作者机构：
[Luo, Xiaofeng; Liu, Feng; Chen, Jiamin] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;[Luo, Xiaofeng; Liu, Feng; Chen, Jiamin] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China.;[Luo, Xiaofeng] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.;[Nara, Yasushi] Akita Int Univ, Akita 0101292, Japan.;[Nara, Yasushi] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany.
关键词：
heavy-ion collisions;elliptic flow;equation of state;QCD phase transition
摘要：
We perform a systematic study of elliptic flow (v_2)in Au+Au collisions at √S_(NN)=5 GeV by using a microscopic transport model, JAM. The centrality,pseudorapidity, transverse momentum and beam energy dependence of v_2 for charged as well as identified hadrons are studied. We investigate the effects of both the hadronic mean-field and the softening of equation of state (EoS) on elliptic flow. The softening of the EoS is realized by imposing attractive orbits in two body scattering, which can reduce the pressure of the system. We found that the softening of the EoS leads to the enhancement of v_2, while the hadronic mean-field suppresses v_2 relative to the cascade mode. It indicates that elliptic flow at high baryon density regions is highly sensitive to the EoS and the enhancement of V_2 may probe the signature of a first-order phase transition in heavy-ion collisions at beam energies of a strong baryon stopping region.
作者机构：
[Jia, Ya; Xu, Ying; Wang, Li-Fang] Cent China Normal Univ, Dept Phys, Wuhan 430079, Hubei, Peoples R China.;[Jia, Ya; Xu, Ying; Wang, Li-Fang] Cent China Normal Univ, Inst Biophys, Wuhan 430079, Hubei, Peoples R China.;[Ma, Jun] Lanzhou Univ Technol, Dept Phys, Lanzhou 730050, Gansu, Peoples R China.;[Ma, Jun] King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, POB 80203, Jeddah 21589, Saudi Arabia.
通讯机构：
[Jia, Ya] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Hubei, Peoples R China.;Cent China Normal Univ, Inst Biophys, Wuhan 430079, Hubei, Peoples R China.
摘要：
Feed-forward gene transcriptional regulatory networks, as a set of common signal motifs, are widely distributed in the biological systems. In this paper, the noise characteristics and propagation mechanism of various feed-forward gene transcriptional regulatory loops are investigated, including (i) coherent feed-forward loops with AND-gate, (ii) coherent feed-forward loops with OR-gate logic, and (iii) incoherent feed-forward loops with AND-gate logic. By introducing logarithmic gain coefficient and using linear noise approximation, the theoretical formulas of noise decomposition are derived and the theoretical results are verified by Gillespie simulation. From the theoretical and numerical results of noise decomposition algorithm, three general characteristics about noise transmission in these different kinds of feed-forward loops are observed. i) The two-step noise propagation of upstream factor is negative in the incoherent feed-forward loops with AND-gate logic, that is, upstream factor can indirectly suppress the noise of downstream factors. ii) The one-step propagation noise of upstream factor is non-monotonic in the coherent feed-forward loops with OR-gate logic. iii) When the branch of the feed-forward loop is negatively controlled, the total noise of the downstream factor monotonically increases for each of all feed-forward loops. These findings are robust to variations of model parameters. These observations reveal the universal rules of noise propagation in the feed-forward loops, and may contribute to our understanding of design principle of gene circuits.
