55results about How to "Easy to succeed" patented technology

The invention provides a calculation method of the bearing capacity of a reinforced wall plate and belongs to the field of strength analysis of aircraft structures. According to the technical scheme, the calculation method is an axial compression loading action based calculation method of the effective width of buckling of a skin. Stiffness reduction is performed through modification of the cross section area and the moment of inertia of a stringer in a finite element model which is formed by plate beam units after the buckling of the skin is produced, stress analysis of a structure is performed by a linear iteration solution method of load loading steps, comparison is performed on the working stress of the stringer in a calculation result and the allowable limiting stress of a stringer and skin combined structure, the allowable limiting stress serves as a damage standard and is solved based on an engineering method, and accordingly the bearing capacity of the structure is obtained. Compared with the traditional full housing model, a calculation method model is a plate beam unit model, the geometric nonlinearity and contact problem solution which is large in time consumption and difficult to converge is replaced by the linear solution, and accordingly the modeling time consumption is small, the calculation speed is high, and the requirements for the professional quality of the computer hardware and analysis staff are low.

A secure keyboard combines a human interface device (HID), application programs stored in nonvolatile memory, and encryption technologies into a single package. Like any other keyboard, the secure keyboard communicates with a computer via a communications port. A computer can load and execute an application stored in the secure keyboard. The application, however, expects encrypted inputs. The HID inputs are encrypted before being passed to the computer and thence the application. Therefore, a secure link exists from the HID to the application. Choosing strong encryption and unique encryption / decryption keys allows applications to be keyed to a specific secure keyboard. No other keyboard can supply keyboard input to the application. The secure keyboard can be implemented as a security device that does not include a keyboard. The security device can accept HID inputs from HID devices, encrypts them, and passes them to the computer and thence the application.

The invention relates to a method for using apocynum paper cylinder cultivation technique to recover the plant at alkaline land. Wherein, it comprises that collecting apocynum root, treating the apocynum root, preparing cultivation soil, preparing seed bed, finishing land, transplanting, and managing field. The invention has the advantages that artificially planting the apocynum on alkaline land, to improve the ecologic environment.

The invention relates to a curved surface cutting trajectory obtaining method based on an STL model. The method comprises the steps that (1) all cut surface coordinate sets are determined according to the highest point and the lowest point of the model; (2) a cut surface is positioned, wherein triangular patch coordinates are used for positioning the index value of the corresponding cut surface in the coordinate set according to a hash function, and cut surface coordinates with an intersection point are obtained through the index value; (3) the intersection points of the cut surface and triangular patches are calculated to obtain section lines; (4) the section lines are ranked to obtain a cutting trajectory. According to the curved surface cutting trajectory obtaining method, in the layering process, each triangular patch is only visited once, and no complex topology structure needs to be built for the read triangular patches. After offset is conducted on the obtained curved surface cutting trajectory, the curved surface cutting trajectory can be used for generating a numerical control ring cutting machining tool path.

The invention discloses a method for alternately breeding South America white shrimps and giant freshwater prawns for three batches in a pond greenhouse. The method comprises the steps of building the pond greenhouse, cleaning and sterilizing the pond greenhouse, breeding the South America white shrimps and the giant freshwater prawns in a small shed, arranging offspring throwing time of the three batches, throwing fodder, managing water quality, supplementing oxygen in a combination mode, preventing and controlling diseases, and fishing the South America white shrimps and giant freshwater prawns of the three batches. The method is characterized in that the small shed is built in the greenhouse, and the offsprings are thrown to a pond after being bred in the small shed in a storing mode; the offsprings of the South America white shrimps of the first batch are thrown from March 18th to March 22nd, the offsprings of the South America white shrimps of the second batch are thrown from July 1st to July 6th, and the offsprings of the giant freshwater prawns of the third batch are thrown from October 20th to October 22nd; the first fishing time of the South America white shrimps of the first batch starts from May 20th to May 25th, and the last fishing time of the South America white shrimps of the first batch and pond clearing start from June 10th to June 20th; the first fishing time of the South America white shrimps of the second batch starts from October 5th to October 10th, and the last fishing time of the South America white shrimps of the second batch and pond clearing start from October 18th to October 20th; the first fishing time of the giant freshwater prawns of the third batch starts from November 18th to November 20th, and the last fishing time of the giant freshwater prawns of the third batch and pond clearing start from December 18th to December 25th.

