55results about How to "Good social and economic benefits" patented technology

The invention relates to nm functional material self-cleaning suit face fabric that adopts low temperature plasma surface process technology to take dipping or spraying process with halothane residue triethoxy silicane compound containing nm level solid particle to pure wool or wool terylene blending face fabric to make the face fabric has super water discharging and oil discharging feature to achieve the purpose of self-cleaning. The invention could make the face fabric more handsome and prolong useful life, and it also has great social and economic benefits in environment and energy saving aspects.

The present invention relates to microbial fermentation technology, and is especially a kind of compound microbial fermentation preparation and its preparation process and application in treating solid waste produced in raising farm animal. The compound microbial fermentation preparation includes seven kinds of microbes of bacillus, non-spore bearing bacillus, saccharomycete, actinomycete, photosynthetic bacterium, mycelial fungus and lactobacillus; and its preparation process includes primary seed culture, secondary proliferation culture and mixing the single solid fermented microbial preparations in certain proportion. The compound microbial fermentation preparation together with some supplementary material may be added into dewatered animal feces for solid fermentation to produce active microbial fermented product.

The invention discloses biomass liquefied oil and a preparation method thereof. By the method, sludge is pyrolyzed to obtain the biomass liquified oil. The sludge can be fresh primary-precipitate and secondary-precipitate mixed sludge. The water content of the sludge is 0-99.5% (by mass percent), and the proportion of the organic substance quantity accounts for 62.9-80% of the solid mass in the sludge, preferably 66.7-80%. The inside of a reaction kettle is provided with a protective atmosphere, and the protective atmosphere is a reductive atmosphere or an inert atmosphere obtained after carrier gas is introduced into the reaction kettle. Carbonate serving as a catalyst can be added into the pyrolysis reaction. The biomass liquefied oil obtained by utilizing the method has the characteristics of high yield, high heat value, high hydrogen content, low oxygen content and the like.

The invention discloses a method for improving acid soil, and mainly aims to overcome the problems that the fertility of conventional acid soil is degraded and the acid soil is relatively high in acidity. The method for improving the acid soil comprise the following implementation modes: preparing biomass charcoal and mushroom residues of fine particle sizes from agriculture and forestry wastes; sufficiently and uniformly mixing the prepared biomass charcoal and mushroom residues with acid soil so as to obtain a soil mixture; performing biochemical culture on the soil mixture. According to the method for improving the acid soil, a soil improvement substance is prepared from the agriculture and forestry wastes, and with the combination of an edible mushroom production residue product, the properties of the acid soil can be improved; the soil improvement substance is simple in preparation process, simple to use, low in cost and remarkable in effect, has advantages of environmental-friendliness, low carbon, resource recycling and the like, provides a novel way for acid soil improvement, and has good social and economic benefits and popularization application values.

The invention discloses a wide-range nonsynchronous uplink accessing method and a device for ground-air communication. The method includes that data on physical random access channels (PRACHs) on a plurality of data symbols which are adjacent in time of uplink PRACHs of a long time evolution (LTE) system are reserved; a method for reserving the data on corresponding bandwidth is that reserved resource blocks (RBs) are freed up when a base station distributes uplink resources, and the freed-up RBs are not distributed to any uplink users to use; and the base station receives the data in a certain step length sliding window mode to detect a plurality of parallel uplink PRACHs and then outputs detection results of the plurality of parallel PRACHs in a combined mode. By means of the method, under the condition that any modification is not made on an LTE terminal, large-range covering of users in a range of over 100km is achieved only by configuring uplink channel resource allocation parameters of the base station and uplink PRACH receiving algorithm of the base station.

