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Detection of Non-Ferromagnetic Metal Balls Based on the Analytical Solution of Motion-Induced Eddy-Current Field

IEEE Transactions on Instrumentation and Measurement 2025年 74卷

作者： Yan, Shaolin Chen, Xingle Xiangnan University Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education School of Physics and Electronic Electrical Engineering Chenzhou423000 China Beihang University School of Automation Science and Electrical Engineering Beijing100191 China

The rapid real-time detection and sorting of moving non-ferromagnetic metals in enclosed or hazardous environments enable the efficient reuse of metal resources, serving as a critical component in industrial production. In this article, copper, aluminum, and brass balls are selected as the typical non-ferromagnetic metal specimens, and a novel rapid detection and sorting method for moving metal objects is proposed based on the analytical solution of motion-induced eddy-current field. First, the peak value of induced voltage with integral form is obtained, which indicates that the peak value is proportional to the product of conductivity and the square of moving speed. Subsequently, different non-ferromagnetic metal balls are adopted to move in the dc coil magnetic field, with the forms of single or discrete, tangent, and different radii. The experiments show that the moving metal balls can be effectively distinguished by the peak values of induced voltage, and the relative errors are within 15%. Finally, based on the approximate linear relationships between the peak voltage and the radii of moving metal balls when taking the double logarithm, the radii can be directly calculated by the peak values, slope, intercept, and without numerical inversion. Compared with the conventional eddy current methods for stationary conductors, the analytical method proposed in this article is intuitive in form, easy to operate, and without inversion calculation, which can be used for the online and real-time detection of non-ferromagnetic moving metal balls with different moving speeds, conductivity values, and radii. © 1963-2012 IEEE.

关键词： Ferromagnetic materials

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High-precision nondestructive evaluation of a thermal barrier coating based on perovskite quantum dot anion exchange

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Nano Research 2024年第5期17卷 4582-4592页

作者： Tao Han Shufang Ding Zifan Wang Sirong Jiang Pengjiang Jing Tianshang Yi Yaqi Chen Chunzhi Jiang Xiaofeng Zhang Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education School of Physics and Electronic Electrical EngineeringXiangnan UniversityChenzhou 423000China National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering Technology Guangdong Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

Thermal barrier coatings(TBCs)in gas turbine engines are used in expressly harsh environments;thus,assessing TBC integrity status is critical for safety and ***,traditional periodic maintenance involves visual inspections of the TBCs,requiring the gas turbine to be decommissioned and partially *** importantly,tiny defects or internal damages that easily cause coating failure cannot be *** this work,a new nondestructive evaluation(NDE)technique of TBCs based on quantum dot(QD)anion exchange is first explored *** exchanging anions between the Cl ions and the CsPbBr_(3) QDs,the degrees of salt corrosion of the TBCs are *** resultant NDE technique shows that the colour of the TBCs obviously changes from green to blue,accompanied by a large blueshift(~100 nm)of the photoluminescence(PL)peak *** addition,the relationship between the PL peak position and coating thermophysical properties indicates that the precision of this NDE technique may easily identify theμm-level of the thermal growth oxide(TGO)changes inside the TBCs.

关键词： thermal barrier coatings nondestructive evaluation CsPbBr_(3)quantum dot anion exchange thermal growth oxide

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Semivortex solitons and their excited states in spin-orbit-coupled binary bosonic condensates

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Physical Review E 2024年第6期109卷 064201-064201页

作者： Haiming Deng Jinqing Li Zhaopin Chen Yaohui Liu Dong Liu Chunzhi Jiang Chao Kong Boris A. Malomed School of Physics and Electronic-Electrical Engineering Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education Hunan Engineering Research Center of Advanced Embedded Computing and Intelligent Medical Systems Physics Department and Solid-State Institute Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Instituto de Alta Investigación

It is known that two-dimensional two-component fundamental solitons of the semivortex (SV) type, with vorticities (s+,s−)=(0,1) in their components, are stable ground states (GSs) in the spin-orbit-coupled (SOC) binary Bose-Einstein condensate with the contact self-attraction acting in both components, in spite of the possibility of the critical collapse in the system. However, excited states (ESs) of the SV solitons, with the vorticity set (s+,s−)=(S+,S++1) and S+=1,2,3,..., are unstable in the same system. We construct ESs of SV solitons in the SOC system with opposite signs of the self-interaction in the two components. The main finding is stability of the ES-SV solitons, with the extra vorticity (at least) up to S+=6. The threshold value of the norm for the onset of the critical collapse, Nthr, in these excited states is higher than the commonly known critical value, Nc≈5.85, associated with the single-component Townes solitons, Nthr increasing with the growth of S+. A velocity interval for stable motion of the GS-SV solitons is found too. The results suggest a solution for the challenging problem of the creation of stable vortex solitons with high topological charges.

