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59 results about "Effective precipitation" patented technology
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Method for forecasting water burst flood peak and peak time for karst tunnel underground river
ActiveCN102930357ASimple structureEasy to calculateClimate change adaptationForecastingPeak valueMechanical equipment
The invention discloses a method for forecasting water burst flood peak and peak time for a karst tunnel underground river. The method comprises the following steps: (1) computing point rainfall; (2) determining areal rainfall according to the point rainfall; (3) computing effective precipitation according to the areal rainfall; (4) computing time interval unit hydrograph; (5) computing effective precipitation unit hydrograph according to the time interval unit hydrograph; (6) computing surface runoff according to the effective precipitation and the effective precipitation unit hydrograph; (7) computing subsurface runoff; (8) adding the surface runoff at each time interval and the subsurface runoff at the corresponding time intervals to obtain flood discharge; (9) performing fitting on value of the flood discharge to obtain a flood hygrograph; and (10) obtaining the flood peak and the corresponding peak time on the flood hygrograph and determining construction time for a karst tunnel according to the flood peak and the corresponding peak time. According to the method provided by the invention, the water burst flood peak in the tunnel and the arrival time of the flood peak can be accurately forecasted, so that the construction time for the tunnel can be reasonably arranged, and the lives of people and the safety of mechanical equipment can be ensured.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
High-performance high-entropy alloy and processing method thereof
The invention discloses a high-performance high-entropy alloy and a processing method thereof. Certain content of an element carbon is added into a Fe40Mn40Co10Cr10 alloy to form an interstitial solid solution with a basal body, so that stacking fault energy of the material can be effectively reduced, twin crystals can be induced under the room-temperature condition, and extra strength increment is provided for the basal body by performing solid solution and separating carbides through the element carbon. The element carbon is used as a good interstitial atom and the carbide is used as an effective precipitation strength phase; heat preservation is performed for a relatively long time at a relatively high temperature in the last step, an as-forged microstructure is partly or completely eliminated, and part of the precipitated phase is dissolved to form a nearly single phase structure, so that the alloy has relatively great performance controllable space again on the basis of higher performance level, further strengthening is favorably performed through other strengthening ways such as deformation strengthening and precipitation strengthening to obtain more reasonable strength and plasticity match; and moreover, content of overall alloy elements is reasonable, cost is low, and economical efficiency is relatively strong.
Owner:深圳市卡德姆科技有限公司
Farmland irrigation water amount calculation method and device
InactiveCN106780093AAchieve precise utilizationAvoid wastingData processing applicationsWater volumeWater resources
The invention provides a farmland irrigation water amount calculation method and device. The method includes the steps that whether the water content of soil is lower than a preset water content or not is judged; if the water content of soil is lower than the preset water content, the required water amount of a target irrigation area is obtained; the effective precipitation amount of the target irrigation area is obtained; according to the required water amount of the target irrigation area and the effective precipitation amount of the target irrigation area in a time period, the irrigation amount of the target irrigation area is calculated. By means of the method and device, the problem that in the prior art, irrigation water consumption accuracy is low is solved, water requirement conditions of crops in the target irrigation area are quantitatively and periodically reflected, precise utilization of irrigation water is achieved, and unnecessary waste of water resources is avoided.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
Method and apparatus for reducing the precipitation rate of an irrigation sprinkler
InactiveUS6921029B2Uniform water distributionImprove uniformityWatering devicesMovable spraying apparatusStreamflowPiston
A method and apparatus for reducing the effective precipitation rate of an irrigation sprinkler during an irrigation cycle without disrupting the supply of pressurized water from the source opening and closing the inlet to the sprinkler riser at timed intervals through the use of a flow stop valve assembly disposed at the base of the riser, and which includes a lost motion piston and cylinder assembly and first and second flow control devices which control the time the flow stop valve is in the open and closed conditions during the irrigation cycle.