The invention discloses a leak point detection method for an underground diaphragm wall in a soft soil area. The defects that construction is complex, measurement is difficult, and the accuracy degree of the measurement result is low are overcome, and meanwhile the specific positions of leak points are measured accurately. The hidden leak points of the underground diaphragm wall in the soft soil area can be accurately detected, and the method is simple and practicable, convenient to operate and short in construction period. In addition, by means of the method, the reinforcement effect can be achieved on soft soil, the water content of the soft soil can be remarkably reduced within a short time, the undrained shear strength of the soft soil is improved, the sensitivity of the soft soil is reduced, and the reinforcement effect of the soft soil is irreversible. A detection device for achieving the detection method comprises an observation well, a precipitation well, aluminum electrodes and a powering-on device. The observation well is located on the outer side of a foundation pit and used for observing changes of the underground water level on the outer side of the foundation pit. The precipitation well is located on the inner side of the foundation pit and used for observing the underground water level on the inner side of the foundation pit. The aluminum electrodes are electrodes needed for an electroosmosis method. The powering-on device is located on the ground and provides a positive power source and a negative power source for the aluminum electrodes.

The invention relates to a method and a device for detecting vehicle flow information, wherein the method comprises leading vehicles which are travelling to intercommunicate a digital coding for reflecting vehicle travelling information of the travelling condition through a wireless digital communication mode, and leading vehicle flow information which is integrated by the travelling information of the vehicle to be generated in all the vehicle-carrying devices of vehicles which intercommunicate signals. The method smartly utilizes vehicles which are travelling to be the collecting and the delivering vehicle of vehicle flow information, and the aggregation of the travelling condition information of all the vehicles on any position of a certain road section which is needed can be obtained through detecting one vehicle, and the method completely breaks through the limitation of time, space and sampling objects of the original vehicle flow detection method. An intelligent road traffic light system which utilizes the device for detecting vehicle flow information can greatly improve the capability of accurately predicting road traffic conditions, and maximally play the capacity of road facilities through the optimum timing control of traffic lights.

The invention discloses an integral lifting method for an ultra-long light thin giant steel tube truss. The method sequentially includes the following steps: a) setting control lines on a floor in a manner of respectively shifting to two sides along an axis C by 15cm, setting six Y-direction control lines along the direction perpendicular to the axis C, and forming an assembly control axis network; b) mounting a temporary scaffold, welding the scaffold together with steel plates embedded on concrete beams, and fixing firmly; c) arranging supporting guide frameworks, and enabling feet to be in rigid connection with concrete roots; d) assembling and aligning all lower chords on the scaffold, and increasing restraining plates, used for positioning connectors, for the chord connectors sectionally and sequentially after integral adjustment; e) lifting, selecting an upper-chord horizontal main tube of the truss as a lifting top anchor, lifting tooling beams through a transfer structure, and fixing a hydraulic jack; f) unloading; g) measuring deflection, setting stress and strain measuring points, and performing stress and strain monitoring on bars at typical positions of the truss.

The invention provides a method for removing underway seeper of a superficial layer of a filtration and infiltration well. The method comprises the following steps that: sump wells (4) are arranged under two side drains (3) of a cross road between a road mainline (1) and a crossed road (2) respectively; an infiltration well (6) is arranged above the side underground water level of the sump well (4); the pool bottom of the infiltration well (6) is provided with vermiculite grating (7) with excellent functions of filtration and infiltration; the sump well (4) and the infiltration well (6) are connected by a drainpipe (5); and pollutants are removed by the vermiculite grating (7), and purified water is drained. The method has reasonable design and simple arrangement, can infiltrate surface runoff to underground permeable ground of the superficial layer, can quickly remove the pollutants, has the characteristics of easy popularization in road construction, good effect, fast effect, environmental protection and economy, and can obtain good social, economic and environmental benefit.

