50 results about "Cloud seeding" patented technology

The invention provides a method for estimating the non-point source pollution load of a northern plain farmland area based on rainmaking experiments, and belongs to the field of agricultural non-point source pollution loading capacity estimation. The method mainly comprises the following steps: 1), field scale: carrying out rainmaking simulated experiments, monitoring rainfall capacity, rainfall duration and runoff coefficient, monitoring pollutants of collected runoff water, mastering surface runoff and pollutant output characteristics of a farmland in a research plot, confirming a localized output coefficient, and establishing localized non-point source output characteristic database; and 2), catchment scale: establishing a perfect output model database according to related data, and carrying out non-point source pollution load model estimation. The non-point source pollution loading capacity (including surface generation loading capacity, flowing into river loading capacity and entering into receiving water loading capacity) of the farmland area is calculated according to a formula; and the spatial distribution is analyzed. According to the method, accuracy for non-point source pollution load estimation of the farmland area can be improved, and decision support is provided for non-point source pollution identification and pollution control.

A buoyant hydrodynamic pump is disclosed that can float on a surface of a body of water over which waves tend to pass. The pump incorporates an open-bottomed tube with a constriction. The tube partially encloses a substantial volume of water with which the tube's constriction interacts, creating and / or amplifying oscillations therein in response to wave action. Wave-driven oscillations result in periodic upward ejections of portions of the water inside the tube that can be collected in a reservoir that is at least partially positioned above the mean water level of the body of water, or pressurized by compressed air or gas, or both. Water within such a reservoir may return to the body of water via a turbine, thereby generating electrical power (making the device a wave engine), or else the device's pumping action can be used for other purposes such as water circulation, propulsion, or cloud seeding.

The invention relates to a method for continuously drawing humid and hot air on the ground according to the chimney effect by utilizing a chimney type air guide tower so that the humid and hot air rapidly floats to break the up-and-down convection of the humid and hot air and dry and cold air by the greenhouse effect and achieve the aims of controlling ground air temperature and humidity, reducing carbon dioxide and dust concentration in ground air and artificially raining and environmental air conditioning equipment. The application of the technology realizes the aim that people reform nature by utilizing nature. The method and the equipment can be used for controlling the temperature and the humidity of urban ground air and carrying out artificial rainfall and also used for preventing great loss on agriculture, forestry, electric industry, communication industry, and the like by natural disasters, such as strong wind, rainstorm, thunder, lightning, hail, and the like due to strongly convective weather; meanwhile, cool weather is more beneficial to the growth of crops and prevents damage by diseases and insects. In the aspect of fishery, the invention can improve the oxygen dissolving amount of a pond and prevent the generation of the phenomenon of fish dead by pond turn-over; meanwhile, cool water temperature is more beneficial to the growth of aquatic animals and plants.

A method and device for inverting a phase change process of water vapors in cloud based on a ground-based microwave radiometer are provided. The method includes obtaining the actually measured data ofa vertical detection target area of the ground-based microwave radiometer and checking data consistency; using the actually measured data and a cloud threshold to identify a mixed phase state cloud region and to calculate an air pressure profile; using the actually measured data in combination with the calculated air pressure profile, calculating each water vapor pressure profile in the cloud; and inverting the phase change process of water vapors in cloud by using a water vapor phase change model. The method solves a problem that it is difficult for a conventional dual-polarization radar toaccurately recognize a particle phase state due to a low signal-to-noise ratio and a satellite can only recognize the phase states of the water cloud and the ice cloud on to top of the cloud, and canobtain the phase change process with time and space of water vapors in the mixed phase cloud of the target region, reflects the dynamic trends of the balance between the solid, liquid, and gaseous states of water vapors in the cloud, is particularly applicable to predicting and forecasting rainfall phase states, analyzing the evolution characteristics of cloud microphysics, and determining artificial precipitation (hail prevention) cloud seeding positions and selecting right time for the job.

