47results about How to "Continuity" patented technology

The invention discloses an unmanned aerial vehicle signal detection and identification method based on spectrum feature enhancement. The method comprises the following steps: firstly, carrying out time-frequency transformation on a received signal to obtain an original time-frequency graph; performing learning enhancement on the degenerated time-frequency graph by adopting a coding-decoding type deep neural network, and realizing noise suppression and structure recovery by combining pixel reconstruction, structural similarity and a texture perception loss function; and finally, performing target area detection and positioning on the enhanced time-frequency graph, directly outputting a structured result containing a time-frequency range, a category and confidence, and completing conversion from a frequency spectrum to a linkable engineering target. According to the unmanned aerial vehicle signal detection and recognition method based on spectrum feature enhancement, a spectrum feature enhancement mechanism is introduced before traditional spectrum analysis and feature recognition processing, and region-level detection and judgment are executed under the enhanced spectrum constraint condition; reliable discovery, positioning and identification of an unmanned aerial vehicle control link and an image transmission link in a complex electromagnetic environment are realized.

This invention relates to an underwater pipeline flaw detection robot, belonging to the field of underwater pipeline inspection technology. The invention comprises a main ring, a cleaning mechanism, a spring telescopic lever, a moving mechanism, a second spring, a drive mechanism, and a monitoring probe. A receiving groove is formed on the inner wall of the main ring. The cleaning mechanism is slidably connected to the receiving groove. The two ends of the spring telescopic lever are hinged to the cleaning mechanism and the moving mechanism, respectively. The spring telescopic lever is rotatably connected to the side wall of the receiving groove. The moving mechanism is slidably connected to the side wall of the receiving groove. The two ends of the second spring are fixedly connected to the moving mechanism and the side wall of the receiving groove, respectively. The drive mechanism is fixedly installed on the outer wall of the main ring, and the monitoring probe is fixedly installed on the top surface of the main ring. This invention allows the robot to be fitted onto the pipeline, improving its stability in water. The cleaning mechanism cleans the deposits on the pipeline, improving the flaw detection effect. The moving mechanism allows the robot to move in water while traversing flanges, enabling the robot to successfully complete flaw detection work.

The utility model relates to the technical field of straw cutting-off, in particular to an agricultural harvesting straw cutting-off machine which comprises a cutting-off box. The device further comprises a hole plate and a crushing roller, a cutting-off box is fixedly connected, a cutting-off roller is rotationally connected into the cutting-off box, and a long blade is fixedly connected to the outer side of the cutting-off roller through a fixing block. Through the use of the long blade and the crushing roller, the controller controls the cutting air cylinder to drive the cutter to primarily cut moving straw, the cutting length can be flexibly adjusted, the single cutting load is reduced, the abrasion to the cutter is reduced, the primarily cut straw falls into the cutting box, the cutting roller rotates to drive the long blade to rotate, and the straw can be cut into the straw. The two crushing rollers rotate relatively, the straw is uniformly crushed into fine particles, the overall treatment efficiency of the straw is improved through three-stage cutting, the diversified market requirements are met, and the production efficiency is improved.

The invention relates to the technical field of ultrasonic image analysis, and discloses an image detection method and system for prolonging the second birth process of double-fetal vaginal delivery and SPPH risk based on ultrasonic Speckle-tracing, and the method comprises the steps: obtaining an ultrasonic two-dimensional gray-scale image sequence; marking a conjoint analysis area between the cervical wall and the front and rear walls of the vagina; constructing a joint area displacement field; constructing a joint region strain trajectory; extracting parturition process characteristic indexes; and executing risk assessment through a fuzzy rule. The technical problem that in the prior art, risk judgment depends on clinical experience, and especially under the condition that continuous stretching occurs on the cervix uteri and vagina combined wall in the second birth process of double-fetal vaginal delivery, early recognition of the evolution process of the tissue from reversible stretching to irreversible instability is difficult to achieve is solved. Due to the fact that joint area displacement field modeling and logarithmic nonlinear strain analysis are introduced, quantitative characterization and continuous risk description of the mechanical behavior of the tissue in the labor process are achieved.

