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学术界 2019年第2期 217-232页

作者： Zhang Xiaobing Zhang Guoyi Anhui vocational collage of City Management Shanghai University of International Business and Economics

Contributions of Overseas Chinese Merchants in South Seas to the Development of Shanghai's International Trade in Modern

关键词： Overseas Chinese Merchants in South Seas Shanghai International Trade

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Condensation of Self-Driven Particles in Scale-Free Networks

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Chinese Physics Letters 2010年第2期27卷 326-329页

作者：沈静 Department of Mechanical and Electrical Engineering Yancheng Mechanical and Electrical of Higher Vocational-Technical School Yancheng 224000

A new simple model of self-driven particles in scale-free networks is introduced to understand the emergence of condensation in the natural world. In the model, at each time step, particles are driven to choose their next habitats according to the particle numbers at both the present habitats and neighbors. It is found that the hub effect results in the condensation. The present numerical results as well as the theoretical analysis of condensation transition show the criterion of condensation. Both simulations and theoretical analysis display that there are three phases for different hopping probabilities δ： non-condensation （δ〈δc）, partial condensation （δc≤ δ〈1）, and complete condensation （δ≥δc＇= 1）, and the mean occupation particle number at the stationary state is also obtained. Moreover, the noise effect on self-driven particles is studied, and it makes particle numbers at nodes tend towards being identical.

关键词： Computational physics Statistical physics and nonlinear systems

Electromagnetic properties of the Pc(4312) pentaquark state

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Chinese Physics C 2021年第2期45卷 341-350页

作者： UlaşÖzdem Health Services vocational School of higher Education Istanbul Aydin UniversitySefakoy-Kucukcekmece34295 IstanbulTurkey

Using the light-cone QCD sum rules,we evaluate the magnetic moment of the P_c(4312) pentaquark state by considering both the \bar D\Sigma_c molecular and diquark-diquark-antiquark state,with quantum numbers J^P=2/1^(-1).In the calculations,we use the diquark-diquark-antiquark and molecular form of the interpolating currents for the P_(c4312) pentaquark and the distribution amplitudes of the *** numerical results for the magnetic moment obtained using the two different pictures are quite different from each other,which can be used to pin down the underlying structure of P_(c4312) .Any experimental measurement of the magnetic moment in the near future will provide an understanding of the internal structure of this pentaquark state.

关键词： pentaquarks magnetic moment molecular picture diquark-diquark-antiquark picture

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Three-to-one internal resonance in multiple stepped beam systems

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Applied Mathematics and Mechanics(English Edition) 2009年第9期30卷 1131-1142页

作者： A. Tekin E. zkaya S. M. Bagdatlh Technical vocational School of higher Education Celal Bayar University Department of Mechanical Engineering Celal Bayar University

In this study, the vibrations of multiple stepped beams with cubic nonlinearities are considered. A three-to-one internal resonance case is investigated for the system. A general approximate solution to the problem is found using the method of multiple scales （a perturbation technique）. The modulation equations of the amplitudes and the phases are derived for two modes. These equations are utilized to determine steady state solutions and their stabilities. It is assumed that the external forcing frequency is close to the lower frequency. For the numeric part of the study, the three-to-one ratio in natural frequencies is investigated. These values are observed to be between the first and second natural frequencies in the cases of the clamped-clamped and clamped-pinned supports, and between the second and third natural frequencies in the case of the pinned-pinned support. Finally, a numeric algorithm is used to solve the three-to-one internal resonance. The first mode is externally excited for the clamped-clamped and clamped-pinned supports, and the second mode is externally excited for the pinned-pinned support. Then, the amplitudes of the first and second modes are investigated when the first mode is externally excited. The amplitudes of the second and third modes are investigated when the second mode is externally excited. The force-response, damping-response, and .frequency- response curves are plotted for the internal resonance modes of vibrations. The stability analysis is carried out for these plots.

