27results about How to "Reduce random error" patented technology

A large model agent generation content quality evaluation method based on double baselines comprises the steps that data generated by human beings is acquired, preprocessing and semantic segmentation are carried out, and data samples after semantic segmentation are formed; performing theme extraction on the data samples after data segmentation to form a theme list; the content of the data forming the theme list is generated through an intelligent agent workflow and the content of the data forming the theme list is directly generated through a large model, and an evaluated sample and a contrast sample are obtained; comparing and scoring the data sample after semantic segmentation, the evaluated sample and the contrast sample; selecting a sorting algorithm to carry out score conversion on the graded and compared samples; and performing statistical verification and result analysis. According to the method, a comprehensive, reliable and efficient solution is provided for quality evaluation of the generation content of the large model agent. The method not only can accurately evaluate the content quality, but also provides powerful support for continuous optimization of an intelligent agent system.

The utility model relates to the technical field of marine benthic organism survey, and discloses a special quantitative survey trawl device for acaudina molpadioides, which comprises a gravity comb-shaped plough and an intercepting net, the intercepting net is connected to the gravity comb-shaped plough, the gravity comb-shaped plough comprises two side baffles which are symmetrically arranged, a gravity shovel plate is welded between the lower ends of the two side baffles, and the gravity shovel plate is connected with the intercepting net. A tension rod is welded between the upper portions of the two side baffles, a fixing rod is welded between the middles of the two side baffles, and three sets of triangular supports are evenly welded between the tension rod and the gravity shovel plate. The problem that the original quantitative survey device for the marine large benthonic animals is not suitable for the acaudina molpadioides due to the limitation of the sampling area and the sampling depth is effectively solved; meanwhile, the trawl mode reduces the randomness error of quantitative survey, improves the survey data acquisition efficiency, and enables the survey statistical data to be more reliable and accurate.

The invention discloses a track height unevenness detection system, a track height unevenness detection method and a track height unevenness measurement calibration method. Comprising a control system, a power supply module, a first three-axis accelerometer, a second three-axis accelerometer, a first pressure sensor, a second pressure sensor and a non-contact displacement detection device. A detection train comprises a train body, a bogie and wheels, and the wheels comprise the front wheel and the rear wheel. The vehicle body is connected with the bogie through a secondary suspension system, and the bogie is connected with the wheels through a primary suspension system; the triaxial accelerometer I and the pressure sensor I are respectively arranged at the top and the bottom of a spring of the front wheel primary suspension system; the triaxial accelerometer II and the pressure sensor II are respectively arranged at the top and the bottom of a spring of the rear wheel primary suspension system; the non-contact displacement detection device is arranged at the position of a center shaft of the bogie. According to the invention, more accurate detection of the irregularity of the track can be realized, and online metering calibration of an original track detection system can be realized.

The invention discloses an intelligent online material corrosion performance testing device and a using method, and belongs to the technical field of material corrosion performance testing, the intelligent online material corrosion performance testing device comprises a base, a reaction tank located at the top of the base, a cover plate covering the top of the reaction tank and a cylinder for controlling the cover plate to lift. Through a material fixing mechanism composed of an upper pressing disc, a hanging rod, an upper limiting groove, a collecting groove, a lower pressing disc, a lower limiting groove and an outer threaded sleeve, multiple sets of materials can be subjected to filling testing at the same time in the testing process, random errors are reduced, overall characteristics of the materials can be obtained easily, and the testing efficiency is improved. In addition, an ultrasonic probe is arranged at the top of the material fixing mechanism and located above the material fixing position, and meanwhile, a rotating mechanism composed of a motor, a first shaft rod, a main gear, a driven gear and a second shaft rod is utilized, so that the ultrasonic probe can be continuously controlled to rotate around the axis of the material in the testing process; and the average corrosion condition of the single surface of the material is continuously tested, so that the tested structure is more accurate.

