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Physical Review C 2024年第2期110卷 024309-024309页

作者： Z. X. Zhou D. W. Luo H. Y. Wu Y. Y. Wang Y. F. Niu W. Zhang C. Xu G. S. Li Z. H. Li H. Hua S. Q. Zhang C. Y. Guo X. Q. Li Y. H. Qiang Aman Rohilla J. Lin J. Z. Zhang L. Ni S. Y. Zhang J. G. Wang Y. D. Fang M. Kumar Raju D. Bing W. Q. Zhang H. Huang M. L. Liu F. F. Zeng S. Guo X. H. Zhou School of Physics and State Key Laboratory of Nuclear Physics and Technology Key Laboratory of Nuclear Data Mathematics and Physics Department School of Nuclear Science and Technology School of Physics and Microelectronics Department of Physics

High-spin states of Ga67 have been studied via the Ni58(C12, 3p)Ga67 fusion-evaporation reaction at a beam energy of 50.4 MeV. Three negative-parity bands and three positive-parity bands in Ga67 are established. The observation of one new E3 transition linking the positive-parity π1g9/2 band and negative-parity π2p3/2 band provides evidence of octupole correlations in Ga67. The characteristics of octupole correlations in the Ga67 are discussed in terms of the reflection-asymmetric triaxial particle rotor model and microscopic relativistic mean field + Bardeen-Cooper-Schrieffer model.

关键词： Collective levels Collective models High spin states nuclear shapes and moments nuclear structure & decays Transfer reactions 59 ≤ A ≤ 89

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Perturbative QCD evidence for spin-2 particles in the di-J/ψ resonances

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science Bulletin 2025年

作者： Zhang, Hong-Fei Ma, Yan-Qing Sang, Wen-Long College of Big Data Statistics Guizhou University of Finance and Economics Guiyang550025 China Research Centre of Big-data Corpus & Language Projects School of Foreign Languages Guizhou University of Finance and Economics Guiyang550025 China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing100871 China Center for High Energy Physics Peking University Beijing100871 China Collaborative Innovation Center of Quantum Matter Beijing100871 China School of Physical Science and Technology Southwest University Chongqing400700 China

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Visualizing nonlinear resonance in nanomechanical systems via single-electron tunneling

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Nano Research 2021年第4期14卷 1156-1161页

作者： Xinhe Wang Lin Cong Dong Zhu Zi Yuan Xiaoyang Lin Weisheng Zhao Zaiqiao Bai Wenjie Liang Ximing Sun Guang-Wei Deng Kaili Jiang Fert Beijing Research Institute School of Microelectronics&Beijing Advanced Innovation Centre for Big Data and Brain Computing(BDBC)Beihang UniversityBeijing 100191China State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics and Tsinghua-Foxconn Nanotechnology Research CenterTsinghua UniversityBeijing 100084China Key Laboratory of Quantum Information CASUniversity of Science and Technology of ChinaHefei 230026China Department of Physics Beijing Normal UniversityBeijing 100875China Institute of Physics Chinese Academy of SciencesBeijing 100080China Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor EngineeringTsinghua UniversityBeijing 100084China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

Numerous reports have elucidated the importance of mechanical resonators comprising quantum-dot-embedded carbon nanotubes(CNTs)for studying the effects of single-electron ***,there is a need to investigate the single-electron transport that drives a large amplitude into a nonlinear ***,a CNT hybrid device has been investigated,which comprises a gate-defined quantum dot that is embedded into a mechanical resonator under strong actuation *** Coulomb peak positions synchronously oscillate with the mechanical vibrations,enabling a single-electron Chopper*1 ***,the vibration amplitude of the CNT versus its frequency can be directly visualized via detecting the time-averaged single-electron tunneling *** understand this phenomenon,a general formula is derived for this time-averaged single-electron tunneling current,which agrees well with the experimental *** using this visualization method,a variety of nonlinear motions of a CNT mechanical oscillator have been directly recorded,such as Duffing nonlinearity,parametric resonance,and double-,fractional-,mixed-frequency *** approach opens up burgeoning opportunities for investigating and understanding the nonlinear motion of a nanomechanical system and its interactions with electron transport in quantum regimes.