The application discloses a kind of coronary angiography three-dimensional reconstruction method and system, it is related to medical image processing technical field, including: obtaining multi-angle coronary DSA angiography projection image and executing pre-processing, extract blood vessel initial center line and both sides initial contour, calculate each section contrast agent relative concentration, combined with blood vessel local curvature, concentration difference sign change and anatomical feature adaptive segmentation blood vessel section, filter reliable reference side and generate mirror virtual contour, calculate three kinds of contour deviation, construct multi-constraint objective function and correct center line section by section, integrate corrected center line and fit lumen parameter, solve blood vessel feature point three-dimensional coordinate and complete three-dimensional reconstruction.The application has the advantages that: effectively suppress the center line deviation caused by contrast agent concentration uneven, consider correction accuracy and blood vessel form continuity, the size of three-dimensional model output is accurate, topological correct, can be directly used for clinical quantitative diagnosis and interventional operation planning.

The application provides an energy-saving method and device, a terminal, network equipment, a chip and a storage medium, and relates to the field of communication. The method comprises the following steps: in response to the number of time units in which the terminal has not been continuously scheduled by a physical downlink shared channel (PDSCH) reaching a threshold, the terminal is controlled to operate in an energy-saving mode. Thus, the number of time units in which the terminal has not been continuously scheduled by a PDSCH is monitored, and when the number of time units reaches the threshold, the terminal is automatically triggered to operate in the energy-saving mode, thereby realizing an implicit energy-saving mechanism without the need for the network equipment to send explicit signaling. The additional control overhead and response delay caused by the transmission and analysis of the explicit signaling are effectively avoided, the energy-saving operation can be started immediately after the terminal actually enters an idle state, the invalid energy consumption caused by the terminal continuously monitoring a downlink control channel during the waiting period for the signaling is avoided, and the power consumption of the terminal is significantly reduced and the endurance time is prolonged.

The application discloses a water stop construction method, which can improve the continuity and strength of concrete at a water stop ridge, prevent the concrete at the water stop ridge from cracking, improve the waterproof effect at the water stop ridge and construction efficiency; the water stop construction method comprises the following steps: constructing a water stop steel plate on a structural layer; constructing an arc-shaped part on both sides of the water stop steel plate, the arc-shaped part is concave in an arc shape, and the arc-shaped part is located at a corner part of the structural layer and the water stop steel plate; constructing a waterproof layer on the surface of the structural layer, the surface of the arc-shaped part and the surface of the water stop steel plate; constructing a leveling layer on both sides of the water stop steel plate; and constructing a bonding layer on the top surface of the leveling layer, and constructing a plate layer on the top surface of the bonding layer.

This invention discloses a method for predicting the solubility of elemental sulfur, comprising the following steps: obtaining parameter information of the target gas and calculating the target gas density ρ; selecting a prediction model based on the target gas temperature T, and determining the model parameters based on the H2S mole fraction and the target gas density ρ: when 373.15K≤T≤433.15K, the prediction model is c=ρ k exp(a / T+b); When 303.15K≤T<373.15K, the prediction model is: where c is the solubility of elemental sulfur in the target gas, k, a, and b are model parameters, model parameter k is a function of T, and the low-temperature correction coefficient d; Based on the selected prediction model and the determined model parameters, the solubility of elemental sulfur in the target gas is calculated. This invention also discloses an elemental sulfur solubility prediction system, electronic equipment, and storage medium. The elemental sulfur solubility prediction method of this invention is applicable to the temperature span in the development process of acidic gas reservoirs, introducing a low-temperature coefficient in the low-temperature range to ensure prediction accuracy throughout the entire temperature range.

This application relates to the field of power trading technology, and provides an AI-based method and system for optimizing power trading decision-making strategies. After obtaining the electricity price sequence for the first day, a second day's electricity price sequence is obtained by performing time-series correlation prediction based on the first day's electricity price sequence and historical electricity price data. Candidate strategies are generated using mixed-integer linear programming based on the physical parameter set of the energy storage power station and the second day's electricity price sequence, employing both profit maximization and discharge maximization strategies. Profit statistics are performed on each objective priority strategy based on the first day's electricity price sequence and historical electricity price data to evaluate the historical profit win rate of each objective priority strategy. The optimal charging and discharging strategy is then selected from the candidate strategies based on the historical profit win rate. This application, through day-ahead electricity price prediction and charging and discharging constraint programming, ranks and filters candidate strategies based on historical profit win rates to obtain the optimal charging and discharging strategy that balances electricity price fluctuations and equipment constraints.