作者机构：
[Qiancheng Zhu; Wenjuan Chen; Guodong Shi; Ying Yu; Kai Jin; Xiaoqin Lan; Desheng Cai; Jianqing Zhou] Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China
通讯机构：
[Ying Yu] I;Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
关键词：
存储系统;精力;材料设计;应用程序;多维;锂离子电池;存储设备;电子学
摘要：
The development of clean, sustainable and renewable energy storage systems is in urgent need with the fast-growing energy demand in the areas of electric vehicles and mobile electronics etc. Lithium-ion batteries(LIBs) have been deemed to be the most promising energy storage devices for their high power density, long cycle life and fast charge-discharge rates. Transition metal oxides, such as FeO_x, CoO_x, NiO, MnO_2 and SnO_2 etc. have been intensively studied as promising anode materials due to their high theoretical specific capacities, environmental benignity and low cost. Recently, ternary metal oxides such as NiCo_2O_4, ZnCo_2O_4, CuCo_2O_4, and ZnMn_2O_4 etc. have been reported to exhibit high electrochemical activities because of their complex chemical composition and the synergic effects of multiple metal species. However, ternary metal oxides also have conductivity issue although their conductivity is better than nonmetal oxides. Some strategies have been performed to solve these problems by structure improvement and the incorporation of carbon nanotubes, graphene, and metal nanoparticles(NPs) and so on. But the capacity and especially the cycle performance for metal oxides or ternary metal oxides are still limited.
摘要：
We study the sign distribution of generalized magnetic susceptibilities in the temperature-external magnetic field plane using the three-dimensional three-state Potts model. We find that the sign of odd-order susceptibility is opposite in the symmetric (disorder) and broken (order) phases,but that of the even-order one remains positive when it is far away from the phase boundary. When the critical point is approached from the crossover side, negative fourth-order magnetic susceptibility is observable. It is also demonstrated that non-monotonic behavior occurs in the temperature dependence of the generalized susceptibilities of the energy. The finite-size scaling behavior of the specific heat in this model is mainly controlled by the critical exponent of the magnetic susceptibility in the three-dimensional Ising universality class.
作者机构：
[夏巧桥; 张青林] College of Physical Science and Technology, Central China Normal University, Wuhan;430079, China;[胡正文] School of Electronic Information, Wuhan University, Wuhan;430072, China;[夏巧桥; 张青林] 430079, China
通讯机构：
[Zhang, Q.-L.] C;College of Physical Science and Technology, Central China Normal University, Wuhan, China
摘要：
Rational design of magnetic materials with desired magnetic properties has attracted wide interest in recent decades. Herein, we present a new 2D cobalt(II) metal-organic framework, namely [Co(MQ)_2(V_2O_6)_2]_n·4 nH_2O 1, which was hydrothermally synthesized by the reaction of Co(NO_3)_2·4H_2O, N-methyl-4,4′-bipyridinium (MQ+) chlorine salt and NH_4VO_3. Single-crystal X-ray diffraction analysis reveals that 1 crystallizes in C2/c space group with a = 16.290(5), b = 7.815(2), c = 25.297(7) A, β = 108.459(5)°, V = 3054.8(15) A~3, Z = 4, D_c = 1.890 g/cm~3, μ = 1.791 mm~(-1), F(000) = 1748, the final R = 0.0444 and wR = 0.1208 with I > 2σ(I). The individual Co(II) is connected and well separated by diamagnetic [V_2O_6]~(2-) linkers. Magnetic measurements confirm that 1 exhibits ferrimagnetic interactions.
关键词：
High cumulants;statistical uncertainty;statistics;QCD phase transition
摘要：
We study the influence of measured high cumulants of conserved charges on their associated statistical uncertainties in relativistic heavy-ion collisions. With a given number of events, the measured cumulants randomly fluctuate with an approximately normal distribution, while the estimated statistical uncertainties are found to be correlated with corresponding values of the obtained cumulants. Generally, with a given number of events, the larger the cumulants we measure, the larger the statistical uncertainties that are estimated. The error-weighted averaged cumulants are dependent on statistics. Despite this effect, however, it is found that the three sigma rule of thumb is still applicable when the statistics are above one million.
关键词：
stars: neutron;equation of state;magnetic fields
摘要：
We calculate the mass-radius relationship of quark stars with the magnetized density-dependent quark mass model in this work, considering two magnetic field geometries: a statistically isotropic, tangled field and a force-free configuration. In both cases,magnetic field production decreases in the case of maximum quark star mass. Furthermore, a tangled,isotropic magnetic field has a relatively smaller impact on the mass and radius, compared to the force-free configuration,which implies that the geometry of the interior magnetic field is at least as important as the field strength itself when the influence of the strong magnetic field on the mass and radius is assessed.