The invention discloses a method for improving acid soil in a dry land, and mainly aims to overcome the problems that the fertility of conventional acid soil is degraded and the acid soil is relatively high in acidity. The method for improving the acid soil in the dry land comprise the following implementation modes: preparing biomass charcoal and mushroom residues of fine particle sizes from agriculture and forestry wastes; uniformly mixing and stirring the prepared biomass charcoal and mushroom residues with urea, a calcium magnesium phosphate fertilizer and potassium chloride so as to obtain a charcoal-based mixture; sufficiently mixing the charcoal-based mixture with the acid soil in the dry land so as to obtain a soil mixture; performing biochemical culture on the soil mixture. According to the method for improving the acid soil, the charcoal-based mixture for improving the properties of the acid soil is prepared from the biomass charcoal and mushroom residues prepared from the agriculture and forestry wastes, and conventional inorganic fertilizers; the charcoal-based mixture is simple in preparation process, simple to use, low in production cost and remarkable in effect.

The invention relates to a baking varnish composition, main components of which by weight percentage are: saturated polyester resin: 64-70, isobutyl ether melamine formaldehyde resin: 20-28, epoxy resin: 0-10, flatting agent: 0-0.01, solvent: 6-7.6 and silane coupling agent: 0-1. The formulation is that cross linking reaction happens on the condition that the saturated polyester resin is matched with the isobutyl ether melamine formaldehyde resin with a small amount of epoxy resin and a little silane coupling agent added to form film with excellent adhesion and materialization. The baking varnish composition can be directly coated on the surface of nylon and glass fiber free from pretreatment, has very strong corrosion resistance and is environmental-protection and nonhazardous. The paint layer generated after coated on the surface of nylon and glass fiber has strong adhesion.

A method for preparing high-purity ammonium polyvanadate belongs to the technical field of hydrometallurgy and vanadium chemical industry. The method comprises the following steps: feeding ammonia gas into the vanadium-containing purified leaching solution, adjusting the pH value to 4.0-7.0, stirring, Sodium ammonium vanadate is obtained after filtration; the sodium ammonium vanadate is heated and dissolved after adding water, ammonium salt is added and the pH value is adjusted to 2.0-3.0 to obtain high-purity ammonium polyvanadate. The method has the advantages of simple process, low cost, and easy operation. The content of the prepared high-purity ammonium polyvanadate is greater than 90%, and the vanadium yield is greater than 90%. It has good social and economic benefits and is convenient for industrial promotion.

The invention relates to a PC/PMMA/PETG ternary alloy material, which is prepared from the following raw materials by mass: 40-60% of polycarbonate, 10-30% of polymethyl methacrylate, 20-40% of polyethylene terephthalate-1,4-cyclohexanedimethanol ester, 1-10% of a compatibilizer, 1-10% of a toughening agent, 1-10% of a reinforcing agent, 0.1-1% of a polyhydroxyl chemical coupling agent, 0.1-2% ofa chain extender, and 0.1-0.5% of an antioxidant. According to the present invention, the PC/PMMA/PETG ternary alloy material has advantages of excellent comprehensive performance, organic solvent resistance, strong-acid corrosion resistance and strong-alkali corrosion resistance. The invention further relates to a preparation method of the PC/PMMA/PETG ternary alloy material.

The invention provides a production process of high-elasticity-feature terylene pre-oriented fibers. The production process is characterized by comprising the steps of 1) slicing a raw material, namely, modified polyester, conveying the material to a wet material bin to enable pre-crystallizing, and then ventilating and drying to obtain dry slices; 2) feeding the dry slices and an additive into a screw extrusion machine together under a melting condition, filtering and then transferring into a spinning box to obtain a melt; 3) metering the melt through a metering pump, and feeding into a spinning assembly to yield silks; 4) performing slow cooling and side blowing for the silks obtained in step 3) to cool and shape, and then applying oil; 5) pulling, stretching, and thermally shaping; 6) coiling through a coiling head to obtain the high-elasticity-feature terylene pre-oriented fibers. The high-elasticity-feature terylene pre-oriented fibers prepared by the production process have the advantages that the specification is up to 180dtex/ 36f, the breaking strength is not less than 1.80cN/ dtex, the elongation at break is 200+/30; the softness, sense of touch and rebound elasticity are superior to those of the general fibers, and moreover, the water absorbing performance, the oil absorbing performance and the cleaning function are high.