Owner:RAIN BIRD CORP
Method for analyzing farmland irrigation hierarchical water requirement amount
ActiveCN107491844ASolve the problem of inaccurate calculation of irrigation water demand and large deviationSolve the problem of large calculation inaccuracy and deviationGeneral water supply conservationForecastingWater-use efficiencyWater resources
The invention provides a method for analyzing a farmland irrigation hierarchical water requirement amount. The method comprises the following steps of analyzing a farmland irrigation rigid water requirement amount according to a theoretical water requirement amount and an effective precipitation amount in a crop growth period; analyzing a farmland irrigation elastic water requirement amount according to an advanced farmland irrigation water effective utilization coefficient which is locally recommended; and analyzing a farmland irrigation extravagant water requirement amount according to an irrigation water actual utilization coefficient which is lower than the advanced farmland irrigation water effective utilization coefficient that is locally recommended. The method for analyzing the farmland irrigation hierarchical water requirement amount has advantages of settling problems of low accuracy and large error in calculating the farmland irrigation water requirement amount, performing hierarchical analysis and calculation on the farmland irrigation water requirement, accurately analyzing the water requirement amount in each hierarchy in farmland irrigation, improving water utilization efficiency in farmland irrigation, saving water resource, realizing effective controlling for controlling water for farmland irrigation, and supplying reliable basis for management guidance and planning scheduling of irrigation water.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Method for separating precipitation echoes and sea surface backscattering in echo signals of scatterometer
ActiveCN103675788AEliminate couplingImprove the echo signal-to-noise ratioRadio wave reradiation/reflectionTime domainCoupling
The invention provides a method for separating precipitation echoes and sea surface backscattering in the echo signals of a scatterometer. Pulse compression is carried out on the received echo signals to output compressed pulse signals, minor lobe restraining is carried out on the compressed pulse signals through a frequency domain windowing algorithm, the coupling of distance minor lobes existing in precipitation echo signals and sea surface echo signals is eliminated, the time domain aliasing of precipitation and the sea surface is effectively separated, Doppler frequency correction and energy decrement compensation are carried out in a frequency domain, effective precipitation and sea surface backscattering coefficients can be extracted and synchronously inverted from complex air-sea boundary mixed echo signals, the mutual influence can be eliminated or compensated, and the precipitation echoes and sea surface backscattering can be effectively separated.
Owner:NAT SPACE SCI CENT CAS
Method for Chinese pine seedling cultivation and afforestation in dry and stony sunny slope
InactiveCN104823804AReduced lump ratePromote growthClimate change adaptationAfforestationSeedlingObserved Survival
The invention mainly relates to a method for Chinese pine seedling cultivation and afforestation in a dry stony sunny slope, and belongs to the technical field of forest seedling cultivation and afforestation. In the northern area of China, there is much dry and stony mountain land where the survival rate of afforestation is low and the forest establishment effect is poor. The cultivation and afforestation method comprises the steps that firstly, seedlings are cultivated in a bare-rooted manner in a field land; secondly, the seedlings are transplanted into containers to be cultivated, substrates in the containers are formed by clay and compounds of the clay or the clay and the compounds of agriculture and forestry organic wastes, and the clay in the substrates accounts for 70-80 percent in volume; thirdly, when the container seedlings are used for afforestation, a mode that the container seedlings are not detached from the containers is adopted for afforestation, the bottoms of the containers are removed, and wall cutting treatment is performed on the peripheries of the containers; fourthly, the container seedlings are transplanted into pits, after afforestation is performed, the seedlings can survival for a non-effective precipitation period of a half month to one month, and after the seedlings survival in summer under natural conditions, common intertillage cultivation is performed. According to the method, the survival rate and preserving rate of the Chinese pine seedlings are improved, the growing speed is obviously improved, and the forest establishment effect is better.
