286results about How to "Effective consumption" patented technology

The invention discloses an optimizing and dispatching method for microgrid economical operation on the basis of multiple time scale coordination, comprising the following steps: dividing microgrid economical operation into two time scales, namely a dayahead plan and real-time dispatching; in the dayahead plan, dividing one dispatching period into a plurality of time intervals, and modelling into a mixed integer linear programming program based on the dayahead prediction data; and during the real-time dispatching period, complying with the startup and halt result of the dayahead plan, and modelling into a nonlinear plan based on real-time ultra-short term prediction data. In the optimizing and dispatching method, the coordinated mechanism of two time scales is designed, the dispatching scheme obtained with the method not only can satisfy the economic factors of a long time scale but also can satisfy safe operation constraints, such as the inner microgrid voltage, carrying capacity and the like of short time scales, and the capacity fluctuation of new energy is smoothened. The method is suitable for optimizing and dispatching economical operation in the parallel and single network operation of a micro power grid composed of a controllable power supply, an uncontrolled power supply and energy storage equipment of any type and any volume proportion.

The invention discloses a multi-time-scale grid-source-load-storage coordinated control method comprising the following steps that (1) the adjustable resources existing in a power distribution network and the adjustment scope under different time scales are analyzed; (2) a day-ahead optimization model is established; (3) day-ahead optimization is performed on the distributed power supplies, energy storage and flexible load under the active power distribution network by using a particle swarm algorithm according to the day-ahead optimization model and day-ahead forecasting information so as to ensure the total operation cost to be minimal within the optimization period; (4) an intra-day optimization model is established; and (5) rolling correction is performed on the operation state of the distributed power supplies, energy storage and the flexible load and the operation mode of the power distribution network of the current period of time according to the power flow distribution situation of the current power distribution network, the node voltage situation, the operation state of the distributed energy and the charge and discharge situation of energy storage with combination of ultrashort-term load forecasting and power generation forecasting. The effect of multiple adjustable and controllable resources in operation of the active power distribution network can be fully exerted so as to guarantee effective consumption and efficient utilization of the distributed power supplies.

The invention provides a combined heat and power optimization method and system for promoting wind power consumption. The method comprises the steps that heat demand values of heat supply areas are predicted, and pipe network heat losses of heat network connection areas are obtained; according to the heat demand values and the pipe network heat losses, a thermoelectric coupling model of a thermoelectric cogeneration unit is established, a power generation scheduling model is established according to output power prediction values of a thermal power generating unit and a wind power plant; according to the thermoelectric coupling model, the power generation scheduling model, thermal equipment, power load and heat load, a combined heat and power optimization model is established; according to the combined heat and power optimization model, heat supply plans of the thermoelectric cogeneration unit and the thermal equipment and power generation plans of the thermal power generating unit and the wind power plant are determined. Compared with the prior art, the combined heat and power optimization method and system for promoting wind power consumption weakens a power grid dispatching mode of ordering power by heat, improves the peak load regulation capacity of a power grid, further effectively consumes wind power and decreases waste wind power quantity.

The invention relates to a nano-material mixed modified superhigh-temperature high-performance well cementing slurry system and a preparation method thereof. The slurry system comprises the followingingredients in parts by weight: 100 parts of oil well cement, 15-25 parts of coarse silica sand, 15-20 parts of fine silica sand, 1-10 parts of nano-silicon dioxide, 1-10 parts of nano-calcium carbonate, 0.2-1 part of a defoaming agent, 4-10 parts of a fluid loss agent, 0-3 parts of a drag reduction agent, 0.5-4 parts of a retarder and 30-100 parts of water. In the slurry system, set cement has excellent compressive strength and toughness under superhigh temperature, and the compressive strength and the elasticity modulus cannot be obviously changed as the maintenance time is prolonged. The slurry system has good rheological property, lower water loss and proper thickening time, and the comprehensive properties of the slurry system can completely meet the related requirements of site wellcementing construction, so that the technical support is provided for well cementing under high temperature. A nano-material obtained by mixing the nano-silicon dioxide and the nano-calcium carbonateis added, and micropores of the set cement can be effectively filled, so that the system becomes denser. Therefore, the volume shrinkage of the set cement is relieved.

