Article
Materials Science, Multidisciplinary
Anum Shafiq, S. A. Lone, Tabassum Naz Sindhu, Youssef El Khatib, Qasem M. Al-Mdallal, Taseer Muhammad
Summary: This paper aims to identify an effective statistical distribution for examining COVID-19 mortality rates in Canada and Netherlands in order to model the distribution of COVID-19. The modified Kies Frechet (MKIF) model is an advanced three parameter lifetime distribution with versatile probability functions and attractive features, showing good adaptability to data modeling.
RESULTS IN PHYSICS
(2021)
Article
Mathematics, Applied
Saknarin Channark, Poom Kumam, Juan Martinez-Moreno, Wachirapong Jirakitpuwapat
Summary: A new progressive and iterative approximation method called HSS-LSPIA is proposed in this paper to solve the problems of curves and surfaces approximation. The method includes two iterations with iterative difference vectors, providing an approximate optimal constant and convergence analysis. It is faster than other methods in terms of convergence speed.
Article
Chemistry, Multidisciplinary
Yunhan Yao, Ke Zhang
Summary: In this paper, an improved self-born weighted least square method (ISWLS) is proposed to enhance the stability and resistance to gross errors in geometric error evaluation. By updating the ordinal number information of the independent sets of equations, the influence of gross error data on the solution of the equations is minimized. Experimental results demonstrate the algorithm's strong resistance to gross differences and shorter operation time.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Showkat Ahmad Lone, Sadia Anwar, Tabassum Naz Sindhu, Fahd Jarad
Summary: This study discusses the challenge of estimating the parameters of mixture models from a frequentist perspective. It compares the three frequentist approaches, namely maximum likelihood, ordinary, and weighted least squares, and demonstrates the model's applicability through simulated and real-world data, achieving promising results in terms of enhanced estimation.
RESULTS IN PHYSICS
(2022)
Article
Engineering, Aerospace
Zixuan LI, Xuedao Shu
Summary: This paper investigates the application of X-Ray Diffraction (XRD) method in measuring residual stresses of spun parts. It compares the fitting effects of Ordinary Least Squares (OLS) method and Weighted Least Square (WLS) method, and discusses the relationship between residual stress distributions and workpiece defects and grain structure.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Computer Science, Software Engineering
Yajuan Li, Meng Zhang, Wenbiao Jin, Chongyang Deng
Summary: In this paper, a technique of approximating Bezier curve by the least square polygon (LSP) is proposed. LSP minimizes the integral of approximating errors and provides a closed formula for its vertices, resulting in lower approximation errors compared to existing methods.
Article
Engineering, Electrical & Electronic
Cong-Sheng Huang
Summary: This paper proposes a condition-based parameter identification switching algorithm to improve the accuracy of state-of-charge estimation in lithium-ion batteries by minimizing modeling errors.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Environmental Sciences
Yunsheng Zhang, Chi Zhang, Siyang Chen, Xueye Chen
Summary: The study presents a method for automatically generating 3D regular building facade model from photogrammetric mesh model, which involves contour tracking, topological relationship analysis, component division, and cuboid abstraction. The proposed method is able to derive a regular facade model with a certain accuracy.
Article
Mathematics, Applied
Tahani A. Abushal, Tabassum Naz Sindhu, Showkat Ahmad Lone, Marwa K. H. Hassan, Anum Shafiq
Summary: This study examines the theoretical and practical implications of the 2-component mixture of Shanker model (2-CMSM). The hazard rate function of this proposed model has rising, decreasing, and upside-down bathtub forms. Statistical characteristics of the mixed model are investigated, and appropriate approaches such as maximum likelihood, least squares, and weighted least squares are used to estimate the parameters of the mixture model.
Article
Instruments & Instrumentation
Zi-Yi Gao, Qi-Xiang Chen, Peng Gao, Chun-Lin Huang, Yuan Yuan, He -Ping Tan
Summary: This study investigated the spatiotemporal distribution of global lightning activities and the infrared radiance characteristics of lightning flashes. The results showed that the density and intensity of lightning activities were primarily influenced by climate and geographical factors, with human activities also playing a role. The analysis of probability density functions provided insights for the identification and prediction of lightning flash radiation characteristics.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Chao Li, Ziyu Song, Yi Wang, Yancheng Zhang
Summary: This study proposes a method for counting lily buds based on machine vision. Through color space transformation, threshold segmentation, SVM classification, and ellipse fitting, accurate counting and fitting of lily buds are achieved. Experimental results show that the proposed algorithm performs better than other algorithms.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Computer Science, Software Engineering
Huidi Wang
Summary: The extended LSPIA (ELSPIA) method, which adjusts control points with global and local relaxation parameters, can converge faster to the least square fitting curve and surface even when the collocation matrix is not of full column rank.
