24results about How to "The method is simple and reliable" patented technology

The invention belongs to the field of preparation analysis, and discloses a method for establishing an HPLC (High Performance Liquid Chromatography) fingerprint spectrum of detoxification and hematogenesis granules. According to the invention, a method of combining the HPLC fingerprint spectrum and the chemical mode of the detoxification and hematogenesis granules is established, the contents of the deacetylasperuloside, the rosmarinic acid, the scutellarin, the luteolin, the apigenin and the kaempferol in the detoxification and hematogenesis granules are detected at the same time, and a comprehensive quality evaluation model of the detoxification and hematogenesis granules with different batch numbers is established, so that the analysis result is comprehensive and objective; the method is simple, convenient, reliable, good in repeatability, accurate, stable and high in sensitivity, the multi-component content determination method provides scientific support for quality supervision of the Zhuang medicine preparation detoxification and hematopoiesis granules, and the method can be used for comprehensive quality evaluation and control of the detoxification and hematopoiesis granules. Therefore, the production stability of product quality and the safety and effectiveness of clinical medication are ensured.

The invention discloses a method for repairing creep damage of a nickel-based superalloy for a gas turbine blade, relates to the field of creep damage repairing, and is used for repairing a repaired part, the creep of the part to be repaired is before the end of a third creep stage, and the part to be repaired is the gas turbine blade made of the nickel-based superalloy Mar-M247. Comprising the following steps that S1, a to-be-repaired part is subjected to hot isostatic pressing treatment; s2, the to-be-repaired part subjected to hot isostatic pressing treatment is subjected to solution treatment; and S3, the to-be-repaired part subjected to solution treatment is sequentially subjected to high-temperature aging treatment and low-temperature aging treatment, and repairing of the creep damage of the to-be-repaired part is completed. Through hot isostatic pressing, solution treatment and two times of aging treatment, the damaged structure of the creep damaged alloy is recovered to a uniform cubic form, and the creep property is recovered to be close to or even beyond the original level.

The invention relates to the technical field of petroleum equipment and engineering machinery, and provides a system and method for automatically adjusting the inclination angle of a well drilling and workover two-layer operating platform, the system comprises a derrick and a two-layer operating platform rotationally connected with the derrick, and further comprises a rope winding system, and the rope winding system comprises a steel rope, a pulley block, a movable pulley and a second fixed pulley; the two ends of the steel rope are fixed to the top of the derrick and the top of the two-layer operation table respectively, and the steel rope sequentially winds around the second fixed pulley, the pulley block, the movable pulley and the pulley block from the fixing point of the top of the derrick and is finally fixed to the fixing point of the top of the two-layer operation table. A tensioning device is further arranged on one side of the derrick and fixedly connected with a transmission device through a first fixed pulley, and the other end of the transmission device is fixedly connected with a movable pulley. A tilt angle sensor is mounted on the second-layer operation table; the system further comprises a driller control system. The structure is compact, the method is simple and reliable, and an operator can operate in a driller room or a driller box centralized control position.

The application discloses a positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing iron phosphate, a carbon source, a sodium source and water to prepare a slurry; the mixed iron phosphate contains phosphate and pyrophosphate or phosphate and dihydrogen phosphate; the carbon source contains citric acid; the prepared slurry is grinded to obtain a fine slurry; the fine slurry is sprayed and dried to obtain a solid precursor; and the solid precursor is sintered to obtain the positive electrode material. By controlling the reaction parameters, the mixed iron phosphate containing pyrophosphate or dihydrogen phosphate is synthesized, the amount of citric acid in the subsequent process is reduced, the pore generation rate is reduced, the material compaction density is improved, the method is simple and reliable, and the application prospect is good. The prepared positive electrode material has high specific capacity and high compaction density, and is suitable for preparing a positive electrode of a sodium ion battery.

The invention relates to the technical field of biology, in particular to a quality control method for evaluating forensic case sample extraction and amplification. The invention provides a quality control product which can be used for forensic detection material extraction and amplification quality control, the quality control product is plasmids respectively containing EQCS small fragments and EQCL large fragments, the quality control product is applied to forensic detection material extraction and detection quality control, the method is simple and reliable, the compatibility with an existing detection kit is high, and the quality control product has wide application prospects.

