221 results about "Liquid water content" patented technology

A method for detecting ambient conditions conducive to ice formation. The method includes the steps of measuring at least one parameter selected from a group of parameters consisting of a static pressure, a total pressure, a total temperature, a dew point temperature, and a liquid water content, and determining whether ambient conditions are conducive to ice formation based on the measured parameter.

A sludge solidification method is a method for carrying out solidification treatment to the sludge produced in water conservancy projects and civil engineering. The method is that: a. the liquid water content, the clay content and organic content of dredging sludge are tested. b. curing agent is prepared: the curing agent mainly contains cement and calcium oxide which play the function of solidification; wherein, the weight proportion is between 1 : 1 to 4 : 1; waste gypsum is used as water reducing agent which occupies 1 to 8 percent of the sum of cement and calcium oxide in proportion; mealy sand or pulverized fuel ash are used as concrete aggregate which occupies 3 to 5 percent of the sum of the cement and calcium oxide in proportion; c. the curing agent-mixing ratio which is usually controlled from 5 to 20 percent is determined; sampling respectively is carried out, setting time is tested and the unconfined compressive strength which maintains 7, 14 and 28 days is tested by sampling, and the curing agent-mixing ratio finally is determined according to optimal performance price ratio; d. the sludge is carried out curing and constructing in site; mechanical devices are used for stirring the curing agent and the sludge rapidly and evenly, thereby leading the solidification to be rapid and full.

An apparatus for detecting icing conditions on an aircraft includes a laser system configured to direct a light signal into a cloud, a lens component configured to collect echo signals from a cloud caused by the light signal directed into the cloud, a beam splitter component configured to redirect signals received and passing through the lens component into at least first and second paths and a supercooled large droplet (SLD) detector to receive the redirected signals. The SLD includes a first signal detector component configured to perform a first color measurement on the first redirected signal, and a second signal detector component configured to perform a second color measurement on the second redirected signal. The SLD detector is configured to use the first and second color measurements to determine liquid water content and droplet diameter distribution for the cloud.

A deicing system includes dual deice system components to provide a redundant deice system. Each redundant portion of the system generally includes a controller, an air data computer, an ice rate controller, and an ice rate probe. The controller communicating a heating cycle which defines a multiple of electric pulse trains to sequentially provides power to a multiple of heating elements in a designated blade set. Each electric pulse train is defined by an element on-time, a null time between the element on-time for this element and the next element, and an off-time between repetition of the heating cycle for the first heater element. The element on-time is a function of outside air temperature (OAT). The off-time is a function of liquid water content. The tail rotor heating cycle is a more straightforward version of the main rotor heating cycle as each of the tail rotor blade are activated simultaneously and there is only a single heating element on each tail rotor blade.

The invention discloses an on-line transmission line lightning shielding failure trip early-warning method. The method comprises the following steps of: performing statistics on historical lightning shielding failure trip information to obtain transmission line lightning shielding failure trip probability distribution by a two-dimensional information diffusion theory and a conditional probability method; selecting radar forecast data, such as echo intensity, echo tops and vertical accumulated liquid water content; establishing a lightning current magnitude prediction model based on a back propagation neural network; and sending real-time early warning and an early warning grade of transmission line lightning shielding failure trip probability according to the predicted lightning current magnitude and the side distance to lightning stroke and by virtue of the transmission line lightning shielding failure trip probability distribution model. According to the real-time forecast data of a meteorological radar, the method provided by the invention can predict the trip probability of a transmission line and send an early warning signal, thereby providing reference for decision-making analysis of grid dispatching operators, making a transmission line dispatching strategy in time, improving power supply reliability, lowering economic loss of a grid, and improving the reliable running ability of the grid.