The application relates to a multi-aperture imaging space remote sensing target positioning optical system and a calibration method, and relates to the field of remote sensing and aerospace imaging optical instruments. The application solves the contradiction between the requirements of a large field of view and high resolution imaging of a traditional single-aperture optical imaging system, and realizes accurate positioning of a target to meet the intelligent requirements of a multi-aperture optical imaging system. The multi-aperture imaging space remote sensing target positioning sub-aperture imaging optical system comprises an electromagnetic vibration mirror, a beam-reducing telescope group, a fast reflection mirror and a rear focusing mirror group. The beam-reducing telescope group and the rear focusing mirror group are connected through the fast reflection mirror, and the light beam is connected with an imaging branch through the electromagnetic vibration mirror. After the imaging light beam passes through the telescope system, the imaging light beam is reflected by the fast reflection mirror and focused on a detector to form an image. The application is also suitable for a mobile platform for fast positioning and high-precision capturing of a dynamic target in the field of industrial precision machining and space remote sensing.

The application discloses a method for obtaining a left ventricular papillary muscle target section and an ultrasonic evaluation method thereof, which comprises obtaining a standard basic section conforming to a guideline, and then determining a corresponding target section and a two-dimensional ultrasonic probe adjustment mode according to a front-lateral or rear-medial papillary muscle type to be imaged and a current standard basic section. Through taking the probe pose when the standard basic section is obtained as a benchmark, the two-dimensional ultrasonic probe is rotated by a specified angle or is directionally tilted under the premise of maintaining an acoustic window unchanged, so that an image of the target section clearly displaying a specific papillary muscle long axis or short axis shape is obtained; the problem of incomplete papillary muscle imaging and distorted shape caused by the fixed section of the conventional two-dimensional ultrasonic is solved, the target section can be repeatedly and stably obtained, and the integrity and accuracy of the papillary muscle ultrasonic imaging are significantly improved.

The invention relates to the technical field of suspension bridge main cables, in particular to a method for erecting a continuous type suspension bridge main cable reference strand with an anti-sliding shear key, the reference strand is made of full-high-precision standard wires, and a continuous full-length type cable manufacturing mode is adopted. Comprising the following steps that S1, starting point mark points and terminal point mark points of all standard wires of a reference cable strand are aligned; s2, shear keys are fixedly installed at the span points of the reference cable strand, and the shear keys are matched with reserved notches of the cable saddle; s3, temporary fixing is conducted on the base line length marking position of the reference cable strand, and the reference cable strand is wound with a wrapping tape; and S4, temporary fixation is removed, the steel wires in the strands freely slide, and after the cable strands are stressed, the standard cable strands are erected with the average length naturally formed after standard wire length self-adaption as the length of the standard cable strands. According to the erecting method, the intra-strand error is effectively reduced, high-precision erecting can be achieved only by aligning the shear keys with the notches on site, sag adjustment is not needed, and the construction efficiency is improved.

The invention provides an automatic micro-column for a Trust test and a method for treating irregular antibody titer in serum. The automatic micro-column for the Trust test is prepared by mixing glycerol and a low-ion medium according to a volume ratio of (1: 5)-(1: 4). According to the automatic microcolumn, the detection sensitivity can be effectively improved, compared with the sensitivity of 1 / 8 of a traditional paper sheet method, the detection sensitivity is improved to 1 / 128, meanwhile, random errors caused by human observation factors to experimental results in the detection process of the paper sheet method can be reduced, and the accuracy and sensitivity of the detection results are improved.

The utility model relates to a chemical experiment instrument field, specifically read the auxiliary device of burette scale, including the clamp, the inner wall between the clamp is provided with burette tube body, one side of the clamp top is provided with the auxiliary observation mechanism, the auxiliary observation mechanism includes the casing, the utility model discloses through the clamp and auxiliary observation mechanism, can make the experimental personnel in the use burette process, guarantee the standard of operation method and reading mode, avoid when using burette, appear the case of looking down and looking up burette scale, thereby avoid the error that appears after looking down and looking up burette scale, and then can improve the accuracy and standardization of experiment operation, can further reduce the labor intensity of the labor of the laboratory personnel, be favorable to the physical and mental health of practical personnel, improve the accuracy of reading, avoid the error of artificial reading, greatly reduce the random error and system error of measurement.

