作者机构：
[Cheng, Houyuan; Dai, Yilin; Yang, Helin; Jin, Jing; Fu, Yang; Zhou, Xiaofeng] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Ding, Fan] China Ship Dev & Design Ctr, Wuhan 430064, Peoples R China.
通讯机构：
[Yang, HL ] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
3-D structure;Frequency selective rasorber;Polarization insensitive;Switchable transmission band
摘要：
A novel polarization insensitive ultrawideband frequency selective rasorber (FSR) based on a 3-D cubic structure is proposed, and the fundamental operating principles of the three parts are demonstrated by equivalent circuit models. The first one is a 3-D FSR based on the multiple resonant absorptions of the curved longer dipole and shorter dipole excitation in the resonance chamber and the insertion of the interdigital resonator (IR) structure in the shorter dipole to form a transmission window. The passband with an insertion loss of less than 3 dB is 10.3-12.9 GHz (22.4%), and the frequency bandwidth with a reflection coefficient of less than -10 dB ranges from 4.2 to 20.5 GHz (132%). The second is a reconfigurable frequency selective surface (FSS) with two operating states, and the third is a 3-D FSR with a switchable passband feature that incorporates the above two structures of loaded switching diodes.
作者机构：
[Ren, Jia; Yang, Jun; Wang, Xiangyu Ivy; Zou, Ze-Cheng] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China.;[Yu, Yun-Wei; Yu, YW] Cent China Normal Univ, Inst Astrophys, Wuhan 430079, Peoples R China.;[Yu, Yun-Wei; Yu, YW] Cent China Normal Univ, Key Lab Quark & Lepton Phys, Minist Educ, Wuhan 430079, Peoples R China.;[Zhu, Jin-Ping] Monash Univ, Sch Phys & Astron, Clayton, Vic 3800, Australia.;[Zhu, Jin-Ping] OzGrav, ARC Ctr Excellence Gravitat Wave Discovery, Clayton, Vic 3800, Australia.
通讯机构：
[Yu, YW ] C;Cent China Normal Univ, Inst Astrophys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys, Minist Educ, Wuhan 430079, Peoples R China.
摘要：
The second brightest gamma-ray burst, GRB 230307A (with a duration T 90 similar to 40 s), exhibited characteristics indicative of a magnetar engine during the prompt emission phase. Notably, a suspected kilonova was identified in its follow-up optical and infrared observations. Here we propose that the origin of GRB 230307A is a neutron star-white dwarf (NS-WD) merger as this could naturally explain the long duration and the large physical offset from the center of its host galaxy. In the framework of such an NS-WD merger event, the late-time kilonova-like emission is very likely to be powered by the spin-down of the magnetar and the radioactive decay of 56Ni, rather than by the decay of r-process elements as these heavy elements may not easily be synthesized in an NS-WD merger. It is demonstrated that the above scenario can be supported by our fit to the late-time observational data, where a mass of similar to 10-3 M circle dot 56Ni is involved in the ejecta of a mass of similar to 0.1 M circle dot. Particularly, the magnetar parameters required by the fit are consistent with those derived from the early X-ray observation.
摘要：
Spike-timing-dependent plasticity (STDP) is one of the important rules for the change of synaptic weights between neurons in biological nervous systems. In this paper, we study the effect of STDP on the synchronization phenomenon induced by time delay in the neuronal network which is the scale-free network with small-world property, and nodes of the network are constructed by Izhikevich neuron and connected by chemical synapses. For appropriate time delay values, there exists an optimal range of STDP maximum weight value in which the synchronization of the network is better, and in addition the synchronization is decreased with the increasing of STDP maximum weight value. The network with high synchronization has a centralized distribution of synaptic weights within it, while conversely, an unsynchronized network has a more discrete distribution of synaptic weights. When the STDP maximum weight value is too small, the collective firing pattern of network is not affected by synaptic current, and the synchronization of the network is also not affected. Interestingly, comparing with the small-world network and the scale-free network, it is found that a network has a smaller range of optimal STDP maximum weight values when the network is of larger average clustering coefficient, shorter average shortest path length, and higher small-world property. Our results can illuminate the potential significance of STDP for information processing and transmission in the nervous system.