The invention discloses diglyceride capable of still keeping clear under low temperature and a preparation method and an application thereof. The preparation method comprises the following steps: (1) performing hydrolysis reaction between fat or oil and water at the temperature of 200-260 DEG C and at the pressure of 2-8*10<6> Pa to obtain a mixture I; (2) extracting fatty acid in the compound I at the temperature of 5-0 DEG C to obtain a mixture II; (3) mixing liquid fatty acid and glycerol, and performing esterification reaction to obtain a mixture III; (4) performing molecular distillationand concentration on the mixture III to obtain a mixture IV; and (5) extracting the mixture IV at the temperature of 2-4 DEG C to obtain the diglyceride.

The invention relates to a device and a method for establishing a bone marrow liquid channel and realizing liquid exchange (injection or / and extraction) through the channel. The device comprises an adjusting sleeve, a retainer arranged in an inner cavity of the adjusting sleeve, a bone marrow needle component arranged in the inner cavity of the adjusting sleeve and between the retainer and a push rod, a spring chuck which is arranged in a recess of the push rod through a fixing pin and is sleeved with a check ring, a sleeve connected to one end of the adjusting sleeve, the push rod and a spring which are arranged in the sleeve, a sliding sleeve sleeved on the outer wall of the sleeve, a rear cover arranged at one end of the sleeve, and a safety pin inserted into the sliding sleeve and the sleeve, wherein an annular groove is formed on the push rod; an air vent is formed on the adjusting sleeve; and an annular step surface is formed in the adjusting sleeve. By the device for establishing the bone marrow liquid channel, a new method for conveniently injecting and accurately extracting liquid can be formed.

The invention relates to a continuous toner supplying toner cartridge, which comprises a toner bin portion and a waste toner bin portion, wherein a waste toner recycling adding port is arranged in the toner bin portion; a waste toner recycling supply mechanism that delivers toner from a lower position to a higher position is included in the toner cartridge; a waste toner delivery end of the waste toner recycling supply mechanism is arranged in the waste toner bin portion; and an output end of the waste toner recycling supply mechanism is connected with the waste toner recycling adding port of the toner bin portion. In this way, during the process of using the toner cartridge, the toner in the waste toner bin portion at a relatively low position can be transmitted and added to the toner bin portion at a relatively high position through the waste toner recycling supply mechanism, so that unlimited times of recycling of the toner and the continuous toner supplying of the toner cartridge can be realized. A technical problem that has been longing for a solution but has not been able to find one can be solved. The using cost can be saved and the problem that it is not able to print because of using up the toner can be prevented. In addition, the waste of the toner and pollution to the environment can be reduced, which is environment-friendly, high in market competitiveness, and easy for obtaining commercial success.

The invention discloses a self-cleaning method of a household floor washing machine, which comprises the following steps that: after the household floor washing machine is turned off, a controller automatically starts a self-cleaning mode; the self-cleaning mode comprises the following sub-steps that a liquid spraying device is controlled to spray liquid to a rolling brush intermittently; meanwhile, a host motor is controlled to work continuously, and liquid flowing through the rolling brush is sucked into a liquid suction pipeline; and when set conditions are met, the liquid spraying device and the host motor are controlled to stop working. According to the household floor washing machine, the rolling brush can be cleaned and dried in a full-automatic mode, the problem that water stains remain on the rolling brush after the washing machine is shut down is solved, and therefore the intelligence of the household floor washing machine is greatly improved, and the user experience is improved.

A simple method for screening the wheat genotype able to generate unreduced gamete for breaking through the 'reduplicative bottle neck' of reduplicating monoploid includes such steps as distant hybridizing between wheat and Aegilops variabilis to obtain plant F1, selfing, and screening.

The invention provides a cutting finishing method based on an STL defect model. The method comprises the following steps: step one, reading CT data of a defective bone model; step two, performing three-dimensional reconstruction on the CT data; and step three, performing VTK-based three-dimensional model cutting finishing. The method can be applied to providing an STL model of defect shape rules and is applied to manufacturing a biological 3D printing bone defect restoration body.

