Strontium-zirconium-titanium-yttrium quaternary composite microalloyed 800MPa-strength-grade high-performance aluminum alloy and preparation method thereof

The invention relates to a strontium-zirconium-titanium-yttrium quaternary composite microalloyed 800MPa-strength-grade high-performance aluminum alloy and a preparation method thereof, and is characterized in that the aluminum alloy mainly comprises the following components in percentage by mass: 11.0-11.5% of zinc, 3.09-3.11% of magnesium, 1.21-1.26% of copper, 0.0092-0.0188% of strontium, 0.265-0.362% of zirconium, and the balance of yttrium. The mass percent of titanium is 0.0647-0.127%, the mass percent of yttrium is 0.15-0.45% (nominal), and the balance is aluminum and a small amount of impurity elements; the sum of all the components is 100%. The preparation method of the alloy sequentially comprises the following steps: (1) casting; (2) carrying out homogenization treatment; (3) hot extrusion; (4) solution treatment; and (5) aging treatment. The maximum strength of the alloy can reach 797.932 MPa, meanwhile, the percentage elongation after fracture is 6.0%, and the maximum intergranular ...

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Preparation method of 2024 aluminum alloy material with high strength and good elongation at break

The invention relates to a 2024 aluminum alloy material, in particular to a preparation method of a 2024 aluminum alloy material with high strength and good elongation at break. According to the method, deep laser shock treatment is conducted on the GH4169 nickel-based superalloy through laser, and then forging shaping and deformation treatment are conducted on the material subjected to deep shock treatment. Rare single nanoscale strengthening phase rod-like T and a large number of dense dislocation walls are formed after treatment, and the strength of the material is improved. Especially, a single strengthening phase T is formed in 2024 aluminum alloy, and no public report is found yet.

Method for resisting environmental corrosion of thermal barrier coating through laser composite pre-sintering treatment

The invention provides a method for resisting environmental corrosion of a thermal barrier coating through laser composite pre-sintering treatment. The method comprises the following steps that S1, the critical power density Pm needed for starting melting of the surface of the thermal barrier coating is determined, and the critical power density Pv needed for starting gasification of the surface of the thermal barrier coating is determined; s2, high-energy pulse laser conducts first glazing on the surface of the thermal barrier coating at the power density of P1: 1/2 (Pm + Pv); s3, the high-energy pulse laser conducts second glazing on the surface of the thermal barrier coating according to the power density P2: 1/2 (Pm + P1); s4, the high-energy pulse laser conducts nth glazing on the surface of the thermal barrier coating according to the power density Pn: 1/2 (Pm + Pn-1), n = 2, 3, 4... till the surface microcrack width lt is reached; stopping glazing when the length is 1 mu m; and S5 ...

Wounded personnel scheduling method and system based on RFID (Radio Frequency Identification Device) and injury inspection classification result

The invention discloses a wounded person scheduling method and system based on RFID and an injury inspection classification result, and relates to the technical field of wounded person scheduling. Configuring an RFID tag for each wounded person, and performing classified queue arrangement on the electronic business ticket information of each wounded person based on the write-in time t1 and the read time t2; obtaining mild symptom scheduling guidance based on a classification queue arrangement result and a Hash space method; wounded personnel scheduling is carried out based on a classification queue arrangement result and mild symptom scheduling guidance, and tracking and positioning are carried out on unread wounded personnel RFID tags. According to the invention, a direct-view injury inspection classification queue is provided for dispatchers and wounded personnel, so that the dispatchers and the wounded personnel can conveniently carry out active or passive dispatching; manpower and material ...

Telescopic outdoor sunshade pavilion

The telescopic outdoor sunshade pavilion comprises a pavilion plate, a fixing plate, a bearing column, an anti-reflection direct light sunshade mechanism and a heat radiation sinking type anti-steaming mechanism, the fixing plate is arranged on the upper wall of the pavilion plate, the bearing column is arranged on the upper wall of the fixing plate, the anti-reflection direct light sunshade mechanism is arranged on the upper wall of the bearing column, and the heat radiation sinking type anti-steaming mechanism is arranged on the upper wall of the bearing column. The thermal radiation sinking type anti-steaming mechanism is arranged on the anti-reflection type direct light shading mechanism, and the anti-reflection type direct light shading mechanism comprises a split sliding mechanism and a direct light shading mechanism. The invention belongs to the technical field of sunshade pavilions, and particularly relates to a telescopic outdoor sunshade pavilion. The telescopic outdoor sunshade ...

Load flow calculation method for multi-energy complementary AC/DC hybrid power distribution network

A load flow calculation method for a multi-energy complementary AC/DC hybrid power distribution network comprises the following steps: S1, obtaining a power line of a related equipment node, constructing a topological structure of the power distribution network, collecting topological structure information, and establishing a loop-branch matrix; s2, performing load flow calculation module division based on the topological structure of the power distribution network, and dividing the load flow calculation module into an alternating current sub-network module, a direct current sub-network module and a current converter module; s3, setting a control mode of the direct current sub-network module, and setting initial values, positive directions and convergence precision of the alternating current sub-network module and the direct current sub-network module; s4, performing alternating iteration convergence judgment on load flow calculation of the alternating current sub-network module and the ...

Scene discrimination method suitable for safety management and control of construction operation site

A scene discrimination method suitable for safety management and control of a construction operation site comprises the following steps: firstly, collecting image data of the construction operation site, converting the image data into a single-frame image, and extracting image feature information of a violation phenomenon in the single-frame image to obtain an image feature material; establishing a set pair analysis comprehensive evaluation model by using the safety management and control evaluation indexes; and finally, discriminating the image feature material by using the set pair analysis comprehensive evaluation model, and determining the violation phenomenon of the construction operation site. In the application of the method, the images of the construction operation site are collected, the evaluation analysis model is established to discriminate and analyze the images, the violation phenomenon existing in the construction operation site is confirmed, the safety management level of ...

Construction method of free-form surface concrete thick-shell opposite-pull screw system

The invention relates to a construction method of a free-form surface concrete thick-shell opposite-pull screw system. The construction method comprises the following steps: constructing a bottom die; laying bottom-layer steel bars; opposite-pull screw holes are drilled in the bottom die; penetrating a first section of opposite-pull screw at the lower part; laying a next layer of reinforcing steel bars, and connecting a next section of opposite-pull screw rod; repeating the previous step until the top of the opposite-pull screw rod reaches the steel bar layer on the upper surface of the thick shell, and then connecting the two; covering and accurately positioning an upper surface template, and marking the position of an opposite-pull screw hole of the upper surface template; the upper surface curved surface template is removed; welding a first section of opposite-pull screw at the upper part; covering again and accurately positioning the upper surface template; connecting a second section ...

Shutdown pressure maintaining method for earth pressure balance shield tunneling machine

The invention discloses a shutdown pressure maintaining method for an earth pressure balance shield tunneling machine, and belongs to the technical field of earth pressure balance shield tunneling machines. S2, preparing items; s3, soil improvement; s4, machine operation and site selection: selecting a proper shutdown site, adjusting the posture of the shield tunneling machine during shutdown, reducing the deslagging amount of a spiral dumping device, filling a sealing area of a shield tail brush with grease to reinforce sealing, and injecting bentonite slurry into the periphery of the shield body through a grouting hole in the shield body; a series of preparatory work needs to be carried out. By combining equipment maintenance, muck improvement and parameter control, the problem that in the using process of an existing pressure maintaining method, soil is prone to generating the phenomenon that the upper portion is soft and the lower portion is hard, and consequently soil pressure balance ...

Power grid infrastructure equipment defect filing method based on unmanned aerial vehicle patrol data

A power grid infrastructure equipment defect archiving method based on unmanned aerial vehicle patrol data comprises the steps that firstly, a plurality of sample image libraries belonging to different application scenes are constructed based on the unmanned aerial vehicle patrol data, and the sample image libraries comprise equipment defect sample images and equipment normal sample images; then, obtaining a to-be-detected equipment image based on the unmanned aerial vehicle patrol data, performing feature extraction on the to-be-detected equipment image, performing application scene archiving on the to-be-detected equipment image by using a KNN algorithm based on the extracted image features, and outputting an archiving result; and then calculating the similarity between the to-be-detected equipment image and each sample image in the sample database corresponding to the application scene to which the to-be-detected equipment image belongs one by one based on the image features, finally ...

Hybrid energy storage configuration method and system for stabilizing new energy fluctuation and medium

The invention discloses a hybrid energy storage configuration method and system for stabilizing new energy fluctuation and a medium, and belongs to the field of electrical engineering, and the method comprises the steps: building new energy output fluctuation indexes of a combined system under different time scales, and building an energy storage model corresponding to the energy storage type of the combined system; a hybrid energy storage optimization configuration model is established according to the new energy output fluctuation index and the energy storage model by taking the minimum total cost in the energy storage participation fluctuation stabilization period as the target, and the total cost comprises new energy output fluctuation out-of-limit penalty cost under each time scale; and solving the hybrid energy storage optimal configuration model under the limitation of meeting the constraint condition of the combined system to obtain a hybrid energy storage configuration scheme so ...

GROUP-CALLING REGION MANAGEMENT METHOD UNDER SC-PTM SYSTEM

The invention provides a group-calling region management method under an SC-PTM system. The method comprises: when a cell is selected, a UE participating in a group call sends to a target cell a first message carrying a group identifier, a source cell identifier and a UE identifier; after receiving the first message, the target cell sends to the MCE thereof a second message carrying a group identifier, a UE identifier, a source cell identifier and a target cell identifier; the MCE maintains the group call list of target cells according to the group identifier and the UE identifier, and according to the target cell identifier, transmits to the corresponding target cell a third message carrying an indication about whether the group call bearer type is to be converted, deletes from a source cell group call list the UE identification information in the group call, and according to the source cell identifier transmits to the corresponding source cell a fourth message with an indication about ...