作者机构：
[Kang, Huipeng; Wei, Mingzheng; Liu, Huipeng xiaojun] Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Innovat Acad Precis Measurement Sci & Technol, Wuhan 430071, Peoples R China.;[Wei, Mingzheng] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Kang, Huipeng; Liu, Huipeng xiaojun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
通讯机构：
[Kang, HP ] C;Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Innovat Acad Precis Measurement Sci & Technol, Wuhan 430071, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
关键词：
High harmonic generation;Inelastic scattering;Ionization;Laser light;Photoelectron spectroscopy;Systems design
摘要：
We report on a theoretical study of nonsequential double ionization (NSDI) of magnesium atoms by using combined linearly and circularly polarized fields. By employing a concise model including the dynamic ionic dipole potential, we show that the polarization effects can be controlled by tuning the subcycle waveform of the electric field of the two-color pulses. We demonstrate that the influence of the dipole potential on NSDI depends on the symmetry of two-color laser fields by tracing back the electron trajectories. Furthermore, we propose a method allowing for manipulating the returning trajectories with the initial direction of the tunneled electrons almost unchanged.
作者机构：
[Luo, Tan; Wang, Xin-Nian; He, Yayun] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.;[Luo, Tan; Wang, Xin-Nian; He, Yayun] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Luo, Tan] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, E-15782 Santiago de Compostela, Galicia, Spain.;[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.
通讯机构：
[Luo, T ] 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.;Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, E-15782 Santiago de Compostela, Galicia, Spain.
摘要：
A linear Boltzmann transport (LBT) Monte Carlo model has been developed to describe jet propagation and interaction with the quark -gluon plasma (QGP) in relativistic heavy -ion collisions. A complete set of elastic -scattering processes and medium -induced gluon emissions based on the higher -twist formalism are incorporated for both jet shower and medium recoil partons. It has been employed to describe experimental data on large transverse momentum hadron and jet spectra, correlation and jet substructures in high-energy heavy -ion collisions. We document in detail the structure of the model and validation of the Monte Carlo implementations of the physics processes in LBT, in particular, the inelastic process of medium -induced gluon radiation. We carry out a comprehensive examination of the jet -medium interaction as implemented in LBT through energy loss and momentum broadening of a single hard parton, the energy and transverse momentum transfer from leading partons to medium -induced gluons and jet -induced medium excitation, and medium modification of reconstructed jets in a static and uniform medium. With realistic and event -by -event hydrodynamic medium in heavy -ion collisions, we compute and compare with experimental data on the jet cone -size dependence of the single inclusive jet suppression at both the BNL Relativistic Heavy -Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC), the dijet asymmetry at the LHC and gamma -jet correlation at RHIC. Effects of medium -induced gluon emissions and jet -induced medium excitation on jet observables are systematically examined. Rescatterings of the radiated gluons and recoil partons with the QGP are found essential to account for the enhancement of soft particle yield toward the edge of the jet cone.
期刊：
Microwave and Optical Technology Letters,2024年66(2):e34083- ISSN：0895-2477
通讯作者：
Yang, HL
作者机构：
[Yang, Helin; Fu, Yang; Yang, Haohui] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430000, Peoples R China.;[Ding, Fan] China Ship Dev & Design Ctr, Wuhan, Peoples R China.;[Chen, Shiju] Sci & Technol Complex Syst Control & Intelligent A, Beijing, Peoples R China.
通讯机构：
[Yang, HL ] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430000, Peoples R China.