Present invention discloses a plane precipitation enhancement system. It contains 1, weather early-warning system, 2, decision making system, 3, flying dynamic positioning, 4, validity check, 5, database and management. Present invention calculates ice saturation zone of each negative temperature layer, water vapor vertical feeding zone, water vapor integrated quantity etc indices volume on basic physical quantity computational foundation, for determining plane precipitation enhancement cloud seeding zone. On validity check, said invention adopts active contrast area and influence zone method according to operational zone silver iodide particle diffused concentration to determine plane precipitation enhancement influence zone, adopting simple times weather system layering history reversion or regional correlation statistical method to determine precipitation enhancement quantity. Said invention establishes complete service technology system.

The invention discloses a cloud monitoring system based on an intelligent balloon group, an artificial rainfall system based on the intelligent balloon group and a control method of the artificial rainfall system. The control method comprises steps that intelligent balloons in the first total preset quantity are placed at different place points, and first environment parameters on intelligent balloon motion locus are respectively detected; first environment parameters of a pre-determined atmosphere area are acquired according to the first environment parameters on the intelligent balloons motion locus of the intelligent balloons in the total first preset quantity; intelligent balloons in the second total preset quantity are placed at place points which are adjusted according to the first environment parameters of the pre-determined atmosphere area, and artificial rainfall is carried out. The method is advantaged in that the environment parameters of the pre-determined atmosphere area can be acquired through the multiple intelligent balloons, the place points of the intelligent balloons and catalyst spreading positions are adjusted according to the environment parameters of the pre-determined atmosphere area, and the artificial rainfall is realized.

The invention discloses an electromechanical time fuse of an antiaircraft gun hail-mitigating cloud-seeding round. The fuse comprises an upper body 1, a wind cap 2, an electromechanical timing ignition mechanism 3, a fuse body 4, a ball rotor safety and arming mechanism 5 and a booster 7, wherein the wind cap 2 covers the front end of the upper body 1, the bottom of the wind cap 2 is closed and fixed in an annular groove in the outer side of the upper body 1, the electromechanical timing ignition mechanism 3 comprises a magnetic recoil power supply and an electronic timing and ignition module,and is positioned inside a cavity of the upper body 1, the rear end of the electromechanical timing ignition mechanism 3 is adjacent to a primary-explosive-free detonator 17, the ball rotor safety and arming mechanism 5 is located inside a cavity of the fuse body 4, the top end of the ball rotor safety and arming mechanism 5 is adjacent to the primary-explosive-free detonator 17, a bulge part ofthe front end of the booster 7 is adjacent to the ball rotor safety and arming mechanism 5, the rear end of the booster 7 serves as a fuse output end, and the the booster 7 is used for initiating projectile charges. According to the electromechanical time fuse of the antiaircraft gun hail-mitigating cloud-seeding round, the timing is accurate, the manufacturability is good, and the reliability ishigh.

The utility model discloses a novel artificial weather influencing system. Meteorological environment data can be collected in a specified detection area through a pilotless aircraft; when it is determined that cloud-seeding operations can be carried out according to the meteorological environment data, the pilotless aircraft is controlled to ignite or scatter articles carried by the pilotless aircraft and used for artificial precipitation in the detection area. Compared with the prior art, due to the fact that the system does not need to be controlled manually by a pilot, labor resources cannot be much wasted in the artificial precipitation operation process. Meanwhile, a ground artificial precipitation subsystem serves as an effective addition for the pilotless aircraft to achieve the artificial precipitation operations, and accordingly the novel artificial weather influencing system can be used for completing the artificial precipitation operations through different artificial precipitation ways, and the success rate of the artificial precipitation operations is improved.