Construction method, recording medium and system of equipment whole life cycle cost prediction model

The invention belongs to the technical field of power equipment management, and discloses a construction method of an equipment whole life cycle cost prediction model, a cost model is constructed through data pre-classification, exponential smoothing processing, weight calculation and the like, data measured by the cost model is matched with data actually generated later, and the prediction accuracy of the equipment whole life cycle cost prediction model is improved. The defects that a conventional cost optimization method is not accurate enough and falls into a local optimal solution are overcome, and the optimization performance is improved. The invention further provides a non-transient readable recording medium and a system comprising the medium, the non-transient readable recording medium stores a construction program of the equipment full-life-cycle cost prediction model, the program can be called through a processing circuit to execute the method, and the non-transient readable recording ...

Electric vehicle charging and discharging cooperative scheduling method and system for multiple optical storage charging stations

The invention provides an electric vehicle charging and discharging cooperative scheduling method for multiple optical storage charging stations, and the method comprises the steps: firstly building a micro-grid internal composition unit model and constraint conditions of an electric vehicle, including an electric vehicle monomer charging and discharging model and an energy storage charging and discharging model; then establishing an electric vehicle charging and discharging dynamic electricity price model; and finally, based on the micro-grid internal composition unit model and the electric vehicle charging and discharging dynamic electricity price model, establishing a multi-optical-storage charging station collaborative optimization architecture and strategy, including an electric vehicle layered and grouped scheduling framework, an electric vehicle underlying cluster model, a micro-grid objective function and constraint condition and a distribution network power flow model. Cooperative ...

Solid hydrogen storage tank for heat exchange through finger-shaped pipes

The invention discloses a solid hydrogen storage tank for heat exchange through finger-shaped tubes. The solid hydrogen storage tank comprises a tank body, a gas distributor and a finger-shaped tube heat exchanger. The heat exchange efficiency of a solid hydrogen storage material in the solid hydrogen storage tank is remarkably improved, the temperature difference of the finger-shaped heat exchange pipes in the length direction is small under the combined action of the inner pipe and the outer pipe, and the heat exchange condition in the tank is uniform due to the fact that the finger-shaped pipes are arranged in parallel; the flow guide spiral between the inner pipe and the outer pipe improves the flow speed and the Reynolds coefficient of a heat exchange medium and improves the heat exchange efficiency; due to the structure and the arrangement of the gas distributor, the hydrogen is in uniform contact with the hydrogen storage alloy material, uniform heat release of hydrogen absorption ...

Remote sensing image engineering quantity monitoring method based on neural network

A remote sensing image engineering quantity monitoring method based on a neural network comprises the steps that firstly, a semantic segmentation model based on the convolutional neural network is constructed, the model is used for conducting intelligent interpretation on remote sensing images in a front period and a back period, target ground objects in the remote sensing images are accurately extracted, then the images in the front period and the back period are segmented through an SLIC superpixel segmentation algorithm, and the remote sensing images in the front period and the back period are obtained. And carrying out change detection, extracting change confidence maps of the images in the previous and later periods, and finally outputting change pattern spots as a judgment basis of engineering quantity change. According to the method, the construction range and progress can be accurately judged, large-range, full-coverage, whole-process and traceable dynamic monitoring of power grid ...

Grid-connected overvoltage suppression method based on wind power reactive power excess index prediction

The invention provides a grid-connected overvoltage suppression method based on wind power reactive power excess index prediction, which comprises the following steps of: measuring active and reactive power output power data of a wind turbine generator at a fan grid-connected point in a power grid at the current moment, and charging power and discharging power data of a battery energy storage system; active and reactive output power data of the coal-fired power generator set, reactive compensation power data of a reactive compensation device and active and reactive power data of a load; calculating a wind power reactive power excess index of the power grid at the current moment; if the wind power reactive power excess index of the power grid at the current moment is greater than or equal to a set threshold value, predicting the wind power reactive power excess index at the next moment through iterative calculation according to the power data measured at the current moment; and the calculation ...

Civil air defense material automatic warehousing method and device based on X-ray

The invention provides an X-ray-based automatic warehousing method and device for civil air defense materials, relates to the technical field of civil air defense, and solves the technical problem of low security degree of the materials in a civil air defense storage warehouse. The method comprises the following steps: detecting the shape and size of a first civil air defense material through X rays, and obtaining the weight of the first civil air defense material through a gravity detection device; determining the type of the first civil air defense material according to the shape, the size and the weight, and determining a target environment condition required for storing the first civil air defense material based on the type; and controlling a mobile device to move the first civil air defense material to a target warehousing position corresponding to the target environment condition based on the target environment condition.

Container freight rate index-based freight rate guidance method and system

The invention relates to a container freight rate index-based freight rate guidance method and a container freight rate index-based freight rate guidance system. According to the method, the regional indexes of different container types in the to-be-evaluated period and the comprehensive index in the pre-selected region in the to-be-evaluated period are obtained and sent to a specified display device for presentation, and the recent container freight rate index is obtained by using the real transaction freight rate and can be effectively used as a guidance basis for the shipping price of a navigation company. The method can be used as an important freight rate index for monitoring and evaluating the domestic trade coastal container market, as an important index for industry trend judgment and analysis to serve industry peers and customers, as an index for reflecting the market change trend and judging the logistics cost, as a market linking basis in a customer contract to effectively improve ...

Kit for detecting novel coronavirus in saliva

The invention discloses a kit for detecting novel coronavirus in saliva, which comprises a kit body, the kit body comprises a sampling plate and a detection plate, one end of the sampling plate is provided with a splicing groove, one end of the detection plate is provided with an elastic joint, and the distance between the adjacent elastic joints is the same as the distance between the adjacent splicing grooves. A one-way reverse osmosis head is arranged at a sampling opening in the top face of the sampling plate, an extrusion channel is formed in the bottom face of the one-way reverse osmosis head, a colloidal gold pad is arranged in the sampling plate, a detection layer and water absorption filter paper are arranged in the detection plate, and the water absorption filter paper is located at the tail end of the detection layer. An antigen strip and a quality control line are respectively arranged on the top surface of the detection layer, so that split mounting can be realized, the detection ...

Water vapor thermodynamic cycle system for the regulator and its preparation method

... 本发明提供种水汽热力循环系统用调节剂，按重量百分比由以下组分组成：5～30％的长链脂肪族多胺，20～70％的碱化剂，20～40％的烷基取代苯磺酸的衍生物，水0～10％。本发明的调节剂能在金属表面形成单分子膜，借此有效抑制水汽热力循环系统中的金属腐蚀和结垢，以及防止汽轮机积盐。 ...

Cassava MeANR-VIGS system and application thereof

The invention provides a silent fragment of a cassava MeANR gene with a nucleotide sequence as shown in SEQ ID NO: 2, a cassava MeANR-VIGS system constructed by adopting the silent fragment and application of the cassava MeANR-VIGS system. The specific silent segment of the cassava MeANR gene is adopted to construct a silent system, the target gene MeANR can be effectively silent, the anthocyanin content of the plant can be effectively increased, meanwhile, the corrosion resistance of the plant can be remarkably improved, and the plant phenotype can be improved, for example, after cassava is transfected with the silent segment, the expression of the MeANR gene is inhibited; the content of anthocyanin in cassava leaves is remarkably increased, the rotting speed of cassava tuberous roots after harvesting is remarkably reduced, the rotting resistance after harvesting is improved, the biomass of the overground part is remarkably increased, and the number of fibrous roots in underground tuberous ...

Earth pressure balance shield air-entrapping drainage tunneling construction method

The invention discloses an earth pressure balance shield air-entrapping drainage tunneling construction method, which relates to the technical field of shield tunneling construction, and comprises the following steps: step 1, preparation before shield tunneling machine construction, step 2, shield tunneling machine tunneling construction, step 3, air-entrapping pipe installation, step 4, segment assembly construction, and step 5, grouting. According to the method, in the tunneling construction process of the shield tunneling machine, shield tunneling machine propelling and grouting are synchronously carried out, deformation to the ground is avoided, swelling slurry is injected into the outer wall of the duct piece through the grouting system, a water stop ring is formed between the swelling slurry and the duct piece, and the water stop ring is prevented from being blocked. According to the shield tunneling machine, the phenomenon of gushing in the stratum can be avoided, and in the tunneling ...

Waveguide narrow-edge slot bridge phase shifter with rotary choke piston

The invention discloses a waveguide narrow-edge slot bridge phase shifter with a rotary choke piston, and belongs to the technical field of microwave transmission. The phase shifter comprises a rectangular waveguide narrow-side slot bridge, an annular waveguide phase shifting section and a rotary choke piston, the annular waveguide phase shift section is sequentially connected with the lower side rectangular waveguide transition section, the annular surface cylindrical cavity section and the upper side rectangular waveguide transition section, and is divided into two symmetrical microwave transmission channels through a separation structure and a central spacer. Microwaves are injected into the annular waveguide phase shift section through the rectangular waveguide narrow-side slot bridge, are transmitted for a distance in the two microwave transmission channels, are reflected by the rotary choke piston, and are finally output from the rectangular waveguide narrow-side slot bridge. The ...

