20results about How to "Repeatable" patented technology

This invention relates to the field of demonstration teaching aids, and more particularly to a stepped drive device, comprising a fixed frame, a track assembly mounted on the fixed frame, a trolley mounted on the track assembly, and a sensing device and a speed detection device mounted on the outside of the track assembly; a support fixedly mounted below the fixed frame, and a stepped permanent magnet assembly and a magnetic field transition unit mounted on the inside of the support for driving the trolley to move along the track assembly; the stepped permanent magnet assembly includes a first gradient magnetic field and a second gradient magnetic field arranged sequentially along the direction of trolley movement, both of which are composed of multiple permanent magnets of the same specification, and in a single gradient magnetic field, the number of permanent magnets stacked along the direction perpendicular to the fixed frame increases in a stepped manner; the magnetic field transition unit includes a magnetically adjustable electromagnet disposed between the two gradient magnetic fields; and a speed detection device is mounted at the end of the track assembly, thereby realizing real-time monitoring and demonstration of the trolley's movement state in the stepped changing magnetic field.

This invention provides a method and system for testing the electromagnetic radiation immunity of components, relating to the field of electromagnetic immunity testing technology. The invention sets a range for the electromagnetic frequency and amplitude of the interference signal, generating multiple particles characterizing the interference signal within this range. Through iterative particle swarm analysis, it rapidly collects highly sensitive sample points that cause functional abnormalities in components during electromagnetic interference testing. By clustering these highly sensitive samples, it locates the electromagnetic interference sensitive range of the target component. Compared to full-band scanning and fixed-point scanning methods for electromagnetic interference testing, this invention enables automated and quantitative extraction of the electromagnetic sensitivity range, reducing subjective bias from manual location and improving analytical consistency and repeatability. Furthermore, by focusing on highly sensitive frequency bands and field strength ranges, it optimizes the test path, reduces redundant scanning points, and significantly improves the efficiency of electromagnetic interference testing.

The invention discloses a frame-level network packet loss simulation method, device and equipment based on receiving end buffer time length and bandwidth correction and a storage medium, and relates to the technical field of video coding, decoding and transmission, and the method comprises the steps: obtaining the receiving end buffer time length, the network available bandwidth and a video frame split data packet; resolving the basic probability of a video frame corresponding to a data packet which cannot arrive in the split data packets of the video frame based on the time length of the buffer area of the receiving end, and determining the basic probability of a late packet loss frame; correcting the basic probability of the late packet loss frame based on the time length of the buffer area of the receiving end, the available bandwidth of the network and the total data volume of the video frames corresponding to the split data packets of the video frames, and determining the probability of the late packet loss frame after correction; and performing simulation truncation on a data packet in a corresponding target frame based on the late packet loss frame probability to complete frame-level network packet loss simulation based on the duration and bandwidth correction of the buffer area of the receiving end.

The present disclosure provides an automatic tool selection method and system for a blade disc flow channel, and relates to the technical field of computer-aided manufacturing. The method comprises the following steps: based on a three-dimensional geometric model corresponding to the blade disc, determining a hub spline curve and a casing spline curve corresponding to the flow channel, and performing parameterization processing on the two to obtain initial parameters; based on the initial parameters, performing iterative calculation on each hub feature point to obtain a depth range corresponding to the flow channel; based on the three-dimensional geometric model, determining a suction surface curve and a pressure surface curve corresponding to the flow channel; traversing each feature point in the suction surface curve, determining the nearest feature point corresponding to each feature point from the pressure surface curve based on an iterative search algorithm, and based on each feature point and the corresponding nearest feature point, determining a width range corresponding to the flow channel; and based on the depth range and the width range, determining a target tool corresponding to the flow channel. Through the above method, the machining precision and efficiency of the flow channel are improved.