关键词： carbon nanotube mechanical resonator quantum dot nonlinear coupling

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Discovery of 15 new pulsars at high Galactic Latitudes with FAST

arXiv

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arXiv 2025年

作者： Xu, Xin Dai, Shi Zhi, Qijun Bai, Juntao Berteaud, Joanna Calore, Francesca Clavel, Maïca Zhu, Weiwei Li, Di Zhao, Rushuang Xu, Renxin Qiao, Guojun School of Mathematical Science Guizhou Normal University Guiyang550001 China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal University Guiyang550001 China Australia Telescope National Facility CSIRO Space and Astronomy PO Box 76 EppingNSW1710 Australia Western Sydney University Locked Bag 1797 Penrith South DCNSW2751 Australia School of Physics and Electronic Science Guizhou Normal University Guiyang550001 China Xinjiang Astronomical Observatory Chinese Academy of Sciences Xinjiang Urumqi830011 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China University of Maryland Department of Astronomy College ParkMD20742 United States NASA Goddard Space Flight Center Code 662 GreenbeltMD20771 United States LAPTh CNRS USMB Annecy74940 France Univ. Grenoble Alpes CNRS IPAG Grenoble38000 France National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Department of Astronomy Tsinghua University Beijing100190 China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing100871 China

We present the discovery and timing results of 15 pulsars discovered in a high Galactic latitude survey conducted with the Five-hundred-meter Aperture Spherical Telescope (FAST). The survey targeted a region as close as possible to the Galactic Center, encompassing an area near the Galactic Bulge. The newly discovered pulsars consist of eleven normal pulsars and four millisecond pulsars (MSPs). Among the MSPs, three are identified in binary systems with orbital periods of ∼ 3.1, 4.6 and 12.5 days, respectively. We have successfully obtained coherent timing solutions for three of the normal pulsars (PSRs J1745−0059, J1746−0156 and J1800−0059). Furthermore, within our data set we found that four pulsars (three new and one known) show mode-changing and/or subpulse drifting phenomena. Comparing our discoveries with simulations of the Galactic disk and Bulge MSP populations indicates that these new pulsars are most likely located in the disk. Nonetheless, our discoveries demonstrate that deep surveys at high Galactic latitudes have significant potential to enhance our understanding of the MSP population in the direction of the Bulge. Copyright © 2025, The Authors. All rights reserved.

关键词： Galaxies

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The application of decision tree in the prediction of winning team

The application of decision tree in the prediction of winnin...

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2018 International Conference on Virtual Reality and Intelligent Systems, ICVRIS 2018

作者： Tang, Xiaohu Liu, Zhifeng Li, Taizhao Wu, Wenbin Wei, Zhenhua Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology East China University of Technology Nanchang Jiangxi330013 China Jiangxi Engineering Technology Research Center of Nuclear Geoscience Data Science and System East China University of Technology Nanchang Jiangxi330013 China Information Engineering College East China University of Technology Nanchang Jiangxi330013 China

ISBN: (纸本)9781538680315

Decision tree algorithm is mainly used for analyzing data and *** algorithm is easy to understand and implement, and it is easy to evaluate the model through static *** this paper, the decision tree algorithm is applied to predict the result of Chinese Football Association Super League(CFASL). In this paper, the data of CFASL 2015, 2016 and 2017 seasons are collected. And 'the result of each team's last match', 'compare of teams' ranking in last season', 'the result of last time the two teams played',etc. are selected as features to predict the winner of a CFASL match. The experiments found that 'two teams' performance in their recent matches', 'whether team A has defeated team B as an away team' and 'whether team B has defeated team A as an away team' played a key role in improving the accuracy of predicting. © 2018 IEEE.

关键词： Forecasting

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Current Status and Development Trend Analysis of Neutron Logging in Uranium Mines in China

Current Status and Development Trend Analysis of Neutron Log...

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2021 International Conference on Advances in Optics and Computational sciences, ICAOCS 2021

作者： Liu, Zhifeng Ding, Chenglong Wang, Ruyang Cao, Junwu Jiangxi Engineering Technology Research Center of Nuclear Geoscience Data Science and System East China University of Technology Nanchang Jiangxi330013 China East China University of Technology China 6th Gas Production Plant of Changqing Oilfield China Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology East China University of Technology Nanchang Jiangxi330013 China

Neutron logging is a method of measuring uranium fission neutrons by bombarding uranium in ore beds with neutrons emitted by neutron sources or neutron generators. The pulsed neutron logging technology of uranium ore has been popularized and applied in the United States, Russia, Australia and other countries. The key technology is almost monopolized by these countries, but the technology is prohibited in China. In the field of uranium logging, natural gamma logging has always been used in China for uranium quantification, which is characterized by large error, low efficiency, high cost and technical and economic bottlenecks. Due to the fact that the research and application of pulsed neutron log in the field of petroleum exploration and production is relatively mature in China, it is urgent to develop relevant logging instruments and uranium quantitative interpretation methods as independent intellectual property rights. This will lead to a change in the backward appearance of uranium logging. This paper analyzes the research status and development trend of neutron logging in uranium at home and abroad. © Published under licence by IOP Publishing Ltd.

