244 results about "North china" patented technology

The invention discloses a greening substrate of quarry waste muck as well as a preparation method and application of the greening substrate. The method comprises the following steps of: selecting the quarry waste muck, artificially sieving with a sieve of 2cm (to remove impurities such as weed), and artificially crushing corn straws to 1-2cm; sealing at a high temperature, and decomposing; proportioning in parts by mass: 40 to 60 parts of muck, 30 to 40 parts of sewage sludge, 10 to 20 parts of straws, 50 to 100g / m<2> of sheep dung, 2 to 6g / m<2> of water holding agent and 15 to 45g / m<2> of bacillus licheniformis fertilizer; and mixing uniformly at normal temperature to obtain the greening substrate. The vegetation substrate or a soil improvement material and a formula can be produced on site, waste soil quantity is reduced, the cost is reduced, and land and vegetation resources are protected; and the greening substrate can be applied to integral greening, local soil dressing greening and bagged greening in semi-humid regions of north China and construction project active regions with seasonal drought, centralized and large rainfall.

The invention provides an audible noise calculating method for a high-voltage direct current electric transmission line of 4 to 8 bundle conducting wires and can effectively solve the audible noise prediction problem of an extra-high-voltage direct current electric transmission line. The calculating method comprises three parts that (1) the surface electric field intensity of the conducting of the high-voltage direct current electric transmission line is calculated; (2) the audible noise level (in summer) of the high-voltage direct current electric transmission line is calculated; and (3) the audible noise level of other seasons is obtained through adding or reducing correction items. The calculating method is simple, the implementation is easy, the audible noise of the direct current line corona of the 4 to 8 bundle conducting wires obtained through the calculation can be preferably coincided with the measuring results of testing line in China through being compared with calculation results of other formulas. The direct current corona audible noise of multiple conducting wires, obtained through calculation by the calculating method provided by the invention can more adapt to the environment climate condition in China. The audible noise calculating method is particularly suitable for the extra-high-voltage direct current corona audible noise calculation when during the 4 to 8 bundle conducting wire adoption in north China.

The invention provides a systematic and standard method for cultivating Dragon fruit in greenhouses in North China. The method comprises the steps of selection of sunlight greenhouses with good thermal insulation performance, fielding planting, field management and the like. The method provided by the invention is appropriate to standardized dragon fruit cultivation in greenhouses in North China, and has the benefit that the existing greenhouse conditions of North China are utilized to cultivate tropical and subtropical fruit trees so as to enrich the variety of crops cultivatable to facilities in North China. Dragon fruit grown according to the method provided by the invention has plump branches and smooth and juicy flesh, and has the advantages of elegant shape, excellent color, sweet flavor, good taste and high output.

The invention discloses a particle zinc fertilizer for plants. The particle zinc fertilizer consists of the following compositions in mass portion: 20 to 30 mass portions of zinc sulfate, 25 to 35 mass portions of simple substance sulfur, 20 to 30 mass portions of humic acid, 15 to 25 mass portions of bentonite, and 3 to 5 mass portions of a liquid caking agent. The particle zinc fertilizer consists of a fertilizer core and an envelope, wherein the fertilizer core consists of the zinc sulfate, the simple substance sulfur, the humic acid and the liquid caking agent; and the envelope consists of the simple substance sulfur and the liquid caking agent. The particle zinc fertilizer is a novel highly-efficient particle zinc fertilizer which is suitable for calcareous soil in north China, and in a culture test of the fertilizer, the particle zinc fertilizer can obviously reduce the pH value of soil by 0.4 to 0.5 unit compared with using common zinc sulfate, and can improve the concentration of effective zinc in the soil by more than 60 percent.