Owner:HEBEI ACAD OF FORESTRY SCI
Catalyst used for coal hydrogenation catalytic gasification, and preparation method and use thereof
InactiveCN106311339AImprove bindingEasy to changeOrganic-compounds/hydrides/coordination-complexes catalystsGaseous fuelsGas phasePotassium
The invention belongs to the technical field of coal hydrogenation catalytic gasification catalysts, and provides a high-efficiency catalyst used for coal hydrogenation catalytic gasification, and a preparation method thereof. The above ternary composite catalyst is obtained through depositing a ternary active component of the catalyst on a coal-based material by adopting a simple and effective precipitation technology, and surface function groups on the coal-based material have strong interaction with the catalyst components. Compared with a unitary component and a binary component, the ternary component applied in the reaction for preparing natural gas through coal hydrogenation catalytic gasification has a low melting point, easily becomes a liquid rapidly penetrating apertures in the coal-based material in order to improve the gasification efficiency of the coal, can be easily combined with the coal in the presence of organic potassium or sodium salt, and generates a large amount of apertures in the high temperature reaction process. A result of active test shows that the prepared Fe-Ca-Na catalyst allows the rate of conversion of the coal into a gaseous product to reach 75.2% and the methane generation amount to be 3.7 mmol.g<-1> when the reaction time is 300 min.
Owner:CHINA PETROLEUM & CHEM CORP +1
Regional farmland irrigation water consumption analysis and calculation method
The invention discloses a regional farmland irrigation water consumption analysis and calculation method, which comprises the following steps of: 1, deducing regional total water consumption based on a water amount balance equation by taking precipitation, entry and exit water amount, cross-basin water transfer amount and water storage variables monitored by remote sensing as input; 2, selecting a remote sensing evapotranspiration product by taking the deduced total water consumption as a constraint, and obtaining the total water consumption driven by regional solar energy; 3, acquiring a farmland range based on land utilization space distribution, calculating water consumption of the farmland region by using a remote sensing evapotranspiration product, and deducting effective precipitation in the water consumption to obtain irrigation water consumption; 4, calculating the irrigation water consumption based on the proportional relation between the irrigation water consumption and the irrigation water consumption; and 5, when the regional multi-year irrigation water consumption is analyzed, collecting multi-year data, repeating the steps, and calculating the year-by-year farmland irrigation water consumption. The method has the advantages that the large-scale farmland irrigation water consumption can be quickly calculated, and the statistical survey data of the agricultural irrigation water can be rechecked.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Kiln transmutation autogenous glaze Shandong celadon, mud material and method
The invention provides a kiln transmutation autogenous glaze Shandong celadon, a mud material and a method. A ceramic kiln employs a redox alternating atmosphere system to roast the unpainted clay idol into autogenous glaze Shandong celadon. The autogenous glaze Shandong celadon has a green glaze layer, or both blue glaze layer and blue porcelain body. The method can ensure effective precipitation of glaze layer by ceramic unpainted clay idol and enrichment on the surface in one roast, so as to obtain a Shandong celadon finished product through kiln transmutation. The method helps improve productivity and yield of Shandong celadon, saves energy and protects the environment, in particular reduces carbon emissions, and is a great-leap-forward progress for ceramic production.
Owner:谢敬裕
Water-grass-livestock balancing system
The invention discloses a water-grass-livestock balancing system comprising a water-grass balancing sub-system and a grass-livestock sub-system. The water-grass balancing sub-system determines a plantation structure and area for irrigation of a fodder grass land each year according to effective precipitation and maximum irrigation water, so grass is determined by water; and the grass-livestock balancing sub-system determines livestock breeding numbers each year according to grass output of the native pasture and artificial fodder grass land, so livestock numbers are determined by grass. The water-grass-livestock balancing system is divided into a water-grass and grass-livestock balancing sub-systems, so a mode of grass defined by water, and livestock defined by grass is formed; complicated work is simplified; and balance calculation is conducted to the two sub-systems individually.
