse femtosecond laser for homochromatic collinear transmission and capable of changing the delay time through skillfully using a light splitting method of a micronanometer machining platform, and adopts the objective lens point focusing mode to conveniently and quickly perform direct writing on the metal surface to prepare the two-dimensional submicron butterfly-shaped metal microstructure with bent stripe direction.

The invention discloses a preparation method for a patterned electrode. The preparation method comprises the following steps of: (1) covering the surface of the electrode by using a nano-structured layer, wherein the coverage rate of the nano-structured layer on the surface of the electrode is 15 to 100 percent; (2) corroding the electrode by using the nano-structured layer as a template; and (3) removing the nano-structured layer to obtain the patterned electrode. The preparation method is simple, and nicks on the surface of the patterned electrode are easy to control. The invention discloses the patterned electrode obtained by the preparation method. By the patterned electrode, the optimization of the morphological structure of an organic light active layer can be induced in the preparation process of an organic solar cell, so that the performance of the organic solar cell can be improved, and the photoelectric energy conversion efficiency of the solar cell can be improved. The invention also discloses the organic solar cell. The organic solar cell can be efficiently manufactured, and the cost is low.

The invention discloses a pleurotus nebrodensis storage logistics preservation method. The method comprises the following steps of: performing grading treatment on picked pleurotus nebrodensis, and simultaneously finishing the pleurotus nebrodensis bodies; containing the finished pleurotus nebrodensis bodies in a ventilated plastic basket and moving the basket to a cool well-ventilated place for air drying, and packaging with food packaging paper for later use; performing dehumidifying treatment and moving in a refrigerator for full precooling; packaging the pleurotus nebrodensis bodies into polyethylene silicone window preservation bags; and containing the pleurotus nebrodensis bodies in transfer baskets, shelving for storage, and keeping the temperature constantly and periodically checking in the storage period. In the process of discharging transportation and sales after the pleurotus nebrodensis is stored, if the marketing distance is short, the pleurotus nebrodensis bodies are packaged in preservation boxes, and during long-distance transportation, pleurotus nebrodensis bodies are transported by a refrigerator track. By combining the selected high-quality pleurotus nebrodensis with low-temperature and spontaneous controlled-atmosphere green pollution-free complementary measures to store the pleurotus nebrodensis for 50 days, the pleurotus nebrodensis bodies are white in color, fresh and tender in texture, good in mouthfeel, fresh and free from peculiar smell, meet the standard indexes of commodities and have the commodity rate of 95 percent.

The invention relates to a hare growth fattening premix without antibiotics and a feed. The hare growth fattening premix without the antibiotics and the feed, disclosed by the invention, have the benefits that probiotic, an enzyme preparation, cretian origanum oil and garlicin are in combined action, so that healthy complete digestion microenvironment is formed in gastroenteric internal environment; several substances in appropriate proportion are scientifically added and are collocated with other raw materials, so that the optimal feed digestibility is further achieved, the health of gastrointestinal tracts of hares is further improved, and the growth rate of the hares is increased. The technical method is simple, safe and reliable, and can completely replace the antibiotics.

The invention relates to an antibiotics-free premixed material and an antibiotics-free feed for growth and fattening of mutton sheep. The premix material and the feed are advantaged in that by means of cooperative effects among probiotics, enzyme preparations, oregano oil and allicin, a healthy and complete digestion micro-environment is formed in the stomach and intestine, wherein the feed achieves the best digestion rate due to scientifically addition of several substances in proper ratio with other raw materials, thereby further improving health in the stomach and intestine of mutton sheep and increasing growth speed of the mutton sheep. The premix material and the feed are simple in technical method, are safe and reliable and can be used for replacing antibiotics completely.

The invention provides a method for forming an artificial water storage stratum through a solid filling coal-mining technology. The method comprises the following steps that goaf filling of alternating non-dense filling zones and dense filling zones is conducted on coal pillars and surrounding coal seams in a mine area, and the artificial water storage stratum is formed in a goaf of the non-densefilling zones; and surface rainfall is introduced into the artificial water storage stratum through two paths of a mining-induced fracture seepage channel and an artificial water-injection channel. According to the method, unexploited coal of the coal pillars can be recovered safely and efficiently, solid waste in the mining area can be fully utilized and treated, the water storage stratum is constructed, namely an underground reservoir is formed, and the problems of storage and protection utilization of water resources in a water-shortage mining area are solved; and the method is simple, safe, reliable, and convenient to apply and popularize, and has the good economic, social and environmental benefits.

The invention belongs to the field of animal husbandry, and particularly relates to a method for promoting female and male parent giant salamanders to synchronously mature. The method is suitable for artificial rearing of giant salamanders. The method is characterized by being realized through the following mode: firstly, selecting sexually-mature parent giant salamanders, and artificially domesticating the parent giant salamanders to enable the same to be capable of taking in food initiatively; and secondly, feeding spawning-inducing medicine to the artificially-domesticated parent giant salamanders from the middle of August to the beginning of September in each year, wherein the spawning-inducing medicine is prepared by mixing luteinizing hormone releasing hormone analogs (LHR-A), human chorionic gonadotrophin (HCG) for fishes and carp pituitary glands. The method of feeding the spawning-inducing medicine is adopted to promote sexual glands of the parent giant salamanders to mature, so that sperm producing amount of male parent giant salamanders is increased by at least 35%, sperm activity is improved by more than 40%, egg laying amount of female parent giant salamanders is increased, and success rate of artificial fertilization is increased by more than 85%.

