22 results about "Energy window" patented technology

The invention belongs to the technical field of charging and discharging control, and particularly relates to an intelligent charging and discharging management method and system for a universal interface of unmanned equipment, and the method comprises the steps: injecting a slope scanning voltage into an interface end part, and calculating an interface tunneling index based on a feedback current mapping sequence; calculating an instability entropy weight in combination with the environment humidity and the interface voltage; determining an admission control current based on the interface tunneling index, the instability entropy weight and the maximum current of the battery; the pressure fluctuation rate is monitored in real time, and the current rising slope is lowered when the pressure fluctuation rate exceeds a disturbance threshold value. According to the method, closed-loop cooperation of the current rising slope and the film layer ablation rate is achieved by sensing the oxidation film microcosmic conduction mechanism and locking the physical instability energy window, the problems of contact ablation and interface damage caused by blind breakdown in the prior art are solved, the interface plugging service life is remarkably prolonged, and the supply safety is remarkably improved.

A radiation dose quantification method and system, the method comprising: detecting, with one or more detectors with respective sensitive volumes, gamma-rays emitted as a result of capture of neutrons by a composition in a subject subjected to an irradiation program, the composition comprising one or more thermal neutron capture agents, the neutrons having been generated by non-elastic collisions between a primary beam of particles and nuclei in the subject, wherein the particles consist of any one or more of protons, deuterons, tritons and heavy ions, the irradiation program comprises at least one period of irradiation with a beam duration that includes beam-on periods and beam-off periods; applying at least one predefined energy window or filter configured to accept only detection events in the one or more detectors resulting from gamma-rays with an energy indicative of selected gamma-rays arising from the capture of thermal neutrons by the one or more thermal neutron capture agents, wherein the thermal neutrons are neutrons with energies below approximately 0.4 eV; applying a timing window configured to reject or ignore detection events in the one or more detectors resulting from at least prompt gamma-rays produced in non-neutron capture events; and determining the radiation dose of neutron radiation received by the subject during the irradiation program from at least the accepted detection events or determining a dose map of the radiation received by the subject from at least the accepted detection events.

The invention discloses a stratum density calculation method and device for variable energy window gamma density logging and a storage medium. The method comprises the steps that response energy spectrums of a gamma density logging instrument in different known stratum environments are obtained; changing the energy window boundary of the response energy spectrum, and obtaining density counts in different energy window ranges; calculating different density counts to obtain apparent density; performing benchmarking screening based on the apparent density and the stratum true density to obtain an optimal energy window combination; repeating the operation in different known stratum environments to record data, and connecting to obtain a stratum environment-energy spectrum-optimal energy window combined database; acquiring a to-be-detected stratum environment response energy spectrum; screening an existing response energy spectrum with the highest similarity with the response energy spectrum to be detected from the recorded response energy spectrums; and querying an optimal energy window boundary combination of the existing response energy spectrum with the highest similarity in the stratum environment-energy spectrum-optimal energy window combination database, and calculating the optimal energy window boundary combination to obtain a final calculation result. The method can improve the accuracy of stratum density calculation.

The application discloses a system and method for pile foundation quality detection, and relates to the technical field of pile foundation quality detection, and solves the problems of difficulty in determining the optimal excitation energy range, deviation of damage quantization criteria, and low reliability of detection results, wherein the application randomly distributes excitation pulses with different energies to different excitation areas, ensures that each energy is excited only once in one area and the same area is not continuously used, combines with environment monitoring and correction during resetting, effectively eliminates the cumulative effect of previous excitation and environmental interference, obtains pure damage increment data, identifies the inflection point of the damage increment-energy curve, takes the inflection point energy as the critical excitation energy of the depth, takes the minimum value and the maximum value of all depths to form an adaptive detection energy window, and fundamentally solves the technical problems of difficulty in determining the excitation energy range and contradiction between detection results of the same pile under different energies.

The embodiment of the invention discloses a plane X-ray imaging detection method and system. The method comprises: irradiating a plurality of regions of a human body with planar X-rays; acquiring energy projection data of a plurality of energy windows of a plurality of areas of the human body by using a photon counting detector; obtaining image information of a corresponding human body area according to the energy projection data of the plurality of energy windows; and splicing the multiple pieces of image information to obtain a detection image. According to the planar X-ray imaging detection method and system disclosed by the embodiment of the invention, abundant detection information can be conveniently and accurately obtained under the combined action of the planar X-ray and the photon counting detector.

