作者机构：
[Zhang, Yu-Peng; Li, Xiao-Hua; Chen, Xun; Chen, X] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Watanabe, Akira] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, X ] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要：
The differential cross sections of elastic proton-proton (pp) and proton-antiproton (pp<overline> ) scattering are studied in a holographic QCD model, considering the strong and Coulomb interaction in the Regge regime. Based on previous studies of strong interactions described in terms of Pomeron and Reggeon exchange, we add the contribution of Coulomb interaction described by photon exchange. We present the momentum transfer dependence of the contribution rates for each component, especially for the Coulomb-nuclear interference, which refers to the cross term between both interactions. For the adjustable parameters for the strong interaction, we can adopt the values determined in previous studies, and there are no extra adjustable parameters that need to be determined for the Coulomb interaction. It is presented that the resulting differential cross sections are consistent with the data for pp and pp<overline> scattering.
作者机构：
[Pan, Chaohong; Hu, Shulin] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Wang, Lin] Hunan Inst Traff Engn, Basic Dept, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, L ] H;Hunan Inst Traff Engn, Basic Dept, Hengyang 421001, Peoples R China.
关键词：
asymptotic behavior;Lotka–Volterra model;three species;global stability;weighted functional space
摘要：
The stability of traveling waves for the Lotka-Volterra competition system with three species is investigated in this paper. Specifically, we first show the asymptotic behavior of traveling wave solutions and then establish the local stability and the global stability under the weighted functional space. For local stability, the spectrum approach is used, while for global stability, the comparison principle and squeezing theorem are combined.
期刊：
Journal of Radioanalytical and Nuclear Chemistry,2023年332(2):243-250 ISSN：0236-5731
通讯作者：
Zhenghua Xu<&wdkj&>Yong Liu
作者机构：
[Lin, Dongying; Chen, Yifan; Dai, Xingwang; Yan, Chengyan; Song, Juan; Li, Xiangyang] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Xu, Zhenghua] Univ South China, Sch Math & Sci, Hengyang 421001, Hunan, Peoples R China.;[Liu, Yong; Li, Xiangyang] Hunan Prov Engn Technol Res Ctr Uranium Tailings T, Hengyang 421001, Hunan, Peoples R China.;[Liu, Yong; Li, Xiangyang] Hunan Prov Engn Res Ctr Radioact Control Technol U, Hengyang 421001, Hunan, Peoples R China.;[Liu, Yong] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Guangdong, Peoples R China.
通讯机构：
[Zhenghua Xu] S;[Yong Liu] H;School of Mathematics and Science, University of South China, Hengyang, China<&wdkj&>Hunan Province Engineering Technology Research Centre of Uranium Tailings Treatment Technology, Hengyang, China<&wdkj&>Hunan Province Engineering Research Centre of Radioactive Control Technology in Uranium Mining and Metallurgy, Hengyang, China<&wdkj&>College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China
摘要：
Soil cohesion can be improved with reinforcement treatment. Glass fiber, polypropylene fiber, jute, and other commonly used organic and inorganic fiber materials were used as experimental materials to investigate the effect of reinforcement fiber type and dosage on radon exhalation in uranium tailings overlying soil under high temperature environment, and soil samples with different fiber types and dosages were prepared for radon exhalation test. The correlation analysis method was used to investigate the relationship between the radon exhalation law and the type and amount of reinforcing fibers in the overburden, and a linear function was constructed between the radon exhalation rate and the type and amount of reinforcing fibers. The results show that the radon exhalation rate of the jute reinforcement treatment is the lowest under the same dosage, followed by the polypropylene reinforcement treatment, and the effect of the glass fiber reinforcement treatment is the worst, but the radon exhalation rate of all treatments is high. In plain soil, increasing the fiber reinforcement reduces the degree of soil cracking and the rate of radon exhalation. When the material source and cost are taken into account, the jute reinforcement treatment can achieve a lower radon exhalation rate.