Json file generation method and device for DataX system and electronic equipment

The invention relates to the technical field of data processing, in particular to a json file generation method and device for a DataX system and electronic equipment. The method comprises the steps that a query statement is generated based on table structure information of a first data table in a source database and table structure information of a second data table in a target database, and the query statement is used for obtaining fields existing in the first data table and the second data table at the same time; the second data table is a corresponding data table formed after the first data table is mapped from the source database to the target database; for each field of the fields which exist at the same time, obtaining a field type of the field in the second data table; and generating the json file based on the query statement and the field type. According to the method, the json file is automatically generated based on the table structures of the source data table and the target ...

Swine transmissible gastroenteritis virus detection kit and detection method

The invention discloses a swine transmissible gastroenteritis virus detection kit and detection method.The swine transmissible gastroenteritis virus detection kit comprises a kit body, a serum reagent strip and a supernatant reagent strip are placed in the kit body, the adjacent faces of the serum reagent strip and the supernatant reagent strip are attached to each other, and the serum reagent strip and the supernatant reagent strip are the same in shape and size; a rack and a limiting plate are bonded to one side of the serum reagent strip, the limiting plate is located on the bottom face of the rack, a drawing groove is formed in one side of the supernatant reagent strip, a limiting groove and a rotating cylinder are arranged in the drawing groove, and toothed saws are arranged on the surface of the rotating cylinder in a circumferential array mode. When the porcine infectious gastroenteritis virus is detected, a sample of porcine serum or porcine visceral organ grinding fluid supernatant ...

Multi-sensor fusion maglev train ground speed measurement method and system

The invention discloses a multi-sensor fusion maglev train ground speed measurement method and system. The method comprises the steps that S1, detection results of two ultrasonic speed measurement radars installed on the ground on a maglev train are fused to obtain radar speed measurement data of the maglev train; s2, fusing maglev train picture data acquired by a binocular camera mounted on the ground to obtain camera speed data of the maglev train; and S3, fusing the radar speed measurement data and the camera speed data in a complementary filtering mode to obtain the actual speed of the maglev train. According to the invention, the original data is acquired by adopting the speed measuring device with relatively low precision and relatively low frequency, and relatively high-precision and relatively high-frequency speed acquisition is realized through a multi-time data fusion mode, so that system requirements are met. Other devices do not need to be additionally arranged on the maglev ...

Solar light following system

The invention discloses a solar light following system, and relates to the technical field of solar energy, the system comprises a suspension platform, a solar assembly, a plurality of support leg mechanisms and a plurality of gas-liquid bins, the plurality of support leg mechanisms are circumferentially arranged on the suspension platform at intervals, one end of each support leg mechanism is connected with the suspension platform, and the other end of each support leg mechanism is connected with the gas-liquid bins; the multiple gas-liquid bins are arranged on the outer side of the suspension platform at intervals in the circumferential direction, and the suspension platform is arranged in the middle in a surrounding mode. The gas-liquid bins are filled with volatile solutions, the other end of each supporting leg mechanism extends into one gas-liquid bin, and the supporting leg mechanisms provide buoyancy for the suspension platform through the volatile solutions. Volatile liquid in ...

Active power distribution network distributed resource primary frequency modulation cooperative control method

An active power distribution network distributed resource primary frequency modulation cooperative control method comprises the following steps that S1, an active power distribution network frequency response model containing distributed resources is constructed, and in the frequency response model, each agent establishes a relation with a frequency modulation resource cluster of one type, the intelligent agent adjusts the frequency response coefficient which should be provided by each frequency modulation resource, so that the economic optimization is realized under the condition of output; s2, setting a plurality of groups of same power disturbances in the frequency response model, and determining fixed parameters in the frequency response model through parameter identification; and S3, optimizing and solving the output of each frequency modulation resource by using a consistency algorithm. The frequency modulation potential of the active power distribution network is fully utilized, ...

ELISA kit for detecting African swine fever virus

The invention discloses an ELISA (enzyme-linked immuno sorbent assay) kit for detecting African swine fever virus, which belongs to the technical field of swine fever virus detection, and comprises the steps of material preparation, CD2v protein bioinformatics analysis, CD2v recombinant protein prokaryotic expression and purification, establishment and result analysis based on a CD2v recombinant protein indirect ELISA method, and expression and purification of CD2v inner membrane recombinant protein by adopting a prokaryotic expression system. An indirect ELISA method is established and optimized by using the protein as a coating antigen, the method has good specificity, sensitivity and repeatability, has no cross reaction on ASFV (CD2v) deleted strains, PRRSV, FMDV-O type, PRV-gE, CSFV, PCV2 and other common swine disease antibody positive serum, can detect ASFV standard positive serum samples diluted by 1280 times, and can determine whether the ASFV standard positive serum samples are ...

Intelligent management and control method for power-cut plan of power grid

The invention discloses an intelligent management and control method for a power-cut plan of a power grid, and the method is characterized in that the method comprises the following steps: S1, a system receives an application; s2, dividing importance degrees of the applications; s3, determining a maintenance plan; s4, executing the maintenance plan; the maintenance plans comprise an annual plan, a monthly plan, a weekly plan and a daily plan, the maintenance plans automatically generate preliminary examination suggestions according to different types of power grid out-of-service equipment and weekly plan precautions, and a Gantt chart is automatically formed after the system receives an application; through the method, the processing of the equipment maintenance application is more efficient, the management and control of the power-off plan are more efficient, and the process of power-off information management is more transparent.

Shield tunneling machine soil bin state detection method and soil bin state detection system

The invention discloses a shield tunneling machine soil bin state detection method and a soil bin state detection system, and belongs to the technical field of shield tunneling machine technologies. The shield tunneling machine soil bin state detection method comprises the following steps: determining internal images of a shield tunneling machine soil bin, and classifying and marking the internal images of the soil bin to obtain a sample data set; constructing a soil bin state detection model comprising a convolutional layer, a feature extraction backbone network and a classification layer which are connected in sequence; performing offline iterative training optimization on a weight parameter omega 0 of the soil bin state detection model by using the sample data set to obtain a soil bin state detection model with an optimal weight omega, and embedding the trained soil bin state detection model into a shield tunneling machine soil bin state detection system; and inputting the current soil ...

Comprehensive monitoring system and method for intelligent distribution transformer

An intelligent comprehensive monitoring system for a distribution transformer comprises a partial discharge sensor and a vibration sensor which are installed on a transformer shell, a three-phase imbalance sensor installed at the top of a transformer bushing, a sound sensor and a micro meteorological station which are located near the transformer, and a monitoring and diagnosis terminal. And the monitoring diagnosis terminal comprises a transformer operation diagnosis unit, an internal part loosening diagnosis unit and a transformer bushing diagnosis unit. According to the method, multiple transformer faults such as internal part loosening and transformer bushing faults are predicted through the transformer operation parameters collected in real time, hidden dangers of the transformer can be found as early as possible, and influences caused by the faults are reduced as far as possible.

Concentrated feed feeding trough for beef cattle breeding

The invention belongs to the technical field of animal husbandry, and particularly relates to a beef cattle breeding concentrated feed feeding trough which comprises a bottom plate, two side supporting plates are fixed to the bottom plate, a feed storage box is fixed to the two side supporting plates, and a feed trough is formed in the bottom plate; the discharging assembly comprises a cylindrical shell fixed to the bottom of the material storage box, open grooves are formed in the top and the bottom of the cylindrical shell, the open groove in the top of the cylindrical shell communicates with a discharging opening of the material storage box, a rotating shaft is rotationally connected into the cylindrical shell, four partition plates distributed in an annular array are fixed to the rotating shaft, and the partition plates are arranged in the open grooves in the top of the cylindrical shell. The four partition plates are connected with the inner wall of the barrel-shaped shell in a sealed ...

Medium-term load prediction method, system and equipment based on seasonal ARIMA (autoregressive integrated moving average) and GPR (general purpose ratio)

A mid-term load prediction method, system and device based on seasonal ARIMA and GPR.The method comprises the steps that a training historical data set and a target year test data set are constructed firstly, then the training historical data set is input into a seasonal ARIMA model for training, and year residual errors and system load prediction data of a target year are obtained; then replacing the original power system load with the sum of the power system load in the training historical data set and the annual residual as an updated power system load to form a new training historical data set, and inputting the new training historical data set into the Gaussian process regression model for training; and finally, inputting the system load prediction data of the target year and the test data set of the target year to form a new test data set, and inputting the new test data set into the trained Gaussian process regression model to obtain a final system load prediction result of the target ...

Power distribution network transformation value evaluation method and system, storage medium and equipment

The invention relates to a power distribution network reconstruction value evaluation method and system, a storage medium and equipment, and the method comprises the steps: obtaining the historical load information of an existing power grid in a target region in a set time period, and determining the load grade and load weight coefficient of the existing power grid corresponding to each sub-region in the target region; and obtaining engineering data information and single transformation price information corresponding to the power distribution network engineering transformation type, and calculating a power distribution network transformation value in combination with the load weight coefficient of each sub-partition and the capacity-load ratio of the power distribution network engineering facility in the target area. According to the method, historical load information is analyzed, a load grade and a load weight coefficient corresponding to each sub-partition are determined by combining ...

Preparation method of chitin/chitosan material compounded with natural calcium carbonate

The invention relates to the technical field of natural macromolecules and macromolecular materials, in particular to a preparation method of a chitin/chitosan material compounded with natural calcium carbonate, which comprises the following steps: performing deproteinization treatment on raw materials containing natural calcium carbonate and chitin/chitosan, performing oxidation decolorization treatment by using 1-5wt% H2O2 aqueous solution, performing deacetylation reaction, and performing vacuum drying to obtain the chitin/chitosan material compounded with natural calcium carbonate. And washing to obtain a raw material containing natural calcium carbonate and chitin/chitosan with different deacetylation degrees. A chitin/chitosan-natural calcium carbonate raw material is dissolved under an alkaline condition to prepare a chitin material compounded with natural calcium carbonate or a chitosan material compounded with natural calcium carbonate. The chitin/chitosan-natural calcium carbonate ...