The application discloses a strawberry sugar content efficient nondestructive detection method based on an intelligent algorithm, and comprises the following steps: acquiring a plurality of strawberry spectrum data and sugar content reference values, and dividing the strawberry spectrum data into a training set, a verification set and a test set; performing wavelet denoising and polynomial baseline correction on the spectrum data to obtain preprocessed data; extracting key characteristic wavelengths from the preprocessed data, and constructing an initial SVM model based on the key characteristic wavelengths; optimizing the initial SVM model by using the training set to obtain an optimized SVM model; acquiring target strawberry spectrum data, and inputting the optimized SVM model to obtain a detection result. The application realizes rapid, nondestructive and accurate detection of the sugar content of strawberries, and provides technical support for intelligent development of the strawberry industry.

The invention belongs to the technical field of ship inspection, and particularly relates to a gravity center static detection device and method for an ultra-large ship block, and the device comprises a heavy-load hydraulic lifting system, a pose adjustment platform, a three-axis tilt angle sensor, a pressure sensor, a laser displacement sensor, a weighing module, an ultra-wide band positioning system and other parts. According to the method, a distributed measurement mode is adopted, accurate and controllable oblique supporting force is introduced, the supporting force size, the spatial position and the inclination angle data of all supporting points are synchronously obtained, and the barycentric coordinates of the ship segments in the three-dimensional space are comprehensively solved, so that the problem that the barycentric height of the ultra-large ship segments is difficult to accurately measure is solved. In the whole detection process, ship sections do not need to be suspended or inclined, and static and safe measurement of the three-dimensional gravity center is achieved. The multiple detection devices are arranged in a distributed mode and can flexibly adapt to ship segments of different sizes, system errors and random errors are effectively reduced, and the detection precision is remarkably improved.

The application discloses a method for determining the content of combustible gas in steam. The sample is collected by the drainage gas collection method: the gas collection container filled with distilled water is inverted in the sink, steam is introduced to condense, the original water in the bottle is replaced and discharged by using the condensed water, so that the non-condensable combustible gas is collected at the top of the bottle, and the air is isolated by the water seal. Then, the standardized syringe sampling is carried out: after being cleaned and lubricated for multiple times, the airtight syringe is used to pass through the bottle plug and draw a certain amount of gas under the liquid surface, and is quickly sealed to avoid pollution. Finally, the sample is analyzed by the gas chromatograph, and the content of the combustible gas in the steam is quantitatively calculated based on the calibration curve or the correction factor established based on the known concentration standard sample. The application has the advantages of strong anti-interference, standard operation, good sample representativeness and low cost, and is especially suitable for accurate monitoring of low-concentration combustible gas.

The present invention relates to the technical field of oil and gas field development, and specifically discloses an efficient sampling device and sampling method for gas phase tracers in oil and gas field development. It includes: a delivery pipe, installed on an oil production tree; a first fixed pipe, fixedly connected and connected to the delivery pipe; a first fixed shell, arranged on the first fixed pipe; a second fixed shell, penetrating the first fixed shell and fixedly connected thereto, the second fixed shell is provided with a first through hole connected to the inside of the first fixed shell; a sliding plug, slidably arranged in the second fixed shell, and a spring is installed between the second fixed shell; a tank body, threadedly installed on the second fixed shell; a first sliding column, limitedly slidably arranged in the tank body, the first sliding column is provided with a connecting hole. The present invention connects the connecting hole on the first sliding column with the first through hole on the second fixed shell through the movement of the first sliding column, that is, controls the gas medium to directly enter the tank body to avoid leakage of the gas medium.