关键词：
chaff cloud;dipole cluster;electromagnetic scattering;radar cross section (RCS);the linear method of moment (LMM)
摘要：
This paper equates chaff clouds to dipole clusters and studies the electromagnetic scattering problem of dipole clusters based on the linear method of moment (LMM) that solve the electric field Integral equation with the pulse basis function. Firstly, the radar cross section (RCS) of three dipole elements is calculated. The dipole element is divided into 11 segment line units using pulse basis functions. The actual chaff clouds are modeled as two nearest dipole cluster models, which are cubic dipole cluster with uniform distribution formed and spherical dipole cluster with Gaussian distribution formed. The total RCS and total E-Field magnitude of two dipole cluster models were calculated. Finally, two physical models are constructed based on the simulation models and an experiment is designed. The electromagnetic scattering characteristics of the two models are measured, which verifies the accuracy of the simulation results and the operability of the experiment.
作者机构：
[Zha, S; Zha, Shuai] Hubei Univ Chinese Med, Sch Lab Med, 16 Huangjia Lake West Rd, Wuhan 430065, Peoples R China.;[Zha, S; Zha, Shuai] Hubei Shizhen Lab, Wuhan 430061, Peoples R China.;[Jian, Yuehan; Pan, Siyu; Jiang, Lijun] Cent China Normal Univ, Sch Life Sci, Hubei Key Lab Genet Regulat & Integrat Biol, Wuhan 430079, Peoples R China.;[Peng, Yunhui] Cent China Normal Univ, Inst Biophys, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zha, S ] H;[Jiang, LJ ] C;Hubei Univ Chinese Med, Sch Lab Med, 16 Huangjia Lake West Rd, Wuhan 430065, Peoples R China.;Hubei Shizhen Lab, Wuhan 430061, Peoples R China.;Cent China Normal Univ, Sch Life Sci, Hubei Key Lab Genet Regulat & Integrat Biol, Wuhan 430079, Peoples R China.
关键词：
Lanthanide nanosensor;Upconversion emission;NIR-II fluorescence;H 2 S detection;Endogenous H 2 S activated nanosensor
摘要：
Hydrogen sulfide (H2S), a third gas signaling molecule, is considered to play a vital role in the development and treatment of diseases. To elucidate the intricate role of H2S in the organism and its participation in disease processes, there is an urgent need to visualize the dynamics of H2S. However, most currently available molecular probes have limitations in terms of sensitivity, specificity, and precision. In this study, the safe and biocompatible upconversion nanosensor NaYF4:Yb3+, Tm3+@NaYF4 anchored with Ag2O was successfully fabricated for H2S detection with an ultralow detection limit at 0.93 ng/mL. NaYF4:Yb3+, Tm3+@NaYF4@Ag2S is formed through in situ sulfuration reaction, and second near-infrared (NIR-II) fluorescence can be recorded upon the presence of H2S under 808 nm excitation. The results demonstrate the exceptional detection linearity and high specificity for H2S quantification. Additionally, NaYF4:Yb3+, Tm3+@NaYF4@Ag2O possesses a safe nature in normal and cancer cells. This nanosensor presents a NIR fluorescence imaging strategy for highly sensitive and specific detection of H2S, which has promises to be a practical tool for biomedical applications.
期刊：
Journal of Statistical Mechanics: Theory and Experiment,2024年2024(2):023403 ISSN：1742-5468
通讯作者：
Marsili, M
作者机构：
[Xie, Rongrong] Cent China Normal Univ CCNU, Key Lab Quark & Lepton Phys MOE, Wuhan, Peoples R China.;[Xie, Rongrong] Cent China Normal Univ CCNU, Inst Particle Phys, Wuhan, Peoples R China.;[Marsili, Matteo; Marsili, M] Abdus Salam Int Ctr Theoret Phys, Quantitat Life Sci Sect, I-34151 Trieste, Italy.
通讯机构：
[Marsili, M ] A;Abdus Salam Int Ctr Theoret Phys, Quantitat Life Sci Sect, I-34151 Trieste, Italy.