Adaptive underground pipe network robot multi-source fusion positioning method based on factor graph weight

The invention discloses a factor graph weight-based adaptive underground pipe network robot multi-source fusion positioning method, which is a method for performing combined positioning on inertial navigation positioning, extremely low frequency positioning, radio frequency positioning and underground pipe network map multi-source sensors. The method comprises the following steps: firstly, according to INSUWBELF measurement and an error model, constructing an INSUWBELF factor node and a cost function of the INSUWBELF factor node, dynamically updating and adjusting the weight of each sensor in a factor graph through a measurement error at each moment, applying a sliding window constraint, reducing the dimension of navigation prior information, and according to an optimal estimation sequence of preliminary fusion, carrying out optimal estimation on the navigation prior information. A hidden Markov model is established on the basis, map matching is carried out, a Viterbi algorithm is used ...

Sedimentation tank suitable for terrains with complex height difference

The invention provides a sedimentation tank suitable for complex height difference terrains, which comprises ground, a sedimentation tank bottom and a sedimentation tank body, and is characterized in that a single-stage sedimentation tank is arranged on each of the ground with height difference, round holes are formed in two parallel sides of the sedimentation tank body in a penetrating manner, the round holes in the two sides correspond to each other, and a pipeline is mounted between every two adjacent sedimentation tanks; a water inlet is formed in the round hole in one side of the first single-stage sedimentation tank, a water outlet is formed in the round hole in one side of the last single-stage sedimentation tank, a partition plate is arranged between the two sides, not provided with the round holes, of the sedimentation tank body, and overflow holes are formed in the partition plate. And the position height of the overflow hole is lower than the height of the sedimentation tank.

Technical improvement investment scale prediction method and system based on Weibull distribution

The invention discloses a technical improvement investment scale prediction method based on Weibull distribution, and the method comprises the steps: obtaining the Weibull scrap probability distribution of a prediction object through the Weibull distribution fitting based on the historical scrap amount of each service age of the prediction object, and predicting the number update scale of the prediction object according to the Weibull scrap probability distribution of the prediction object. And finally, determining the technical improvement investment scale by combining the proportion of the technical improvement scrap in the total scrap and the total update value scale of the prediction object. According to the method, the survival probability curve and the Weibull scrap probability distribution curve are introduced, so that accurate prediction of the future middle and long term technical improvement investment scale is realized.

Specimen storage box capable of automatically opening door through code scanning

The specimen storage box comprises a constant-temperature storage box body and an electromagnet, supporting bottom feet are arranged at the four corners of the lower end of the constant-temperature storage box body, a rotating door is arranged at the front end of the constant-temperature storage box body, and the middle of the right side of the rotating door is sleeved with a clamping column type intelligent lock. The clamping column type intelligent lock comprises an intelligent lock main body, a spring clamping column, a USB interface, a data interface and a power interface, and is fixedly connected with the rotating door through the spring clamping column due to the fact that the clamping column type intelligent lock is installed, when the intelligent lock main body in the clamping column type intelligent lock is damaged, the clamping column type intelligent lock can be unlocked. The damaged clamping column type intelligent lock can be rapidly taken down by disassembling the clamping ...

Power imbalance control method and control system for constant-current-to-constant-voltage conversion system

The invention provides a power imbalance control method and control system for a constant-current-to-constant-voltage conversion system, and the system comprises a central control ring and n constant-current-to-constant-voltage conversion sub-modules, the input ends of the n constant-current-to-constant-voltage conversion sub-modules are connected in series, and the output ends of the n constant-current-to-constant-voltage conversion sub-modules are connected in parallel. The central control loop outputs voltage to control the outer loop and the sub-module bus voltage to control the inner loop so as to realize system power imbalance control. Wherein the output voltage control outer ring is used for adjusting and following an output voltage reference value, and the bus voltage control inner ring is used for adjusting and following a new bus voltage reference value. And after the output load changes, seamless switching of each sub-module is automatically realized. The stability of the load ...

METHOD FOR MANAGING GROUP CALL AREAS IN SC-PTM SYSTEM

A method for managing group call areas in an SC-PTM system is provided in the present invention, comprising: UE participating in a group call sends a first message carrying a group call group identifier, a source cell identifier and a UE identifier to a target cell when the UE is reselecting a cell; the target cell determines that the UE participates in the group call according to the group identifier, maintains a group call list of the target cell according to the group identifier and the UE identifier, and according to the source cell identifier, sends a second message (carrying the UE identifier and the group identifier) to a source cell corresponding to the source cell identifier; after receiving the second message, the source cell determines the group call participated by the UE according to the group identifier, deletes the information of the UE identifier in the group call of the group call list of the source cell, determines the number of the UE participating in the group call according ...

Transmission and distribution frequency modulation resource cooperative control method based on federal reinforcement learning algorithm

The invention discloses a transmission and distribution frequency modulation resource cooperative control method based on a federal reinforcement learning algorithm. The method comprises the following steps: dividing a regional power grid into a main network area and a plurality of distribution network areas; setting an intelligent agent in a dispatching center of each area, and establishing a corresponding DQN neural network model for each intelligent agent; each agent performs local training on the corresponding DQN neural network model by using the data of the corresponding area, encrypts the information of the locally trained DQN neural network model, and uploads the encrypted information to an aggregation center; the aggregation center performs gradient average processing on the encrypted information and returns the processed information to each agent, and each agent performs subsequent training on the locally trained DQN neural network model by using the information subjected to gradient ...

Cutterhead mud cake detection method and device, electronic equipment and storage medium

The invention discloses a cutter mud cake detection method and device, electronic equipment and a storage medium, and belongs to the technical field of tunnel construction. The detection method comprises the following steps: reading historical tunneling data from a PLC (Programmable Logic Controller) and an industrial personal computer of the shield tunneling machine; a parameter trend detection model is trained by using mud cake related parameters in historical tunneling data; the parameter trend detection model comprises a one-dimensional convolutional layer, an LSTM layer and a full connection layer; obtaining mud cake formation related parameters of the shield tunneling machine in the target time period, and inputting the mud cake formation related parameters in the target time period into the parameter trend detection model to obtain a change trend of the mud cake formation related parameters in the target time period; judging whether the change trend of the mud cake formation related ...

Medium and long term prediction method for integrated photovoltaic generating capacity based on feature selection

An integrated photovoltaic generating capacity medium and long term prediction method based on feature selection comprises the steps of firstly obtaining influence factor variables influencing photovoltaic generating capacity, then performing feature selection on the influence factor variables by using correlation analysis and a backward elimination method, and then establishing a prediction model. Historical data of the selected influence factor variables are obtained and serve as input of a prediction model, the prediction model is trained and predicted, and medium and long term prediction values of the photovoltaic power generation capacity are obtained. According to the method, firstly, feature selection is carried out through correlation analysis and a backward elimination method, and then the selected influence factor variables are used as the input of the prediction model, so that excessive fitting and multiple collinearity can be prevented, and the accuracy and reliability of model ...

Internet of Things electronic weighing device and control method thereof

The invention provides an Internet of Things electronic weighing device and a control method thereof, and the device comprises a controller, a detection assembly and a block chain module, and the detection assembly and the block chain module are connected with the controller. Wherein the detection assembly is used for detecting a target signal corresponding to a to-be-detected object; the controller is used for calculating weighing data corresponding to the object to be measured according to the target signal; and the block chain module is used for carrying out identity legality verification on the controller and sending the weighing data to a target block chain when the identity legality verification is passed. According to the invention, traceability and tracking of the weighing data can be realized, and the data value of the weighing data can be deeply mined.

Anti-5-hydroxymethylfurfural hapten, complete antigen and antibody, and preparation methods of hapten, complete antigen and antibody

The invention discloses a hapten, a complete antigen and an antibody for resisting 5-hydroxymethylfurfural and preparation methods of the hapten, the complete antigen and the antibody, and relates to a preparation method of the hapten, the complete antigen and the antibody for resisting 5-hydroxymethylfurfural, which can retain a 5-hydroxymethylfurfural structure to the greatest extent. Activated ester of 5-hydroxymethylfurfural prepared by a chemical synthesis method is connected with carrier protein keyhole limpet hemocyanin to synthesize the anti-5-hydroxymethylfurfural complete antigen, and the antibody is prepared by performing animal immunization, cell fusion and screening, ascites antibody preparation and ascites purification on an artificial antigen. The hapten which maximally retains a 5-hydroxymethylfurfural structure is synthesized through experimental design, the specific structure of the hapten is highlighted, and the specificity of the obtained monoclonal antibody is relatively ...

Zero-waste-yarn bottom starting control method of full-automatic computerized flat knitting machine

The invention discloses a zero-waste-yarn bottom starting control method of a full-automatic computerized flat knitting machine, which comprises the following operation steps that a front roller servo driver drives a front roller servo motor to work, a rear roller servo driver drives a rear roller servo motor to work, the front roller servo motor drives a front roller control module to control a front roller, and the rear roller servo motor drives a rear roller control module to control a rear roller. The rear roller servo motor drives the rear roller control module to control the rear roller, waste yarn bottom raising is controlled through the front roller and the rear roller, and the effect of zero waste yarn bottom raising is achieved. According to the zero-waste-yarn bottom-raising control method of the full-automatic computerized flat knitting machine, the double-roller control module and the waste yarn bottom-raising state monitoring module are arranged, bottom-raising operation can ...