Owner:INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C
Actual water consumption processing method and device for crops and server
InactiveCN109977515AAccurate calculationData processing applicationsDesign optimisation/simulationWater storageComputer science
The invention discloses an actual water consumption processing method and device for crops and a server. The method comprises: establishing a first model used for calculating the water storage capacity of root layer soil, obtaining the water storage capacity of the root layer soil of an adjacent irrigation day according to the first model, and the adjacent irrigation day at least comprising the day or the day before; establishing a second model for calculating effective precipitation, and obtaining precipitation infiltration amount according to the second model; according to the preset irrigation water depth, the rainfall infiltration amount and the root layer soil water storage amount of the adjacent irrigation days, obtaining the actual water consumption of the crop on the same day. Thetechnical problem that the actual water consumption calculation mode of crops is poor in effect is solved. According to the method, accurate and automatic calculation of the actual water consumption of the crops is realized.
Owner:HAONONGYI E COMMERCE CO LTD
Prediction method of flood peak value and peak time of storm water inrush from underground river in karst tunnel
ActiveCN102930357BSimple structureEasy to calculateClimate change adaptationForecastingPredictive methodsKarst
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Sand-stabilizing, tree-planting, rain-collecting and moisture-holding desertification control plate
InactiveCN102720175AIsolated contactPrevent movementClimate change adaptationWatering devicesVegetationSoil science
The invention relates to a sand-stabilizing, tree-planting, rain-collecting and moisture-holding desertification control plate. The plate is characterized in that dentation notches are formed at the periphery of the desertification control plate at a certain interval; and pile insertion holes are formed on the surface of the plate. By the sand-stabilizing, tree-planting, rain-collecting and moisture-holding desertification control plate, desert wind can be prevented from contacting loose sandy soil, so that a sand body can be prevented from moving; sunshine is reflected, heat and light are isolated, moisture is prevented from being evaporated, the temperature stability and humidity stability of soil are kept, and the survival of plants is facilitated; and most of limited rain is converged and collected to the periphery of roots of the plants on the lower side of the plate to form a plate surface rain-collecting drip irrigation effect, so that effective rain can be effectively utilized to the maximum extent. The plate is easy to manufacture, low in material consumption and cost, convenient to construct, quickly implemented, low in construction cost and high in plant survival rate, materials are easy to collect, a desertification control effect is improved, and the desertification control investment is saved.
Owner:余绳鑫
Precipitation early warning method and application thereof in geological disaster
The invention discloses a precipitation early warning method and an application thereof in geological disaster. The precipitation early warning method includes: comparing PWV (precipitable water vapor) inverted by using foundation GPS (global position system) data with precipitation data, considering functions of accumulation of the PWV in a precipitation occurrence process, finding out a power function law of converting the PWV into effective precipitation occurrence, and introducing the power function law into precipitation early warning so as to use the power function law as a critical threshold of effective precipitation. The precipitation early warning method can achieve the precipitation early warning small in watershed and high in accuracy, and can be used in development of early warning work of the rainstorm type geological disaster of torrential flood, debris flow, landslides and the like.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Method for filtering super-refraction of meteorology
InactiveCN102608608AReduce false positive rateRadio wave reradiation/reflectionICT adaptationElevation angleRadar
The invention discloses a method for filtering super-refraction of meteorology, which includes: filtering pixel points, smaller than 35dBz, in images of 0.5 degree elevation angle reflectivity of Doppler meteorological radars so as to acquire first filtering image; filtering connected domains with area smaller than 50 units so as to acquire second filtering image; utilizing circular structure elements with radius equal to one to perform morphological opening operation and then filtering connected domains with area smaller than 50 units so as to acquire third filtering image; obtaining characteristics of inertia moment of each connected domain in the third filtering image through a gray level co-occurrence matrix; filtering connected domains with area smaller than 100 and inertia moment larger than 1.9 and connected domains with area larger than 100 and inertia moment larger than 1.5 so as to acquire fourth filtering image; filtering pixel points of radial velocity V E[-1,1] to acquirefifth filtering image; and utilizing circular structure elements with radius equal to one to perform morphological opening operation. By the method, super-refraction is filtered while effective precipitation cloud cluster is reserved, and the miss-recognition rate and the false rate to super-refraction are lower.