The invention relates to an adjustable debris flow starting simulation experiment system under combined action of rainfall and confluence. The bottom of a material tank of the experiment system can bereplaced, so that not only can the matching degree of the roughness of the bottom of the tank with an original experiment soil body be ensured, but also the water permeability of the bottom of the tank can be fully considered; the width of the material tank of the experiment system can be adjusted according to the characteristics of debris flow in an area, so that the universal applicability is realized; an artificial rainfall system of the experiment system expands the continuously-varying rainfall intensity range, can fully consider the similarity between an artificial rainfall type and a rainfall process and can achieve the purpose of characterizing the corresponding encounter process by adopting rainfall, rain intensity and rainfall type; water for simulating rear confluence scour inthe debris flow starting test can be proportioned into a certain concentration, so that the similarity of experimental flow concentration is ensured; the experiment simulation device can achieve integrated control, avoid tedious steps during the experiment operation and classify experiment wastes at the end of an experiment.

The invention discloses a debris flow starting test artificial rainfall simulating method. The adopted debris flow starting test artificial rainfall simulating system comprises an artificial rainfalldevice, a rainfall monitoring device and a control device, wherein the artificial rainfall device comprises a water tank, a water pump, a rainfall bracket and a rainfall spray head; the rainfall sprayhead is arranged on the rainfall bracket and is connected with a water tank through a water pipeline; the water tank is connected with a water pump; the rainfall monitoring device records actual rainfall capacity, soil moisture content, soil displacement of soil and the tension amount of a tension sensor, and sends the detected data to the control device; the control device judges whether a debris flow happens according to the collected data, and records the slope runoff, slope internal runoff, soil body creep deformation and the debris flow forming time when the debris flow happens. The method disclosed by the invention is simple in structure and convenient to operate, and can be used for detecting the debris flow happening process by simulating different rainfall types; the detection result is quick and accurate, and a basis is provided for predicting and forecasting debris flow.

The invention relates to a top potential energy catapult rainmaking method and system based on a smart grid and the hill lie. According to the method and system, upward tracks and downward tracks of water bin type upward and downward track cars are arranged based on the hill lie, a catapult flying track and a track end fixed pulley set are arranged up the hill, track upper and lower end fixed pulleys are arranged down the hill, a cable connected with the upward track car is wound around the upper end fixed pulleys, the end fixed pulley set and the upper end fixed pulleys in sequence and then is connected with the downward track car, and the upward track car is connected with the downward track car through a cable wound around the two lower end fixed pulleys; an upward reciprocating car and a downward reciprocating car for catapulting a rainmaking fixed wing electric unmanned aerial vehicle are fixedly connected to two cable sections on the flying track respectively; the upward and downward track cars are provided with water bins and downward impact kinetic energy buffering and recovering devices; a high-level reservoir and a low-level reservoir are arranged up the hill and down the hill, wherein the low-level reservoir drives a water pump to raise water to the high-level reservoir through off-peak electricity of the smart grid, the high-level reservoir and the low-level reservoir make water flow into the water bins and receive the water from the water bins separately, the electric unmanned aerial vehicle blows off the water to the low-level reservoir from the high-level reservoir to generate electricity and charge in the period of the peak demand for electricity, and direct charging is performed through the smart grid in the period of off-peak for electricity. The Top potential energy catapult rainmaking method and system have the advantages that cost is low, applicability is high, the rainmaking effect is good, and the general problem of water lack can be solved within short term.

Present invention discloses a precipitation enhancement optimum economic benefit zone selecting and quantifying evaluation system. It contains 1, first determining macroscopy cloud seeding indices, determine operational zone range according to water vapor integrated quantity of ice saturation zone, zone of uplift and above 0 degree centigrade layer, determine optimum main crops economic benefit zone as cloud seeding zone on satisfying cloud seeding conditional area.2, cropper water need indicial diagnoses and determine , 3, calculating asynchronization section amount of precipitation to crop yield contribution, 4, making quantify evaluate to precipitation enhancement agricultural economy, 5, antecedent precipitation index to precipitation enhancement economic benefit influence, 6, calculating total precipitation enhancement economic benefit according to main crops each mm precipitation enhancement economic benefit in different zone. Present invention increases precipitation enhancement scientificaalness and technologic progress.