The invention discloses a self-cleaning method of a household scrubber. The method comprises the following step that a controller receives a starting signal and starts a self-cleaning mode, wherein the self-cleaning mode comprises the following sub-steps that (1) a liquid spraying device and a rolling brush motor are started at the same time, the liquid spraying device sprays a liquid to a rollingbrush, and the rolling brush motor enables the rolling brush to rotate; and (2) the rolling brush motor is kept in a starting state, the liquid spraying device is closed, a main machine motor is started, and the liquid flowing through the rolling brush is sucked to a liquid suction pipeline. According to the self-cleaning method of the household scrubber, the rolling brush and the liquid suctionpipeline can be cleaned in a full-automatic mode, the problem that in the prior art, manual hand washing wastes time and labor is solved, in addition, the liquid suction pipeline can be cleaned, all-around cleaning is achieved, and the remarkable effect is achieved.

The invention relates to methods for breeding the breeding materials of wheat and triticale. The method for breeding the wheat comprises the following steps: the new wheat idioplasm Lankao 52-54 is selected as a male parent, and wheat 0308 is selected as a female parent, and the male parent and the female parent are hybridized; and a filial generation and the male parent are carried out repeated backcrossing. The method for breeding the triticale comprises the following steps: No.8 triticale Lankao is selected as a male parent, the wheat 0308 is selected as a female parent, and the male parent and the female parent are hybridized; and a filial generation and the male parent are carried out repeated backcrossing. The wheat and the triticale which are bred by the invention have compatible hybridization with mediterranean agropyron and are easy to fruit; the excellent characteristics of the mediterranean agropyron can be inherited; and a plurality of new types and species of ice wheat and ice triticale can be bred.

The invention relates to a coconut shell mosaic unit and a preparation method thereof and belongs to the technical field of mosaic preparation. The technical problem to be solved is to provide a mildew proof, mothproof, anticorrosion and fire retardant coconut shell mosaic unit. The invention adopts a technical scheme that: the coconut shell mosaic unit comprises a green body layer and a decorative layer, wherein the decorative layer, which is coconut shell, covers and is fixedly connected with the surface of the green body layer. The coconut shell mosaic unit overcomes the drawback of the susceptibility to fire, mildew, corrosion and moth of the prior decorative material and thus can be widely used as a decorative material in various places.

The invention discloses an organic fertilizer composition. The organic fertilizer composition is characterized by being prepared from, by weight, 40-100 parts of peat, 5-30 parts of coconut dust, 2-20 parts of ground phosphate rock, 2-20 parts of potassium rock powder, 1-8 parts of strain powder, 3-8 parts of polyacrylamide and 1-15 parts of urea. The invention further discloses a preparation method and application. The organic fertilizer contains organic matter, nitrogen, phosphorus, potassium and other elements and further contains various trace elements and probiotics, when used, the organic fertilizer not only can serve as a good fertilizer source but also is a good soil modifying agent, and the organic fertilizer has a good effect on improving the germination percentage of seeds and promoting low-temperature seedling recovering.

The invention relates to needle mushroom bag-free cultivation and a cold frame bean sprout type fruiting method, belonging to the technical field of artificial needle mushroom cultivation. The traditional needle mushroom cultivation and fruiting method is fussy to operate and wastes labor and time. The method comprises the following steps: (1) blanking and seeding: covering a new film in a movable mould; carrying out disinfection and sterilization with steam in a space surrounded by the movable mould and the new film so as to obtain a microorganism-free area; blanking and seeding in the microorganism-free area; piercing and filtering air microorganisms; (2) culturing mycelium in an opened manner; (3) fruiting management: stimulating mycelium, surrounding the cold frame with wet sponge, and covering film and insulating; after the second period of fruiting, demoulding the culture medium to be naked, and backing earth in the cold frame bean sprout mode and fruiting. The method is used for artificial needle mushroom cultivation, can simplify the working procedure of needle mushroom cultivation so as to improve the yield and quality of the needle mushroom, and is more beneficial to large-scale industrial production of needle mushroom so that the investment is saved and the economical benefit of needle mushroom farmers are obviously improved.

The invention discloses a seleniferous special fertilizer for Pistacia vera. The special fertilizer is prepared from urea, monoammonium phosphate, potassium sulfate, EDTA chelate selenium, borax, magnesium sulfate, copper sulfate and humic acid. The special fertilizer for the Pistacia vera, disclosed by the invention, is remarkable in yield increasing effect and high in fertilizer utilization ratio, thereby being worthy of vigorous popularization. The fertilizer disclosed by the invention contains a water retention agent. A growing environment for the Pistacia vera is arid and is lack of water, and thus the special fertilizer can be used for storing a water source for the Pistacia vera, supplying moisture to the Pistacia vera and increasing the output and variety of the Pistacia vera.