The invention discloses a medical image segmentation method and system based on diffusion difference learning, and relates to the technical field of image processing. Comprising the steps of obtaining a medical image data set; inputting the medical image data set into a diffusion generation model taking the class activation graph corresponding to the medical image as a visual priori condition to obtain diffusion semantic noise corresponding to the same medical image and different class labels; obtaining an initial semantic segmentation result according to diffusion differences between diffusion semantic noises corresponding to different categories of labels; carrying out thresholding binarization processing on the initial semantic segmentation result to obtain a plurality of initial segmentation masks of the same medical image; and fusing all the preliminary segmentation masks to obtain a segmentation result set of the medical image. According to the method, the class activation graph is used as visual priori knowledge, the insufficient coverage of the class activation graph is compensated through a condition generation mechanism, and the robustness and integrity of a segmentation result are improved.

The invention discloses a dual-system time synchronization method and device, a storage medium and a program product, and relates to the technical field of data transmission, and the method comprises the steps that a first system obtains timestamp information of data transmission between the first system and a second system, the timestamp information at least comprises a first timestamp and a second timestamp for data transmission from the first system to the second system, and a third timestamp and a fourth timestamp for data transmission response from the second system to the first system, and determining the time delay length between the first system and the second system according to the timestamp information, and sending the first time point and the delay duration of the first system to the second system. The first time point is a time point when the first system transmits the delay duration to the second system in a one-way mode, and the second system carries out time synchronization processing based on the received first time point and the delay duration. According to the invention, the precision of dual-system time synchronization is improved.

The present application relates to the technical field of engine life prediction, in particular to an engine life prediction method based on multi-head attention, which first normalizes the original data of the aero-engine sensor and eliminates redundant features; then realizes time-space double-dimension adaptive weighting through the multi-head attention mechanism, and strengthens the key degradation information; then inputs the weighted data into the long short-term memory network to learn the long-time dependence relationship, and completes the preliminary prediction of the remaining useful life; finally, combining Monte Carlo regularization and kernel density estimation, multiple prediction values are generated and the uncertainty is quantified, and the mean value is taken as the final prediction result. Experimental verification shows that this method effectively highlights the key degradation features, reduces the influence of uncertainty, and significantly improves the prediction performance under single working condition and multiple fault modes, providing reliable data support for preventive maintenance of aero-engines.

The application discloses a kind of Ritchey angle in situ detection method based on laser tracker, and main steps are as follows: (1) set up large aperture plane mirror Ritchey-Common test optical path;(2) collimation method calibrates system main optical axis;(3) calibrates laser interferometer focal point position with target ball and records with tracker;(4) hand-held target ball carries out feature point sampling to the mirror surface and its outer contour of the mirror to be measured and modeling;(5) fit out mirror surface center point of the mirror to be measured, connect the focal point of the interferometer positioned with mirror surface center point as main optical axis, calculate the angle between main optical axis and plane mirror normal, i.e.Ritchey angle.The method of the application can more accurately and objectively measure Ritchey angle, has small dependence on artificial, hardware or software algorithm, can be applied to plane mirror of various shapes, improves positioning precision, and reduces random error.

The invention relates to the technical field of additive manufacturing, in particular to a device and a method for evaluating the crack resistance of an electric arc additive manufacturing material, which can realize related evaluation on the crack resistance in the field of electric arc additive manufacturing. The device is simple in structural design and convenient to operate, the sizes of the base plate and the bottom plate can be flexibly selected according to actual requirements, the crack rate is easy and convenient to calculate, and the crack resistance evaluation result of the electric arc additive manufacturing material is reliable and effective. According to the device, the base plate with the annular groove in the middle is designed, the base plate and the bottom plate are fixed through the bolts, thermal deformation of the base plate caused by heating in the electric arc additive manufacturing process is limited, and meanwhile the restraining degree can be adjusted by adjusting the size parameter proportion of the bottom plate and the base plate.