The present invention discloses a method for selecting a grinding device for treating polymer injection discharge, which includes the following steps: data collection, investigating and understanding the commonly used tool types, the properties of discharge, and the commonly used discharge flow rate; simulation calculation, using simulation software and tool models to calculate the working conditions of the grinding tools under all working conditions and collect the results; verification and verification, according to actual production requirements and working conditions, determining the type and structure of the grinding tools, selecting multiple groups of grinding tools that can meet the grinding requirements, and conducting on-site tests to select grinding tools that meet the wear rate requirements. This is to solve the current problems of excessive wear and erosion of grinding tools in the discharge treatment process.

The utility model relates to the field of glove box door plates, in particular to an automobile glove box door plate structure which comprises a box sleeve, rotating shafts are rotationally connected to the front portion and the rear portion of the lower portion of the front face of an inner cavity of the box sleeve through bearings, torsion springs are fixedly connected to the surfaces of the rotating shafts in a sleeved mode, and arc-shaped grooves are formed in the front portion and the rear portion of the surface of the box sleeve. A limiting block is slidably connected to the inner side of the arc-shaped groove, an arc-shaped connecting rod is bolted to the right side of the limiting block, a box door is bolted to the inner side of the rotating shaft, and the front side and the rear side of the box door are both bolted to the other end of the arc-shaped connecting rod. Through the box sleeve, the rotating shaft, the torsion spring, the arc-shaped groove, the limiting block, the arc-shaped connecting rod and the like, articles in the automobile glove box can be conveniently taken and placed under the dark condition, the limiting block extrudes the induction pressing block by opening the box door, and the mode that a lighting lamp is connected with an automobile power supply access is convenient and reliable; and the illuminating lamp can be turned on and turned off in time.

The invention provides a photoetching liquid, a long-life photoetching electroluminescent device and a preparation method thereof, and the photoetching liquid comprises modified quantum dots, acrylic acid modified epoxy resin, a photoetching solvent and an initiator; the modified quantum dots comprise quantum dots and modified ligands modified on the surfaces of the quantum dots, and the modified ligands can be in reaction connection with the acrylic acid modified epoxy resin during polymerization reaction.

The present invention discloses a method and system for multi-robot anti-collision, belonging to the technical field of multi-robot cooperative control. For at least two robots, each robot is equipped with a set of wireless ad hoc network communication equipment; calculation is performed on the robot end to obtain the robot's own target speed, and the anti-collision speed is calculated according to the distance with other robots in the network, and the target speeds of other robots in the network are obtained and each adjustment coefficient is determined according to their distance; the robot's own target speed, the anti-collision speed, and the adjustment speed vectors of other robots are added to calculate the final target speed of the robot; each robot in the network calculates its own final target speed and runs according to its own final target speed. The present invention can realize fast and effective transmission of information between robots, the method is simple and reliable, and can adapt to various complex formations and any number of robots.

The invention discloses a dielectric film testing method based on ellipsometry and ultraviolet visible spectrum mutual calibration, which comprises the following steps: firstly, fitting an ellipsometry spectrum to obtain initial values of a refractive index and an extinction coefficient, comparing with a normal extinction coefficient dispersion model, and determining an abnormal wave band; secondly, fitting the transmitted spectrum, and intercepting the refractive index and extinction coefficient of the transmitted spectrum corresponding to the abnormal wave band of the ellipsometer; then calculating a weighting factor and a translation factor, and calibrating a refractive index and an extinction coefficient of a transmission spectrum in an abnormal wave band; and finally, correcting the ellipsometric spectrum of the abnormal wave band, and re-fitting to obtain the calibrated refractive index and extinction coefficient. According to the dielectric film testing method based on ellipsometry and ultraviolet visible spectrum mutual calibration, the result of the ultraviolet visible spectrum is applied to internally mark the ellipsometry spectrum of a specific wave band, accurate fitting of the refractive index and the thickness is achieved, and therefore the dielectric film detection precision is improved.