The invention discloses a localization and fixation device for animal tibia surgery. The localization and fixation device comprises a tibia localization and fixation arm connected with an external fixation frame; the tibia localization and fixation arm is provided with a popliteal fossa localization unit, a knee fixation unit and an ankle fixation unit; and the tibia localization and fixation armis used for defining and fixing a surgery standard position of an animal tibia during tibia surgery, and thus, a surgical small environment operating platform of a three-dimensional standard positionimage of the tibia surgery is formed. According to the localization and fixation device, three-dimensional fixed-point surgical fixation for the orthopedic surgery on a laboratory animal tibia is realized, and thereby, implementation of tibia bone fixation needle puncture, the surgical standardized operation of a fracture and segmental bone defect experimental model, and the repeatability and thedata reliability of a surgical technique of an experimental animal tibia model can be guaranteed. Assisted by a three-dimensional adjustable fixation frame as the external fixation frame, the localization and fixation device makes the tibia localization and fixation arm have stable three-dimensional variability based on vertical and horizontal axial directions, so that a required surgical big environment suitable body position can be provided for a surgery operator.

The invention provides a treatment method of a micro organ. The treatment method comprises the following step sequentially dialyzing a fixed micro organ in dialysate I for 2 to 5 days under 1 to 10 DEG C and in dialysate II for 4 to 8 hours under -40 to -15 DEG C, wherein a formula of the dialysate I comprises 1M of Tris alkaline solution which is prepared from 10 percent of Triton-X 100, 2 percent of BSA (Bull Serum Albumin) and 0.05M of NaCl, and the pH (Potential of Hydrogen) is 6.8; a formula of the dialysate II comprises ethanol and DMSO (Dimethyl Sulfoxide) which are 4 to 1 in volume ratio. The treatment method provided by the invention is used for carrying out sizing and whole permeation treatment on the micro organ, an original morphology of the micro organ is kept, and the purposeof enabling macromolecular matters to fully permeate each position without changing the structural morphology of the micro organ and tissue cells can be realized; the treated micro organ is capable of accurately and sensitively carrying out cellular or subcellular location and qualitative and relatively quantitative analysis on molecules on the micro organ by utilizing specific binding reaction of molecular matters and through corresponding observation means such as a fluorescent microscope. Aiming at the difficulties that internal organs of animalcules in the field of biology are very smalland a tissue section technique is difficult to implement for the internal organs, the method for researching in-vivo micro organ on molecular and cellular level is invented.

The invention discloses a tissue culture method for cordia dichotoma. The tissue culture method comprises the following steps: (1) explant processing; (2) callus culture; (3) bud induction culture; (4) rooting culture; (5) transplantation seedbed culture; (6) seedbed management. The tissue culture method for the cordia dichotoma has the advantages of short culture period, high breeding speed, quick axillary bud differentiation, rapid rooting, developed root systems and the like, the survival rate of the cultured cordia dichotoma seedling is up to 95% or above, and a transplantation survival rate is 92% or above. Compared with traditional seed propagation, cutting seedling or seedling culture, tissue culture is more favorable for realizing the engineering seedling of the cordia dichotoma, the defects of slow growth and long culture period of the cordia dichotoma are overcome, the method is favorable for promoting plantation of the cordia dichotoma, and a new thought is provided for thefurther expanded culture of the cordia dichotoma.

The invention discloses a self-cleaning method of a household scrubber. The self-cleaning method comprises the following steps: (1) closing a liquid spraying device; (2) keeping a motor of a main machine to be started, and sucking a liquid flowing through a rolling brush into a liquid suction pipeline; and (3) starting the liquid spraying device again, and spray the liquid to the rolling brush at least once; and then closing the liquid spraying device. After the liquid spraying device, the rolling brush motor and the main machine motor are closed, the liquid spraying device is started again, the liquid is sprayed to the rolling brush for at least one time, then the liquid spraying device is closed, and the whole self-cleaning operation is finished so that dirt (especially garbage with high viscosity) can be prevented from being adhered to a nozzle, and the problem that the nozzle is blocked is avoided.