The invention discloses a PA-PP alloy material and a preparation method thereof. The PA-PP alloy material is prepared from the following raw materials by mass percent: 30 to 80 percent of renewable PA6 resin, 10 to 40 percent of PP resin, 0 to 40 percent of glass fibers, 0 to 10 percent of compatilizer, 0.1 to 1 percent of lubricating agent, 0.2 to 0.5 percent of nucleating agent, and 0.2 to 1 percent of antioxidant. The PA-PP alloy has the beneficial effects: the high-performance low-cost PA-PP alloy prepared by the invention adopts the renewable PA6 and PP as basic materials to be mixed with the glass fibers, compatilizer and little other auxiliary additives, so that the performance is excellent and the cost is low; and the PA-PP alloy has promising application prospect and obvious social and economic benefits in the field such as building materials, cars, electrons and electric appliances, articles for daily use and the like.

The invention relates to the technical field of soil remediation, and particularly relates to a method for remediating cadmium pollution of soil with red-spotted stonecrop. The method comprises the following steps: step A: applying a biomass charcoal improver to the polluted soil; step B: planting red-spotted stonecrop in the polluted soil; step C: after growing for 60-150 days, cutting overground plant parts of the red-spotted stonecrop and then applying a nutrient solution; and step D: after repeating the step C for 1-4 times, removing the whole red-spotted stonecrop. The method provided by the invention uses the red-spotted stonecrop and the biomass charcoal improver for joint remediation; the biomass charcoal improver provides a relatively good growth environment for the red-spotted stonecrop, plays a role of promoting growth of roots of the red-spotted stonecrop, and enhances vitality of the red-spotted stonecrop; the red-spotted stonecrop can enrich the heavy metal cadmium efficiently; the content of cadmium in the polluted soil can be reduced greatly under double action of the red-spotted stonecrop and the biomass charcoal improver; the method can achieve the purpose of complete remediation after three to six years and has good social and economic benefits and popularization and application values.

The invention discloses a consolidation method of soft earth foundation. The method is used for consolidation treatment of hydraulically filled land area formed by large-area land reclamation by encircling the sea. The consolidation method of soft earth foundation is characterized by enhancing compressive pre-stress of soft sludge to be treated in folds by reducing ground water level, lifting water at low investment. Compared with existing methods, the consolidation method can help shorten 2/3 of conventional construction period, reduce the cost to 1/5-1/6 of conventional cost, thus the method has obvious social benefit and economic benefit.

The invention relates to a durable fabric self-cleaning finishing agent. The finishing agent comprises the following raw materials: epoxy resin, nano-titanium dioxide, sodium phosphate dibasic dodecahydrate, polystyrene sulfonate, foamy copper, cellulose ester, butylbenzyl phthalate, barium stearate, luffa cylindrical juice, nano-mica powder, a defoamer, nano-chitin, coco-betaine, an emulsifying wetter, sodium alginate and glycerin abietate. The invention has the advantages that the durable fabric self-cleaning finishing agent is provided; and a fiber fabric is finished by utilizing a fabric self-cleaning finishing agent with special composition, so that the need of developing high-grade self-cleaning textiles can be met.

The invention relates to a giant electric furnace for zinc pyrometallurgy, in particular to an electric furnace using columned straight graphite electrodes with diameter range 200mm to 800mm, belonging to the electric furnace equipment field. The giant electric furnace for zinc pyrometallurgy is characterized in that: the hearth of the furnace body of the electric furnace is a quadrate sealed chamber, the upper side of which is side by side provided with at least two graphite electrode access sockets, each graphite electrode access socket is provided with a graphite electrode, and a feeding tube is connected with the upper side of the hearth of the furnace body of the electric furnace. The graphite electrodes are clipped by two arc connecting clamps connected with a connecting lead, and each graphite electrode can move from top to bottom along with the arc connecting clamps. The periphery of each arc connecting clamp is provided with a cooling jacket. The graphite electrodes have straight columned shapes, the diameters of which are 200mm to 800mm. The giant electric furnace for zinc pyrometallurgy using columned graphite electrodes with large diameters has the advantages of simple structure, safe and convenient use, operation and maintenance. The giant electric furnace for zinc pyrometallurgy effectively improves the output of the zinc pyrometallurgy for a single electric furnace, allowing the annual production capacity of the single electric furnace above ten thousand tons, thus the giant electric furnace for zinc pyrometallurgy establishes the foundation for the development of the large scale electric furnace industrialization, and also has excellent socioeconomic performance and application prospects in the market.

