352 results about "Reference standards" patented technology

A system and method for assessing a degree of coupling between an electrode and tissue in a body is provided. Values for first and second components of a complex impedance (e.g., resistance and reactance or impedance magnitude and phase angle) between the electrode and the tissue are obtained. These values are used together with a standardization value indicative of a deviation from a reference standard by a parameter associated with at least one of the body, the electrode and another component of the system to calculate a coupling index that is indicative of a degree of coupling between the electrode and the tissue. The coupling index may be displayed to a clinician in a variety of ways to indicate the degree of coupling to the clinician. The system and method find particular application in ablation of tissue by permitting a clinician to create lesions in the tissue more effectively and safely.

Methods for identifying Quantifiable Internal Reference Standards (QIRS) for immunohistochemistry (IHC). Also disclosed are methods for using QIRS to quantify test antigens in IHC.

An ultrasonic inspection reference standard for composite materials includes a rectangular prism that is manufactured from a polymer resin. The ultrasonic inspection reference standard may be a polymer resin step-wedge reference standard that has similar acoustic properties as prior art fiber-reinforced composite step-wedge reference standards at significantly lower manufacturing cost. A photo-polymer resin reference standard may be created using a stereo lithography process. The polymer resin reference standard may replace a currently used expensive fiber-reinforced composite reference standard. The ultrasonic inspection reference standard manufactured from a polymer resin may be used, for example, for ultrasonic inspection of fiber-reinforced composite parts. The polymer resin reference standard may be used, for example, in the aircraft airframe industry, both commercial and defense.

Ultrasonic measurements of porosity in manufactured parts or materials are calibrated using reference standards in which parallel holes are drilled in the backside of a body of material. The holes simulate voids in a part which attenuate incident ultrasonic energy. The number, size and location of the holes determine the simulated level of porosity that may be used to calibrate an ultrasonic tester. Multiple reference standards representing different levels of porosity can be produced in the form of individual coupons, or in a single body having multiple groups of holes.

An ultrasonic inspection reference standard for a composite material includes a block comprising the composite material. The block further comprises a first plurality of parallel rectangular-shaped channels within the block and a second plurality of parallel rectangular-shaped channels within the block, wherein the second plurality of channels extend at about a ninety degree angle to the first plurality of channels and wherein the second plurality of channels is located on a separate plane as the first plurality of channels.

The invention provides an online particle monitoring system and method based on a beta ray method and a light scattering method. The system and method are used for precisely measuring the concentration of particles in smoke online in real time. The advantages of the beta ray method and the advantages of the light scattering method are combined, the reference standard of a beta ray method measuring result to a light scattering method measuring result is achieved through an internal reference method, and therefore the concentration of the particles in smoke is precisely measured online in real time. The measuring result is not influenced by the size, color, chemical constitution change and other characters of the particles, and the advantages of being high in precision, outputting figures in real time and the like are achieved.

The embodiment of the invention discloses a webpage click condition displaying method and device. The method comprises the following steps that webpage click data records are received, wherein the webpage click data records correspond to click positions of a terminal on a webpage; according to a region unit block corresponding to the webpage click data records, the webpage click conditions are classified and counted for generating a first counting result; the first counting result is converted into drawing data conforming to reference standards; a webpage click condition graph is generated according to the webpage and the drawing data. The method and the device provided by the embodiment have the advantage that the data volume required in the generating process of the webpage click condition graph can be greatly reduced.

The invention discloses an experimental system used for simulating severe accident conditions of the containment of a nuclear power plant and an implementation method thereof to overcome the problem that comprehensive simulation of severe accident conditions of the containment of a nuclear power plant cannot be realized in the prior art. The experimental system comprises an experimental container, a first pressure sensor arranged in the experimental container, a data acquisition system, an exhaust pipeline, an air supply system, a hydrogen supply system, a spray system, an aerosol supply system, a cable combustion product supply system, a water vapor on-line supply system and at least four sampling pipelines, wherein the data acquisition system is connected with the experimental container through multipoint thermocouples; the exhaust pipeline, the air supply system, the hydrogen supply system, the spray system, the aerosol supply system, the cable combustion product supply system, the water vapor on-line supply system and the at least four sampling pipelines are connected with the experimental container; and the aerosol supply system is connected with the spray system. The experimental system provided by the invention has a reasonable structure, can authentically and comprehensively simulate severe accident conditions in the nuclear power plant and carries out hydrogen elimination performance testing on a passive hydrogen recombiner on the basis of simulation results; moreover, testing results approximately represent actual working conditions, so good reference standards are provided for researching and designing of the recombiner.