The invention relates to the field of an auto recloser of an electrical system, particularly relates to an intelligent type auto recloser which is applicable for a bus line with the voltage grade of 220 kV and more than 220kV. The invention aims at overcoming the problem that the prior art can not be applied on the bus line because of the failure of distinguishing temporary faults from permanent faults. The invention provides the technical proposal that the intelligent type auto recloser which is applicable for the bus line with the voltage grade of 220 kV and more than 220 kV is finished by making use of the following steps: 1. when the bus line is broken down, three phases of all circuit breakers that are connected with the bus line are tripped off through the bus-line protecting action so as to facilitate the fast arc extinction and ensure the temporary faults to be eliminated; 2. the bus-line differential protection, the zero-sequence current and the phase voltage are utilized to obtain fault types; 3. a relevant power supply is closed so as to distinguish fault properties (temporary or permanent); 4. the corresponding operations are carried out according to fault properties.

A glass passivation technique for large-diameter silicon wafer semiconductor devices is characterized by utilizing cutting and photoetching processes to isolate a passivating glass film layer between chips on a silicon substrate before thinning the back surface of the substrate of the large-diameter silicon wafer, or utilizing a screen mask isolating process to isolate the passivating glass film layer between the chips on the silicon substrate during glass passivation. Glass-silicon internal stress caused by difference of passivating glass-silicon thermal expansion coefficients in the glass passivation process can be effectively released or eliminated in a small range among chips, thereby effectively preventing silicon wafer warping, cracking or breaking caused by thinning the back surface of the substrate of the large-diameter silicon wafer. The technique can guarantee realization of the optimum designs of electric parameters and reliability for silicon semiconductor devices during glass passivation, and is particularly adaptable to large scale production of glass-passivated semiconductor devices with large-diameter silicon wafers.

The invention discloses a preparation method of an aromatic carboxylic acid modified zero-valent iron agent. The method comprises the following steps: adding a zero-valent iron agent into a solvent under the condition of normal temperature by taking an aromatic carboxylic acid aqueous solution as the solvent, carrying out complexation reaction, and separating to obtain the aromatic carboxylic acid modified zero-valent iron agent, or sequentially or simultaneously adding sodium borohydride and a vulcanizing agent into a ferric salt and / or ferrous salt, carrying out reduction reaction and vulcanization reaction, and separating to obtain the aromatic carboxylic acid modified vulcanized nano zero-valent iron. Iron oxide, iron sulfide or iron nitride on the surface of the aromatic carboxylic acid modified zero-valent iron agent is complexed with carboxyl functional groups in aromatic carboxylic acid, so that passivation of zero-valent iron is inhibited, more electrons can be released to degrade pollutants, and the degradation efficiency is improved.

The invention relates to a method for rapidly exercising field melasma herb tissue culture seedlings and belongs to the technical field of field melasma herb artificial cultivation. The method comprises six technical links of substrate formula selection, substrate sterilization, tissue culture seedling exercising management before seedlings come out of a bottle, bottle opening and seedling cleaning and sterilization, seedling exercising and planting method and management in a seedling exercising stage after planting; the field melasma herb tissue culture seedlings can be exercised and domesticated for 15-20 d; after the exercised and domesticated tissue culture seedlings are transplanted to big fields, the survival rate of the tissue culture seedlings is more than 95 %; the method provided by the invention has the advantages of high seedling exercising and domesticating speed, high seedling percentage and so on; and problems of lower field melasma herb tissue culture seedling transplanting survival rate, slow growth and the like are solved. The method provided by the invention has the advantages of simplicity, lower cost and convenience in operation and is suitable for being applied to actual production.

The invention discloses a method for breeding high-protein peanut quality, which selects germplasm materials with good comprehensive characters and high-protein content to assemble parental combination; single plant with good comprehensive character is selected by breeding goal in early segregation generation, which is a high-yield pressure screening; the single plant with good comprehensive character is selected by the same standard in different segregation generation and the protein content of each single plant with good comprehensive character is measured; stable high-protein variety or strain with good comprehensive character is acquired through double pressure selection of multi-generation high-yield and high protein as well as directional breeding. The method for breeding high-protein peanut quality can carry out direct selection of protein content character; the invention is characterized by short breeding period, little blindness and high breeding efficiency. Peanut variety with high-protein content and good comprehensive character can be bred, which has good economic and social benefit.