关键词： Solitons

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Performance of High-Resolution PET Detectors based on Long Semi-Monolithic Scintillator Slabs

Performance of High-Resolution PET Detectors based on Long S...

引用

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： S. M. Kinyanjui Z. Kuang Z. Liu N. Ren Y. Yang Paul C. Lauterbur Research Center for Biomedical Imaging Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education Xiangnan University Chenzhou China

ISBN: (数字)9798350388152

ISBN: (纸本)9798350388169

Current high-resolution PET scanners use either pixelated or monolithic scintillator detectors. Depth of interaction (DOI) encoding detector is vital for PET scanners for high imaging quality. Semi-monolithic scintillators have DOI encoding of monolithic scintillator, and improve spatial resolution by reducing edge effect. In this work, performance of 4 lutetium yttrium oxyorthosilicate (LYSO) semi-monolithic detectors was measured. Detector 1 consisted of 12, $0.96 \times 56 \times 10 \mathrm{~mm}^{3}$ slabs with BaSO 4 reflector between slabs and the front and two end faces painted black. Detector 2 was same as detector 1 but without black paint. Detector 3 was same as detector 1 but with enhanced specular reflector (ESR) instead of BaSO 4 . Detector 4 was same as detector 1 except consisting of 14 slabs $0.81 \times 56 \times 10 \mathrm{~mm}^{3}$. A $4 \times 16$ silicon photomultiplier (SiPM) array with row and colum readout circuit was used. Different positions of monolithic (y) and DOI directions of the array were irradiated using a $0.3 \mathrm{~mm}^{22} \mathrm{Na}$ point source and a single $1 \mathrm{x} 1 \mathrm{x} 20 \mathrm{~mm}^{3}$ LYSO coincidence detector. Energy square COG method improved y resolution by sim 30% compared to COG method. Black paint improved y and DOI resolutions, but degraded energy resolution. Detector with ESR had similar y and DOI resolutions, better energy resolution and slab identification compared to detector with BaSO 4 . The detector with thinner slabs provided similar y, DOI, and energy resolutions, but poorer slab identification compared to detector with thicker slabs. The detectors provided a good identification of slabs of 0.96 and 0.81 mm, y resolutions of 1.67 to 1.87 mm, DOI resolution of $\sim 2.3 \mathrm{~mm}$ and energy resolutions of 14.9% to 17.7%, and can be used in high resolution small animal and organ specific PET scanners. Machine learning positioning algorithms will be used in upcoming work to improv

关键词： Photomultipliers Scintillators Semiconductor detectors Energy resolution Detectors Encoding Silicon

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Two-dimensional materials for future information technology: status and prospects

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Science China(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School of Integrated Circuits Beijing National Research Center for Information Science and Technology (BNRist)Tsinghua University School of Electronic Science and Engineering Nanjing University The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University School of Integrated Circuits Huazhong University of Science and Technology Center for Nanochemistry (CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University State Key Laboratory for Artificial Microstruct

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

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Semi-vortex solitons and their excited states in spin-orbit-coupled binary bosonic condensates

arXiv

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arXiv 2024年

作者： Deng, Haiming Li, Jinqing Chen, Zhaopin Liu, Yaohui Liu, Dong Jiang, Chunzhi Kong, Chao Malomed, Boris A. School of Physics and Electronic-Electrical Engineering Xiangnan University Chenzhou423000 China Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education Xiangnan University Chenzhou423000 China Hunan Engineering Research Center of Advanced Embedded Computing and Intelligent Medical Systems Xiangnan University Chenzhou423000 China Physics Department Solid-State Institute Technion Haifa32000 Israel Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Tel Aviv University Tel Aviv69978 Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile

It is known that two-dimensional two-component fundamental solitons of the semi-vortex (SV) type, with vorticities (s+, s−) = (0, 1) in their components, are stable ground states (GSs) in the spin-orbit-coupled (SOC) binary Bose-Einstein condensate with the contact self-attraction acting in both components, in spite of the possibility of the critical collapse in the system. However, excited states (ESs) of the SV solitons, with the vorticity set (s+, s−) = (S+, S+ + 1) and S+ = 1, 2, 3, ..., are unstable in the same system. We construct ESs of SV solitons in the SOC system with opposite signs of the self-interaction in the two components. The main finding is stability of the ES-SV solitons, with the extra vorticity (at least) up to S+ = 6. The threshold value of the norm for the onset of the critical collapse, Nthr, in these excited states is higher than the commonly known critical value, Nc ≈ 5.85, associated with the single-component Townes solitons, Nthr increasing with the growth of S+. A velocity interval for stable motion of the GS-SV solitons is found too. The results suggest a solution for the challenging problem of the creation of stable vortex solitons with high topological charges. Copyright © 2024, The Authors. All rights reserved.