Personnel qualification review and performance on-duty comparison system and method based on block chain

According to the personnel qualification examination and performance on-duty comparison system and method based on the block chain, the personnel qualification comparison system is established based on the block chain, management of identity authentication and access authority of each node is realized by designing supervision department nodes, and a reliable registration access mechanism is established, so that identity information of participants is real and reliable; participation of a trusted third party is not needed, real and effective identity of each node is ensured, and decentration and non-tampering of the block chain are inherited at the same time; and an intelligent contract with an evaluation function is designed, an examination and comparison personnel node is stimulated to actively act as an endorsement node, and examination and comparison personnel are required to link data, processes and results in an examination process, so that an examination program is open, transparent ...

Power supply device and power supply method for locomotive moving

The invention discloses a power supply device for moving a locomotive, which is mounted in a body of a moved locomotive and comprises a storage battery, a power supply device and a power supply device, the converter is used for converting an output power supply of the storage battery into a direct-current power supply and then converting the direct-current power supply into an alternating-current power supply for a moved locomotive body, or converting the output power supply of the storage battery into a pulse width modulation power supply and then adjusting the pulse width modulation power supply into the alternating-current power supply; the DC power supply voltage is greater than the storage battery output power supply voltage. According to the invention, the cost input of a motor car power supply in a ground garage can be canceled, other safety problems caused by a motor car cable in the garage are avoided, and the technical defects of high-rate discharge, large voltage drop of a storage ...

Power failure application management method based on regulation and control cloud model

The invention discloses a power failure application management method based on a regulation and control cloud model, and the method comprises the steps: carrying out a maintenance plan according to a power failure request of each cloud device based on the regulation and control cloud model, and the implementation steps are as follows: 1, obtaining the information of a device needing to be maintained, and obtaining the starting time and the ending time of maintenance application; 2, selecting a maintenance unit according to the power failure application request; and 3, making a maintenance plan and implementing the maintenance plan by a maintenance unit. The power-cut plan is displayed through the mobile phone APP, power-cut plan information can be conveniently shared in multiple majors such as production, construction, operation and maintenance, marketing, regulation and control, and much inconvenience brought by power cut to users is reduced. The power failure application and management ...

Remote operation and maintenance platform for tunneling equipment

The invention discloses a remote operation and maintenance platform for tunneling equipment, which is applied to the technical field of computers and integrates a data acquisition module, a data transmission module, a data storage module, a human-computer interaction module and a micro-service business module by adopting a development mode with separated front and rear ends. Wherein the data acquisition module is used for acquiring tunneling data of tunneling equipment in the tunneling process, and the tunneling data is transmitted to the data storage module through the data transmission module to be stored; the man-machine interaction module realizes man-machine interaction operation; and the micro-service business module is used for realizing corresponding business functions by calling micro-services which store different business logics in advance. The performance of the remote operation and maintenance platform of the tunneling equipment can be effectively improved.

Portable large-cavity temperature and humidity generator and use method thereof

The invention discloses a portable large-cavity temperature and humidity generator and a use method thereof. The generator comprises a cavity, a drying unit, a humidifying unit, a temperature and humidity monitoring control unit and a temperature and humidity sensor. According to the portable large-cavity temperature and humidity generator disclosed by the invention, wet air can be quickly dried by dehumidifying the drying tank, and the drying tank can be repeatedly used for multiple times, so that the waste of a drying agent and the tedious operation of replacement are avoided; according to the generator, all air in the cavity is firstly extracted, the initial relative humidity of the cavity is directly returned to zero, then humidity control can be rapidly achieved by calculating the humidification time, the dual regulation and control measures of air circulation and the annular water pipe are adopted for temperature control, and temperature control can be rapidly achieved. According ...

Brucellosis CF-ELISA antibody detection kit

The invention discloses a Brucellosis CF-ELISA antibody detection kit, and belongs to the field of Brucellosis CF-ELISA detection.The Brucellosis CF-ELISA antibody detection kit comprises a shell, a detection box and a negative film are arranged in the shell, an observation opening is formed in the top of the detection box, a front detection line is arranged in the observation opening, and a rear detection line is arranged on the side, close to the front detection line, in the observation opening; a quality control line is arranged on the side, close to the rear detection line, of the interior of the observation opening, a sample placing opening is formed in one side of the top end of the detection box, and a sampling pipe is inserted into the sample placing opening. The Brucellosis CF-ELISA antibody detection kit provided by the invention realizes rapid detection of a sample by utilizing an immunochromatography technology, has the advantages of high sensitivity and short consumed time, ...

Mountain photovoltaic generating capacity calculation method

The invention discloses a mountain photovoltaic generating capacity calculation method. The method comprises the following steps: S1, obtaining a terrain grid of a photovoltaic arrangement area containing area coordinate values; s2, performing curved surface fitting on the terrain grid based on a quadric surface equation by using the regional coordinate values to obtain a fitted curved surface; s3, correcting the terrain of the sunlight radiation quantity based on the fitting curved surface to obtain the solar radiation quantity; s4, based on the solar radiation quantity, obtaining a photovoltaic power generation calculation equation of the terrain grid, and solving the photovoltaic power generation calculation equation to obtain the mountain photovoltaic power generation; in the application of the design, firstly, the terrain grid containing the regional coordinate value is obtained, fitting surface calculation is performed on the terrain grid, and then the sunlight radiation quantity ...

Preparation method of nitrogen and boron modified coal-based activated carbon for carbon dioxide adsorption

The invention discloses a preparation method of nitrogen and boron modified coal-based activated carbon for carbon dioxide adsorption, and belongs to the technical field of preparation of coal-based activated carbon. The preparation method mainly comprises the steps of raw material pretreatment, carbonization treatment, activation treatment and nitrogen and boron modification treatment. In the preparation process of the activated carbon, nitrogen and boron elements are utilized to perform doping modification treatment on the coal-based activated carbon, and the prepared coal-based activated carbon product has rich pore structures, doping groups and relatively high specific surface area, and is relatively high in CO2 adsorption selectivity, relatively large in CO2 adsorption quantity and excellent in adsorption performance. According to the method, the required raw materials are cheap and easy to obtain, the preparation process flow is simple, the activated carbon can be recycled after regeneration ...

Underground pipe gallery opportunity signal analysis method and positioning method based on ray tracing

An underground pipe gallery opportunity signal analyzing and positioning method based on ray tracing comprises an underground pipe gallery map module, an opportunity signal module based on ray tracing and an improved algorithm positioning output module, and the underground pipe gallery map module comprises a pipe network topological map, an undetermined area rasterization map and a signal intensity distribution map; the opportunity signal comprises a Wi-Fi wireless signal, a Bluetooth wireless signal, an ultra-wideband wireless signal and a statistical transmission model thereof; the wireless signal module based on ray tracing is used for simulating and generating wireless signal information; and finally, fusing map constraint, PDR and opportunity signal weight to carry out positioning analysis. According to the method, various existing radio frequency positioning information is fused, the capability of model simulation analysis and algorithm fusion processing is realized, and a foundation ...

Power grid asset ledger data multi-source streaming real-time inspection method and system

The invention discloses a multi-source streaming real-time checking method for power grid asset standing book data, and the method comprises the steps: firstly completing the training of an AI rule model through machine learning based on historical stock asset standing book data, and constructing a data checking rule chain table according to the trained AI rule model; a data inspection system composed of a plurality of data inspection flows and message flow objects is generated in real time according to the data inspection rule linked list, a storage end of the power grid in the operation asset account system is monitored in real time, and change data of the storage end is sent to a data inspection entry flow; and performing streaming real-time inspection on the data sent to the data inspection flow inlet through a data inspection system, and sending a final inspection result to an end flow and an alarm flow. According to the invention, the governance efficiency of the power grid asset ...

Remote control system of heading machine

The invention relates to the field of tunneling equipment, and discloses a tunneling machine remote control system which is composed of a first optical fiber switch, a second optical fiber switch, a remote control host, a PLC master station and an ordinary PLC substation, and a worker can output an operation instruction through the remote control host. The operation instructions are sent to the PLC master station through a local area network formed by the first optical fiber switch, the second switch and optical fibers, the PLC master station outputs corresponding action commands to the corresponding ordinary PLC substations according to the specific content of the operation instructions, and the ordinary PLC substations control the corresponding actuators to act so as to control the heading machine to work. The remote control host of the control center and the PLC control system in the working site of the heading machine form a local area network, so that real-time data communication between ...

Starch nanocrystal-sodium alginate composite particle stable Pickering emulsion and preparation method thereof

The invention discloses a starch nanocrystal-sodium alginate composite particle stable Pickering emulsion and a preparation method thereof, the starch nanocrystal-sodium alginate composite particle stable Pickering emulsion comprises a water phase and an oil phase, the water phase comprises starch nanocrystal, sodium alginate and water, and the oil phase is vegetable oil. The surface wettability and electrostatic repulsive force of starch nanocrystal particles are improved in a mode of compounding sodium alginate and starch nanocrystal, so that the starch nanocrystal particles are more easily adsorbed on an oil-water interface and are not easy to agglomerate, the stability of an emulsion is improved, and the defect that a single starch nanocrystal is used as an emulsifier is overcome; in addition, two kinds of plant polysaccharides with natural sources are selected as raw materials, so that the plant polysaccharides have the advantages of being rich in source, low in price and good in biocompatibility ...