关键词： stepped beam three-to-one internal resonance stability analysis nonlinear vibration perturbation method

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Magnetic and quadrupole moments of the Z_(c)(4020)^(+),Z_(c)(4050)^(+),and Z_(c)(4600)^(+)states in the diquark-antidiquark picture

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Chinese Physics C 2024年第1期48卷 7-16页

作者： Ulaş Özdem Health Services vocational School of higher Education Istanbul Aydin UniversitySefakoy-Kucukcekmece34295 IstanbulTürkiye

The magnetic and quadrupole moments of the Z_(c)(4020)^(+),Z_(c)(4050)^(+),and Z_(c)(4600)^(+)states are calculated within the QCD light-cone sum *** compact diquark-antidiquark interpolating currents and the distribution amplitudes of the on-shell photon are used to extract the magnetic and quadrupole moments of these *** magnetic moments are acquired asμZ_(c)=0.50+0.22−0.22μN,μZ_(c)^(1)=1.22+0.34−0.32μN,andμZ_(c)^(2)=2.40+0.53−0.48μN for the Z_(c)(4020)^(+),Z_(c)(4050)^(+),and Z_(c)(4600)^(+)states,*** magnetic moments evaluated for the Z_(c)4020)+,Z_(c)(4050)+,and Z_(c)(4600)+states are sufficiently large to be experimentally *** magnetic moment is an excellent platform for studying the internal structure of hadrons governed by the quark-gluon dynamics of QCD because it is the leading-order response of a bound system to a weak external magnetic *** quadrupole moment results are DZ_(c)=(0.20+0.05−0.04)×10^(−3)fm^(2),DZ_(c)^(1)=(0.57+0.07−0.08)×10^(−3)fm^(2),and DZ_(c)^(2)=(0.30+0.05−0.04)×10^(−3)fm^(2)for the Z_(c)(4020)^(+),Z_(c)(4050)^(+),and Z_(c)(4600)^(+)states,*** obtain a non-zero,but small,value for the quadrupole moments of the Z_(c)states,which indicates a non-spherical charge *** nature and internal structure of these states can be elucidated by comparing future experimental data on the magnetic and quadrupole moments of the Z_(c)(4020)^(+),Z_(c)(4050)^(+),and Z_(c)(4600)^(+)states with the results of the present study.

关键词： hidden-charm tetraquark states electromagnetic form factors magnetic and quadrupole moments QCD light-cone sum rules

Magnetic dipole moments of B_((s))^((*))B_((s))^((*)) states

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Chinese Physics C 2022年第11期46卷 143-153页

作者： Ulas Ozdem Health Services vocational School of higher Education Istanbul Aydin UniversitySefakoy-Kucukcekmece34295 IstanbulTürkiye

We systematically study the magnetic dipole moments of multiquark *** this study,the magnetic dipole moments of possible B^(−)B^(∗−),B^(0)B^(∗−),B^(−)B^(∗0),B^(0)B^(∗0),B_(s)^(0)B^(∗−),B_(−)B_(s)^(∗0),B_(s)^(0)B^(∗0),B^(0)B_(s)^(∗0),and B_(s)^(0)B_(s)^(∗0) states are extracted using light-cone sum *** explore the magnetic dipole moments of these states in a molecular picture with spin-parity JP=1^(+).The magnetic dipole moments of hadrons include useful information on the distributions of internal charge and magnetization,which can be used to understand their geometrical shapes and quark-gluon *** results of the present study along with the spectroscopic parameters may help future theoretical and experimental research on the characteristics of doubly-bottom tetraquark states.

