94results about How to "Shorten observation time" patented technology

The invention provides a navigation satellite autonomous time synchronization method based on synthetic aperture observation. The method comprises the following steps: all the cooperative observation satellites and a reference satellite perform timing observation on the same millisecond pulsar at the same time; the reference satellite completes time delay correction between each cooperative observation satellite and the reference satellite by the relative position measurement data between satellites at different times, and stacks each group of observation data completing the time delay correction to obtain the observation waveform of a synthetic aperture timing observation system; the clock error of an onboard clock of the reference satellite is measured; and the clock error between each satellite of a navigation constellation and a standard time TCB is measured and the clock error correction value is broadcast in the broadcast ephemeris of each satellite so as to complete the autonomous time synchronization of the navigation satellite. The method achieves the technical effects of reducing the X-ray detector load of the navigation satellite, shortening the observation time, and improving the autonomous time synchronization precision and real-time property of the navigation satellite.

The invention discloses a carrier phase ambiguity fixing method and device, and a satellite navigation receiver. The method comprises the following steps of: establishing an inter-receiver inter-satellite double-difference observation equation, wherein the unknown quantities of the inter-receiver inter-satellite double-difference observation equation include a single-frequency ambiguity and at least one wide-lane ambiguity; establishing a Kalman filtering observation model and a Kalman filtering dynamic model according to the inter-receiver inter-satellite double-difference observation equation; obtaining and solving multi-frequency-point real-time observation data according to a kalman filtering algorithm to obtain the floating point solutions of the wide-lane ambiguity and single-frequency ambiguity; subjecting the floating point solutions of wide-lane ambiguity and the single-frequency ambiguity to ambiguity of whole cycles fixing. The method and device can eliminate the influence of an ionosphere residual error, accurately and quickly solve the ambiguity, and thus guarantee positioning accuracy and shorten observation time.

An electron beam inspection device observes a sample by irradiating the sample set on a stage with electron beams and detecting the electron beams from the sample. The electron beam inspection device has one electron column which irradiates the sample with the electron beams, and detects the electron beams from the sample. In this one electron column, a plurality of electron beam irradiation detecting systems are formed which each form electron beam paths in which the electron beams with which the sample is irradiated and the electron beams from the sample pass. The electron beam inspection device inspects the sample by simultaneously using a plurality of electron beam irradiation detecting systems and simultaneously irradiating the sample with the plurality of electron beams.

The invention discloses an observation system of water injection in a fractured zone in a coal seam goaf, comprising a probe, an aeration control system and a water injection control system, wherein the probe comprises two aerating capsules, a water injection pipe installed between the two aerating capsules by connecting pieces, a gas pipeline and a water pipeline; the water injection pipe is provided with a plurality of water injection holes; the gas pipeline and the water pipeline are respectively distributed in the aerating capsules and the water injection pipe; water inlet holes are arranged on the part of the water pipeline in the water injection pipe; an aeration hole is arranged on the part of the gas pipeline in the aerating capsules; the aeration control system comprises a high pressure gas source and a main gas pipeline connected with the high pressure gas source and the gas pipeline; and the water injection control system comprises a high pressure water source and a main water pipeline connected with the high pressure water source and the water pipeline. The system improves the efficiency of the observation method of upward slant hole water injection by sections, can accurately measure the leakage flow of water in each section of the drilling hole and is simple in structure and convenient to use.

The invention discloses a precise search observation method for the form and the evolutionary process of cracks of a coal-mine roof. The precise search observation method comprises the following steps of: (1) using a geological drill to carry out roof drilling; (2) using a rock-stratum observation recorder to search a surface crack area; (3) using a double-end water plugging device to search deep cracks in the surface crack area; (4) analyzing data and determining the positions of the deep cracks; (5) installing a multi-point displacement meter on the positions of the deep cracks to observe crack evolution data; and (6) comprehensively analyzing data obtained by the double-end water plugging device, the rock-stratum observation recorder and the multi-point displacement meter, and then determining the distribution, the form and the evolutionary process of the cracks of the roof. The precise search observation method disclosed by the invention has the advantages that in the whole observation process, the observation cost is furthest saved, the positions of the cracks, the form of the cracks on the surface, the degree of the deep cracks and the complete data of the evolutionary process of the cracks are obtained, and the result is accurate.