Article
Mathematics, Applied
Saknarin Channark, Poom Kumam, Juan Martinez-Moreno, Parin Chaipunya, Wachirapong Jirakitpuwapat
Summary: The GOLSPIA method improves the MLSPIA method by extending it to multidimensional data fitting and using optimal sequences of weights for iterative approximation with memory. It has been proven that a series of data fitting with appropriate weight alternatives converges to the solution of least square fitting, and the convergence rate of the new method is faster than that of the MLSPIA method. Examples and applications in this paper demonstrate the efficiency and effectiveness of the GOLSPIA method.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Min Han, Jiangming Kan, Gongping Yang, Xinghui Li
Summary: In this article, a novel ellipsoid fitting method using a combination of axial distance and Sampson distance is proposed. The method shows higher robustness against outliers and consistently high accuracy in comparison to other representative fitting methods.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Mechanical
Fei Huang, Alexandre Sava, Kondo H. Adjallah, Zhouhang Wang
Summary: This research introduces a data-driven modeling method for estimating the remaining useful life of bearings using a T-S fuzzy inference system. Parameters of the model are identified through subtractive clustering method, and the maximum likelihood method of mixture distribution analysis is proposed for calculating cluster parameters on the time axis. The effectiveness of the proposed method is highlighted through numerical experiments benchmarked against existing methods.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Review
Nuclear Science & Technology
Mohammad Alrwashdeh
ANNALS OF NUCLEAR ENERGY
(2018)
Article
Nanoscience & Nanotechnology
Mohammad Alrwashdeh, Saeed A. Alameri
Article
Nuclear Science & Technology
Mohammad Alrwashdeh, Saeed A. Alameri, Ahmed K. Alkaabi
NUCLEAR SCIENCE AND ENGINEERING
(2020)
Article
Chemistry, Inorganic & Nuclear
Mohammad Alrwashdeh, Saeed Alameri
APPLIED RADIATION AND ISOTOPES
(2019)
Article
Nuclear Science & Technology
Saeed A. Alameri, Mohammad Alrwashdeh
Summary: This study focuses on the preliminary neutronic calculations for a PAHTR design with FLiBe coolant, investigating the effectiveness of IFBA coating on TRISO fuel particles, and conducting parametric studies to achieve specific cycle length and fuel burnup targets. The innovative idea of using IFBA as an additional coating layer throughout the reactor core for reactivity control mechanism is discussed. The Monte Carlo Serpent code is utilized to estimate core reactivity balance and analyze neutron spectrum, peaking factor, and multiplication factor for the 3D PAHTR reactor core at different stages of operation.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Nuclear Science & Technology
Mohammad Alrwashdeh, Saeed A. Alameri
Summary: This study compared the neutronics impact of different cladding materials on the standard APR-1400 reactor A0 fuel assembly, finding that the thermal neutron absorption cross section of different materials affects the production of actinides such as plutonium.
NUCLEAR ENGINEERING AND DESIGN
(2021)
Article
Energy & Fuels
Mohammad Alrwashdeh, Saeed A. Alameri
Summary: This study investigates the potential improvement of accident-tolerant fuels in pressurized water reactors through the enhancement of zirconium fuel-cladding systems, replacement of cladding materials, and alternative fuel forms. The neutronic behavior and properties of silicon carbide and FeCrAl cladding systems are analyzed and compared with a reference Zr fuel-cladding system. The SiC fuel-cladding system exhibits behaviors consistent with conventional Zr systems, providing better economic and safety improvements.
Article
Energy & Fuels
Mohammad Alrwashdeh, Saeed A. Alameri
Summary: This study investigates the effects of an alternative cladding material - chromium coating on reactor fuel performance, including improvements in fuel thermal conductivity.