The invention provides a simulation system for an ice-formation condition on a ground, and the simulation system is used for verifying the capacities of preventing/removing ice of tested pieces in an outdoor low temperature environment. The simulation system of the invention comprises a spraying device, a water supplying device, a gas source device, a wind source device and a measurement-control device, wherein the spraying device contains a spraying rod with a nozzle and an affiliated pipeline of the spraying rod, and the affiliated pipeline contains an air inlet pipe and a water inlet pipe; the water supplying device is communicated with the water inlet pipe, and delivers water through purification treatment to the nozzle; the gas source device is communicated with the air inlet pipe, and delivers high pressure air through purification treatment to the nozzle; the wind source device which simulates a wind tunnel delivers uniform and stable airflow to the spraying device; and the measurement-control device controls the whole simulation system, and can display the test parameters in real time. The simulation system for the ice-formation condition on the ground of the invention can simulate the meteorological condition of freezing fog on the ground in the outdoor low-temperature environment, produces water spray with adjustable liquid water content and water droplet diameter, and provides strong guarantee for verifying the capacities of preventing/removing ice of such as a short cabin of an airplane.

The invention discloses an extraction method for a jasmine flower essential oil. The extraction method comprises the following steps: (1) carrying out essential oil adsorption: at the room temperature, adopting a wet air flow to pass through jasmine flowers, then cooling the wet air with the jasmine essential oil to 0-10 DEG C, and removing a part of water; and removing condensed water of the part of water, and adsorbing the essential oil by an adsorbing agent; and (2) carrying out essential oil desorption: adopting a supercritical carbon dioxide fluid to extract activated carbon which adsorbs the jasmine flower essential oil, and thus obtaining the jasmine flower essential oil; and adding a solvent into the condensed water to recycle a spice, and recycling a spice from gas discharged by an induced draft fan. The method treats each ton of jasmine fresh flowers by using about 50 kg of activated carbon, and is low in cost; and the obtained product has low water content and does not easily get metamorphic.

The invention discloses an ice preventing and removing device for helicopter rotors. The device comprises an icing detector, an icing speed solver, an atmospheric temperature sensor, an ice preventing and removing control panel, a digital type ice preventing and removing controller, a main rotor distributor, an empennage distributor, a main rotor ice removing component, an empennage ice removing component, an No.1 AC power supply and an No.2 AC power supply, wherein the icing detector and the icing speed solver transfer liquid water content signals and atmospheric temperature signals to the digital type ice preventing and removing controller respectively, the digital type ice preventing and removing controller carries out computation according to the ice preventing and removing control panel and the input signals to output the control signals of the main rotor distributor and the control signals of the empennage distributor, and the main rotor distributor and the empennage distributor control the main rotor ice removing component and the empennage ice removing component to remove ice. By the ice preventing and removing device, the helicopter can safely fly under server weather conditions, and the safety accidents due to the icing of the rotors and the bad influence of pneumatic configuration caused by too low ambient temperature or too high water content are avoided.

The invention discloses a computing method of model parameters in an icing wind tunnel experiment under a supercooled large droplet condition and aims at solving the problems that an existing parameter selecting method for a supercooled small droplet icing experiment does not function well if being applied to a supercooled large droplet icing experiment and that the real icing condition cannot be reflected by icing on a scale model of the airplane. The computing method of the model parameters in the icing wind tunnel experiment under the supercooled large droplet condition is capable of orderly giving the experimental parameters of a wind tunnel test section such as air velocity, average droplet grain diameter, air pressure, liquid water content, icing time and low supercooled water temperature corresponding to real icing flying conditions by use of a theoretical derivation and numerical computation method after determining the scale relation of the model and the real airplane. An aircraft icing wind tunnel experiment is performed according to the converted test parameters, and the experimental result and the real result are capable of meeting the similarity requirement on the major characteristics of the icing process. As a result, the computing method of the model parameters in the icing wind tunnel experiment under the supercooled large droplet condition is capable of obtaining the model parameters for the icing wind tunnel experiment; the corresponding parameters are capable of reflecting the real icing condition in the icing wind tunnel experiment.

