11 results about "Total count" patented technology

The invention discloses a Ga-68 activity direct measurement method which comprises the following steps: S1, preparing Ga-68 samples including a measurement sample and a blank sample; s2, establishing a mathematical model of the detection efficiency of the Ga-68 sample, including the detection efficiency epsilon D that double tubes of a single particle conform to D and the detection efficiency epsilon T that three tubes of the single particle conform to T; s3, establishing measurement equations based on the relationship between the measured total count and the mathematical model of the Ga-68 sample detection efficiency, including the measurement equations corresponding to the total detection efficiency epsilon total, D of the sample under the condition that double tubes conform to D and the measurement equations corresponding to the total detection efficiency epsilon total, T of the sample under the condition that three tubes conform to T; and S4, calculating the Ga-68 activity based on the measured sample count and radionuclide detection efficiency. The method provided by the invention meets the requirements of simple and convenient sample preparation, recyclable nuclide and low uncertainty.

The invention provides a dynamic PSD threshold value correction method, device and equipment suitable for digital pulse waveform discrimination, and relates to the technical field of nuclear radiation detection.The method comprises the steps that a current PSD-energy two-dimensional spectrum is obtained through a nuclear radiation detecting instrument, counts in a target energy range in the current PSD-energy two-dimensional spectrum are removed, and the current PSD-energy two-dimensional spectrum is obtained; converting into a one-dimensional PSD spectrum by using a preset formula; determining the position of the maximum peak and the full width at half maximum in the one-dimensional PSD spectrum, determining a PSD threshold value, and resetting the target PSD value range according to the PSD threshold value; and obtaining the target PSD-energy two-dimensional spectrum again, carrying out statistics on the discrimination target ray counting value and the total counting value, and determining a main target ray counting value according to a difference value between the total counting value and the discrimination target ray counting value so as to determine a main target ray counting rate and a discrimination target ray counting rate. By regularly and automatically analyzing the PSD-energy two-dimensional spectrum and dynamically adjusting the PSD threshold value, different particles can be more accurately discriminated, and the particle detection accuracy and efficiency are improved.

The present disclosure relates to a staining reagent combination comprising a reagent A and a reagent B. The staining reagent combination is capable of simultaneously assessing total count of WBC, differential count of WBC and haemoglobin concentration from a biological sample in suspension form. The staining reagent combination is ideal for use in microfluidic platforms due to its high viscosity and lower volume required for measurement. The staining reagent combination is economical, non-toxic, has quick reaction and long working time.

The present invention discloses a radon measurement method based on time-stamped background subtraction, comprising: if there is a previous measurement, then at the end of the previous measurement, the average count per second value before background subtraction and the end time are recorded; otherwise, the average count per second value before background subtraction is recorded as 0, and the end time is the start time of the current measurement; after the current measurement starts, the time is recorded in seconds, and the background count to be subtracted at each time is calculated; after the current measurement ends, the background count to be subtracted calculated at each second of the current measurement is added to obtain a total background count; the total background count of the previous step is subtracted from the total count of the current measurement to obtain a total count after subtraction; the total count after subtraction is divided by the number of seconds of the measurement time, and multiplied by the efficiency coefficient calibrated by the instrument to obtain the actual radon concentration after subtraction. The present invention can directly perform the next measurement in the case of decay interference from the previous measurement, thereby restoring the true result, eliminating the purification waiting time, and improving work efficiency.

The application relates to a method for electron microscopic analysis of helium element distribution with nanoscale resolution, and belongs to the technical field of transmission electron microscope microscopic analysis. The method for electron microscopic analysis of helium element distribution with nanoscale resolution comprises the following steps: pixel point scanning and collection are performed on a region where helium bubbles of a sample to be measured are located, so that an electron energy loss spectrum is obtained; an electron energy loss spectrum data set is obtained; background deduction is performed on the electron energy loss spectrum data set, so that a helium characteristic peak signal spectrum line data set is obtained; a distribution image of helium elements is obtained according to total count intensities of helium characteristic peak signals of data points in the helium characteristic peak signal spectrum line data set; and a distribution image of helium atom density is obtained according to count intensities of data points in the helium characteristic peak signal spectrum line data set within a preset energy range. The analysis method provided by the application can not only realize microscopic analysis of the nanoscale resolution distribution of helium elements in materials, but also can distinguish the distribution difference of helium atom density in different regions.

The application provides a dynamic PSD threshold correction method, device and equipment suitable for digital pulse waveform discrimination, and relates to the technical field of nuclear radiation detection. The method comprises the following steps: obtaining a current PSD-energy two-dimensional spectrum by using a nuclear radiation detection instrument, eliminating counts in a target energy range in the current PSD-energy two-dimensional spectrum, and converting the current PSD-energy two-dimensional spectrum into a one-dimensional PSD spectrum by using a preset formula; determining the position of the maximum peak and the half-height width in the one-dimensional PSD spectrum, determining a PSD threshold, and resetting a target PSD value range according to the PSD threshold; obtaining a target PSD-energy two-dimensional spectrum again, counting a discrimination target ray count value and a total count value, determining a main target ray count value according to the difference between the total count value and the discrimination target ray count value, and determining a main target ray count rate and a discrimination target ray count rate. By periodically and automatically analyzing the PSD-energy two-dimensional spectrum and dynamically adjusting the PSD threshold, the application can more accurately discriminate different particles, and improves the accuracy and efficiency of particle detection.