The invention relates to a blood nourishing and essence strengthening health paste preparation method, wherein the blood nourishing and essence strengthening health paste specifically comprises oats, black rice, red dates, black sesame, black beans, soybeans and rock candy. The preparation process comprises: carrying out low temperature baking on the raw materials to achieve a completely-cooked state, mixing, and crushing to obtain the finished product paste raw material. According to the present invention, the low temperature baking is used, such that it can be ensured that the nutrients of the raw materials are not lost, no odor is generated, the aroma is mellow, and the excessive internal heat can not be produced after eating the paste; and each raw material is rich in nutrition, and the six raw materials are combined to prepare the paste product, such that the health effect is significant, and the paste product becomes the health paste product with characteristics of uniqueness, high quality, and balanced nutrition.

The invention discloses a method for extracting vanadium from stone coal pickle liquor. The technical process mainly comprises the steps of extracting the stone coal pickle liquor subjected to aluminum removal through an acidic phosphate ester extracting agent solvent to remove ferric iron, enriching the vanadium through the acidic phosphate ester extracting agent solvent after the iron is removed and the pH of the liquor is adjusted, neutralizing precipitates with the vanadium-enriched liquor to obtain vanadium dioxide hydrate, refining the vanadium dioxide hydrate, calcining the refined vanadium dioxide hydrate to obtain a vanadium oxide product and the like. The method for extracting the vanadium from stone coal pickle liquor has the advantages of short technical flow, low consumption of reagents, low production cost, high product quality, environment friendliness and the like.

The invention discloses a photovoltaic intelligent community electric automobile and controllable load two-stage optimization scheduling method. A controllable load output model is established based on residential area, controllable load use characteristics and laws of thermodynamics, an electric automobile charging model is established based on electric automobile user driving characteristics, and a photovoltaic probability model is established based on the condition that photovoltaic output forecast deviations meet normal distribution; in day-ahead scheduling, time-of-use electricity price is set with profit maximization of an operator obtained after orderly charging of electric automobiles being as a target, and the electric automobiles are guided to be charged orderly through the time-of-use electricity price to reduce system valley-peak difference; taking consideration of influence of photovoltaic prediction and temperature prediction deviation on intelligent community electric automobile and controllable load co-scheduling, supply and demand unbalance due to day-ahead predication is corrected by introducing real-time scheduling; and in real-time scheduling, with the time-of-use electricity price set in day-ahead scheduling being as a basis, a day-ahead charging scheme of the electric automobiles is optimized to reduce real-time scheduling cost and stabilize load fluctuation. The method comprises day-ahead scheduling and real-time scheduling two-stage optimization.

The invention discloses a distributed event detection method based on a correlation. The temporal correlation of data is analyzed in nodes through a clustering structure based on the locality of a wireless sensor network event area, the spatial correlation of the data is analyzed between adjacent nodes, and the node where an event happens is recognized. The abnormal correlation of the nodes is analyzed through the histogram method, and the detecting accuracy is improved. Due to the fact that the summary information of a histogram is transmitted among the nodes, the communication energy consumption among the nodes is reduced. The occurrence of new events can be effectively detected, the method has a low false alarm rate and low energy consumption, and compared with a centralized abnormality detection method, the distributed event detection method based on the correlation has the advantages of being high in detection performance and obviously reducing communication cost.

Disclosed is a distributed routing protocol method for three-dimensional underwater acoustic sensor networks. Supposing that each node knows its own geographic location and channels are bidirectional and symmetrical, transponding cost is calculated and transponding nodes are selected according to factors such as the node location, utilization rate of the channel, energy, and the like when data transponding is required. Node energy is used as effectively as possible on the premise that other network performances are not affected, and balanced use of the energy of each node and the utilization rate of the underwater acoustic channel are considered. The purpose is to use the channel effectively so as to minimize energy consumption, improve the utilization rate of the energy and the channel of the networks, and prolong the service life of the whole networks.