The invention discloses an artificial rainfall simulating device for a debris flow test, wherein the device can be used for simulating different rainfall types and establishing debris flow starting models under different rainfall types, so as to provide a basis for predicting and forecasting debris flow. The rainfall is simulated by an artificial rainfall device, and the soil layer change under different rainfall amounts is monitored by a rainfall monitoring device; a control device records the slope runoff, slope internal runoff, soil body creep deformation and the debris flow forming time when the debris flow happens, and can establish a debris flow starting model under different rainfall types. In the device disclosed by the invention, a pressure control valve can perfectly filter solidparticles, phytoplankton and the like in river water, thereby being energy-saving and environment-friendly and prolonging the service life of a spray head.

A buoyant hydrodynamic pump is disclosed that can float on a surface of a body of water over which waves tend to pass. The pump incorporates an open-bottomed tube with a constriction. The tube partially encloses a substantial volume of water with which the tube's constriction interacts, creating and / or amplifying oscillations therein in response to wave action. Wave-driven oscillations result in periodic upward ejections of portions of the water inside the tube that can be collected in a reservoir that is at least partially positioned above the mean water level of the body of water, or pressurized by compressed air or gas, or both. Water within such a reservoir may return to the body of water via a turbine, thereby generating electrical power (making the device a wave engine), or else the device's pumping action can be used for other purposes such as water circulation, propulsion, or cloud seeding.

This invention consists of a unique apparatus and system consisting of devices, materials and methods specially engineered to perform high precision and smart cloud seeding by the dispersion of micro and nanoparticles of sodium chloride and similar chemistry compounds at specific locations with the purpose of rain induction and related applications. A safe and precise unmanned aerial vehicle UAV device instrumented with portable thermometer, hygrometer, barometer, anemometer and 3D visual register will scrutinize these internal cloud climate parameters. By means of these real time measurements and communications, a meteorological ground operating team is enabled to perform the data acquisition and processing from the clouds. This device and system be enabled to select the locations suitable for rain induction and perform on site accurate particulate seeding dispersion from a device mounted on the same UAV within the eligible clouds. Typical applications of this apparatus and system besides rain induction are fog condensation for airports, highways and other environments where visibility impairment may have critical consequences. This invention may also provide a valuable tool to provide solutions to control and mitigate snow, sleet and hail effects.

The invention encompasses multi-stage naturally amplified global-scale carbon dioxide capture systems combining basic capture from (CCS—carbon capture and sequestration) clean-coal-fired and CCS gas-fired power plants, CCS natural-gas reformation systems, CCS cement plants, outdoor air, CCS home and building flues, CCS incinerators, CCS crematoriums, CCS blast-furnaces, CCS kilns, CCS refineries, CCS factories, CCS oil gasification systems and CCS coal gasification systems which yield concentrated carbon dioxide, with a collective, globally distributed capture capacity of up to 3 GtC / yr, feeding the captured carbon dioxide into land-based invention stage-1 bioreactors for rapid, selective, high capacity conversion to a high-density, fast-sinking marine algae by means of accelerated photosynthesis and / or coccolithogenesis (calcification) consuming carbon dioxide as the algae bloom, and transporting a primary fraction of the stage-1 bioreactor-produced algae to seaports for seeding the oceans at regular intervals in stage-2 operations-at-sea to produce naturally amplified 14 GtC / yr algal blooms at sea, the stage-2 operations circumventing classic prior-art (and natural) ocean fertilization limits of low bloom rate, grazers eating algae seed before it blooms, interfering buoyant algal species which don't clear the photic zone to allow light penetration for multiple blooms per year, and proximal post-bloom anoxia, and reserving a secondary fraction of the stage-1 bioreactor produced algae for feeding cultures of ocean grazers contained in a second bioreactor, in which the second bioreactor produces dimethylsulfide (DMS), a natural cloud seeding agent as the bioreactor-contained ocean grazer cultures eat the secondary fraction of stage-1 original bioreactor-produced algae. A total invention CO2 capture and safe storage capacity of 17 GtC / yr (land and sea) is projected during fair-weather, and a 40% foul weather down-time allowance ensures that an average 10 GtC / yr of impact capture would result. If emissions are concurrently capped by at 12 GtC / yr by 2023, with invention-assisted reduction to 6 GtC / yr by 2050, 3 GtC / yr by 2062, and 1 GtC / yr by 2078, atmospheric CO2 will be reduced to 280 ppm by 2075. The CIP invention production of DMS (both inland invention DMS production and invention ocean-amplified DMS production following ocean-amplified algal blooming and ocean-amplified capture of atmospheric CO2) may be used to seed rain-clouds over or adjacent to semi-arid lands, enabling drought and famine relief. If the rain clouds are seeded adjacent to semi-arid lands, winds may drive the rain clouds over the drought stressed lands.A spin-off technology includes use of excess dead bioreactor algae for agricultural soil spreads to enhance soil moisture retention—which is important in maximizing drought relief.