The invention relates to a pig-raising method by utilizing a micro-ecological fermenting bed, in particular to a method of raising pigs by utilizing a micro-ecological fermenting bed. The invention comprises the construction of a pig corral and a manufacture method of the micro-ecological fermenting bed. The formula of raw materials of the micro-ecological fermenting bed is 6-8 bags of scobs per m<3>, 25-35 kg of loess, 0.4-0.5kg of special livestock sized salt and 1kg of original bacterium liquid; operation process: (1) water content of the scobs is tested, which is normally 55 percent to 65 percent; (2) even mixing: a given amount of sized salt and loess are added the measured amount of scobs per m<3>, with the ratio of bacterium to water being 1:175-225, then the original bacterium liquid is sprayed into the well mixed scobs, evenly mixed and added into a pit, and the original bacterium liquid is sprayed onto the surface of the pit once; (3) during the first three days since a pig is in the fermenting bed, the pig is fed with original bacterium liquid and water of the ratio of 1:100 till fixed feeding dosage reaches 1:2000. The invention has positive effects of environment friendliness, availability to feedstuff of full ripeness converted from excrement and saving one third of foodstuff and reducing pig-raising cost, and is suitable for a sunlight greenhouse in north China areas.

The invention discloses an early flight time collaborative optimization method for an area network. The method comprises the steps of firstly designing an approach and departure flight priority rule through comprehensively considering the takeoff and landing time of a flight, a delay condition, a passenger condition and a subsequence flight plan; then acquiring traffic requirement time distribution of an airport and a section based on the approach and departure flight plan information, track prediction information and airport and section capacity information of each airport in the section, andaccordingly distributing time fragment capacities of the airports and the sections; and at last, performing heuristic optimization on the flight time based on the priority rule by comprehensively adopting ground holding and flight time reduction measures under the premise of meeting the airport capacities, approach and departure rates of the airports, and the limitation on the section capacities,and reasonably distributing existing time slot resources. The sample data of the four airports in the North China area is screened for verifying the method provided by the invention. A result shows that the capacity-traffic balance situation can be effectively improved, the hour capacities of the sections and the flight time slot resources are fully utilized, and the delay degree of the flight time is effectively reduced.

A grafting cultivation method of magnolia denudata and magnolia grandiflora relates to the technical field of sapling cultivation. The method comprises breeding two-year or more lignified magnolia denudata branches into scion seedlings in the first year; after the scion seedlings germinates, selecting the scion seedlings which have stocky stems and roots as scions; taking magnolia grandiflora as stocks for grafting through routine methods in March and April in the second year; transplanting the grafted plants in fixed pits to in north China, and after the plants grow two to three years, performing plant transplantation. The grafting cultivation method of the magnolia denudata and the magnolia grandiflora is simple, shortens the defoliation cycle of the magnolia denudata and improves the survival rate of the magnolia denudata; the magnolia denudate cultivated through the method is good in disease-resistant and drought-resistant capacities and particularly applicable to urban afforestation.

The invention relates to an environment-friendly drop irrigation water-saving cultivation method for a winter wheat / summer maize crop rotation system. A winter wheat / summer maize planting spacing anddrop irrigation belt arrangement mode is developed, a water and fertilizer integrated implementation scheme for water conservation and fertilizer saving of the winter wheat / summer maize crop rotationsystem is built, and different agricultural water saving methods, drop irrigation platform automatic control systems, precise positioning tractors and multifunctional all-in-one machines are also used, so that an environment-friendly drop irrigation water-saving cultivation technology for the winter wheat / summer maize crop rotation system suitable for north China plain is formed. The water and fertilizer utilization efficiency is improved, the irrigation cost is reduced, and the effects of increasing the yield and improving the efficiency are achieved.

The invention discloses a special rice fertilizer with both soil improvement and fertilizer efficiency functions for coastal saline soil and a preparation method and application of the special rice fertilizer. The special rice fertilizer comprises the following components in parts by mass: 35-40 parts of humic acid, 15-20 parts of fulvic acid, 20-25 parts of a composite fertilizer, 15-20 parts of a silicon calcium fertilizer, 1-1.5 parts of a urease inhibitor and 1-1.5 parts of a nitrification inhibitor. According to the invention, the application method combines soil culture, root system activation, crop nourishment and fertilizer efficiency improvement, so the rice fertilizer is low in cost, stable in effect, applicable to mechanical operation, not only applicable to coastal intertidal zones, but also applicable to rice planting in saline-alkali soil in north China or even northwest inland.