The invention relates to a method for classification and online defect visual detection of blister drugs on a production line. The method comprises the following steps: S1, acquiring and storing the reference standards of all characteristics of the blister drugs; S2, acquiring images of the blister drugs to be detected; S3, carrying out detection of the different types of blister drugs on the blister drugs to be detected according to the standard threshold values of all the characteristics of the blister drugs; S4, carrying out defect detection of the same type of blister drugs on the blister drugs to be detected according to the standard threshold values of all the characteristics of the blister drugs; S5, obtaining the same type of blister drugs without defects. The method replaces the traditional artificial blister drug quality inspection with a machine vision inspection technology, and has the advantages of being low in labor intensity, not susceptible to subjective factors, high in reliability and detection efficiency, low in loss detecting rate and false detecting rate, and the like.

The invention discloses a hyperspectral remote sensing data vegetation information extraction method. The method comprises in an experiment research zone, synchronously or quasi-synchronously acquiring a hyperspectral remote sensing image and reference standard values of physiological and biochemical parameters of vegetation to be detected, carrying out dimensionality reduction pre-treatment on the hyperspectral remote sensing image to obtain vegetation canopy spectral reflectance data, building an empirical mathematic model of the vegetation canopy spectral reflectance data and the vegetation parameter standard values to obtain a hyperspectral remote sensing estimation method of the vegetation physiological and biochemical parameters, through the empirical mathematic model, acquiring a vegetation parameter estimated value by the vegetation canopy spectral reflectance data obtained by the hyperspectral remote sensing image, carrying out estimation on the parameters of the model by the sample value and carrying out examination on a model precision. Through the hyperspectral remote sensing data, vegetation physiological and biochemical parameter estimation is realized so that the method is convenient and fast, does not influence vegetation growth, is suitable for large-area popularization and has a measurement area of the whole earth range.

The invention discloses an anti-shaking method and an anti-shaking device for photographing and a mobile terminal. The method comprises the following steps of receiving a photograph preview command, and acquiring cache image frames collected by a camera; storing the cache image frames into a full-scale data flow queue and a preview data flow queue; receiving a photographing command input by a user, and determining a cache queue for outputting a photograph image according to a preset photographing mode; when the photographing mode is the anti-shaking delayed mode, selecting a target image frame from the full-scale data flow queue according to the reference standard value of the cache image frames, and using the target image frame as the photograph image for outputting. According to the anti-shaking method for photographing, the cache image frame with the highest image definition of the cache image frames in the full-scale data flow queue is determined to be the photograph image, thus the anti-shaking effect of the terminal during photographing is improved, the success rate of photographing is significantly increased, the ambiguous photograph caused by shaking during photographing is avoided, and the user experience during photographing is enhanced.

The invention relates to the technical field of sports medicine and provides a muscle force assessment method and device and a muscle rehabilitation training tracking and assessment method and system. The muscle force assessment method includes the steps that image collection: ultrasonic equipment is adopted for collecting a muscle contraction image video in the moving process of a patient in real time; image preprocessing: framing is performed on the collected muscle contraction image video, so that interesting image information is extracted and the image contrast is adjusted; motion field extraction: a motion assessment method is adopted for calculating a motion field of every two adjacent frames in the image, and the motion fields represent spatial-temporal changes of an image gray value in the x direction and the y direction; a muscular movement range curve is obtained: a quantized index is extracted from the motion fields, and the muscular movement range curve is calculated in a fitting mode and serves as a reference standard of muscle force assessment. The ultrasonic equipment is used for collecting the muscle image, the muscle assessment method and device are simple and visual, requirements for a doctor and the patient are relatively reduced, and the processes of assessing muscle force are simplified.