The application discloses a method and device for extracting three-dimensional morphological characteristics of turbulent large-scale structures based on three-dimensional flow field data. Through Taylor's frozen hypothesis, multiple frames of three-dimensional flow fields are spliced, and a three-dimensional flow field with a flow extension of 8H is constructed by spatial averaging of the overlapping area. Based on two-point spatial correlation, the fluctuating velocity correlation coefficient is calculated, a preset threshold is selected to extract the isosurface to determine the complete three-dimensional morphological boundary of the large-scale structure. Then, the longitudinal length, vertical height and spanwise width are quantitatively extracted, and the average inclination angle of the structure is calculated based on the longitudinal delay of the correlation coefficient peak value. The application breaks through the longitudinal range limitation of single measurement, and can objectively and repeatedly quantitatively measure all three-dimensional morphological characteristics of the large-scale structure at one time.

This invention relates to a method for real-time online detection of wastewater indicators. Before detection, a low-concentration water body is injected into the detection chamber to perform micro-dose detection. By observing whether there is a nonlinear shift in the initial response behavior, it is determined whether there is residual response on the inner wall of the detection chamber. If so, a local delayed detection and pre-rinsing operation is performed to suppress interference responses caused by the chemical memory of the detection chamber. After completing the pre-response suppression, a slow-varying physical stimulus process is applied to the wastewater to be tested, stimulating the release of masked pollutants in the wastewater. The pollutant response signals are continuously tracked, and fluctuating behavior is identified. Based on the changing trend of the response curve, a stable response interval is identified as the sampling point for final detection. For cases with superimposed responses from multiple pollutants, the rise rate, fall rate, and tailing characteristics of the response profiles of each indicator are analyzed to identify the physical differences of multiple response signals and perform physical-level decoupling, improving the accuracy of identifying multiple pollutants.

The invention belongs to the technical field of autism screening, and discloses a rapid interactive screening test method for infant autism, which is suitable for Chinese environment infants of 18-36 months old. The method comprises the following steps: determining an adaptive test object, preparing a test, executing an interactive test and scoring according to a sequence that the first three items are fixed and the other items are flexible, adding scores of the nine items, and judging the risk according to the total score. The method can be completed within 5-10 minutes and is adaptive to Chinese culture, equipment is simple, operation is standardized, and the problems that an existing tool is poor in adaptation and low in efficiency are solved; the method is high in accuracy, is suitable for multiple scenes such as communities, can quickly recognize autism risks, and provides support for early intervention of child autism.

This utility model belongs to the field of rail base material testing technology, and provides a calibration rail for laser intelligent testing equipment for welded rail base materials. The calibration rail includes: a calibration rail with scale lines at both ends; and an adjustment mechanism comprising two base plates, each with omnidirectional wheels movably mounted on its bottom and an adjustment frame fixedly mounted on its top. A support plate is movably mounted inside the adjustment frame, and the support plate is connected to the calibration rail by bolts. The calibration rail of this utility model consists of two mutually perpendicular rectangular blocks, replacing the complex curves of the rail, fundamentally solving the problem of inaccurate measurement of complex rail curves. Traditional testing methods suffer from large measurement errors when dealing with complex rail curves because standard measuring tools cannot perfectly fit them. The simple geometry of the calibration rail allows laser testing to more accurately capture dimensional information, greatly improving measurement accuracy.

This invention provides a rapid modeling method and terminal for variable cross-section leaf springs used in light trucks, relating to the field of light truck technology. The method involves calculating the geometric contours of each leaf spring in its extended state, selecting sample points at equal intervals along the length of each leaf spring in its extended state, and calculating the sample point data including coordinates and thickness. The method then calculates the geometric contours of each leaf spring in its free state. Based on the free state of each leaf spring, sample points are reselected, and corresponding sample point data is obtained through interpolation and exported. A leaf spring modeling file and an assembly parameter file are created. The sample point data of each leaf spring in its free state are imported into the leaf spring modeling file, and the leaf spring assembly parameters are imported into the assembly parameter file. The leaf spring toolbox is run to generate the leaf spring model, defining the leaf spring lugs and material properties to create the leaf spring model. This method uses a procedural approach, which can quickly and accurately calculate the sample point data of the variable cross-section leaf spring, improving the efficiency of leaf spring modeling and the accuracy of model creation.