Owner:TIANJIN UNIV
High-water-cut oil well sand prevention and precipitation method
InactiveCN112696178ASand control is effectiveEffective against sand and precipitationFluid removalSoil scienceOil field
The invention discloses a high-water-cut oil well sand prevention and precipitation method, and belongs to the technical field of oil field oil extraction. According to the high-water-cut oil well sand prevention and precipitation method, a proper amount of sand prevention and precipitation particles are squeezed in firstly, then gravel filling sand prevention construction is conducted, the sand prevention and precipitation particles are solidified to form a blocking layer under the condition that an oil layer is not polluted, a large hole channel formed by injected water or edge and bottom water is blocked, and meanwhile gravel and a screen pipe form a high-flow-guide sand blocking belt. According to the method, a composite gravel filling mode is adopted, sand prevention and precipitation particles are combined with quartz sand used for mechanical sand prevention, the sand prevention and precipitation particles capable of being solidified are firstly filled to form an oil seepage and water blocking sand blocking barrier, and then multi-particle-size quartz sand is adopted for filling to form a high-permeability sand blocking barrier. According to the method, the advantages of two sand prevention technologies are integrated; and the double effects of effective precipitation and effective sand prevention are achieved, the purposes of sand prevention, precipitation and oil increase are achieved, and the production requirement of the high-water-cut period is met.
Owner:PETROCHINA CO LTD
Domestic sewage precipitation apparatus
InactiveCN105268217AEffective Sediment FiltrationEasy to recycleSedimentation settling tanksSludgeFiltration
The present invention discloses a domestic sewage precipitation apparatus, which comprises a precipitation tank body, wherein the precipitation tank body is provided with a coagulation zone, the downstream of the coagulation zone is provided with a precipitation zone, the coagulation zone is provided with a water inlet, the precipitation zone is provided with a water outlet, the bottom portion of the precipitation zone is provided with a plurality of sludge tanks, and the upper portion of the precipitation zone is provided with a flow blocking plate. According to the present invention, the structure design is simple, the investment cost is low, the domestic sewage can be subjected to effective precipitation filtration, the water resource recycling can be easily achieved, and advantages of safety, environmental protection, and wide promotion application are provided.
Owner:黄富明
Reclaimed water recycling device
InactiveCN108928956AEasy to cleanAvoid accumulationTreatment involving filtrationMultistage water/sewage treatmentStationary caseReclaimed water
The invention discloses a reclaimed water recycling device, which comprises a box body, wherein one side of the top end of the box body is provided with a water inlet and a medicine dispensing port, avertically arranged fixing plate is fixed to one side, close to the water inlet, on the inner wall of the bottom end of the box body, the bottom end of the box body is provided with a blow-off pipe on one side close to the water inlet, a fixed box is fixed to the outer wall on one side, close to the water inlet, of the top end of the box body, a first motor is fixed at a central position of the top end of the fixed box, an output shaft of the first motor is connected with a vertically arranged lead screw, and the bottom end of the lead screw passes through the fixed box and is rotatable connected onto the outer wall of the top end of the box body. The reclaimed water recycling device can perform effective precipitation on the precipitate in wastewater, clean the precipitate effectively soas to prevent the precipitate from accumulating in the box body and bringing trouble to the normal treatment of wastewater, further can effectively clean or replace a filter screen while carrying outwastewater treatment, does not need to stop the treatment of wastewater, and has the advantages of good filtering effect and high filtering efficiency.