Self-adaptive prediction method and system for residual life of mechanical equipment

The invention discloses a self-adaptive prediction method and system for residual life of mechanical equipment, and the method comprises the steps: taking real-time data of to-be-detected mechanical equipment as input, and searching a first change point of the to-be-detected mechanical equipment through an EWMA first change point detection strategy based on a drift parameter; performing feature extraction on the real-time data, searching for an optimal feature for index fusion, and constructing a virtual index based on the optimal feature; setting a training set of a GPR model according to a virtual index between the first change point and the prediction starting point, and building the GPR model according to the training set; performing hyper-parameter optimization on the GPR model by using the training set, and predicting the subsequent degradation trend of the virtual index by using the optimized model; and based on the predicted degradation trend and the fault threshold, calculating ...

Transmission and distribution collaborative optimization scheduling method considering multi-source balance dynamic full response

A transmission and distribution collaborative optimization scheduling method considering multi-source balance dynamic full response comprises the following steps that an interconnection system transmission and distribution collaborative optimization scheduling model considering the multi-source balance dynamic full response is constructed, the scheduling model takes the minimum sum of a decision-making target and an operation target as an optimization target, the decision-making target is the system planned power purchase cost, and the operation target is the operation target; the operation target comprises wind curtailment cost and standby calling cost; the constraint conditions of the scheduling model comprise a thermal power generating unit active balance dynamic full response constraint, an energy storage active balance dynamic full response constraint and a tie line active balance dynamic full response constraint; discrete processing is carried out on the active balance dynamic full ...

High-performance thermal barrier coating and preparation method thereof

The invention discloses a high-performance thermal barrier coating and a preparation method thereof.The preparation method of the high-performance thermal barrier coating comprises the steps that after a metal bonding layer is formed on the surface of a high-temperature alloy matrix, pulse electron beam irradiation and laser etching pretreatment are sequentially conducted on the metal bonding layer; a remelting strengthening layer and a micro-pit texture are formed on the surface of the metal bonding layer; and forming a ceramic layer on the surface of the metal bonding layer to obtain the thermal barrier coating. According to the high-performance thermal barrier coating and the preparation method thereof, the structure morphology and the surface compactness of the metal bonding layer are regulated and controlled through the pulsed electron beam irradiation technology, and the micro-pit texture is constructed through the laser etching technology so that the contact area of the metal bonding ...

Data center project management method and system based on AR + BIM technology

The invention provides a data center project management method and system based on an AR + BIM technology, and the method comprises the steps: S1, building an original model of a data center; s2, building a data center construction model; S3, performing construction pre-marking; S4, arranging a cabinet system and a wire duct system by a constructor; S5, checking and accepting the cabinet system and the wire duct system by a supervisor through a BIM model display module in mobile equipment, and entering the next step after the checking and accepting are qualified; and S6, maintaining and managing the cabinet system and the trunking system through a BIM model display module in the mobile equipment by maintenance and management personnel. According to the method, marking can be more visual in a virtual-real combination mode, repeated measurement is not needed, cooperation of multiple persons and repeated communication confirmation are not needed, and the marking efficiency is greatly improved ...

Non-deslagging peanut-based plant milk and preparation method thereof

The invention discloses residue-free peanut-based plant milk and a preparation method thereof, and the residue-free peanut-based plant milk comprises the following components in percentage by weight: 3-10% of peanuts, 2-8% of white granulated sugar, 0.1-1% of a stabilizer, 0.01-0.05% of an antioxidant, 0.01-0.1% of a pH regulator and the balance of purified water. The method comprises the following steps: S1, peanut selection: selecting white sand or sea flower peanuts as raw materials, and removing red skins and impurities; s2, soaking the peanuts, namely soaking or cooking the peanuts without red skins and impurities; s3, grinding the peanuts into thick liquid: peeling and soaking the peanuts, adding a proper amount of purified water at 70-80 DEG C and an antioxidant, and grinding to obtain peanut thick liquid; s4, performing high-pressure homogenization: performing high-pressure homogenization on the peanut pulp; s5, dissolving materials: adding white granulated sugar, a stabilizer and ...

Post-mixing type flow mixer based on self-oscillation

The post-mixing type flow mixer comprises a shell and a sealing cover detachably installed at the top end of the shell, a circular groove allowing a water injection pipe to be fixedly arranged is formed in the center of the top end of the sealing cover, and a circular-truncated-cone-shaped protrusion used for forming self-oscillation is constructed at the bottom end in the shell. And a supporting frame is fixedly arranged at the top in the water injection pipe, a transmission shaft is rotationally arranged in the supporting frame, a spiral blade arranged in the water injection pipe is fixedly mounted in the middle of the outer edge face of the transmission shaft, and a mounting base is fixedly welded to one end of the transmission shaft. According to the post-mixing type flow mixer based on self-excited oscillation, self-excited oscillation is matched with hydraulic drive stirring, so that grinding materials and water flow can be mixed in the conveying process, preparation in advance is ...

Method, device, recording medium and system for predicting service life of power equipment

The invention belongs to the technical field of equipment operation management, and discloses a method for predicting the service life of power equipment, which is characterized in that the long-term accumulated aging effect of key parts in the equipment can be simulated in a laboratory in a short time by adjusting environmental parameters, and the service life corresponding to the specific environmental parameters is found; by comparing the mechanical property index under each service life with a set threshold value, whether the passed service life reaches the service life of the component or not can be accurately predicted, so that the equipment service life predicted in a short time has an actual reference value. The invention further provides a set of device for realizing the method, a set of non-transient readable recording medium and a system comprising the medium, the program can be called through a processing circuit to execute the method, and the non-transient readable recording ...

Device, system and method for monitoring discharge port of mine crushing station

The invention discloses a device, system and method for monitoring a discharge port of a mine crushing station, and the device comprises an image collection module which is used for collecting an original image representing the panoramic environment state of the discharge port of the crushing station in real time; the vehicle detection module is used for diagnosing whether a mine car is performing unloading operation at the current unloading port or not through the extracted image features according to the original image; and the unloading opening empty and full detection module is used for determining the material position and boundary by extracting the material features in the original image, and based on the material position and boundary, the current material empty and full state of the unloading opening is diagnosed. The self-driving mine car can be assisted to complete the process of unattended unloading operation.

Active real-time balance constraint-based main and distribution network collaborative optimization scheduling method

The invention discloses a main and distribution network collaborative optimization scheduling method based on active real-time balance constraint. The method comprises the following steps: constructing a main and distribution network active real-time balance constraint scheduling model; the target function of the scheduling model comprises a scheduling decision target and an operation target, the scheduling decision target is the minimum planned power purchase cost, and the operation target comprises the minimum new energy power abandoning cost, the minimum controllable load scheduling cost and the minimum standby real-time calling cost; constraint conditions of the scheduling model comprise a frequency full response process constraint, an operation security constraint and a standby constraint; the frequency full response process constraints comprise the constraint that new energy participates in active real-time balance full response, the constraint that a thermal power generating unit ...

Cassava flour nutritional rice and preparation method thereof

The invention belongs to the technical field of tapioca flour nutritional rice preparation, and particularly relates to tapioca flour nutritional rice and a preparation method thereof.The tapioca flour nutritional rice comprises, by mass, 20-40 parts of tapioca flour, 15-30 parts of black rice, 40-60 parts of sticky rice, 5-15 parts of Thailand fragrant rice, 8-17 parts of coix seeds, 2-6 parts of lucid ganoderma, 1-5 parts of ginseng and 3-5 parts of food additives; the preparation method of the tapioca flour nutritional rice comprises the following steps: S1, respectively washing the black rice, the glutinous rice and the Thai fragrant rice, pouring the black rice, the glutinous rice and the Thai fragrant rice together, soaking the black rice, the glutinous rice and the Thai fragrant rice for 30-40 minutes, mixing the coix seeds, the lucid ganoderma and the ginseng, and crushing the mixture into fine granular nutritional powder. The cassava nutritional rice has the advantages that the ...

Grating scanning angle detection method and system based on photodiode

The invention provides a raster scanning angle detection method and system based on a photodiode, and the method comprises the steps: carrying out the conversion of a to-be-detected optical signal through a photodiode, carrying out the filtering, amplitude clamping and analog-to-digital conversion of the converted electric signal, and obtaining a digital signal code value of the photodiode; and generating a signal acquisition waveform curve based on the digital signal code value, searching any two continuous adjacent wave crests which are located in the same period and are greater than a preset threshold value, and calculating a raster scanning angle when diffraction of the micromirror occurs based on the interval time of the two wave crests. According to the invention, the peak searching detection is carried out in the signal acquisition waveform curve of the digital electric signal, and then the raster scanning angle when the micro-mirror generates diffraction is calculated according ...

Keratin BD-8 as well as preparation method, pharmaceutical composition and application thereof

The invention belongs to the technical field of medicines, and discloses keratin BD-8 as well as a preparation method, a pharmaceutical composition and application thereof. In particular to keratin BD-8, a nucleic acid molecule for coding the keratin BD-8, an expression vector containing the nucleic acid molecule, a host cell containing the expression vector or genome integrated with the nucleic acid molecule, a preparation method of the keratin BD-8, a pharmaceutical composition containing the keratin BD-8, and a preparation method of the keratin BD-8. The invention also discloses application of the keratin BD-8, the nucleic acid molecule, the expression vector, the host cell or the pharmaceutical composition in preparation of antipyretic and analgesic, cough-relieving and phlegm-eliminating, anticonvulsion, antiepilepsy, blood pressure-reducing, anti-inflammatory and antiviral drugs.