关键词：
learning theory;machine learning
摘要：
We discuss the concept of probabilistic neural networks with a fixed internal representation being models for machine understanding. Here, 'understanding' is interpretted as the ability to map data to an already existing representation which encodes an a priori organisation of the feature space. We derive the internal representation by requiring that it satisfies the principles of maximal relevance and of maximal ignorance about how different features are combined. We show that, when hidden units are binary variables, these two principles identify a unique model-the hierarchical feature model-which is fully solvable and provides a natural interpretation in terms of features. We argue that learning machines with this architecture possess a number of interesting properties, such as the continuity of the representation with respect to changes in parameters and data, the possibility of controlling the level of compression and the ability to support functions that go beyond generalisation. We explore the behaviour of the model with extensive numerical experiments and argue that models in which the internal representation is fixed reproduce a learning modality which is qualitatively different from that of traditional models, such as restricted Boltzmann machines.
摘要：
In recent years, the coexistence of different states in the neural system has attracted widespread interest. Researchers have found a coexisting state of spiking and resting in homogeneous networks, which is known as the chimera-like state. The real cortical network is a much more complex and heterogeneous network. Therefore, the excitatory-inhibitory cortical neuronal network is constructed based on Hodgkin-Huxley neuronal model in this paper, and the chimera-like state is further investigated in the heterogeneous network. It is found that the chimera-like state is related to the balance between excitatory and inhibitory synaptic currents. The excitatory coupling current can counteract the initial condition effect and promote synchronized firing of neurons in the network. The inhibitory coupling current desynchronizes the network and thus induces synaptic noise, resulting in an inverse bell-shaped dependence of the change in the number of spiking neurons. We analyzed the underlying mechanisms of synaptic noise in the phase plane diagram and found it has asymmetry for the neuronal state transition. In addition, neurons with low degrees have a higher probability of undergoing state transitions. Finally, we verified that the chimera-like state is robust to network topology and initial conditions. The results provide a new insight into neuronal interactions in heterogeneous networks and might help to reveal the mechanisms of coexistence of different states in the cortical network.
通讯机构：
[Huang, GM ] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
scalar magnetometer;subsea power cables;attitude-independent detection;route tracking;high sea condition
摘要：
To overcome the shortcoming wherein the accuracy of subsea cable detection can be affected by the determination of the bias vector, scale factors, and non-orthogonality corrections of the vector magnetometer, a real-time attitude-independent route tracking method for subsea power cables is investigated theoretically and experimentally by means of scalar magnetic field checking. The measurement of the magnetic field B-c produced by the current in a cable is made immune to the influence of the platform attitude by extracting the component of B-c along the geomagnetic field using a high-bandwidth self-oscillating optically pumped magnetometer. The self-oscillating frequency is proved to be independent of the attitude of the magnetometer with the theoretical model. Experiments are carried out to test the attitude-independent performance, and the effectiveness of route tracking is verified by the results of the sea experiment. The proposed method will effectively improve the ability to locate subsea cables under high sea conditions.
期刊：
Journal of Instrumentation,2024年19(03):C03031 ISSN：1748-0221
通讯作者：
Gao, C.;Zhang, D
作者机构：
[Yang, Y.] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China.;[Yang, Y.] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.;[Gao, C.; Liu, L.; Zhang, D; Gao, C; Wang, H.; Qiao, Y.; Zhang, D.; Huang, G.; Liang, T.; Chen, K.; Hu, Z.; Sun, X.; Liu, J.] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.;[Tian, X.] Hubei Univ Sci & Technol, Sch Resources Environm Sci & Engn, Xianning 437100, Peoples R China.;[Song, Z.] Naval Univ Engn, Coll Elect Engn, Wuhan 430033, Peoples R China.
通讯机构：
[Zhang, D ; Gao, C] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.