The application relates to the technical field of semiconductor device special equipment manufacturing, and discloses a micro-order regulation method and system based on a metastable energy window. The method emits a pulse photon beam with a specific frequency to the surface of a semiconductor target material, so that lattice atoms enter a metastable energy window; the reflection spectrum of the semiconductor target material is collected in real time during the pulse intermittent period, and lattice vibration mode features are extracted; the lattice vibration mode features are compared with preset metastable energy window boundary threshold values, the photon density and the duration of the next pulse photon beam are dynamically adjusted according to the comparison result, and lattice atoms are repaired by short-range atomic rearrangement in the metastable energy window. The scheme limits energy injection to the metastable interval, and blocks the long-range diffusion path of doped atoms.

The application relates to a preview image generation method and a SPECT system scanning control method. The method comprises the following steps: setting a preview image expected signal-to-noise ratio; acquiring initial scanning angle scanning data in a scanning process of an initial scanning angle, wherein the initial scanning angle scanning data comprises at least one data set collected under an energy window, and generating a real-time preview image of the initial scanning angle according to the scanning data; in response to the real-time preview image meeting the preview image expected signal-to-noise ratio, switching the scanning angle, and performing scanning after the scanning angle is switched to acquire scanning data of the switched scanning angle; and generating an updated real-time preview image according to the scanning data of the switched scanning angle. The method can improve the image quality of the preview image reconstructed in the scanning process of the SPECT.

The utility model discloses a microwave window, which relates to the technical field of microwave vacuum devices and comprises an oxygen-free copper waveguide and a ceramic window sheet welded on the inner side of the oxygen-free copper waveguide, an outer annular reserved groove is arranged on the outer side of the oxygen-free copper waveguide, and an inner annular reserved groove is arranged on the inner side of the oxygen-free copper waveguide. The outer annular preformed groove is located on the outer side of the position, where the inner annular preformed groove is formed, of the oxygen-free copper waveguide, the inner side of the outer annular preformed groove is fixedly connected with a first reinforcing ring in a sleeving mode, and the outer side of the oxygen-free copper waveguide is fixedly connected with a second reinforcing ring covering the outer annular preformed groove in a sleeving mode. In addition, the second reinforcing ring is matched with the first reinforcing ring, so that the expansion amount of the oxygen-free copper waveguide can be further reduced, a gap between the ceramic window piece and the oxygen-free copper waveguide at a high temperature is reduced, the brazing quality is improved, and then it is guaranteed that the energy transmission window does not leak air under two or more barometric pressures.

The application discloses a vibration image sleep cycle dynamic analysis method based on a Transformer timing modeling, and comprises the following steps: collecting a video sequence, performing detection and noise evaluation, and obtaining a corrected video sequence; performing target region detection on the corrected video sequence to generate a vibration amplitude time sequence; slicing the vibration amplitude time sequence to construct an energy window sequence; constructing an improved Transformer combined encoder; performing convolution coding on the energy window sequence in a stable pole state space convolution unit and outputting a convolution response sequence; inputting the energy window sequence into an energy conservation attention unit to form a context feature sequence; performing parallel fusion on the convolution response sequence and the context feature sequence to output a timing implicit representation sequence; calculating sleep stage labels and confidence of the timing implicit representation sequence to generate a sleep cycle analysis report. The application realizes vibration image sleep cycle dynamic analysis.

The application provides a frequency offset estimation error correction method for UWB, which comprises the following steps: a receiver performs correlation operation on a preamble and a local template, sets an energy window, extracts a plurality of data in a first window as a first valid interval signal, and slides the window at intervals of a symbol period T_sym to extract a plurality of data in a second window as a second valid interval signal; conjugate multiplication is performed on sampling points at the same index positions of the first and second valid interval signals respectively, and the conjugate multiplication results in all intervals are accumulated to obtain an initial phase difference estimation value; according to a linear segmented CFO estimation and a correction error model, in combination with historical phase difference estimation data, a phase correction factor is introduced to correct the initial phase difference estimation value to obtain a corrected phase difference estimation value; the corrected phase difference estimation value is used to calculate a phase difference radian value by using an atan2 function; and the phase difference radian value is used as a phase rotation step to perform phase compensation on subsequent data.

The invention discloses a tight constraint model correction method based on hybrid functional and defect calibration. According to the method, an initial energy band of a defect-containing supercell is obtained based on a standard PBE functional, and energy band correction is carried out by utilizing a band gap difference value of a defect-free reference unit cell between the PBE functional and an HSE functional. In combination with charge transition energy level and energy window constraint of HSE functional calculation, an extrinsic defect energy band is analyzed and deentangled through wave function locality or projection energy band, the extrinsic defect energy band is integrally translated to transition energy level alignment, and a high-precision calibration energy band is obtained. The initial energy band and the calibration energy band are sequentially put into a graph neural network for preliminary training and continuous training so as to accurately extract tightly bound model parameters. And constructing a device channel Hamiltonian by means of the parameter, and executing quantum transport simulation in cooperation with a non-equilibrium Green Function (NEGF). According to the method, synchronous high-precision correction of the band gap and the defect energy level is realized with relatively low calculation cost, and a reliable scheme is provided for device-level quantum transport simulation of a defect-containing semiconductor system.