System for mooring vessel and vessel

The invention provides a system for mooring a ship and the ship, and relates to the technical field of ship equipment, the system comprises a shipborne fixing piece, a mooring connecting piece and a mooring cable; wherein the shipborne fixing piece is an assembly fixedly arranged on a ship; a first preformed hole and a plurality of second preformed holes are formed in the mooring connecting piece, the shape of the first preformed hole is matched with that of the shipborne fixing piece, and the mooring connecting piece is arranged on the shipborne fixing piece in a sleeving mode through the first preformed hole; the second reserved hole is used for being connected with one end of a mooring cable, and the other end of the mooring cable is used for being connected with a mooring pile on a wharf. By applying the system provided by the invention, a user can stably berth the ship at the wharf, and the system is simple in structure, relatively low in cost and good in feasibility.

Foundation-foundation-tower structure system anti-seismic performance analysis method

A foundation-foundation-tower structure system anti-seismic performance analysis method comprises the steps that a foundation, a tower foundation and a tower structure serve as analysis objects, a finite element model of a foundation-foundation-tower structure system is constructed, seismic waves are input into the finite element model, and the energy absorption coefficient of the foundation-foundation-tower structure system is calculated. According to the design, the anti-seismic performance of the whole foundation-foundation-tower structure system is evaluated according to the energy absorption coefficient, the influence of the foundation, the tower foundation and the tower structure on the anti-seismic performance of the tower structure is comprehensively considered, and the dynamic response condition of the tower structure under the earthquake action can be reflected more truly and accurately.

Method for heat treatment of steel product, steel product and bearing ring

The invention provides a heat treatment method for a steel product, which comprises the following steps: step 1), preheating the steel product at a first temperature and/or pre-permeating the steel product at least in a nitrogen-containing furnace atmosphere for a first time; (2) the steel product which is preheated and/or pre-permeated at least in the nitrogen-containing furnace atmosphere is subjected to strong carburization at the second temperature for the second time; (3) the steel product subjected to strong carburization is subjected to carbonitriding at a third temperature for a third time; wherein the second temperature is higher than the first temperature and the third temperature. The invention also provides a steel product and a bearing ring.

Method for improving strength of IN625 alloy annular forge piece

The invention discloses a method for improving the strength of an IN625 alloy annular forge piece. The method comprises the steps of upsetting, punching, trestle chambering, pre-rolling, finish rolling, low-temperature bulging and the like. According to the method, grains are refined through high-temperature blank making (including the upsetting punching procedure and the trestle chambering procedure) and large deformation forging; low-temperature rolling and small-deformation forging are adopted to keep crystal grains not growing; after rolling, the work hardening effect is improved through low-temperature bulging, the purpose of improving the strength of the IN625 material forge piece is achieved through the method, and the IN625 alloy annular forge piece with the good grain size and mechanical property is obtained.

Preparation method of Pickering emulsion, embedding and delivering method of bioactive substance and food 3D printing method

The invention discloses a Pickering emulsion preparation method, a bioactive substance embedding and delivering method and a food 3D printing method, and the method comprises the following steps: S10, dissolving alcohol-soluble protein in a mixed solution of ethanol and water, then adding polyphenol, and uniformly mixing to obtain a protein-polyphenol dispersion solution; s20, adding water into the protein-polyphenol dispersion liquid, uniformly mixing, and concentrating to obtain an intermediate; and S30, uniformly mixing the intermediate with edible oil, dispersing and emulsifying to obtain the Pickering emulsion. The stable Pickering high internal phase emulsion is prepared by using a food-grade material, protein and polyphenol as emulsifiers and adopting a one-step emulsification method, the prepared high internal phase emulsion overcomes the defect that the high internal phase emulsion cannot be stabilized by single protein, no surfactant needs to be added, and the preparation method ...

Intelligent material receiving device adaptive to computerized flat knitting machine

The invention discloses an intelligent material receiving device matched with a computerized flat knitting machine, and relates to the technical field of knitting machine.The intelligent material receiving device comprises an overturning clamping device, a rotating shaft guiding device and a lifting transferring device, when a clamping plate in the overturning clamping device clamps woven cloth, an overturning motor drives an overturning synchronous belt wheel set to be connected with an overturning shaft to rotate, and the rotating shaft guiding device is connected with the lifting transferring device; the rotating shaft guide device is driven by the linear motor to rotate to drive the clamping plate to rotate by an angle to form woven fabric overlapping, and when woven fabric receiving is carried out, through woven fabric overlapping, pressing receiving by means of self gravity, friction force in the middle of the woven fabric is reduced, the situation of roll loosening and roll disengaging ...

Cassava MeChlD gene as well as silencing system and application thereof

The invention provides a cassava MeChlD gene. The nucleotide sequence of the cassava MeChlD gene is shown as SEQ ID NO: 1. The invention further provides a silent segment selected from the cassava MeGRXC3 gene and application of the silent segment. The MeChlD gene is a key gene in the photosynthesis process of cassava, and can influence the synthesis of chlorophyll of cassava leaves so as to influence the net photosynthetic rate of the leaves. The MeChlD gene encodes a magnesium ion chelating enzyme subunit D, has very high homology with rubber tree HbChlD and castor RcChlD, is expressed in cassava leaves in an up-regulated manner, is positioned on chloroplast, can promote the growth of prokaryotic expression recombinant bacteria, interacts with MeChlM and MePrxQ, and participates in photosynthesis. The gene is silenced in cassava by using a gene silencing VIGS technology, so that the total chlorophyll content of cassava plant leaves can be obviously reduced, the leaves are degreased, the ...

Underground extremely low frequency signal penetration propagation model construction method based on finite element

The invention discloses an underground extremely-low-frequency signal penetration propagation model construction method based on finite elements, and relates to the technical field of underground pipeline robot non-acoustic detection and tracing localization. According to the method, the orientation of a target is identified and estimated by using vector electromagnetic signals detected by an electromagnetic sensor based on polarization characteristics of a target electromagnetic field; and the underground pipeline environment model is optimized to obtain the law of the electromagnetic signal, and the target is tracked through the detected signal characteristics.

Dry cleaning method and system for gas compressor

The invention provides a gas compressor dry cleaning method which comprises the following steps: opening a replacement valve of a dry cleaning tank, and replacing gas in the dry cleaning tank with nitrogen; loading nut shells into the hopper, and leaking the nut shells into the dry cleaning tank; according to the technical scheme, the method at least comprises the following steps that the adjusting valve is opened, nitrogen is pumped into the dry cleaning tank, the coal gas inlet valve is opened, and a mixture of the nitrogen and the nut shells is guided into the coal gas compressor to conduct dry cleaning on the blades of the coal gas compressor, and the technical scheme at least has the beneficial effects that the blades of the coal gas compressor are cleaned through the nut shells and the nitrogen; blades of the coal compressor are cleaner, and the coal gas compression effect is better; when the method is adopted to clean the gas compressor, the problem of shutdown of the gas compressor ...

Alternating current and direct current multiplexing power converter and control method thereof

According to the technical scheme, the alternating current and direct current multiplexing power converter comprises a switch module, a plurality of ports, a direct current bus capacitor and a control analysis module; each port is provided with a switch; one end of the switch module is connected with the DC bus capacitor, and the other end is connected with the switch of each port; one end of each port is connected with a power supply or a load, and the other end is connected with a switch of the port; when the switch configured on any port is closed, the switches on the other ports are disconnected; one side of the DC bus capacitor is grounded, and the other side is connected with the switch module for energy exchange; and the control analysis module is connected with the switch and the switch module of each port through a control line, and generates driving signals of the switch module and the switch based on a power supply or a load connected with each port. According to the invention ...

FQ-PCR detection method for porcine acute diarrhea syndrome coronavirus

The invention discloses a porcine acute diarrhea syndrome coronavirus FQ-PCR detection method, and belongs to the technical field of porcine comprehensive coronavirus detection.The FQ-PCR detection method comprises the steps of virus RNA extraction, standard substance preparation and fluorescent quantitative PCR reaction condition optimization, and optimal qPCR reaction conditions are obtained. Compared with a conventional RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection method, the SYBRGreenI real-time fluorescent quantitative PCR detection method which is established by taking a PDCoVN gene as a target gene, has the advantages that the time of gel electrophoresis is saved, a sample can be conveniently and quickly detected, the detection accuracy is high, the detection time is short, the detection time is short, and the detection efficiency is high. According to the present invention, the results of the clinical sample detection and the conventional RT-PCR detection are ...

Electric power communication cable winding device

The utility model relates to the technical field of electric power communication and discloses an electric power communication cable winding device which comprises a base and a rotating handle rod, universal wheels are fixedly connected to the lower surface of the base, and a first supporting seat and a second supporting seat are fixedly connected to the left side and the right side of the upper surface of the base respectively. Scroll shafts are inserted in the middle of the right side face of the first supporting seat and the middle of the left side face of the second supporting seat, and an electric winding device is arranged in the second supporting seat. According to the electric power communication cable winding device, through the arrangement of the motor and the fixing hook, limitation on rotation of the winding shaft is achieved, the situation of rotation is avoided, the cable is prevented from being scattered again, through the arrangement of the electric winding device, the cable ...

Wild plant seed sub-database calculation process and system

The invention relates to a calculation process and system for wild plant seed database division, and the method comprises the steps: firstly, determining the seed germination experiment times and the distribution times, the seed germination experiment times represent the germination experiment times required by wild plant seeds, and the distribution times represent the scientific research times required by the wild plant seeds; determining the total number of wild plant seeds for seed germination experiments and scientific research according to the number of seed germination experiments, the number of distribution times and the total number of the wild plant seeds in the wild plant seed bank to obtain the number of flowing seeds, and setting the number of the flowing seeds as the seed storage number of the short-term bank; and taking the remaining seeds in the wild plant seed bank as the quantity of the long-term banks. According to the method, the wild plant seeds in the wild seed bank ...