The invention discloses a method and a device for artificial simulated rain and atomization. The device comprises a dual-purpose water-gas nozzle, a high-pressure gas guide pipe, an air compressor and a frequency converter, wherein a water inlet of the dual-purpose water-gas nozzle is connected to a water supplying end of a rainfall pipeline, a gas inlet of the dual-purpose water-gas nozzle is connected to one end of the high-pressure gas guide pipe, the other end of the high-pressure gas guide pipe is connected to the air compressor, and the air compressor is connected to the frequency converter. During light rain or heavy rain, the air compressor is opened, the air with the pressure is mixed with the rainfall through the dual-purpose water-gas nozzle, the rainfall is jetted through high-pressure gas, the preset spraying angle and atomization effect are achieved, and the defect of a prior artificial rainfall device is avoided. Besides, the frequency converter is adjusted, the output air pressure of the air compressor is adjusted in accordance with the strength of rain, and the optimized effect is achieved. The device is simple to operate, convenient to use and good in practical value.

The invention is suitable for the field of weather modification, and provides an evaluation method for the effective catalytic range of an airplane cloud seeding operation catalyst. The method comprises the following steps: installing and compiling a mesoscale numerical model WRF (weather research and forecasting); acquiring FNL data of the mode background field; setting WRF multiple nested simulation areas; acquiring a WRF high-resolution analog output field; installing a FLEXPART-WRF numerical model; preparing a list file SPECIES of physical and chemical characteristic parameters of an AgI (silver iodide) catalyst; designing a typical catalyst seeding source term input scheme; acquiring an AgI catalyst concentration simulation result; calculating the effective catalytic range. Accordingto the method, the problem about evaluation of the effective catalytic range of the catalyst based on the airplane cloud seeding operation mode is solved; the method can not only be used for guiding the operation practice and verifying effectiveness of a cloud seeding scheme, has great significance for standardizing the cloud seeding method, improving operation design, reducing operation blindnessand improving the operation effect, and can be popularized to evaluation of the effective catalytic range of other catalyst seeding modes of antiaircraft guns, rockets, ground combustion furnaces andthe like.

The invention discloses a projectile internal charging structure for preventing flame-over ignition of a fuse in an explosive-proof state. The projectile internal charging structure comprises an explosive-proof type fuse 5, a flame isolation part 2, propellants and explosives 3 and a charging projectile 4, wherein the explosive-proof type fuse 5 is located on the top of a projectile, the bottom end of the explosive-proof type fuse 5 is provided with a detonating tube 1, and the flame isolation part 2 is arranged between the detonating tube 1 of the explosive-proof type fuse 5 and the chargingprojectile 4 and is in close contact with the detonating tube 1 of the explosive-proof type fuse 5 and the charging projectile 4. The flame isolation part is used for isolating the fuse from leaked high-temperature and high-pressure gas caused by cracking or breaking of structures like a fuse body due to accident ignition of sensitive explosion elements like a detonator inside the fuse in the explosive-proof state, and the situation that the gas flows to the explosive loading surface of the projectile or a battle part to cause combustion and explosion by accident is prevented. The flame isolation part is in close contact with the detonating tube and the explosives in the projectile, and the occupied axial space is very small. By means of the projectile internal charging structure, safety of the projectile or the battle part is improved, and the structure is suitable for small-bore shells, especially small-bore anti-hail cloud-seeding shells with small-size and low-mass fuses.