The invention aims to solve the technical problem of providing an angle stepping rotary dividing method for carrying out non-along-track strip division on a region target so as to solve the problem of high cost of observing the region target in an initiative push-scanning imaging manner. The invention adopts the technical scheme that initial information is acquired; visibility calculation is carried out on an observed target; a datum division scheme is determined; and the angle stepping rotary dividing method is adopted to carry out screening of division schemes and feasibility verifying. The angle stepping rotary dividing method has the beneficial effects that by adopting the non-along-track strip dividing method, a division direction is optimized, and the number of strips for dividing the same region target is reduced, so that observing time is reduced; by adopting a strip overlapping ratio, an offset error caused by on-orbit satellite attitude control can be avoided; optimization is carried out by adopting an observing sequence next to reciprocating push-scanning, so that attitude maneuver time and an attitude maneuver amplitude among strips are reduced; optimization of the observing time reduces an attitude maneuver amplitude of the push-scanning process; feasibility testing on the observing scheme ensures feasibility of the observing scheme.

The invention discloses a method for directly determining the stand volume with a mobile phone, wherein the method comprises the following steps: determining the number and volume of trees in a forest stand per unit area by an angle gauge method; taking an ordinary mobile phone as a tool, setting angle gauge factors in mobile phone tree-measurement software; when certain angle gauge factor Fg is used, measuring around 360 degrees from sampling points, and observing heights of trunks above the ground, wherein the trunks are at places where the angle gauge notch is just tangent to the trunks above the breast height; the method for calculating the stand volume is as follows: the volume per hectare (M) is equal to the sum (in m) of heights of the trunks at all tangent places of each observed tree on the forest land above the ground multiplied by the angle gauge factor (referring to the Specification for the formula).

The special gamma spectrograph for moon exploration is provided with crystal scintillator connected to photomultiplier tube and data acquisition circuit successively and features that there are main detector and anticoincidence detector with scintillator connected to one other photomultiplier tube and that the photomultiplier tube of both the main detector and the anticoincidence detector are connected to the data acquisition circuit simultaneously. The data acquisition circuit has microprocessor. The novel gamma ray detection instrument has high sensitivity, low cost, optimal background radiation inhibiting effect and increased detector effective area. The optimal scheme has CsI (Ti) crystal in anticoincidence detector and crystal scintillator of several crystals adhered together.

The invention discloses a method for automatically scoring intestinal preparation after enteroscopy. Learning data sets in videos can be obtained in batches, the data sets are trained through a deep neural network model, intestinal foreign bodies are recognized, intestinal preparation conditions are recorded, the intestinal preparation conditions are scored through an ASTP scoring method and an EAREI scoring rule, and the quantitative scoring standard of intestinal preparation is defined.

The invention provides a method for estimating flow during a freezeup period of a cold region river through a stage-discharge relation during a flowing period. The method comprises the following steps that during the flowing period of the river, a target section is selected, and the stage-discharge relation of the target section during the flowing period is built; during the freezeup period of the river, measure points are arranged on the target section, and the average effective water depth of water flow under an ice sheet of the section is measured and determined; the average relative water depth lambda of the point with the maximum water flow flowing speed under the ice sheet away from a bed surface is measured, and r<m> is calculated and obtained through lambda; the water depth ratio (please see the formula in the specification) of an ice sheet layer and a bed surface layer is calculated; and the convert coefficient of the flow during the freezeup period is calculated through the stage-discharge relation during the flowing period, K=(1+alpha<3/2>/r<m>)/(1+alpha)<5/3>, and the flow of the target section during the freezeup period of the river is obtained. According to the method, the advantage that hydrologic survey is convenient during the flowing period is fully utilized, through relatively simple measurement, the K value of the convert coefficient is determined, and the fitted stage-discharge relation during the flowing period is used for estimating the flow during the freezeup period of the cold region river; and compared with a traditional method, the workload of field observation is greatly reduced, and a large quantity of manpower and material resources can be saved.

The invention provides a cooking device control method and device, a cooking device and a storage medium. The method comprises the steps of: obtaining image information of food materials; identifyingthe image information, and determining category information and volume information of the food materials; and determining the maturity corresponding to the food materials according to the category information and the volume information. The control method provided by the invention comprises the steps of: identifying the image information to obtain the volume information and the category information of the food materials, calculating the volume variation of the food materials in the cooking process by utilizing the initial volume and the current volume of the food materials; and according to the volume change amount of the food materials, determining the maturity corresponding to the food materials in a pre-trained maturity model. According to the invention, the volume change of the food materials can be monitored in real time, the automatic maturity identification function is achieved by utilizing the volume change amount, the observation time of a user is greatly saved, and the accuracy is higher compared with a scheme of determining the food maturity only by depending on surface states such as colors in the prior art.