Article
Materials Science, Multidisciplinary
Nouf T. Alhattawi, Mohammad Alrwashdeh, Saeed A. Alameri, Maitha M. Alaleeli
Summary: This study investigates the potential of using silicon carbide (SiC) and iron-chromium-aluminum (FeCrAl) cladding materials to improve the safety and efficiency of nuclear power plants, particularly in the context of accident tolerant fuel (ATF) technology concepts. The study concludes that SiC is a feasible substitute for conventional zirconium cladding by adjusting design parameters. The findings of this study have practical implications for the safety and efficiency of nuclear power plants.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Multidisciplinary Sciences
Hasan Alnuaimi, Saeed A. Alameri, Khurrum Saleem Chaudri, Mohammad Alrwashdeh
Summary: This study investigates control methods for load following operation (LFO) in APR1400 nuclear reactors. Part strength control element assemblies (PSCEAs) have been identified as a potential solution to maintain axial offset (AO) within the permitted band during LFO. A 3D model of an APR1400 reactor core was developed to simulate different power manoeuvring scenarios and establish effective reactivity control strategies. The results demonstrate that AO can be maintained within the permitted band by utilizing PSCEAs and a (1-6-1-16) or faster manoeuvring strategy was found to be more effective.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Mohammad Alrwashdeh, Saeed A. Alameri
Summary: This study conducted a neutron analysis of a soluble-free-boron APR-1400 reactor core to explore the possibility of extending the fuel life cycle from 18 to 24 months. Homogeneous and heterogeneous fuel enrichment designs were examined, while maintaining the original fuel geometries of the reactor. The results indicate that it is possible to extend the fuel cycle to up to 24 months in both the homogeneous and heterogeneous cores.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Maithah M. Alaleeli, Saeed A. Alameri, Mohammad Alrwashdeh
Summary: This study compares the performance of potential accident-tolerant fuel (ATF) claddings composed of silicon carbide composite and conventional ZIRLO(TM) cladding in a pressurised water reactor. The simulations show that the silicon carbide composite with niobium liner exhibits superior characteristics in terms of neutron spectrum, criticality, and power distribution, performing very similarly to ZIRLO(TM) cladding.
Article
Nuclear Science & Technology
Mohammad Alrwashdeh, Wang Kan
JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE
(2016)
Proceedings Paper
Engineering, Mechanical
Mohammad Alrwashdeh, Yu Jian Kai, Aniseh Abdalla, Wang Kan
PROCEEDINGS OF THE 21ST INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING - 2013, VOL 5
(2014)
Article
Chemistry, Inorganic & Nuclear
R. Galea, K. Moore
Summary: In this study, the solution of 225Ac was standardized using the TDCR method. The counting efficiencies were calculated to be approximately 500% for the NRC TDCR system. The relative uncertainty for the activity concentration was determined to be 0.25%. The measured half-life of 225Ac was found to be consistent with previous measurements.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
N. C. Ramirez, S. M. Collins
Summary: In this paper, the authors determined the half-life of 68Ga using ionisation chambers measurements and HPGe gamma-ray spectrometry. They reviewed the current literature and identified possible causes of inconsistency within the dataset. The findings suggest that addressing these issues could lead to a significant improvement in future evaluations of the half-life.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
C. P. Mano, C. Chapelle, Der Mesrobian Kabakian, H. Paradis, O. Delaune, L. Patryl
Summary: CEA/DAM is developing new beta-gamma measurement systems to enhance the reliability of the Comprehensive Nuclear Test Ban Treaty's verification regime. A new spectral unmixing algorithm for full-spectrum analysis was tested to improve analysis methods for nuclear activities with low statistics.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Junyoung Lee, Geunsub Kim, Hyegang Chang, Sangmin Lee, Sung-Joon Ye
Summary: The study applied the convolution/superposition method to calculate the dose distribution of boron neutron capture therapy and compared it with the Monte Carlo method. The results showed that the C/S method has a fast calculation speed and reasonable accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Victor H. Elvira, Marie-Christine Lepy, Yves Menesguen, Stephanie Melhem
Summary: In this study, a cryogenic electrical-substitution radiometer was utilized for the primary calibration of monochromatic photon beams at a synchrotron facility, in order to determine the intrinsic efficiency and dead layer thickness of an HPGe detector. This calibration method allowed for the calculation of efficiency up to 55 keV, where the active thickness of the detector is not a determining factor. Geometrical efficiency was also determined through measurements of a radioactive source at various distances.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Ali Pashazadeh, Hamid Reza Baghani, Mostafa Robatjazi, Prajit Kadavil