The present invention discloses a highway congestion prediction method integrating spatiotemporal correlation data. The present invention uses highway gantry system data and toll flow data to calculate traffic flow characteristic parameters such as traffic flow, speed, q / C ratio, clusters the input data with the help of spectral clustering algorithm, uses machine learning algorithm to distinguish the traffic state of clustering results, and integrates each algorithm based on soft voting mechanism to construct a traffic state classification decision model based on crowd intelligence algorithm, introduces confusion matrix to obtain evaluation index to quantitatively evaluate the discrimination effect of the model, inputs predicted future traffic flow characteristic parameters to obtain high-precision traffic state prediction results of road sections in the future, and further predicts whether the road section is likely to be congested. The present invention greatly improves the efficiency of highway operation and management, and can be widely used to solve the problem of highway traffic congestion.

The invention discloses a hardness characterization method based on a magnetostriction mechanism ultrasonic transverse wave resonance method, which realizes nondestructive testing and evaluation of material hardness by utilizing the sensitivity of the hardness of a ferromagnetic material to magnetoacoustic conversion efficiency. The method comprises the following steps: measuring a magnetoacoustic transduction curve under the condition of a stepped bias magnetic field by using a magnetostrictive transverse wave sensor; extracting sensitive characteristic parameters from the curve, and establishing a prediction model between the characteristic parameters and the material hardness; and realizing quantitative lossless characterization of the material hardness based on the prediction model. The method does not need a coupling agent, is good in surface state adaptability, and improves the energy efficiency and measurement stability of the electromagnetic ultrasonic transducer by means of the electromagnetic ultrasonic resonance technology and the stepped bias magnetic field design. The method is suitable for hardness detection of in-service ferromagnetic components, and provides support for evaluation of wear resistance and service life of materials.

The present application provides a dehumidifier and a low-energy operation control method for the dehumidifier, which extracts the load fluctuation information of the inductive load unit when the target dehumidifier switches to energy saving from the historical power consumption data, and then determines the power fluctuation entropy; extracts the reactive power increment of the inductive load unit during the energy saving switching process from the historical power consumption data, and then determines the power consumption loss of the target dehumidifier when switching to energy saving from the reactive power increment and the power fluctuation entropy; determines the utility loss of heat exchange in the heat exchanger unit through the heat exchange information of the heat exchanger unit and the air specific enthalpy at the air inlet and outlet of the target dehumidifier; performs cost coupling on the power consumption loss and the utility loss to obtain the switching cost when the target dehumidifier switches to energy saving, and then performs power configuration on different split dehumidification units when the target dehumidifier switches to energy saving based on the switching cost. The scheme of the present application can realize adaptive compensation of the switching cost during the energy saving switching of the dehumidifier, thereby improving energy efficiency.

The application relates to the technical field of liquid level measurement, in particular to a liquid level measurement data processing method and system based on a liquid level sensor and the liquid level sensor, the method comprising the following steps: S1. constructing a liquid level measurement optical system and collecting liquid level measurement data in real time; S2. obtaining a liquid level measurement noise interference degree evaluation value through processing, comprehensively analyzing a liquid level measurement data demand correction index, and correcting the liquid level measurement data according to the liquid level measurement data demand correction index; and S3. comprehensively analyzing a liquid level measurement data correction effect parameter, evaluating and feeding back the corrected liquid level measurement data, the application can provide a basis for liquid level measurement data correction by providing a liquid level measurement data processing method and system based on a liquid level sensor and the liquid level sensor, the effective data correction can ensure that the liquid level measurement data is more accurate and reliable, and the frequent calibration and maintenance of the liquid level sensor can be reduced.