The invention discloses a low-temperature diesel exhaust reducing agent and a preparation method thereof. The reducing agent is composed of a component A, a component B, a component C and a component D and is characterized in that the components A, B, C and D are dissolved and mixed in a certain ratio. The component A is high-purity water with mass fraction of 40 to 70%; the component B is urea with mass fraction of 20 to 35%; the component C is micromolecular liquid amide with mass fraction of 5 to 20%; and the component D is micromolecular alcohol with mass fraction of 2 to 35%. Compared with a traditional urea reducing agent, the low-temperature diesel exhaust reducing agent can be used at low and ultralow temperature. The freezing point of the prepared reducing agent is lower than -15 to -35 DEG C, has surface tension obviously smaller than common urea reducing agents and is applicable in four seasons in the south China and in spring, summer, autumn, early winter and cold seasons in north China.

The invention relates to a power grid key section automatic searching method with geographical zone boundary optimization taken into consideration, and belongs to the technical field of safe running methods of power systems. Optimization is carried out on geographical zones, power transmission sections are searched, calculation and ranking need to be carried out on the importance degrees of all the sections according to the criteria of the importance degrees after the power transmission sections of the system are obtained to obtain key sections, and the importance degrees are larger if the power flow of the sections is heavier and the margins are smaller, and the sections with the larger importance degrees need to be monitored intensively. According to the power grid key section automatic searching method with the geographical zone boundary optimization taken into consideration, the static stable extreme power flow of the sections is taken as Pimax which is obtained through calculation by using a continuation power flow method. Effectiveness verification is carried out by using the method in a New England 39-node standard system and 500kV system of the North China Power Grid, the key sections obtained by the automatic section searching are identical with the actual running conditions, and thus the accuracy of the method is verified. The power grid key cross-section automatic searching method with geographical zone boundary optimization taken into consideration is fast, and has important significances on the aspect of safety operation of the power system and on the aspect of automatic identification of power transmission sections.

The invention discloses a high-yield cost-saving efficiency-improving northern buckwheat cultivation method. The method includes the following steps of crop rotation, land preparation, variety selection, fertilization, seed treatment, seeding, field management and harvesting. Yield increase and incoming increase of buckwheat are realized by taking comprehensive measures like selecting proper seeding time and reasonable density, mainly applying base fertilizer and seed fertilizer, additionally performing topdressing, mainly using farm manure, additionally using chemical fertilizer and fertilizing proportionally. Experimental demonstration of new buckwheat varieties and the method is performed in part of main buckwheat producing areas in North China, Northwest, Southwest and Northeast and shows that yield is increased remarkably, more than 80% of experimental units realizes yield increase, cost is saved, and benefit is increased remarkably.

The invention provides a honeybee breeding method and belongs to the technical field of animal husbandry. The breeding method includes the following steps: firstly, select a bee breeding place, set up a beehive, and regularly apply acaricide to the beehive to remove bee mites; then, select North China bee, Italian bee and Northeast black bee as parents, Breeding bees with stable and excellent properties as bee species; and feeding feed a made of honey, white sugar, orange juice, tomato juice, longan juice, grape juice, citric acid, edible salt, water, and natural pollen, Feed b made of defatted soybean flour, white sugar and appropriate amount of water. The invention provides a honeybee breeding method. The breeding method is safe and reliable. The North China honeybee, Italian honeybee and Northeast honeybee are scientifically bred to obtain a honeybee with high yield, cold resistance, mite resistance and disease prevention. species, and then fed scientifically and rationally to promote the healthy development of bees, reduce the incidence of morbidity, and improve the quality and food safety of honey.