A porosity reference standard for ultrasonic inspection of composite materials includes a right prism manufactured from a solid isotropic material and a porosity created within the right prism. The porosity reference standard may be a glass block that encloses a plurality of simulated voids created through laser etching. The porosity reference standard may be manufactured by using a sub surface laser engraving process. By creating a porosity within the glass block, the level of the porosity can be exactly determined and is spatially constant over a desired area within the glass block. The laser-etched porosity reference standard is suitable for, but not limited to, ultrasonic porosity inspection of composite laminate parts, such as wings, empennage and fuselage skins, sub-skin structures, frames stringer, and shear ties, used in the aircraft airframe industry, both commercial and defense.

The invention discloses a compound vacuum gauge calibration system and method, belonging to the technical field of measurement. The compound vacuum gauge calibration system disclosed by the invention comprises a mechanical pump, a molecular pump, a first vacuum valve, a second vacuum valve, a third vacuum valve, a fourth vacuum valve, a fifth vacuum valve, a sixth vacuum valve, a seventh vacuum valve, a vacuum gauge, a capacitance diaphragm gauge, a third vacuum gauge, a calibration chamber, a first small hole, a second small hole and an air source. The invention further discloses a compound vacuum gauge calibration method; a capacitance diaphragm gauge of which the full range is 1000 Torr is adopted as reference standard; the direct comparison method is adopted to realize the calibration within the range of 10<5> to 100 Pa; the expansion method is adopted to realize the calibration within the range of 100 to 10<-3> Pa; and the dynamic flow conductance method is adopted to realize the calibration within the range of 10<-4> to 10<-6> Pa. The compound vacuum gauge calibration system disclosed by the invention has the characteristics of low cost, small weight and size, portability, and the like.

The invention discloses a spatial special-shaped surface curtain wall system construction method. The method comprises the following steps of: carrying out three-dimensional scanning on a constructedcivil engineering project so as to obtain three-dimensional scanning data; obtaining a civil engineering BIM model and a curtain wall BIM model of a spatial special-shaped surface curtain wall system;processing the three-dimensional scanning data and taking the civil engineering BIM model as a reference standard to obtain a variance analysis result; and modifying a design scheme of the spatial special-shaped surface curtain wall system according to the variance analysis result so as to a corresponding modified curtain wall BIM model. According to the method, three-dimensional scanning is directly carried out on civil engineering projects without artificially carrying out buried point measurement at the sites, so that the constructed civil engineering projects can be effectively and accurately measured, correct and intuitional construction variance analysis results can be rapidly obtained, reliable basis is provided for the construction of spatial special-shaped surface curtain wall systems, smooth construction of the spatial special-shaped surface curtain wall systems is ensured, the construction periods and costs are saved and the curtail wall construction efficiency is improved.

The invention discloses a measuring method for the construction depth of an asphalt road surface, comprising the following steps of: starting a computer, a UPS (Uninterrupted Power Supply), a laser device, an encoder and a camera; calibrating the camera; pushing a handcart to move forwards on a road surface to be detected; sending a pulse signal to the computer by the encoder; emitting laser beams by the laser device; receiving a triggering signal sent by the computer, collecting images and sending the images to the computer; sequentially carrying out image de-noising on each image received by the computer and carrying out mass center extraction row by row through a threshold value gravity center method; subtracting a coordinate value of a mass center of each row by a height coordinate value corresponding to a reference standard surface corresponding to the image to obtain a difference value; and calculating a height value of each row in each image by a formula 1 and calculating an arithmetic mean value of all the obtained height values to obtain the construction depth of the asphalt road surface. The measuring method improves the measuring precision of the construction depth and has the advantages of simplicity and flexibility in operation and convenience for calculation.

The invention discloses a method for estimating a safety domain of a track irregularity amplitude in the technical field of track traffic safety. The method comprises the following steps of: establishing a wheel/rail dynamics simulation model; inputting track irregularity data into the wheel/rail dynamics simulation model to obtain derail coefficient, wheel load reduction rate and wheel/rail cross force, and smoothing the derail coefficient; marking the track irregularity data once; performing grid division of the track irregularity data, counting the track irregularity data in grid to obtain dangerous point distribution rate of the grid, and completing secondary marking on the track irregularity data; and training a support vector classifier; and finally testing the trained support vector classifier, if a reference standard is reached, determining that the support vector classifier is available, otherwise, training the support vector classifier again. The method can be used for quantitative evaluation of a geometrical shape of a high-speed railway track on traffic safety.