The application relates to the technical field of video monitoring, and particularly discloses a video monitoring system for guaranteeing construction process safety, which comprises the following modules: a video recognition module: surface mark points and edge contours are acquired based on multi-angle video streams; a deviation acquisition module: local geometric deviations are acquired according to the surface mark points and the edge contours; a load acquisition module: a load spectrum is extracted based on environmental event records; a simulation module: time-domain dynamic response simulation is carried out based on the local geometric deviations and the load spectrum, and a contact stress time sequence curve is obtained; an analysis module: evolution characteristics of the contact stress time sequence curve are analyzed, and a contact stress peak value space distribution thermal diagram and a peak value reappearance interval sequence are generated; and an output module: a contact stress potential distribution diagram is acquired, and the contact stress potential distribution diagram identifies component connection parts with repeatedly appearing high stress. The application can reduce the possibility of safety problems caused by abnormal stress of components in the construction process.

The invention discloses a solid adsorption cycle carbon capture device and method, the device performs carbon capture through an alkali metal-based solid absorbent, and the device at least comprises: a fluidized adsorption reactor which is used as an adsorption reaction zone and has an adsorption bed layer at the bottom, and performs a fluidized adsorption reaction through carbon-containing gas introduced from the bottom of the adsorption bed layer; the lifting pipe is arranged in the fluidized adsorption reactor and serves as a hydration reaction zone; the upper end of the lifting pipe is higher than the adsorption bed layer, and the lower end of the lifting pipe penetrates out of the fluidized adsorption reactor and mixed gas of air and water vapor is introduced as fluidizing air for hydration reaction; and the regeneration unit is connected between the fluidized adsorption reactor and the riser and is used for carrying out regeneration treatment on the adsorbent particles subjected to carbon capture and recycling the adsorbent particles. According to the invention, the riser is arranged in the fluidized reactor, so that the performance of the adsorbent can be exerted to the maximum extent, and the treatment efficiency of carbon capture and efficient utilization of energy are effectively improved; the hydration reaction and the adsorption reaction can be respectively subjected to process strengthening, so that the efficiency of the hydration reaction and the adsorption reaction is effectively improved.

This invention belongs to the field of robot safety control technology and discloses a method for safe motion planning of a dual-redundant robotic arm. A linear mapping relationship is established between the joint spatial velocities of the redundant robotic arm and the velocity of the end effector. End effector velocity constraints, safety distance constraints, and joint amplitude constraints are established, and a multi-objective joint constraint model is established by integrating a differential kinematics model with the three types of constraints. The optimal decision variables satisfy the Cartesian-Kuhn-Tucker conditions. The original expression of the Cartesian-Kuhn-Tucker conditions is clarified, and a nonlinear complementary function is introduced to reconstruct the Cartesian-Kuhn-Tucker conditions. Based on the improved Cartesian-Kuhn-Tucker conditions, a vector error function is defined, and an adaptive zeroing neural network is designed. The vector error function is iteratively solved using the adaptive zeroing neural network to obtain the optimal decision variables of the multi-objective joint constraint model. The optimal decision variables are then used as the joint motion control commands for the robotic arm and output, completing the robotic arm motion planning.