Substation on-site progress identification method based on improved Mask-RCNN

A transformer station on-site progress identification method based on an improved Mask-RCNN comprises the following steps: inputting collected transformer station power equipment and building images into an improved Mask-RCNN network model, extracting image features through a CNN network, then integrating the image features through an improved EC module to obtain a feature map, filtering ROI through an RPN network, and finally obtaining the on-site progress of a transformer station. Secondly, unifying the size of a feature map by adopting a region-of-interest alignment layer, performing binary classification, frame regression and Mask mask in a full connection layer to generate a binary mask image, and establishing a multi-task loss function of the binary mask image; and after a global optimal solution of the multi-task loss function is obtained, substituting the global optimal solution and the calculated weight matrix into an image processing target function, iterating for multiple times ...

Development machine deslagging belt damage detection method and system, equipment and storage medium

The invention discloses a heading machine deslagging belt damage detection method and system, equipment and a storage medium, the method adopts a MaskRCNN network to construct a damage identification model for belt damage detection, through a multi-task joint training mode, a single deep learning model can complete belt defect detection and defect segmentation tasks at the same time, and the detection efficiency is improved. The damage detection result comprises the number of the damage, classification confidence, a position bounding box and a pixel region corresponding to the segmented damage. Moreover, in the model training process, a grouping convolution module in transverse dense connection is adopted to replace a 3 * 3 convolution layer forming a residual module in the ResNet50 skeleton network, the multi-scale feature extraction capability of the model can be improved on a finer-grained level through grouping convolution, dense connection is used in the grouping convolution, feature ...

Constant-temperature protection box for portable metering detection equipment

The invention discloses a constant temperature protection box for portable metering detection equipment, and relates to the technical field of power distribution networks, the constant temperature protection box comprises a box body and an upper cover, and the upper cover is connected with one side of the box body; a display screen is arranged outside the box body, and a controller is arranged inside the box body; a storage battery cavity used for installing a storage battery and a metering detection equipment cavity used for installing metering detection equipment are arranged in the box body. A first groove is formed in the inner wall of the storage battery cavity, and a second groove and a third groove are formed in the inner wall of the metering detection equipment cavity; a heating plate is arranged in the second groove; a first refrigeration sheet and a second refrigeration sheet are arranged in the first groove and the third groove; a first temperature sensor is arranged in the storage ...

High-altitude electrified bolt dismounting and mounting operation platform and control system thereof

The invention relates to the technical field of hot-line work of high-voltage equipment, in particular to a high-altitude hot-line bolt disassembly and assembly work platform and a control system thereof. According to the scheme, after the lifting arm is moved to a working area through the lower platform controller, a to-be-disassembled bolt or a bolt hole is recognized through the collection module, the distance between the operation tool and the to-be-disassembled bolt or the bolt hole is collected, and the upper platform controller controls the mechanical arm and the operation tool according to recognition and distance information; the operation tool is accurately aligned with the bolt to be disassembled or assembled or a bolt hole, and then the operation tool is controlled to disassemble and assemble the bolt. Compared with existing manual operation, the control system achieves full-process automatic control over the operation platform, the safety and reliability of the whole operation ...

Comprehensive performance evaluation method, system and equipment for intelligent management and control application platform

The invention discloses a comprehensive performance evaluation method for an intelligent management and control application platform. The method comprises the following steps: constructing an evaluation index system of comprehensive performance of the intelligent management and control application platform; establishing an evaluation set for evaluating the comprehensive performance of the intelligent management and control application platform, and establishing a fuzzy judgment matrix for the comprehensive performance of the intelligent management and control application platform according to the evaluation set; determining the weight of the comprehensive performance evaluation index of the intelligent management and control application platform by using a CRITIC method; constructing a membership function of the comprehensive performance of the intelligent management and control application platform by using a set pair analysis principle, and calculating the relevancy of the comprehensive ...

Kit for detecting porcine rotavirus and detection method

The present invention discloses a porcine rotavirus detection kit and a detection method, the porcine rotavirus detection kit comprises a kit body, the top surface of the kit body is provided with a sample adding hole and a test cavity, the test cavity is internally provided with a gold label pad, two ends of the gold label pad are bonded with cotton heads, the test cavity is internally provided with a movable frame, the inner wall of the movable frame is provided with a sleeve head, and the sleeve head is provided with a sleeve head. The connecting end of the sleeve head is in threaded connection with a pressing rod, the pressing rod abuts against the top face of the cotton head, a spring is arranged on the top face of the sleeve head, a sampling head is arranged in the sample adding hole, and the surface of the sampling head is sleeved with a sample pipe, so that a gold mark pad of the kit can be manually replaced, an existing one-time washing kit is changed, the kit can be recycled, ...

Device and method for guaranteeing stability of tower foundation

The invention discloses a device and method for guaranteeing the stability of a tower foundation. The device comprises the tower foundation, a cast-in-place pile, a stretching mechanism and a monitoring system. The monitoring system comprises a displacement sensor, a pressure sensor, a telemetering water level gauge and a computer; the tower foundation comprises a precast pile and a steel beam, the top of the precast pile is connected with the bottom of the tower, the bottom of the precast pile is connected with the top of the steel beam, displacement sensors are arranged on two sides of the top of the steel beam, a pressure sensor is arranged at the bottom of the steel beam, and a telemetering water level gauge is arranged on the end face of the steel beam. The first cast-in-place pile and the second cast-in-place pile are located in the middle and on the side of the tower foundation respectively, rails are arranged on the tops of the cast-in-place piles, and a pull ring is arranged on ...

AC/DC universal non-PWM control port equipment and control method thereof

The invention provides AC/DC universal non-PWM control port equipment and a control method thereof. The AC/DC universal non-PWM control port equipment comprises a diode uncontrolled rectifier module, a switch module, a DC bus capacitor and a control analysis module, the input end of the diode uncontrolled rectifier module is electrically connected with a power supply; the output end of the diode uncontrolled rectifier module is electrically connected with a plurality of groups of switch modules which are connected in series; the output end of the diode uncontrolled rectifier module outputs corresponding voltage according to output requirements; the plurality of groups of switch modules are respectively connected in parallel with a direct-current bus capacitor; and the control analysis module detects the capacitor voltage of the direct current bus in real time, and adjusts the driving signals of the plurality of switch modules according to the characteristics of the input voltage and the ...

Surface mine area intrusion monitoring system and method

The embodiment of the invention relates to the technical field of mining area operation monitoring, and provides a surface mine area intrusion monitoring system and method.The system comprises a mine car communication terminal, a roadside end and a center cloud end, and the mine car communication terminal obtains legal mine car driving information and sends the legal mine car driving information to the roadside end; the roadside end collects and recognizes dynamic targets in a monitoring area, illegal invasion targets are recognized in combination with legal mine car driving information, illegal invasion target information is obtained, and the center cloud stores the illegal invasion target information. According to the embodiment of the invention, the dynamic target in the monitoring area is identified based on the legal mine car driving information, so that the illegal invasion target information is obtained, and accurate information of illegal invasion targets can be obtained in quantity ...

Environment-friendly construction roadbed road pipeline construction equipment

The invention discloses environment-friendly construction roadbed road pipeline construction equipment which comprises an omni-directional moving vehicle, an adjustable lifting component is installed on the omni-directional moving vehicle, an adjustable extending component is correspondingly installed at the output end of the adjustable lifting component, a clamping component is correspondingly assembled at the output end of the adjustable extending component, and a pipeline body is installed on the clamping component. The whole equipment can be rapidly transferred and moved by means of the omni-directional moving vehicle, control is convenient, the pipeline body can be synchronously linked to slide up and down by means of the adjustable lifting component, the construction height of the pipeline body can be conveniently and dynamically adjusted according to different installation environments, flexibility is high, the adjustable interval is large, and the construction efficiency is high ...

Power distribution network multi-resource multi-stage operation method for coping with natural disasters and human attacks

The invention discloses a power distribution network multi-resource multi-stage operation method for coping with natural disasters and human attacks, which takes a high-risk small-probability event that an attacker initiates hostile attacks while the attacker is still after the natural disasters as a background, and considers multiple types of resources such as a gas turbine, SESS, MESS, RC and NR and a coupling relationship thereof. Dividing the operation process of the power distribution network into five stages according to the time difference between natural disasters and human attacks; under the background of power network-traffic network coupling, in combination with the influence of schedulable resources and traffic flow dynamic change characteristics in each stage on a mobile energy storage moving process and a repair personnel repair process, establishing an optimal scheduling model in each stage of the power distribution network; and converting the model into a five-layer mixed ...

Active power distribution network frequency safety assessment method based on IWO optimized BiLSTM

An active power distribution network frequency safety assessment method based on IWO optimization BiLSTM comprises the following steps: S1, obtaining a plurality of electrical characteristic quantities from disturbance points of an active power distribution network, and analyzing and extracting electrical characteristic quantities strongly related to active power distribution network frequency safety by using a Spearman correlation coefficient; s2, inputting electrical characteristic quantity data strongly related to the frequency safety of the active power distribution network into the BiLSTM model, and performing iterative optimization on parameters in the BiLSTM model by using an invasive weed optimization algorithm; and S3, evaluating the frequency safety state of the active power distribution network by using the optimized BiLSTM model. The active power distribution network frequency safety evaluation method can quickly realize active power distribution network frequency safety evaluation ...