The invention relates to a method for comprehensively discharging accumulated water of underpass roads by a deep layer of a filtering settling pond. A water collecting well (4) is arranged below side ditches (3) on both sides of an intersecting road of a road main line (1) and an intersected road (2); the side of the well is provided with an settling pond (6); and the water collecting well (4) and the settling pond (6) are connected by a drainage pipe (5). The inside of the settling pond is provided with an infiltration well (12) penetrating a pond bottom (7). An inlet of the infiltration well (12) is covered by a filter net (10); the wall of the infiltration well is distributed with holes; the filter net (10) is covered by a filter layer (9); and the lower body of the infiltration well is wound by a filter layer (9). The periphery of the lower end of the infiltration well (12) is filled with a layer of gravels (11), and the periphery of the end head is sequentially provided with an impermeable layer (14) and a permeable soil layer (15) downwards. Due to simple arrangement and reasonable design, the method ensures that rainwater on the road surface can infiltrate into a deep underground permeable soil layer after decontamination treatment under the condition of higher groundwater level, drains sewage and supplements groundwater quickly, and has quick effect, economy and environmental protection.

The present invention discloses a beet armyworm sex pheromone composition and a beet armyworm sex pheromone lure, wherein the beet armyworm sex pheromone composition comprises three components such as cis-9,trans-12-tetradecadienyl acetate, cis-9-tetradecenylalcohol and tetradecenal according to a mass ratio of 80:10:10-200, and the beet armyworm sex pheromone lure comprises the beet armyworm sex pheromone composition and a releaser for holding and slowly releasing the beet armyworm sex pheromone composition. According to the present invention, the beet armyworm sex pheromone composition and the beet armyworm sex pheromone lure have strong specificity for male beet armyworm, and do not trap and kill female beet armyworm and other insects; and with the beet armyworm sex pheromone composition and the beet armyworm sex pheromone lure, the high-incidence season of the pest generation can be effectively monitored, the blind pesticide spraying can be avoided, the good prevention control effect is provided, and the natural enemies of pests can be effectively protected and used.

The invention relates to a pressurized dissolved gas enhanced ozone pre-oxidation capability device and a processing method thereof. The pressurized dissolved gas enhanced ozone pre-oxidation capability device comprises an ozone preparation system, a pressurization system, a pressure dissolved gas system and a release system; the ozone preparation system comprises an ozone generator, a gas storagetank and a regulating valve; the pressurization system comprises a pressurization pump and a check valve; the pressure dissolved gas system comprises a pressure tank and a plurality of aeration heads, the plurality of aeration heads are arranged at the lower part in the pressure tank, and a water inlet pipe and a water inlet valve are arranged at the bottom; the release system comprises a water outlet pipe, a water outlet valve, a dissolved gas release head and a release tank; the ozone generator is communicated with the gas storage tank through a first gas conveying pipe, the gas storage tank is communicated with the pressurization pump through a second gas conveying pipe, and the regulating valve is arranged on a second gas conveying pipe; one end of the pressurization pump is communicated with the gas storage tank through the second gas conveying pipe, and the other end of the pressurization pump is communicated with the aeration heads in the pressure tank through a third gas conveying pipe. Through the pressurized dissolved gas enhanced ozone pre-oxidation capability device and the processing method thereof provided by the invention, the pretreatment requirements of industrialsewage can be met, the biochemical properties of the sewage is improved, and no secondary pollutant is generated.