The utility model relates to a ceramsite proppant semi-finished product drying device which comprises a shell, the upper end of the shell is communicated with a discharging hopper, the lower end of the shell is provided with a discharging door, the ceramsite proppant semi-finished product drying device further comprises drying pieces and a push plate, the drying pieces are symmetrically arranged in the front portion and the rear portion of the shell, the drying piece on the rear portion comprises an arc plate and a connecting plate, and the arc plate protrudes backwards. The left ends of the arc plates are connected with a left side plate of the shell, the upper ends and the lower ends of the arc surfaces of the front sides of the arc plates are connected through connecting plates, air holes are evenly distributed in the connecting plates, the left ends and the right ends of cavities between the connecting plates and the arc plates are sealed through sealing plates, and the shell is provided with an air heater used for introducing hot air into the cavities between the connecting plates and the arc plates. A plurality of push plates are rotationally arranged in the shell on the outer sides of the arc plates of the two drying pieces, and the width of each push plate corresponds to the distance between the rear arc plate and the shell. According to the utility model, the problem that the ceramsite proppant semi-finished product is difficult to continuously and comprehensively contact with hot air when being dried is solved.

The invention relates to the field of geotechnical engineering in-situ investigation, in particular to a CPTU test device capable of simultaneously measuring vertical and transverse soil parameters and a control method.The CPTU test device comprises a metal shell, a sealing top cover is arranged at the upper end of the metal shell, a watertight connector is arranged on the sealing top cover, and the watertight connector is connected with an external probe rod; a water permeable stone is arranged at the lower end of the metal shell, a conical tip probe is arranged below the water permeable stone, a transverse probe hole is formed in the metal shell, and a power source, a controller, an inertial sensor, a side friction resistance sensor, a small transverse CPTU, a flexible silicon rubber sleeve, a waterproof clamp, a conical tip resistance sensor and a pore pressure sensor are arranged in the metal shell from top to bottom. According to the scheme, under the condition that one set of equipment is used, vertical and transverse (horizontal) soil body strength tests are carried out at the same time, and the anisotropy condition of the soil body is accurately revealed while the cost is saved.

The invention discloses a thermal runaway cooperative smoke exhaust and pressure balance control method and system for a machine room microenvironment, and belongs to the technical field of machine room environment control. According to the method, the internal pressure, the external pressure, the smoke concentration and the temperature of a machine room are monitored in real time through multiple sensors, the fire development stage is recognized, and the control weight is dynamically adjusted according to the stage, specifically, smoke is discharged preferentially in the smoldering stage, pressure maintaining is preferentially performed in the open fire stage, and gas replacement is preferentially performed in the later fire extinguishing stage. In the smoke exhaust process, the top smoke exhaust valve, the under-floor smoke exhaust valve and the two-way pressure balance valve are cooperatively adjusted according to the real-time pressure difference, and the internal pressure is maintained within the safety range. Under extreme negative pressure, the space under the floor is utilized to generate air pressure pulse to assist smoke discharge, and introduction of external air is reduced; meanwhile, a precise air conditioner and a cabinet fan are linked through a communication interface, and heat dissipation of survival equipment is guaranteed. According to the method, multi-target cooperation of smoke exhaust, pressure maintaining and service continuity is realized, and the safety and the recovery capability of the machine room in a thermal runaway scene are remarkably improved.

The application provides an online method and system of a terminal and a computer readable medium. The method comprises the following steps: obtaining the current latest terminal information matching table through a factory base station; polling the terminal which has not entered the factory and is online in the latest terminal information matching table according to a polling period; sending a call package to the polled terminal; updating the state of the polled terminal in the terminal information matching table to the state of having entered the factory and being online if the response package replied by the polled terminal is received within a preset time length; and broadcasting the updated terminal information matching table to the base station accessing the factory network through the factory network, so that the positioning base station updates the factory terminal dynamic list according to the updated terminal information matching table, and communicates with the terminal which has entered the factory and is online in the factory terminal dynamic list according to the polling period, thereby reducing the call time consumption of the terminal which has not entered the factory and is online, and shortening the polling period of the positioning base station.

The present invention relates to a differential pair noise suppression structure. A circuit board includes at least one substrate having opposite first and second surfaces. A pair of plated vias are disposed along a z-axis. The first surface of the substrate is provided with a first metal line, a second metal line, a first plated via opening, and a second plated via opening to form a differential pair circuit structure. A metal ground is provided on the second surface of the substrate, the metal ground having a blank area. From a projection perspective, the metal ground area encompasses both signal lines to eliminate reflection noise caused by a boundary between the blank area and the metal ground so that the differential pair signal lines have a uniform characteristic impedance.