The invention belongs to the food processing technical field, substantially relates to the production method of a convenient nutrition rice tea and the product; the method of the invention is as follows: the raw materials is cleaned, roasted and crushed; and the invention is characterized in that: the raw materials is rice, brown rice or cracked grain; firstly, the raw materials is added with water so as to germinate or ferment, and then are roasted into golden brown with typical rice flavour under 150 DEG C to 250 DEG C, afterwards, which is refrigerated and crushed, and is filtered by an analysis sieve of 10 to 80 meshes, so that the rice flour material is made for standby; lotus seed core,liquorice or honeysuckle are roasted into liquid water content of lower 8% respectively, and then are filtered by the analysis sieve of 10 to 80 meshes for standby; according to the parts by weight, the rice flour material of 40 to 60 parts, the lotus seed core of 0 to 2.0 parts, the liquorice of 0 to 2.0 parts, the honeysuckle of 0 to 2.0 parts or(and)fried rice compound perfume are mixed evenly, and then are packed in ration, thereby the convenient rice tea is got. Compared with the prior technology, the invention adds raw materials ferment or gemmation processing, and increases the ingredients of Chinese medicine which has health care function, therefore, the nutrition of the rice tea can be added and the taste of the rice tea is rich.

Ice accretion on a probe is detected by determining the change of frequency of a vibrating type ice detector or sensor as ice starts to build up. The rate of change of frequency is determined and is combined with parameters including air velocity and air temperature for providing a signal that indicates liquid water content in the airflow as well as ice accretion on the ice detector.

Improved mechanisms for collecting information from a diverse suite of sensors and systems, calculating the current precipitation, atmospheric water vapor, atmospheric liquid water content, or precipitable water and other atmospheric-based phenomena, for example presence and intensity of fog, based upon these sensor readings, predicting future precipitation and atmospheric-based phenomena, and estimating effects of the atmospheric-based phenomena on visibility, for example by calculating runway visible range (RVR) estimates and forecasts based on the atmospheric-based phenomena.

The invention relates to flake-shaped feed for sea cucumber and a preparation method thereof. The ingredients in the feed and the ratios thereof are as follows: sargassum thunbergii dried powder 30%, fish meal 4.5%, fresh kelp 20%with 70% liquid water content, dusty yeast 5%, corn protein 8%, compound enzyme 0.5%, compound vitamin 1%, mineral salt 1%, water 10% and muddy sand 20% with grain diameter of about 100 micron. The preparation method comprises the steps of adding 50% water to the fresh kelp, grinding the kelp with water for 6-7 times through a stuff grinder, adding other ingredients for stirring uniformly after degumming, extruding the mixture of the kelp, the water and other ingredients through a bulking machine at a low temperature of 1-10 DEG C, slicing the mixture into 2mm thick, and drying. The feed in the invention can maintain the shape thereof for more than 24hr without shaping agent; the feed is 2mm thick so that the sea cucumber can easily get and eat the feed and feed consumption of 60% of powder feed is enough; the feed is rich in nutrition, thereby effectively improving the growth rate and the survival rate of the sea cucumber; water changing rate for the flake-shaped feed is only 50% of that for the powder feed, thus avoiding water pollution, reducing water consumption and curtailing production cost.

The invention relates to a preparation method of magnesium phosphate fertilizer, in particular to a method which takes phosphate flotation byproduct tailings in medium low-grade as raw materials to prepare industrial-grade magnesium phosphate fertilizer, and belongs to the field of chemical technology. The preparation method is characterized in that the preparation method comprises the following steps: first: taking flotation phosphate tailing slurry as the raw material, controlling the liquid water content to be between 40 percent and 45 percent; second: leading the tailing slurry in step (1) to a mixed reactor, starting a mixer, and controlling the rotate speed to be 400 r/min to 500 r/min; third: adding parathion mixed acid with a certain molar ratio into the reaction in the mixed reactor in step (2), carrying out chemical reaction when the mixed reactor warms up to a certain temperature, reaches a certain mixed reaction time and goes into a chemical chamber; fourth: delivering fresh magnesium phosphate fertilizer obtained from step (3) into a ripening warehouse for ripening; fifth: smashing the magnesium phosphate fertilizer obtained from step (4) to be directly packed to obtain power-shaped magnesium phosphate fertilizer products; sixth: smashing and delivering the magnesium phosphate fertilizer obtained from step (4) to a back pelletizer for pelleting to make grain-shaped magnesium phosphate fertilizer products.