Summary: This study investigated the effect of patch source geometric parameters on the depth dose distribution in skin tissue through Monte Carlo simulation. The results showed that increasing the source-to-skin distance, patch thickness, and patch diameter will reduce the depth dose distribution, with the source-to-skin distance having the most significant impact on dose gradient.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Yueli Song, Fengqun Zhou, Yajuan Hao, Xiaopeng Zhang, Pengfei Ji, Yong Li
Summary: In this study, the cross section values of the 109Ag(n,2n)108mAg reaction at different neutron energies were measured using the activation technique and off-line gamma-ray spectrometry. The results were compared with experimental data, evaluated data from libraries, and theoretical values to validate their accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhongkai Fan, Tao Hu, Xiangming Cai, Ruomei Xie, Haoxuan Li, Fengdi Qin, Shoukang Qiu, Yanliang Tan, Jian Shan
Summary: The high-precision measurement of Rn-220 is crucial for assessing and preventing thoron radiological hazards. By adding a ZnS(Ag)-coated clapboard, the issue of reduced Rn-220 concentrations due to decreased air pressure can be addressed, leading to improved detection efficiency. Experimental and simulation results provide valuable references for establishing the Rn-220 calibration factor.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
R. Han, Z. Chen, Y. Nie, B. Liu, G. Tian, X. Zhang, F. Shi, H. Sun, Z. Zhang, Y. Ding, X. Ruan, J. Ren, S. Zhang
Summary: The leakage neutron spectra of Lead samples were measured using a TOF technique, and MCNP simulations with different nuclear data libraries showed that JENDL-5.0 and JEFF-3.3 libraries have better agreement with experimental data. Differences in spectra mainly stem from variations in neutron reaction channels across the libraries, with ENDF/B-VIII.0 and CENDL-3.2 libraries being overestimated in certain energy ranges.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Nissren Tamam, Maryam Al Huwayz, Z. A. Alrowaili, Norah Alwadai, Khadijah Mohammedsaleh Katubi, Mohammed S. Alqahtani, I. O. Olarinoye, M. S. Al-Buriahi
Summary: This study investigates the radiation shielding properties and radiation protection applications of borotellurite glasses. The results show that the addition of TeO2 can enhance the glass's ability to absorb photons and fast neutrons, and effectively suppress photon buildup. These glasses also exhibit exceptional gamma radiation and fast neutron moderating abilities, making them suitable for designing lead-free, transparent, and efficient radiation protection structures.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
S. Chasapoglou, M. Kokkoris, R. Vlastou, M. Diakaki, V. Michalopoulou, A. Kalamara, G. Gkatis, A. Stamatopoulos, M. Axiotis, S. Harissopulos, A. Lagoyannis, M. I. Savva, T. Vasilopoulou, C. Lederer-Woods, N. Patronis, K. Kaperoni
Summary: This study investigated the accuracy and limitations of theoretical corrections in neutron-induced reactions on isotopically enriched Ge targets. Experimental cross-section measurements were conducted on several reactions using Ge-nat and isotopically enriched Ge targets. The results showed that the methodology using isotopically enriched targets provided accurate results without the need for theoretical corrections.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
P. G. Konstantinidis, G. S. Polymeris, E. Tsoutsoumanos, G. Kitis
Summary: This study investigates an altered version of an existing protocol to study the mechanisms and phenomena of stimulated luminescence. The protocol allows for the examination of recombination mechanisms and trapping parameters of the traps, as well as the observation of potential transitions between two different states.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Quanzhi Yu
Summary: This study obtained the broad neutron spectrum of the Atmospheric Neutron Irradiation Spectrometer (ANIS) through Monte Carlo simulation and provided an analytic expression. By calculating the Single Error Rate (SER) and ratio, the reliability of the ANIS neutron spectrum was evaluated.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
D. Glavic Cindro, M. Korun, T. Petrovic, B. Vodenik, B. Zorko
Summary: In gamma-ray spectrometric measurements, the decision threshold is determined by the observed value of the measurand. However, this dependence restricts its application to measurements with non-expressive indications. To address this issue, a recalculation of the decision thresholds based on the peak widths corresponding to expressive indications is proposed.
APPLIED RADIATION AND ISOTOPES
(2024)