The invention discloses a method for manually ageing rice seeds, which belongs to the technical field of seed detection. The method comprises the following steps: treating the rice seeds at different temperatures under the condition that the relative humidity is 100 percent to accelerate ageing, and observing the influence of manual ageing on the sprouting rate of the seeds and the growth of seedlings after the treatment. The experiment results show that the optimal manual ageing conditions of the rice seeds comprise that the temperature is 46.5 DEG C and the relative humidity is 100 percent. The sprouting rate of the aged seeds begins to decline, the growth rate and the seedling emergence uniformity are reduced, the abnormal seedlings are increased, and finally the seeds lose the capability of sprouting. The manual ageing method provided by the invention can detect the storage capability and deterioration resistance of the rice seeds in short time. The method is scientific and reliable, is simple to operate, does not need complex equipment, and is convenient for popularization and application.

The invention discloses nanocrystalline cellulose (NCC) composite waterborne epoxy resin and a preparation method thereof. The preparation method comprises the following steps: directly adding NCC aqueous suspension into waterborne epoxy resin by adopting stirring and ultrasonic oscillation methods, and cross-linking with an amine curing agent for solidifying to obtain a NCC composite waterborne epoxy resin polymer. The manufacturing method of a composite system is simple and convenient, and NCC can be uniformly and stably dispersed in the waterborne epoxy resin without surface modification and drying. According to the preparation method, intermolecular hydrogen bonds are generated in a cross-linked network of active hydroxyl on the surface of the NCC and the epoxy resin, so that the interaction of the NCC and a resin substrate interface is enhanced and the performance of the composite material can be effectively improved. When the additive amount of the NCC is 8% by mass of the resin, the tensile modulus of the composite polymer is increased by 171%, the tensile strength is enhanced by 115%, and the storage modulus is increased by 438%.

The invention discloses an establishment technology of a hemsleya amabilis tissue culture system. Hemsleya amabilis is a cucurbitaceous plant and tuberous roots are dried. The hemsleya amabilis is produced in Yunnan, Sichuan, Guizhou, Guangxi and the like. The hemsleya amabilis is dug when leaves become yellow in late autumn; over-ground parts and silt are removed; then the hemsleya amabilis is washed, sliced or not, and dried in the sun. The tuberous roots are of an irregular round shape or oval shape and are of a slight tortoise shape in the vertical direction; the diameter of the large tuberous roots can reach 20cm. Peels are brown yellow or grey brown and are slightly rough and certain peels have concave caudex traces; sections of the peels are light white or grey brown. The hemsleya amabilis is firm and is almost powdery. The hemsleya amabilis has slight odor and a slightly bitter taste. The reproduction speed and the scale are improved by utilizing a plane tissue culture technology, so that industrialized production of hemsleya amabilis germchits is realized. Hemsleya amabilis tissue culture regenerated plants are successfully obtained by taking stems with buds as explants through steps of inducing, reproducing, rooting, carrying out seedling exercising and transplanting and the like, and a systemic hemsleya amabilis tissue culture plant regeneration system is established. The reproduction coefficient is high, the seedling rate is high and the benefits are great.

The invention belongs to the field of porous ceramic and in particular relates to an environment-friendly method for preparing mullite fiber based porous ceramic through gel casting. The mullite fiberbased porous ceramic is prepared from the following raw materials in percentage by mass: 11 to 32 percent of rho-Al2O3 powder, 13 to 36 percent of kaolin or zircon powder and 33 to 75 percent of mullite fiber. The method comprises the following steps: taking the rho-Al2O3 powder and the kaolin or zircon powder; adding a certain amount of de-ionized water; mechanically stirring and carrying out ultrasonic oscillation to obtain stable and uniform ceramic slurry; then uniformly adding the mullite fibers into the ceramic slurry; continually stirring and oscillating to obtain gel ceramic-fiber slurry; then carrying out injection molding and curing at room temperature; putting a molded biscuit into a constant-temperature drying box and drying; after de-molding, putting into a high-temperature furnace; sintering under an air atmosphere to obtain mullite combined or ZrO2-mullite combined mullite fiber based porous ceramic. The environment-friendly method has a simple and feasible technology and is environmentally friendly; the prepared mullite fiber based porous ceramic has high porosity, low heat conductivity and relatively high strength.

A corn germ pretreatment processing technology to eliminate mycotoxin in corn oil includes ozone fumigation of the corn germ, cleaning, impurity removal, modulation and softening, rolling, and alkali puffing. The ozone fumigation treatment is carried out in a closed chamber at a temperature of 5 DEG to 50 DEG C; ozone is introduced when the moisture content of corn germ is 7%-25% for ozone sterilization and mycotoxin pre-degradation for 0.5-48 h, wherein the ozone concentration is 5-50ppm. The alkali puffing is as below: adding alkali lye or steam with concentration of 5%-30% into the corn germ before corn puffing treatment or in the puffing process, wherein the addition amount is calculated by the content of mycotoxin in corn germ and the acid value of corn oil. The corn oil prepared from corn germ contains mycotoxins, such as aflatoxin B1 (AFB1) and zearalenone (ZEN), less than the national limit standard. The final product has the characteristics of low mycotoxin content, small acid value, light color, and little loss in refining.