The invention discloses a ceftriaxone sodium powder-injection for injection. the powder-injection is prepared by the following steps: (1) weighing a ceftriaxone sodium crude raw material at 20 DEG C, adding water, stirring and dissolving, adding active carbon, decolouring, filtering, and washing with mixed solvents; (2) by a particle process crystal product molecular assembly and shape-state optimization technology of North China Pharmaceutical Hebei Huamin Pharmaceutical Co., Ltd., adding a solventing-out agent acetone according to a stream acceleration table at 15 DEG C at the stirring speed of 300 r / min; (3) carrying out suction filtration, washing a filter cake with acetone, putting the filter cake into a vacuum drying oven and carrying out vacuum drying at 30-40 DEG C; and (4) sub-packaging preparations of different specifications, and controlling environmental temperature and humidity until temperature is 20-24 DEG C and humidity is less than 40% so as to obtain the ceftriaxone sodium for injection. In comparison with a traditional technology, ceftriaxone sodium prepared by the above preparation method has advantages of less impurity, high stability and the like.

The invention discloses a method for simultaneously inversing fine particle aerosol optical thickness and aerosol types. The method includes the steps of establishing an aerosol parameter look-up table according to East Asia aerosol types and RT3 vector radiation transmission model, determining an earth polarization reflectivity according to a Maignan BPDF model, inversing to simultaneously obtain PARASOL loading fine particle AOD and aerosol types by combining a PARASOL loading observation radiation brightness, the aerosol parameter look-up table and the BPDF model, verifying the inversion precision of the PARASOL loading fine particle AOD and aerosol types by using AERONET Beijing station and Xianghe Station ground observation data, and drawing a PARASOL loading fine particle AOD thematic map by using ArcMap software. Air quality of North China areas can be accurately inversed, and precision and spatial resolution of PARASOL loading fine particle AOD can be improved. Aerosol types of a researched area can be known, thereby providing technical support for atmosphere quality monitoring of the North China areas.

The invention relates to a cold-proof method of grape, in particular to an overwintering and cold-proof method of outdoor grape. The method is characterized by comprising the following steps of: a. preparing a polystyrene foam grain carpet; and b. paving the polystyrene foam grain carpet under an outdoor grape bracket. The method is unique, is applied to the outdoor grape in the rest period in the North China, adopts the material which is low in price, good in heat preservation, light in weight, low in water absorption, labor-saving, time-saving, and easily paved and furled for preventing late frost in winter, prevents the buds of branches of the outdoor grape in rest period from being frozen and covered, prevents the branches and tendrils of the outdoor grape in rest period from losing water, and prevents the roots of the outdoor grape from being frozen due to the temperature in the covering material.

The invention discloses an afforesting matrix for improving stone-pit waste muck and a preparation method and application of the afforesting matrix. The preparation method includes selecting the stone-pit waste muck, manually or mechanically screening the waste muck by a screen with the bore diameter of 20mm, removing impurities like weeds, matching, by dry weight, 75 parts of the stone-pit waste muck, 5-10 parts of coal ash, 10-15 parts of mineralized waste and 5 parts of sewage mud, and uniformly mixing under normal temperature. Vegetation matrixes or soil improving materials and formulas can be produced on site, waste muck and waste soil quantity can be reduced, cost can be lowered, and land and vegetation resources can be protected. The afforesting matrix can be applied to overall afforestation, local borrowed-soil afforestation and bagged afforestation in semi-humid areas in north China and seasonally-dry and concentrated-rainfall areas where large building projects are carried out.

The present invention discloses a cefuroxime sodium powder preparation for injection. The preparation is prepared by the following steps: (1) preparing a sodium acetate solution by dissolving sodium acetate with a solvent for standby; (2) adding the solvent and water, and adding cefuroxime acid with stirring until complete dissolution; adding activated carbon, decolorizing, filtering, mixing with the solvent, washing the residue and a filter bottle, and filling a crystallization tank with the filtrate; (3) applying the particle process morphology and molecular assembly process crystal product molecular assembly and shape-state optimization technology by Hebei Huamin Pharmaceutical Co. Ltd. of North China Pharmaceutical Co. Ltd., controlling the temperature and stirring speed, and dropwise adding sodium acetate solution; and adding a solvent agent according to the flow rate; (4) carrying out pumping filtration, washing, vacuum drying, weighing, and packing; and 5) packing the preparations in different specifications to obtain the cefuroxime sodium for injection. The cefuroxime sodium powder prepared by the method has the advantages of excellent hydrodynamic performance, perfect crystal shape, uniform particle size distribution, and greatly improved color grade, clarification, purity and stability.