The invention discloses a method for predicting icing meteorological parameters MVD based on a BP neural network. According to the relationship among the liquid water content LWC listed in the appendix C of the airworthiness standard [CCAR-25-R4] of Chinese transportation aircrafts, the average effective water drop diameter MVD and the ambient air temperature T, icing conditions under different flight conditions are calculated, and an icing thickness database with the ice thickness changing along with time is established; a BP neural network model is trained by using an icing thickness database, and icing meteorological parameters MVD are predicted by taking flight conditions (flight attack angle and flight speed) and temperature provided in real time and a mapping relationship between icing thickness and icing time as input. The method for predicting the MVD by combining the real-time flight parameters and the icing thickness based on the BP neural network is high in precision, smallin error, short in response time, capable of realizing real-time measurement, capable of providing effective and reliable technical support for icing airworthiness certification and considerable in application prospect.

The present invention relates to a method for dehydrating the bloom-forming cyanobacteria. In the method, the bloom-forming cyanobacteria is sifted out and after the large-particle impurities are eliminated, the flocculating agents and the accessory ingredients of the flocculating agents are added in the filtrate and the flocculating agents and the accessory ingredients of the flocculating agents are stirred to be uniform, and the centrifugal dehydration is put into practice so as to obtain the cyanobacteria mud, the liquid water content of which ranges from 86% to 890%. The cyanobacteria muds after being treated is further dehydrated by utilizing a filter press to implement the filter pressing so as to obtain the cyanobacteria cakes, the liquid water content of which ranges from 75% to 80%. Comparing the technical general performance index of the present invention with that of the technology of the same kind, the dehydration treatment can be applied to the cyanophytes salved in mass in the present invention; the algicides are selected as the dehydration synergism promoter in the present invention, thus being beneficial to the release of the intracellular water and greatly enhancing the dehydrating effect; aiming at different uses of cyanobacterias, the flocculating agents are reasonably selected and the two-step approach is adopted to carry out the dehydration in the present invention, thus assuring the quality of the subsequent products while lowering the treatment cost.

The invention discloses a stratus cloud and convective cloud automatic recognition method based on Doppler radar data. The method includes that actually-measured Doppler radar data of a measured point are interpolated in a three-dimensional rectangular coordinate system, layering is performed according to vertical direction height and vertical grid interval, echo strength and horizontal wind field of each height layer are inverted, and corresponding horizontal divergence is calculated; simultaneously three related characteristic parameters are extracted and calculated; divergence characteristic parameters are calculated and extracted through horizontal gradient inversion wind information with maximum echo strength Zmax, vertical liquid water content VIL and maximum echo strength, membership functions are established, membership degree of each characteristic parameter is calculated, finally Pc and Ps are obtained through summation of membership degrees of the different characteristic parameters corresponding to upper layer could and convective cloud of each horizontal grid point, and when the Pc> the Ps, the measured point is determined to be the convective cloud, otherwise the tested point is stratus cloud.

The invention discloses a pig feed additive and a preparation method thereof, belongs to the technical field of feeds, and solves the problems that the existing feed additive is single in raw material and relatively low in effect. The pig feed additive is formed by combining fermentation products with liquid water contents of smaller than or equal to 16wt% obtained by respectively fermenting bacteria liquids of 18 parts of aspergilli group, 18 parts of microzyme group, 30 parts of bacillus group and 40 parts of complex bacteria group in parts by weight. The preparation method comprises the following steps of: preparing a culture medium; cooling; diluting indigenous bacteria; inoculating; fermenting; drying; mixing; and packaging. The feed additive disclosed by the invention contains 20 types of probiotics, and has the effects of adjusting pig intestinal flora balance, controlling intestinal diseases, improving immunity, enhancing digestion function and improving feed conversion rate.

The invention provides a bayberry polyphenol flavone extract, which is obtained by the methods as follows: the fragment of a bayberry plant is used as raw ingredient, ethanol water solution of 50 to 80 percent is added, wherein, the ethanol water solution is 4 to 7 times of the quality of the fragment; the mixture is extracted for 1 to 3 hours at 60 to 100 DEG C in a heat preservation way and is filtered to obtain extracting solution; the volume concentration of alcohol in the extracting solution is adjusted to reach 75 percent to 80 percent; the extracting solution is mixed well, let stand for 0.5 to 2 hours, and then filtered; the alcohol is recovered from filter liquor and is concentrated to obtain macroporous adsorption resin on a paste; the macroporous adsorption resin is eluted by using distilled water, then by using the ethanol water solution of 10 to 20 percent to remove impurities, and then by using the ethanol water solution of 60 to 90 percent at last; eluate is collected to recover the alcohol which is dried until the liquid water content is less than 12 percent, so as to obtain the bayberry polyphenol flavone extract. The invention provides the bayberry polyphenol flavone extract which has three-fold efficacy, namely assistance efficacy on blood lipid reduction, hypoglycemic efficacy, and blood-pressure reduction efficacy, and no similar products are developed and manufactured until now. Compared with existing products at home and abroad, the bayberry polyphenol flavone extract has more overall efficacies, and better effect for regaining normal blood-fat, blood sugar and blood pressure of people in need.