The invention relates to an electro-climatology ion trapping artificial rainfall fresh water producing universal machine group and control system. An ozone-free high-performance negative oxygen ion generator forms a universal machine unit of the universal machine group system, a plurality of units form an artificial rainfall base, a plurality of bases form the system, and artificial and intelligent automatic control is executed. The invention belongs to an application of air ionization in the electro-climatology field and is an improvement on the traditional snowslide type ionization or plasma ionization technology 'adopted' in the United Arab Emirates 'revolutionary' artificial rainfall by adopting a new ion technology; as torrential rain falls for fifty two times in one year during the experiment in the United Arab Emirates, further improvement and innovative design are carried out in the system in the invention, the cost performance of the whole system can be greatly improved, and multiple innovative inventive concepts are adopted, for example mobile equipment substitutes or supplements fixed equipment, thus the most economical optimal control scheme is hopeful to be realized under the support of artificial intelligence, the problem that fresh water is short in the world can be effectively solved, thus the system makes major contribution to survival and development of earthman.

The invention relates to the technical field of artificial rainfall, and provides an artificial rainfall agent and a preparation method and application thereof. The artificial rainfall agent comprisessodium chloride particles and titanium dioxide coatings coated on the surfaces of the sodium chloride particles. The artificial rainfall agent provided by the invention is non-toxic and harmless, hasstrong water vapor adsorption capacity, can improve the artificial rainfall efficiency and rainfall capacity, and can be used as condensation nucleus to continuously increase water drops and ice crystals in the cloud and reduce the water drops and ice crystals into rain when being scattered in the cloud layer. In the rainfall process, raindrops enable tiny dust particles and the like to fall ontothe ground, so that the effects of removing haze and reducing PM2.5 are achieved. Besides, titanium dioxide has a photocatalysis effect and can degrade pollutants in air and water, so that the haze removal effect is further improved. When the artificial rainfall agent provided by the invention is applied to artificial precipitation enhancement, hail suppression and haze treatment, an excellent effect can be achieved.

The invention provides a method for estimating the non-point source pollution load of a northern plain farmland area based on rainmaking experiments, and belongs to the field of agricultural non-point source pollution loading capacity estimation. The method mainly comprises the following steps: 1), field scale: carrying out rainmaking simulated experiments, monitoring rainfall capacity, rainfall duration and runoff coefficient, monitoring pollutants of collected runoff water, mastering surface runoff and pollutant output characteristics of a farmland in a research plot, confirming a localized output coefficient, and establishing localized non-point source output characteristic database; and 2), catchment scale: establishing a perfect output model database according to related data, and carrying out non-point source pollution load model estimation. The non-point source pollution loading capacity (including surface generation loading capacity, flowing into river loading capacity and entering into receiving water loading capacity) of the farmland area is calculated according to a formula; and the spatial distribution is analyzed. According to the method, accuracy for non-point source pollution load estimation of the farmland area can be improved, and decision support is provided for non-point source pollution identification and pollution control.

The invention discloses a simulation method for researching biological crusts in the water and soil loss situation of a karst rocky desertification area, and belongs to the technical field of environmental research. The simulation method comprises the following steps: S1, artificially cultivating moss crusts to prepare soil samples in a target area; S2, stacking the soil samples at least twice tobe put into simulation boxes; S3, taking one simulation box as a blank control group, and transplanting moss crusts on the upper top surfaces of the soil samples in the remaining simulation boxes; S4,simulating natural rainfall conditions, and carrying out alternate artificial rainfalls on the simulation boxes; and respectively collecting a runoff mud-water mixture on the surface layers of the soil samples and a bottom runoff mud-water mixture in the simulation boxes in a single rainfall process; S5, separating the mud-water mixtures, and weighing and recording the mud-water mixtures; and S6,calculating a runoff coefficient, a sediment yield specific gravity and a sediment transport modulus. The simulation method solves the problem of lack of research means for influence of biological crusts on water and soil loss in the karst rocky desertification areas at present.