关键词：
Analogue electronic circuits;CMOS readout of gaseous detectors;Front-end electronics for detector readout
摘要：
This paper presents the design and electrical test results of a low-noise front-end chip (named Topmetal-S) in a High-pressure Time Projection Chamber (TPC) for searching the neutrinoless double beta decay. The Topmetal-S has been fabricated in a 130 nm CMOS technology. The proposed front-end chip consists of a charge collection electrode, a Charge Sensitive Amplifier (CSA) and peripheral circuits. The test results indicate that the CSA features an input linear dynamic range of approximately 6.64 fC, a charge-conversion gain of about 220 mV/fC and an Equivalent Noise Charge (ENC) of approximately 115e(-) after a digital trapezoidal pulse shaper.
作者机构：
[Yang, Zhong; Wang, Xin-Nian] Cent China Normal Univ, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.;[Yang, Zhong; Wang, Xin-Nian] Cent China Normal Univ, Inst Particle Phys, 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.;[Moult, Ian] Yale Univ, Dept Phys, New Haven, CT 06511 USA.
通讯机构：
[Yang, Z ] 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.
摘要：
Energy -energy correlators (EECs) are promising observables to study the dynamics of jet evolution in the quark -gluon plasma (QGP) through its imprint on angular scales in the energy flux of final -state particles. We carry out the first complete calculation of EECs using realistic simulations of high-energy heavy -ion collisions and dissect the different dynamics underlying the final distribution through analyses of jet propagation in a uniform medium. The EECs of gamma -jets in heavy -ion collisions are found to be enhanced by the medium response from elastic scatterings instead of induced gluon radiation at large angles. In the meantime, EECs are suppressed at small angles due to energy loss and transverse momentum broadening of jet shower partons. These modifications are further shown to be sensitive to the angular scale of the in -medium interaction, as characterized by the Debye screening mass. Experimental verification and measurement of such modifications will shed light on this scale and the short -distance structure of the QGP in heavy -ion collisions.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
Journal of High Energy Physics,2024年(1) ISSN：1029-8479
通讯作者：
Luo, Y
作者机构：
[Ketel, T.; Mulder, M.; Tuning, N.; Usachov, A.; Lukashenko, V; Galati, M. D.; Akiba, K.; Aaij, R.; Snoch, A.; De Bruyn, K.; Biolchini, A.; Kostiuk, I; Jans, E.; Heijhof, K.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; Onderwater, C. J. G.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Schubiger, M.; Hulsbergen, W.] Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands.;[De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; de Souza Leite, J. Baptista; Torres, M. Cruz; Machado, D. Torres; Gomes, A.; Carneiro Da Graca, U. De Freitas; dos Reis, A. C.; Santoro, L.; Massaferri, A.] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil.;[De Paula, B. Souza; Lopes, J. H.; Polycarpo, E.; Souza De Almeida, F. L.; Gandelman, M.; Gobel, C.; Rangel, M. S.; Hicheur, A.; Nasteva, I; Barbosa, I. R.; Otalora Goicochea, J. M.; Gomes, A.; Garcia, L. Meyer; Rodrigues, F. Ferreira; De Paula, L.; Amato, S.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.;[Cai, H.; Bian, L.; Liu, G.; Wang, Z.; Qu, S.; Qin, N.; Li, T.; Ren, Z.; Xu, L.; Tou, D. Y.; Huang, X.; Li, H.; Wang, J.; Li, A.; Hu, X.; Hu, J.; Song, Y.; Tan, Y.; Gong, G.; Wang, X.; Bursche, A.; Lian, Z.; Kang, Y.; Fang, B.; Qi, H. R.; Zhu, X.; Sun, L.; Luo, Y.; Yang, D.; Mu, H.; Zeng, M.; Dong, C.; Zhang, L.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.;[Lu, Y.; Li, Y.; Yuan, X.; Sheng, S.; Li, T.; Li, P-R; Wang, J.; Chen, S.; Xu, Z.; Tobin, M.; Miao, D.; Liu, K.; Jiang, X.; Batsukh, B.; Zou, Q.; Feng, M.; Liu, S.] Inst High Energy Phys IHEP, Beijing, Peoples R China.