The invention discloses a ceflazidime powder preparation for injection. The ceflazidime powder preparation is prepared by the steps as follows: (1), a raw material ceflazidime dihydrochloride is weighed at the temperature ranging from 5 DEG C to 10 DEG C, distilled water is added, the raw material is stirred to be dissolved, is cooled and is dropwise added with alkaline agent to adjust pH (potential of hydrogen), activated carbon is added, and filtering and washing are performed after decoloration; (2), Hebei Huamin pharmacy limited liability company affiliated to North China pharmaceutical group corporation adopts molecular assembly and morphology optimization techniques of crystal products in the particle process, the stirring speed is 250-300 turns per minute at the temperature ranging from 10 DEG C to 20 DEG C, and acid is added according to a flow acceleration table, so that pH is adjusted; (3), suction filtration, washing, vacuum drying, weighing and sub-packaging are performed; (4), ceflazidime pentahydrate and arginine or sodium carbonate are subjected to powder mixing in a certain weight proportion, environment temperature and humidity are controlled after powder mixing, and sub-packaging of the sterile preparation is performed. The ceflazidime prepared with the preparation method has the advantages of few impurities, high stability and the like.

The invention relates to a bacillus subtilis for preventing and controlling Chinese herbal medicine soil-borne diseases and a preparation method of a bactericide thereof, in particular to a bacillus subtilis and a preparation method of the bactericide thereof. The bacillus subtilis X1 for controlling the Chinese herbal medicine soil-borne diseases is Bacillus with a preservation number of CGMCC No.4037 and a preservation date of 26th, July 2010. The bactericide is prepared by the following steps: inoculating an activated strain to a NYD fluid nutrient medium for enrichment culture to obtain a sterilized solution with 2-4 billion / millimetre in bacterial count concentration. The bacillus subtilis X1 of the invention is a bio-control bacterial strain which is provided with high control effect on the soil-borne diseases and the bactericide can enjoy a prevention rate of 60-80% on the Chinese herbal medicine soil-borne diseases including ginseng root rot, sclerotiniose, North China fritillary sclerotiniose, Schisandra chinensis root rot, seedling blight and the like. The bactericide bio-control preparation is safe and environment-friendly and does not damage drug resistance of nontarget organisms and inductive pathogenic bacteria.

A mining area water resource comprehensive utilization method based on mine water underground storage comprises the following steps of: step 1, determining the hydrogeological parameters of the roof of an underground reservoir; based on the regional geological hydrogeological data, the formation structure of a coal seam roof and the distribution of a water-blocking layer are determined through ground hydrogeological drilling and underground drainage drilling; step 2, determining the water storage system of the underground reservoir; step 3: comprehensively usingthe water resources in the mining area; through the water storage system of the underground reservoir in step 2, external water resources, the underground drainage and the roof water resource are incorporated into the comprehensiveutilization of the water resources, and the water resource utilization is carried out by using aseparate water supply principle; therefore, the method reduces the ineffective discharge of mine water resources and avoids the waste of the water resources; the external purchase of domestic water is reduced, and the related expenses of an enterprises are saved. Finally, the sustainable utilization ofthe mine water resources in the arid ecologically vulnerable area of North China is realized, and the valuable groundwater resources in the area are protected to a maximum extent.

