作者机构：
[Xia, Qiaoqiao; Wang, Ji; Wang, J; Ma, Xinxin] Cent China Normal Univ, Dept Elect & Informat Engn, Wuhan, Peoples R China.;[Zheng, Le] Beijing Inst Technol, Sch Informat & Elect, Beijing, Peoples R China.;[Yang, Kai] Tongji Univ, Dept Comp Sci, Shanghai, Peoples R China.;[Chen, Zhao] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Beijing, Peoples R China.
会议名称：
IEEE Wireless Communications and Networking Conference (WCNC)
会议时间：
MAR 26-29, 2023
会议地点：
Glasgow, SCOTLAND
会议主办单位：
[Wang, Ji;Ma, Xinxin;Xia, Qiaoqiao] Cent China Normal Univ, Dept Elect & Informat Engn, Wuhan, Peoples R China.^[Zheng, Le] Beijing Inst Technol, Sch Informat & Elect, Beijing, Peoples R China.^[Yang, Kai] Tongji Univ, Dept Comp Sci, Shanghai, Peoples R China.^[Chen, Zhao] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Beijing, Peoples R China.
会议论文集名称：
IEEE Wireless Communications and Networking Conference
关键词：
Internet of Things;ultra-dense cloud radio access network;energy harvesting;successive convex approximation
摘要：
This paper studies the secrecy wireless information and power transfer problem in ultra-dense cloud radio access network (UD-CRAN) with wireless fronthaul, which is a promising framework for future Internet of Things (IoT). The transmission schemes of wireless fronthaul and access links are jointly designed, while addressing the characteristics of ultra-dense network such as base station diversity and high probability of line-of-sight transmission. Specifically, we employ the idea of block diagonalization to deal with the fronthaul interference, which support multi-stream fronthaul transmission for each remote radio head (RRH). We then jointly optimize the power allocation in the fronthaul and the resource allocation in the access link which includes beamforming for information and energy transmission, on/off of RRHs, and user-RRH association. In order to solve the formulated mixed integer non-convex optimization problem, we leverage the sparsity of beamforming vectors brought by the ultra-dense RRHs. We then solve the reformulated problem by employing the successive convex approximation approach. Finally, numerical results are presented to demonstrate the effectiveness of the proposed scheme.
期刊：
EUROPEAN PHYSICAL JOURNAL C,2023年83(1):1-14 ISSN：1434-6044
通讯作者：
Cao, S.;Deng, J.
作者机构：
[Li, Xiaowen; Deng, Jian; Cao, Shanshan] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China.;[Jiang, Ze-Fang] Hubei Engn Univ, Dept Phys & Elect Informat Engn, Xiaogan 432000, Hubei, Peoples R China.;[Jiang, Ze-Fang] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;[Jiang, Ze-Fang] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Shanshan Cao; Jian Deng] I;Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China<&wdkj&>Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, China
摘要：
Extremely large angular orbital momentum can be produced in non-central heavy-ion collisions, leading to a strong transverse polarization of partons that scatter through the quark-gluon plasma (QGP) due to spin-orbital coupling. We develop a perturbative approach to describe the formation and spacetime evolution of quark polarization inside the QGP. Polarization from both the initial hard scatterings and interactions with the QGP have been consistently described using the quark-potential scattering approach, which has been coupled to realistic initial condition calculation and the subsequent
$$(3+1)$$
-dimensional viscous hydrodynamic simulation of the QGP for the first time. Within this improved approach, we have found that different spacetime-rapidity-dependent initial energy density distributions generate different time evolution profiles of the longitudinal flow velocity gradient of the QGP, which further lead to an approximately 15% difference in the final polarization of quarks collected on the hadronization hypersurface of the QGP. Therefore, in addition to the collective flow coefficients, the hyperon polarization may serve as a novel tool to help constrain the initial condition of the hot nuclear matter created in high-energy nuclear collisions.