This invention relates to a method for analyzing the energy spectrum of alpha particles in mixed radiation fields using a CR-39 track detector based on step-by-step etching and energy attenuation. The method first etches the CR-39 with a potassium hydroxide-ethanol-water (PEW) solution, utilizing the significant differences in the tracks revealed by protons, alpha particles, and heavy ions to effectively distinguish alpha particles. To address the problem of a narrow energy window for alpha particle track revealing, this invention proposes a novel etching and identification method. By placing a series of energy-degrading sheets of varying thicknesses in front of the CR-39, the wide-spectrum alpha particles are attenuated to the optimal detection range in the spatial dimension. Simultaneously, through multiple step-by-step etching sessions of varying durations, the measurement window is broadened in the temporal dimension, allowing for the acquisition of the alpha particle energy spectrum in a short time, ultimately achieving accurate reconstruction of the alpha particle energy spectrum. This invention achieves high-purity identification and accurate measurement of alpha particles across a wide energy spectrum in complex mixed radiation fields, offering advantages such as low cost, ease of operation, and reliable results.

The application relates to a frame synchronization method, device and equipment for BPSK signal demodulation. The method comprises the following steps: obtaining a target receiving signal; when a first waveform of the target receiving signal meets preset waveform width threshold requirements, determining a reference signal parameter based on the target receiving signal, and generating a reference signal according to the reference signal parameter; sliding a correlation window on the target receiving signal, calculating window energy at different positions of the sliding correlation window in combination with the reference signal; the window energy represents a phase correlation degree of a first waveform of the target receiving waveform in the correlation window and a second waveform of the reference signal; when window energy corresponding to a target position meets preset energy conditions, determining a phase flipping point of the target receiving signal according to a phase sample serial number of the target receiving signal at the target position, so as to determine frame synchronization information of the target receiving signal. The method can accurately determine the phase flipping position of the receiving signal, so as to ensure the synchronization performance of the receiver.

Various methods and systems are provided for a method for nuclear medicine (NM) imaging, comprising, acquiring imaging data with at least two energy windows, pre-processing acquired imaging data to separate distributions of scattered photons and peak photons, performing a main iterative reconstruction to reconstruct a corrected imaging using scatter correction, tailing correction, and / or scatter and tailing correction from distributions of scattered photons and peak photons, and outputting the corrected image.

The invention provides modified phenolic resin, a preparation method thereof and an i-line chemical amplification photoresist composition, and relates to the technical field of semiconductor manufacturing. The modified phenolic resin is formed by common protection of hydroxyl of phenolic resin by 1, 4-butanediol divinyl ether and ethyl vinyl ether. The modified phenolic resin is jointly modified by 1, 4-butanediol divinyl ether and ethyl vinyl ether, and a cross-linked network is constructed by utilizing bifunctional groups so as to remarkably improve the heat resistance and the etching resistance and solve the problems of pattern deformation and'edge cutting '; meanwhile, the reaction activity is regulated by utilizing a single functional group, and the crosslinking abrupt property is relieved to broaden an energy window. And through the synergistic effect of the two components, the material has excellent heat resistance and corrosion resistance, wide process window and high resolution, and meets the high-precision microelectronic manufacturing requirements.

The invention relates to the technical field of nuclear medicine imaging, and particularly provides an SPECT image reconstruction method and device applying scattered photons and a medium, and the method comprises the steps: determining an energy window group according to radionuclides, and obtaining an attenuation correction image and a DRR image based on a CT image; performing data acquisition based on the energy window group; inputting the DRR image and all the energy window data into a projection domain scatter correction model to enable the projection domain scatter correction model to output low-noise projection data without scattering photons, and then performing tomographic reconstruction on the low-noise projection data to generate a low-noise tomographic reconstruction image; or performing tomographic reconstruction on each piece of energy window data to obtain a tomographic reconstruction image corresponding to each piece of energy window data, and then inputting the attenuation correction image and all the tomographic reconstruction images into an image domain scatter correction model to enable the image domain scatter correction model to output a low-noise tomographic reconstruction image; the method can effectively improve the application value of the SPECT technology in precision medical treatment and quantitative analysis.