The invention provides a current transformer error measurement device and measurement method, the device includes a power generator (1), a reference standard (2) and an error tester (3), the power generator (1) generates a large Current AC/DC composite signal or sine half-wave signal, and the generated signal is respectively applied to the measured current transformer (4) and the reference standard device (2); the reference standard device (2) can convert the measured large current signal The AC and DC components in the AC and DC components are accurately converted into small current or small voltage signals, and the small current or small voltage signals are input to the error tester (3) as a reference signal; the error tester (3) outputs the reference standard (2) The reference signal and the measured signal output by the measured current transformer (4) are synchronously sampled, converted and calculated to obtain a measurement result.

The invention provides a characteristic wavelength selecting method for a near infrared spectrum in an ant colony optimization algorithm. The method comprises the following steps: creating a partial least squares analysis model by utilizing all wavelength points of the near infrared spectrum as initial selection equivalent variables of the ant colony optimization algorithm and utilizing the quality or characteristics of a test object as reference standard, re-weighing and calculating to update a pheromone vector according to the predicated mean square error of the model, searching and obtaining the optimal near infrared spectrum wavelength combination through using iterative computations, performing circular computation for a plurality of times, and automatically judging so as to obtain the optimal characteristic wavelength of the near infrared spectrum. The characteristic wavelength selecting method provided by the invention adopts the global search and positive feedback mechanisms of the ant colony optimization algorithm so as to effectively avoid the defects of subjective wavelength selection in the modeling process, so that the model has strong robustness and applicability.

The invention discloses an optical nonlinearity measuring device and a measuring method for nonlinearity thick photonics materials, and belongs to the technical field of nonlinearity photonics materials and nonlinearity photonics measurement. Tophat type laser pulses serve as probe light, a reference standard sample with the suitable thickness is selected according to the thickness of a sample to be measured, the reference standard sample and the sample to be measured are subjected to Z scanning measurement respectively, energy of incident light is adjusted to obtain the same normalization transmittance peak-to-valley values, and a nonlinearity refraction coefficient of the sample to be measured is obtained by data processing. The optical nonlinearity measuring device and the measuring method for nonlinearity thick photonics materials are suitable for nonlinearity photonics materials of which the thicknesses exceed a Rayleigh length.

The present disclosure provides genetically engineered cell lines comprising chromosomally integrated synthetic sequences having predetermined epigenetic modifications, wherein a predetermined epigenetic modification is correlated with a known diagnosis, prognosis or level of sensitivity to a disease treatment. Also provided are kits comprising said epigenetically modified synthetic nucleic acids or cells comprising said epigenetically modified synthetic nucleic acids that can be used as reference standards for predicting responsiveness to therapeutic treatments, diagnosing diseases, or predicting disease prognosis.

A method is disclosed for calibration of a towed line array. In a low frequency band, calibration is performed using an acoustic field observed by reference standard hydrophones. The observations form a model of a complex acoustic field throughout a space occupied by a measurement apparatus. The array sensitivities are computed by comparing output voltages of the array with the acoustic field estimated at the locations occupied by hydrophones of the array. Variations in the acoustic field that cannot be accounted for by free field propagation theory are included in the calculation of array channel sensitivities. The method extends the low frequency limit for the calibration to less than the minimum frequency at which free field propagation conditions can be approximated. Boundary reflections and spatial variations in the acoustic field are recognized. The spatial distribution of acoustic energy is used to provide low frequency calibration with improved precision.

The invention provides a movement contrast system based on three-dimensional motion capture data and actually photographed videos and a method thereof. The contrast system comprises a basic section, a contrast section and a contrast unit. The basic section is a virtual reference file formed in a way that reference persons of standard movements complete the whole set of movements in the specific scene. The contrast section is a demonstration file formed in a way that demonstrators of the standard movements complete the whole set of movements in the field corresponding to the specific scene. The contrast unit is used for displaying the basic section and the contract section under the state of overlapping demonstration so as to evaluate accuracy of the movements. According to the contrast system, the basic section acting as the reference standard is introduced, and the virtual section is attached to the field frames in a matching way with no requirement for field guidance of the third party so that real performance and the standard movements can be visually and accurately contrasted at a monitor side, and the process of movement improvement can be optimized.