关键词： Uranium

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Identification of PET/CT radiomic signature for classification of locally recurrent rectal cancer: A network-based feature selection approach

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Heliyon 2025年第1期11卷 e41404页

作者： Dalmonte, Sara Cocozza, Maria Adriana Cuicchi, Dajana Remondini, Daniel Faggioni, Lorenzo Castellucci, Paolo Farolfi, Andrea Fortunati, Emilia Cappelli, Alberta Biondi, Riccardo Cattabriga, Arrigo Poggioli, Gilberto Fanti, Stefano Castellani, Gastone Coppola, Francesca Curti, Nico IRCCS Rizzoli Orthopedic Institute Medical Technology Laboratory Bologna 40138 Italy Medical Physics Specialization School University of Bologna Bologna 40127 Italy Department of Radiology IRCCS Azienda Ospedaliera-Universitaria di Bologna Bologna 40138 Italy Medical and Surgical Department of Digestive Hepatic and Endocrine-Metabolic Diseases IRCCS Azienda Ospedaliera-Universitaria di Bologna Bologna 40138 Italy Department of Physics and Astronomy University of Bologna Bologna 40127 Italy Nuclear Medicine IRCCS Azienda Ospedaliero-Universitaria di Bologna Bologna 40138 Italy IRCCS Institute of Neurological Sciences of Bologna Data Science and Bioinformatics Laboratory Bologna 40139 Italy Department of Medical and Surgical Sciences University of Bologna Bologna 40138 Italy Dipartimento Diagnostica per Immagini AUSL Romagna UOC Radiologia Faenza Faenza 48018 Italy Academic Radiology Department of Translational Research and of New Surgical and Medical Technologies University of Pisa Pisa 56126 Italy

Background: The modern approach to treating rectal cancer, which involves total mesorectal excision directed by imaging assessments, has significantly enhanced patient outcomes. However, locally recurrent rectal cancer (LRRC) continues to be a significant clinical issue. Identifying LRRC through imaging is complex, due to the mismatch between fibrosis and inflammatory pelvic tissue. This work aimed to develop a machine learning model for predicting LRRC using radiomic features extracted from 18F-FDG Positron Emission Tomography/Computed Tomography (PET/CT). Methods: CT and PET images of PET/CT examinations were retrospectively collected from 44 patients, with 29 cases of recurrence (66 %) and 15 cases with no local recurrence (34 %). The whole analysis was conducted separately for CT and PET images to evaluate their different predictive power. Radiomic features were extracted from suspected lesion volumes identified by physicians and the most relevant radiomic features were selected to predict the presence or absence of LRRC. Feature selection was performed using a novel approach derived from gene expression analysis, based on the DNetPRO algorithm. The prediction was done using a Support Vector Classifier (SVC) with a 10-fold cross-validation. The efficiency of the pipeline in predicting LRRC was evaluated according to the sensitivity, specificity, Balanced Accuracy Score (BAS) and Matthews's Correlation Coefficient (MCC). Results: CT features were found to be the most predictive, showing a sensitivity of 0.80, a specificity of 0.82, a BAS of 0.81 and an MCC of 0.61. PET features obtained a sensitivity of 0.93, a specificity of 0.61, a BAS of 0.77 and a MCC of 0.52. The combination of PET and CT features obtained a sensitivity of 0.80, a specificity of 0.75, a BAS of 0.77 and a MCC of 0.53. Conclusions: To the best of our knowledge, the DNetPRO algorithm was applied for the first time to medical image analysis and proved suitable for the selection of radiomic featu

关键词： CT Machine learning Medical imaging PET Radiomics Rectal cancer Recurrence

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Attempt to synthesize the proton-unbound Bi182,183 isotopes

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Physical Review C 2024年第1期110卷 014326-014326页