The invention relates to the technical field of wind turbine testing, and discloses an icing test system and method for a wind turbine wing panel. The icing test system for the wind turbine wing panelcomprises a wind tunnel, an air supply system and an icing control system, wherein the icing control system is connected with a refrigeration device and an atomization spraying device, the refrigeration device is used for refrigerating the air flow of the air supply system, and the atomization spraying device is used for mixing mist droplets into the air flow of the air supply system; the wind tunnel is internally provided with a supporting mechanism used for fixing a wind turbine, and the wind tunnel is further internally provided with a laser three-dimensional scanner used for scanning blades of the wind turbine and generating a three-dimensional image. The icing test system carries out simulation control on the wind speed, the liquid water content, the droplet median volume diameter, the temperature and the icing time through the air supply system and the control system, and carries out three-dimensional scanning on the wind turbine wing panel through the laser three-dimensional scanner, thereby being capable of directly obtaining the icing shape of the wind turbine wing panel under a given environmental condition.

The invention discloses a method for measuring the volume water content of a critical soil body during debris flow and a debris flow happening pre-warning method. In order to overcome the shortcoming that the real-time soil body condition change of a pre-warning region can not be accurately reflected because the effective early rainfall serves as an indirect index in an effective early rainfall and real-time rainfall debris flow mode, the invention provides the method for measuring the volume water content of the debris flow critical soil body and a method for pre-warning the happening of the debris flow in a forming region by taking a method for measuring the volume water content of the critical soil body during the happening of the debris flow in the forming region of a debris flow drainage basin as a core by monitoring a coupled result of the volume water content of the current real-time soil body in the forming region and real-time rainfall data in real time. The methods are reliable in theories; a water content sensor is directly used for obtaining the real soil body water content; the debris flow is pre-warned according to the real-time rainfall change; the volume water content of the critical soil body is only required to be determined at first; the index is simple; and the suitability of the methods are high.

Aiming at heat preservation and energy saving required in a plurality of occasions of industrial production and human life, the invention relates to a preparation method of a compound type heat preservation and insulation material, which includes taking inorganic fiber or inorganic fibrous composite or a vacuum insulation panel (VIP) as a heat insulation core and using glass fiber reinforced plastic or sheet metal and the like to cover the surface of the core. The heat preservation and insulation material is low water content, good in heat preservation, long in service life, convenient in use and low in cost, with the normal temperature coefficient of heat conductivity being less than 0.025W/m.k.

The invention discloses a backstepping method for determining a meteorological parameter MVD based on a wing icing thickness, and relates to the technical field of ice shape prediction and detection of aircraft icing. The meteorological parameter MVD can be detected in real time without changing shapes of wings during flight, and the backstepping method isapplied to aircraft icing airworthiness certification, and icing environment conditions that meet requirements are detected. The backstepping method comprises the steps that icing conditions under different flight conditions are calculatedaccording to the relationship amonga liquid water content LWC, an average effective droplet diameter MVD and an ambient air temperature T,and an icing thickness database of the icing thickness changing with times is established; and flight conditions, the temperature T, and a h-t curve of the icing thickness changing with the timesare provided in real time, time-icing thickness interpolation and a standard deviation are calculated by using aconstant correction positive coefficientinverse distance weighted interpolation algorithm, and the backstepping optimal MVD value is determined by the least square method. The backstepping method for determining the meteorological parameter MVD based on the wing icing thickness is high in accuracy and small in error, the real-time measurement can be achieved, the icingairworthiness certification is provided with an effective and reliable technical support, and the application prospect is promising.