The invention provides a porcine reproductive and respiratory syndrome virus recombinant vaccine strain PRRSV-SP as well as a preparation method and application thereof. The T3448A site of a vaccine strain SP is mutated to obtain the recombinant vaccine strain PRRSV-SP. According to the method, genes ORF5 and ORF6 of main structural proteins GP5 and M of a highly pathogenic porcine reproductive and respiratory syndrome virus Hubei isolate strain HUB2 are put into corresponding coding regions of the recombinant vaccine strain PRRSV-SP for expression, so that a chimeric toxic strain vSP-Hub2 isobtained. The recombinant vaccine strain PRRSV-SP and the chimeric toxic strain vSP-Hub2 provided by the invention have no obvious pathogenicity, can be used as the basic material for further studyingthe mutation mechanism of an attenuated vaccine and a PRRSV toxic strain, can construct a novel attenuated vaccine strain through an infectious cloning system, and can be used for preparing a novel,efficient and broad-spectrum vaccine against PRRSV homologous and heterologous toxic strains.

The invention discloses a method, a system and a device for realizing anonymous speed-dating, which are implemented through the steps that: a server receives anonymous information sent by each user; and after an acquisition request sent by a user is received, if anonymous information which is still not be acquired exists, the server preferentially distributes the anonymous information with the sent time far away from the current time to the user sending the acquisition request, so that each anonymous information can be processed timely.

The invention discloses a cosmetic brush washing device and a control method thereof, and the device comprises a body and a container structure which is provided with a lead-out hole at the bottom and is used for accommodating liquid; a cleaning device used for fixing and driving a cosmetic brush to perform cleaning operation or spin-drying operation; a drainage device connected with the lead-out hole and used for draining the liquid in the body; a controller arranged in the body and used for controlling the cleaning device and the drainage device; and a control end electrically connected with the controller and used for issuing a command to the controller; The cosmetic brush can be automatically cleaned and dried in the whole process, people do not need to stay beside equipment, time is not wasted, and therefore the product is especially suitable for the current fast pace; a cleaning mode and a spin-drying mode can be freely selected and set, and the product is suitable for cosmetic brushes made of different materials; due to the design of automatic cover opening, the cleaned cosmetic brush can be in contact with circulating air, and bacteria breeding of the cosmetic brush in humid air is avoided.

The invention discloses a method for alternately breeding South America white shrimps and giant freshwater prawns for three batches in a pond greenhouse. The method comprises the steps of building the pond greenhouse, cleaning and sterilizing the pond greenhouse, breeding the South America white shrimps and the giant freshwater prawns in a small shed, arranging offspring throwing time of the three batches, throwing fodder, managing water quality, supplementing oxygen in a combination mode, preventing and controlling diseases, and fishing the South America white shrimps and giant freshwater prawns of the three batches. The method is characterized in that the small shed is built in the greenhouse, and the offsprings are thrown to a pond after being bred in the small shed in a storing mode; the offsprings of the South America white shrimps of the first batch are thrown from March 18th to March 22nd, the offsprings of the South America white shrimps of the second batch are thrown from July 1st to July 6th, and the offsprings of the giant freshwater prawns of the third batch are thrown from October 20th to October 22nd; the first fishing time of the South America white shrimps of the first batch starts from May 20th to May 25th, and the last fishing time of the South America white shrimps of the first batch and pond clearing start from June 10th to June 20th; the first fishing time of the South America white shrimps of the second batch starts from October 5th to October 10th, and the last fishing time of the South America white shrimps of the second batch and pond clearing start from October 18th to October 20th; the first fishing time of the giant freshwater prawns of the third batch starts from November 18th to November 20th, and the last fishing time of the giant freshwater prawns of the third batch and pond clearing start from December 18th to December 25th.

The invention discloses a rolling brush self-cleaning device and a self-cleaning method, and the method comprises the following steps: a controller receives a starting signal, and starts a self-cleaning process; the self-cleaning procedure is used for cleaning a rolling brush, a rolling brush scraper and a liquid spraying runner in cleaning equipment; the self-cleaning procedure comprises a first reverse rotation step, wherein a rolling brush motor is controlled to drive a rolling brush to reversely rotate for a first preset time. Various cleaning modes can be selected according to actual conditions, the reverse rotation time, the rotation speed and the liquid spraying amount of the rolling brush can be adjusted, and the rolling brush, the rolling brush scraper and the liquid spraying flow channel can be cleaned in a full-automatic mode; the problem that in the prior art, a self-cleaning device and method cannot clean a rolling brush scraper and a liquid spraying flow channel is solved, the problem that manual cleaning wastes time and labor is solved, all-directional cleaning is achieved, and the remarkable effect is achieved.