The invention relates to a low temperature sintering boride-based ceramic material and a preparation method thereof. The invention solves the problem of over high sintering temperature and pressure and low sintered density of the boride-based ceramic material in the prior art. The boride-based ceramic material is prepared by boride powders, carborundum powders and additives which are the mixture powders of alumina and yttria. The method is as follows: first, the boride powders, the carborundum powders and additives are mixed; second, the mixture is put in absolute ethyl alcohol for ultrasonic cleaning and dispersion, ball mill mixing and drying; and third, the mixture is cooled after hot-press sintering. The prepared low-temperature boride-based ceramic material after sintering at the condition of 1800 DEG C to 1850 DEG C and 30 Mpa are uniform and compact in structure, small in grain size and strong in mechanical property simultaneously, the relative density is above 96 percent and the intensity and toughness are respectively reach 786MPa and 7.12 MPam<1 / 2>. The method is simple and practical in technology, low in cost and easy for popularization.

The invention discloses a movable air conditioner and a condensate water removing control method and device and condensate water removing system of the movable air conditioner. The movable air conditioner comprises a refrigerant circulating system, a liquid storage tank for storing condensate water, a water fluttering wheel located in the liquid storage tank, a water fluttering motor and a water pump. The condensate water removing control method comprises the steps that the water level information of the condensate water in the liquid storage tank is collected; and the water pump and the water fluttering motor are controlled according to the water level information and the operating mode of the movable air conditioner, wherein in a refrigeration mode, a first water level threshold value is achieved by responding to the water level of the condensate water in the liquid storage tank, a water fluttering motor operation command is executed so as to drive the water fluttering wheel to rotate, the water pump is controlled to be started by responding to the water fluttering motor operation command so as to spray the condensate water in the liquid storage tank to the water fluttering wheel, and the condensate water is removed through the water fluttering wheel. The consumption capacity of the condensate water in the refrigeration mode can be effectively improved, the effect is more obvious especially for the condition that the environment humidity is large, the fault of water leaking is avoided, and normal use is guaranteed.

The invention provides a PVA (polyvinyl alcohol) fiber reinforced superhigh-toughness polymer-based composite material. The PVA fiber reinforced superhigh-toughness polymer-based composite material is prepared from the following raw materials in parts by weight: 542 parts of low-calcium fly ash, 136 parts of high-calcium fly ash, 0 to 20 parts of metakaolin, 183 to 203 parts of quartz sand, 160 parts of water, 38 parts of sodium hydroxide, 14 to 17 parts of PVA fiber, and 173 parts of sodium silicate. The invention also provides a preparation method of the superhigh-toughness polymer-based composite material. The superhigh-toughness polymer-based composite material has the advantages that cement is replaced with a large amount of industrial waste slag fly ash, industrial wastes are changed into valuables, the environment is effectively protected, the consumption of energy source is decreased, and the emission of carbon dioxide is reduced; the toughness of the polymer-based composite material is reinforced by the PVA, the defect of poor ductility of the traditional polymer-based composite material is overcome, and the polymer-based composite material is conveniently popularized and applied in the engineering field of China.

The invention relates to a plant cultivation structure and method, in particular to a cultivation structure and method for increasing a plant survival rate in a desert area. The cultivation structure comprises a base layer, an impermeable layer, an improved substrate layer, an irrigation layer and an evaporation prevention layer sequentially from the bottom up, wherein the base layer is desert raw soil; the impermeable layer is formed by mixing clay and the desert raw soil; the improved substrate layer comprises park waste, agricultural waste, mushroom bran, bacterial manure and the desert raw soil; the irrigation layer comprises an irrigation pipe; and the evaporation prevention layer is made from wheat reeds. The method comprises the step of cultivating a plant with the soil structure. The structure and the method have the advantages of improving the soil, keeping moisture and increasing the plant cultivation survival rate in the desert area.