The invention provides a display panel and a preparation method thereof, a display panel mother board and a display device.The preparation method of the display panel comprises the steps that a substrate is provided, the substrate comprises a display area and a non-display area located on the periphery of the display area, and the non-display area comprises a binding area provided with a bonding pad; forming an isolation material layer including a conductive material on the substrate; patterning the isolation material layer to form a plurality of isolation openings located in the display area and a first protection structure located in the non-display area, the first protection structure defining at least one first opening located at the bonding pad of the binding area, the orthographic projection of the end, away from the substrate, of the first protection structure on the substrate is within the orthographic projection range of the end, close to the substrate, of the first protection structure on the substrate; and forming a light-emitting material layer and a packaging material layer on the substrate, and patterning the light-emitting material layer and the packaging material layer to obtain a light-emitting unit and a first packaging layer which are at least partially located in the isolation opening. The preparation method is beneficial to improving the reliability of the display panel.

This invention belongs to the field of firefighting equipment, specifically referring to a high-temperature resistant and flame-retardant fire protective goggles. It includes a main body of the goggles, a frame on which lenses are fitted inside the frame, and buckles on both sides of the frame connected to adjustment straps. The frame is made of flame-retardant and high-temperature resistant TPV composite material, combined with high-temperature resistant and flame-retardant foam, reinforced with heat-resistant polycarbonate lenses, a flame-retardant headband, and buckles. This fully utilizes the core advantages of the overall material—wear resistance, high-temperature resistance, and flame retardancy—allowing the goggles to remain stable in high-temperature environments and continuously provide eye protection. The fire protective goggles of this invention can work stably for more than 5 minutes in a 176.7°C environment without deformation, melting, or breakage, and do not support combustion when exposed to open flames. This effectively solves the problem of traditional goggles easily failing at high temperatures, providing firefighters with a high-temperature resistant and flame-retardant protective barrier that is both protective and adaptable to the complex and harsh working environment of fire scenes.

This invention provides a risk-aware-based in-vehicle interactive safety arbitration method and apparatus. The method includes: acquiring vehicle dynamic data, environmental perception data, and driver state data in real time, and calculating a real-time driving risk level based on the data; when the driving risk level reaches a preset high-risk level, capturing and storing the interaction state of the current foreground focus application; performing a forced suppression operation on the display interface of the foreground focus application, while simultaneously controlling the safety information display interface to be displayed with the highest priority in the foreground; when the driving risk level decreases to a preset recovery condition, providing an entry point for triggering recovery; and responding to a recovery command triggered through the entry point, restoring the interface and internal business state of the foreground focus application to the state at the time of interruption based on the stored interaction state. This invention improves the overall safety and user experience of the intelligent cockpit system.

The utility model discloses an anti-pollution tunnel safety light reflecting device which comprises a first light reflecting piece, an iron piece, a pollutant adsorption piece, a second light reflecting piece, a water-soluble glue layer, a third light reflecting piece, a magnet piece, a base and a fixing rod. The first reflector is fixedly connected with the iron sheet; the lower end of the iron sheet is fixedly connected with the upper end of the pollutant adsorption sheet; the pollutant adsorption sheet is used for adhering pollutants; the second reflector and the third reflector are connected through a water-soluble glue layer, a magnet sheet is arranged between the third reflector and the base, and the magnet sheet is fixedly connected with the base; one end of the fixing rod is fixedly connected with the base; the iron sheet is adsorbed on one side of the second reflector through the magnetic force of the magnet sheet; the fixing rods are used for being fixedly connected with corresponding monitoring points. According to the utility model, the purpose of continuous observation after the reflection device is polluted can be realized; according to the utility model, the workload of re-distribution after the conventional observation device is polluted is reduced; according to the utility model, continuous observation at the original position can be realized, and data continuity is realized.