期刊：
BRIEFINGS IN BIOINFORMATICS,2023年24(6) ISSN：1467-5463
通讯作者：
Chen, YP;Lin, WB
作者机构：
[Li, Zhe; Tu, Xinyi] Univ South China, Sch Comp, Hengyang, Peoples R China.;[Chen, Yuping; Chen, YP] Univ South China, Sch Pharm, Hengyang 421001, Peoples R China.;[Lin, Wenbin; Lin, WB] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, WB ; Chen, YP ] U;Univ South China, Sch Pharm, Hengyang 421001, Peoples R China.;Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
关键词：
drug–drug interaction;pre-taining;heterogeneous graph neural network;multi-source information
摘要：
The simultaneous use of two or more drugs due to multi-disease comorbidity continues to increase, which may cause adverse reactions between drugs that seriously threaten public health. Therefore, the prediction of drug-drug interaction (DDI) has become a hot topic not only in clinics but also in bioinformatics. In this study, we propose a novel pre-trained heterogeneous graph neural network (HGNN) model named HetDDI, which aggregates the structural information in drug molecule graphs and rich semantic information in biomedical knowledge graph to predict DDIs. In HetDDI, we first initialize the parameters of the model with different pre-training methods. Then we apply the pre-trained HGNN to learn the feature representation of drugs from multi-source heterogeneous information, which can more effectively utilize drugs' internal structure and abundant external biomedical knowledge, thus leading to better DDI prediction. We evaluate our model on three DDI prediction tasks (binary-class, multi-class and multi-label) with three datasets and further assess its performance on three scenarios (S1, S2 and S3). The results show that the accuracy of HetDDI can achieve 98.82% in the binary-class task, 98.13% in the multi-class task and 96.66% in the multi-label one on S1, which outperforms the state-of-the-art methods by at least 2%. On S2 and S3, our method also achieves exciting performance. Furthermore, the case studies confirm that our model performs well in predicting unknown DDIs. Source codes are available at https://github.com/LinsLab/HetDDI.
作者机构：
School of Mathematics and Physics, University of South China, Hengyang, China;Department of Foundation, Hunan Institute of Traffic Engineering, Hengyang, China;School of Resource Environment and Safety Engineering, University of South China, Hengyang, China;[刘俊; 谭捷] School of Mathematics and Physics,University of South China,Hengyang 421001,China;[胡芳] School of Resource Environment and Safety Engineering,University of South China,Hengyang 421001,China
通讯机构：
[Jie Tan; Fang Hu] S;School of Mathematics and Physics, University of South China, Hengyang, China<&wdkj&>School of Resource Environment and Safety Engineering, University of South China, Hengyang, China
通讯作者：
R. Moradi<&wdkj&>J. A. Rueda<&wdkj&>R. Ruffini
作者机构：
Fesenkov Astrophysical Institute, Observatory 23, Almaty, Kazakhstan;ICRANet, Piazza della Repubblica 10, Pescara, Italy;Escuela de F´ısica, Universidad Industrial de Santander, A.A.678, Bucaramanga, Colombia;ICRA, Dipartamento di Fisica, Sapienza Università di Roma, Rome, Italy;Universit´e de Nice Sophia-Antipolis, Grand Château Parc Valrose, Nice, France
通讯机构：
[R. Moradi; J. A. Rueda; R. Ruffini] I;ICRANet, Piazza della Repubblica 10, Pescara, Italy<&wdkj&>ICRA, Dipartamento di Fisica, Sapienza Università di Roma, Rome, Italy<&wdkj&>INAF, Osservatorio Astronomico d’Abruzzo, Teramo, Italy<&wdkj&>ICRANet, Piazza della Repubblica 10, Pescara, Italy<&wdkj&>ICRA, Dipartamento di Fisica, Sapienza Università di Roma, Rome, Italy<&wdkj&>INAF, Istituto di Astrofisica e Planetologia Spaziali, Rome, Italy<&wdkj&>ICRANet-Ferrara, Dip. di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Ferrara, Italy<&wdkj&>Dipartamento di Fisica e Scienze della Terra, Università degli Studi di Ferrara, Ferrara, Italy<&wdkj&>ICRANet, Piazza della Repubblica 10, Pescara, Italy<&wdkj&>ICRA, Dipartamento di Fisica, Sapienza Università di Roma, Rome, Italy<&wdkj&>Universit´e de Nice Sophia-Antipolis, Grand Château Parc Valrose, Nice, France<&wdkj&>INAF, Rome, Italy
关键词：
gamma-ray bursts
摘要：
Long gamma-ray bursts (GRBs), in a few seconds, release luminosities (in gamma-rays) comparable to the luminosity of all stars in the observable Universe, which makes them detectable to the dawn of galaxy and stellar formation. One of the most striking observational properties of some of these sources is that they are accompanied by a supernova (SN) of type Ic, traditionally called GRB-SN association or connection. The GRB-SN association, probably the most constraining property of GRB theoretical models, is the subject of this article.