The invention relates to an energy-saving illuminating system which utilizes environment-friendly energy and an intelligent energy management system. By the energy-saving illuminating system, energy loss can be saved, and pollution can be controlled. In the system, solar energy, energy-saving cells and non-pollution light-emitting diodes with long service life are utilized. Equipment and a sensor are coordinated by a microprocessor to optimize the operation of the system, so that the system emits light. The process comprises the following steps of: sensing an environment; selecting an energy mode; determining the output of the energy; and generating sufficient light according to different aims. Simultaneously, the energy-saving illuminating system has the function of infinite remote control and wireless communication.

The invention relates to the field of utilization of fly ash acid-process aluminum extraction residues and fly ash and discloses a method for preparing a NaY-type molecular sieve and a ZSM-5 type molecular sieve by use of fly ash acid-process aluminum extraction residues and a utilization method of fly ash. The method comprises the following steps: (1) performing alkaline-process roasting of the fly ash acid-process aluminum extraction residues to obtain roasted slag, and sequentially performing high-temperature water leaching and heat-preserving filtration of the roasted slag to obtain a first filtrate; (2) performing NaY-type molecular sieve hydrothermal crystallization of the first filtrate to obtain a NaY-type molecular sieve and a molecular sieve filtrate; and (3) performing ZSM-5 type molecular sieve hydrothermal crystallization of the molecular sieve filtrate to obtain a ZSM-5 type molecular sieve and a second filtrate. The consumption of the fly ash acid-process aluminum extraction residues is realized, and the utilization rates of the fly ash acid-process aluminum extraction residues and the fly ash are increased.

The invention belongs to the field of building materials, and in particular relates to anti-crack plaster mortar for an outer wall of a building and a method for preparing the anti-crack plaster mortar. The anti-crack plaster mortar for the outer wall of the building comprises the following raw materials in percentage by weight: 30 to 40 percent of cement, 4 to 10 percent of blend, 30 to 55 percent of fine aggregate, 8 to 15 percent of heavy calcium carbonate, 2 to 5 percent of polymer rubber powder, 0.4 to 1.2 percent of anti-crack fiber, 0.2 to 0.6 percent of wood fiber and 0.4 to 1.2 percent of a thixotropic lubricant. The anti-crack plaster mortar for the outer wall of the building is high in tensile adhesive strength and high in workability and flexibility; a water leakage crack is not formed in plaster after eighty high-temperature to water-spraying cycles and thirty heating to freezing cycles; phenomena of chalking, hollowing, peeling and the like are avoided; the anti-crack plaster mortar is high in crack resistance, good in construction property and low in cost, and does not stick to a tool during construction.

The invention relates to a fiber laser hydrophone. The fiber laser hydrophone comprises a fiber containing an active fiber grating, two elastic films, a cylinder, an end head and a sheath, wherein theelastic films comprise upper films, lower films and supporting columns, the elastic films are provided with through fiber holes, the through fiber holes are through holes penetrating through the upper films, the lower films and the supporting columns, and the two elastic films are respectively connected with two ends of the cylinder. The two elastic films are added to the fiber laser hydrophone,structures of the elastic films are specially designed, low frequency sound signals can be better picked up, absorption capability of energy generated because of acceleration is stronger, kinetic energy generated because of acceleration can be more effectively consumed, inhibition of acceleration response is facilitated, fine linear demands for the fiber laser hydrophone in practical application are adapted, on the condition that low frequency high sensitivity is guaranteed, the diameter is reduced, the fiber laser hydrophone can be better applied to a super-fine hydrophone array system, and the fiber laser hydrophone is suitable for micro underground mobile platforms.

The invention discloses a quicksand type energy dissipation shock absorption and damping hybrid device. The device comprises a damper and an installing plate. The damper is provided with a cavity and fixed to the upper surface of the installing plate. The lower surface of the installing plate is connected with a building structural component. A cavity of the damper is filled with a plurality of balls and / or cobblestones and a mixture of sand and water. The device integrates the advantages of a tuned liquid damper, the advantages of a tuned mass damper, the advantages of a viscous damper and the advantages of a particle damper, is good in energy dissipation effect and has high applicability in the constructional engineering anti-seismic and wind resistance fields.

