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A Reliability Analysis of Calculated Results for Odd-Even and Odd-Odd Nuclei in Relativistic Mean-Field Theory

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Communications in Theoretical Physics 2006年第1X期46卷 113-118页

作者： ding Bin-gang ZHANG Da-Li LU ding-Hui School of Science Huzhou Teachers College Huzhou 313000 China Institute of Modern Physics Zhejiang University Hangzhou 310027 China

We calculate the binding energies of Ni, Cu, Xe, Cs, Pt, Au, Np, Pu isotope chains using two interaction parameter sets NL-3 and NL-Z, and compared the relative errors of the even-even nuclei with those of odd-even nuclei and odd-odd nuclei. We find that the errors of binding energy of odd-even and odd-odd nuclei are not bigger than the one of even-even nuclei. The result shows that comparing with even-even nuclei, there is no systematic error and approximation in the calculations of the binding energy of odd-even and odd-odd nuclei with relativistic mean-field theory. In addition, the result is explained theoretically.

关键词： relativistic mean-field theory binding energy even-even nuclei odd-even nuclei odd-odd nuclei

Terminal sliding mode control based on super-twisting algorithm

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Journal of Systems Engineering and Electronics 2017年第1期28卷 145-150页

作者： Zhanshan Zhao Hongru Gu Jing Zhang gang ding School of Computer Science and Software Engineering Tianjin Polytechnic UniversityTianjin 300387China School of Textiles Tianjin Polytechnic UniversityTianjin 300387China Tianjin Vocational Institute Tianjin 300410China Tianjin Radio&TV University Tianjin 300191China

An improved non-singular terminal sliding mode control based on the super-twisting algorithm is proposed for a class of second-order uncertain nonlinear systems. This method can effectively avoid the singularity problem and obviously reduce the chattering phenomenon. The stability of the proposed procedure is proven to be finite-time convergence using the Lyapunov theory against uncertain unmodeled dynamic and external disturbances. An example is given to show the proposed improved non-singular terminal sliding mode control (SMC) law effectively. © 1990-2011 Beijing Institute of Aerospace Information.

关键词： Nonlinear control systems Nonlinear systems

New Theoretical Approach Integrated Education and Technology

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Frontiers of Education in China 2010年第1期5卷 26-36页

作者： gang ding School of Educational Science East China Normal UniversityShanghai 200062China

The paper focus on exploring new theoretical approach in education with development of online learning technology,from e-learning to u-learning and virtual reality technology,and points out possibilities such as constructing a new teaching ecological system,ubiquitous educational awareness with ubiquitous technology,and changing the cognitive mode in learning process with virtual reality ***,the paper concerns effective approach to promote school-based teachers professional development through integrated ICT and classroom teaching.

关键词： educational technology ubiquitous learning cognitive mode teacher professional development

Systematic Study on Triaxial Superdeformed Bands of Hf Isotopes

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Communications in Theoretical Physics 2009年第1期51卷 126-130页

作者： ZHANG Da-Li ding Bin-gang Department of Physics Huzhou Teacher＇s College Huzhou 313000 China

Properties of the triaxiai superdeformed （TSD） bands of Hf isotopes are investigated systematicaily within the supersymmetry scheme including many-body interactions and a perturbation possessing the SO（5）（or SU（5）） symmetry on the rotational symmetry. Quantitatively good results of the γ-ray energies, the dynamical moments of inertia, and the spin of the TSD bands in Hf isotopes are obtained. It shows that this approach is quite powerful in describing the properties of the triaxial superdeformation in Hf isotopes.

关键词： triaxial superdeformed bands dynamical moments of inertia Hf isotopes

Level Structure of 83Rb in the Projected Shell Model

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Communications in Theoretical Physics 2002年第10期38卷 465-469页

作者： ding Bin-gang SHEN Shui-Fa Huzhou Teachers College Huzhou 313000 China Shanghai Institute of Nuclear Research the Chinese Academy of Sciences Shanghai 201800 China

The projected shell model is applied to the odd-proton nucleus 83 Rb. The results of theoretical calculationsabout the excited positive-parity yrast states and the negative-parity ground-state band are compared with experimentaldata, and the best reproduction of the experiment has been given by this model. In addition, a band diagram calculatedfor the negative-parity g.s. band is also shown in order to extract physics out of the numerical results.