The invention relates to the technical field of flame image processing and temperature detection, and discloses an in-furnace three-dimensional temperature field distribution detection method based on color flame image processing. The method comprises the following steps: acquiring a color flame image sequence in a furnace, after preprocessing and feature extraction, dividing the space in the furnace into a plurality of sub-regions, and calculating the initial temperature; by monitoring the dynamic characteristics of color fluctuation, brightness change and the like of each sub-region in the image sequence, the influence degree of the dynamic characteristics on the overall temperature field in the furnace is evaluated, and the weight is allocated according to the influence degree. And finally, in combination with the initial temperature value and the weight, a three-dimensional temperature field is reconstructed through a data fusion algorithm. According to the method, dynamic analysis is introduced into temperature measurement, random errors introduced by combustion pulsation are effectively restrained through reliability weighted fusion, and the accuracy and the anti-interference capacity of a temperature field distribution model are improved.

The invention discloses a space object attitude symmetric multi-solution analysis method and related equipment, and relates to the technical field of space object radar data processing, and the method comprises the steps: obtaining an inverse synthetic aperture radar sequence image of a space object, and dividing the sequence image into a plurality of image groups; obtaining an attitude solution set corresponding to each image group; calculating a stability measurement value of each solution in each attitude solution set, wherein the stability measurement value is changed among all image groups; and screening out the solution with the highest stability from all the solutions of all the attitude solution sets as the final true value attitude of the space object. According to the method, the problem that the truth value and the symmetric solution are difficult to distinguish in the prior art is solved, unique and reliable estimation of the attitude of the space object is realized, and interference caused by symmetric multiple solutions is effectively eliminated.

The invention relates to the technical field of communication, and provides a method and a device for evaluating an effective interference distance. The method comprises the following steps: constructing a suppression coefficient expression; performing iterative optimization on the suppression distance between the interference equipment and the target unmanned aerial vehicle according to the suppression coefficient expression so as to determine at least one suppression distance meeting requirements as an optional distance; and determining an average value of all selectable distances obtained by iteration as an interference effective distance. The random error of the suppression distance is iteratively reduced based on the suppression coefficient expression, so that the real capability value of the interference effective distance of the interference equipment is truly and accurately evaluated, and the problem that the execution effect is seriously influenced due to the fact that the real capability value of the interference effective distance cannot be obtained and an interference task cannot be implemented according to the designed steps is solved.

This invention relates to a method, apparatus, and device for anti-angle misjudgment angle measurement based on vortex electromagnetic waves, and relates to the field of radar signal processing technology. The method includes: using a circular array as a transmitter, generating and transmitting multiple modes of vortex electromagnetic waves to illuminate the target, obtaining echo signals; selecting a dual-mode combination, processing the echo signals corresponding to the combination to obtain angle measurement values ​​corresponding to each combination; calculating the error between any two sets of angle measurement values, comparing each error with a preset threshold to determine if angle misjudgment exists; if all errors are within the preset threshold, it is determined that there is no angle misjudgment, and the preset angle measurement value is output as the target angle measurement result; if an error exceeds the preset threshold, it is determined that there is angle misjudgment, and the unaffected measurement values ​​are filtered by the consistency and difference of each set of angle measurement values, and the target angle measurement result is output. This invention can achieve robust, continuous, and accurate measurement of target angles in complex interference environments.

This invention relates to the field of MCU serial communication technology and provides an online real-time calibration method and system for baud rate of slave MCU crystal oscillator deviation. The method includes: sending a preset calibration sequence to the slave device; the calibration sequence includes at least a first calibration byte and a second calibration byte; the slave device receives the calibration sequence and analyzes the pulse width count value of each bit in the first and second calibration bytes; filtering the pulse width count value of each bit in the first and second calibration bytes and then performing a weighted average to generate an average pulse width count value; correcting the frequency calibration value or the baud rate timing compensation value based on the average pulse width count value; achieving this without adding hardware, reducing cost and PCB board routing complexity; and reducing random errors by combining and training multiple different calibration bytes and then taking a weighted average after filtering; the calibration delay is short and highly integrated with the normal communication process; thereby improving communication quality, greatly reducing the bit error rate, and thus improving the user experience.