摘要：
The effective one-body method provides a framework to apply the black hole perturbation theory to the binary system where two masses can be comparable. We study the gravitational-wave equation in the background of the effective one-body system for the spinless binary, which is in general available with the spherically symmetric background as well. We obtain the gauge conditions for the decoupled wave equation, and also give the solutions to the gauge conditions in terms of the metric perturbation for a special case, which extends the result by Jing et al. (Sci. China-Phys. Mech. Astron. 65, 260411 (2022)). Finally we obtain the gravitational-wave equation which is the generalization of the Teukolsky equation.
摘要：
We present a novel monotone finite volume element scheme for the diffusion problem on triangular grids. Firstly, one fictitious triangular element is introduced for each edge of any element, and another vertex of this fictitious element is on the outward extended straight line passing through two points: The vertex opposite to this edge and the barycenter of the element. The diffusive tensor and the solution in this element are continuously extended to its corresponding fictitious element. The fictitious element and the continuous extension not only avoid the phenomenon that the control volume segment passes through other elements, but also are helpful to the construction and theoretical analysis for our monotone scheme. Secondly, one new nonlinear two-point flux formulation is obtained for some part control volume edge whose another endpoint is the barycenter of the fictitious element, and this straight segment crosses through the common edge of the triangular element and its fictitious one. The approximation of & UKappa; backward difference u on this straight control volume edge is constructed by some weighted average with the gradients of two finite element functions, and the weighted coefficients are determined by the nonlinear two-point flux idea. Furthermore, we proved that the new scheme is monotone under some conditions: the diffusion tensor and exact solution functions are properly smooth, and the partition step size h is properly small, and the solutions on three nodes of any element are not nonnegative, and furthermore not simultaneously zero, and the nodes of the fictitious element are properly chosen. We also proved that the corresponding coefficient matrix is of M-matrix. Finally, we carry on some typical experiments. Numerical results verify the monotonicity of this new scheme, and confirm its accuracy and stability.(C) 2022 Elsevier B.V. All rights reserved.
作者机构：
[Zhou, Nan] Univ South China, Sch Nucl Sci & Technol, Hengyang, Peoples R China.;[Wu, Xijun; Cheng, Jinjuan; Qin, Yong] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Liu, Wenguan] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai, Peoples R China.
通讯机构：
[Xijun Wu; Jinjuan Cheng] S;School of Mathematics and Physics, University of South China, Hengyang, People’s Republic of China<&wdkj&>School of Mathematics and Physics, University of South China, Hengyang, People’s Republic of China
关键词：
Nuclide;adsorption;membrane separation;porous graphene oxide;density functional theory
摘要：
This work simulates radionuclides enrichment and separation from radioactive wastewater through functionalised porous graphene oxide (PGO) with a six-membered ring hole structure and hydroxyl (-OH) functional groups, using density functional theory (DFT). Cs, Ag, and Co in particular are selected for theoretical simulations in order to better understand the separation mechanism from the radioactive wastewater. The results demonstrate that, except for Co, the adsorption energy of nuclides on PGO membranes is higher than on perfect graphene membranes, and that the adsorption of Ag shifts from physisorption to chemisorption. Cs has a higher energy barrier than Co or Ag. It cannot permeate the PGO membrane and only concentrates on the surface. The separation of Cs from other nuclides using a PGO membranes is attributed mainly to the strong electronic coupling between hydroxyl functional groups and Cs. It is found, in addition, that the adsorption performance of the PGO membranes for Co and Ag decreases with increasing temperature, but has relatively stable adsorption for Cs. These research results demonstrate that a PGO membrane containing six-membered ring holes can effectively screen Cs from radioactive wastewater.