关键词： Magnetic dipole moment doubly-bottom tetraquarks T_(bb)states light-cone sum rules

Analyzing the Flow Field in the Oil Chamber of a Hydrostatic Guide Rail Used for Ultra-Precision Machining: Numerical Simulation and Performance Optimization

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Fluid Dynamics & Materials Processing 2020年第6期16卷 67-83页

作者： Youxin Li Department of Mechanical and Electrical Engineering QingHai Higher Vocational&Technical InstituteHaidong810799China

In order to explore the impact of different structural design parameters and environmental factors on the performance of the hydrostatic guide rail,the flow field inside its oil chamber is simulated,which provides direction and guidance for the design and optimization of the guide rail *** on the theory of fluid lubrication and the Reynolds equation,numerical simulations are performed through a mathematical *** results suggest that the bearing capacity of the oil film increases with the oil supply *** film thickness and the film stiffness share a positive *** oil film thickness and different input pressure parameters can have a significant impact on bearing capacity and oil film *** correlations identified in the present analysis can be used as a basis to optimize the guide rail design.

关键词： Guide rail oil chamber simulation hydrostatic pressure guide rail performance

Project Registration of Complementary Activity in Slovenia

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Journal of Environmental Science and Engineering(A) 2020年第5期9卷 170-173页

作者： Natalija Brečko higher vocational collage School CenterŠentjurCesta na kmetijskošolo 9Šentjur 3230Slovenia

In this paper,author will present the conditions for registration of complementary activities,the number of complementary activities and different types of complementary activities on farms in *** activities on farms must meet certain verifiable *** is also a guarantee to users of the regulated field of *** are aware that a complementary activity on a farm is an added *** is why the complementary activities are considered as an informal brand of farms.A farmer that has at least one hectare of agricultural area in use may register a complementary activity on the farm with the administrative *** exception is a complementary activity which involves beekeeping activities,with at least ten bee families required to be entered in the register of *** this case,the threshold of at least one hectare of comparable agricultural land is not *** of a complementary activity on a farm enables a better use of the production capacities and the workforce of a farm,as well as the acquisition of additional income.

关键词： Farm registration types of complementary activity

Magnetic dipole moments of B((s))((*))B((s))((*)) states

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Chinese Physics C 2022年第11期46卷 149-159页

作者： Ula? ?zdem Health Services vocational School of higher Education Istanbul Aydin University

We systematically study the magnetic dipole moments of multiquark *** this study,the magnetic dipole moments of possible B-B*-,B0B*-,B-B*0,B0B*0,Bs0B*-,B-Bs*0,BsB*0,B0Bs*0, and Bs0Bs*0states are extracted using light-cone sum *** explore the magnetic dipole moments of these states in a molecular picture with spin-parity JP=1+.The magnetic dipole moments of hadrons include useful information on the distributions of internal charge and magnetization,which can be used to understand their geometrical shapes and quark-gluon *** results of the present study along with the spectroscopic parameters may help future theoretical and experimental research on the characteristics of doubly-bottom tetraquark states.

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Spatial statistical analysis of earthquakes in the Fethiye-Burdur fault zone

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Frontiers of Earth Science 2024年第3期18卷 554-564页

作者： Kerem HEPDENIZ Department of Architecture and Urban Planning Bucak EG Technical Sciences and Vocational School of Higher EducationMehmet Akif Ersoy UniversityBurdur 15030Turkey

Turkey is located in the Alpine-Himalayan seismic *** Anatolian plate has witnessed very severe and destructive earthquakes both in the past and *** this study,statistical analyses of earthquakes that occurred between 1914 and 2019 along the Fethiye-Burdur fault zone,which is an active line,were conducted using geographic information *** of standard distance,standard deviational eclipse,mean center,and median center were conducted to determine the geographic distributions of epicenters with a magnitude value of 3.5 and *** and Average Nearest Neighbor analyses were used to reveal the spatial *** Local Moran I and Getis Ord Gi*method were used to determining where the earthquake epicenters are clustered *** Density analyses were conducted to measure earthquake epicenters’*** analysis,Average Nearest Neighbor,Global Moran’s I,and Getis-Ord General G indices demonstrated that earthquakes are clustered in certain regions and are related to each other *** Moran’s I regional analyses revealed that high values were clustered in the West of Burdur city center and the district of Yeşilova,and similar results were obtained in the Getis Ord Gi*method.

关键词： earthquake Geographic Information Systems spatial analysis Fethiye-Burdur fault zone Turkey