通讯机构：
[Yang, Z ] C;[Hu, P ] H;Hubei Univ Technol, Sch Sci, Wuhan 430068, Peoples R China.;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
copper ion storage;V2O5;charge-storage mechanism
摘要：
Copper metal is a promising anode in aqueous batteries due to its low price, noble reaction potential (0.34 V), high theoretical specific capacity, abundance and chemical stability. However, only a few copper ion storage materials have been reported. Herein, layered vanadium pentoxide is chosen to store copper ions for the first time. Ex situ XRD reveals a unique two phase transition process during cycling. The V2O5 electrode shows stable copper ion storage performance. It delivers 91.9 mAh g(-1) for the first cycle with a cycle life of as high as 4000 cycles at 1.0 A g(-1). This work provides an intriguing copper ion storage material and expands the available options of electrode materials for copper ion storage.
期刊：
Chemical Engineering Journal,2023年459:141649 ISSN：1385-8947
通讯作者：
Huang, Yongxin(huangyx@bit.edu.cn)
作者机构：
[Zhang, Xinyi; Yan, Zehua; Rui, Zhen; Wang, Jiayao; Deng, Wenwen] Suzhou Univ Sci & Technol, Sch Mat Sci & Engn, Suzhou 215000, Peoples R China.;[Yang, Ze] Cent China Normal Univ, Sch Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Huang, Yongxin] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China.
通讯机构：
[Yongxin Huang] B;[Wenwen Deng] S;School of Material Science and Engineering, Suzhou University of Science and Technology, Suzhou 215000, China<&wdkj&>Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081 China
关键词：
Aqueous zinc-ion battery;Tetrathiafulvalene;High rate and long life-span;Low temperatures
期刊：
EUROPEAN PHYSICAL JOURNAL C,2023年83(7):1-14 ISSN：1434-6044
通讯作者：
Pang, LG
作者机构：
[Pang, Long-Gang; Wang, Xin-Nian; Yang, Zhong] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[He, Yayun] South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China.;[He, Yayun] South China Normal Univ, Southern Nucl Sci Comp Ctr, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Guangdong, Peoples R China.;[Chen, Wei] Wuhan Univ Sci & Technol, Coll Sci, Wuhan 430065, Peoples R China.;[Ke, Wei-Yao; Wang, Xin-Nian] Univ Calif Berkeley, Phys Dept, Berkeley, CA 94720 USA.
通讯机构：
[Pang, LG ] C;Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
摘要：
Mach cones are expected to form in the expanding quark-gluon plasma (QGP) when energetic quarks and gluons traverse the hot medium at a velocity faster than the speed of sound in high-energy heavy-ion collisions. The shape of the Mach cone and the associated diffusion wake are sensitive to the initial jet production location and the propagation direction of the parton shower relative to the radial flow because of the distortion caused by the collective expansion of the QGP and the large density gradient. The shape of jet-induced Mach cones and their distortions in heavy-ion collisions provide a unique and direct probe of the dynamical evolution and the equation of state of QGP. However, it is difficult to identify the Mach cone and the diffusion wake in current experimental measurements of final hadron distributions because they are averaged over all possible initial jet production locations and parton-shower propagation directions. To overcome this difficulty, we develop a deep learning assisted jet tomography which uses the full information of the final hadrons from jets to localize the initial jet production positions. This method can help to constrain the initial regions of jet production in heavy-ion collisions and enable a differential study of Mach-cones with different path lengths and orientations relative to the radial flow of the QGP in heavy-ion collisions.
作者机构：
[Wu, Yuanfang; Xu, Mingmei] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Wu, Yuanfang; Xu, Mingmei] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Yuanfang Wu] K;Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
In the QCD, a transition restoring the chiral symmetry occurs at a high temperature and density. Searching for the signals of the QCD phase transition is one of the goals of the current relativistic heavy-ion physics programs. The metastable state is a unique feature of the first-order phase transition. Using the van der Waals equation of state, the role of the metastable state in finite-size effects is analyzed. It is found that the finite-size effects of the first-order phase transition are closely related to the metastable state. Metastability can be observed in the distribution of the order parameters and the probability of its occurrence depends on the system scale. A sizable probability of the metastability requires a small enough system size. The possibility of observing the metastability in the RHIC/BES is discussed.