Owner:QINGDAO UNIV OF SCI & TECH +1
Device for collecting and measuring effective precipitation by using fixed water table
InactiveCN109597147AEfficient extractionAvoid accessRainfall/precipitation gaugesElectric machineryEngineering
The invention discloses a device for collecting and measuring effective precipitation by using a fixed water table. The device for collecting and measuring the effective precipitation by using the fixed water table comprises a base; a box body is fixedly mounted on the top end of the base; a rain gauge is fixedly mounted on one side of the top end of the box body; the other side of the top end ofthe box body is fixedly embedded with an original soil measuring box; the bottom end of the original soil measuring box extends into the box body and is fixedly connected to the top end of a first partition plate; the first partition plate is L-shaped, and the two ends of the first partition plate are separately fixedly connected to the inner wall of the box body; a first measuring box is fixedlyconnected to the side wall of the original soil measuring box; and the first measuring box is concentric-square-shaped. In the device for collecting and measuring the effective precipitation by usingthe fixed water table, a first filter screen fitted with a stopper is arranged in the concentric-square-shaped first measuring box, which can effectively block the sediment from entering the first measuring box and affecting the accuracy of the measurement of the device; and a motor is used to drive a piston back and forth, therefore, the precipitation can be effectively extracted from the water tank; thus, even if the amount of precipitation is large, the precipitation can be discharged in time for measurement, and the device can perform measurement, which indirectly increases the work efficiency.
Owner:HOHAI UNIV
Turnover precipitation separation device
ActiveCN106512491AAvoid cloggingAvoid secondary pollutionSpecific water treatment objectivesWater/sewage treatment by flocculation/precipitationSludgeWater flow
The invention relates to a water treatment precipitation separation device and particularly relates to a turnover precipitation separation device. The problems of small effective precipitation area, easy blocking after long-time operation, difficulty in precipitate treatment and secondary pollution to water in the existing water treatment precipitation separation device are solved. The turnover precipitation separation device comprises one of oblique-plate, oblique-pipe and horizontal-pipe precipitation devices; a sludge precipitation tank is arranged at the lower part of the precipitation device; multiple layers of parallel and oblique sludge precipitation plates are arranged in the sludge precipitation tank; the precipitation device is connected with a turnover mechanical device for controlling the turnover of the precipitation device; and a turnover shaft of the turnover mechanical device is horizontally arranged and is vertical to the water flow direction of the precipitation device. The device provided by the invention has the following advantages: (1) a 'horizontal shallow pool' is realized; (2) desilting is facilitated, and the precipitation channel is protected from being blocked; (3) the precipitate in the sludge precipitation tank sinks to the bottom quickly, and secondary pollution of the water is prevented; (4) the structure is reasonable and convenient and quick to control; and (5) the water treatment efficiency is greatly improved.
Owner:太原市润民环保节能有限公司
High-strength aluminum alloy powder, application of high-strength aluminum alloy powder in 3D printing and 3D printing method of high-strength aluminum alloy powder
ActiveCN114277285AImprove the effect of solid solution strengtheningInhibits the formation of cracksAdditive manufacturing apparatusTransportation and packagingSolid solution strengtheningAluminium alloy
The invention discloses high-strength aluminum alloy powder, which is prepared from the following components in percentage by mass: 4.2 to 6.0 weight percent of Mn, 1.2 to 3.0 weight percent of Mg, 0.6 to 1.0 weight percent of Sc, 0.05 to 0.6 weight percent of Zr, 0.01 to 0.2 weight percent of Si, 0.01 to 0.2 weight percent of Fe and the balance of Al. By optimizing the content of the alloy elements such as Mn, Mg, Fe and Si, the remarkable solution strengthening effect is achieved; by adding Sc and Zr, local formation of equiaxed grains is promoted, crack formation and expansion are inhibited, and meanwhile, an effective precipitation strengthening effect is achieved by means of dispersion particles generated in the aging process.
Owner:苏州倍丰智能科技有限公司
Balanced water distribution and clarification tank
InactiveCN103785221AImprove processing efficiencyQuality improvementFiltration circuitsFlocculationSludge
The invention relates to a balanced water distribution and clarification tank which comprises a backflow tank and a clean water tank, as well as a precipitation tank, wherein a water inlet is formed in one side of the backflow tank; the other side of the backflow tank is communicated with the clean water tank through a water outlet; the precipitation tank is communicated with the clean water tank through a filtration unit; a sewage pump is arranged at the bottom of the backflow tank; the sewage pump is communicated with the precipitation tank. A water body is filtered after being subjected to adsorption precipitation by using the backflow tank so as to be fed to the clean water tank, and after sludge precipitated in the backflow tank is subjected to precipitation filtration in the precipitation tank, moisture in the sludge is fed to the clean water tank, so that the effective precipitation and filtering of externally water are achieved, the reaction requirements of subsequent flocculation are met, and the improvement of water treatment efficiency and quality is facilitated, and water source is saved.