The present invention discloses a parameter extraction method for a precession target structure. The method is characterized by comprising the steps of respectively acquiring the target radial length information of two radars based on the target one-dimensional range profiles of the two radars; according to the target radial length information, calculating the target radial length curves of the two radars; according to the target radial length curves of the two radars, calculating the target precession angles and the precession axis aspect angle difference of the two radars; according to the target precession angles, the precession axis aspect angle difference of the two radars and the target radial length curves of the two radars; calculating a target length and a target bottom-surface radius. Compared with the prior art, the structure parameters and the precession angles of cooperative targets and non-cooperative targets can be extracted at a relatively accuracy error. Meanwhile, the observation time required for extracting precession characteristics is greatly shortened.

The invention provides a control method, a cooking utensil, a server and a readable storage medium. The control method comprises the following steps: determining category information and weight information of food materials according to food material images of the food materials in the cooking utensil; and determining cooking parameters corresponding to the food materials according to the categoryinformation and the weight information, and controlling the cooking utensil to work. Therefore, the cooking parameters suitable for the food materials can be automatically matched, intelligent full-automatic cooking is achieved while the optimal cooking effect is guaranteed, and convenience of the cooking utensil is improved; a weight sensor does not need to be arranged, the weight of the food materials can be independently obtained, errors caused by a container containing the food materials to weight detection are avoided, the structure of the cooking utensil can be simplified, the manufacturing cost is reduced, and miniaturization of the cooking utensil is facilitated.

The invention discloses an unmanned aerial vehicle remote sensing networking redundancy fault-tolerant control method. The method comprises the following steps that 1) an unmanned aerial vehicle flight control ground station obtains real-time latitude and longitude coordinates and height information of flight of each unmanned aerial vehicle in an unmanned aerial vehicle remote sensing network, wherein the unmanned aerial vehicle remote sensing network comprises a pilot unmanned aerial vehicle, N following unmanned aerial vehicles and M following redundant unmanned aerial vehicles, and the pilot unmanned aerial vehicle and the N following unmanned aerial vehicles serve as observation unmanned aerial vehicles; 2) the distance between the observation unmanned aerial vehicles is calculated through the collected latitude and longitude and height information, and if the distance between one observation unmanned aerial vehicle A and one or more adjacent observation unmanned aerial vehicles exceeds a set expected distance, it is judged that the observation unmanned aerial vehicle A has a fault; and 3) a faulted observation unmanned aerial vehicle A is separated from the unmanned aerial vehicle remote sensing network, a following redundant unmanned aerial vehicle a is started to replace the observation unmanned aerial vehicle A, and then the position, the navigational speed and the course of the observation unmanned aerial vehicle A are controlled.

The invention discloses a fill valley foundation settlement inversion method based on a centrifugal model test. The method comprises the steps of 1, obtaining solid fill engineering profile parameters; 2, manufacturing a model box, and carrying out a centrifugal model test on the model box to obtain model filling settlement data; 3, manufacturing a rigid valley foundation model box, and carrying out a centrifugal model test on the rigid valley foundation model box to obtain model filling settlement data; 4, manufacturing a flexible valley foundation model box, and carrying out a centrifugal model test on the flexible valley foundation model box to obtain model filling settlement data; and 5, carrying out settlement inversion on the original valley foundation of the fill project. Accordingto the method, the long-term deformation of the original valley and the later-period filling soil can be visually displayed in a short time, the model boundary condition is clear, the inversion idea is concise, the additional settlement interval value of the original valley foundation of the fill engineering under the action of the overlying filling soil load can be rapidly obtained, and the method can be used as an auxiliary means for fill engineering design and engineering settlement prediction.

The invention relates to a visual observation culture medium for nematode acute toxicity test and a preparation method of the visual observation culture medium for the nematode acute toxicity test and aims to solve the problem that an existing culture medium for the nematode acute toxicity test is inaccurate in counting, large in death judgment error, long in observation time and inaccurate in behavior observation. The visual observation culture medium comprises, by mass percentage, 45-60% of gypsum, 5-10% of activated carbon and the balance of distilled water. The preparation method includes uniformly mixing the gypsum with the activated carbon to pour into the distilled water, uniformly stirring to obtain mixture; pouring the mixture into a twelve-hole cell culture plate 0.1-0.2 centimeter in thickness; and standing on a horizontal platform till solidifying and obtaining the visual observation culture medium for the nematode acute toxicity test. The visual observation culture medium is easy to count, obvious in dead nematode judgment, easy for behavior observation and higher in test result correctness and accuracy, and can be applied to the nematode toxicity test.