关键词： projected shell model, yrast state, quadrupole deformation

Description of the Rigid Triaxial Deformation at Low Energy in 76Ge with the Proton-Neutron Interacting Model IBM2

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Chinese Physics Letters 2013年第12期30卷 21-24页

作者： ZHANG Da-Li ding Bin-gang Department of Physics Huzhou Teacher's CollegeHuzhou 313000

We investigate properties of the low-lying energy states for 76Ge within the framework of the proton-neutron interacting model IBM2,considering the validity of the Z=38 subshell closure 88Sr50 as a doubly magic *** introducing the quadrupole interactions among like bosons to the IBM2 Hamiltonian,the energy levels for both the ground state andγbands are reproduced ***,the doublet structure of theγband and the energy staggering signature fit the experimental data *** ratios of B(E2)transition strengths for some states of theγband,and the g factors of the 2^(+)_(1),2^(+)_(2) states are very close to the experimental *** calculation result indicates that the nucleus exhibiting rigid triaxial deformation in the low-lying states can be described rather well by the IBM2.

关键词： IBM2 states closure

Description of the Chiral Doublet Bands in ^(135)Nd and ^(136)Nd

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Chinese Physics Letters 2011年第5期28卷 76-79页

作者： ZHANG Da-Li ding Bin-gang Department of Physics Huzhou Teacher’s CollegeHuzhou 313000

The chiral doublet bands in^(135)Nd and^(136)Nd are investigated systematically within the supersymmetry scheme including many-body interactions and possessing the SO(5)(or SU(5))symmetry on the rotational *** good results of the energy spectra,the energy staggering parameter as a function of the spin and the spin assignment are *** calculation shows that the stronger competition between the pairing and anti-pairing effects exists in these chiral doublet bands and the SU(3)symmetry breaking more seriously exists in the stable chiral structure.

关键词： structure symmetry chiral

Friction and wear properties of Cu-based self-lubricating composites in air and vacuum conditions

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Acta Metallurgica Sinica(English Letters) 2012年第5期25卷 391-400页

作者： Shiyin HUANG Yi FENG Kewang ding gang QIAN Hongjuan LIU Yang WANG Department of Material Science and Engineering Hefei University of Technology Hefei 230009 China

Cu-based self-lubricating materials containing two different solid lubricants （graphite and MoSs） were fabricated by P/M hot pressing techniques. Physical and mechan- ical properties of the samples were examined. The effects of graphite and MoSs contents on friction coefficient and wear rate were investigated by a ring-on-disc wear machine in air and vacuum conditions, respectively. Tribo-films formed on the worn surfaces were characterized by scanning electron microscopy （SEM） and X-ray photo- electron spectroscopy （XPS）. The results indicated that density, hardness and bending strength all increased with the increasing content of MoS2, while the relative density was opposite. Sample B containing 15 vol. pct graphite and 15 vol. pct MoS2 pos- sessed superior tribological properties both in air and vacuum conditions. However, the tribo-films formed on the worn surfaces of the sample B were greatly discrepant in composition at different testing conditions. In air, the volume ratio of MoS2 and graphite in the tribo-films is 0.31：1 whereas the ratio in vacuum is 1.07：1.

关键词： Self-lubricating composite Air and vacuum conditions Frictioncoefficient Wear rate Synergistic effect

Periodontal Ligament Stem Cells Reverse the High Glucose Level-Induced Inflammatory State of Macrophages

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Biomedical and Environmental Sciences 2022年第7期35卷 674-679页

作者： LIU Yun Xia ding Xiao Ling TANG Shuai CUI Shu Yue LIU Jia Jia ding gang School of Stomatology Weifang Medical UniversityWeifang 261053ShandongChina Clinical Competency Training Center Weifang Medical UniversityWeifang 261053ShandongChina

Periodontitis is a chronic infectious disease characterized by plaque biofilm as its main pathogenic factor;its clinical manifestations include gingival inflammation,alveolar bone resorption,attachment loss,and periodontal pocket formation,all of which eventually lead to tooth loss and seriously affect the quality of life of patients[1].This illness has a close relationship with blood sugar levels in patients with diabetes and is one of the most important complications of diabetes[2].Macrophages are an important part of host immune responses and exhibit powerful functions of identifying,phagocytizing,and removing bacteria;macrophage polarization is involved in the pathogenesis of periodontitis[3].

关键词： inflammation removing eventually