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30results about How to "Determine the time" patented technology

Method for calculating earliest time of Beidou medium earth orbit satellite graveyard orbit to cross orbits of other global satellite navigation systems

ActiveCN109613574AQuickly determine the eccentricity thresholdDetermine the timeSatellite radio beaconingOrbitMarine navigation
The invention provides a method for calculating the earliest time of a Beidou medium earth orbit satellite graveyard orbit to cross orbits of other global satellite navigation systems. The method comprises the following steps: respectively calculating a threshold value of an eccentricity when the Beidou medium earth orbit satellite graveyard orbit crosses the orbits of other global satellite navigation systems according to the altitude of the Beidou medium earth orbit satellite graveyard orbit, the altitude of a GLONASS satellite, the altitude of a GPS satellite and the altitude of a Galileo satellite; performing a long-term evolution on the Beidou medium earth orbit satellite graveyard orbit to obtain an eccentricity after evolution based on an orbit long-term evolution model; and recording a time at which the eccentricity after evolution reaches the threshold value of the eccentricity when the Beidou medium earth orbit satellite graveyard orbit crosses the orbits of other global satellite navigation systems, wherein the time is the earliest time of the Beidou medium earth orbit satellite graveyard orbit to cross the orbits of other global satellite navigation systems. By adoptingthe method, a reference can be provided for the safety analysis of the long-term evolution of a medium earth orbit navigation satellite graveyard orbit.
Owner:PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV

Water and fertilizer integrated fertilization method based on crop root growth distribution rule

PendingCN114303560AAccurately determine the ratio of water to fertilizerAccurate timeFertilising methodsSoil scienceSoil depth
The invention belongs to the technical field of crop fertilization, and discloses a water and fertilizer integrated fertilization method based on a crop root growth distribution rule, and the method comprises the following steps: planting crops and reference crops at the same time; calculating root system distribution of the reference crop through a calculation terminal, generating different soil layers along a vertical line direction through simulation, and calculating water and fertilizer proportions of the different soil layers; detecting root system distribution conditions of reference crops in different soil layers through a detection device; burying an infiltrating irrigation pipeline in the infiltrating irrigation pit by taking the crop stalk as a circle center; mixing the crop fertilizer with water to obtain a liquid fertilizer; the irrigation water mixed with the liquid fertilizer flows into the soil through the infiltrating irrigation pipeline for fertilization, and the flow of the liquid fertilizer output by the infiltrating irrigation pipeline is controlled according to the three-dimensional fertilization proportion control model. According to the invention, the root system distribution of the reference crop is calculated through the calculation terminal, so that the water-fertilizer proportion and the infiltrating irrigation time required by crop roots in different soil depths can be accurately determined.
Owner:罗甸县中等职业学校

Food product heat treatment apparatus and method for food product heat treatment

The invention relates to a food product heat treatment apparatus for heat treatment of heat-sensitive fluid food products, such as whey protein concentrate, baby food and cheese milk, comprising an inlet (21) for supplying the food product, an outlet (22) for discharging the heat treated food product, a holding device (23) downstream the inlet (21) for holding the food product for a specific time at a specific temperature, and a back pressure device (24) downstream the holding device (23) wherein the holding device (23) is a positive displacement holding device and / or a self cleaning holding device. The invention also relates to a method for heat treating a heat-sensitive fluid food product, such as whey protein concentrate, baby food and cheese milk, comprising the following steps: (a) supplying the food product to an inlet (21), (b) heat treating the food product by holding the food product for a specific time at a specific temperature in a holding device (23), (c) providing a back pressure device (24) downstream the holding device (23), and (d) discharging the heat treated food product through an outlet (22), wherein the back pressure device (24) is or comprises a cooled valve and / or the food product is positively displaced through the holding device (23).
Owner:SPX APV DANMARK

Lifting mechanism of intelligent 3D printer forming platform

The invention relates to the technical field of 3D printing, and discloses a lifting mechanism of an intelligent 3D printer forming platform. The lifting mechanism comprises a base plate, wherein theupper surface of the base plate is fixedly connected with the bottom ends of two sets of first supporting plates; a protective shell is arranged on the upper surface of the base plate; the first supporting plates are in sliding connection with the forming platform; and the base plate is fixedly connected with the bottom end of a telescopic rod. According to the lifting mechanism of the intelligent3D printer forming platform, a connecting shaft is driven to rotate through an arranged motor, so that a second bevel gear and a first bevel gear are matched to rotate, then the first bevel gear drives a transverse shaft to rotate, the transverse shaft drives a limiting block to rotate, the limiting block drives a gear to rotate, then the gear is matched with a moving rod, so that the moving rodis lifted under the limiting of a fixing column; and a scale plate is arranged to be matched with the first supporting plates, so that the forming platform can be stably lifted, meanwhile, the formingplatform is guaranteed to be in a horizontal state, and the height difference is prevented.
Owner:和氏璧(广州)科技有限公司
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