The invention relates to the technical field of nuclear medicine imaging, and particularly provides a crystal detector modeling method and device for SPECT and a medium, and the method comprises the steps: obtaining an ideal system transmission matrix, pinhole position arrangement, nuclide type and energy window of a crystal detector used by a current SPECT system; according to the pinhole position arrangement, the nuclide type and the energy window, extracting a corresponding conversion matrix as an actual conversion matrix from a pre-constructed mapping relation table about the pinhole position arrangement, the nuclide type, the energy window and the conversion matrix; the actual conversion matrix represents the count of each actual detection pixel in a crystal detector used by the current SPECT system when photons are incident to ideal detection pixels in a second ideal detector; calculating an actual system transmission matrix according to the ideal system transmission matrix and the actual conversion matrix; the method can effectively improve the SPECT imaging quality and the diagnosis accuracy.

The invention provides an X-ray parameter determination method and system for air gap defect detection, and belongs to the technical field of air gap defect detection and computer simulation, and the method comprises the steps: constructing a corresponding geometric model and a first X-ray particle source according to a target material; controlling a first X-ray particle source to emit a plurality of photons with different energies to the geometric model, and acquiring first interaction data of each photon and the geometric model through a detector; determining an effective excitation energy window of the X-ray to the target material according to the first interaction data; constructing a second X-ray particle source according to the effective excitation energy window; controlling a second X-ray particle source to emit a plurality of photons with the same energy to the geometric model, and acquiring second interaction data of each photon and the geometric model through the detector; and determining a dose parameter required by the X-ray according to the second interaction data. According to the invention, the problems of low efficiency and safety of air gap defect detection in the prior art can be solved.

This application relates to the field of energy storage configuration optimization technology, and discloses a method and system for energy storage capacity configuration based on multi-timescale coordination. The method includes: acquiring raw load power time series data, separating high-frequency power variation components and low-frequency energy offset components, constructing an initial load characteristic dataset and generating a coupled interactive numerical matrix; determining the coupling state between the high-frequency power variation components and the low-frequency energy offset components, extracting the baseline drift amplitude and instantaneous power ramp-up slope, and generating a joint influence factor sequence; fusing capacity gap and fluctuation synchronization degree to generate a comprehensive power demand sequence; performing multi-timescale power-energy separation to obtain intermediate results of energy storage response power and energy shift capacity; and matching the rated power margin and cumulative energy window of the power system to determine the rated power value and energy capacity value of the energy storage configuration. This application improves the accuracy and adaptability of energy storage configuration in power systems.

The invention discloses a method and a system for measuring the thickness of a casing pipe. The method comprises the following steps: acquiring gamma-ray spectrum data collected by a target detector combination in an array density instrument; wherein the array density instrument is arranged in the cased well and clings to one side of the well wall of the cased well; the target detector combination refers to a detector combination in which the distance between two adjacent detectors is smaller than a preset distance in the array density instrument; dividing the gamma-ray energy spectrum data to obtain a plurality of accumulated gamma counts corresponding to the gamma-ray energy spectrum data; and inputting each accumulated gamma count into a pre-constructed casing thickness multi-window inversion function to obtain the casing thickness of the cased well. According to the method, the gamma-ray energy spectrum data acquired by the two ultra-short-distance detectors are subjected to energy window division, and the divided data are input into the casing thickness multi-window inversion function, so that the calculation influence of a stratum and a cement sheath medium on the casing thickness meter is reduced by using the method, and the casing thickness measurement precision can be effectively improved.

The embodiments of the present disclosure provide a method and device for screening scattering events, a PET system, an electronic device, and a storage medium. The method includes obtaining an absorption depth curve of photons of a detector of the PET system, dividing the detector into a first region and a second region along a depth direction of the detector based on the absorption depth curve; determining a first energy window in the first region to screen scattering events occurred in the scanning target; and determining a plurality of second energy windows in the second region to retain scattering events occurred in the detector. The detector includes a plurality of detector layers, the depth direction of the detector is a direction of the plurality of detector layers away from a scanning target, and the plurality of second energy windows are sequentially widened in the depth direction.

The invention relates to the technical field of information security, and discloses a secure communication system based on a micro base station, which comprises a micro base station cluster, user equipment and integrated pulse coupled oscillator modules. The system performs pulse coupling synchronization through a control channel; when node energy accumulation reaches a fire energy threshold, a fire pulse and an identification pulse sequence are broadcasted, and a receiving node adjusts a phase and accumulates energy to global phase synchronization; collecting a neighbor identifier pulse sequence in a local pre-firing energy window, and constructing a local topology fingerprint vector; information is extracted from the firing sequence interval, the final phase deviation and the local topology fingerprint vector, and a shared key is used for symmetrically encrypting and decrypting main radio frequency channel data; and when environment disturbance or abnormal pulse is detected, synchronization is restarted, and a key is derived again, so that dynamic refreshing is realized. And the user equipment participates in synchronous generation of a consistent key after monitoring a control channel capture pulse. The system does not need a traditional key exchange protocol, and is suitable for a low-power-consumption dense deployment scene.