The invention relates to the technical field of conveying belt detection, in particular to a steel wire rope core conveying belt connector positioning and marking system and a positioning and marking method. The speed detection unit is used for detecting the running speed of the conveying belt; the electromagnetic detection array is used for detecting the magnetic flux leakage amount of the conveying belt; the paint spraying system is used for spraying paint on the conveying belt according to the joint lap joint type and length of the conveying belt; and the system control unit receives the running speed and the magnetic flux leakage amount of the conveying belt, obtains the position and the type of the joint according to the magnetic flux leakage amount, and then controls the paint spraying system to run according to the running speed of the conveying belt and the position and the type of the joint. Meanwhile, the invention further discloses a positioning and marking method of the positioning and marking system. Based on the size of the leakage magnetic field, the lap joint type and the joint length of the steel wire rope core conveying belt joint are judged according to the relation between the lap joint mode of the conveying belt joint and the leakage magnetic field, the method is simple and reliable, and the recognition rate is high.

The invention is suitable for the technical field of automobile aerodynamics, and provides a self-adaptive flexible spoiler experimental development method under a yaw working condition, and the method comprises the steps: arranging and driving a flexible spoiler in a wind tunnel; the parameters of the spoiler are optimized with the wind resistance coefficient as the target at the multiple yaw angles; designing a piecewise linear rule controller based on an optimization result; pressure monitoring points are arranged on the two sides of a vehicle body, the regression relation between the pressure difference and the yaw angle is established, and the yaw angle is recognized in real time; developing a self-adaptive resistance reduction optimization program, driving the spoiler to be adjusted to the optimal form in real time according to the identified yaw angle, and verifying the resistance reduction effect of the spoiler; a mathematical method is used for calculating the curved surface shape of the spoiler, and reference is provided for automobile appearance design. Aerodynamic configuration self-adaptive adjustment of the vehicle under the crosswind working condition can be achieved, the wind resistance optimization capacity of the real vehicle in the running process is remarkably improved, and an effective experimental method and design basis are provided for low-wind-resistance development of the vehicle.

The invention discloses an optimal control method for improving the power tracking precision of a hybrid synchronous converter, and belongs to the field of power electronic technology and power system control. The invention provides an improved control strategy based on a series high-pass filter in order to solve the problem of low active power tracking precision caused by steady-state coupling of a voltage synchronization loop in existing hybrid synchronization control. According to the invention, the high-pass filter is connected in series in the voltage synchronization loop, continuous interference of a steady-state power angle to the frequency is blocked by utilizing the direct current blocking and alternating current alternating current characteristics of the high-pass filter, and the power synchronization loop independently dominates the steady-state frequency, so that the steady-state power error is thoroughly eliminated, and zero-static-error tracking is realized. And meanwhile, the response capability of the voltage synchronization loop to transient high-frequency disturbance is reserved, so that the excellent transient damping characteristic of the hybrid synchronization control strategy still exists. In addition, the method is simple in structure, does not need to depend on complex system parameter identification, and has high robustness and engineering adaptability.

This invention relates to a method for refining and classifying coking coal based on petrographic and matrix strength, comprising: determining the petrographic composition of the coking coal; placing the prepared sample in a dry distillation reactor for dry distillation reaction; pulverizing; taking a sample with a weight of M0 and placing it in a type I rotary drum for a rotational experiment, then sieving and recording the weight of coke particles larger than 0.2 mm as M1; calculating the matrix strength I. cb = (M1 / M0)*100%; based on the vitrinite content V and matrix strength I in the coal and petrographic composition. cb This invention enables the detailed classification of coking coal. It can quickly distinguish between coking coal types with similar conventional coal quality indicators and further classify them, providing a reliable basis for coking coal quality evaluation and blending guidance. The method is simple, reliable, low-cost, and timely, making it suitable for coal and coking enterprises and possessing broad application value.