The embodiments of the present disclosure disclose a method, device, electronic device and medium for positioning spherical marker points in CT images. The method for positioning spherical marker points in CT images includes: obtaining the initial coordinates within the spherical marker area to obtain the spherical marker point; obtaining the cropping size and search layer based on the attributes of the spherical marker point, and the search layer is multiple; performing regional cropping of the marker point based on the coordinate values ​​of two identical planes of the initial coordinates and the cropping size in different search layers to obtain a cropped image; processing the cropped image to obtain the contour information of the cropped image; obtaining a circle based on the contour information; obtaining the center of the marker point based on the sum of the coordinate points within the circle in the x, y and z directions and the total count of the points within the circle to complete the positioning of the marker point. For marker points without a gold mark or with an unfixed gold mark position, their center can be accurately obtained for the purpose of optical position detection.

This invention discloses an adaptive energy calibration method for a Timepix3 detector, belonging to the field of plasma diagnostics. The method includes: acquiring photon events through the detector, where each photon event includes arrival time, coordinates, and energy information; sorting the photon events according to their arrival time to obtain a sequence; mapping the sequence to an empty matrix using a sliding time window method, searching and recording the area and total count of pixel clusters, and then compensating the count value according to a set threshold; classifying pixel clusters by area, summing the count values ​​of each pixel within a cluster to obtain the pixel cluster volume, and plotting a statistical histogram of the pixel cluster volume to form an energy spectrum; identifying energy peaks in each energy spectrum and performing Gaussian fitting, calculating the peak abscissa, and establishing the relationship between pixel cluster volume and actual energy; and completing energy calibration by linearly fitting multiple sets of pixel cluster volume and energy data. This invention reduces the requirements for setting parameters such as radiation source intensity, detector threshold, and exposure time.

The invention belongs to the technical field of nuclear energy development, and particularly relates to a method and system for measuring a ground state pure cross section interfered by an excited state, and the method comprises the steps: carrying out the first measurement of a characteristic gamma ray of a ground state gY generated in a sample, and obtaining the total count Ctotg1 of the full-energy peak of the characteristic gamma ray of the ground state gY; measuring the sample for the second time to obtain the total count Ctotg2 of the full energy peak of the characteristic gamma ray of the ground state gY; substituting the total counts Ctotg1 and Ctotg2 of the all-energy peaks of the characteristic gamma rays of the ground state gY measured twice into a Cg1 and Cg2 calculation formula, and calculating all-energy peak counts Cg1 and Cg2 of the characteristic gamma rays of the ground state gY caused by the process of mY-gY-Z in the total counts of the all-energy peaks of the characteristic gamma rays of the ground state gY measured twice; and the Cg1 and the Ctotg1 are substituted into a pure cross section calculation formula, or the Cg2 and the Ctotg2 are substituted into the pure cross section calculation formula, so that the pure cross section for generating the X (n, b) gY reaction of the ground state gY can be obtained. According to the method, the precise and reliable pure cross section of the ground state reaction X (n, b) gY can be obtained, and the method can be used in multiple scenes.

The invention relates to a low-altitude unmanned aerial vehicle litchi tracking counting method, device and equipment and a medium, and the method comprises the steps: employing a preset enhanced intersection-to-union ratio calculation formula to calculate and determine an enhanced intersection-to-union ratio between a prediction frame and a real frame of a target litchi according to a preset center point Euclidean distance item and an aspect difference item, associating the enhanced intersection-parallel ratio with the fused motion state vector to determine associated data of the target litchi; calling a preset central area detection counting algorithm based on a time threshold value, judging whether the central point of the prediction frame of the target litchi in the associated data is located in a counting area delineated by the first preset coordinate and the second preset coordinate, and synchronously recording the number of staying frames of the target litchi in the counting area, and if the number of the staying frames reaches a preset frame number threshold value, counting the target litchis into a total counting result. According to the invention, frequent ID hopping in a counting task in a low-altitude unmanned aerial vehicle scene can be overcome, and error accumulation of a tracking task is reduced.

The present invention provides a data processing method for drill collar non-elastic gamma gas layer identification based on spectrum analysis, the method comprising the following steps: obtaining a formation element non-elastic gamma standard spectrum of a controlled-source gas layer identification device while drilling and an instrument's own non-elastic gamma standard spectrum; establishing a set of water-saturated and gas-saturated formation models, and obtaining total non-elastic gamma energy spectrum information of the device in gas-saturated and water-saturated formations with different porosities; processing the total non-elastic gamma energy spectrum information, and extracting the instrument's own non-elastic gamma spectrum total count from the total non-elastic gamma energy spectrum information; converting the extracted instrument's own non-elastic gamma spectrum total count, and preparing a gas layer identification plate; obtaining the actual formation total non-elastic gamma energy spectrum recorded by the controlled-source gas layer identification device while drilling, despectrating the actual formation total non-elastic gamma energy spectrum, and obtaining the instrument's own non-elastic gamma spectrum total count; comparing the obtained instrument's own non-elastic gamma spectrum total count with the gas layer identification plate, and performing gas layer identification on the actual formation.