A5101503682- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Radiation Shielding Materials Analysis
- X-ray Diffraction in Crystallography
- Particle Detector Development and Performance
- Radiomics and Machine Learning in Medical Imaging
- Metaheuristic Optimization Algorithms Research
- Machine Learning and ELM
- 2D Materials and Applications
- Radioactive Decay and Measurement Techniques
- Artificial Immune Systems Applications
- Infrared Thermography in Medicine
- Educational Technology and Assessment
- Radioactivity and Radon Measurements
- Geochemistry and Geologic Mapping
- Neural Networks and Applications
- CCD and CMOS Imaging Sensors
- Anomaly Detection Techniques and Applications
- Electronic and Structural Properties of Oxides
- Network Security and Intrusion Detection
- Luminescence Properties of Advanced Materials
- Traditional Chinese Medicine Studies
Chengdu University of Technology
2013-2024
Chengdu University
2020
Beijing Institute of Technology
2018-2020
An important factor for the high performance of light-harvesting devices is presence surface trappings. Therefore, understanding and controlling carrier recombination organic-inorganic hybrid perovskite critical device design optimization. Here, we report use aluminum zinc oxide (AZO) as anode to construct a p-n junction structure MAPbBr3 nuclear radiation detector. The AZO/MAPbBr3/Au detector can tolerate an electrical field 500 V·cm-1 exhibit very low leakage current ∼9 nA, which 1 order...
Purely organic 4HCB single crystals show a capability of directly detecting <sup>241</sup>Am 5.49 MeV α particles and X-ray imaging under low-dose rate (below 50 μGy<sub>air</sub> s<sup>−1</sup>) exposure conditions.
This paper discusses a new method of background estimation in the energy‐dispersive X‐ray fluorescence (EDXRF) analysis, which is based on Fourier Transform (in this paper, we call it method). Compared with Sensitive Nonlinear Iterative Peak method, has feature FWHM independence. It been proved that can be estimated automatically and accurately by synthesized spectrum spectra from measurement. estimate EDXRF using an tube source. Copyright © 2011 John Wiley & Sons, Ltd.
Summary Class imbalance makes traditional intrusion detection system have low rate (DR) and high false positive (FR) for minority class, which is unsuitable practical needs. In order to improve the DRs reduce FRs of classes, we propose a novel method, combines convolutional neural networks (CNNs) algorithm with threshold modification method based on receiver operating characteristic (ROC) curve. this use CNNs as classifier modify through ROC addition, NSLKDD dataset UNSW‐NB15 been carried...
Abstract Calculation method is a very important basic course of engineering, in the environment engineering education, large number colleges and universities bring calculation methods into category professional compulsory courses. This not only theoretical, but also practical. Therefore, teachers are required to combine two organically. The evaluation teaching quality great practical significance cultivation students optimization curriculum. paper establishes more convenient efficient model...
To overcome the problem of pulse pile-up at high count rates, a digital deconvolution algorithm is used to remove exponential current tails NaI(Tl) detectors, so as obtain unit impulse. Then narrow can be obtained through shaping. The technique thoroughly eliminate influences ballistic deficit and improve traditional shaping systems in both throughput energy resolution. demonstrate this method, spectrum 137Cs radioactive source was measured. When time constant 1.5 μs, yielded 6.99%...
A new digital logarithmic airborne gamma ray spectrometer is designed in this study. The adopts a high-speed and high-accuracy amplifier (LOG114) to amplify the pulse signal logarithmically improve utilization of ADC dynamic range because low-energy has larger gain than high-energy signal. After energy calibration, can clearly distinguish photopeaks at 239, 352, 583 609 keV spectral sections. photopeak resolution 137Cs improves 6.75% from original 7.8%. Furthermore, three photopeaks, namely,...
A toroidal soft x-ray array system for spectrum and intensity measurements on the EXL-50 spherical tokamak is described. Silicon drift detectors digital multichannel analyzers are adopted all 21 channels of array, an average energy resolution 147 eV at 5.89 keV has been achieved count rates over 500 kcps. In total, 20 symmetrically observed in both co- counter-current directions mid-plane with a spatial around 10 cm, remaining one serves as background reference channel. Tungsten emissions...
This paper presents a theoretical study on the design of an X-ray fluorescence (XRF) analyzer. The relative geometric positions analyzer’s source, detector and specimen are emphasized, which impacts analyte’s characteristic counts. formula for intensity was derived. factors (angle distance) were simulated using Monte Carlo Neutron-Particle Transport Code MCNP5. Cu’s peak counts calculated. These model calculations analyzed two types geometry changes. best XRF analyzer had incident angle...
Abstract Compton scattering leads to the incomplete deposition of particle energy and produces a background, which decreases measurement accuracy low-energy rays. The low-background, anti-Compton spectrometer outputs 7-channel time signals through coincidence detector. events can be identified reduced by inverse these with coming from High Purity Germanium (HPGe) Detector. precise-time circuit pulse shape signal detector accurately draw arrival signal. This is key for Compton-suppressed...
The range of natural radioactive α particles in water ZnS(Ag) and the semi-absorbent thickness β plastic scintillators were calculated by theoretical formula used as respectively.The energy deposition curves γ photons with different energies scintillator obtained Monte Carlo simulation, optimal obtained.The preliminary design composite detector was completed.The results show that is 30 μm 1 mm.