Owner:泰兴市睿济科技有限公司
A method for determining the kinetic curve of carbide isothermal precipitation
ActiveCN106018117BImprove practicalityAvoid Uniformity DefectsPreparing sample for investigationMaterial strength using tensile/compressive forcesCarbideKinetic curve
The invention discloses a method for measuring an isothermal precipitation kinetics curve of carbide. The method comprises steps as follows: 1) compressed yield stress values of a to-be-tested part at set isothermal temperatures and at isothermal time are acquired through a thermal simulated test machine; 2) effective precipitation coefficients feff used for representing a relative quantity of a precipitated phase effectively strengthened in the precipitation process are acquired according to the strength increment delta sigmate y and the largest strength increment delta sigmate y, max of the compressed yield stress values relative to the smallest compressed yield stress value, and feff is equal to the quotient obtained by dividing delta sigmate y, max by delta sigmate y; 3) the precipitation kinetics curve of the carbide in the isothermal process is drawn according to corresponding relations of the effective precipitation coefficients, the isothermal temperatures and the isothermal time under various isothermal conditions. A measurement parameter adopted in the method is the compressed yield stress, the strengthening function of isothermal precipitation is directly reflected, the practicability is high, the method can be directly used for process improvement, data are more visual, sensitive and accurate, and operation is simpler, more convenient and more effective.
Owner:SOUTH CHINA UNIV OF TECH
Horizontal flow precipitation water collecting device
PendingCN110681189ARaise the ratioIncrease load factorSettling tanks feed/dischargeSedimentation settling tanksWater productionEnvironmental engineering
The invention relates to a horizontal flow precipitation water collecting device, which comprises a device body and a water outlet ditch, wherein the device body is a cuboid structure, the water outlet ditch is arranged on the outer wall of the device body, a rectifying wall and a water collecting assembly are arranged in the device body, the water collecting assembly comprises a perforated watercollecting pipe, a water outlet pipe and a water outlet control gate, the perforated water collecting pipe is connected to one end of the water outlet pipe, the other end of the water outlet pipe extends into the water outlet ditch, the water outlet control gate is connected to the end, extending into the water outlet ditch, of the water outlet pipe through a pipeline, and a gap is formed in the connecting position of the pipeline and the water outlet pipe. Compared with the form of the water collecting groove, the device of the invention substantially reduces the water collecting area, so that the proportion of the effective precipitation area of the precipitation pond is large, and the load rate of the existing horizontal flow precipitation is obviously improved so as to improve the water production capacity of the system.
Owner:天津市华博水务有限公司
Method and apparatus for reducing the precipitation rate of an irrigation sprinkler
InactiveUS20050139696A1Uniform water distributionImprove uniformityMovable spraying apparatusSpray nozzlesStreamflowPiston
A method and apparatus for reducing the effective precipitation rate of an irrigation sprinkler during an irrigation cycle without disrupting the supply of pressurized water from the source opening and closing the inlet to the sprinkler riser at timed intervals through the use of a flow stop valve assembly disposed at the base of the riser, and which includes a lost motion piston and cylinder assembly and first and second flow control devices which control the time the flow stop valve is in the open and closed conditions during the irrigation cycle.