通讯机构：
[Han, K; Ji, XD] S;[Ji, XiangDong] U;Shanghai Jiao Tong Univ, Shanghai Lab Particle Phys & Cosmol, INPAC, Shanghai 200240, Peoples R China.;Shanghai Jiao Tong Univ, Shanghai Lab Particle Phys & Cosmol, Dept Phys & Astron, Shanghai 200240, Peoples R China.;Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
关键词：
neutrinoless double beta decay;lepton number vlolation;underground experiment;TPC;Micromegas
摘要：
Searching for the neutrinoless double beta decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (particle and astrophysical xenon experiment III) will search for the NLDBD of ~(136)Xe at the China Jin Ping Underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% ~(136)Xe enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct the electron tracks of the NLDBD events and provide good energy and spatial resolution. The detector will be immersed in a large water tank to ensure ～5 m of water shielding in all directions. The second phase, a ton-scale experiment, will consist of five TPCs in the same water tank, with improved energy resolution and better control over backgrounds.
作者机构：
[Luo, Xiaofeng; Xu, Nu] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;[Luo, Xiaofeng; Xu, Nu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China.;[Luo, Xiaofeng] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.;[Xu, Nu] Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
通讯机构：
[Luo, Xiaofeng] C;[Luo, Xiaofeng] U;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.;Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Hubei, Peoples R China.;Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
关键词：
QCD critical point;Fluctuations and correlations;Relativistic heavy-ion collisions;Conserved charges
摘要：
Fluctuations of conserved quantities, such as baryon, electric charge, and strangeness number, are sensitive observables in relativistic heavy-ion collisions to probe the QCD phase transition and search for the QCD critical point. In this paper, we review the experimental measurements of the cumulants (up to fourth order) of event-byevent net-proton (proxy for net-baryon), net-charge and netkaon (proxy for net-strangeness) multiplicity distributions in Au+Au collisions at sNN~(1/2) = 7.7,11.5,14.5,19.6, 27, 39, 62.4, 200 GeV from the first phase of beam energy scan program at the relativistic heavy-ion collider (RHIC). We also summarize the data analysis methods of suppressing the volume fluctuations, auto-correlations, and the unified description of efficiency correction and error estimation. Based on theoretical and model calculations, we will discuss the characteristic signatures of critical point as well as backgrounds for the fluctuation observables in heavy-ion collisions. The physics implications and the future second phase of the beam energy scan (2019–2020) at RHIC will also be discussed.
作者机构：
[Jia, Ya; Qiu, Kang; Wang, Li-Fang] Cent China Normal Univ, Inst Biophys, Wuhan 430079, Peoples R China.;[Jia, Ya; Qiu, Kang; Wang, Li-Fang] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;[Qiu, Kang] Xuzhou Med Univ, Dept Math & Phys, Xuzhou 221004, Peoples R China.
通讯机构：
[Jia, Ya] C;Cent China Normal Univ, Inst Biophys, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
time delays;oscillation;model of bone remodeling
摘要：
In this paper we propose a mathematical model of bone remodeling with time delays of both osteoclast-derived paracrine signaling of tumor and tumor-derived paracrine signaling of osteoclast. The effects of time delays on the growth of tumor cells and bone system are studied in multiple myeloma-induced bone disease. In the case of small osteoclast-derived paracrine signaling, it is found that the growth of tumor cells slows down, the oscillation period of the ratio of osteoclasts to osteoblasts is extended with increasing time delay, and there is a competition between the delay and osteoclast-derived paracrine signaling. In the case of large tumor-derived paracrine signaling, the tumor-derived paracrine signaling can induce a more significant decline in tumor growth for long time delay, and thus slowing down the progression of bone disease. There is an optimal coupling between the tumor-derived paracrine signaling of osteoclasts and time delay during the progressions of bone diseases, which suppresses the tumor growth and the regression of bone disease.