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

This invention belongs to the field of mechanical structure technology, and specifically relates to a method for controlling the assembly angle of a coaxial counter-rotating dual rotor shaft for a helicopter. The method analyzes the structural characteristics of the two rotor shafts and adds angle control markings during the machining and inspection of the rotor shafts and rotor shaft torque transmission gears. During rotor shaft assembly, the assembly angle between the rotor shaft and the rotor shaft torque transmission gear is calculated based on the angle control markings. Then, the assembly position is marked again on the rotor shaft torque transmission gear to ensure that the angles of the two rotor shafts meet the requirements after assembly.

The utility model discloses a stainless steel storage tank turnover device which comprises a supporting plate, one side of the upper surface of the supporting plate is fixedly connected with an outer plate, the outer plate and the supporting plate are in a right angle shape, the side wall of the outer plate is connected with a rubber base in a glued mode, the center of the upper surface of the supporting plate is fixedly connected with a bottom semi-circular ring, and the inner wall of a top semi-circular ring and the inner wall of the bottom semi-circular ring form a complete ring. The annular positions of the inner walls of the top semicircular ring and the bottom semicircular ring are sleeved with a stainless steel storage tank, and a turnover structure is arranged on the lower surface of the supporting plate. When overturning is needed, an overturning structure is arranged at the bottom of the supporting plate, a servo motor of the overturning structure drives a rotating shaft to rotate, a winch is arranged on the other side of the supporting plate to cooperate with overturning, the overturning angle and speed can be accurately controlled, meanwhile, the stability of the overturning process can be ensured through cooperative use of the winch, and safety is further improved; and subsequent welding or hoisting work can be conveniently carried out on the overturned storage tank, so that the welding work can be smoothly carried out, and the device has the advantage of repeatability.

The application discloses a design method of an aero-engine wheel disc simulation piece, and fully considers the influence of the main stress gradient path and the secondary stress gradient path of the wheel disc feature part dangerous area in the three-dimensional space on the fatigue life of the simulation piece in the design process of the simulation piece, greatly improves the prediction accuracy and the stability of the prediction result of the simulation piece on the fatigue life, and automatically forms the gradient path through a search program, and finally obtains the configuration of the simulation piece through optimization design, so that the design method has operability and repeatability, is helpful to the standardization of the simulation piece design, has a brief design process, high design efficiency and strong practicability, and is suitable for wide promotion and application.

The application discloses a composite gel particle plugging agent for plugging steam channeling and preparation and application thereof, and belongs to the technical field of oil field chemistry. The plugging agent has a triple composite structure of "rigid inorganic core-elastic gel shell-oil-soluble surface layer", the elastic gel shell penetrates and is chemically anchored in the porous structure of the core through a crosslinked network, and an organic-inorganic interpenetrating interface is formed. The surface modifier is an oil-soluble polymer. The plugging agent realizes the synergy of rigid support, elastic plugging and flexible selectivity, so that the volume retention rate of the plugging agent is greater than or equal to 85%, the single-particle compressive strength is greater than or equal to 1.5 MPa, and the ratio (selectivity index) of the plugging rate of the water phase channel to the damage rate of the oil phase channel is greater than or equal to 7.0 after the plugging agent is aged for 7 days in a steam environment at 300 DEG C and a salinity of 20*10 4 mg / L, and the technical problems of easy failure, low plugging strength and lack of flexible selectivity of existing plugging agents under extreme high temperature and high salinity are effectively solved.