The invention relates to a method for controlling a potato late blight through potato late sowing, which belongs to the technical field of plant protection. The method comprises a technical proposal that the conventional potato fertilization and field management method is kept unchanged; the difference is to sow potato late; potato is sowed from the second ten days of July to the first ten days of August and is harvested from the last ten days of October to the first ten days of November; potato is planted in quincuncial ponds on ridges with the ridge width of 50 to 60cm and the ridge spacing of 60 to 70cm; the quincuncial ponds are formed on the ridges, and the diagonal length of each pond is 60 to 70cm; the planting density is 2,200 to 3,300 stocks for each mu; the breeds of potato can be Hui-2, Mila, Hezuo 88 and Weiyu No.3; and the method is suitable for tobacco and vegetable fields. The method can reduce the dosage of chemical pesticides and the adverse effect of the chemical pesticides on the ecological environmental pollution of farmland, provides a new method for the ecological control of the potato late blight, and has good social and ecological benefits.

The invention discloses an air cooling freezer. The air cooling freezer comprises a freezer body (1) which is provided with a refrigerating region (12) and a storage region (11). The air cooling freezer further comprises an air supply system. The air supply system comprises a draught fan (3), an air outlet pipeline (4) provided with an air outlet (41) and an air return pipeline (5) provided with an air return opening. The air outlet pipeline (4) is arranged on the inner side wall of the storage region (11). The air return opening of the air return pipeline (5) is formed in the inner side wall of the storage region (11). The draught fan (3) is arranged on the refrigerating region (12), the air return pipeline (5) penetrates the freezer body (1) to communicate with an exhaust inlet of the draught fan (3), and the air outlet pipeline (4) penetrates the freezer body (1) to communicate with an air blowing opening of the draught fan (3). Compared with the prior art, the air cooling freezer has the beneficial effects that a refrigerating circulation pipeline cannot be blocked, refrigeration is rapid and uniform, frosting does not occur, the process is simple and production is easy and has good social and economic benefits.

The invention discloses a core filter net of an air purifier in a high mercury workshop and a preparation method thereof, and belongs to design of a core filter net of an air purifier in a high mercury workshop. The preparation method is characterized in that a nanometer selenium-loaded sponge layer is used as one of core filter nets of the air purifier; the core filter net is sequentially formed by overlapping a HEPA (high efficiency particulate air) net, the nanometer selenium-loaded sponge layer and an HEPA net. The preparation method has the advantages that the nanometer selenium-loaded sponge layer is innovatively designed, and is used as one of core filter nets in the air purifier; by utilizing the sponge filter net, the gaseous mercury in air in the workshop can be actively and efficiently removed; when the initial concentration of Hg (mercury) is 20000 to 30000ng/m<3>, the high-efficiency removal rate of Hg is about 97% to 99%, and the huge social benefit and economic benefit are realized.

The invention discloses a production method for preparing hydrolyzed wheat proteins by a fermentation method, and belongs to the technical field of feed additive production. According to the method, wheat gluten protein powder serves as a raw material and is hydrolyzed into a short peptide chain under the action of protein enzyme preparations such as endo protease and carboxy-peptidase generated by mixed fermentation of bacillus subtilis and aspergillus oryzae, and hydrophobic amino acid at the tail end of the short peptide chain is cut off, so that proteolysis and debittering of the hydrolyzed wheat proteins can be realized at one step by the fermentation method. Compared with a traditional proteolysis method, the production method has the advantages that production cost is low, reaction conditions are moderate, technical parameters are reliable, product quality is stable, bitter taste is avoided, indicators such as product flavor and colors are superior to enzymatic hydrolysis, the hydrolyzed wheat proteins are small in molecular weight, fine in solubility and high in glutamine content, plasma proteins can be replaced, the digestibility of weaning young animals is obviously improved after applications are added, and stress and diarrhea are obviously avoided.