The invention discloses an artificial rainfall method and device, and relates to the technical field of unmanned aerial vehicles. A specific embodiment of the method comprises the steps of obtaining position information of a rain accumulation cloud; calculating a to-be-measured humidity position according to the position information of the accumulated rain cloud, and sending a flight instruction of flying to the to-be-measured humidity position to a first unmanned aerial vehicle; and receiving humidity information returned by the first unmanned aerial vehicle, determining a sowing position according to the humidity information, and sending a flight instruction of flying to the sowing position to a second unmanned aerial vehicle. According to the implementation mode, the technical problemsthat the sowing cost is high and the sowing position accuracy is low can be solved.

The invention relates to a method for stopping severe weather disasters. The method includes the following steps that firstly, an existing weather technology is adopted for finding a zone where dense clouds accumulate; secondly, the densest or the thickest or the hottest cloud seeding position is set in the clouds; thirdly, one or more long cloud seeding belts are set on the cloud seeding position to carry out artificial rainfall, so that the cloud-seeded cloud is cooled and rains, and the temperature, the density and the measuring range of the clouds are lowered to release hot air under the clouds. The cooled clouds will flow to the peripheral hot clouds and sequentially cool the hot clouds to make the hot clouds rain. Thus, the natural conditions for forming the natural disasters are eliminated.

The invention discloses a cloud-seeding operation effect radar detection time sequence contrast analysis method and device. The method comprises the steps: selecting a natural cloud unit as a contrast unit of a cloud-seeding operation unit, wherein the natural cloud unit is the most similar to the cloud-seeding operation unit; extracting a third radar detection time subsequence of the cloud-seeding operation unit after an operation moment; comparing the third radar detection time subsequence with a fourth radar detection time subsequence of the contrast unit for analysis; removing the difference between a first radar detection time subsequence and a second third radar detection time subsequence of the cloud-seeding operation unit and the contrast unit before the operation moment, and determining a cloud-seeding operation effect. Compared with the scheme in the prior art, the method removes the inaccuracy, caused by natural changes of the natural cloud unit, of the determination of the cloud-seeding operation effect to the greatest extent, so the method provided by the invention can obtain more accurate cloud-seeding operation effect.

The invention discloses a multiple-node hot standby method of metadata service nodes in cloud storage service. The multiple-node hot standby method comprises the steps that (A) at least three metadata service nodes are set in a cloud storage system, one metadata service node is selected out to serve as a mainframe node, and the other metadata service nodes serve as standby machine nodes; (B) the mainframe node provides metadata update service and synchronizes updated metadata to the standby machine nodes; (C) when the mainframe node breaks down, one standby machine node is selected from the standby machine nodes to serve as a new mainframe node. By means of the multiple-node hot standby method, single-node faults of the metadata service nodes can be effectively prevented, and accordingly the data safety of the whole system is improved.

The invention discloses an artificial rainfall simulation device for debris flow testing. The pressure of a water tank can be flexibly adjusted conveniently through the device, corresponding pressurecan be set according to the underlying conditions and rainfall characteristics of an area, so as to further control the rainfall type; the concentration phenomenon of area point rainstorm can be simulated through regulating the internal pressure of sub water tanks; through closing one or more of the sub water tanks, and the rainfall process under windy weather can be simulated, and the rainstorm type can be simulated through overlapping the rainfall area; the rainfall data can be input through a computer system, the rainfall type can be accurately and rapidly controlled by controlling a pressure control valve through a controller; and the pressure control valve can be used for well filtering solid particles, phytoplankton and the like in river water, so that the energy conservation and environment protection can be achieved, and the service life of a nozzle can be prolonged.