Owner:RAIN BIRD CORP
A method for preparing a selenium-rich feed additive
InactiveCN107484890AIncrease production capacityImprove immunityAnimal feeding stuffAccessory food factorsDry weightOrganic fertilizer
A method for preparing a selenium-rich feed additive is disclosed. The method includes applying a selenium-rich organic fertilizer for Chinese milk vetch in one time before flowering after the beginning of spring, watering the Chinese milk vetch for one time if no effective precipitation occurs in seven days after fertilization, harvesting two thirds of overground parts after the Chinese milk vetch is ripe, and drying and crushing the harvested Chinese milk vetch to prepare the selenium-rich feed additive. The dry-weight selenium content of the selenium-rich Chinese milk vetch is 3-50 mg / kg. The harvested selenium-rich Chinese milk vetch is dried in a dryer having a temperature of 80-120 DEG C until a constant weight. The dried selenium-rich Chinese milk vetch is crushed by a crushing machine into powder particles having a size of 80-200 meshes. 20-500 kg of the selenium-rich organic fertilizer is applied per mu. Through converting inorganic selenium into organic selenium through the Chinese milk vetch, storing the organic selenium in the Chinese milk vetch, and preparing the Chinese milk vetch into the additive for animal feed, production performance and immunity of livestock and poultry can be effectively improved, selenium-rich eggs and selenium-rich meat can be produced, and a selenium poisoning hidden danger caused by addition of the inorganic selenium into feed can be solved well.
Owner:安徽微源生物科技有限公司
Microbial sewage treatment agent for domestic sewage treatment
InactiveCN107215965AHandle large batches quicklyImprove adsorption capacityFungiBacteriaPichia pastorisBacillus megaterium
The invention discloses a microbial sewage treatment agent for treating domestic sewage, which comprises the following components: D370 anion exchange resin, Pichia CGMCC 2.1801, Bacillus megaterium CGMCC 1.223, aluminum sulfate, activated carbon and cottonseed hulls. Microbial sewage treatment agent can be directly used for sewage treatment, especially nitrogen, phosphorus and potassium in domestic sewage, in which the removal rate of nitrogen can reach about 95%, the removal rate of phosphorus can reach about 88%, and the removal rate of potassium can reach 87% Left and right, the microbial sewage treatment agent D370 anion exchange resin has the ability to effectively absorb heavy metals in sewage, Pichia pastoris CGMCC 2.1801, and Bacillus megaterium CGMCC 1.223 can effectively adsorb elements such as nitrogen, phosphorus, and potassium, and cottonseed hulls can effectively precipitate harmful substances such as impurities in water. The treatment agent will not cause secondary pollution to the environment, is an environmentally friendly preparation, and can quickly treat sewage in large quantities.
Owner:南京爱斯利尔环保设备工程有限公司
A film-covering cultivation method suitable for planting Codonopsis pilosula in arid mountainous areas
ActiveCN105284329BIntegrity guaranteedFacilitate complete recyclingPlant protective coveringsVegetative propogationDiseaseArid
Owner:甘肃琦昆农业发展有限公司
An Analysis Method of Water Requirement for Irrigation Levels of Farmland
ActiveCN107491844BSolve the problem of large calculation inaccuracy and deviationImprove irrigation water use efficiencyGeneral water supply conservationForecastingWater useSoil science
The invention provides a method for analyzing the water demand of farmland irrigation levels. The method comprises the following steps: analyzing the rigid water demand of farmland irrigation according to the theoretical water demand and effective precipitation in the growth period of crops; The elastic water demand for farmland irrigation is analyzed by coefficient; the luxury water demand for farmland irrigation is analyzed according to the actual utilization coefficient of irrigation water which is lower than the effective utilization coefficient of advanced farmland irrigation water recommended by the local area. According to the method for analyzing the water demand of farmland irrigation levels in the embodiment of the present invention, the problem of inaccurate calculation of the water demand for farmland irrigation is solved, and the water demand for farmland irrigation is analyzed and calculated in different levels, so that the water demand of each level of farmland irrigation can be accurately analyzed and calculated. , improve the efficiency of farmland irrigation water use, save water resources, point out the direction for the management and control of farmland irrigation water use, and provide a reliable basis for irrigation water management guidance and planning and allocation.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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