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Finite-Nuclei Properties in Relativistic Density Dependent Hartree-Fock Approach

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Chinese Physics Letters 1995年第2期12卷 72-75页

作者： ma zhongyu SHI Hualin CHEN Baoqiu Institute of Atomic Energy Beijing 102413 Visit Professor of Institute of Theoretical Physics Beijing 100080

Finite nucleus properties are studied in a relativistic effective interaction *** dependent coupling constants of the meson-nucleon interactions are adopted to incorporate the relativistic Brueckner-Har tree-Fock results in the relativistic mean field(RMF)or relativistic Hartree-Fock(RHF)*** is desired to remedy the deficiencies of RMF and RHF without losing the features of the relativistic G matrix and at the same time retain the *** calculated ground state properties with the density dependent coupling constants are in a good agreement with *** contribution of isovector mesons in RHF is discussed.

关键词： relativistic Hartree Finite

Vacuum Corrections for Nuclear matter in Weak Momentum Dependence of Self-Energy

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Chinese journal of nuclear physics 1994年第2期16卷 95-99页

作者： Wang, Zisheng ma, zhongyu Cai, Dunjiu China Inst of Atomic Energy Beijing China

-The contributions of vacuum fluctuations to energy density in a weak momen-tum dependence of self-energy are calculated in Walecka *** adjusting modelparameters and introducing momentum dependent form factors at meson-nucleonvertices to reproduce the empirical nuclear matter saturation properties,Hartree-Fockresults including vacuum effects at low to moderate densities are similar to those in therelativistic Hartree approximation.

关键词： Vacuum corrections Hartree-Fock approximation Saturation properties Effective nucleon mass Form factors

What kind of optical model potentials should be used for deuteron stripping reactions?

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 64-70页

作者： XiaoYan Yun DanYang Pang YiPing Xu Zhi Zhang RuiRui Xu zhongyu ma CenXi Yuan Yuan51School of Physics Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear materials and Physics Beihang UniversityBeijing 100191China China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China China Institute of Atomic Energy Beijing 102413China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

This paper presents the results of a study that compares CTOM, a microscopic optical model potential(OMP), which is an optical model co-created by the China Nuclear Data Center & Tuebingen University, to CH89, which is a typical phenomenological *** respective OMPs were tested by applying them to the modelling of nucleon elastic scattering and(d,p) transfer reactions involving14C,36S, and58Ni targets at both low and relatively high energies. The results demonstrated that although both potentials successfully accounted for the angular distributions of both the elastic scattering and transfer cross sections, the absolute values of the transfer cross sections calculated using CTOM were approximately 25% larger than those calculated using CH89. This increased transfer cross sections allowed CTOM to produce single particle strength reduction factors for the three reactions that were consistent with those extracted from(e,e′p) reactions as well as with more recent(p,2p) and(p,pn) reactions. Notch tests suggested that nucleon elastic scattering and transfer reactions are sensitive to different regions of the OMP;accordingly,phenomenological OMPs, which are constrained only by elastic scattering cross sections, may not be sufficient for nucleon transfer reactions. Therefore, we suggest that microscopic OMPs, which reflect more theoretical considerations, should be preferred over phenomenological ones in calculations of direct nuclear reactions.

关键词： optical model potentials elastic scattering transfer reactions spectroscopic factors

Robustness-supported user association and small cell switching ON/OFF strategies in 5G mm-wave networks

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High Technology Letters 2020年第1期26卷 8-16页

作者： ma zhongyu Li Bo Yan Zhongjiang Yang mao School of Electronics and Information Northwestern Polytechnical UniversityXi'an 710129P.R.China School of Electronic Information Engineering Lanzhou Institute of TechnologyLanzhou 730050P.R.China

The problem of robustness-supported user association and small cell station(SCS) switching ON/OFF strategies in 5G millimeter wave(mm-wave) networks is investigated, where the robustness of access links is ensured and the number of active SCSs is minimized for the reduction of the aggregation power consumption. Firstly, the problem is formulated as an integer programming(IP) problem. Then the problem is proved as a NP-hard problem by means of the simplification into the minimum dominant set(MDS), which is a NP-hard problem and is intractable to be solved in polynomial time. Secondly, a greedy-idea-based heuristic algorithm(GIHA) is proposed under the consideration of the complexity of the original optimization problem. Finally, superiorities of GIHA are demonstrated with the extensive simulations in 60 GHz mm-wave ultra-dense network in terms of access robustness and aggregate power consumption.