The invention relates to an automobile door opening anti-collision intelligent warning system, a method and equipment and a storage medium. The automobile door opening anti-collision intelligent warning system is composed of external cameras, distance sensors, an automobile ECU, an automobile door motor, an indicator lamp switch and an indicator lamp. The external cameras are installed on the upper right portion of a left view mirror and the upper left portion of a right view mirror respectively, and the distance sensors are installed in the centers of the front hubs and the rear hubs respectively. The indicator lamp switch is installed beside the steering wheel and connected with a left indicator lamp and a right indicator lamp which can emit red light. When the automobile is parked beside, videos acquired by the external cameras are automatically transmitted to a single-chip microcomputer of the automobile ECU, and whether a dangerous situation exists behind or not is judged throughcalculation. And if the dangerous situation exists behind, an instruction is sent out to enable the vehicle door motor to work to lock the vehicle door. According to the system, the observation time of a driver or passengers is saved, and collision accidents can be effectively prevented.

The invention belongs to the technical field of experimental devices, and discloses a device and a method for measuring uranium migration in small column simulated soil. The device for measuring uranium migration in small column simulated soil is provided with a simulated soil gas heating unit, a gas circulating pump and one or more simulated soil medium units; the simulated soil gas heating unitis provided with a PVC pipe, a disturbance fan is installed in the PVC pipe, an upper pipe cover is installed at the upper end of the PVC pipe in a buckled mode, a lower pipe cover is installed at thelower end of the PVC pipe in a buckled mode, and an electric heating wire is installed in the lower pipe cover; and the soil medium simulation unit is provided with a PVC pipe, the PVC pipe is filledwith a uniform rock-soil medium, the bottom end of the rock-soil medium is filled with a uranium-containing base material, the upper end of the rock-soil medium is provided with an upper pipe cover in a buckled mode, and the lower end of the rock-soil medium is provided with a lower pipe cover in a buckled mode. When the device is used, the uranium element can penetrate through the rock-soil medium in the model, so that the observable uranium content is formed in the sampling gas in the PVC pipe at the upper end of the rock-soil medium, and the original observation time is greatly shortened.

The invention relates to a foundation ditch springback observation mark convenient for layered observation and an observation method. The observation mark comprises a base, an observation rod arranged on the base and an observation buoy, and the observation buoy is arranged at the top end of the observation rod; the observation rod comprises a plurality of observation units which are connected end to end in sequence, and each observation unit comprises a connecting rod and a protection sleeve, which are sleeved at inside and outside; a horizontal fine tuning device and a circular level are arranged on the observation rod. By means of the observation mark, foundation ditch springback is observed and calculated by means of a simultaneous back and forth observation method, compared with a traditional method, the observation method provided by the invention has the advantages that layered observation and real-time observation can be achieved, the deformation observation speed of a foundation ditch springback point can be accelerated to save the observation time and manpower and material resources, the deformation observation precision is enhanced, the calculation precision of the foundation ditch springback observation quantity is correspondingly improved, the action is obvious and the effect is remarkable.

The invention discloses a double-person reading method for improving the accuracy of leveling measurement, which comprises the following steps of: selecting a surveyor, a leveling rod, a rod support and a leveling instrument; laying a branch leveling line; setting a back-sight rod, a leveling instrument and a foresight rod; reading a reading on the back-sight rod by the surveyor, reading the reading again by a recorder, checking whether the readings of the surveyor and the recorder have an error, if so, re-observing the back-sight rod until no error exists, and then recording the reading by the recorder; rotating the leveling instrument to aim at the foresight rod by the observer, reading a reading on the foresight rod by the observer, then reading the reading by the recorder, checking whether the readings of the observer and the recorder have an error, if so, re-observing the foresight rod until no error exists, then recording the reading in a short-hand note by the recorder, and calculating the height difference between the reading of the back-sight rod and the reading of the foresight rod; moving the leveling instrument to a second observation station, and repeating the steps 3)-5) so as to perform the operation of the second observation station, and sequentially carrying out observation along the branch leveling line until a target leveling point is observed; and calculating a height difference delta h and the algebraic sum sigma delta h of all the observation stations, and judging the relative heights of a known elevation leveling point A and an unknown elevation leveling point B. According to the invention, the labor intensity of the measuring personnel is reduced, and the speed of the project progress is improved.