The invention discloses a method for cultivating living mushroom flowers through a box special for edible mushrooms for direct selling on the market, and belongs to the technical field of artificial cultivation of boxes special for edible mushrooms. A traditional edible mushroom planting method is complex to operate and high in cost, and consumes labor and time. The method comprises the steps of 1, feeding and sowing, 2, cultivation management, 3, box pressing with building blocks, 4, fruiting management and 5, selling on the market. The method is used for planting the fresh mushroom flowers through the box special for the artificial edible mushrooms in the mode of simulating the wild for directly selling the edible mushrooms on the market, the cultivating procedure of the edible mushrooms can be simplified, the yield and quality of the edible mushrooms and the sales volume of products can be improved, a new selling method is provided, the edible mushrooms can be produced by factories in a large scale more conveniently, work days are reduced, investment is saved, and the economic benefits of mushroom farmers are obviously improved.

The invention discloses a floor brush for a floor scrubber, the floor brush is provided with a front end and a rear end, and the front end of the floor brush is provided with a scraping strip; the scraping strip is at least provided with the following two working positions: (1) a water scraping working position: when the floor brush moves backwards, the scraping strip is changed into a basically downward state, and the bottom end of the scraping strip is propped against a cleaned surface so as to scrape water stains on the cleaned surface; and (2) a suspended working position: when the floor brush moves forwards, the scraping strip is in a suspended state, and the bottom end of the scraping strip is far away from the cleaned surface. The floor brush is particularly suitable for a household floor washing machine, the scraping strip is arranged at the front end of the floor brush, water on a cleaned face can be scraped off when the floor brush moves backwards, and therefore water stain residues are avoided.

The invention discloses a full-automatic cleaning method for a cosmetic brush. The method comprises the following steps: (1) clamping a handle of the cosmetic brush in a clamping mechanism, then putting the handle into a cleaning container filled with cleaning liquid, and immersing bristles of the cosmetic brush into the cleaning liquid; (2) starting a driving mechanism to drive the clamping mechanism and the cosmetic brush to rotate, so that bristles of the cosmetic brush are cleaned up under rotation due to friction force between the bristles and the cleaning liquid; (3) discharging the liquid in the cleaning container; and (4) starting the driving mechanism and a sterilization program, and driving the clamping mechanism and the cosmetic brush to rotate, so that bristles of the cosmetic brush are spin-dried under the driving of rotating centrifugal force. The method can realize automatic cleaning and drying in the whole process, and is particularly suitable for the current fast pace.

The invention discloses a method for establishing alfalfa grasslands at cold regions, comprising the following steps of: seeding preparation: namely selecting stub land of which the preceding stubs oat or highland barley or rape are closely planted crops, ploughing and harrowing soil, manuring barnyard manure, and weeding; selecting alfalfa varieties such as gold queen, Algonquin, Alfaking, Juren201 and Gannong 1 which have strong cold resisting ability; alfalfa seeding, namely seeding in early May, and raking the soil smooth before being frozen, wherein the seeding row spacing is 30 to 40 centimeters, the seeding ditch depth is 10 to 15 centimeters, the seeding quantity is 37.5 to 45kg per hectometer, the seeding depth is about 2 centimeters and the thickness of soil cover is about 2cm; establishing management, namely weeding when the height of alfalfa plants is about 10 centimeters and then watering and manuring the barnyard manure or a phosphaticfertilizer; grassland mowing, namely mowing in early October in the first year, and moving the first stubs in middle July during bud stage or initial bloom stage in which stubble height is about 5cm, and the second stubs in late September at full-bloom stage in which the stubble height is 7-8cm in the next year; and winter irrigation, namely performing winter irrigation before the soil is frozen. By selecting cold-resistant alfalfa varieties and suitable cold-resistant planting method, the alfalfa can smoothly live through a first winter and spring, the aim of establishing the alfalfa grasslands at the cold regions is fulfilled, and the problems of leguminous forage deficiency and nutritional imbalance of domestic animals atthe cold regions are solved.