Disclosed is a method for purification and recovery of methane with purity of 80-90 %, yield of 80-95% from refuse landfill gas, comprising compression, desulfurization, refrigerating liquid separation, temperature swing adsorption (TSA) and pressure swing adsorption (PSA). The desulfurization procedure adopts special type active carbon and iron oxide compounding desulfurizer, the total sulfur after desulfurization is less than or equal to 20mg/m3; the refrigerating liquid separation system temperature is 4-10íµ, most of water and high boiling point substances are removed; the adsorbent in TSA adopts alumina and silica gel or alumina and active carbon in a volume ratio of 1:2-10, wherein the alumina is filled in the entry end of the adsorbent bed, the silica gel or active carbon is filled in the exit end of the adsorbent bed, the adsorbent in TSA will also adopt alumina, silica gel and active carbon in a volume ratio of 1:2-10:2-10. Evacuation desorption technology is used in PSA, the adsorbent uses alumina and silica gel with a volume ratio of 1:3-10, an adsorbent pressure of 0.2-2.5 MPa(G), an evacuation pressure of -0.05- -0.09 MPa(G). The product methane is obtained in the adsorption step, and the method is suitable for purification and recovery of methane with higher purity from refuse landfill gas.

The present invention provides an NB-IoT transmission mode-based antenna attitude measurement system and method. The system comprises a terminal data acquisition unit, a data processing unit and a display application unit which are connected with one another sequentially; the terminal data acquisition unit comprises a data acquisition module as well as a wired data link transmission module and a wireless data link transmission module which are connected with the data acquisition module; the data processing unit comprises an early warning data processing module and a database module; and the display application unit comprises a monitoring platform and an instruction sending module. According to the NB-IoT transmission mode-based antenna attitude measurement system and method of the invention, an antenna calibration and positioning magnetic field detection system, a data collection real-time reporting system and other systems are built, so that antenna attitude working parameters are monitored in real time, manual control can be performed at any time according to actual situations, antenna attitude deviation caused by misoperation or natural disasters can be decreased to the greatest extent or can be avoided, and losses can be avoided.

The invention discloses a Geo-SAR satellite front-side view imaging attitude angle calculation method based on a single reflector antenna. The method comprises the steps: determining a mechanism for generating SAR satellite squint angle formation and deviation through satellite-ground geometric relation modeling, carrying out simulation analysis on the squint angle characteristics of a geosynchronous orbit SAR under typical orbit parameters, and based on an SAR satellite zero Doppler surface vector analysis algorithm, calculating a pitch angle and a rolling angle which need to be adjusted in atwo-dimensional pitch rolling guidance method, and a squint angle value after guidance. According to the pitching and rolling two-dimensional attitude guidance algorithm provided by the invention, the pitching angle and the rolling angle required to be adjusted by the satellite can be accurately calculated, the attitude angle required to be adjusted is reduced by at least one order of magnitude compared with a two-dimensional yaw guidance method, and the maneuvering speed of the satellite is improved by at least one order of magnitude.

The invention provides a power supply circuit and a control method thereof. In the power supply circuit, two output capacitors connected in series are arranged between a positive electrode and a negative electrode of the direct current side of a bridge type rectification unit, and a controllable semiconductor switch circuit is arranged between one of a zero line and a live line of the alternating current side of the bridge type rectification unit and a connection point of the two output capacitors; an input voltage mean value sampling comparison circuit and an input voltage change rate comparison circuit output a mean value comparison result and a change rate comparison result respectively; a control unit controls the on-off state of the controllable semiconductor switch circuit according to a mean value comparison result and a change rate comparison result, so that the power supply circuit is equivalently converted into a voltage doubling rectifying circuit when the mean value and the change rate of the input voltage of the power supply circuit are lower than corresponding threshold values, and when the average value or the change rate of the input voltage is higher than a corresponding threshold value, the bridge rectifier circuit is equivalently converted into a bridge rectifier circuit; therefore, automatic switching of the rectification mode of the power supply circuit is realized, and the phenomenon of failure and explosion caused by overvoltage due to forgetting or mistakenly shifting a switch by a user is avoided.