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Effective Masses of Mesons and Nucleon in Hot Medium for the Walecka Model

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Chinese Physics Letters 1996年第2期13卷 89-92页

作者： GAO Song ZHANG Yi-jun su ru-keng Department of Physics Fuclan UniversityShanghai 200433 CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Fudan UniversityShanghai 200433

Based on tbe thermo-iield dynamics,the temperature and density dependencies of the elective masses of cr,uj mesons and nucleon in the walecka model have been *** vacuum fluctuation effect is *** is found that the vacuum fluctuation is very important and leads to a reduction of cu-meson mass and an enhancement of a-meson mass in hot and dense medium.

关键词： meson vacuum dynamics

The complexes of multiimidazole with copper(Ⅰ) display tyrosinase activity

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Chinese Chemical Letters 2007年第10期18卷 1278-1280页

作者： Rong Xiao Xiao Yu su ru Gang Xie College of Chemistry Sichuan University Chengdu 610064 China

The six multiimidazole copper（Ⅰ） complexes are utilized to mimic tyrosinase. The main product is 3,5-di-t-butylcatechol from o-hydroxylation of the substrate 2,4-di-t-butylphenol. The highest yield of catechol is up to 82.2% and selectivity 94.8% by [Cu（Ⅰ）2（3b）（MeCN）2]（CIO4）2 and O2 under mild conditions, which are found to be more efficient than that already reported.

关键词： Multiimidazole dicopper(Ⅰ) complex o-Hydroxylation Catechol Tyrosinase model

Regular Black Holes with Cosmological Constant

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Communications in Theoretical Physics 2006年第3X期46卷 453-460页

作者： MO Wen-Juan CAI Rong-Gen su ru-Keng Department of Physics Fudan University Shanghai 200433 China Institute of Theoretical Physics the Chinese Academy of Sciences. P.O. Box 2735 Beijing 100080 China China Center of Advanced Science and Technology (World Laboratory) P.O. Box 8730 Beijing 100080 China

We present a class of regular black holes with cosmological constant A in nonlinear electrodynamics. Instead of usual singularity behind black hole horizon, all fields and curvature invariants are regular everywhere for the regular black holes. Through gauge invariant approach, the linearly dynamical stability of the regular black hole is studied. In odd-parity sector, we find that the A term does not appear in the master equations of perturbations, which shows that the regular black hole is stable under odd-parity perturbations. On the other hand, for the even-parity sector, the master equations are more complicated than the case without the cosmological constant. We obtain the sufficient conditions for stability of the regular black hole. We also investigate the thermodynamic properties of the regular black hole. and find that those thermodynamic quantities do not satisfy the differential form of first law of black hole thermodynamics. The reason for violating the first law is revealed.

关键词： regular black hole stability thermodynamics

Statistical Entropy of Three-Dimensional Spherical Spacetime

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Chinese Physics Letters 2000年第3期17卷 177-179页

作者： WANG Ein su ru-Keng FENG Shi-Xiang Department of Physics Fudan UniversityShanghai 200433 Department of Physics Shanghai Normal UniversityShanghai 200234 Department of Modern Physics University of Science and Technology of ChinaHefei 230026

Ey means of conformal Held theory,we have related the degrees of freedom of microstates to the entropy of three-dimensional charged black hole as well as the entanglement entropy of three-dimensional De Sitter spacetime,We have shown that the degrees of freedom of the conformal theory responsible for the entropy represent states on the horizon and localized in physical spacetime.

关键词： entropy conformal states

Circumventing brittleness of 3D-printed Al_(2)O_(3)cellular ceramic structures via compositing with polyurea

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Rare Metals 2024年第11期43卷 5994-6005页

作者： Xue-Qin Zhang ru-Yue su Xiong Gao Jing-Yi Chen Guo Liu ru-Jie He Ying Li Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Department of Mechanical Engineering City University of Hong KongHongKong999077China

Benefiting from excellent mechanical properties and low density,cellular ceramic structures(CCSs)are competitive candidates as structural ***,inherent brittleness from strong chemical bonds among atoms extremely impeded CCSs'*** materials occupied outstanding strength and toughness simultaneously due to the dual-phase interpenetrated *** by natural materials,it was proposed to fabricate coating covered and fulfilled polyurea/CCS interpenetrated composites(C/CCSs and B/CCSs)to circumvent the brittleness of 3D-printed Al_(2)O_(3)*** was demonstrated that polyurea coating had less effect on the compressive strength of C/CCSs but tremendously improved their energy-absorbing *** energy-absorbing ability of C/CCSs was improved from26.48-52.57 kJ·m^(-3)of CCSs to 1.04-1.89 MJ·m^(-3)because of the extended plateau ***,compressive strength and energy-absorbing ability of B/CCSs were strengthened to 1.33-1.36 and 2.84-4.61 times of C/CCSs,***,failure mode of C/CCSs changed from localized deformation to fracturing entirely with the increase in relative density of CCSs inside,which was the same as that of ***,with the help of polyurea coating,C/CCSs were still intact at strains up to60%,which would neve r fail catastrophically as CCSs at low strains.B/CCSs tended to fracture as a whole,which was not influenced by relative density of pristine *** was believed that this work provided a creative way to circumvent the brittleness of CCSs and improve their mechanical performances.

