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α-clustering effect on flows of direct photons in heavy-ion collisions

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Nuclear Science and Techniques 2021年第6期32卷 122-132页

作者： chen-Zhong shi Yu-Gang Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China University of the Chinese Academy of Sciences Beijing 100080China

In this study,we reconstruct theγ-photon energy spectrum,which is in good agreement with the experimental data of ^(86)Kr+^(12)C at E/A=44 Me V within the framework of the modified EQMD *** directed and elliptic flows of free protons and direct photons were investigated by considering theα-clustering structure of ^(12)*** with free protons,direct photon flows provide clearer information about the early stage of a nuclear *** difference in the collective flows between different configurations of ^(12)C is observed in this *** indicates that the collective flows of direct photons are sensitive to the initial ***,theγbremsstrahlung process might be taken as an alternative probe to investigate theα-clustering structure in a light nucleus from heavy-ion collisions within the Fermienergy region.

关键词： Nuclear reaction Direct photon Collective flow α-clustering configuration

Conservation and Density Wave Equations of Plasma in Presence of Intense Laser Field

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Chinese Physics Letters 1997年第2期14卷 113-116页

作者： LIU shi-bing chen shi-gang Graduate School China Academy of Engineering PhysicsBeijing 100088 Institute of Applied Physics and Computational Mathematics Beijing 100088

The pressure tensor,energy density,and conservation equations of plasma in an intense laser field are derived by using a nonequilibrium distribution *** results show that the effect of the intense laser field on the behavior of plasma cannot be *** an application,the adiabatic equation of state,electronic density wave equation,and relevant dispersion relation are obtained for the electrostatic wave behavior.A substitution relation of the conserwtion equations from weak to intense field limits are presented.

关键词： function. intense equation

Brillouin Instability in Underdense Plasma Under an Intense Laser Field

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Chinese Physics Letters 1997年第11期14卷 861-864页

作者： LIU shi-bing chen shi-gang Graduate School China Academy of Engineering PhysicsBeijing 100088 Institute of Applied Physics and Computational Mathematics Beijing 100088

The dispersion relation of the ion acoustic wave in an intense laser field is obtained by using a nonequilibrium distribution *** Brillouin scattering instability is examined by numerical *** a high strength laser field,the driven electrons density fluctuation is a high frequency oscillation while ions are treated as an immobile plasma background due to the large ion mass and the high laser frequency.

关键词： function. scattering Brillouin

Lithospheric strength of the Anatolian plateau and implications for strong earthquake activity in Turkey

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Geodesy and Geodynamics 2024年第3期15卷 209-218页

作者： Yuhang Pan shi chen Wen shi Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Baijiatuan Earth Science National Observation and Research Station Beijing 100095China

On February 6, 2023, the doublet earthquake including two main shocks with magnitudes M_(W)7.8 and M_(W)7.5, occurred near the western side of the East Anatolian Fault at the southeast boundary of the Anatolian Plateau in Turkey. Based on the WGM2012 Bouguer gravity anomaly data and the Etopo1topography data, this study first introduced a joint inversion of admittance and coherence functions and used the Bayesian optimal parameter estimation method to obtain the effective elastic thickness Teand loading ratio F of the lithosphere for various tectonic units in the Anatolian Plateau. Secondly, we discussed the characteristics and influencing factors of the lithospheric mechanical strength and analyzed its relationship with seismic activity. The lithospheric mechanical strength of the Anatolian Plateau showed clear lateral heterogeneity and a "weak-strong-weak" spatial pattern from east to west,reflecting various tectonic processes. At last, the strong seismic activity was found where the lithospheric strength was low in the Anatolian Plate. We also incorporated GPS strain rate and other results to investigate the tectonic background and primary causes of the M_(W)7.8 and M_(W)7.5 doublet earthquakes in Turkey. The results have a good insight into urban safety design in the Turkish region, including postdisaster rehabilitation, earthquake hazard assessment, and loss reduction.

关键词： Effective elastic thickness Anatolian plateau Turkey doublet earthquakes Bayesian optimization

Thermal behavior analysis of nickel/metal hydride battery during overcharging

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Science China Chemistry 2010年第5期53卷 1176-1181页

作者： Yang, Kai An, JinJing chen, shi School of Chemical Engineering and Environment Beijing Institute of Technology Beijing 100081 China Electrical Engineering Department China Electric Power Research Institute Beijing 100192 China

To analyze the thermal behavior of the cylinder Ni/MH battery during overcharging,a two-dimensional thermal model is provided in this *** reliable data is provided to create the precise thermal *** amount of heat of the battery during overcharging at different currents was measured using quartz frequency *** obtain the heat transfer coefficient of the battery during overcharging,the heat dissipation rate was fitted into linear functions and three different exponential functions from the temperature value measured by the *** heat dissipation process after the linear stage was regared to accord with some mathematical differential expressions,which facilities understanding of the variation rule of heat dissipation rate during the transition stage and overcharging *** values were used as heat generation rates in the heat transport *** the measured data,the internal temperature profiles at the end of each stage during charging at 1C,3C and 5C were simulated using FEM.