The application discloses a multi-strategy unmanned aerial vehicle rapid obstacle avoidance path planning method based on dynamic ellipsoid sampling, which comprises the following steps: constructing an ellipsoid according to the starting point and the ending point of the unmanned aerial vehicle path planning, mapping a sampling point to the ellipsoid space to obtain a sampling point in the ellipsoid, and dynamically adjusting ellipsoid parameters through cyclic sampling to obtain an initial planning path and path nodes, which can focus on an effective area and improve sampling efficiency; a multi-strategy expansion mechanism is used to optimize the initial planning path nodes, and the convergence speed and obstacle avoidance ability are improved; potential parent nodes meeting the feasibility condition are searched in the neighborhood of the optimized path nodes, and the node with the minimum path cost is selected as a new parent node, and the new parent node is used to update the optimized planning path; a three-stage path smoothing strategy is used to smooth the updated optimized planning path, and an unmanned aerial vehicle planning path is obtained, so that the path feasibility and safety are ensured, and the path smoothness is improved.

The utility model particularly discloses a subcritical waterless deoiling and decoloring machine which comprises a cleaning box and a drying box, the cleaning box is communicated with the drying box, the cleaning box and the drying box are both in a micro-negative pressure state, and when the machine works, grey cloth passes through the cleaning box and the drying box in sequence by winding a cloth guide roller; wherein a spraying mechanism is arranged in the cleaning box, and the spraying mechanism is used for spraying subcritical fluid to the part, located in the cleaning box, of the gray fabric or the dyed fabric; a drying mechanism is arranged in the drying box and used for baking the part, located in the drying box, of the gray fabric. Lubricating oil or flooding in the fabric is extracted out through subcritical fluid at low temperature, water cleaning is replaced, energy is saved, emission is reduced, and the device is more environmentally friendly; and continuous feeding and continuous discharging are achieved, and the production efficiency is greatly improved.

This invention proposes a conference room audio and video control method based on artificial intelligence and audio-visual linkage orchestration. To solve the problems of misjudgment during speaker switching, audio-visual asynchrony, and unstable cross-device collaboration in existing methods, the method proposes: acquiring the node capabilities of cameras, microphones, and displays, as well as the spatial status of participants, and establishing a unified time base and audio-visual linkage channel; generating candidate speaker objects and event markers based on aligned session events; constructing a semantic model containing rhythmic preamble, momentum judgment, and displacement memory, and outputting control signals, executable windows, and pre-configured amplitudes; and integrating camera pre-positioning trajectories, microphone secondary acquisition channels, display layout, and takeover order within the executable window, calculating rhythm alignment points, and forming a switching execution list to drive the linkage of camera PTZ, microphone, and display. This method ensures audibility and smooth switching during transitions and is suitable for audio-visual acquisition and display linkage scenarios with multiple participants.

The invention relates to the technical field of photon sounding, and discloses a point cloud denoising clustering method and device based on an intensity aggregation profile, and the method comprises the steps: constructing a noise region photon distribution model and a signal interface photon distribution model; defining uniform intensity, Gaussian intensity, Gaussian concentration intensity and linear concentration intensity of photons; respectively deducing a distribution function of each photon distribution model under each intensity; performing convolution operation on the original point cloud image by using the convolution kernel of each intensity to obtain a Gaussian intensity graph, a Gaussian concentrated intensity graph and a linear concentrated intensity graph; acquiring the position of an interface field by using a Gaussian concentrated intensity graph, distinguishing seabed and sea surface signals according to the Gaussian intensity graph, and supplementing the terrain with the seabed signal loss of a part of sections by using a linear concentrated intensity graph; and fitting the Gaussian intensity graph according to the positions of seabed and sea surface interface fields, and carrying out reverse deduction to obtain parameters of each distribution model. Therefore, the automation process and precision of the flow of automatically identifying the submarine topography and the sea surface shape are improved.

The application relates to the technical field of organic synthesis, in particular to a preparation method of C9H 12 O. The method is to use phenol and isopropyl alcohol as reaction raw materials, then heat under a protective atmosphere, and make the mixed reaction liquid pass through the surface of a catalyst to complete the reaction and obtain C9H 12 O. In the process, when the catalyst is a phosphate catalyst, isopropyl phenol is mainly synthesized; when the catalyst is an Al-P-O catalyst, ortho-isopropyl phenol and para-isopropyl phenol are mainly synthesized. The reaction has low preparation cost, is not easy to produce harmful substances, is an environmentally-friendly reaction path, and realizes green environmental protection and low cost of C9H 12 O production.