关键词： Cellular ceramic structures Dual-phase interpenetrated composites Energy-absorbing ability Compressive strength 3D printing

Strange Hadronic Matter in a Chiral Model

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Chinese Physics Letters 2000年第12期17卷 874-876页

作者： ZHANG Li-Liang SONG Hong-Qiu WANG Ping su ru-Keng Shanghai Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Department of Physics Fudan UniversityShanghai 200433 Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 Institute of High Energy Physics Chinese Academy of SciencesBeijing100039

The strange hadronic matter with nucleon,Λ-hyperon andΞ-hyperon is studied by using a chiral symmetry model in a mean-field *** saturation properties and stabilities of the strange hadronic matter are *** result indicates a quite large strangeness fraction(fs)region where the strange hadronic matter is stable against particle *** the large fs region,theΞcomponent dominates,resulting in a deep minimum in the curve of the binding energy per baryon EB versus the strangeness fraction fs with(EB,fs)~_(-26.0MeV,1.23).

关键词： approximation. symmetry Chiral

Effective Mass of p-Meson in Medium

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Chinese Physics Letters 1999年第11期16卷 793-795页

作者： WANG Ping su ru-keng Department of Physics Fudan UniversityShanghai 200433

The effective mass of ρ-meson in medium has been calculated for the Welecka, Bonn potential, Zimanyi-Moszkowski, quark-meson coupling and vector-tensor coupling models, respectively. The vacuum fluctuation effects are taken into account. It is shown that the formula of nucleon effective mass suggested by Brown-Rho scaling can get a best fit with experiments provided the adjusted parameter y equals to 0.10 and 0.19 for strong and weak tensor coupling, respectively.

关键词： coupling tensor meson

Microstructure and microhardness of a novel TiZrAlV alloy by laser gas nitriding at different laser powers

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Rare Metals 2020年第3期39卷 270-278页

作者： Zhi-Hao Feng Xin-Yang sun Peng-Biao Han Hang Fu Hui-Cong Dong Shun Guo ru su Jian-Hui Li Hebei Key Laboratory of Material Near-net Forming Technology Hebei University of Science and TechnologyShijiazhuang050000China Hebei Engineering Laboratory of Aviation Lightweight Composite Materials and Processing Technology Hebei University of Science and TechnologyShijiazhuang050000China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

The Ti-20Zr-6.5Al-4V(T20Z,wt%)alloy surface was treated by the process of laser surface *** evolution of microstructures and microhardness has been investigated by changing the laser power parameter from 120 to 240 *** laser-treated T20Z samples show two regions with distinctly different microstructural features,as compared with the untreated substrate:dense TiN dendrites and(α+β)-Ti(remelting zone,RMZ),nanoscaleαlaths doped with part of p phase(heat-affected zone,HAZ).The formation of TiN dendrites can be analyzed by a series of complex reactions during the process of melting and *** increase in laser power results in the increase in content of TiN dendrite which is mainly due to the increase in energy *** HAZ,the self-quenching effect leads to the formation of nanoscale a laths and the residue ofβ*** profile of different regions was measured from the surface to the interior,and the highest microhardness was obtained(~HV 916.8)in the RMZ,as the laser power was set to 240 *** the present study,we explained various microstructural characteristics induced by laser surface nitriding treatment.

关键词： TiZrAlV alloy Laser surface nitriding Microstructure TiN dendrites Microhardness

miR-106b promotes cancer progression in hepatitis B virusassociated hepatocellular carcinoma

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World Journal of Gastroenterology 2016年第22期22卷 5183-5192页

作者： Chia-Sheng Yen Zhi-ru su Yi-Ping Lee I-Ting Liu Chia-Jui Yen Institute of Clinical Medicine National Cheng Kung University Department of General surgery Chi Mei Medical Center Division of Hematology and Oncology Department of Internal Medicine National Cheng Kung University Hospital College of Medicine National Cheng Kung University

AIM: To investigate the effect of mi R-106 b on tumor progression in hepatitis B virus(HBV)-associated hepatocellular carcinoma(HCC).METHODS: A total of 120 patients who underwent liver resection for HCC at National Cheng Kung University Hospital were enrolled in the present study. Micro RNA(mi RNA) array was first used to screen the mi RNA expression profiles in HCC patients. The clinical records were retrospectively analyzed, and correlations with the mi RNA expression profiles were evaluated. The m RNA expression levels of the mi R-106b-25 cluster(mi R-106 b, mi R-93 and mi R-25), and MCM7 in tumor and non-tumor samples were quantitated using quantitative real-time reverse transcription-polymerase chain reaction(q-RT-PCR) analysis, and correlations in the levels of mi R-106 b, mi R-93 and mi R-25 expression were calculated. Kaplan-Meier overall and diseasefree survival rates of HBV-associated HCC patients were analyzed using the log-rank test based on mi R-106 b expression. The comparison of the mi R-106 b expression levels in patients with different clinical outcomes was analyzed using Mann-Whitney U tests. Furthermore, a hepatitis B virus X protein(HBx) expression plasmid was transfected into Huh7 and Hep 3B cells. The expression levels of the mi R-106b-25 cluster and MCM7 in HBx-expressing Huh7 and Hep 3B cells were detected using q-RT-PCR. REsuLTS: mi RNA array screening showed that mi R-106 b and its cluster, mi R-93 and mi R-25 were upregulated in HCC patients(P sue(P sues(mi R-1

关键词： mi R-106b Hepatitis B virus Hepatocellular carcinoma Tumor progression Hepatitis B virus X protein