The invention discloses a threat information exchange sharing method based on a block chain, and the method comprises the steps: 1),a threat information block chain system is set with the system comprising comprises a threat information block chain, a synchronization node, and a plurality of maintenance nodes; a user registers as a threat information block chain user, and obtains a corresponding public key and a corresponding private key; 2) a threat information producer sets intelligent contract content on the system, signs the intelligent contract content with a private key and then issues the intelligent contract content to a threat information block chain; 3) the intelligent contract content signed issued by the information consumer synchronously is threatened, a private key used to sign and the content is broadcast through the system; 4) a maintenance node analyzes the content in the smart contract and packages the content into a new threat information block A; 5) a block A is broadcasted to the system, the maintenance node adds the block A to the threat information block chain after consensus of the block A is achieved, and 6) the maintenance node achieves consensus after confirming the effectiveness of the smart contract, creates a new block B and broadcasts a new block B through the system.

The present invention relates to solid-liquid reaction process of solid ammonium chloride and sulfuric acid to obtain high grade ammonium bisulfate and hydrogen chloride gas, and the process has molar ratio between ammonium chloride and sulfuric acid of 1 to 0.9-1.1, concentration of sulfuric acid of 93-98 wt%, reaction temperature of 60-130 deg.c and reaction time of 5-60 min. The process may have ammonium chloride as the by product of sodium carbonate producing process and industrial sulfuric acid as the material. The produced hydrogen chloride gas may be absorbed with water to produce hydrochloric acid or further desorbed and refined to obtain anhydrous hydrogen chloride, and the produced ammonium bisulfate may be aminated to obtain ammonium sulfate. The process is simple, has easy control and no waste discharge, and provides one new way for best utilization of nitrogen element and chlorine element in ammonium chloride.

The invention discloses an environment-friendly high-adhesion-stress special putty for ceramic tile surfaces and a preparation method thereof. The special putty comprises the following raw materials in parts by weight: 35-40 parts of white portland cement, 5-10 parts of boiler residue, 15-30 parts of quartz powder, 15-30 parts of heavy calcium carbonate, 5-10 parts of ash calcium powder, 4-8 parts of dispersible emulsion powder, 0.3-1 part of water-soluble cellulose, 1-3 parts of wood fiber, and 2-4 parts of a slipping agent. According to the invention, by taking the boiler residue as an additive, the adhesion strength of the putty is improved, and industrial wastes can be effectively consumed so as to improve the ecological environment, therefore, the putty has a board industrial application prospect. The putty has excellent water resistance, alkali resistance, and low-temperature resistance, and also has the advantages that the putty after being subjected to blade coating is not easy to crack, does not fall off, and is not discolored; and the manufacturing cost of the putty is low, and the variety and application scope of the putty are expanded.

The invention relates to the field of utilization of coal ash acid-method extracted aluminum residues and coal ash, and discloses a method for preparing a P-type molecular sieve and a ZSM-5 (Zeolite Socony Mobil-5) molecular sieve from coal ash acid-method extracted aluminum residues and a use method of coal ash. The method comprises the following steps: (1) performing alkali roasting on the coal ash acid-method extracted aluminum residues so as to obtain a roasted residue material, performing high-temperature water leaching and heat-preservation filtration on the roasted residue material in sequence so as to obtain first filtrate; (2) performing P-type molecular sieve hydrothermal crystallization on the first filtrate so as to obtain a P-type molecular sieve and molecular sieve filtrate; and (3) performing ZSM-5 type molecular sieve hydrothermal crystallization on the molecular sieve filtrate, thereby obtaining the ZSM-5 molecular sieve and second filtrate. By adopting the method, elimination of the coal ash acid-method extracted aluminum residues can be achieved, the utilization rate of the coal ash acid-method extracted aluminum residues can be increased, and the utilization of the coal ash can be improved.