关键词： millimeter wave(mm-wave) user allocation minimum dominating set robustness-supported

In-depth understanding of transport behavior of sulfided nano zerovalent iron/reduced graphene oxide@guar gum slurry: Stability and mobility

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Journal of Environmental Sciences 2024年第10期144卷 1-14页

作者： Yuheng ma Wenhui You Zijiang Yang zhongyu Ren Qi Jing Faculty of Architecture Civil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China

Nanoscale zero-valent iron(NZVI),which has the advantages of small particle size,large specific surface area,and high reactivity,is often injected into contaminated aquifers in the form of ***,the prone to passivation and agglomeration as well as poor stability andmobility of NZVI limit the further application of this technology in ***,sulfided NZVI loaded on reduced graphene oxide(S-NZVI/rGO)and guar gum(GG)with shearthinning properties as stabilizers were used to synthesize S-NZVI/rGO@GG ***,TEM,and FT-IR confirmed that the dispersion and anti-passivation of NZVI were optimized in the coupled *** stability and mobility of the slurry were improved by increasing the GG concentration,enhancing the pH,and decreasing the ionic strength and the presence of Ca^(2+)ions,respectively.A modified advection-dispersion equation(ADE)was used to simulate the transport experiments considering the strain and physicochemical deposition/***,colloidal filtration theory(CFT)demonstrated that Brownian motion plays a dominant role in themigration of S-NZVI/rGO@GG slurry,and the maximummigration distance can be increased by appropriately increasing the injection ***-Derjaguin-Landau-Verwey-Overbeek(XDLVO)theory showed that the excellent stability and migration of S-NZVI/rGO@GG slurry mainly came from the GG spatial *** study has important implications for the field injection of S-NZVI/rGO@GG *** to the injection parameters,the injection range of S-NZVI/rGO@GG slurry is effectively controlled,which lays the foundation for the promotion of application in actual fields.

关键词： S-NZVI rGO Guar gum Transport Stability

Building a Modern Economic System to Support High-Quality Development

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Qiu Shi 2018年第4期10卷 109-111页

作者： ma zhongyu State Information Center

Building a modern economic system is essential if China's economy is to transition from a phase of rapid growth to a stage of high-quality *** represents an urgent need to transform the growth model,optimize the econo... 详细信息

关键词： Modern Economic System Development

MICROSCOPIC RELATIVISTIC DESCRIPTION OF OPTICAL MODEL POTENTIAL

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Chinese Physics Letters 1987年第3期4卷 117-120页

作者： ma zhongyu ZHU Ping GU Yingqi ZHUO Yizhong Institute of Atomic Energy Beijing

The microscopic relativistic optical potentials in energy region of E<300MeV have been studied and *** effective Lagrangian density with tDo adjustable coupling constants(gσ,gω)is chosen by reproducing the bulk prop... 详细信息

The microscopic relativistic optical potentials in energy region of Ematter in the Dzrac-Hartree-Fock(DHF)***-is found that the optical potential calculated in this model zs-in good agreement with those obtained by phenomenological fitting up to the energy of 300MeV.

关键词： approximation. Hartree constants

LDformer:a parallel neural network model for long-term power forecasting

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信息与电子工程前沿:英文版 2023年第9期24卷 1287-1301页

作者： Ran TIAN Xinmei LI zhongyu ma Yanxing LIU Jingxia WANG Chu WANG College of Computer Science&Engineering Northwest Normal UniversityLanzhou 730070China

Accurate long-term power forecasting is important in the decision-making operation of the power grid and power consumption management of customers to ensure the power system’s reliable power supply and the grid economy’s reliable ***,most time-series forecasting models do not perform well in dealing with long-time-series prediction tasks with a large amount of *** address this challenge,we propose a parallel time-series prediction model called ***,we combine Informer with long short-term memory(LSTM)to obtain deep representation abilities in the time ***,we propose a parallel encoder module to improve the robustness of the model and combine convolutional layers with an attention mechanism to avoid value redundancy in the attention ***,we propose a probabilistic sparse(ProbSparse)self-attention mechanism combined with UniDrop to reduce the computational overhead and mitigate the risk of losing some key connections in the *** results on five datasets show that LDformer outperforms the state-of-the-art methods for most of the cases when handling the different long-time-series prediction tasks.

关键词： Long-term power forecasting Long short-term memory(LSTM) UniDrop Self-attention mechanism

Symmetry Energy and Isovector Giant Dipole Resonance in Finite Nuclei

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2007年第1期 25-26页

作者： Cao Ligang ma zhongyu 不详 China Institute of Atomic Energy Beijing China.