通讯机构：
[Luo, Y ] T;Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
关键词：
Heavy Quark Production;Relativistic Heavy Ion Physics;QCD;Heavy Ion Experiments
摘要：
The production of prompt D+ and D-s(+) mesons is studied in proton-lead collisions at a centre-of-mass energy of root s(NN) = 5.02TeV. The data sample corresponding to an integrated luminosity of (1.58 +/- 0.02)nb(-1) is collected by the LHCb experiment at the LHC. The differential production cross-sections are measured using D+ and D-s(+) candidates with transverse momentum in the range of 0 < p(T) < 14 GeV/c and rapidities in the ranges of 1.5 < y* < 4.0 and -5.0 < y* < -2.5 in the nucleon-nucleon centre-of-mass system. For both particles, the nuclear modification factor and the forward-backward production ratio are determined. These results are compared with theoretical models that include initial-state nuclear effects. In addition, measurements of the cross-section ratios between D+, D-s(+) and D-0 mesons are presented, providing a baseline for studying the charm hadronization in lead-lead collisions at LHC energies.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
Journal of Instrumentation,2024年19(03):P03010 ISSN：1748-0221
通讯作者：
Stanislaus, S
作者机构：
[Ketel, T.; Tuning, N.; Usachov, A.; de Boer, J.; Lukashenko, V.; Galati, M. D.; Heijhoff, K.; Magdalinski, D.; Akiba, K.; Aaij, R.; Snoch, A.; Biolchini, A.; Jans, E.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; van Veghel, M.; Koppenburg, P.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Kostiuk, I.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.;[Monk, M.; Fujii, Y.; Egede, U.; Lane, J. J.; Henderson, R. D. L.; Hadavizadeh, T.; Song, R.; Ward, J. A.; Walton, E. J.] Monash Univ, Sch Phys & Astron, Melbourne, Vic, Australia.;[Da Graca, U. De Freitas Carneiro; Massafferri, A.; De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; Torres, M. Cruz; Machado, D. Torres; Gomes, A.; dos Reis, A. C.; Santoro, L.; Leite, J. Baptista de Souza] Ctr Brasileiro Pesquisas Fisicas CBPF, Rio De Janeiro, Brazil.;[De Paula, B. Souza; Lopes, J. H.; Goicochea, J. M. Otalora; Polycarpo, E.; Gandelman, M.; Rangel, M. S.; Hicheur, A.; Garcia, L. Meyer; Rodrigues, F. Ferreira; De Paula, L.; Nasteva, I.; Amato, S.] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil.;[Zheng, X. Z.; Ma, G. M.; Wang, Z.; Qu, S.; Qin, N.; Xu, L.; Tou, D. Y.; Wang, J.; Li, A.; Zhang, Y. Z.; Hu, X.; Song, Y.; Tan, Y.; Gong, G.; Lian, Z.; Kang, Y.; Qi, H. R.; Zhu, X.; Luo, Y.; Yang, D.; Mu, H.; Zeng, M.; Dong, C.; Zhang, L.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.
通讯机构：
[Stanislaus, S ] U;Univ Oxford, Dept Phys, Oxford, England.
关键词：
Analysis and statistical methods;Detector alignment and calibration methods (lasers, sources, particle-beams);Large detector-systems performance;Performance of High Energy Physics Detectors
摘要：
Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy root s = 13 TeV during 2016, 2017 and 2018. The biases are determined using Z -> mu(+)mu(-) decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10(-4) GeV-1 level, improves the Z -> mu(+)mu(-) mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.