The invention relates to a method to sinter building block by mud in oil field, including the steps: 1), batching: according to weight ratio, clay 20-80, mud 20-80, and additional auxiliary material 0.1-30% of the total weight of the clay and mud, where the content of the soluble salt is below 0.5% of the total weight; 2) mixing: two modes: one, dry or wet mixing; two, wet mixing; 3), ageing: 1-7 days; 4), molding: adopting half-dry pressing or dry pressing, where the molding pressure is greater than 4.0MPa; 5), drying; 6), sintering: placing the dried preparation into the high temperature furnace for baking, wherein the sintering temperature 800-1200 deg.C, preserving heat for 1-3 hours in the high temperature region and then cooling with the furnace to obtain the products.

The invention relates to the field of fly ash acid process aluminum extraction residue or fly ash utilization, and discloses a method for preparing sodalite and a ZSM-5 molecular sieve from fly ash acid process aluminum extraction residue and a fly ash utilization method. The method comprises the following steps of (1) performing alkaline process roasting on the fly ash acid process aluminum extraction residue to obtain roasting residue materials; (2) performing high-temperature water soaking dissolution reaction on the roasting residue materials to obtain a water soaking product; (3) preparing the water soaking product into sodalite synthesis mother liquid, and performing sodalite hydrothermal crystallization on the sodalite synthesis mother liquid to obtain sodalite powder and first filter liquid; and (4) performing ZSM-5 molecular sieve hydrothermal crystallization on the first filter liquid to obtain the ZSM-5 molecular sieve and second filter liquid. The goals of utilizing the fly ash acid process aluminum extraction residue, improving the utilization rate of the fly ash acid process aluminum extraction residue and utilizing the fly ash are achieved.

The invention provides a power system source-load-storage coordinated rolling scheduling method based on flexibility margin, and relates to the field of power generation scheduling of power systems. The method comprises the following steps: firstly, determining an uncertain interval of wind power output and load, and establishing a flexible supply capacity model corresponding to each flexible resource; on the basis, respectively establishing a power system flexibility demand capacity model and a flexibility supply capacity model, and determining a flexibility margin index; then establishing asource load storage day-ahead coordination scheduling model and solving; and in each rolling period in the day, establishing and solving a source load storage intra-day rolling scheduling model of therolling period, and finally obtaining a scheduling result of each intra-day rolling period. Flexible resources such as a wind turbine generator, a thermal power generating unit, a gas-electric unit,a pumped storage unit and an interruptible load are taken into consideration, actual engineering can be effectively met through the scheduling plan formulated by the invention, and the operation economy and reliability of a power system are optimized.

The invention relates to the technical field of building construction, and in particular to a construction device used for on-rail traveling type prefabricated joist steel. The construction device comprises a first supporting frame, rotation connecting bases are installed at the left end and the right end of the first supporting frame through bearings, supporting bases are fixedly installed on thelower parts of the rotation connecting bases through bolts, rolling wheels matched with an outside rail are installed on the supporting base through bearings, and gears which mesh with racks on the outside rail are integrally formed on the outer sides of the rolling wheels. The construction device used for the on-rail traveling type prefabricated joist steel has the beneficial effects that the construction device used for the prefabricated joist steel carries the prefabricated joist steel for a long distance to effectively reduce the consumption of the labor, rail transportation can effectively reduce the consumption of energy at the same time, and the construction device can further effectively transport the prefabricated joist steel to the supporting height and position, so that the prefabricated joist steel can be installed at the high position conveniently, the detachment is facilitated, and the construction device can be adapted to carrying of joist steel of different sizes and has high practical value.