The utility model relates to the technical field of fertilizer production, and provides a coconut shell crushing and soaking all-in-one machine which comprises a conveying box and a crushing box, a crushing mechanism is arranged in the crushing box, a conveying mechanism is arranged in the conveying box, a soaking mechanism is arranged in the conveying box, the crushing box is communicated with the conveying box, and the crushing box is communicated with the conveying box. The crushing mechanism comprises connecting bearings rotationally connected to the two sides of the crushing box, a rotating shaft is fixedly connected between the connecting bearings, and the periphery of the rotating shaft is fixedly sleeved with a crushing roller; the conveying mechanism comprises a spiral conveying rod rotationally connected to the interior of the conveying box. According to the utility model, coconut shells can be conveyed into the conveying box after being crushed, and can be directly soaked after being crushed in cooperation with the soaking mechanism, so that the crushing and soaking operation has continuity, and the device has the functions of being good in soaking effect, small in occupied area, and capable of reducing the pre-production steps of machine-made fertilizers and improving the production efficiency of matrix fertilizers.

The invention discloses a crop remote sensing sample automatic construction method based on time-space-spectrum combined characteristics. The method comprises the following steps: acquiring multi-period optical remote sensing images of a target year in a research area; traversing unmarked cultivated land pixels in the research area, and calculating the similarity between the time sequence feature, the spectral feature and the spatial feature of each cultivated land pixel and the corresponding crop type feature signature library in the time sequence dimension, the spectral dimension and the spatial dimension; and performing spatial connectivity verification on the candidate amplified sample points by judging the comprehensive similarity, and combining the final amplified sample points with the core sample library to form a massive enhanced sample library. Through a step-by-step filtering mechanism of time sequence consistency screening, spectrum consistency screening, space purity screening and neighborhood verification, multi-source feature information of a time dimension, a spectrum dimension and a space dimension is fused, and a high-purity core sample library is constructed.

The application discloses a fundamental wave phase difference determination method and device. The method comprises the following steps: obtaining single-phase periodic alternating current signal sampling values output by an electromagnetic transient simulation model at adjacent sampling moments; determining signal characteristic quantities of a midpoint moment of a sampling interval formed by the adjacent sampling moments according to the single-phase periodic alternating current signal sampling values; generating a reference parameter according to the midpoint moment and a rated frequency of the electromagnetic transient simulation model; performing orthogonal transformation on the signal characteristic quantities and the reference parameter to obtain orthogonal signal quantities; and solving the orthogonal signal quantities to obtain a fundamental wave phase difference of the single-phase periodic alternating current signal. The application eliminates phase deviation caused by sampling endpoint time sequence misplacement by constructing a midpoint time sequence reference depending on adjacent sampling points; avoids voltage fluctuation interference by decoupling amplitude and phase information in layers; and realizes uninterrupted phase output in combination with four-quadrant inverse tangent, thereby greatly improving real-time measurement and calculation capability in a microsecond-level iteration scene of electromagnetic transient.

The application discloses a smart bus operation and maintenance task scheduling method based on an edge intelligent prediction model, belongs to the field of vehicle operation and maintenance scheduling, and comprises the following steps: performing segment division on a continuous sampling sequence according to a preset time window, extracting derived characteristic parameters used for operation and maintenance risk discrimination and prediction inference in each segment, and encapsulating the derived characteristic parameters and data quality information corresponding to the derived characteristic parameters to generate a characteristic certificate; performing comparable correction on the derived characteristic parameters based on the data quality information in the characteristic certificate; obtaining a certificate-driven operation and maintenance risk judgment result based on a derived characteristic drift index; generating a model input sequence and inputting the model input sequence into an edge intelligent prediction model to obtain a model-driven operation and maintenance risk judgment result; and the problems that different reporting strategy gears are prone to introducing derived characteristic deviation in the prior art, and then causing risk discrimination fluctuation and operation and maintenance scheduling jitter are solved.