摘要：
PURPOSE: Lack of adequate physical exercise is the main reason for the frequent occurrence of health problems among Chinese college students. The purpose of this study is to explore the effects of control beliefs on cardiovascular fitness among college students and the mediating role of subjective exercise experience and exercise adherence in it. METHODS: The Control Belief Scale, the Subjective Exercise Experience Scale (SEES), and the Exercise Adherence Scale were used to investigate 1854 freshmen and sophomores in Nantong and Suzhou, China. Cardiovascular fitness data for college students from the National Student Physical Health Standard and SPSS 23.0 statistical analysis software were used to carry out statistics and analyses on the questionnaires. Correlation analysis, regression analysis, and mediation models were used to assess control beliefs, subjective exercise experiences, exercise adherence, and cardiovascular fitness. RESULTS: The control belief of college students was directly related to cardiovascular fitness (effect value: 0.121), the mediating effect through subjective exercise experience was not significant, indirectly related through the mediating effect of exercise adherence (effect value: 0.101), and indirectly related through the mediating effect of subjective exercise experience and exercise adherence (effect value: 0. 019). The positive prediction effect of control belief on cardiovascular fitness of college students was significant (β = 0.267, P < 0.001), and the positive prediction effect of control belief on cardiovascular fitness of college students was still significant (β = 0.121, P < 0.01) after adding the intermediary variables (subjective exercise experience and exercise adherence). CONCLUSIONS: The cardiovascular fitness of college students was not only directly affected by control beliefs but also affected by the chain mediating effect of subjective exercise experience and exercise adherence. Therefore, it is necessary to improve the control beliefs, subjective exercise experiences, and exercise adherence of college students to improve their cardiovascular fitness level and enhance their physical health.
摘要：
The security performance of image encryption schemes based on chaotic systems has been greatly improved. Specifically, those chaotic systems with high-dimension or special attractors have shown more benefits for enhancing performance. By introducing the tangent function, a 4-dimensional chaotic system with infinite coexisting attractors is constructed. And the dynamical behaviors are analyzed through phase diagrams, bifurcation diagrams, Lyapunov exponent spectrum and spectral entropy complexity diagram. The results demonstrate that the system exhibits self-replication with respect to the initial value y0 and possesses rich dynamical properties, such as infinite coexisting attractors, sensitivity to initial values and period-doubling bifurcation. These characteristics make it suitable for chaotic cryptography applications. Subsequently, a lossless double color image encryption scheme is designed based on the constructed system. The scheme adopts a diffusion-scrambling-diffusion processing method, and cleverly utilizes the information of the original plaintext image in the scrambling process, which significantly enhances the ability to resist known plaintext attacks or selected plaintext attacks. The experimental results verify that the designed algorithm not only effectively encrypts color and grayscale images, but also allows for encryption images of any size. Moreover, the algorithm implementation process is efficient and ensures high security performance, effectively resisting differential attacks, rotation attacks and cropping attacks. This research exploration on the chaotic characteristics of the nonlinear high-dimensional system and its application in image encryption is expected to provide theoretical guidance in the field of secure communication.
作者机构：
[Jiang, Zefang; Yuan, Xuefei; Ye, Shasha; Jiang, ZF] Hubei Engn Univ, Dept Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;[Jiang, Zefang; Jiang, ZF] Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.
通讯机构：
[Jiang, ZF ] H;Hubei Engn Univ, Dept Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China.;Cent China Normal Univ, Inst Particle Phys, Key Lab Quark & Lepton Phys, MOE, Wuhan 430079, Peoples R China.
关键词：
global polarization splitting;Lambda/Lambda hyperons;hydrodynamic model CLVisc;finite net baryon density
摘要：
We present a systematic study of the global polarization of Lambda and Lambda hyperons in Au+Au collisions at root s(NN)=19.6 GeV using the viscous hydrodynamic model CCNU-LBNL-Viscous hydrodynamic model (CLVisc) with a modified 3D optical Glauber model initial condition. The global polarization splitting as a function of transverse momentum and rapidity is investigated. It is shown that the magnitude of the net baryon density and its longitudinal titled geometry at the initial stage both have significant effects on the global polarization splitting of Lambda and Lambda over bar hyperons. Specifically, an increase in the magnitude of the net baryon density leads to a corresponding minor increase in the global polarization splitting. Similarly, alterations in the tilted geometry of net baryon density results in significant changes in the splitting of the global polarization.