The invention discloses a rubbish landfill site intermediate covering layer and a preparation method and application for the rubbish landfill site intermediate covering layer and belongs to the technical field of rubbish landfill. The intermediate covering layer comprises at least three layers of function layers arranged in a stacked manner, each function layer comprises a water storage layer, a discharge guiding layer and a low permeability layer from outside to inside in sequence, the water storage layers are mainly composed of recycled fine aggregate with the particle size being less than 5mm, the discharge guiding layers are mainly composed of recycled coarse aggregate with the particle size being 10-40 mm, the low permeability layers are mainly composed of renewable powder with the particle size being less than 2 mm, and the recycled fine aggregate, the recycled coarse aggregate and the renewable powder are all obtained by processing building rubbish. By means of the intermediatecovering layer, mechanical properties of a rubbish body are improved, and the intermediate covering layer provides a certain degree of anti-permeability and air-tight function serving as temporary covering, because used materials are all landfill building rubbish in landfill sites, 'filling rubbish with rubbish', recycling utilization of the building rubbish is realized, and the rubbish landfillsite intermediate covering layer and the preparation method and application for the rubbish landfill site intermediate covering layer have the characteristics of being convenient to draw materials, low in cost, capable of saving energy, environmentally friendly, good in durability and the like.

The invention discloses a recirculating aquaculture system in an intensive pond. The system comprises the pond, wherein the pond is sequentially divided into a high-density aquiculture area, a solid particle purification area and a water quality purification area along the clockwise direction of the pond; the water surface area of the high-density aquiculture area accounts for 5% of the water surface area of the whole pond; the water surface area of the solid particle purification area accounts for 20% of the water surface area of the whole pond; the water surface area of the water quality purification area accounts for 75% of the water surface area of the whole pond; and the water quality purification area is mainly used for deeply purifying a relatively clean water body at the upper partof the aquaculture pond and a water body purified by the solid particle purification area. According to the system, sewage collection efficiency is high, fishes are not easily scratched, excrement and residual bait can be effectively consumed, the water purification efficiency is high; and as no need of arranging an excrement tank at a ridge side of the pond, energy saving and environment-friendliness are achieved, economic output is high, the effect of the nutrition level of an aquatic animal food chain is achieved.

The invention discloses a helicopter undercarriage with the protection function; the undercarriage comprises a skid and an arch-shaped beam, the arch-shaped beam is connected to the top wall of the skid, a first supporting rod and a second supporting rod are connected to the inner wall of the arch-shaped beam, and a first supporting plate is rotatably connected to the outer wall of the first supporting rod; a first shock absorber body is connected to the top wall of the first supporting plate, a sleeve is connected to the bottom wall of the first supporting plate, a buffer shock absorption mechanism is arranged in the sleeve, the output end of the buffer shock absorption mechanism penetrates through the sleeve and is connected with a rotating shaft, a machine wheel is connected to the outer wall of the rotating shaft, and a connecting base is connected to the top wall of the arched beam. A supporting beam is connected to the inner wall of the connecting base, and a second buffer damping mechanism is connected to the top wall of the supporting beam; according to the helicopter undercarriage, a good buffering and damping effect can be effectively achieved on the helicopter body during landing, the situation that the helicopter is damaged due to the fact that the helicopter is subjected to high impact force during landing is avoided, and then a good protection effect is effectively achieved on the helicopter body.

The invention relates to a method for consumption of poultry excrement in sandy soil in arid and semi-arid areas, which includes: making decomposed poultry excrement into organic fertilizer, applying the organic fertilizer into a farmland under wheat-corn rotation system, performing basal application of the organic fertilizer 2800-3200kg / 667m<2> in wheat planting seasons, and performing reduced application of pure nitrogen fertilizer 2-3kg; and performing basal application of the organic fertilizer 3000-3500kg / 667m<2> in corn planting seasons under the condition that wheat straws are fully returned to the field, and performing reduced application of nitrogen chemical fertilizer 2.5-3.5kg. Factors such as organic fertilizer resource, climate, hydrological condition and the like are comprehensively considered, organic-inorganic ratio, application time, application manner and the like are determined, and accordingly, poultry excrement from farms can be effectively consumed, input of chemical fertilizer can be saved, application within the load capacity range enables yield of corn and wheat to be increased without affecting crop quality, and environmental pollution can be effectively prevented.