摘要：
In the present study, we deal with the stability and the onset of Hopf bifurcation of two type delayed BAM neural networks (integer-order case and fractional-order case). By virtue of the characteristic equation of the integer-order delayed BAM neural networks and regarding time delay as critical parameter, a novel delay-independent condition ensuring the stability and the onset of Hopf bifurcation for the involved integer-order delayed BAM neural networks is built. Taking advantage of Laplace transform, stability theory and Hopf bifurcation knowledge of fractional-order differential equations, a novel delay-independent criterion to maintain the stability and the appearance of Hopf bifurcation for the addressed fractional-order BAM neural networks is established. The investigation indicates the important role of time delay in controlling the stability and Hopf bifurcation of the both type delayed BAM neural networks. By adjusting the value of time delay, we can effectively amplify the stability region and postpone the time of onset of Hopf bifurcation for the fractional-order BAM neural networks. Matlab simulation results are clearly presented to sustain the correctness of analytical results. The derived fruits of this study provide an important theoretical basis in regulating networks.
作者机构：
[Lin, Wenbin; He, Guansheng; Jiang, Chunhua; Yang, Bo] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Lin, Wenbin; He, Guansheng; Jiang, Chunhua; Yang, Bo] Hunan Key Lab Math Modeling & Sci Comp, Hengyang 421001, Peoples R China.;[Yang, Bo] Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China.;[Lin, Wenbin] Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Peoples R China.
通讯机构：
[Wenbin Lin] H;Hunan Key Laboratory of Mathematical Modeling and Scientific Computing, Hengyang 421001, China<&wdkj&>School of Mathematics and Physics, University of South China, Hengyang 421001, China<&wdkj&>School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
We present the post-Newtonian solution for the quasi-Keplerian motion of a charged test particle in the field of Reissner-Nordstrom black hole under the Wagoner-Will-Epstein-Haugan representation. The explicit formulations for the charge effects on perihelion precession and the orbital period are achieved, which may be useful not only in the comparisons with astronomical observations but also in calculating the waveform of the gravitational wave from this kind of system.
期刊：
NEW JOURNAL OF CHEMISTRY,2022年46(19):9222-9228 ISSN：1144-0546
通讯作者：
Wang, Meng;Xiao, DT
作者机构：
[He, Zhengzhong; Xiao, Detao; Deng, Xiangyuan; Wang, Meng; Yu, Bo; Wu, Haibiao; Xiao, DT] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[He, Zhengzhong; Xiao, Detao; Deng, Xiangyuan; Yu, Bo; Wu, Haibiao; Xiao, DT] Univ South China, Radon Key Lab Hunan Prov, Hengyang 421001, Hunan, Peoples R China.;[Deng, Xiangyuan] Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Wang, M; Xiao, DT ] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;Univ South China, Radon Key Lab Hunan Prov, Hengyang 421001, Hunan, Peoples R China.