关键词： Excited states

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Nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum: I. even-even nuclei

arXiv

引用

arXiv 2022年

作者： Zhang, Kaiyuan Cheoun, Myung-Ki Choi, Yong-Beom Chong, Pooi Seong Dong, Jianmin Dong, Zihao Du, Xiaokai Geng, Lisheng Ha, Eunja He, Xiao-Tao Heo, Chan Ho, Meng Chit In, Eun Jin Kim, Seonghyun Kim, Youngman Lee, Chang-Hwan Lee, Jenny Li, Hexuan Li, Zhipan Luo, Tianpeng Meng, Jie Mun, Myeong-Hwan Niu, Zhongming Pan, Cong Papakonstantinou, Panagiota Shang, Xinle Shen, Caiwan Shen, Guofang Sun, Wei Sun, Xiang-Xiang Tam, Chi Kin Thaivayongnou Wang, Chen Wang, Xingzhi Wong, Sau Hei Wu, Jiawei Wu, Xinhui Xia, Xuewei Yan, Yijun Yeung, Ryan Wai-Yen Yiu, To Chung Zhang, Shuangquan Zhang, Wei Zhang, Xiaoyan Zhao, Qiang Zhou, Shan-Gui State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing100871 China Institute Soongsil University Seoul156-743 Korea Republic of Department of Physics Pusan National University Busan46241 Korea Republic of Department of Physics The University of Hong Kong Pokfulam 999077 Hong Kong Institute of Modern Physics Chinese Academy of Sciences Lanzhou730000 China School of Physics University of Chinese Academy of Sciences Beijing100049 China School of Physics Beihang University Beijing102206 China School of Physics and Microelectronics Zhengzhou University Zhengzhou450001 China Department of General Education for Human Creativity Hoseo University Chungnam Asan336-851 Korea Republic of College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China Center for Exotic Nuclei Studies Institute for Basic Science Daejeon34126 Korea Republic of Department of Energy Science Sungkyunkwan University Suwon16419 Korea Republic of Rare Isotope Science Project Institute for Basic Science Daejeon34000 Korea Republic of School of Physical Science and Technology Southwest University Chongqing400715 China Korea Institute of Science and Technology Information Daejeon34141 Korea Republic of School of Physics and Optoelectronics Engineering Anhui University Hefei230601 China School of Science Huzhou University Huzhou313000 China School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing100049 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China School of Physics and Electronic Engineering Center for Computational Sciences Sichuan Normal University Chengdu610068 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou7300

Ground-state properties of even-even nuclei with 8 ≤ Z ≤ 120 from the proton drip line to the neutron drip line have been investigated using the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) with the density functional PC-PK1. With the effects of deformation and continuum included simultaneously, 2583 even-even nuclei are predicted to be bound. The calculated binding energies, two-nucleon separation energies, root-mean-square (rms) radii of neutron, proton, matter, and charge distributions, quadrupole deformations, and neutron and proton Fermi surfaces are tabulated and compared with available experimental data. The rms deviation from the 637 mass data is 1.518 MeV, providing one of the best microscopic descriptions for nuclear masses. The drip lines obtained from DRHBc calculations are compared with other calculations, including the spherical relativistic continuum Hartree-Bogoliubov (RCHB) and triaxial relativistic Hartree-Bogoliubov (TRHB) calculations with PC-PK1. The deformation and continuum effects on the limits of the nuclear landscape are discussed. Possible peninsulas consisting of bound nuclei beyond the two-neutron drip line are predicted. The systematics of the two-nucleon separation energies, two-nucleon gaps, rms radii, quadrupole deformations, potential energy curves, neutron densities, neutron mean-field potentials, and pairing energies in the DRHBc calculations are also discussed. In addition, the α decay energies extracted are in good agreement with available data. Copyright © 2022, The Authors. All rights reserved.

关键词： Neutrons

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