The invention relates to a food for people living requirement, in particular to a north China lobster sauce series and a manufacturing method thereof, which is made from soybeans, peeled peanuts, almonds, fresh gingers, green peppers, various diced melons and vegetables, cooked diced meat (such as pork, beef, chicken, fish and shrimp meat, etc.), salty, sour and sweet flavorings, flour and pure mildew strain. When being manufactured, the soybeans are soaked and cooked; the flour with strain is mixed with the soybeans; natural bacterial colonies and the strain are compounded for producing leaven, the produced leaven is dried, and then spore mycelium is scoured off, and the natural bacterial colonies and the strain are poured into a jar; the mashed fresh gingers, the green peppers in small cluster and the cooked peanuts and the almonds are put into the jar, water and slat are added to be mixed uniformly, and the jar is sealed and put in a ferment room to be fermented under constant temperature for more than two months; after the jar is unsealed, a product is poured out and portioned, the sour and sweet flavorings, the diced melons and vegetables and the cooked diced meat are respectively added. The product is packed by soft and hard cans and is sterilized by high temperature, and the north China lobster sauce series with low salt, intense and delicious taste and multiple flavors are obtained.

The invention relates to an improved MOPSO-based electric taxi newly-built charging station site selection method. An electric taxi newly-built charging station site selection model taking the minimization of the unsatisfied electric taxi charging demand and the minimization of the newly-built charging station fixed cost as the objective functions is constructed, and an improved MOPSO-based model solving method is provided. Meanwhile, in order to solve the performance bottleneck problem when the charge demand is not met, a GPU-based parallel computing algorithm which does not meet the charge demand is designed, and the effectiveness of the GPU-based parallel computing algorithm is verified through experimental comparison; and finally, by taking a certain city in North China as an example, by collecting and processing the related multi-source data, and carrying out application example analysis on the proposed site selection model, it is indicated that the proposed charging station optimized site selection scheme has feasibility, and can provide a beneficial reference for the deep research on the construction and operation of the urban electric taxi charging station.

The invention relates to an afforestation and soil preparation method for water conservation forest in north China, the method comprising following steps: (1) preliminary investigation of a selected water conservation forest area in north China; (2) forest land clearance in the water conservation forest area; (3) in the water conservation forest area, soil preparation with narrow horizontal strips and fish-scale pits along the contour line in an alternate form. According to the afforestation and soil preparation method, by performing investigation on the selection indexes of forest areas and performing soil preparation with narrow horizontal strips and fish-scale pits along the contour line in an alternate form, the soil porosity and infiltration capacity are increased so that soil and water conservation is achieved. The method can be applied under all kinds of terrain conditions. The method has following beneficial effects: small ground-breaking surface and small investment. By use of the method and in the long run, the differences in soil water distribution can be changed; the mechanism of selection through competition between individual vegetation can be promoted; stability and long effectiveness can be maintained; water and soil conservation and water purification can be achieved.

The invention discloses a cryoprotectant applied to facility vegetables and a preparation method thereof. The cryoprotectant consists of the following components in portion by weight: 1 to 2.5 portions of glucose, 0.03 to 2 portions of polyethylene glycol, and 95.5 to 98.97 portions of distilled water. The preparation method comprises the following steps: taking proper quantities of glucose powder, the polyethylene glycol and the distilled water in proportion; dissolving the glucose and the polyethylene glycol into 10 portions of the distilled water respectively for dilution first; after mixing together, adding the rest distilled water; and mixing the mixture evenly, and standing the product at a temperature of 25 DEG C for 1 hour for use. The vegetable cryoprotectant has the advantages of simple preparation, convenient use, labor and time conservation, low cost and obvious effect; and the raw material components not only are the cryoprotectant but also are nutrient substances for the vegetables, have no toxic hazard to the vegetables and no safety threat to human bodies, and are wide applicable to the production of the facility vegetables in north China. The cryoprotectant can prevent and slow down the loss of the vegetables caused by the low temperature and guarantee the production benefit and the stable income for vegetable growers.