关键词： Ni/MH battery thermal model microcalorimeter

Lung tissue flap repairs esophagus defection with an inner chitosan tube stent

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World Journal of Gastroenterology 2009年第12期15卷 1512-1517页

作者： Gang chen Wen-Jun shi Department of Thoracic Surgery Shengjing Hospital China Medical University Shenyang 110004 Liaoning Province China

AIM： TO repair the partial esophagus defect with a chitosan stent, a new esophageal prosthesis made of pulmonary tissue with vascular pedicie.METHODS： Fifteen Japanese big ear white rabbits were divided into experimental group （n = 10） and control group （n = 5）. Esophagus defect in rabbits of experimental group was repaired using lung tissue flap with a chitosan tube stent, gross and histological appearance was observed at week 2, 4 and 8 after operation, and barium sulphate X-ray screen was performed at week 10 after operation. Esophagus defect of rabbits in control group was repaired using lung tissue flap with no chitosan tube stent, gross and histological appearance was observed at week 2, 4 and 8 after operation, and barium sulphate X-ray screen was performed at week 10 after operation.RESULTS： In the experimental group, 6 rabbits survived for over two weeks, the lung tissue flap healed esophageal defection, and squamous metaplasia occurred on the surface of lung tissue flap. At week 10 after operation, barium sulphate examination found that barium was fluent through the esophagus with no stricture or back stream, the creeping was good. In the control group, 4 rabbits survived for two weeks, the lung tissue flap healed esophageal defection with fibrous tissue hyperplasia, barium sulphate examination found that barium was fluent through the esophagus with a slight stricture or back stream, and the creeping was not good at week 10 after operation.CONCLUSION： Esophagus defect can be repaired using lung tissue flap with an inner chitosan tube stent.

关键词： Lung Tissue flap Chitosan Stent Esophagus reconstruction

High-Order Harmonic Generation in the Ionization Process

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Chinese Physics Letters 2000年第10期17卷 723-725页

作者： chen Jing chen shi-Gang LIU Jie Institute of Theoretical Physics Chinese Academy of ScienceBeijing 100080 Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088

Based on the nonperturbative quantum electrodynamics scattering theory for multiphoton ionization developed recently,high-order harmonic generated in the ionization process is *** influence of the Coulomb potential is treated as a perturbation in the expansion of the transition *** is deduced that the harmonic photons are emitted in the resonant process during ionization and the width of the harmonic peaks is just the ionization rate of the atom.

关键词： matrix. harmonic ionization

Quantum Electrodynamic Perspective on Multiphoton Ionization

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Chinese Physics Letters 1999年第12期16卷 888-890页

作者： chen Jing chen shi-gang LIU Jie Institute of Applied Physics and Computational Mathematics Beijing 100088 Graduate School of China Academy of Engineering Physics P.O.Box 2101Beijing 100088

A fully quantum nonperturbative method is developed to describe multiphoton ionization in intense fields. It is shown that, treating the radiation field with quantum electrodynamic(QED) theory enables u s to obtain the above-threshold ionization energy distribution spectrum in analytical form firstly. Moreover, in addition to the well-known semiclassical theory, the framework presented here, derived from a QED perspective, provides a new picture of the multiphoton ionization.

关键词： dynamic quantum ionization

HIGH-RESOLUTION SEMI-DISCRETE CENTRAL SCHEME FOR DAM-BREAK PROBLEMS

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Journal of Hydrodynamics 2005年第5期17卷 585-589页

作者： chen Jian-zhong shi Zhong-ke College of Automation Northwestern Polytechnical University Xi＇an 710072 China

A numerical model for simulating the dambreak problems was presented. The model was based on a high-resolution semi-discrete central-upwind difference scheme. In order to reduce spurious oscillation, the uniformly non-oscillatory limiter was employed. A third-order total variation diminishing Runge-Kutta method is used for time integration. The main feature of the presented method is its simplicity. It requires no Riemann solvers, no flux splitting and no flux limiter. It is explicit and does not require dimensional splitting for two dimensions. The Simpson quadrature rule was employed to compute the source term. To verify the effectiveness and accuracy of the proposed method, the 1D dambreak, circular dam-break and partial dam-break problems were simulated. The results are shown to be in good agreement with analytical solution and numerical results obtained by other methods.

关键词： dam-break shallow water equations central-upwind difference scheme