摘要：
The simplicial contagion model is employed to study the spreads of two epidemics with mutation in high-order networks. The original epidemic can give birth to a mutated epidemic, but not vice versa. Numerical simulations and mean-field theory results reveal that the spread of the mutated epidemic is entirely dependent on the original epidemic if it cannot spread independently. Conversely, the spread of the original epidemic is entirely inhibited when mutated epidemic spreads by itself. The stability analysis of mean-field theory explains the extinction of the original epidemic and the emergence of a bistable region. Two stable equilibrium points remain unchanged despite variations in parameters like the original epidemic's infection probabilities and mutation rates. While the neighborhood of the stable equilibrium points is regulated by the above parameters. Our conclusions have also been validated in real-world networks.
作者机构：
[Zhao, D.] Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Wang, J. B.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.; Li, D.] Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Wang, J. B.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.] Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, N.; Yuen, R.; Yuan, J. P.; Yao, J. M.; Yan, W. M.; Wu, Q. D.; Wang, N; Zhou, X.; Wang, S. Q.; Kou, F. F.; Sun, S. N.; Zhao, D.] Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;[Wang, P.; Meng, L. Q.; Xue, M. Y.; Zhu, W. W.; Zhang, L.; Chen, Y. T.; Miao, X. L.; Niu, J. R.; Niu, C. H.; Qian, L.; Yuan, M.; Li, D.; Yue, Y. L.] Chinese Acad Sci, Natl Astron Observ, A20 Datun Rd, Beijing 100101, Peoples R China.
通讯机构：
[Wang, N ] C;Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.;Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Xinjiang, Peoples R China.;Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China.
摘要：
We report the timing analysis of PSR J1846-0513, a pulsar discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in Commensal Radio Astronomy FAST Survey. The pulsar possesses a spin period of 23.36 ms and a spin-down rate ( P ) of 1.0106(3) x 10-18 s s-1, and it is located in an eccentric orbit (e similar to 0.208) with an orbital period of 0.61 days. The characteristic age and surface magnetic field of the pulsar are found to be 366.62 Myr and 4.9178 x 109 G, respectively, indicating that it is a recycled pulsar. Using over two years of timing data, we measure the periastron advance omega = 0.8956(8) deg yr-1. By assuming that this effect is purely relativistic, we have estimated the total mass M = 2.6287(35)M circle dot and obtained an upper limit for the pulsar mass and a lower limit for the companion's mass. Our results indicate that this is a double neutron star system.
通讯机构：
[Zhang, DL; Chen, K ; Wang, HL] C;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.;Hubei Prov Engn Res Ctr Silicon Pixel Chip & Detec, Wuhan 430079, Peoples R China.
关键词：
CMOS readout of gaseous detectors;Front-end electronics for detector readout;Gaseous imaging and tracking detectors;Time projection Chambers (TPC)
摘要：
Within the project of building a time projection chamber using 100 kg of high-pressure 82SeF6 gas to search for the neutrinoless double -beta decay in the NvDEx collaboration, we are developing a CMOS charge sensor, named Topmetal-S, which is tailored for the experiment to detect the ions without gas amplification. In this work, the performance of the sensor is presented. The equivalent noise charge of the sensor is measured to be about 120 to 140 e- depending on the operating point, with the charge injection capacitance calibrated against external capacitors. The signal waveforms are investigated with various chip parameters and experimental settings. In addition to electrons, both negatively and positively charged ions could be detected, and their waveforms are studied using air and SF6 gases. Using the sensor, the mobility of negative ions in ambient air in the atmospheric pressure is measured to be 1.555 +/- 0.038 cm2 center dot V-1 center dot s-1. Our study demonstrates that the Topmetal-S chip could be used as the ion detection charge sensor for the experiment. Further work is ongoing to reduce the noise of the sensor and to develop a small readout plane with tens of the sensors.