作者： H. Huang H. Y. Wu C. Y. Guo W. Q. Zhang Q. B. Zeng D. X. Wang Z. Liu Z. H. Li A. N. Andreyev S. Antalic B. Andel A. Sitarčík H. Hua X. H. Yu Z. X. Zhou X. Wang H. Y. Lu Z. G. Gan Z. Y. Zhang L. Ma M. H. Huang H. B. Yang M. M. Zhang X. J. Wen G. S. Li F. F. Zeng X. X. Xu J. J. Liu H. Jian H. F. Zhu Q. R. Gao Z. Qin J. R. Wang Z. M. Jia S. W. Cao P. F. Zhai Y. J. Li X. H. Zhou F. S. Zhang Beijing 100049 China D-64291 Darmstadt Germany Key Laboratory of Nuclear Data School of Physics and School of Physics Engineering and Technology Advanced Science Research Center (ASRC) Department of Nuclear Physics and Biophysics School of Space Science and Physics The Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and Technology Institute of Radiation Technology

The near-symmetric complete fusion reaction Kr78+Ag107→Bi*185 was studied at the gas-filled recoil separator SHANS with an attempt to synthesize the extremely neutron-deficient proton-unbound Bi182,183 isotopes. No decay events which could be attributed to them were observed. The two- and three-particle evaporation residues Hg180,179 (αp, αpn) and Pb183,182 (pn, p2n) were identified. Their production cross sections have been measured at two bombarding energies. Based on the yields of Pb182,183 in the present work and the systematics of the ratios between the cross sections of p(x−1)n and xn evaporation channels for the most neutron-deficient odd-Z nuclei above lead, the upper limits for the half-lives of Bi182,183 were estimated to be less than 0.3µs.

关键词： Lifetimes & widths Low & intermediate energy heavy-ion reactions nuclear structure & decays 150 ≤ A ≤ 189

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Simulation of Fast Neutron Radiography with a Time-of-Flight System

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Physics Procedia 2015年 69卷 284-291页

作者： D. Chen J. Bao Q. Zhang S. Han J. Ren Y. Nie X. Ruan L. Hou Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing China 102413 Neutron Scattering Laboratory China Institute of Atomic Energy Beijing China 102413

A novel fast neutron imaging method with Time-of-Flight was analyzed, which can provide a way to improve ratio of signal to noise for discrimination of scattered particles from the background, especially for bulky sample examination. For the same system spatial resolution, the length of each unit in scintillator detector array can be increased to improve detection efficiency, which is higher than for the traditional neutron image plate obviously. Key parameters such as detection efficiency and spatial resolution have been simulated by means of a Monte-Carlo method, and the ratio of signal to noise effect was estimated from MC and experimental results. Spatial resolution and contrast of compound sample have been calculated.

关键词： Fast neutron radiography Time-of-Flight Scintillator detector array Monte-Carlo method SNR

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Octupole bands and simplex inversion in the neutron-rich nucleus Ba145

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Physical Review C 2015年第1期91卷 014317-014317页

作者： Yong-Jing Chen (陈永静) Zao-Chun Gao (高早春) Yong-Shou Chen (陈永寿) Ya Tu (图雅) Key Laboratory of Science and Technology on Nuclear Data China Institute of Atomic Energy Beijing 102413 China College of Physics Science and Technology Shenyang Normal University ShenYang 110034 China

The issue of the existence of reflection asymmetry in Ba145 has stood for the past 30 years without a common conclusion. The recent experimental data show a number of low-lying rotational bands with alternative parities, providing more strict constraints on the relevant modeling. With a proper octupole deformation, all the observed six rotational bands in Ba145 have been well reproduced by the reflection asymmetric shell model (RASM). The three octupole deformed neutron single-particle orbitals just above the octupole shell gap 88, with K=1/2,K=3/2, and K=5/2, respectively, dominate the intrinsic configurations of the observed bands. Based on the analysis of the calculated RASM wave functions, the assignments for the observed bands have been given. The experimental yrast band (ΔI=1) presents a simplex inversion at around the 11/2− state where the simplex staggering phase changes. This phenomenon may be explained in the framework of the RASM as from the change of the dominate intrinsic configuration, induced by the band mixing. The present results strongly support the appearance of the reflection asymmetry in the ground and low-lying states of Ba145.

关键词： nuclear rotational states nuclear shell theory nuclear structure NEUTRONS ELECTRON spin states

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