This invention provides an automated monitoring method for vegetation change in open-pit mining areas based on long-term time-series remote sensing data, belonging to the field of remote sensing and geographic information technology. The method includes the following steps: S1. Data acquisition and preprocessing: Acquire all data from the mining area during the study period, and obtain NDVI time-series data through cropping, NDVI calculation, maximum value synthesis, and filtering; S2. Template creation: Based on statistical analysis of the filtered NDVI time-series data, obtain the NDVI values ​​of vegetation and bare soil in the mining area, and generate NDVI templates for different vegetation change trajectory types by combining typical vegetation change patterns in open-pit mining areas; S3. Vegetation change trajectory type classification: Using the NDVI templates as training data, obtain the vegetation change trajectory type for each pixel in the mining area using a DTW-based KNN classification method; This invention can achieve a highly automated monitoring method for vegetation change in open-pit mining areas without sample training or parameter setting.

The invention relates to a power distribution network fault line selection method and system. The method comprises the steps of judging whether a zero sequence voltage value of a neutral point exceeds a preset proportion of a phase voltage value or not according to a preset power distribution network operation regulation; if so, determining that a grounding fault occurs, and triggering a line selection program to record the transient zero-sequence current of each line; decomposing the transient zero sequence current by using variational mode decomposition (VMD) to obtain an intrinsic mode function (IMF) component corresponding to each line; a plurality of IMF components are provided; performing fast Fourier transform (FFT) analysis on the IMF component to obtain a power frequency component in each transient zero-sequence current, and removing the power frequency component to obtain a non-power frequency component of each line; after the non-power-frequency components are smoothed, a correlation coefficient matrix of each line is obtained through calculation; and inputting the correlation coefficient matrix into a K-means clustering algorithm, and obtaining a fault line according to an output clustering result. And the accuracy and efficiency of ground fault line selection are improved.

The invention discloses a storage and calculation integrated signal processing method and system for infrared target detection, and relates to the technical field of low-power-consumption end side intelligent target detection. Comprising the steps that S1, a main control FPGA receives real-time infrared image signals of an upper computer, infrared image preprocessing is conducted through an algorithm model, and a preprocessing result is output to a storage and calculation integrated processing carrier plate; s2, based on the preprocessing result, performing convolution operation by a storage and calculation integrated processing carrier plate to obtain a convolution calculation result; and S3, the master control FPGA summarizes the preprocessing result and the convolution calculation result and feeds back the result to the upper computer. The technical problem that a traditional computing architecture encounters high energy consumption when executing an intelligent algorithm is solved.

The invention provides a material storing and taking system and a material storing and taking method. The embodiment of the invention provides a material storing and taking system which is used for automatically storing and taking materials and comprises a first goods shelf, a second goods shelf, a first transportation assembly and a second transportation assembly. The first conveying assembly can convey materials between the first goods shelf and the second goods shelf. The second conveying assembly can move in the second goods shelf and convey materials. The second goods shelf is provided with a first butt joint position, and the second conveying assembly and the first conveying assembly can be in butt joint at the first butt joint position and used for transferring materials between the second conveying assembly and the first conveying assembly. The embodiment of the invention further provides a material storing and taking method. The guiding assembly transports the materials to the material taking position from the feeding position. The first conveying assembly conveys the materials to the first goods shelf or the first butt joint position. The second conveying assembly receives the materials at the first butt joint position and conveys the materials to the second butt joint position. And the butt joint assembly transports the materials on the second butt joint position to the goods storage position.

This invention relates to a method for calculating the input and output power of a permanent magnet wind turbine after demagnetization, and pertains to the field of permanent magnet wind turbine control technology. The method includes: obtaining the first and second average electromagnetic torques of the permanent magnet wind turbine under rated current, both before and after short-circuit demagnetization, and calculating torque loss; dividing the wind speed range of the generator's operation after short-circuit demagnetization into a first wind speed range and a second wind speed range based on the torque loss; calculating the input and output power of the generator in the first and second wind speed ranges based on the torque loss; concatenating the obtained input and output power to obtain the input and output power curves of the generator across the entire wind speed range after short-circuit demagnetization; and controlling the permanent magnet wind turbine based on the input and output power curves. This invention solves the problem of maximizing the output power of a permanent magnet wind turbine while ensuring reliability, thereby ensuring maximum power generation.