The application discloses a kind of goaf roof mining fracture delineation quantitative characterization method, belong to mine hydrogeology and water prevention and control engineering technical field, by network parallel electric method CT field monitoring obtains the development height of guide crack zone, carries out similar material physical simulation and carries out gray scale and binary processing to image, extracts void fraction discrete data sequence, establishes the coupling equation including exponential decay base item, multi-peak gaussian item and constant background value, introduces subsection dynamic attenuation coefficient to describe the difference of stress dissipation in different rock strata, continuously revises initial strength at lithology mutation interface, adopts damping least square method to carry out parameter inversion, with root mean square error and correlation coefficient as evaluation index, output characteristic equation for water accumulation evolution prediction and water channel identification.The application has high fitting precision and clear physical meaning, and can provide reliable parameter support for water prevention and control engineering design.

This utility model relates to the field of textile equipment technology, specifically to a rapid testing device for the tensile strength of elastic fabrics. The device includes a frame, a material guiding mechanism, and a loading mechanism. The material guiding mechanism comprises a first and a second set of guide rollers. The loading mechanism includes a loading rod and a linear drive. One end of the linear drive is connected to the frame, and the other end is hinged to the loading rod. A pressure sensor is mounted on the loading rod. Through this design, the linear drive, controlled by a program, can precisely execute pressure loading, pressure holding time control, and unloading actions, completely replacing manual bidirectional tensile testing. This thoroughly solves the problems of inconsistent testing speed and unstable pressure holding time, ensuring completely consistent testing conditions for each test.

The application discloses an evaluation method and device of an electrical function test case, a terminal and a medium, and belongs to the field of automobile electrical function testing. The function strategy traversal evaluation strategy, the fault code evaluation strategy, the configuration code evaluation strategy and the signal traversal evaluation strategy are respectively performed on test case data to be evaluated, and function strategy traversal evaluation scores, configuration code evaluation scores and signal traversal evaluation scores are obtained. A test case comprehensive score is obtained according to the function strategy traversal evaluation scores, the fault code evaluation scores, the configuration code evaluation scores and the signal traversal evaluation scores. A test case evaluation result is obtained by comparing the comprehensive score with a standard threshold value. The method has objectivity, judgeability and repeatability, can avoid different test case qualities caused by different engineer experiences, and ensures test case quality.

This invention discloses a molecular marker for sex identification of Hawaiian snapping shrimp and its application. Specifically, this invention discloses the application of the Hawaiian snapping shrimp sex identification molecular marker or the substance detecting the Hawaiian snapping shrimp sex identification molecular marker in the identification or auxiliary identification of Hawaiian snapping shrimp sex. The Hawaiian snapping shrimp sex identification molecular marker is a DNA fragment with the nucleotide sequence of SEQ ID No. 1, positions 27-318. This invention designs primers for this sex identification molecular marker and provides a method for identifying or auxiliaryly identifying the sex of Hawaiian snapping shrimp. The Hawaiian snapping shrimp sex identification molecular marker and its detection substance of this invention have the advantages of high accuracy, good reproducibility, and simplicity and convenience.

The invention provides a hematoxylon hairy root genetic transformation system taking seeds as receptors, and belongs to the technical field of biology. The invention provides a hematoxylon seed-mediated genetic transformation method. The hematoxylon seed-mediated genetic transformation method comprises the following steps: stripping seed coats of hematoxylon seeds, and performing puncture treatment; mixing an infection solution containing a target gene with the hematoxylon seeds subjected to puncture treatment for infection; and planting the infected seeds to obtain the transgenic hematoxylon. The invention screens and verifies the unique advantages of the seeds as the hematoxylon genetic transformation receptor, establishes a hematoxylon genetic transformation system directly using the complete seeds as the receptor for the first time, and successfully bypasses the key bottleneck of the traditional technology. According to the genetic transformation method, the genetic transformation rate of hematoxylon is remarkably increased, and the genetic transformation rate is 15%; and the genetic transformation rate is stable, and the method has the advantages of high efficiency and repeatability.