摘要：
Radon (Rn) is a universally known indoor radioactive gas that poses a significant threat to human health. Activated carbon (AC) is the only commercial Rn adsorbent; its adsorption performance is extremely limited due to too few micropores. A series of nickel nanoparticles supported on AC (Ni/AC) composites, combining abundant micropores with open metal sites, is rationally designed for adsorbing Rn via a two-step process consisting of impregnation and high-temperature reduction. The Rn adsorption performance of the Ni/AC composites is obviously improved due to the introduction of nickel nanoparticles. The adsorption coefficient of Ni/AC calcined at 800 degrees C reaches 6.56 +/- 0.14 m(3) kg(-1) at 25 degrees C and 1 bar, 48% higher than that of AC. The Ni/AC Rn adsorption coefficient is similar over five cycles. The fine and homogeneous dispersion of nickel nanoparticles, the appropriate chemical state of nickel and the high content of Ni-0 synergistically promote Rn adsorption on Ni/AC. Experiments verify that Ni/AC composites are a promising candidate for the adsorption of Rn in the atmospheric environment.
摘要：
We construct a new type of Chandrasekhar transformation in Kerr spacetime using the different tortoise coordinate, which is useful for exact analysis to study the Teukolsky equation with arbitrary frequency. We also give the interpretation of our transformation using the formalism of the quantum Seiberg-Witten geometry.
作者机构：
[Zhang, Xiaoyang; Tan, Shifeng; Hu, Heping] Univ South China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Yang, Bao; Tang, Liqun] South China Univ Technol, Sch Civil Engn & Transportat, Dept Engn Mech, Guangzhou 510641, Guangdong, Peoples R China.;[Yang, Bao; Tang, Liqun] South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510641, Guangdong, Peoples R China.
通讯机构：
[Tang, LQ ] S;South China Univ Technol, Sch Civil Engn & Transportat, Dept Engn Mech, Guangzhou 510641, Guangdong, Peoples R China.;South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510641, Guangdong, Peoples R China.
关键词：
Size irregularity gradient;Gradient metal foam;Theoretical model;Deformation mechanism;Compressive properties
摘要：
Size irregularity gradient and cell wall gradient, combined as the density gradient in previous studies, affect the macroscopic mechanical properties of the gradient metal foam. More and more complex mesostructures are designed and applied in metal foams, and the density gradient becomes insufficient to describe the difference in mesostructures. To explore the effect of mesostructures carefully, this study focuses on the effect of the size irregularity gradient on the macroscopic compressive properties of metal foams. A series of metal foam models were developed using the 3D Voronoi technique. These models have the same average relative densities, the same average diameters and different size irregularity gradients. Simulation results indicated that the macroscopic mechanical properties of cell wall gradient metal foams are significantly different from those of size irregularity gradient metal foams, though these models have the same relative density gradient. To explore the effect of size irregularity gradient, a theoretical model was developed to characterize the compression process from the first cell-collapse to full condensation. Theoretical results showed a linear relationship between the nominal stress and the current relative density. These findings can provide efficient guidance for the design and applications of gradient metal foams.
作者机构：
[Lin, Wenbin; He, Guansheng] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Lin, Wenbin; He, Guansheng] Hunan Key Lab Math Modeling & Sci Comp, Hengyang 421001, Peoples R China.;[Lin, Wenbin] Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Peoples R China.
摘要：
The gravitational lensing of relativistic neutral massive particles caused by a Kerr-Newman black hole is investigated systematically in the weak-field limit. Based on the Kerr-Newman metric in Boyer-Lindquist coordinates, we first derive the analytical form of the equatorial gravitational deflection angle of a massive particle in the third post-Minkowskian approximation. The resulting bending angle, which is found to be consistent with the result in the previous work, is adopted to solve the popular Virbhadra-Ellis lens equation. The analytical expressions for the main observable properties of the primary and secondary images of the particle source are thus obtained beyond the weak-deflection limit, within the framework of standard perturbation theory. The observables include the positions, magnifications, and gravitational time delays of the individual images, the differential time delay, and the total magnification and centroid position. The explicit forms of the correctional effects induced by the deviation of the initial velocity of the massive particle from the speed of light on the observables of the lensed images are then achieved. Finally, serving as an application of the formalism, the supermassive black hole at the Galactic Center, Sagittarius A* , is modeled to be a Kerr-Newman lens. The magnitudes of the velocity-induced correctional effects on the practical lensing observables as well as the possibilities to detect them in this scenario are also analyzed.