A bridgeless Cuk power factor correction topology circuit and its control strategy are disclosed. The circuit includes an AC voltage source, a filter energy storage module, a bridgeless rectifier module, a power frequency ripple coupling module, a buck filter module, and an equivalent load RL. This circuit uses transistors instead of traditional rectifier bridge diodes, reducing the number of components and solving the problem of high conduction losses in traditional diodes. It also offers advantages such as reduced power consumption and high reliability, improving the efficiency of the Cuk PFC converter. Furthermore, based on the bridgeless Cuk power factor correction topology circuit, this invention proposes a simple and easy-to-implement dead-time control strategy and a zero-crossing control strategy, ensuring the integrity of the inductor freewheeling path. Compared to traditional totem-pole bridgeless PFC converters, it has lower requirements for controller performance and better robustness.

The application relates to a kind of calculation methods of turbine admission end regulating linearity, the difference of the termination value and initial value of the comprehensive valve position instruction in nearly 5min is calculated, the linearity k basic value of the comprehensive valve position interval to which it belongs is obtained according to the comprehensive valve position instruction value at termination and initial k , how to use linearity to evaluate the overall operation characteristics of high regulating valve is given, and abnormality is found in time to guide operation personnel to handle. The method is simple and reliable, high accuracy, strong practicability, which can be used in online monitoring system of thermal power plant and other digital systems, continuously monitors linearity, reduces the monitoring pressure of operation personnel, and improves work efficiency.

The invention discloses a PDA lining confined nano Ti carbon nanotube composite photocatalyst as well as a preparation method and application of the PDA lining confined nano Ti carbon nanotube composite photocatalyst. The carbon nanotube composite photocatalyst comprises uncapped multi-walled carbon nanotubes (MWCNTs) acidized by concentrated nitric acid, an inner cavity of each MWCNTs forms a through channel, and the inner wall of each MWCNTs is covered with an organic lining layer formed by thermocuring of PDA; ti nanoparticles are confined and dispersed between the organic lining layer and the inner wall of the uncapped multi-walled carbon nanotubes (MWCNTs), and are connected with the carbon skeleton through Ti-O-C bonds to obtain the PDA (at) CNTs (at) Ti composite photocatalyst. In practical application, the catalyst shows relatively strong anti-interference capability, can stably operate in a complex water body, and has relatively good reusability and catalytic stability. The method disclosed by the invention has the advantages of simple process, easily available raw materials, high catalytic activity and the like, and particularly has a wide application prospect in the aspects of water treatment and pollutant degradation.

This invention discloses a method for verifying the strength of a deck beam. The method involves: determining the working condition under which the beam experiences the target maximum bending moment based on the vehicle spacing 'a' and the span length 'l' of the deck beam, i.e., determining the number of wheel loads and the position of each wheel; calculating the target maximum bending moment by substituting the parameter 's' characterizing the wheel position into the corresponding formula; comparing the calculated target maximum bending moment with the beam's ultimate bending moment; if the calculated target maximum bending moment is less than the beam's ultimate bending moment, the beam strength meets the design requirements; if the calculated target maximum bending moment is greater than or equal to the beam's ultimate bending moment, the beam strength does not meet the design requirements. The beneficial effects of this invention are: it provides a method for verifying the strength of a deck beam, provides corresponding calculation formulas, and provides a method for determining wheel load working conditions.

The utility model discloses a kind of oil collecting plates, including oil collecting plate body, still including the two-axis reverse gear oil guide groove of installing in the bottom of oil collecting plate body one side and the two-axis gear oil guide groove of installing in the bottom of oil collecting plate body other side;The two-axis reverse gear oil guide groove is arranged by the edge of oil collecting plate body to center inclination, the two-axis gear oil guide groove is arranged by the edge of oil collecting plate body to center inclination.The oil collecting plate provided by the utility model, by setting two-axis reverse gear oil guide groove and two-axis gear oil guide groove collection two-axis reverse gear and two-axis gear oil splashing of oil liquid and the oil liquid collected is transported to bearing, so that roller bearing is fully lubricated, greatly reduce the failure rate of this bearing.The oil collecting plate provided by the utility model, integrally stamping molding, improve the strength and accuracy of component whole, shorten technological process, significantly improve the efficiency of manufacturing and processing, reduce manufacturing cost.