The invention relates to a spiral grading sieve, which mainly solves the problems of great abrasion, blockage of sieve pores by North China fritillary root, sieve clinging by fritillary soil of high humidity and low sieving efficiency in conventional sieves. The spiral grading sieve is characterized in that a first layer of sieve surface (6) and a second layer of sieve surface (7) have a 'concave' type formed by parallelly arranged threaded rods (8); threaded ribs and grooves on adjacent threaded rods (8) form sieve pores; the end heads of the threaded rods (8) are fixed with gears (9); gears (9) on adjacent threaded rods (8) are meshed with inert gears (10) under the gears; and belt transmission is adopted between one threaded rod (8) inside the first layer of sieve surface (6) and a diesel engine (3), and between the other threaded rod (8) inside the first layer of sieve surface (6) and a threaded rod (8) inside the second layer of sieve surface (7). The spiral grading sieve has the characteristics of less sieve abrasion, difficult blockage of sieve and high sieving efficiency.

The invention discloses health protection tea and a preparation method thereof. The health protection tea is prepared from raw materials of the stems and leaves of Siberian ginseng which is a natural plant growing in Changbai Mountain, hawthorn leaves in North China and green tea. The health protection tea is developed on the basis of summarizing the traditional Chinese tea making technology by combining the theory of traditional Chinese medicine with the modern nutriology and applying the traditional Chinese medicine processing technology to the traditional tea making technology. The novel health protection tea not only has nutrition and health protection functions, but also can prevent diseases and treat diseases through adjuvant therapy. The health protection tea not only inherits and develops the color, the fragrance, the taste, the appearance and other good qualities of the traditional tea, but also provides a tea delicacy for prompting health, preventing disease and retarding senility for people in the new period. The health protection tea has the efficacies for tonifying the kidney, invigorating the brain, nourishing the heart, soothing the nerves, removing polydipsia, assisting digestion and reducing blood pressure, and especially can exert important efficacy for the prevention and the adjuvant therapy of coronary heart disease, angina and ischemic cardiovascular and cerebrovascular diseases.

The invention discloses a method and a device for safety identification of canal structures in irrigation areas, belonging to the field of water conservancy projects. The method comprises the following steps: acquiring a tree-shaped structure of the irrigation areas, and acquiring a plurality of types of canal structures in the irrigation areas in the tree-shaped structure; presetting multiple identification indexes for each type of the canal structures in the irrigation areas, presetting identification standard and the evaluation method for each identification index of each type of the canal structures in the irrigation areas; and performing safety level identification on the canal structures in the irrigation areas according to the identification indexes, the identification standards and the evaluation methods so as to acquire safety level identification results of all the types of the structures. By adopting the invention, the various types of the structures can be evaluated according to the identification indexes, the identification standards and the preset evaluation methods of the various types of the structures, thereby acquiring accurate safety level identification results of various types of the structures according to actual situations of various types of the structures in south China, north China, humid areas, semi-humid areas, arid areas, semi-arid areas and various types of the irrigation areas.

The invention discloses a method for breeding earthworms by using domestic sludge. The method is characterized by comprising the following steps: performing earlier stage treatment on sludge; preparing an earthworm medium bed and introducing earthworms; adding a mixed sludge material to the surface of the medium bed once every 5 or 7.5 days; spraying a palatability regulation liquid above the medium bed once after the first time of material addition; when the density of the earthworms is 3-4kg / m<2>, harvesting the earthworms, centrally luring grown earthworms once every 15 days, and expanding the bed when the mixed sludge material is 35-40cm high on the medium bed; taking off a high-density earthworm surface layer of 10-15cm thick on one side of the original medium bed and paving on a new medium bed by taking the central line as an axis; exposing the core of the original medium bed after bed expansion, uniformly taking out and piling at an appointed place, and finally resetting and turning over the original medium bed. The method is applicable to cold regions in north China, the problem that domestic sludge cannot be continuously treated because of the cold weather can be solved, the treatment efficiency can be improved, and the bed expansion speed is increased; the method is beneficial to long-term domestication of earthworms, and applicable to industrial large-scale domestic sludge treatment with earthworms.