通讯机构：
[Qin Xue] D;[Guohua Xie] S;Department of Physical Science and Technology, Central China Normal University, Wuhan 430079, People’s Republic of China<&wdkj&>Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, People’s Republic of China<&wdkj&>Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China<&wdkj&>Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
摘要：
The zero-degree calorimeter (ZDC) plays a crucial role toward determining the centrality in the Cooling-Storage-Ring External-target Experiment (CEE) at the Heavy Ion Research Facility in Lanzhou. A boosted decision tree (BDT) multi-classification algorithm was employed to classify the centrality of the collision events based on the raw features from ZDC such as the number of fired channels and deposited energy. The data from simulated
$$^{238}\textrm{U}$$
+
$$^{238}\textrm{U}$$
collisions at 500
$$\mathrm{MeV/u}$$
, generated by the IQMD event generator and subsequently modeled using the GEANT4 package, were employed to train and test the BDT model. The results showed the high accuracy of the multi-classification model adopted in ZDC for centrality determination, which is robust against variations in different factors of detector geometry and response. This study demonstrates the good performance of CEE-ZDC in determining the centrality in nucleus–nucleus collisions.
期刊：
Physica A-Statistical Mechanics and its Applications,2023年617:128666 ISSN：0378-4371
通讯作者：
Liu, FY
作者机构：
[Yang, Chunbin; Liu, Feiyi; Chen, Shiyang; Deng, Weibing; Li, Wei; Chen, Xiangna; Liu, FY] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Yang, Chunbin; Liu, Feiyi; Chen, Shiyang; Deng, Weibing; Li, Wei; Chen, Xiangna; Liu, FY] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Liu, Feiyi; Papp, Gabor; Liu, FY] Eotvos Lorand Univ, Inst Phys, 1-A Pazmany P Setany, H-1117 Budapest, Hungary.;[Li, Wei] Max Planck Inst Math Sci, D-04103 Leipzig, Germany.;[Shen, Jianmin] Baoshan Univ, Sch Engn & Technol, Baoshan 678000, Peoples R China.
通讯机构：
[Liu, FY ] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Eotvos Lorand Univ, Inst Phys, 1-A Pazmany P Setany, H-1117 Budapest, Hungary.
摘要：
A transfer learning method, Domain Adversarial Neural Network (DANN), is introduced to study the phase transition of two-dimensional q-state Potts model. With the DANN, we only need to choose a few labeled configurations automatically as input data, then the critical points can be obtained after training the algorithm. By an additional iterative process, the critical points can be captured to comparable accuracy to Monte Carlo simulations as we demonstrate it for q = 3,4, 5, 7 and 10. The type of phase transition (first or second-order) is also determined at the same time. Meanwhile, for the second -order phase transition at q = 3, we can calculate the critical exponent & nu; by data collapse. Furthermore, compared to the traditional supervised learning, we found the DANN to be more accurate with lower cost.& COPY; 2023 Elsevier B.V. All rights reserved.
作者机构：
[Huang, Guangming; Li, Gaoxiang; Tang, Wangwang] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Yang, Guoqing] Hangzhou Dianzi Univ, Coll Elect & Informat, Hangzhou 310018, Peoples R China.
通讯机构：
[Huang, GM ] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
magnetic target localization;magnetic gradient tensor;localization dead zone;eigenvector constraints
摘要：
Magnetic target localization using the magnetic gradient tensor (MGT) plays a significant role in underwater localization. However, this method inherently has a localization dead zone, which presents challenges for real-world applications. This paper delves into the root cause of this dead zone, identifying the non-invertibility of the MGT when the magnetic moment vector is orthogonal to the position vector from the target to the observation point. To tackle this issue, a method based on the eigenvector constraints is proposed. By constructing an objective function with eigenvector constraints and leveraging the property that its gradient at the observation point is zero, we derive an equivalent expression for the inverse of MGT that always holds and further develop a dead-zone-free localization method. To validate the robustness and efficacy of the proposed localization method, a comparative analysis with other methods is conducted. Simulation results in a 10 m × 10 m area under Gaussian noise demonstrate the proposed method’s capability to eliminate the dead zone and achieve an average localization error of 0.032 m. Experimental results further demonstrate that the proposed method eliminates the localization dead zone and exhibits greater robustness than the dominant method in the normal region. In summation, this paper provides an effective method for eliminating localization dead zone, offering a more stable and reliable method for magnetic target localization in practice.
